JP2003245811A - Machining tool device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machining tool device capable of giving a machining tool motion different from that of a tool main shaft without using a special machine tool. <P>SOLUTION: The valve seat machining tool device makes the tool main shaft 20 rotate around an axis line to machine seat inner circumference 87, 88 and 89 of a valve seat 86 by tools 66, 67 and 68 and machine a stem hole 112 by a reamer 106. The reamer 106 is axially moved by using a hydraulic cylinder 150. The hydraulic cylinder 150 is actuated by using a working fluid. A variable throttle 282 is provided on the way of a discharge channel 182 for the hydraulic cylinder 150 to control the forward speed of a piston 154 at a speed suitable for reaming. After the completion of reaming, a hydraulic fluid in a hydraulic chamber 174 flows out of a supply channel 180, while the hydraulic fluid pressurized and contained in a variable volume chamber 224 flows into a hydraulic chamber 176 via the discharge channel 182. Then a check valve 300 is opened to allow the inflow of the hydraulic fluid from the other discharge channel 182, promptly returning the reamer 106 into a device body 10. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining tool device which is attached to a tool spindle of a machining machine and holds a machining tool for machining such as cutting and grinding.

[0002]

2. Description of the Related Art If a tool is attached to a tool spindle of a machine tool and at least one of rotation and axial movement is given to the tool spindle, the tool is moved relative to a workpiece,
The work piece can be processed. However, when the processing tool cannot move relative to the tool spindle, the motion that can be imparted to the processing tool is limited to the movement imparted to the tool spindle,
It is inevitable that the types of processing that can be performed are limited.

Therefore, it has been conventionally practiced to provide a tool holding member capable of relative movement with respect to the apparatus main body fixed to the tool spindle, and to attach the processing tool to the tool holding member. The cutting tool device for valve seat processing described in JP-A-11-347812 is an example thereof. By doing this, it is possible to impart a motion different from that of the tool spindle to the processing tool, and increase the types of cutting processing that can be performed. However, this type of conventional cutting tool device for a machining machine is driven by a driving device provided on the machining machine side, and requires a special machining machine. In many cases, another drive shaft is provided inside the hollow tool spindle, and the relative motion of the drive shaft with respect to the tool spindle (rotational motion, axial motion, or both) is unchanged or a motion conversion mechanism. Is converted into another motion by the and transmitted to the tool holding member.

[0004]

In view of the above circumstances, the present invention is capable of imparting a motion different from the tool spindle to a working tool without using a special machining machine. According to the present invention, a tool device for a machine processing machine according to each of the following aspects can be obtained. Similar to the claims, each mode is divided into paragraphs, each paragraph is numbered, and the numbers of other paragraphs are referred to as necessary. This is merely for facilitating the understanding of the present invention, and the technical features and combinations thereof described in the present specification should not be construed as being limited to those described in the following respective sections. . Moreover, when a plurality of items are described in one section, it is not always necessary to adopt the plurality of items together. It is also possible to select and use only some of the items.

In the following items, (1) corresponds to claim 1, (2) to claim 2, and (4) to claim 3.
And (5) and (6) are combined in claim 4, (9)
The combination of the terms (10) and (11) is in claim 5, (18) is in claim 6, (19) is in claim 7, and (20) is in claim 8.
(22) corresponds to claim 9, respectively.

(1) A device main body which is attached to and detached from a tool spindle of a machine processing machine, a tool holding member which is held by the device main body so as to be capable of relative movement and holds a processing tool, and a hydraulic pressure provided on the device main body. In a machining tool device including a hydraulic actuator that operates in accordance with (4) and a motion transmission device that transmits a dynamic motion of a mover of the hydraulic actuator to the tool holding member, Of the pair of hydraulic chambers formed on both sides of the mover, and a discharge passage that allows the working fluid to flow out from one of the pair of hydraulic chambers and the other that is provided in the discharge passage. And a throttling device that regulates the outflow rate of the hydraulic fluid from the hydraulic chamber.

When a pressurized liquid is supplied to the machining tool device of this section from the supply passage, the liquid actuates the hydraulic actuator. At that time, the hydraulic fluid flows out of the hydraulic chamber on the opposite side of the hydraulic actuator to the side to which the pressurized fluid is supplied, but the outflow speed is regulated by the expansion device, so that the hydraulic actuator The operating speed is also regulated. Since the movement of the mover of the hydraulic actuator is transmitted to the tool holding member by the movement transmission device, the movement speed of the tool holding member is also restricted. Therefore, if the squeezing device is set so that the motion speed of the processing tool is a speed suitable for the mechanical processing, the mechanical processing is appropriately performed by the processing tool. The processing tool may be a cutting tool or a grinding tool.

The hydraulic actuator may be either a hydraulic cylinder in which the mover moves linearly or an oscillating cylinder in which the mover rotates. The tool holding member should be movable with respect to the device body in a direction parallel to the center axis of the device body, or in a direction perpendicular to the center axis or in a direction inclined to the center axis. Even more
It may be rotatable about a rotation axis that forms an arbitrary angle including 0 with respect to the central axis. The motion transmission device
It may be one that simply transmits the motion of the mover to the tool holding member, or one that is equipped with a motion conversion mechanism that converts the motion. It should be selected based on both.

In any case, the tool holding member and the working tool held by the tool holding member can be moved relative to the apparatus main body, and the apparatus main body is attached to the tool main spindle of the machine tool and the tool main spindle is attached. Exercise is given by. Therefore, the processing tool can be caused to perform a motion different from the motion of the tool spindle, that is, a motion corresponding to the sum of the motion of the tool spindle and the relative motion of the tool holding member with respect to the tool spindle. When the processing tool other than the processing tool held by the tool holding member is attached to the apparatus main body, different motions are applied to the plurality of processing tools, and different machining is performed at a plurality of positions of the workpiece. In this case, the effect of the present invention can be particularly effectively enjoyed, but it is not essential. The effect of the present invention can be obtained because a motion different from the motion imparted to the apparatus main body by the tool spindle can be imparted to the processing tool. For example, in a machining center, various cutting processes are performed by exchanging cutting tools.However, there are still some machining processes that are unsuitable or impossible to perform in the machining center. It is usually performed by another dedicated machine.
On the other hand, if this machining tool device is attached to the tool spindle of a machining center, it is possible to perform cutting processing that was previously unsuitable or impossible for the machining center by the machining center. It is possible to reduce costs or improve processing efficiency. Even if the machine tool does not have a separate drive shaft inside the tool spindle, it operates the machining fluid supply device and hydraulic actuator that pressurize the machining fluid such as cutting fluid and grinding fluid to the machining tool. Since a working fluid supply device for supplying a working fluid for the purpose is often provided, the machining tool device according to the present invention can be used in a wide range of machining machines.

(2) The machining tool device according to item (1), wherein the expansion device includes a variable expansion device having a variable flow passage area. If the expansion device is a variable expansion device, the operating speed of the hydraulic actuator can be arbitrarily set, and the application of the machining tool device is widened. (3) The variable throttle device includes a movable valve element that is movable according to a manual operation, and includes a manual variable throttle valve whose flow passage area can be changed by the movement of the movable valve element. Tooling equipment for machining. The variable throttle device can be an electromagnetic throttle valve operated by a solenoid or an electric motor, etc., but if it is a manual variable throttle valve, it can be used to supply power to the device main body that is attached to the tool spindle of a machine tool. Since it is not necessary to connect the lead wire, etc., it is easy to attach and detach. (4) A check valve is provided in the discharge passage in parallel with the throttle device to allow the hydraulic fluid to flow into the other hydraulic chamber but prevent the hydraulic fluid from flowing out. The tool device for machining according to any one of 1. It is possible to restrict not only the outflow of hydraulic fluid from the hydraulic chamber but also the flow rate of inflow by the throttle device, but the motion of the processing tool is low in the forward direction and high in the reverse direction. Is often desirable. If a check valve is provided, this requirement can be easily satisfied. (5) The machining tool device according to any one of (1) to (4), which includes a hydraulic fluid storage device that is provided in the main body of the apparatus and stores the hydraulic fluid discharged through the discharge passage.
It is also possible to store the discharge passage in a hydraulic fluid storage device provided on the machine processing machine side through a liquid passage provided on the tool spindle or the main body of the machine processing machine. However, if the working fluid storage device is provided in the machine body of the machining tool device itself, when the machining tool device is mounted on the tool spindle of the machining machine, the liquid passage to be communicated is only the supply passage. The attachment and detachment of the machining tool device to and from the tool spindle and the structure of the device are simple. (6) In the item (5), the hydraulic fluid accommodating device includes a pressure accumulator that is connected to the other hydraulic chamber via the discharge passage and stores the hydraulic fluid discharged from the other hydraulic chamber under pressure. The described machining tool device. The hydraulic fluid accommodating device has only to accommodate the hydraulic fluid discharged from the hydraulic chamber of the hydraulic actuator, but is preferably a pressure accumulator capable of accommodating under pressure. This is because in the case of the pressure accumulator, the hydraulic actuator can be operated in the reverse direction by positively returning the hydraulic fluid once stored to the hydraulic actuator. However, for this purpose only, it can be achieved by providing a biasing device that biases the mover of the hydraulic actuator in the opposite direction. When both the hydraulic actuator and the accumulator have a structure that is axisymmetric with respect to the central axis of the main body of the machining tool device, the hydraulic fluid in the hydraulic actuator as well as under pressure in the accumulator must be pressurized. Since the stored hydraulic fluid also maintains an axially symmetrical shape with respect to the central axis of the machine body, when the machining tool device is rotated together with the tool spindle, the mass of the hydraulic fluid is eccentric It is possible to prevent the dynamic balance of the machining tool device from being deteriorated. (7) The accumulator has a cylinder bore formed in the main body of the apparatus, a piston fitted in the cylinder bore in a liquid-tight and slidable manner, and a piston formed on one side of the piston, and the other end is formed by the discharge passage. Machining according to item (6), which is a piston type pressure accumulator including a variable volume chamber connected to the hydraulic pressure chamber and an urging device that urges the piston in a direction in which the volume of the variable volume chamber decreases. Tool device. A pressurized gas pressure accumulator equipped with a bladder, bellows, etc. in which pressurized gas is enclosed can be adopted, but a piston pressure accumulator is suitable for the machining tool device. (8) The hydraulic actuator is a hydraulic cylinder including a cylinder bore formed in the main body of the apparatus and a piston as the mover, which is fluid-tightly and slidably fitted in the cylinder bore. A tool device for machining according to any one of items (6) to (6). The movement of the piston as a mover is usually taken out of the hydraulic cylinder via a piston rod fixed to the piston. The piston rod or a member fixed thereto may constitute a motion transmission device, but in some cases, these motions are converted and transmitted to the tool holding member. (9) A first hydraulic actuator including a first cylinder bore formed in the main body of the apparatus, and a first piston as the mover, which is fluid-tightly and slidably fitted in the first cylinder bore. A hydraulic cylinder, wherein the pressure accumulator is a second cylinder bore formed in the main body of the apparatus, a second piston fluidly and slidably fitted in the second cylinder bore, and one side of the second piston. Piston type including a variable volume chamber that is formed on the second volume chamber and is connected to the other hydraulic chamber by the discharge passage, and an urging device that urges the second piston in a direction in which the volume of the variable volume chamber decreases. The machining tool device according to (6), which is a pressure accumulator. (10) The tool device for machining according to the item (9), wherein the first cylinder bore and the second cylinder bore are formed concentrically with each other. For machining when the first cylinder bore and the second cylinder bore are formed concentrically with each other and the hydraulic actuator and the piston type pressure accumulator are configured to be axisymmetric with respect to the central axis of the machining tool device. When the tool device is rotated together with the tool spindle, it becomes easy to maintain a dynamic balance. (11) The piston type pressure accumulator has a through hole in a central portion thereof and has a generally cylindrical shape with a hole, and the first hydraulic cylinder is arranged inside the cylindrical pressure accumulator with a hole (10 ) The tooling device for machining according to the section. Although it is possible to reverse the arrangement of the first hydraulic cylinder and the accumulator to this section, arranging the first hydraulic cylinder on the center side provides the functions required for the machining tool device. Often easy to meet. (12) The perforated cylindrical accumulator has a generally cylindrical shape in a bottomed hole formed in the apparatus body, and the stepped cylindrical member having an outer peripheral surface having a large diameter portion and a small diameter portion is liquid-tight. By fitting into the housing, an annular space is formed between the inner peripheral surface of the bottomed hole and the outer peripheral surface of the small diameter portion, and the housing is liquid-tight and slidable in the annular space. A second piston having a cylindrical shape with a hole fitted into the housing, and a plurality of spring members respectively arranged between a plurality of circumferentially separated portions of the second piston and the housing (11) The tool device for machining according to the item. As a biasing device for biasing the second piston toward the variable volume chamber, a disc spring or the like arranged concentrically with the second piston can be adopted, but a plurality of spring members are used as in this section. In many cases, it is desirable to dispose the second piston between a plurality of circumferentially separated positions of the second piston and the housing. This is especially the case when the diameter of the second piston is relatively large. (13) The device main body includes a taper fitting portion that is fitted into a taper hole of the tool spindle, and an annular groove having a V-shaped cross section, and is held by the tool holding portion of the tool changing device. Automatically exchanged by an automatic tool changer including a held portion and a tool holding portion which is provided on the opposite side of the held portion from the taper fitting portion and holds the processing tool in a relatively movable manner. The machining tool device according to any one of (1) to (12). The tooling device for machining of this section can be automatically replaced by an automatic tool changing device, and if it is used as one of the cutting tools for a machining center, it is possible to increase the types of cutting work that can be performed by the machining center. (14) The machining tool device according to item (13), wherein the supply passage is formed in the taper fitting portion in parallel with a central axis of the taper fitting portion. In the machining tool device according to the present invention, when a sleeve that is rotatable relative to the device body is attached to the outer peripheral side of the device body, and a connection tool is provided on the sleeve, the machining tool device is attached to the tool spindle. , The connection tool may be connected to another connection tool provided in the spindle housing of the machining machine so that the pressurized liquid is supplied to the machining tool device via the connection tool. It is possible. However, in many cases, the tool spindle of a machine tool is hollow, and machining fluid or working fluid can be supplied through the center hole. The tooling device for machining of this section is
The working fluid and the working fluid can be easily introduced from the supply passage, and the working fluid and the working fluid can be easily used as the working fluid of the hydraulic actuator. (15) The machining tool device according to (14), wherein the supply passage is connected to a machining liquid supply passage formed by penetrating the held portion and the tool holding portion in parallel with the central axis. . (16) The machining tool device according to (7), further including a stopper that defines a movement limit of the piston toward the variable volume chamber by the biasing device. If the movement limit of the piston toward the variable volume chamber is defined by the stopper, the minimum volume of the pressure accumulator is defined, and the operation amount of the hydraulic actuator by the hydraulic fluid returned from the pressure accumulator is also defined. (17) The machining tool device according to item (16), wherein the apparatus main body is provided with an inlet for introducing the hydraulic fluid into the variable volume chamber, and the inlet is normally closed by a closing member. When the stopper prevents the piston from moving toward the variable volume chamber, the hydraulic fluid in the variable volume chamber is not pressurized.
Therefore, even if the inlet is opened, the hydraulic fluid does not squirt to the outside, and it is possible to easily supply the hydraulic fluid to the variable volume chamber and the hydraulic actuator and to close the inlet. (18) The tool holding member is held by the apparatus body so as to be movable in a direction parallel to the central axis of the apparatus body.
The tool device for machining according to any one of (1) to (17). A typical mode is one in which the tool holding member is provided so as to be movable on the central axis in parallel with the central axis, but it is also possible to provide the tool holding member at a position eccentric from the central axis so as to be movable parallel to the central axis. is there. (19) The tool holding member is held by the apparatus body so as to be movable in a direction perpendicular to the central axis of the apparatus body.
The tool device for machining according to any one of (1) to (18). For example, if the groove holding tool is held by the tool holding member of the machining tool device of this section, the annular groove can be easily formed on the inner peripheral surface of the hole. One example is the formation of an O-ring groove for disposing an O-ring. By rotating the machining tool device in the axial direction while rotating it, it is possible to form an inclined groove such as an oil groove, which is inclined with respect to the center line of the hole, on the inner peripheral surface of the hole. In this case, it is desirable to reciprocate the tool device main body in the axial direction and gradually increase the supply amount of the hydraulic fluid to the hydraulic actuator during each forward movement. For example, a certain amount of hydraulic fluid is supplied to the hydraulic actuator to cause the processing tool to project radially outward from the device body by a certain amount, and in that state, the device body is rotated and moved in the forward direction to form a shallow groove. Then, operate the hydraulic actuator in the opposite direction to retract the processing tool,
In that state, move the device body in the opposite direction, then increase the amount of hydraulic fluid supplied to the hydraulic actuator to increase the amount of protrusion of the processing tool, and move the device body in the forward direction again to increase the depth of the groove. By repeating this operation, the inclined groove having a desired depth can be cut. Also,
The lead angle of the inclined groove can be arbitrarily changed by arbitrarily changing the ratio between the rotation speed of the device body and the moving speed in the axial direction. (20) The machining according to any one of (1) to (19), wherein the tool holding member is held by the apparatus body so as to be movable in a direction inclined with respect to a central axis of the apparatus body. Tool device. The machining tool device of this section is, for example,
This is effective when machining the inner peripheral surface of the taper with high accuracy. (21) The machine according to any one of (1) to (20), wherein the apparatus main body includes a tool holding portion that holds a processing tool different from the processing tool without the tool holding member interposed. Processing tool device. The engine valve seat machining tool device described in the next section is an example of the machining machine tool apparatus in this section, but is not limited thereto. In the tool holding member that can move relative to the device body and the device body itself,
By holding the processing tools respectively, different motions can be applied to the processing tools, and a plurality of types of processing can be performed on a plurality of locations of the workpiece. These multiple types of processing may be performed simultaneously in parallel or at different times. (22) The tool holding member is removably held in the apparatus main body so as to be movable on the central axis of the apparatus main body in parallel with the central axis, and to ream a stem hole for slidably holding the valve stem of the engine. And a cutting tool for cutting the plurality of tapered inner peripheral surfaces having different tapers and forming the valve seat of the engine are attached to the apparatus body. The machining tool device according to any one of (1) to (17). According to the machining tool device of this item, the stem hole and the valve seat can be concentrically processed with high accuracy. First, the valve seat is cut and then the stem hole is reamed, so both processes are often performed at different times, but at least some of them are done in parallel. Good.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A machining tool device according to an embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a valve seat machining tool device which is a machining tool device of the present embodiment. The valve seat machining tool device is a device for precisely and concentrically machining a valve seat and a stem hole that slidably holds a valve stem of an engine, which is a workpiece. In FIGS. 1 and 2, reference numeral 10 denotes a device body of a valve seat processing tool device. The device body 10 is generally in the form of a stepped cylinder. The device main body 10 is composed of a plurality of members for the convenience of manufacturing, and these members are integrated by a plurality of bolts which are fixing devices in a state where the phases are mutually determined.
Function as. The apparatus main body 10 includes a housing portion 11 having a generally hollow cylindrical shape, and a fitting portion provided at a rear end portion (right side in FIG. 1) which is one end portion of both end portions of the housing portion 11 separated in the axial direction. 12 and a tool holding portion 14 that holds the processing tool provided at the other end portion (the left side in FIG. 1) on the side opposite to the fitting portion 12 in the axial direction.

The apparatus main body 10 is detachably attached to a tool spindle 20 of a machining center, which is a kind of machining machine, at a fitting portion 12. Various machining tool devices (including the valve seat machining tool device) attached to the tool spindle 20 are automatically replaced by an automatic tool changing device (not shown). Therefore, the fitting portion 12 of the valve seat processing tool device includes the held portion 24 that is held by the tool holding arm that is the tool holding portion of the automatic tool changing device. The held portion 24 is the fitting portion 1
An annular groove 26 having a V-shaped cross section is formed in an axially intermediate portion of the flange-like portion having a diameter larger than that of the taper fitting portion 25 forming the rear end portion of the second portion 2. Held part 2
By holding 4 on the tool holding arm in the annular groove 26, the machining tool device including the valve seat machining tool device can be automatically attached to and detached from the tool spindle 20.

The holding portion 24 of the fitting portion 12 has a plurality of openings (in the present embodiment, two locations spaced apart in the diametrical direction) that are parallel to the axial direction and open to the rear end surface 30 of the holding portion 24. A mating recess 32 is formed, and is integrally provided at two locations diametrically separated on the tool spindle 20, and a key 36 protruding from the tip end surface 34 of the tool spindle 20 can be engaged with the tool spindle 20. Mating part 1
2 also includes the tapered fitting portion 25 having a tapered outer peripheral surface 40 whose diameter is gradually reduced toward the rear end. When the valve seat machining tool device is attached to the tool spindle 20, the taper fitting portion 25 is inserted into the taper hole 46 formed in the tool spindle 20 with the key 36 and the engagement recess 32 in phase with each other. Further, a pull bar (not shown) provided in the tool spindle 20 is engaged with a pull stud (not shown) that is concentrically and integrally provided with the taper fitting portion 25. Is retracted, the rear end surface 30 that is a surface orthogonal to the axial direction of the fitting portion 12 abuts on the tip end surface 34 of the tool spindle 20, and the taper outer peripheral surface 40 of the taper fitting portion 25 becomes a tapered hole 46. The valve seat machining tool device is tightly fitted to the inner peripheral surface of the taper, is positioned coaxially with the tool spindle 20 in the axial direction, and is accurately held. If the tool spindle 20 is rotated by a drive source (not shown) while the tool seat 20 is held by the tool spindle 20, the side surface of the key 36 and the side surface of the engagement recess 32 are engaged with each other to cause the tool spindle 20 to rotate. Is transmitted to the apparatus main body 10, and the apparatus main body 10 is rotated around the axis.

The tool holding portion 14 of the apparatus body 10 holds a cutting tool, which is a type of processing tool. Specifically, a plurality of tool holding holes are formed in parallel with each other in the axial direction at different phases. In the case of the present embodiment, three tool holding holes 60 are formed in phases that are equally spaced from each other, and as shown in FIG.
The shank which is the rear end of 6, 67, 68 is fitted. As shown in FIG. 1, a plurality of female screw holes 72 are formed in the tool holding portion 14 so as to extend in the radial direction, and communicate with the three tool holding holes 60, respectively. Adjustment screws 76 are screwed into the female screw holes 72. The tip portion of the adjusting screw 76 is a taper portion 80 having a taper outer peripheral surface whose diameter is gradually reduced toward the tip side.
Are projected into the tool holding hole 60 and engaged with the inclined surface 84 formed on the rear end surface of the shank of the cutting tool 68. By adjusting the amount of protrusion into the tool holding hole 60 by rotating the adjusting screw 76, the axial position of the cutting tool 68 is adjusted by the effect of the slope of the tapered outer peripheral surface of the taper portion 80 and the inclined surface 84. The position of the cutting edge of the blade provided at the tip of the cutting tool 68 is adjusted in the axial direction. As shown in FIG. 2, each tool holding hole 60 is formed such that the cutting edge positions of the cutting edges of the three cutting tools 68 in the radial direction are displaced from each other. Valve seat 86 by these bites 68
The three sheet inner peripheral surfaces 87, 88, 89 (shown by the chain double-dashed line in FIG. 1) that are adjacent to each other in the axial direction and have different tapers from each other are machined. After the blade tip position of the blade is adjusted, the clamp screw 90 is tightened, so that each bite 68 is fixed to the apparatus main body 10. The bite is a shank as a tool holding member,
The throw-away tip as a cutting tool may be configured separately.

A stepped center hole 100 penetrating in the axial direction is formed on the central axis of the apparatus body 10. The sleeve 1 is inserted into the center hole 100 from the front end side of the device body 10.
02 is inserted. The sleeve 102 is prevented from slipping out of the apparatus main body 10 and relative rotation by an appropriate fixing device such as a positioning bolt. Sleeve 102
A reamer 106 as a processing tool is inserted through the.
The reamer 106 is held in the apparatus body 10 so as to be capable of reciprocating in the axial direction, and when it is rotated together with the apparatus body 10, the reamer 106 holds the valve stem slidably (two points in FIG. 1). The inner peripheral surface of the stem hole 112 (shown by the chain line) is finished.

The reamer 106 is a collet chuck 122 concentrically arranged in the housing portion 11 of the apparatus body 10.
It is detachably held by. Collet chuck 12
Reference numeral 2 is a main body 124, a collet 132 fitted in a collet fitting hole 130 formed in the main body 124 so as not to rotate and movable in the axial direction, and a drive device for moving the collet 132 forward and backward in the axial direction. Collet operation screw 134
It has and. The collet operation screw 134 is the main body 12
4 is rotatably held and is screwed into a female screw hole 135 provided at the base end of the collet 132. The collet fitting hole 130 has a tapered inner peripheral surface 136 whose diameter is gradually increased toward the end surface on the opening side, and is taper-fitted to the tapered outer peripheral surface 138 of the collet 132. Inside the collet 132, a reamer fitting hole 140 that extends in the axial direction and in which the reamer 106 can be fitted is formed. The collet 132 is formed with a plurality of slit grooves extending parallel to the axial direction, and can be reduced in diameter and expanded in diameter. Reamer 106
When the collet 132 is held by the collet 132, the collet operating screw 13 with the base end portion of the reamer 106 opposite to the processed portion is inserted into the reamer fitting hole 140 of the collet 132.
When the collet 132 is retracted in the axial direction by engaging a tool in the hexagonal hole of No. 4 and rotating in the positive direction, the collet 132 is tapered by the tapered inner peripheral surface 136 of the collet fitting hole 130.
The tapered outer peripheral surface 138 of the reamer 106 is pressed and reduced in diameter, so that the base end portion of the reamer 106 is collet chuck 122.
Held in. When the collet operating screw 134 is rotated in the opposite direction, the collet 132 is expanded and the reamer 10
6 is released. In the present embodiment, the collet 13
2 functions as a tool holding member.

The collet chuck 122 holding the reamer 106 is reciprocated on the central axis of the apparatus main body 10 in a direction parallel to the central axis by a hydraulic cylinder 150 which is a kind of hydraulic actuator. Hydraulic cylinder 15
Reference numeral 0 is provided with a cylinder bore 152 formed in the housing portion 11 of the apparatus main body 10, and a piston 154 as a movable element fitted in the cylinder bore 152 in a liquid-tight manner and slidably. A stepped bottomed hole 160 is formed in the center of the housing portion 11 of the apparatus body 10. A hollow stepped cylindrical member 166 having a large diameter portion 162 and a small diameter portion 164 is fitted in the bottomed hole 160 in a liquid-tight manner and fixed to the housing portion 11. The large diameter portion 162 and the small diameter portion 164 have a large diameter portion and a small diameter portion on both the outer peripheral surface and the inner peripheral surface. The inner peripheral surface of the small diameter portion 164 of the stepped cylindrical member 166 is a straight inner peripheral surface having a constant diameter, and the inner space surrounded by this inner peripheral surface and the bottom surface of the bottomed hole 160 constitutes the cylinder bore 152. The piston 154 is slidably fitted. The body 124 of the collet chuck 122 is formed integrally with the piston rod 170 of the hydraulic cylinder 150, and the piston rod 170 transmits the movement of the piston 154 as a mover to the collet 132 as a tool holding member. Functions as a device.

In the cylinder bore 152, the piston 15
A pair of hydraulic chambers 174 and 176 are formed on both sides of the No. 4 cylinder. The hydraulic fluid is supplied to the hydraulic chamber (head chamber) 174 on the rear end side of the apparatus main body 10 which is one of the hydraulic chambers 174 and 176 from the supply passage 180 which is a liquid passage.
The hydraulic chamber on the tip side (rod-side chamber) 17 which is the other hydraulic chamber
The hydraulic fluid is allowed to flow out of the fluid passage 6 through the discharge passage 182 which is a liquid passage. The pressurized hydraulic fluid is supplied to one of the hydraulic chambers 174 and 176, and the other hydraulic chamber 17
When the hydraulic fluid flows out of the nozzles 4 and 176, the piston 154 is moved forward and backward, whereby the collet chuck 122 and the reamer 106 are moved forward and backward. The forward end position of the piston 154 is the stepped cylindrical member 1
The end surface 184 fixed to the central axis of the cover 183 fixed to 66 is defined, and the retracted end position of the piston 154 is defined by the bottom surface 186 of the bottomed hole 160. FIG. 1 shows the piston 154 in the retracted end position. The stepped cylindrical member 166 and the cover 18
Reference numeral 3 is fixed to the housing portion 11, and the three members jointly form a housing of the hydraulic cylinder 150. The supply passage 180 is connected to a working liquid supply passage 188 formed inside the portion corresponding to the fitting portion 12 of the central hole 100 formed so as to penetrate in parallel with the central axis of the apparatus main body 10 and is pressurized. Processing fluid is supplied.
It can be considered that the working fluid supply passage 188 itself also functions as the supply passage 180 to the hydraulic cylinder 150.

The apparatus main body 10 is provided with a hydraulic fluid storage device for storing the hydraulic fluid discharged through the discharge passage 182. The hydraulic fluid accommodating device in the present embodiment is connected to the hydraulic chamber 176 by the discharge passage 182, and the hydraulic chamber 176 is connected to the hydraulic chamber 176.
It is configured by a pressure accumulator 214 that stores the hydraulic fluid discharged from the under pressure. The pressure accumulator 214 includes a cylinder bore 220 formed in the housing portion 11 of the apparatus body 10,
A piston 222 that is fluid-tightly and slidably fitted into the cylinder bore 220, a variable volume chamber 224 that is formed on one side of the piston 222 and is connected to the hydraulic chamber 176 by a discharge passage 182, and a variable volume chamber 224. And a biasing device that biases the piston 222 in a direction in which the volume decreases. The urging device is composed of a plurality of sets of compression coil springs 226, which is a type of spring member.
The pressure accumulator 214 in the present embodiment is a piston type pressure accumulator. The cylinder bore 220 of the pressure accumulator 214 and the cylinder bore 152 of the hydraulic cylinder 150 are formed concentrically with each other, and the hydraulic cylinder 150 and the pressure accumulator 21 are formed.
Both 4 and 4 are axisymmetric with respect to the central axis of the apparatus body 10. Specifically, an annular space is formed between the inner peripheral surface of the bottomed hole 160 and the outer peripheral surface of the small diameter portion 162 of the stepped cylindrical member 166, and the annular space defines the cylinder bore 220. In this space, a piston 222 having a through hole 230 in the central portion and having a generally cylindrical shape with a hole is fitted in a liquid-tight and slidable manner. Then, the hydraulic cylinder 1 is placed in the through hole 230 of the piston 222.
50 is provided. The compression coil springs 226 are arranged between a plurality of locations (for example, eight locations) spaced apart from each other in the circumferential direction of the piston 222 and the bottom surface of the bottomed hole 160 of the housing portion 11. An engagement groove 234 that extends in the axial direction is formed on the outer peripheral surface of the piston 222, and the engagement groove 234 is provided in the housing portion 11 and the cylinder bore 2
20 of the engaging member 236 projecting into the engaging groove 23
By engaging with No. 4, rotation of the piston 222 inside the housing portion 11 is blocked, and movement in the axial direction is guided.

The hydraulic cylinder 150 constitutes a first hydraulic cylinder including a cylinder bore 152 as a first cylinder bore and a piston 154 which is a first piston.
Further, the cylinder bore 220 constitutes a second cylinder bore, and the piston 222 constitutes a second piston.

The housing portion 11 of the apparatus body 10 is provided with an inlet 240 for injecting hydraulic fluid into the variable volume chamber 224. In the case of the present embodiment, the injection ports 240 are provided at a plurality of places (for example, two places). The inlet 240 is normally closed by a closing member 242. A visual confirmation hole 250 is also formed in the housing portion 11. This visual confirmation hole 250 can confirm the amount of hydraulic fluid flowing into the variable volume chamber 224 by visually confirming the position of the rear end of the piston 222 (the end portion on the bottom surface side of the bottomed hole 160). Is.

As shown in FIG. 3, a stopper 260 is disposed on the large diameter portion 162 of the stepped cylindrical member 166 so as to be movable in the axial direction. The stopper 260 is slidably fitted in a fitting hole 262 extending in the axial direction of the stepped cylindrical member 166, and the tip end surface of the stopper 260 faces the variable volume chamber 224. An adjusting screw 266 is provided behind the stopper 260, and is screwed into a female screw hole 268 formed in the fixed cover 183 in the large diameter portion 162 so as to abut against the stopper 260. Stopper 260
Is normally arranged at a position where it does not project into the variable volume chamber 224. However, when injecting hydraulic fluid into the variable volume chamber 224, the adjusting screw 266 is rotated to move the tip end surface of the stopper 260 to the variable volume. The piston 222 is compressed by the compression coil spring 226 by projecting it toward the chamber 224 side.
Of the variable volume chamber 224 side is defined. In this way, the minimum volume of the pressure accumulator 214 is defined, and the hydraulic fluid in the variable volume chamber 224 is not pressurized. Therefore,
When the hydraulic fluid is injected into the variable volume chamber 224, the blocking member 24
Even if the inlet 240 is opened by removing 2, the hydraulic fluid will not be ejected to the outside, and the hydraulic fluid can be easily supplied to the variable volume chamber 224 and the hydraulic cylinder 150 and the inlet 240 can be closed. You can Note that the stopper 260 and the adjusting screw 266 may be configured as an integral member.

In the middle of the discharge passage 182, the hydraulic chamber 1
Throttling device 280 that regulates the outflow rate of hydraulic fluid from 76
Is provided. Therefore, the operating speed of the hydraulic cylinder 150 is restricted, and by extension, the collet chuck 122 is
Further, the moving speed of the reamer 106 in the direction of protruding from the apparatus body 10 (forward direction) is restricted. Aperture device 280
Is a variable throttle device having a variable flow passage area and includes a variable throttle valve 282. Variable throttle valve 2 in the present embodiment
Reference numeral 82 is a manual variable throttle valve that includes a movable valve element 284 that is movable according to a manual operation, and the flow passage area of the discharge passage 182 can be changed by moving the movable valve element 284. Specifically, the adjusting screw 28 provided integrally with the movable valve 284.
A hexagonal hole (not shown) formed in the rear end face of 6 is engaged with a tool (not shown) to rotate the adjusting screw 286, whereby the amount of protrusion of the movable valve element 284 from the housing portion 11 is adjusted, As a result, the gap formed between the movable valve element 284 and the valve seat provided on the stepped cylindrical member 166, that is, the flow passage area of the discharge passage 182 is changed. The tip of the movable valve element 284 has a tapered shape whose diameter is gradually reduced toward the tip side, and the valve seat is formed by the opening peripheral edge of the discharge passage 182. It is desirable that a tapered surface be formed on the periphery of the opening. Movable valve 284
After adjusting the amount of protrusion or the gap between the valve seat and the valve seat, the clamp screw 288 provided in the housing portion 11 is tightened to fix the movable valve element 284.
By appropriately changing the throttle amount of the variable throttle valve 282 as described above, the moving speed of the reamer 106 in the positive direction can be set to a speed suitable for machining.

The discharge passage 182 also includes the housing portion 1.
A check valve 300 is provided in parallel with the throttle device 280 of No. 1 in parallel with the throttle device 280.
Inflow of hydraulic fluid into 6 is permitted, but outflow is blocked. The check valve 300 is a compression coil spring 30 that is a kind of spring member that is a biasing device that biases the valve element 302, the valve seat 304, and the valve element 302 in the direction to be seated on the valve seat 304.
6 is provided.

Processing of the valve seat 86 by the valve seat processing tool device configured as described above will be described. First, while holding the apparatus main body 10 on a dedicated workbench, the cutting tools 66, 67, 68 and the reamer 106 are attached. Tool holders 60 for tool holders 66, 67, 68
The tool 66, 6 by rotating the adjusting screw 76
Adjust the axial position of the 7, 68 cutting edge. Also,
A hollow cylindrical tubular member is inserted from the rear end side of the supply hole 180 of the central hole 100, and the piston 154 of the hydraulic cylinder 150 is pushed from the rear by the tubular member to advance to the forward end position. In this state, the reamer 106 is inserted into the sleeve 102, and the reamer 106 is inserted into the collet chuck 12
It is fitted into the reamer fitting hole 140 of No. 2. Then, by inserting a hexagonal wrench as a tool through the insertion hole of the tubular member and engaging the collet operating screw 134 to rotate the collet 132 in the direction of reducing the diameter, the rear end of the reamer 106 is fixed to the collet chuck 122. Hold it. After the work of attaching the cutting tools 66, 67, 68 and the reamer 106, the valve seat machining tool device is attached to the tool spindle 20.

After the preparation is completed as described above, the inner peripheral surfaces 87, 88, 89 of the valve seat 86 are cut by rotating the tool spindle 20 and the cutting tools 66, 67, 68, and the hydraulic cylinder 150. Is operated to move the piston 154 forward so that the reamer 106 cuts the inner peripheral surface of the stem hole 112 of the valve guide 110. The processing of the tapered inner peripheral surface of the valve seat 86 and the processing of the stem hole 112 may be performed simultaneously in parallel, or may be performed alternately. In this manner, the seat inner peripheral surfaces 87, 88, 89 of the valve seat 86 and the machining of the stem hole 112 are processed in parallel or continuously while the valve seat 86 and the valve seat machining tool device are positioned relative to each other. Therefore, the concentricity between the valve seat 86 and the stem hole 112 is secured. According to this valve seat processing tool device, the inner peripheral surface of the valve seat 86 and the stem hole 112 can be processed by the same device, a plurality of processing machines can be provided, and the tool spindle 20 can be replaced with a tool for each processing. There is no need, the equipment cost can be reduced, and the processing efficiency can be improved. Further, the forward speed of the piston 154 of the hydraulic cylinder 150 is regulated by the variable throttle valve 282 to a speed suitable for reaming, and the stem hole 112 can be accurately processed. The advancing speed of the piston 154 is regulated as described above, but when the reamer 106 is retracted after the processing by the reamer 106 is completed, the hydraulic chamber 1 passes through the supply passage 180.
By allowing the hydraulic fluid of 74 to flow out, the hydraulic fluid stored in the variable volume chamber 224 in a pressurized state flows into the hydraulic chamber 176 through the discharge passage 182 and the check valve 300. Then, the reamer 106 is quickly returned to the inside of the apparatus main body 10.

As the machining tool device attachable to the machining machine, various devices other than the valve seat machining tool device of the above-described embodiment can be adopted. As examples of other embodiments of the machining tool device, two forms of the machine tool device will be described below. However,
Portions that function in the same manner as the constituent elements described in the above-described embodiment (for example, the hydraulic cylinder 150 and the pressure accumulator 214) are given the same reference numerals and detailed description thereof will be omitted.

The machining tool device in the embodiments shown in FIGS. 4 and 5 is a tool device suitable for cutting the tapered inner peripheral surface 390 of the workpiece. The cutting tool 400 as a cutting tool, which is a type of processing tool of the present embodiment,
It is held by a slider 402 that functions as a tool holding member. The slider 402 is held by a tool holding unit 404, which is a component of the apparatus body 10, so as to be movable in a direction inclined with respect to the central axis of the apparatus body 10. The slider 402 is connected to the piston 154 of the hydraulic cylinder 150 by a motion transmission device described later.

The tool holding portion 404 is formed with an inclined groove 410 inclined with respect to the central axis of the apparatus main body 10 and an axial groove 412 extending from the inclined groove 410 in parallel with the axial direction. The slider 402 includes an inclined portion 420 fitted in the inclined groove 410 and an axial portion 422 fitted in the axial groove 412. The axial direction portion 422 of the slider 402 has a tool holding hole 42 that extends axially from the front end surface.
6 is formed and the shank of the bite 400 is fitted. An inclined surface 430 is formed on the rear end surface of the shank of the cutting tool 400, while the axial portion 4 of the slider 402 is formed.
22 includes tool holding holes 4 extending in a direction orthogonal to the axial direction.
A female screw hole 432 that communicates with 26 is formed, and an adjusting screw 434 is screwed into the female screw hole 432. The tip of the adjusting screw 434 has a tapered surface 4 corresponding to the inclined surface 430 of the cutting tool 400.
36 is formed. By rotating the adjusting screw 434 and changing the position of the tapered surface 436, the axial position of the cutting tool 400 is changed, and the position of the cutting edge of the cutting edge of the cutting tool provided at the tip of the cutting tool 400 can be adjusted. It is possible.

As shown in FIG. 6, the inclined groove 410 has an inverted T-shaped cross section, and the inclined portion 420 of the slider 402.
Also, by forming an inverted T-shaped cross section corresponding to this, the slider 402 is prevented from slipping out in the thickness direction which is a direction orthogonal to the longitudinal direction and the width direction of the inclined groove 410. It should be noted that the inclined groove 410 is actually formed by assembling a plurality of members and has an inverted T-shaped cross section due to the inner surfaces of the members.
It is shaped like a letter. Inclined portion 420 of slider 402
Is the bottom surface 442 of the inclined groove 410 by the pressing device 440.
Is urged in a direction away from the bottom surface 44 of the inclined groove 410.
2, the slider 402 is stably held in the inclined groove 410, and rattling at the time of sliding is prevented.

The pressing device 440 will be described with reference to FIGS. 6 and 7. The holding recess 44 that holds the wedge member 446 is provided on the bottom surface 442 side of the inclined portion 420 of the slider 402.
8 are formed at two locations separated in the longitudinal direction. The holding recess 448 has a depth linearly reduced from one side surface in the width direction of the inclined portion 420 toward the other side surface,
That is, the bottom surface of the holding recess 448 is an inclined surface 450 that is inclined toward the bottom surface 442. A wedge member 446 is fitted in each holding recess 448 so as to be movable in the width direction of the inclined portion 420 and immovable in the longitudinal direction. The wedge member 446 has a shape in which the thickness changes in the width direction of the inclined portion 420 and is parallel to the bottom surface 442.
52 and an upper surface 454 parallel to the inclined surface 450. The wedge member 446 is formed with a plurality of bottomed holding holes 456 that are open on the side surface on the thick side and extend in the width direction. A compression coil spring 458 as a spring member, which is a kind of biasing device, is arranged in each holding hole 456. A spring receiver 460 for receiving the compression coil spring 458 is fixedly provided at a position facing the side surface of the inclined portion 420 where the holding hole 456 is opened. The spring receiver 460 is a plate-shaped member that is a separate member from the inclined portion 420.
By being fixed to 20, it functions as an integral part of the inclined portion 420. The urging force of the compression coil spring 458 urges the wedge member 446 in a direction away from the spring receiver 460, and the wedge effect of the wedge member 446 pushes the inclined portion 420 in a direction away from the bottom surface 442, so that the shoulder of the inclined groove 410 is depressed. Pressed against surface 444. The wedge member 446, the inclined surface 450 of the holding recess 448, the compression coil spring 458, the spring receiver 460, and the like constitute the pressing device 440.

As shown in FIG. 4, a fitting hole 470 penetrating in the thickness direction is formed in the inclined portion 420 of the slider 402, and the fitting portion 4 integrally provided on the plunger 472 is formed.
74 is fitted. The plunger 472 is connected to the piston rod 170 of the hydraulic cylinder 150 by a bolt 478 as a fixing device such that the plunger 472 cannot move relatively and cannot rotate relative to the inside, and inside the guide hole 480 formed in the tool holding portion 404 of the device body 10. Can be moved in the axial direction. A key groove 482 extending in the axial direction is formed on the inner peripheral surface of the guide hole 480, while a key portion 484 is integrally provided on the outer peripheral surface of the plunger 472, and inside the guide hole 480 of the plunger 472. Is prevented from rotating. The key portion 484 is formed integrally with the fitting portion 474, and the key portion 484 also functions as an attachment portion for attaching the fitting portion 474 to the plunger 472. An elongated hole 486 that extends in the longitudinal direction of the inclined groove 410 and communicates with the guide hole 480 is formed on the bottom surface of the inclined groove 410, and the base end of the fitting portion 474 moves in the elongated hole 486 in the longitudinal direction. Mating is possible.

Therefore, the plunger 472 is slid in the guide hole 480 by the hydraulic cylinder 150 in the axial direction, so that the outer surface of the fitting portion 474 and the fitting hole 470.
With the inner surface of the fitting engaged with the fitting portion 474,
You can move inside. Inclined portion 420 of slider 402
Is fitted in the slanted groove 410 so as to be movable only in the longitudinal direction thereof, the slider 40 can be moved by the effect (or cam action) of the inclined surface between the fitting portion 474 and the fitting hole 470.
2 is moved along the inclined groove 410. By defining the forward and backward limits of the piston 154 of the hydraulic cylinder 150 as described in the above embodiment, the moving limit of the slider 402 is defined. Note that FIG. 4 shows a state in which the piston 154 is at the forward end position.
By sliding the slider 402 along the inclined groove 410, the bite 400 held by the axial portion 422 of the slider 402 is moved integrally with the slider 402. As a result, the tapered inner peripheral surface 390 is cut by the cutting edge of the cutting tool 400. The inclination angle of the tapered inner peripheral surface 390 is determined by the inclination angle of the inclined groove 410. Similar to the above embodiment, the apparatus body 10 includes a hydraulic cylinder 150, a pressure accumulator 214, a variable throttle valve 282, and a check valve 30.
Since 0 is provided, the moving speed of the slider 402 and the cutting tool 400 in the positive direction (direction approaching the rotation axis of the machining tool device) is regulated by the variable throttle valve 282 to a speed suitable for machining. The inner peripheral surface 390 of the taper can be satisfactorily cut. Further, the slider 402 and the cutting tool 400 are quickly returned in the opposite direction. In this embodiment, the plunger 472 functions as a driving member of the slider 402, and the inclined groove 410,
The fitting hole 470, the fitting portion 474, the elongated hole 486, and the like constitute a motion conversion device that converts the motion of the plunger 472 into the motion along the inclined groove 410 of the slider 402.

The housing portion 11 of the apparatus main body 10, the piston 154, the piston rod 170, the plunger 472,
Machining liquid supply passage 4 penetrating the center of the tool holder 404
90 is formed, is connected to the machining fluid supply passage 188, and the machining fluid is supplied from this passage when machining the tapered inner peripheral surface 390. Since the machining fluid supply passage 490 has a relatively small flow passage area, it has a throttling effect. Therefore, the pressurized machining fluid supplied from the machining fluid supply passage 188 is sufficiently supplied to the hydraulic cylinder 150 via the supply passage 180. Is supplied as hydraulic fluid having sufficient pressure to advance the piston 154. Further, the machining liquid supply passage 490 is branched in the middle and opened to the bottom surface of the axial groove 412, and the slider 402 is slid smoothly by the supply of the machining liquid. If a throttling device such as an orifice is provided somewhere in the fluid passage including the machining fluid supply passage 490 and the machining fluid supply passage 188, the pressure of the machining fluid supplied to the hydraulic cylinder 150 and the machining fluid supply passage 490 can be improved. The relationship with the flow rate of the working liquid supplied to the working unit via the above can be arbitrarily set. Further, the above-mentioned relationship can be changed by making the diaphragm device replaceable or adjustable.

The tool device for machining in the embodiment shown in FIGS. 8 and 9 is a tool device suitable for forming an annular groove on the inner peripheral surface of the hole of the workpiece. A chip 500 as a groove cutting tool, which is a type of processing tool of this embodiment, is detachably held by a mounting member 504 on a cylindrical holder 502 that functions as a tool holding member. The chip 500 of this embodiment forms an O-ring groove 508 for disposing an O-ring on the inner peripheral surface 506 of the hole 505 of the workpiece. The holder 502 is slidably held in a guide hole 512 of a tool holding unit 510, which is a component of the apparatus body 10, in a direction perpendicular to the central axis of the apparatus body 10. The holder 502 is connected to the piston 154 of the hydraulic cylinder 150 by a motion transmission device described later.
A motion transmitting member 520 is coaxially connected to the piston rod 170 of the hydraulic cylinder 150 by a bolt 518 as a fixing device. The motion transmitting member 520 is fitted in a guide hole 522 formed in the tool holding portion 510 so as to be slidable in the axial direction. A fitting portion 524, which projects in a direction inclined with respect to the central axis of the motion transmitting member 520, is integrally formed at the tip end of the motion transmitting member 520 opposite to the rear end thereof connected to the piston rod 170. It is provided in. A fitting hole 526 is formed in the holder 502 so as to penetrate the holder 502 in a direction inclined with respect to the central axis of the holder 502 corresponding to the fitting portion 524. The fitting portion 524 and the fitting hole 526 both have a rectangular cross section. Motion transmission member 520, fitting portion 524 and fitting hole 5
26 constitutes the motion transmitting device.

Piston 154 and motion transmitting member 520
Is moved forward, the outer surface of the fitting portion 524 and the fitting hole 5
Due to the effect of the slope (or the cam action) due to the engagement with the inner surface of 26, the holder 502 is moved in the direction in which the cutting edge of the tip 500 projects to the outer peripheral side. On the contrary, when the piston 154 is retracted, the holder 502 causes the cutting edge of the tip 500 to move to the inner circumference due to the engagement of the outer surface and the inner surface of the fitting portion 524 and the fitting hole 526 on the opposite sides of the forward movement. It can be moved to the side.

In the present embodiment, the hydraulic cylinder 15
A hollow cylindrical spacer 530 is fitted on the outer peripheral surface of the piston rod 170 of No. 0, and is interposed between the cover 183 fixed to the stepped cylindrical member 166 and the piston 154. The end surface of the spacer 530 on the side facing the piston 154 functions as the defining surface 532.
The forward end position of 54 is defined. The end surface of the cover 183 is
It can be considered that it functions as a defining surface that defines the forward end position of the piston 154 via the spacer 530.
Change the axial length of the spacer 530, or
By removing the spacer 530, the stroke of the piston 154 of the hydraulic cylinder 150 can be variously changed. It is also possible to remove the motion transmitting member 520 from the piston rod 170 and change it to a different structure. By adopting at least one of these, a versatile machine to which various tools can be attached. A processing tool device is obtained.

The formation of the O-ring groove 508 by the machining tool device according to this embodiment will be described. With the piston 154 of the hydraulic cylinder 150 in the retracted end position, the tool spindle 20 holding this tool device is moved in the positive direction, and the tip 500 should form the O-ring groove 508 inside the hole 505. It is moved to a position facing the peripheral surface 506. In this state, the hydraulic cylinder 150 is operated and the piston 154 is moved forward, whereby the tip 500 is projected to the outer peripheral side. At the same time, the tool spindle 20 is rotated and the inner peripheral surface 506 is subjected to grooving by the cutting edge of the tip 500. As in the above-mentioned respective embodiments, the hydraulic cylinder 15 is attached to the apparatus main body 10.
0, the pressure accumulator 214, the variable throttle valve 282, and the check valve 300, the holder 502 and the tip 50.
The moving speed of 0 toward the outer peripheral side is regulated by the variable throttle valve 282 to a speed suitable for processing, so that the O-ring groove 508 can be favorably formed. Further, it is possible to promptly retract the chip 500 to the inner peripheral side after processing is completed.

In the embodiment shown in FIGS. 1 to 3 and the embodiment shown in FIGS. 8 and 9, the configuration shown in FIG.
As described in the embodiment shown in FIG. 7 to FIG. 7, a machining fluid supply passage that penetrates the center of the apparatus body 10 is formed, and this machining fluid supply passage 188 is connected and communicated with the machining fluid supply passage 188 to cut the machining tool during machining. The working liquid can be supplied to the vicinity of the blade.

Although some embodiments of the present invention have been described in detail above, these are merely examples, and the present invention is described in the above-mentioned [Problems to be solved by the invention, means for solving problems and effects]. Various modifications and improvements can be performed based on the knowledge of those skilled in the art, including the described embodiments.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a machining tool device according to an embodiment of the present invention.

FIG. 2 is a side view of the machining tool device.

FIG. 3 is an enlarged front sectional view showing a part of the machining tool device.

FIG. 4 is a front cross-sectional view showing a machining tool device according to another embodiment of the present invention.

FIG. 5 is a side view of the machining tool device.

FIG. 6 is a side sectional view showing a slider functioning as a tool holding member of the machining tool device.

FIG. 7 is an exploded perspective view of the slider.

FIG. 8 is a front sectional view showing a tool device for machining according to still another embodiment of the present invention.

FIG. 9 is a side sectional view of the machining tool device.

[Explanation of symbols]

10: device main body 11: housing part 20: tool spindle 24: held part 25: taper fitting part 40: taper outer peripheral surface 4
6: Tapered hole 66, 67, 68: Bit 86:
Valve seat 87, 88, 89: Seat inner peripheral surface
106: reamer 110: valve guide 112:
Stem hole 122: Collet chuck 150: Hydraulic cylinder 152: Cylinder bore 154: Piston 160: Bottomed hole 162: Large diameter part 164: Small diameter part 166: Stepped cylindrical member 174, 176: Hydraulic chamber
180: Supply passage 182: Discharge passage 188: Processing liquid supply passage 21
0: hydraulic fluid accommodating device 214: accumulator 220: cylinder bore 222:
Piston 224: Variable volume chamber 226: Compression coil spring 240: Inlet port 242: Closing member 260: Stopper 280: Throttling device 28
2: Variable throttle valve 284: Movable valve 300: Check valve 390: Taper inner peripheral surface 400: Bit 402: Slider
470: Fitting hole 472: Plunger 474: Fitting part 500: Chip 502: Holder 505: Hole 506: Inner peripheral surface 508: O-ring groove 520: Motion transmission member 524: Fitting part
526: Mating hole

Claims (9)

[Claims] 1. A device main body that is attached to and detached from a tool spindle of a machine tool, a tool holding member that is held by the device main body so as to be capable of relative movement and holds a processing tool, and a hydraulic pressure provided on the device main body. In a machining tool device including a hydraulic actuator that operates and a motion transmission device that transmits the motion of a mover of the hydraulic actuator to the tool holding member, the machining tool device is provided in the device body, and A supply passage for supplying the working fluid to one of the pair of hydraulic chambers formed on both sides of the mover and a discharge passage for allowing the working fluid to flow out from the other, and the other passage provided in the discharge passage. A machining tool device including a throttle device that regulates the outflow rate of hydraulic fluid from a pressure chamber. 2. The machining tool device according to claim 1, wherein the throttle device includes a variable throttle device having a variable flow passage area. 3. The check valve according to claim 1, wherein a check valve that allows the hydraulic fluid to flow into the other hydraulic chamber but prevents the hydraulic fluid from flowing out is provided in the discharge passage in parallel with the throttle device. Tooling equipment for machining. 4. A pressure accumulator provided in the main body of the apparatus, connected to the other hydraulic chamber by the discharge passage, and storing the hydraulic fluid discharged from the other hydraulic chamber under pressure. The tool device for machining according to any one of 1 to 3. 5. The hydraulic actuator includes a first cylinder bore formed in the main body of the apparatus, and a first piston as the mover, which is fluid-tightly and slidably fitted in the first cylinder bore. A first hydraulic cylinder, wherein the pressure accumulator is a second cylinder bore formed in the main body of the apparatus, a second piston fitted in the second cylinder bore in a liquid-tight and slidable manner, and a second piston thereof. A variable volume chamber formed on one side of the variable volume chamber and connected to the other hydraulic chamber by the discharge passage, and a biasing device that biases the second piston in a direction in which the volume of the variable volume chamber decreases. It is a piston type pressure accumulator, and the first cylinder bore and the second cylinder bore are formed concentrically with each other, and
The said piston type pressure accumulator has a through-hole in the center part, and has a substantially perforated cylindrical shape, The said 1st hydraulic cylinder is arrange | positioned inside the perforated cylindrical accumulator. Tooling equipment for machining. 6. The tool holding member is provided on the apparatus main body,
The machining tool device according to any one of claims 1 to 5, which is held so as to be movable in a direction parallel to the central axis of the device body. 7. The tool holding member is provided on the apparatus main body,
7. The machining tool device according to claim 1, which is held so as to be movable in a direction perpendicular to the central axis of the device body. 8. The tool holding member is provided on the apparatus main body,
The machining tool device according to any one of claims 1 to 7, which is held so as to be movable in a direction inclined with respect to a central axis of the device body. 9. The tool holding member is provided on the apparatus main body,
A device for holding a reamer for reaming a stem hole for slidably holding a valve stem of an engine, which is held so as to be movable in parallel with the central axis of the device body, and the device body. The machining tool device according to any one of claims 1 to 5, further comprising: a cutting tool that cuts a plurality of tapered inner peripheral surfaces having different tapers from each other to form a valve seat of the engine. .