CN115446637A

CN115446637A - Quick tool changing device of graphite processing machine tool

Info

Publication number: CN115446637A
Application number: CN202211117643.5A
Authority: CN
Inventors: 薛松海; 占稳; 姜春泉; 鄢世平; 叶方勤; 佘佳晟; 王海滨; 林明炆; 李国斌
Original assignee: China National Machinery Institute Group Haixi Fujian Branch Co ltd
Current assignee: China National Machinery Institute Group Haixi Fujian Branch Co ltd
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2022-12-09
Anticipated expiration: 2042-09-14
Also published as: CN115446637B

Abstract

The invention discloses a quick tool changing device of a graphite processing machine tool, which relates to the technical field of graphite processing and comprises a storage assembly, wherein the storage assembly comprises a protective shell, a rotary table is rotatably arranged on the protective shell, a tool shank mounting cylinder is movably arranged on the rotary table, a plurality of tool shank mounting cylinders are arranged at the periphery of the rotary table as required and are elastically connected with the rotary table through torsional springs and used for resetting the initial position of the tool shank mounting cylinder, the center of the torsional spring is fixedly connected with the tool shank mounting cylinder, the outer ring of the torsional spring is fixedly connected with the rotary table, swing rods are fixedly arranged on the tool shank mounting cylinder, and the swing rods are also rotatably arranged on the rotary table. According to the invention, by arranging the storage assembly, more kinds of cutters can be placed by changing the diameter of the turntable; through the matching of the clamping assembly and the rotating assembly, the tool can be quickly changed only by controlling the rotation start-stop angle of the rotating driving motor; the tool shank can be automatically replaced from the tool shank mounting cylinder to the main shaft of the machine tool.

Description

Quick tool changing device of graphite processing machine tool

Technical Field

The invention relates to the technical field of graphite processing, in particular to a quick tool changing device of a graphite processing machine tool.

Background

The graphite can be used for producing refractory materials, conductive materials, wear-resistant materials, lubricants, high-temperature-resistant sealing materials, corrosion-resistant materials, heat-insulating materials, adsorbing materials, friction materials, radiation-proof materials and the like, and can be used as a mold of glassware because the graphite has a small thermal expansion coefficient and can resist changes of rapid cooling and rapid heating.

In order to improve the replacement speed between different cutters, the prior art publication No. CN106181460B discloses a quick cutter changing device, which includes a fixed cutter holder assembly, a movable cutter holder assembly, and a blade, where the fixed cutter holder assembly includes a fixed cutter holder and a clamping block adjustably fixed on the fixed cutter holder, the movable cutter holder assembly includes a movable cutter holder and a clamping groove, the clamping groove is fixedly disposed on the movable cutter holder, the fixed cutter holder assembly and the movable cutter holder assembly are fixedly connected through the clamping block and the clamping groove, the blade is fixed on the movable cutter holder, the fixed cutter holder is provided with a first mounting hole and a second mounting hole, a clamping body is mounted in the first mounting hole, and a rotary clamping rod is mounted in the second mounting hole.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a quick tool changer of a graphite processing machine tool, which comprises a storage assembly, wherein the storage assembly comprises a protective shell, a rotary table is rotatably arranged on the protective shell, a tool handle mounting cylinder is movably arranged on the rotary table, a plurality of tool handle mounting cylinders are arranged at the periphery of the rotary table as required and are elastically connected with the rotary table through torsional springs for resetting the initial position of the tool handle mounting cylinder, the center of the torsional spring is fixedly connected with the tool handle mounting cylinders, the outer ring of the torsional spring is fixedly connected with the rotary table, swing rods are fixedly arranged on the tool handle mounting cylinders and are also rotatably arranged on the rotary table, grooves capable of enabling the swing rods to freely move are formed in the rotary table, a swing rod limiting block for limiting the rotation angle of the swing rods is fixedly arranged on the rotary table, push blocks are lapped on the swing rods and are slidably arranged on the rotary table through push block sliding rods, and the push blocks are lapped on the end parts of telescopic rods of push cylinders; the clamping assembly comprises a clamping plate, two ends of the clamping plate are provided with U-shaped grooves for placing the tool holders, a hydraulic channel is formed in the clamping plate, a clamping push rod for clamping the tool holders is slidably mounted on the inner wall of the hydraulic channel, one end of the hydraulic channel, which is far away from the clamping push rod, is provided with a pressure barrel, the pressure barrel is fixedly mounted on the clamping plate, the inner wall of the pressure barrel is slidably mounted with a pressure piston, a driven rack is fixedly mounted on the pressure piston, the driven rack is meshed with a driving rack through a middle gear and pinion, and the bottom end of the driving rack is fixedly mounted with a reset spring; rotating assembly, rotating assembly includes rotatory bucket, rotates on the rotatory bucket and installs pulling reset spring support, and pulling reset spring support only rotates along the axis of rotatory bucket, can not remove along the axis of rotatory bucket, and the inner wall movable mounting of rotatory bucket has the lift wave bucket, rotates on the inner wall of rotatory bucket to install spacing pulley, and spacing pulley overlap joint is at the upper surface at lift wave bucket edge, fixed mounting has the piece that holds on the lift wave bucket, and fixed mounting has hexagonal prism on the piece that holds to pulling reset spring support and holding rotate between the piece and install the pulling reset spring.

Preferably, last fixed mounting of protecting sheathing has the protection casing, protection casing and push cylinder fixed connection, the subassembly of depositing still include the band pulley ring of fixed mounting on the carousel, last still fixed mounting of protecting sheathing has driving motor, fixed mounting has the band pulley on driving motor's the output shaft, the band pulley passes through belt transmission with the band pulley ring and is connected.

Preferably, the side of the belt wheel is provided with a first extrusion wheel for extruding the belt, the belt is provided with a second extrusion wheel for extruding the belt at any position of the circumferential tangent point of the belt wheel, the first extrusion wheel and the second extrusion wheel are rotatably installed on different extrusion wheel supports, and the two extrusion wheel supports are both slidably installed on the protective cover through extrusion wheel support sliding rods.

Preferably, the top end of the return spring is fixedly connected with the driving rack, the bottom end of the return spring is fixedly connected with the clamping plate, the driven rack is meshed with the intermediate gear, the intermediate gear is meshed with the driving rack gear, the intermediate gear is rotatably mounted on the clamping plate through the rack support, and the intermediate gear and the driving rack are slidably mounted on the rack support.

Preferably, a groove is formed in the bearing block, a friction plate is slidably mounted on the inner wall of the groove, and a friction pressure increasing spring for providing pressure is fixedly mounted on the friction plate.

Preferably, the receiving block is rotatably connected to the top end of the clamping plate mounting shaft, and the end surface of the clamping plate mounting shaft is frictionally connected to the end surface of the friction plate.

Preferably, a rotating driven gear is slidably mounted on the hexagonal prism, the rotating driven gear is rotatably mounted on the protective cover, a rotating driving motor is fixedly mounted on the protective cover, a rotating driving gear is fixedly mounted on an output shaft of the rotating driving motor, and the rotating driving gear is meshed with the rotating driven gear.

Preferably, the inside of the handle mounting cylinder is provided with a projection for clamping the handle, and the inner wall of the handle mounting cylinder is made of rubber.

Preferably, the clamping plate is fixedly installed on a clamping plate installation shaft, a clamping plate limiting frame is sleeved on the clamping plate installation shaft, and the clamping plate limiting frame is fixedly installed on the protective cover.

Preferably, the return spring drives the rack to contact with the lower surface of the clamping plate limiting frame in a compressed state.

Has the advantages that:

compared with the prior art, the invention provides a quick tool changing device of a graphite processing machine tool, which has the following beneficial effects: (1) By arranging the storage assembly, more kinds of cutters can be placed by changing the diameter of the turntable; (2) According to the tool changing device, the clamping assembly is matched with the rotating assembly, and the tool can be quickly changed only by controlling the rotating start-stop angle of the rotating driving motor; (3) The tool holder can be automatically replaced onto the main shaft of the machine tool from the tool holder installation cylinder.

Drawings

FIG. 1 is a schematic diagram I of the present invention;

FIG. 2 is a schematic view II of the present invention;

FIG. 3 is a schematic view of the storage module of the present invention;

FIG. 4 is a schematic view of the storage assembly of the present invention;

FIG. 5 is a schematic view of the storage module of the present invention;

FIG. 6 is a schematic view IV of the storage assembly of the present invention;

FIG. 7 is a schematic view of the storage module of the present invention;

FIG. 8 is a schematic view of the structure of the present invention III;

FIG. 9 is a schematic view of the structure at A in FIG. 8 according to the present invention;

FIG. 10 is a schematic diagram IV of the structure of the present invention;

FIG. 11 is a schematic view of a clamping assembly of the present invention;

FIG. 12 is a schematic view of the structure of FIG. 11 at B in accordance with the present invention;

FIG. 13 is a schematic view of a clamping assembly of the present invention;

FIG. 14 is a schematic view of the structure of FIG. 13 at C;

FIG. 15 is a schematic view of a clamping assembly of the present invention;

FIG. 16 is a schematic view of the structure of FIG. 15 at D in accordance with the present invention;

FIG. 17 is a schematic view of the rotating assembly of the present invention;

FIG. 18 is a schematic view of a rotary assembly of the present invention;

FIG. 19 is a schematic view of a rotary assembly of the present invention;

FIG. 20 is a schematic view IV of a clamping assembly according to the present invention;

FIG. 21 is a schematic view of the structure of FIG. 20 at E in accordance with the present invention;

FIG. 22 is a schematic view of the structure of FIG. 20 at F in accordance with the present invention;

FIG. 23 is a cross-sectional view of a shank mounting cartridge of the present invention;

in the figure: 101-a protective housing; 102-a turntable; 103-a protective cover; 104-a drive motor; 105-a first extrusion wheel; 106-a pulley; 107-extrusion wheel support; 108-squeeze wheel carriage slide bar; 109-pressing spring; 110-a belt; 111-a second extrusion wheel; 112-a pusher slide bar; 113-a push block; 114-a push cylinder; 115-pulley ring; 116-a shank mounting cylinder; 117-torsion spring; 118-a sway bar; 119-a rocking lever limiting block; 201-a clamping plate; 202-hydraulic channel; 203-clamping the push rod; 204-pressure barrel; 205-a pressure piston; 206-passive rack; 207-intermediate gear; 208-a driving rack; 209-rack support; 210-a return spring; 211-clamping plate limiting frame; 301-rotating the barrel; 302-lifting wave buckets; 303-clamping plate mounting shaft; 304-friction compression spring; 305-pulling the reset spring support; 306-a rotary drive gear; 307-rotating active electric machine; 308-rotating driven gear; 309-a limiting pulley; 310-pulling the reset spring; 311-hexagonal prism; 312-a bearing block; 313-a friction plate; 4-knife handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 7, the present invention provides a technical solution: the device comprises a storage assembly, the storage assembly comprises a protective shell 101, a rotary table 102 is rotatably mounted on the protective shell 101, a knife handle mounting barrel 116 is movably mounted on the rotary table 102, a plurality of knife handle mounting barrels 116 are arranged at the periphery of the rotary table 102 as required, the knife handle mounting barrel 116 is elastically connected with the rotary table 102 through a torsion spring 117 and is used for resetting the initial position of the knife handle mounting barrel 116, the center of the torsion spring 117 is fixedly connected with the knife handle mounting barrel 116, the outer ring of the torsion spring 117 is fixedly connected with the rotary table 102, a swing rod 118 is fixedly mounted on the knife handle mounting barrel 116, the swing rod 118 is also rotatably mounted on the rotary table 102, it is described that a groove capable of enabling the swing rod 118 to freely move is formed in the rotary table 102, a swing rod limiting block 119 for limiting the rotation angle of the swing rod 118 is fixedly mounted on the rotary table 102, a push block 113 is lapped on the swing rod 118, the push block 113 is slidably mounted on the rotary table 102 through a push block sliding rod 112, the push block 113 is lapped on the end of a telescopic rod of the push cylinder 114, a protective shell 103 is fixedly mounted on the protective shell 101, a second belt pulley support 106 for driving a belt pulley 110 mounted on a belt pulley 110, a second belt pulley support 106 for driving pulley 108, a belt pulley 108 for driving pulley 108 and a second belt pulley 108 are mounted on a belt pulley 104, a belt pulley 108 for driving pulley 108, a belt pulley 108 mounted on the protective shell 115, a belt pulley 104, a belt pulley 108 for driving pulley 108, a belt pulley 104, a belt pulley 108 for driving a belt pulley 108, a belt pulley 108 is mounted on a belt pulley 104, a belt pulley 106 for driving pulley 106, a belt pulley 108, a belt pulley 106, the first extruding wheel 105 and the second extruding wheel 111 are used for applying a force pointing to the direction of the circle center of the pulley ring 115, as shown in fig. 23, a protruding block for clamping the tool shank 4 is arranged inside the tool shank mounting cylinder 116, and the inner wall of the tool shank mounting cylinder 116 is made of rubber, so that the tool shank 4 is prevented from sliding relatively on the tool shank mounting cylinder 116.

As shown in fig. 8-16, fig. 20, and fig. 21, the clamping assembly includes a clamping plate 201, two ends of the clamping plate 201 are both provided with a U-shaped groove for placing the tool holder 4, a hydraulic channel 202 is provided inside the clamping plate 201, a clamping push rod 203 for clamping the tool holder 4 is slidably mounted on an inner wall of the hydraulic channel 202, one end of the hydraulic channel 202 away from the clamping push rod 203 is provided with a pressure barrel 204, the pressure barrel 204 is fixedly mounted on the clamping plate 201, an inner wall of the pressure barrel 204 is slidably mounted with a pressure piston 205, a passive rack 206 is fixedly mounted on the pressure piston 205, the passive rack 206 is engaged with a driving rack 208 through a middle gear 207, a return spring 210 is fixedly mounted at a bottom end of the driving rack 208, a top end of the return spring 210 is fixedly connected with the driving rack 208, a bottom end of the return spring 210 is fixedly connected with the clamping plate 201, the passive rack 206 is engaged with a middle gear 207, the middle gear 207 is engaged with a gear of the driving rack 208, the middle gear 207 is rotatably mounted on the clamping plate 201 through a rack bracket 209, the middle gear 207 and the driving rack are slidably mounted on the clamping plate 201, the mounting shaft 303 is mounted on the clamping plate 303, the clamping plate 211, the clamping plate mounting shaft 211 is in a state that the clamping plate 211 is connected with the clamping rack 211, the clamping plate mounting shaft 211, and the clamping plate mounting shaft 211, the clamping plate mounting shaft 211 is not connected with the clamping rack 211, and the clamping plate mounting shaft 211, the clamping plate mounting shaft 211 is connected with the clamping plate mounting shaft 211.

As shown in fig. 17, fig. 18, fig. 19 and fig. 22, the rotating assembly includes a rotating barrel 301, a pulling return spring bracket 305 is rotatably mounted on the rotating barrel 301, it should be noted that the pulling return spring bracket 305 only rotates along the axis of the rotating barrel 301 and does not move along the axis of the rotating barrel 301, a lifting wave barrel 302 is movably mounted on the inner wall of the rotating barrel 301, a limiting pulley 309 is rotatably mounted on the inner wall of the rotating barrel 301, the limiting pulley 309 is overlapped on the upper surface of the edge of the lifting wave barrel 302, a receiving block 312 is fixedly mounted on the lifting wave barrel 302, a hexagonal prism 311 is fixedly mounted on the receiving block 312, and a pulling return spring 310 is rotatably mounted between the pulling return spring bracket 305 and the receiving block 312, it should be noted that both ends of the pulling return spring 310 and both the pulling return spring bracket 305 and the receiving block 312 rotate along the axis of the rotating barrel 301, the bearing block 312 is provided with a groove inside, a friction plate 313 is slidably mounted on the inner wall of the groove, a friction compression spring 304 for providing pressure is fixedly mounted on the friction plate 313, it should be noted that the friction plate 313 only moves along the axis of the bearing block 312 and does not rotate along the axis of the bearing block 312, the bearing block 312 is rotatably connected with the top end of the clamping plate mounting shaft 303, the end face of the clamping plate mounting shaft 303 is frictionally connected with the end face of the friction plate 313, a rotating driven gear 308 is slidably mounted on the hexagonal prism 311, the rotating driven gear 308 is rotatably mounted on the protective cover 103, a rotating driving motor 307 is fixedly mounted on the protective cover 103, a rotating driving gear 306 is fixedly mounted on an output shaft of the rotating driving motor 307, and the rotating driving gear 306 is in gear engagement with the rotating driven gear 308.

Before the device is used, the device needs to be installed at a position of a machine tool, which does not interfere with movement of a main shaft, when the device is used, a user firstly installs a required cutter on a cutter handle 4, then the cutter handle 4 is clamped on a cutter handle installation cylinder 116, at the moment, the direction of the cutter handle 4 is parallel to the axis of a protective shell 101, the rotation of a driving motor 104 is controlled according to needs, the driving motor 104 rotates to drive a belt pulley 106 to rotate, the belt pulley 106 rotates to drive a belt pulley ring 115 to rotate through a belt 110, the belt pulley ring 115 rotates to drive a rotary disc 102 to rotate, the rotary disc 102 rotates to drive all the cutter handle installation cylinders 116 to rotate, as shown in fig. 1, until the required cutter handle 4 rotates to an opening at the lowest end of the protective shell 101, as shown in fig. 7, at the moment, a pushing cylinder 114 is started, a telescopic rod of the pushing cylinder 114 drives a push block 113 to move along the surface of a push block sliding rod 112, meanwhile, the push block 113 drives a swing rod 118 to swing, and the swing rod 118 is fixedly connected with the installation cylinder 116, so that the installation cylinder 116 can synchronously rotate until the cutter handle 116 rotates to a vertical state as shown in fig. 9.

By controlling the rotating driving motor 307, the clamping plate 201 swings to the position shown in fig. 8 to receive the tool shank 4, meanwhile, the output shaft of the rotating driving motor 307 drives the rotating driving gear 306 to rotate, the rotating driving gear 306 drives the rotating driven gear 308 to rotate, the rotating driven gear 308 drives the hexagonal prism 311 to rotate, the hexagonal prism 311 drives the receiving block 312 to rotate, the receiving block 312 drives the friction plate 313 to rotate, the friction plate 313 rotates to drive the clamping plate mounting shaft 303 rotationally connected with the receiving block 312 to rotate together, at this time, the hexagonal prism 311 and the clamping plate mounting shaft 303 synchronously rotate, at this time, because the clamping plate 201 is limited by the clamping plate limiting frame 211, the relative rotation between the friction plate 313 and the clamping plate mounting shaft occurs, the receiving block 312 continues to rotate, the receiving block 312 rotates to drive the lifting wave barrel 302 to rotate, the rotation of the lifting wave barrel 302 rotates from the position shown in fig. 17 to the position shown in fig. 19 under the restriction of the limiting pulley 309, and moves along the axis of the rotary barrel 301, at this time, the clamping plate mounting shaft 303 also moves along the axis of the rotary barrel 301, so the clamping plate 201 moves synchronously, when the clamping plate 201 moves to the position where it can be separated from the restriction of the clamping plate limiting frame 211, the clamping plate 201 continues to rotate, at the same time, the receiving block 312 is pulled back to the initial height by the pulling return spring 310, at the same time, the clamping plate mounting shaft 303 and the clamping plate 201 also make the same movement, the tool shank 4 rotates to the position of the spindle of the machine tool, it should be noted that the spindle of the machine tool needs to move to the position where the height is level with the height of the tool shank mounting barrel 116 shown in fig. 8, at this time, if the hexagonal prism 311 continues to rotate, the clamping plate 201 continues to rotate, therefore, in a rotation period of one rotation of the hexagonal prism 311, the clamping plate 201 will move vertically for a quarter of the time without rotating, and in this period, as shown in fig. 16 and 21, the active rack 208 will contact with the clamping plate holder 211, so that the active rack 208 will move downward under the restriction of the clamping plate holder 211, the active rack 208 will drive the intermediate gear 207 to rotate downward, the intermediate gear 207 will drive the passive rack 206 to move upward, the passive rack 206 will drive the pressure piston 205 to move upward, the pressure piston 205 will move upward, the pressure inside the pressure barrel 204 will decrease, and therefore the pressure inside the hydraulic channel 202 will decrease, at this time, the clamping push rod 203 will contract into the hydraulic channel 202, and when the active rack 208 disengages from the clamping plate holder 211, the clamping push rod 203 will be squeezed out again under the action of the return spring 210, as shown in fig. 12 and 14, so that only when the holder 211 is restricted by the clamping plate holder 211, that is, as shown in fig. 16, the clamping position 203 will be squeezed out from the other clamping plate holders 4, and the knife handle 203 will be prevented from falling out, and falling out of the clamping plate.

When the belt 110 is operated for a long time, a problem of slack may occur because the first pressing wheel 105 and the second pressing wheel 111 are provided to press the contact stress points of the belt 110 on the pulley 106 and the pulley ring 115, respectively, as shown in fig. 4, so that the right side of the belt 110 is always in a tight state, thereby preventing a slip phenomenon from occurring between the belt 110 and the pulley 106 and the pulley ring 115.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a graphite machine tool's quick tool changing device which characterized in that: the device comprises a storage assembly, wherein the storage assembly comprises a protective shell (101), a rotary table (102) is rotatably mounted on the protective shell (101), a tool shank mounting cylinder (116) is movably mounted on the rotary table (102), the tool shank mounting cylinder (116) is elastically connected with the rotary table (102) through a torsion spring (117), a swing rod (118) is fixedly mounted on the tool shank mounting cylinder (116), a push block (113) is lapped on the swing rod (118), the push block (113) is slidably mounted on the rotary table (102) through a push block sliding rod (112), and the push block (113) is lapped at the end part of a telescopic rod of a push cylinder (114);

the clamping assembly comprises a clamping plate (201), two ends of the clamping plate (201) are provided with U-shaped grooves for placing the tool holders (4), a hydraulic channel (202) is formed in the clamping plate (201), a clamping push rod (203) for clamping the tool holders (4) is slidably mounted on the inner wall of the hydraulic channel (202), one end, away from the clamping push rod (203), of the hydraulic channel (202) is provided with a pressure barrel (204), the pressure barrel (204) is fixedly mounted on the clamping plate (201), a pressure piston (205) is slidably mounted on the inner wall of the pressure barrel (204), a driven rack (206) is fixedly mounted on the pressure piston (205), a driving rack (208) is meshed with the driven rack (206) through a middle gear (207), and a reset spring (210) is fixedly mounted at the bottom end of the driving rack (208);

rotating assembly, rotating assembly includes rotatory bucket (301), rotates on rotatory bucket (301) and installs pulling reset spring support (305), and the inner wall movable mounting of rotatory bucket (301) has lift wave bucket (302), rotates on the inner wall of rotatory bucket (301) and installs spacing pulley (309), and spacing pulley (309) overlap joint is at the upper surface at lift wave bucket (302) edge, fixed mounting has bearing piece (312) on lift wave bucket (302), and fixed mounting has hexagonal prism (311) on bearing piece (312) to pulling reset spring support (305) and rotating between bearing piece (312) install pulling reset spring (310).

2. The quick tool changing device of a graphite processing machine tool according to claim 1, characterized in that: a protective cover (103) is fixedly mounted on the protective shell (101), and the protective cover (103) is fixedly connected with the pushing cylinder (114).

3. The quick tool changer of a graphite processing machine tool as claimed in claim 2, characterized in that: the protective shell (101) is further fixedly provided with a driving motor (104), an output shaft of the driving motor (104) is fixedly provided with a belt wheel (106), and the belt wheel (106) is in transmission connection with a belt wheel ring (115) through a belt (110).

4. The quick tool changing device of a graphite processing machine tool according to claim 3, characterized in that: the belt wheel (106) is laterally provided with a first extrusion wheel (105) for extruding a belt (110), the belt (110) is provided with a second extrusion wheel (111) for extruding the belt (110) at any position of a tangent point of a belt wheel ring (115), the first extrusion wheel (105) and the second extrusion wheel (111) are rotatably installed on different extrusion wheel supports (107), and the two extrusion wheel supports (107) are both slidably installed on the protective cover (103) through extrusion wheel support sliding rods (108).

5. The quick tool changing device of the graphite processing machine tool as claimed in claim 4, characterized in that: the top end of a return spring (210) is fixedly connected with a driving rack (208), the bottom end of the return spring (210) is fixedly connected with a clamping plate (201), a driven rack (206) is in gear engagement with an intermediate gear (207), the intermediate gear (207) is in gear engagement with the driving rack (208), the intermediate gear (207) is rotatably installed on the clamping plate (201) through a rack support (209), and the intermediate gear (207) and the driving rack (208) are slidably installed on the rack support (209).

6. The quick tool changer of a graphite processing machine tool as claimed in claim 5, characterized in that: the bearing block (312) is internally provided with a groove, the inner wall of the groove is slidably provided with a friction plate (313), and a friction pressure increasing spring (304) for providing pressure is fixedly arranged on the friction plate (313).

7. The quick tool changing device of a graphite processing machine tool according to claim 6, characterized in that: the bearing block (312) is rotatably connected with the top end of the clamping plate mounting shaft (303), and the end face of the clamping plate mounting shaft (303) is in friction connection with the end face of the friction plate (313).

8. The quick tool changer of a graphite processing machine tool according to claim 7, characterized in that: the device is characterized in that a rotating driven gear (308) is slidably mounted on the hexagonal prism (311), the rotating driven gear (308) is rotatably mounted on the protective cover (103), a rotating driving motor (307) is fixedly mounted on the protective cover (103), a rotating driving gear (306) is fixedly mounted on an output shaft of the rotating driving motor (307), and the rotating driving gear (306) is in gear engagement with the rotating driven gear (308).

9. The quick tool changer of a graphite processing machine tool as claimed in claim 8, characterized in that: a projection clamped with the knife handle (4) is arranged inside the knife handle installation barrel (116), and the inner wall of the knife handle installation barrel (116) is made of rubber.

10. The quick tool changer of a graphite processing machine tool according to claim 9, characterized in that: the clamping plate (201) is fixedly installed on a clamping plate installation shaft (303), a clamping plate limiting frame (211) is sleeved on the clamping plate installation shaft (303), and the clamping plate limiting frame (211) is fixedly installed on the protective cover (103).