CN216828808U - Orifice reverse chamfering cutter based on fluid power and spring - Google Patents

Abstract

The utility model discloses a reverse chamfer sword in drill way based on fluid power and spring, including the cutter arbor, the blade bearing, the chamfer blade, a spring, the cylinder body, push rod and valve, the cutter arbor includes the cutter arbor body, the blade bearing is installed in the lower part of cutter arbor body, the chamfer blade is installed on the blade bearing, the spring mounting is on the cutter arbor body, the push rod includes push rod body and piston, the upper end and the lower extreme of piston of push rod body are connected, the cutter arbor body is equipped with central through-hole and the push rod body passes this central through-hole, the upper portion of cutter arbor body is located to the cylinder body, the inner chamber of cylinder body is arranged in to the piston, the intracavity parietal upper portion of inner chamber of cylinder body is equipped with the valve mounting hole, the valve is installed in the valve mounting hole of one-to-one. The utility model discloses a fluid pressure and spring force realize the automatic flexible function of blade bearing and chamfer blade, can realize reverse chamfer processing function, can not be at perforation in-process fish tail work piece again, and simple structure, easily processing, and the machining precision is high, is convenient for use.

Description

Orifice reverse chamfering cutter based on fluid power and spring

Technical Field

The utility model relates to a reverse chamfer sword in drill way especially relates to a reverse chamfer sword in drill way based on fluid power and spring.

Background

In the field of cutting machining, a working condition that needs chamfering of an orifice is often encountered, namely chamfering processing is carried out on the edge of the end part of a through hole of a workpiece. The chamfering of the orifice includes two modes of forward chamfering and reverse chamfering, the forward chamfering is to cut the orifice into an oblique angle or an inner ring with various shapes and the like by using a chamfering tool with a corresponding chamfering angle or forming after drilling (or forming holes by other methods), and the chamfering mode is the most conventional chamfering mode and is very easy and simple to operate. Reverse chamfer is relative to forward chamfer, i.e. chamfer the orifice directly to the bottom surface of the workpiece.

For workpieces with small weight and small quantity, if the hole opening on the bottom surface of the workpiece needs to be chamfered, the simplest method is to turn over the workpiece and change the workpiece into a forward chamfer after alignment, so that the operation is simpler. However, for workpieces with heavy weight and large quantity, many operations such as turning, aligning, clamping and the like are time-consuming and labor-consuming, and the adoption of the method can seriously affect the production efficiency; or the number of the workpieces is not large, but the workpieces are particularly heavy and large, for example, the maximum diameter of the inner ring and the outer ring of the wind power slewing bearing is several meters, and turning, positioning and aligning are very difficult; or due to the special design of special parts, a forward chamfering tool cannot reach the special parts, and reverse chamfering, spot facing and the like are needed; all of these cases require reverse chamfering.

The orifice reverse chamfering tool is an effective cutting tool for directly carrying out reverse chamfering, the tool does not need to be turned over for positioning, after a workpiece is subjected to forward chamfering or other processing, the rod part and the cutting part of a reverse chamfering cutter bar with a reverse chamfering blade at the cutting part penetrate through a processed hole, the reverse chamfering blade at the cutting part can retract into the cutting part, the reverse chamfering blade extends out after reaching the orifice at the bottom, and the reverse chamfering tool or the workpiece is rotated at the moment, so that reverse chamfering processing can be realized.

Traditional orifice reverse chamfering tool, the control mode that its blade stretches out and retracts realizes automatic control with the spring is many, also adopt control modes such as hydraulic pressure, pneumatics, solenoid valve, for example, the patent of patent number "ZL 200580043669.8", the name is "deburring instrument to the burring of small bore diameter", just utilize the elasticity of spring to realize the automatic pop-up of blade, automatic retraction when the blade is oppressed, the automatic pop-up and the retraction function of blade can be realized to this kind of structure, but there is the inaccurate and not straight shortcoming of contained angle line of chamfer angle, and easy fish tail pore wall when the blade slides the pore wall, cause the damage to the work piece, and this kind of mode can only do sharp chamfer or burring, other curved orifice chamfers can not realize. The reverse chamfering tool adopting the control modes of hydraulic pressure, pneumatic pressure, an electromagnetic valve and the like has the advantages of high angle and straightness accuracy, can be used for processing various formed chamfers, but has the defects of complex structure, high processing difficulty and high cost on the one hand, and also has the problem of proper modification of machine tool electricity and the like if the numerical control program is used for automatically controlling the stretching or the rotation of the chamfering blade on the other hand, and is very inconvenient to apply.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a reverse chamfer sword in drill way based on fluid power and spring that blade flexible control is convenient, can not harm the work piece and be convenient for use just for solving above-mentioned problem.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the orifice reverse chamfering tool based on the fluid power and the spring comprises a tool bar, a blade seat, a chamfering blade and a spring, wherein the tool bar comprises a cylindrical tool bar body, the axial direction of the tool bar body is vertical, the blade seat is arranged at the lower part of the tool bar body, the chamfering blade is arranged on the blade seat, the spring is arranged on the tool bar body and can apply acting force to the blade seat, the orifice reverse chamfering tool based on the fluid power and the spring further comprises a cylinder body, a push rod and a valve, the push rod comprises a cylindrical push rod body and a piston, the upper end of the vertical push rod body is connected with the lower end of the piston, the tool bar body is provided with a vertical central through hole, the vertical push rod body penetrates through the central through hole, the cylinder body is arranged at the upper part of the tool bar body, and an inner cavity of the cylinder body is communicated with the central through hole of the tool bar body, the piston is arranged in the inner cavity of the cylinder body, the outer wall of the piston is in close contact with the inner cavity wall of the cylinder body and can move vertically, the upper portion of the inner cavity of the cylinder body is used for accessing fluid, one or more transverse valve mounting holes are formed in the upper portion of the inner cavity wall of the cylinder body, one or more valves are mounted in the valve mounting holes in one-to-one correspondence, the valves are closed when the pressure of the fluid is higher than a set value and are switched on when the pressure of the fluid is lower than the set value, the spring is mounted in the central through hole of the cutter bar body and enables the push rod to have upward elastic force, and the lower portion of the push rod body can drive the chamfering blade on the blade seat to stretch transversely when moving vertically. The transverse telescopic chamfering blade on the blade seat extends out of the edge of the cutter bar body or retracts into the edge of the cutter bar body, the reverse chamfering processing of an orifice can be realized when the chamfering blade extends out, the chamfering blade is convenient to move together with the cutter bar when the chamfering blade retracts, and the hole wall of a workpiece is prevented from being scratched by the chamfering blade.

Preferably, for convenience of processing and assembly, the orifice reverse chamfer cutter based on the fluid power and the spring further comprises a vertical fluid connecting rod, the cylinder body is arranged at the lower end of the fluid connecting rod and is integrally formed, the fluid connecting rod is provided with a vertical central through hole, the lower end of the central through hole is communicated with the upper part of an inner cavity of the cylinder body, and the lower end of the cylinder body is connected with the upper end of the cutter bar body through a screw.

Preferably, in order to enable the cylinder body and the cutter bar body to be connected more stably and reliably and ensure that the central axes of the cylinder body and the cutter bar body coincide with each other as far as possible, the lower end of the cylinder body is provided with an inwards concave annular groove, the upper end of the cutter bar body is provided with a connecting disc with a larger outer diameter, the upper end of the connecting disc is provided with an upwards convex annular boss, the annular boss is arranged in the annular groove, and a central through hole of the cutter bar body extends to the upper surface and the opening of the annular boss from bottom to top.

Preferably, in order to facilitate quick and stable connection of the cylinder body and the cutter bar body, a plurality of screw holes are formed in the bottom of the annular groove along the circumferential direction, a plurality of mounting through holes are formed in the connecting disc along the circumferential direction, and a plurality of screws penetrate through the mounting through holes from bottom to top and are connected with the screw holes in a one-to-one correspondence mode.

As preferred, for the convenience of installing the spring and having better limit function when making push rod vertical migration, the central through hole of cutter arbor body is including last hole, mesopore and the lower hole that from top to bottom connects gradually and the aperture reduces in proper order, the spring is arranged in the upper hole, the upper end of spring with the piston contact, the lower extreme of spring with the bottom annular step contact in last hole, the hypomere of push rod body is equipped with the guide section that the external diameter is bigger, the external diameter of guide section with the aperture in lower hole is the same, the guide section is arranged in downthehole down.

As preferred, in order to facilitate the vertical movement through the cutter arbor body to realize the flexible function of blade holder, the position that lies in guide section below on the push rod body is equipped with annular groove, the lower part of cutter arbor body is equipped with the mounting groove, be equipped with the installation counter bore on the cell wall of mounting groove, be equipped with the installation through-hole on the blade holder, the one end of horizontal round pin axle is passed the installation through-hole and is placed in realize in the installation counter bore blade holder with swivelling joint between the cutter arbor body, be equipped with the column spinner on the blade holder, the column spinner is arranged in the annular groove, when the push rod body moves down through the annular groove drive the column spinner drives the blade holder is rotatory to be made the chamfer blade stretches out outside the mounting groove of cutter arbor body, when the push rod body moves up through the annular groove drive the column spinner drives the blade holder reverse rotation makes the chamfer blade retract the mounting groove of cutter arbor body in the mounting groove .

Preferably, in order to facilitate installation of the blade holder and make the blade holder more stable in the rotating process, the orifice reverse chamfer cutter based on hydrodynamic force and a spring further comprises a pressing plate, a transverse pressing plate installation screw hole is formed in the position, above the installation groove, of the lower portion of the cutter bar body, a transverse pressing plate installation hole is formed in the upper portion of the pressing plate, a transverse limiting blind hole is formed in the lower portion of the pressing plate, a pressing plate installation screw penetrates through the pressing plate installation hole and then is connected with the pressing plate installation screw hole, and the other end of the pin shaft is arranged in the limiting blind hole.

Preferably, in order to make the blade seat more stable in the rotating process, two ends of the pin shaft are in interference fit with the mounting counter bore and the limiting blind hole respectively.

Preferably, in order to achieve a better chamfering effect, one blade assembly comprises one blade seat, one chamfering blade, one pin shaft and one pressure plate, the orifice reverse chamfering tool based on the fluid power and the spring comprises at least 2 blade assemblies, and the plurality of blade assemblies are distributed in an axial symmetry mode by taking the central axis of the cutter bar body as a symmetry axis.

Preferably, in order to better realize the automatic opening and closing control of the valve by the fluid pressure to realize the vertical movement control of the push rod, the valve includes a valve body, a valve spring and a valve ball, an inner cavity of the valve body includes a large-diameter hole and a small-diameter hole which are connected with each other, the diameter of the large-diameter hole is larger than that of the small-diameter hole, the valve spring is disposed in the small-diameter hole, the valve ball is disposed in the large-diameter hole and is supported by the valve spring, the valve ball is capable of being sealed with a port of the small-diameter hole, an inlet of the valve body is close to the large-diameter hole and is respectively communicated with the large-diameter hole and the inner cavity of the cylinder, and an outlet of the valve body is close to the small-diameter hole and is respectively communicated with the small-diameter hole and the outside of the cylinder. In this structure, the set value of the opening and closing of the valve is mainly determined by the parameters of the valve spring, and the larger the elastic stress is, the larger the set value is.

The beneficial effects of the utility model reside in that:

the utility model discloses a structure that removes fluid pressure automatic control push rod is in the same place with the spring is integrated, form and realize the automatic flexible function of blade seat and chamfer blade through fluid pressure and spring force, do not need outside pneumatic or electric control, only need be connected with the high-pressure coolant output of lathe, the automatic flexible control function of chamfer blade can be realized to the high-pressure coolant control function (only need add opening and the stop command of high-pressure coolant in the procedure can) that utilizes the lathe to take, can realize reverse chamfer processing function, can not be at the fish tail work piece of perforation in-process again, and simple structure, easy processing, the machining precision is high, do not need to reform transform lathe electricity, and convenient application.

Drawings

FIG. 1 is a front view of a hydrodynamic and spring-based orifice reverse chamfer cutter of the present invention;

FIG. 2 is a right side view of the hydrodynamic and spring based orifice reverse chamfer cutter of the present invention;

FIG. 3 is a cross-sectional view A-A of the fluid power and spring based orifice reverse chamfer cutter of the present invention in a right side view;

FIG. 4 is a front cross-sectional view of the fluid link and cylinder body of the hydrodynamic and spring-based orifice reverse chamfer cutter of the present invention;

FIG. 5 is a front cross-sectional view of the cutter bar of the hydrodynamic and spring-based orifice reverse chamfer cutter of the present invention;

FIG. 6 is a front view of the push rod of the hydrodynamic and spring based orifice reverse chamfer cutter of the present invention;

FIG. 7 is a front view of the blade seat of the hydrodynamic and spring-based orifice reverse chamfer cutter of the present invention;

FIG. 8 is a right side view of the blade seat of the hydrodynamic and spring based orifice reverse chamfer cutter of the present invention;

FIG. 9 is a front view of the platen of the hydrodynamic and spring based orifice reverse chamfer cutter of the present invention;

FIG. 10 is a sectional view B-B of the platen of the hydrodynamic and spring-based orifice reverse chamfer cutter of the present invention in front elevation;

FIG. 11 is a front cross-sectional view of the hydrodynamic and spring-based orifice reverse chamfer cutter of the present invention shown in the inoperative position;

FIG. 12 is a front cross-sectional view of the fluid dynamic and spring based orifice reverse chamfer cutter of the present invention in service in a hole;

FIG. 13 is a front cross-sectional view of the fluid dynamic and spring based reverse chamfer cutter of the present invention after drilling during operation;

fig. 14 is a front sectional view of the orifice reverse chamfer cutter based on fluid power and a spring during reverse chamfer machining;

fig. 15 is a front sectional view of the orifice reverse chamfer cutter based on fluid power and a spring according to the present invention, which is slightly modified to perform reverse spot facing.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1-10, the orifice reverse chamfer cutter based on hydrodynamic force and spring of the present invention comprises a cutter bar 3, a blade seat 6, a chamfer blade 5, a spring 9, a cylinder 13, a push rod 7 and a valve 2, wherein the cutter bar 3 comprises a cylindrical cutter bar body 33, the axial direction of the cutter bar body 33 is vertical, the blade seat 6 is installed at the lower part of the cutter bar body 33, the chamfer blade 5 is installed on the blade seat 6, the spring 9 is installed on the cutter bar body 33 and can apply an acting force on the blade seat 6, the push rod 7 comprises a cylindrical push rod body 71 and a piston 70, which are integrally formed, the upper end of the vertical push rod body 71 is connected with the lower end of the piston 70, the cutter bar body 33 is provided with a vertical central through hole through which the vertical push rod body 71 passes, the cylinder 13 is arranged at the upper part of the cutter bar body 33, and the inner cavity 14 of the cylinder 13 is communicated with the central through hole of the cutter bar body 33, the piston 70 is arranged in the inner cavity 14 of the cylinder 13, the outer wall of the piston 70 is in close contact with the cavity wall of the inner cavity 14 of the cylinder 13 and can move vertically, the upper part of the inner cavity 14 of the cylinder 13 is used for receiving fluid (generally, liquid, such as high-pressure cooling liquid of a machine tool), the upper part of the cavity wall of the inner cavity 14 of the cylinder 13 is provided with one or more (four circumferentially and uniformly distributed in the figure) transverse valve mounting holes 12, one or more valves 2 are arranged in the valve mounting holes 12 which correspond to one another one by one, the valves 2 are closed when the pressure of the fluid is higher than a set value and are conducted when the pressure of the fluid is lower than the set value, the spiral spring 9 is arranged in the central through hole of the cutter bar body 33 and enables the push rod 7 to have upward elastic force, and the lower part of the push rod body 71 can drive the chamfering blade 5 on the blade seat 6 to stretch and retract transversely when moving vertically.

As shown in fig. 1-10, the present invention also discloses the following various more specific preferred structures, and the above structures and one or more structures described below can be combined in an overlapping manner to form a more optimized technical solution according to actual needs.

For convenience in processing and assembling, the orifice reverse chamfer cutter based on the fluid power and the spring further comprises a vertical fluid connecting rod 10, a cylinder body 13 is arranged at the lower end of the fluid connecting rod 10 and integrally formed to jointly form a connecting handle 1, the fluid connecting rod 10 is provided with a vertical central through hole 11, the lower end of the central through hole 11 is communicated with the upper portion of an inner cavity 14 of the cylinder body 13, and the lower end of the cylinder body 13 is connected with the upper end of a cutter bar body 33 through a screw.

In order to ensure that the connection between the cylinder body 13 and the cutter bar body 33 is more stable and reliable and the central axes of the cylinder body 13 and the cutter bar body 33 are overlapped as much as possible, the lower end of the cylinder body 13 is provided with an inward concave (i.e. upward concave) annular groove 16, the upper end of the cutter bar body 33 is provided with a connecting disc 31 with a larger outer diameter, the upper end of the connecting disc 31 is provided with an upward convex annular boss 30, the annular boss 30 is arranged in the annular groove 16, and a central through hole of the cutter bar body 33 extends to the upper surface of the annular boss 30 from bottom to top and is opened.

In order to facilitate the quick and stable connection between the cylinder body 13 and the cutter bar body 33, the bottom of the annular groove 16 is circumferentially provided with a plurality of screw holes 15, the connecting disc 31 is circumferentially provided with a plurality of mounting through holes 32, and a plurality of screws penetrate through the mounting through holes 32 in a one-to-one correspondence from bottom to top and are then connected with the screw holes 15 in a one-to-one correspondence.

In order to facilitate the installation of the spring 9 and enable the push rod body 71 to have a better limiting function when moving vertically, the central through hole of the cutter bar body 33 comprises an upper hole 34, a middle hole 35 and a lower hole 36 which are sequentially connected from top to bottom and have sequentially reduced apertures, the spring 9 is arranged in the upper hole 34, the upper end of the spring 9 is contacted with the piston 70, the lower end of the spring 9 is contacted with an annular step at the bottom of the upper hole 34, a guide section 72 with a larger outer diameter is arranged at the lower section of the push rod body 71, the outer diameter of the guide section 72 is the same as the aperture of the lower hole 36, and the guide section 72 is arranged in the lower hole 36; in order to facilitate the spring 9 to be sleeved on the push rod body 71, the inner diameter of the spring 9 must be larger than the outer diameter of the guide section 72.

In order to realize the telescopic function of the blade seat by the vertical movement of the cutter bar body 33, an annular clamping groove 74 is arranged at the position, below the guide section 72, of the push rod body 71, the upper groove wall edge of the annular clamping groove 74 is an arc transition surface 73, the lower part of the cutter bar body 33 is provided with a mounting groove 39, a mounting counter bore 38 is arranged on the bottom groove wall of the mounting groove 39, the upper groove wall surface of the mounting groove 39 is formed by connecting a section of transverse plane, a section of arc surface and a section of inclined plane, the upper end surface of the blade seat 6 is an arc surface 60 matched with the arc surface of the upper groove wall surface of the mounting groove 39, one side surface of the blade seat 6 is tangentially connected with the arc surface 60 to form a vertical rotation stop surface 63, a mounting through hole 62 is arranged on the blade seat 6, one end of a transverse pin shaft 8 passes through the mounting through hole 62 and is placed in the mounting counter bore 38 to realize the rotary connection between the blade seat 6 and the cutter bar body 33, be equipped with evagination and be cylindrical shape's column 61 on blade bearing 6, column 61 is arranged in ring groove 74, push rod body 71 drives column 61 through ring groove 74 during the downstream and drives blade bearing 6 rotatory messenger chamfer blade 5 and stretch out outside the mounting groove 39 of cutter arbor body 33 (stretch out outside the edge of cutter arbor body 33 promptly), push rod body 71 drives column 61 through ring groove 74 during the upstream and drives blade bearing 6 counter-rotation and make chamfer blade 5 retract in the mounting groove 39 of cutter arbor body 33 (retract in the edge of cutter arbor body 33 promptly), be equipped with blade mounting groove 66 on blade bearing 6, be equipped with blade installation screw 65 on the bottom cell wall of blade mounting groove 66, chamfer blade 5 passes through blade mounting screw and installs in blade mounting groove 66, the position that corresponds with blade mounting groove 66 on the rotation-stopping face 63 contracts and forms breach 64, the cutting portion of chamfer blade 5 is located this breach 64.

In order to facilitate installation of the blade seat 6 and enable the blade seat 6 to be more stable in the rotating process, the orifice reverse chamfer cutter based on hydrodynamic force and a spring further comprises a pressing plate 4, a transverse pressing plate installation screw hole 37 is formed in the position, above the installation groove 39, of the lower portion of the cutter bar body 33, a transverse pressing plate installation hole 40 is formed in the upper portion of the pressing plate 4, a transverse limiting blind hole 41 is formed in the lower portion of the pressing plate 4, a pressing plate installation screw penetrates through the pressing plate installation hole 40 and then is connected with the pressing plate installation screw hole 37, and the other end of the pin shaft 8 is arranged in the limiting blind hole 41.

In order to make the blade seat 6 more stable in the rotating process, two ends of the pin shaft 8 are respectively in interference fit with the mounting counter bore 38 and the limiting blind hole 41.

In order to realize better chamfering effect, one blade assembly comprises a blade seat 6, a chamfering blade 5, a pin shaft 8 and a pressing plate 4, the orifice reverse chamfering tool based on the fluid power and the spring comprises at least 2 blade assemblies (two in the figure), and the plurality of blade assemblies are distributed in axial symmetry by taking the central axis of the cutter bar body 33 as a symmetry axis.

In order to better realize the automatic opening and closing control of the valve 2 by the fluid pressure to realize the vertical movement control of the push rod 7, the valve 2 comprises a valve body (not marked in the figure), a valve spring 21 and a valve ball 22, the inner cavity of the valve body comprises a large-diameter hole 23 and a small-diameter hole 20 which are connected with each other, the aperture of the large-diameter hole 23 is larger than that of the small-diameter hole 20, the valve spring 21 is arranged in the small-diameter hole 20, the valve ball 22 is arranged in the large-diameter hole 23 and is supported by the valve spring 21, the valve ball 22 can be sealed with the port of the small-diameter hole 20, the inlet of the valve body is close to the large-diameter hole 23 and is respectively communicated with the large-diameter hole 23 and the inner cavity 14 of the cylinder 13, and the outlet of the valve body is close to the small-diameter hole 20 and is respectively communicated with the small-diameter hole 20 and the outside of the cylinder 13.

With reference to fig. 1 to 14, in use, the orifice reverse chamfering tool is connected to a spindle of a machine tool, and the upper end of the fluid connecting rod 10 is connected to a high-pressure coolant port in the spindle of the machine tool, and after the workpiece 91 completes the forward chamfering process or other processes at one end of the through hole 92, the orifice reverse chamfering tool is used to perform reverse chamfering process on the through hole 92 of the workpiece 91, and the specific process is as follows:

the first step is as follows: when the high-pressure coolant is turned off, the push rod 7 moves upward under the urging of the spring 9, the ring slot 74 drives the rotating column 61 to drive the blade seat 6 to rotate around the pin 8 (clockwise in the figure), and the blade seat 6 drives the chamfering blade 5 to rotate together, so that the chamfering blade 5 retracts into the mounting groove 39 of the tool holder body 33, as shown in fig. 11.

The second step is that: the entire orifice reverse chamfer cutter is passed through the through hole 92 of the workpiece 91 from top to bottom as shown in fig. 12 until the lower end of the cutter bar body 33 is exposed below the through hole 92 of the workpiece 91 as shown in fig. 13.

The third step: high-pressure cooling liquid is started through program control, the high-pressure cooling liquid enters the inner cavity 14 of the cylinder body 13 after passing through the central through hole 11 of the fluid connecting rod 10, because the pressure of the high-pressure cooling liquid is higher than the elastic force of the valve spring 21, the valve ball 22 moves towards the direction close to the small-diameter hole 20 until being in close contact with the port of the small-diameter hole 20 to form a seal, the high-pressure cooling liquid cannot flow out of the cylinder body 13 through the valve 2, the pressure of the high-pressure cooling liquid acts on the upper surface of the piston 70, the piston 70 and the push rod body 71 are pushed to move downwards by overcoming the elastic force of the spring 9, the annular clamping groove 74 drives the rotating column 61 to drive the blade seat 6 to rotate around the pin shaft 8 in the reverse direction (in the drawing, the blade seat 6 drives the chamfering blade 5 to rotate in the reverse direction together, so that the chamfering blade 5 extends out of the mounting groove 39 of the cutter bar body 33, as shown in fig. 13.

The fourth step: the reverse chamfering tool of the orifice is rotated under the control of a program, and simultaneously, the chamfering blade 5 is fed upwards to contact with the inner edge of the lower end of the through hole 92 of the workpiece 91, so that chamfering cutting is realized, as shown in fig. 14; the pressure provided by the high pressure coolant must be greater than the chamfer cutting force plus the spring thrust of spring 9. Under the condition that the pressure of the high-pressure cooling liquid is constant, the feed amount needs to be adjusted, so that the chamfering cutting force is smaller than the pressure provided by the high-pressure cooling liquid.

The fifth step: after the chamfering process is completed, the high-pressure cooling liquid is stopped through program control, the cooling liquid pressure in the inner cavity 14 of the cylinder 13 is rapidly reduced until the pressure is smaller than the elastic force of the valve spring 21, the valve spring 21 pushes the valve ball 22 to move in the direction away from the small-diameter hole 20, the valve 2 is opened, the cooling liquid flows out of the cylinder 13 from the valve 2, the pressure in the inner cavity 14 of the cylinder 13 is further reduced, the first step action is repeated under the pushing of the spring 9, and the blade seat 6 and the chamfering blade 5 are retracted into the mounting groove 39 of the cutter bar body 33, which is shown in fig. 11.

And a sixth step: by controlling the present orifice reverse chamfering tool to move up quickly by a program, the chamfering blade 5 is withdrawn without any contact with the hole wall of the through hole 92 of the workpiece 91, refer to fig. 12. Thus, one chamfering operation is completed and preparation is made for the next chamfering processing.

As shown in fig. 15, the reverse spot facing function of the through hole 92 of the workpiece 91 can be achieved by appropriately changing the shape of the insert seat 6 and the mounting position of the chamfer insert 5 of the present orifice reverse chamfer cutter.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.

Claims (10)

1. The utility model provides a reverse chamfer sword in drill way based on fluid power and spring, includes cutter arbor, blade holder, chamfer blade and spring, the cutter arbor includes columniform cutter arbor body, establishes the axial of cutter arbor body is vertical, the blade holder is installed the lower part of cutter arbor body, the chamfer blade is installed on the blade holder, the spring mounting be in on the cutter arbor body and can be right the effort, its characterized in that are applyed to the blade holder: the orifice reverse chamfer cutter based on the fluid power and the spring further comprises a cylinder body, a push rod and valves, wherein the push rod comprises a cylindrical push rod body and a piston, the upper end of the vertical push rod body is connected with the lower end of the piston, the cutter bar body is provided with a vertical central through hole, the vertical push rod body penetrates through the central through hole, the cylinder body is arranged on the upper part of the cutter bar body, an inner cavity of the cylinder body is communicated with the central through hole of the cutter bar body, the piston is arranged in the inner cavity of the cylinder body, the outer wall of the piston is in close contact with and can vertically move with the wall of the inner cavity of the cylinder body, the upper part of the inner cavity of the cylinder body is used for receiving fluid, one or more transverse valve mounting holes are formed in the upper part of the wall of the inner cavity of the cylinder body, and one or more valves are arranged in the valve mounting holes which correspond one to one another, the valve is closed when the pressure of the fluid is higher than a set value and is switched on when the pressure of the fluid is lower than the set value, the spring is installed in the central through hole of the cutter bar body and enables the push rod to have upward elastic force, and the lower portion of the push rod body can drive the chamfering blade on the blade seat to transversely stretch and retract when moving vertically.

2. The hydrodynamic and spring-based orifice reverse chamfer cutter of claim 1, wherein: the orifice reverse chamfer cutter based on the fluid power and the spring further comprises a vertical fluid connecting rod, the cylinder body is arranged at the lower end of the fluid connecting rod and is integrally formed, the fluid connecting rod is provided with a vertical central through hole, the lower end of the central through hole is communicated with the upper portion of an inner cavity of the cylinder body, and the lower end of the cylinder body is connected with the upper end of the cutter bar body through a screw.

3. The hydrodynamic and spring-based orifice reverse chamfer cutter of claim 2, wherein: the lower extreme of cylinder body is equipped with the annular groove of indent, the upper end of cutter arbor body is equipped with the connection pad that the external diameter is bigger, the upper end of connection pad is equipped with the annular boss of epirelief, annular boss arranges in the annular groove, the central through-hole of cutter arbor body extends to from bottom to top the upper surface and the opening of annular boss.

4. The hydrodynamic and spring-based orifice reverse chamfer cutter of claim 3, wherein: the tank bottom of annular groove is equipped with a plurality of screws along circumference, be equipped with a plurality of mounting hole along circumference on the connection pad, it is a plurality of the screw passes one-to-one from bottom to top a plurality of with one-to-one behind the mounting hole the screw is connected.

5. The hydrodynamic and spring-based orifice reverse chamfer cutter of claim 1, wherein: the center through-hole of cutter arbor body is including connecting gradually and the last hole, mesopore and the lower hole that the aperture reduces in proper order from top to bottom, the spring is arranged in the upper hole, the upper end of spring with the piston contact, the lower extreme of spring with the bottom annular step contact of upper hole, the hypomere of push rod body is equipped with the bigger direction section of external diameter, the external diameter of direction section with the aperture of lower hole is the same, the direction section is arranged in downthehole.

6. The hydrodynamic and spring-based orifice reverse chamfer cutter of claim 5, wherein: an annular clamping groove is arranged at the position, below the guide section, on the push rod body, an installation groove is arranged at the lower part of the cutter bar body, a mounting counter bore is arranged on the wall of the mounting groove, a mounting through hole is arranged on the blade seat, one end of a transverse pin shaft passes through the mounting through hole and is arranged in the mounting counter bore to realize the rotary connection between the blade seat and the cutter bar body, the blade seat is provided with a rotating column which is arranged in the annular clamping groove, when the push rod body moves downwards, the rotating column is driven by the annular clamping groove to drive the blade seat to rotate, so that the chamfering blade extends out of the mounting groove of the cutter bar body, when the push rod body moves upwards, the rotating column is driven by the annular clamping groove to drive the blade seat to rotate reversely, so that the chamfering blade retracts into the mounting groove of the cutter bar body.

7. The hydrodynamic and spring-based orifice reverse chamfer cutter of claim 6, wherein: the orifice reverse chamfer cutter based on the hydrodynamic force and the spring further comprises a pressing plate, a transverse pressing plate mounting screw hole is formed in the position, above the mounting groove, of the lower portion of the cutter bar body, a transverse pressing plate mounting hole is formed in the upper portion of the pressing plate, a transverse limiting blind hole is formed in the lower portion of the pressing plate, a pressing plate mounting screw penetrates through the pressing plate mounting hole and then is connected with the pressing plate mounting screw hole, and the other end of the pin shaft is arranged in the limiting blind hole.

8. The hydrodynamic and spring-based orifice reverse chamfer cutter of claim 7, wherein: and two ends of the pin shaft are in interference fit with the mounting counter bore and the limiting blind hole respectively.

9. The hydrodynamic and spring-based orifice reverse chamfer cutter of claim 7, wherein: the fluid power and spring based orifice reverse chamfering tool comprises at least 2 blade assemblies, and the plurality of blade assemblies are axially and symmetrically distributed by taking the central axis of the cutter bar body as a symmetrical axis.

10. The hydrodynamic and spring-based orifice reversal chamfer cutter of any of claims 1-9, wherein: the valve comprises a valve body, a valve spring and a valve ball, wherein the inner cavity of the valve body comprises a large-diameter hole and a small-diameter hole which are connected with each other, the aperture of the large-diameter hole is larger than that of the small-diameter hole, the valve spring is arranged in the small-diameter hole, the valve ball is arranged in the large-diameter hole and is propped against by the valve spring, the valve ball can be sealed with the port of the small-diameter hole, the inlet of the valve body is close to the large-diameter hole and is respectively communicated with the large-diameter hole and the inner cavity of the cylinder body, and the outlet of the valve body is close to the small-diameter hole and is respectively communicated with the small-diameter hole and the outside of the cylinder body.

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