JPH088054Y2 - Cutting agent supply device for turning machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cutting agent supply device for ejecting a cutting agent (coolant) to a tool cutting edge when turning the inner diameter of a workpiece.

[Conventional technology]

In turning, to prevent heat generation of the tool and to extend the life of the tool, cool the tool edge during machining, or discharge the chips from this tool from the cutting point. Spouting coolant is being done.

By the way, there are cases where the inner diameter of a cylindrical workpiece (pipe-shaped work) having a larger axial dimension than the diameter is turned. In such a case, the tool (inner diameter machining bite) is hidden inside the work, so that it is not possible to supply the coolant from the outer side of the work to the inner diameter machining bit blade edge as in normal machining. Therefore, a large number of cutting agent supply devices in such cases have been proposed and implemented.

For example, as shown in FIG. 4, a pipe 52 for ejecting a coolant from the tool rest 50 side to the inner diameter machining bit blade tip inside the work W is provided, and a cutting agent for ejecting the coolant aiming at the blade tip from the pipe 52. The feeding device is implemented.

Further, as another conventional example, as shown in FIG. 5, a cutting agent supply device is provided in which a hole 51a through which a coolant is passed is bored in an inner diameter machining bit 51 'and the coolant is ejected to the tool cutting edge through the hole 51a. ing.

In FIGS. 4 and 5, 53 is a chuck for fixing the work W, and 54 is a main shaft for rotating the chuck 53 and the work W.

[Problems to be solved by the device]

However, the conventional cutting agent supply device has the following problems. That is, in the cutting agent supply device for ejecting the coolant from the pipe 52 from the tool rest 50 shown in FIG.
Moreover, since the coolant is jetted from the pipe 52 fixed to the tool post 50 to the cutting edge of the inner diameter processing tool 51,
It is difficult to reliably supply the coolant to the inner diameter portion of the work W and to the inner diameter machining bit 51 cutting edge, and there is a drawback that the inner diameter machining bit 51 blade edge cannot be cooled sufficiently. Further, since the coolant is ejected from the tool rest 50 side toward the inner diameter portion of the work W, the chips CB are also accumulated on the chuck 53 side (spindle 54 side) of the inner diameter portion of the work W.

Further, the cutting agent supply device for forming the cutting agent supply hole 51a in the inner diameter processing tool 51 'shown in FIG. 5 has a complicated inner diameter processing tool 51 having a cutting agent supply hole 51a for flowing the coolant. ′ Must be specially manufactured, a special internal tool bit 50 ′ that can set the special internal diameter processing tool 51 ′ and supply coolant through the cutting agent supply hole 51a of the internal diameter processing tool Also had to be specially made.

The cutting agent supply device of the present invention was created in view of the above problems, and the purpose thereof is to change the inner diameter machining tool and the tool rest without producing a special inner diameter machining tool and the tool rest, and to use the coolant. It is an object of the present invention to provide a cutting agent supply device for a turning machine, which is surely supplied to an inner diameter processing bite cutting edge and can easily cool the inner diameter processing bite cutting edge and easily discharge chips.

[Means for solving the problem]

In order to solve the above-mentioned problems, a cutting agent supply device for a turning machine according to the present invention comprises a spindle that is rotatably supported by a headstock, and a gripping device that is provided at the front end of the spindle and that grips a workpiece. And a tool rest located at a position facing the main shaft and movably controlled in a main shaft axis direction or a direction orthogonal to the main shaft relative to the main shaft, and detachably attached to the main tool shaft, In a turning machine comprising a tool for processing the workpiece, a cutting agent supply which is provided so as to penetrate through the main spindle, is capable of advancing and retreating in the axial direction of the main spindle, and ejects a cutting agent to the cutting edge of the tool. A member, a supply member drive device for moving the cutting agent supply member in the spindle axis direction, and the supply member driving device for synchronously moving the cutting agent supply member in accordance with the movement position of the tool rest in the spindle axis direction. And a supply member control device for controlling the above, and is configured to eject the cutting agent to the cutting edge of the tool while moving in synchronization with the cutting edge of the tool.

[Action]

When machining the inner diameter of a pipe-shaped workpiece, the cutting agent supply member (coolant pipe) moves in the Z-axis direction in synchronization with the movement of the tool post Z-axis movement position in the spindle axis direction (Z-axis direction) of the tool. The supply member driving device for controlling the above is controlled by the supply member synchronizing device so that the distance between the cutting edge of the tool and the nozzle at the tip of the coolant pipe is always kept constant. If this cutting agent supply device is used, the coolant is reliably supplied to the tool cutting edge and the coolant is ejected from the spindle side, so that no chips are collected on the spindle side of the work.

〔Example〕

An embodiment of a cutting agent supply device for a turning machine according to the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic explanatory view of a turning machine equipped with a cutting agent supply device according to an embodiment of the present invention.

In the figure, W is a pipe-shaped work, 1 is a work W
A chuck for gripping the workpiece 2, a spindle for rotating the workpiece W together with the chuck 1, a spindle head for rotatably supporting the spindle 2, and a spindle stock for accommodating gears for achieving a predetermined rotation speed, and 4 for the chuck. A chuck cylinder for opening and closing, 5 a rotary valve for supplying pressure oil to the chuck cylinder 4, 6 a cutting agent supply member (coolant pipe) for supplying a cutting agent (coolant), and 7 for driving a coolant pipe. A servo motor 8 is a pipe support device provided to fix the servo motor 7 for driving the coolant pipe and to support the coolant pipe 6.

Further, 9 is an inner diameter processing tool for processing the inner diameter portion of the work W, 10 is a tool post for mounting the inner diameter processing tool 9, etc., 11 is a tool tool for moving the tool stand 10 in the spindle axis direction (Z axis direction) A Z-axis servomotor for the platform, and 12 is a Z-axis ball screw. The Z-axis ball screw 12 is connected to the turret Z-axis servomotor 11, and a nut (not shown) is fixed to the turret 10, so that the turret 10 is driven by the drive of the turret Z-axis servomotor 11. It is controlled to the movement position in the Z-axis direction, and the inner diameter of the workpiece W is machined in the Z-axis direction by the inner diameter machining tool 9.

The feed control in the direction (X-axis direction) orthogonal to the spindle axis of the tool post 10 is similar to the feed control in the Z-axis direction, and the tool post X-axis servo motor 13 and X-axis ball screw 14 are provided. There is. Machining is performed by rotating the workpiece W fixed to the spindle 2 and moving the inner diameter machining bit 9 by a predetermined amount in the X-axis direction and the Z-axis direction based on the machining program.

FIG. 2 is a detailed cross-sectional view of the coolant pipe moving mechanism.

In the figure, the coolant pipe 6 has a nozzle 6a at the tip.
Has a connection joint 6b with a rubber hose RUB at the rear end, and the coolant pumped from a coolant pump (not shown) through the rubber hose RUB passes through the inside of the coolant pipe 6 to the inner diameter machining bit 9 inside the workpiece W from the nozzle 6a. Erupted.

Further, a rack is processed at the rear portion of the coolant pipe 6 to form a rack portion 6c. The rack portion 6c and the pinion 7a provided on the shaft portion of the coolant pipe driving servomotor 7 are arranged in the pipe supporting device 8 so as to mesh with each other.

Further, a hole for a coolant pipe 6 is bored in the spindle 2 and the chuck cylinder 4, and the coolant pipe 6 is inserted into the hole to be provided on the spindle 2 side, the chuck cylinder 4 and the pipe support device 8 side. It is movably supported via bearings B ₁ , B ₂ , and B ₃ . And the rack
The coolant pipe 6 can be moved by the pinion mechanism.

FIG. 3 is a block diagram of a control device that implements this cutting agent supply device.

In the figure, 21 is a processor (CPU), 22 is a ROM that stores a control program, and 23 is an RA that stores parameters and the like.
M and 24 are machining program files that store various machining programs, 25 is a clock, 26 is an operation panel composed of a graphic display device (CRT) 26a and a keyboard 26b, and 27 is an interface (I / O).

28 is a position control circuit for D / A converting the command pulse train corresponding to the moving amount and moving speed of the inner diameter machining tool in the Z-axis direction, and the position control circuit for controlling the position. An amplifier section for controlling
31 is a position control circuit for transmitting the output obtained by D / A converting the command pulse train corresponding to the moving amount and moving speed of the coolant pipe 6, and for controlling the moving position, 32 is for amplifying the output and controlling the speed It is an amplifier section.

In FIG. 3, TG is a speed detector such as a tacho generator and PG is a position detector such as a pulse generator. The coolant pipe driving servomotor 7 and the tool rest Z are shown.
The tool post 10 is sent by the command sent to the axis servo motor 11.
Also, the moving amount and moving speed of the coolant pipe 6 are detected and fed back to the position control circuits 28, 31 and the amplifier units 29, 32 to control the position and speed.

The synchronization circuit 30 has the following functions. That is, the command pulse sent from the position control circuit 28 drives the turret Z-axis servomotor 11 to move the turret 10 by a predetermined amount in the Z-axis direction, but in synchronism with this movement, exactly the same. It is a circuit that can send a command pulse to the position control circuit 32 to control the coolant pipe driving servomotor 7 so that the coolant pipe 6 can be moved by the movement amount.

Next, the operation of the cutting agent supply device of the turning machine of the present invention will be described in detail.

The operator uses the operation panel 26 to select a predetermined machining program and commands execution of turning.

Then, the processor 21 reads the corresponding machining program from the machining program file 24, and the machining program is a command for synchronizing the Z-axis drive of the tool rest 10 and the drive of the coolant pipe 6 because the machining program is for machining the inner diameter of the pipe shape. It is determined whether or not the M command is in the program, and if there is the M command, synchronous movement is performed. On the other hand, if there is no M command, synchronous movement is not performed.

When the machining program is read, the position control circuit 28 sends a command pulse corresponding to the movement amount and the movement speed to the turret Z-axis servomotor 11 via the amplifier 29 to drive it, based on the machining program. When the tool rest Z-axis servomotor 11 is driven, the tool rest 10 moves in the Z-axis direction via the Z-axis ball screw 12. This controls the feed of the cutting tool 9 in the Z-axis direction. When the tool post Z-axis servomotor 11 is driven, the speed detector TG and the position detector PG perform predetermined feedback control.

By the way, when the synchronizing circuit 30 operates and the tool moves to the approach position, the processor 21 determines from the RAM (parameter) 23 that the set distance between the inner diameter machining tool cutting edge and the coolant nozzle and the current position of the tool rest in the Z-axis direction. , RAM (tool offset) 23 is used to read the tool offset amount of the tool currently in use, and the coolant pipe 6 is driven and positioned by the coolant pipe driving servomotor 7. afterwards,
When the tool rest 10 moves in the Z-axis direction, a command pulse corresponding to the amount of movement in the Z-axis direction commanded by the position control circuit 28 is sent to the position control circuit 31 of the coolant pipe 6 via the synchronizing circuit 30, and further. The servomotor 7 for driving the coolant pipe is driven via the amplifier 32. Then the rack
Due to the pinion mechanism, the coolant pipe 6 slides in the Z-axis direction by the amount of movement of the tool rest 10. This synchronization circuit 30
As a result, the positional relationship between the nozzle 6a at the tip of the coolant pipe 6 and the tip of the inner diameter processing bite 9 is always maintained at the set distance.

Further, since the coolant is ejected from the nozzle 6a at the tip of the coolant pipe 6, the coolant can always be supplied to the tip of the cutting tool 9 at the same position and under the same conditions.

The supply member driving device is not limited to that of the above embodiment, and a screw driving method, a friction driving method, or a direct connection method with a driving body may be used. Further, the drive source is not limited to that of the above-mentioned embodiment, but a hydraulic drive body (hydraulic cylinder, hydraulic motor).
Alternatively, a pneumatic driver (a pneumatic cylinder, a pneumatic motor) and a detector such as a linear scale or an encoder may be used in combination.

[Effect of device]

As described above, according to the present invention, the cutting agent supply member (coolant pipe) has a mechanism for moving the center of the spindle by a driving force, and the coolant pipe moves in synchronization with the movement of the inner diameter machining tool attached to the tool post. Since the supply member synchronizing device for controlling the position is provided, the coolant can be always supplied to the inner diameter processing tool cutting edge at the same position and under the same conditions. Further, this allows the cutting edge of the cutting tool to be sufficiently cooled, so that the life of the tool can be extended. Further, the coolant can be sufficiently supplied to the cutting edge of the cutting tool, and the chips can be flushed with the coolant to the tool post side, so that the chips are not accumulated on the spindle side of the work.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a turning machine including a cutting agent supply device showing an embodiment of the present invention, FIG. 2 is a detailed cross-sectional view of a coolant pipe moving mechanism, and FIG. 3 is this cutting agent supply device. FIG. 4 and FIG. 5 are block diagrams of a control device to be implemented, and are explanatory views of a conventional cutting fluid supply device. 6 ... Cutting agent supply member (coolant pipe), 6a ... Nozzle, 7 ... Coolant pipe driving servomotor, 8
...... Pipe support device, 9 ...... Inner diameter machining tool, 11 …… Turret Z-axis servo motor, W …… Workpiece, 21 …… Processor (CPU), 24 …… Machining program file, 28 ……
Turret turret Z-axis position control circuit, 29 …… Turret turret Z-axis amplifier unit, 30 …… Synchronous circuit, 31 …… Coolant pipe position control circuit, 32 …… Coolant pipe amp unit.

Claims (1)

[Scope of utility model registration request] 1. A spindle rotatably supported by a spindle stock, a gripping device provided at a front end portion of the spindle for gripping a workpiece, and a position facing the spindle, with respect to the spindle. A turning machine comprising a tool rest relatively controlled to be movable in a spindle axis direction or a direction orthogonal to the spindle axis, and a tool detachably attached to the tool rest and for machining the workpiece. A cutting agent supply member which is provided so as to penetrate through the spindle and is movable back and forth in the spindle axis direction, and which ejects a cutting agent to the cutting edge of the tool; and the cutting agent supply member is moved in the spindle axis direction. A supply member drive device, and a supply member control device for controlling the supply member drive device so as to synchronously move the cutting agent supply member according to the movement position of the tool rest in the spindle axis direction, Moves synchronously with the cutting edge However, a cutting agent supply device for a turning machine, characterized in that the cutting agent is jetted to the cutting edge of the tool.