CN112775787A

CN112775787A - Mould repairing machine tool

Info

Publication number: CN112775787A
Application number: CN202110004302.6A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-04
Filing date: 2021-01-04
Publication date: 2021-05-11

Abstract

The invention discloses a mould repairing machine tool, which comprises a positioning frame mechanism and a trimming head mechanism, wherein the positioning frame mechanism has six spatial degrees of freedom, each movable joint is provided with a graduated scale, the trimming head mechanism can carry out accurate spatial positioning, the trimming head mechanism is tightly installed at the tail end of the positioning frame mechanism and is used for repairing the surface of a mould, the trimming head mechanism has a fast-slow gear function, a fast gear is adopted during idle stroke, the moving time of a polishing head can be shortened, a slow gear is adopted during trimming the surface of the mould, the processing quality of the surface of the mould can be improved, the fast-slow gear switching is realized by changing the position of a deflector rod, a transmission structure is a fixed-shaft gear train during slow gear, a transmission structure is a differential gear train during fast gear, a transmission structure of a worm and gear is adopted inside the trimming head mechanism, the transmission is stable in transmission, the self-locking function is also realized, and the reaction force of the surface of the mould to the polishing head can not react on, therefore, the surface of the die can be smoothly trimmed by rotating the hand wheel.

Description

Mould repairing machine tool

Technical Field

The invention relates to the field of machining, in particular to a mould repairing machine tool.

Background

Molds play an extremely important role in modern industry, and the quality of a mold directly determines the quality of a product. The mold industry in China is rapidly developed in recent years and ascends three mold production countries in the world, but the mold industry in China has a larger difference compared with the production level of foreign advanced molds, and the difference is mainly expressed in the aspects of long manufacturing period, low manufacturing precision, short service life of the molds and the like, wherein the problem of short service life of the molds is particularly prominent, and the resource waste and the production cost are directly increased, so that the failed molds are repaired and reused, the service time of the molds is prolonged, unnecessary loss in production is recovered, the development of industry and national economy is greatly promoted, and the mold industry has remarkable economic benefit and social significance.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a die repairing machine tool which is novel in structure and convenient to use.

The technical scheme adopted by the invention is as follows: the utility model provides a lathe is restoreed to mould, includes locating rack mechanism and repaiies first mechanism, its characterized in that: the positioning frame mechanism has six spatial degrees of freedom, each movable joint is provided with a graduated scale, and the trimming head mechanism is fixedly arranged at the tail end of the positioning frame mechanism and used for repairing the surface of the mold.

Preferably, the positioning frame mechanism comprises a base, a positioning sleeve, a sliding sleeve, an upright post, a second screw, a thimble sleeve, a fourth screw, a cross arm, a third screw, a first screw, a sixth screw, a swinging frame, a swinging rod, a fifth screw, a nut and a swinging head, wherein the base is fixedly arranged on the ground, the upright post is fixedly connected with the base, the sliding sleeve can move and rotate on the upright post through the pointer sleeve and is locked by the third screw, the positioning sleeve and the first screw are convenient for realizing the height positioning of the sliding sleeve, the cross arm and the sliding sleeve form a rotating pair and are locked by the second screw, the transverse swinging rod can form a rotating pair with the cross arm and is locked by the fourth screw, the swinging frame and the swinging rod form a rotating pair and is locked by the fifth screw, and the swinging head and the swinging frame form a rotating pair and is locked by the sixth screw.

Preferably, the trimming head mechanism is fixedly connected with the tail end of the positioning frame mechanism and comprises a shell, an inner gear, a moving shaft, a motor, a clamping piece, a polishing head, a planet carrier, a planet wheel, a center wheel, a first worm wheel, a second worm wheel, a first worm, a second worm, a deflector rod, a shift shaft, a transmission cone wheel, a spring, a first chain, a main chain wheel, a hand wheel, a first chain wheel, a slave chain wheel, a second chain wheel and a second chain, wherein the shell is a supporting main body, and the feeding and retreating of the polishing head can be realized by rotating the hand wheel, so that the surface of the mold is trimmed; when the drive is in slow gear, the hand wheel realizes the slow feed and retreat of the polishing head through a drive mechanism consisting of a main chain wheel, a first chain wheel, a first worm wheel, a central wheel, a planet wheel, an internal gear and a moving shaft; during fast gear transmission, the hand wheel realizes the fast feeding and the fast backing of the polishing head through a transmission mechanism consisting of an inner gear, a moving shaft, a planet carrier, a planet wheel, a center wheel, a first worm wheel, a second worm wheel, a first worm, a second worm, a transmission conical wheel, a first chain, a main chain wheel, a first chain wheel, a secondary chain wheel, a second chain wheel and a second chain; the shifting rod realizes the switching between a fast gear and a slow gear through a gear shifting shaft and a spring, and the motor drives the grinding head to rotate through the clamping piece.

Preferably, the base is fixedly installed on the ground through foundation bolts to provide stable support for the positioning frame mechanism, the lower end of the upright post is fixedly installed on the upper side of the base through screws and enables the upright post to be kept in a vertical state, the front side surface of the upright post is provided with first scales, the left side of the upright post is vertically provided with a guide groove, the needle sleeve is of an open cylindrical structure, the upper end of the needle sleeve is provided with a third pointer, the inner side of the needle sleeve is longitudinally provided with a guide strip, the needle sleeve and the upright post are coaxially installed, the guide strip is installed in the guide groove, so that the needle sleeve and the upright post form a moving pair, the upper end of the sliding sleeve is provided with third scales, the left side of the sliding sleeve is provided with a fan-shaped structure, the fan-shaped structure is provided with second scales and an arc-shaped hole, a longitudinal opening formed in the right side of the sliding sleeve can be installed on the outer side of the needle sleeve and form a rotating pair, thereby realize the rotation locking and the high location of slip commentaries on classics cover, the position sleeve is opening ring shape structure, and the position sleeve can slide on the stand with stand coaxial arrangement, is equipped with the recess on the plane of position sleeve upper end, is convenient for read first scale, screws up first screw and can realize the fixed of position sleeve on the stand.

Preferably, because the accessory connecting part of the sliding sleeve is heavy and is not convenient for directly and accurately positioning the height, when the height of the sliding sleeve needs to be adjusted, the first screw is firstly unscrewed, the positioning sleeve is moved to enable the upper end plane of the positioning sleeve to move to the target scale, the first screw is locked to enable the positioning sleeve to be fastened on the upright post, then the two third screws are unscrewed, the sliding sleeve is moved downwards to enable the lower end surface of the sliding sleeve to be tightly attached to the upper end plane of the positioning sleeve, and the two third screws are locked, so that the height accurate adjustment of the sliding sleeve is completed.

Preferably, the left end of the cross arm is of an open structure and is provided with a second pointer, the right end of the cross arm is provided with a cross arm disc and a fourth pointer, the left side of the cross arm and the sliding sleeve form a rotating pair, a second screw can penetrate through an arc-shaped hole in the left side of the sliding sleeve to enable the left end of the cross arm to clamp a sector structure in the left side of the sliding sleeve, so that the rotation locking of the cross arm is realized, the rotating angle of the cross arm relative to the sliding sleeve can be indicated on a second scale by the second pointer, three arc-shaped holes are uniformly distributed in the circumferential direction on the cross arm disc, the upper end of the yaw rod is provided with an upper scale, the upper scale is provided with a fourth scale and three threaded holes uniformly distributed in the circumferential direction, the upper scale can form a rotating pair with the cross arm disc and can be locked by three fourth screws, the rotating angle of the yaw rod relative to the cross arm can be indicated on, the left side of the swing frame is provided with a swing frame disc and a fifth pointer, the upper side of the swing frame disc is provided with a sixth pointer, three arc-shaped holes are uniformly distributed on the swing frame disc in the circumferential direction, the swing frame disc and the lower dial form a revolute pair and can be locked by three fifth screws, the rotation angle of the swing frame relative to the transverse swing rod can be indicated on a fifth scale by the fifth pointer, the upper end of the swing head is of a semi-circular plate structure, the semi-circular plate structure is provided with sixth scales and the arc-shaped holes, the semi-circular plate structure and the right side of the swing frame form a revolute pair, the sixth screw penetrates through the arc-shaped hole on the semi-circular plate structure and forms a thread pair with the swing frame, the rotation of the swing head relative to the swing frame can be locked by screwing the sixth screw, the rotation angle of the swing head relative to the swing frame can be indicated on the sixth scales by the sixth pointer, the lower end of the swing head is provided with a thread pair, for locking the expansion device.

Preferably, the right end of the shell is provided with an internal spline, the left end of the shell is provided with a threaded hole, the threaded hole and the threaded rod form a threaded pair and form a double-nut anti-loose structure through nut locking, so that the fastening connection of the trimming head mechanism and the tail end of the positioning frame mechanism is realized, the left end of the internal gear is provided with an internal gear ring structure, the right end of the internal gear is provided with a threaded shaft, the internal gear is arranged in the shell and forms a rotating pair with the shell through two bearings, the internal gear is arranged in the shell and forms a gear structure, the central wheel is arranged in the shell and forms a rotating pair with the shell through two bearings, the first worm wheel is coaxially arranged at the left end of the central wheel and realizes the fastening connection of the internal gear and the shell through a round nut, the first worm is vertically arranged in the shell and forms a rotating pair, the first, the three planet gears are respectively arranged on the three short shafts to form a revolute pair, the left end of the planet carrier is provided with a central shaft, the central shaft is coaxially arranged inside the central wheel through two bearings to form the revolute pair, the three planet gears are arranged between the internal gear and the central wheel and are in gear engagement with the internal gear and the central wheel, so that the internal gear, the central wheel and the three planet gears form a differential gear train, the second worm gear is coaxially arranged at the left end of the central shaft and is in fastening connection through a round nut, the second worm is vertically arranged inside the shell to form the revolute pair, and the second worm is in gear engagement with the second worm gear to form a worm.

Preferably, the polishing head is tightly connected with the output shaft of the motor through a clamping piece, the motor is fixedly installed at the right end of the moving shaft, an external spline arranged at the left end of the moving shaft is matched and installed with an internal spline at the right end of the shell, so that the moving shaft and the shell form a moving pair, a threaded hole arranged in the moving shaft is matched and installed with the threaded shaft to form a threaded transmission structure, and the internal gear can drive the moving shaft to move after rotating through the threaded shaft, so that feeding and retreating actions of the polishing head are realized.

Preferably, the hand wheel is mounted on the upper side of the shell to form a rotation pair, the main chain wheel is coaxially and tightly connected with the lower end of the hand wheel, the lower end face of the main chain wheel is in a conical surface structure, the first chain wheel is coaxially and tightly connected with the upper end of the first worm, a first chain is mounted between the main chain wheel and the first chain wheel, the auxiliary chain wheel is coaxially mounted with the main chain wheel and positioned below the main chain wheel and forms a rotation pair with the shell, the upper end face of the auxiliary chain wheel is in a conical surface structure, the second chain wheel is coaxially and tightly connected with the upper end of the second worm, and a second chain is mounted between the auxiliary.

Preferably, the left end of the shell is transversely provided with a slide way, the gear shifting shaft is arranged in the slide way to form a sliding pair with the shell, the transmission cone pulley is arranged at the right end of the gear shifting shaft to form a rotating pair, a spring is arranged between the gear shifting shaft and the shell, and the upper end of the shift lever and the right end of the gear shifting shaft form a rotating pair.

In the initial state, the deflector rod is in a downward pulling position, the transmission cone pulley is not in contact with the conical surface at the lower end of the main chain wheel and the conical surface at the upper end of the auxiliary chain wheel, and the transmission cone pulley is in a slow gear position at the moment, and the micro-feeding and the retreating of the polishing head can be realized by rotating the hand wheel; after the shifting lever is pulled upwards to a horizontal position, the shifting shaft moves rightwards under the action of the elastic force of the spring, the transmission cone pulley is in contact with the conical surface at the lower end of the main chain wheel and the conical surface at the upper end of the driven chain wheel, and at the moment, the shifting lever is in a fast shift position, and the rapid feeding and the retreating of the polishing head can be realized by rotating the hand wheel.

Preferably, the motor drives the sanding head to rotate, thereby achieving the surface finish of the mold.

Preferably, the clamping piece can be used for tightly connecting the polishing head with the output shaft of the motor, and the polishing head can be taken down and replaced by other types of polishing heads according to the material and the surface characteristics of the die after the clamping piece is unscrewed.

When the surface of the die is repaired, firstly, the height of a sliding sleeve in a positioning frame mechanism and the rotation amount of each joint need to be adjusted, so that a polishing head is aligned to the position of the surface of the die to be corrected, and then a hand wheel is rotated to feed the polishing head forward, so that the repair of the surface of the die is gradually completed.

When the trimming head mechanism is in a slow gear state, the deflector rod is in a downward pulling position, the transmission between the main chain wheel and the auxiliary chain wheel is disconnected, the auxiliary chain wheel is always kept in a static state, the second worm and the second worm wheel do not rotate, and the worm and gear transmission has a self-locking property, so that the planet carrier is kept static, and the central wheel, the inner gear and the three planet wheels form a dead axle gear train; when the polishing head is in a slow gear state, the hand wheel is rotated clockwise, the main chain wheel drives the first chain wheel and the first worm to rotate clockwise through the first chain, the first worm drives the first worm wheel to rotate anticlockwise, the central wheel rotates anticlockwise, the inner gear rotates clockwise at a slow speed under the transmission action of the three planet wheels, the inner gear pushes the moving shaft to move slowly rightwards through the threaded shaft, the micro-feeding of the polishing head is realized, and the micro-retreating of the polishing head can be realized by reversely rotating the hand wheel; because the worm and gear transmission structure formed by the first worm and the first worm gear has self-locking property, when the grinding head trims the mold, the reaction force of the surface of the mold to the grinding head can not react on the hand wheel through the transmission mechanism, so that the surface of the mold can be smoothly trimmed and processed by rotating the hand wheel.

When the trimming head mechanism is in a fast gear state, the deflector rod is in a horizontal pulling position, and the main chain wheel and the driven chain wheel can be driven through the transmission conical wheel; during the fast shelves state, clockwise rotation hand wheel, then the main sprocket drives first sprocket and first worm clockwise rotation through first chain, first worm drives first worm wheel anticlockwise rotation, then centre wheel anticlockwise rotation, and meanwhile, clockwise pivoted main sprocket passes through the transmission cone pulley drive from sprocket anticlockwise rotation, from the sprocket and drive second sprocket and second worm anticlockwise rotation through the second chain, second worm drives second worm wheel clockwise rotation, then the planet carrier drives three planet wheel and carries out the revolution, the centre wheel, internal gear and three planet wheel constitute differential gear train, the internal gear clockwise fast turn this moment, then the internal gear passes through the screw axis and promotes the removal axle right fast movement, realize the fast feed of polishing head, the quick retreat of polishing head can be realized to the contra-rotation hand wheel.

The invention has the beneficial effects that:

firstly, the positioning frame mechanism has six spatial degrees of freedom and great flexibility, and the trimming head mechanism can trim the surface of any position and any angle on the die;

each movable joint of the positioning frame mechanism is provided with scale display, so that the head trimming mechanism can be accurately positioned in space;

each movable joint of the positioning frame mechanism is convenient to adjust, and electrified equipment is not adopted, so that the positioning frame mechanism is reliable in connection and positioning, low in failure rate, effective in reducing the manufacturing cost and beneficial to large-scale popularization and application;

the trimming head mechanism has a fast-slow gear function, a fast gear is adopted during idle stroke, the moving time of a polishing head can be shortened, and a slow gear is adopted during trimming of the surface of the die, so that the processing quality of the surface of the die can be improved;

the fast and slow gear switching of the head trimming mechanism is realized by changing the position of a deflector rod so as to change a transmission structure, when the head trimming mechanism is in a slow gear, the transmission structure is a fixed-axis gear train, when the head trimming mechanism is in a fast gear, the transmission structure is a differential gear train, and the fast and slow gear is novel in structure, fast in switching and convenient to use;

sixthly, the trimming head mechanism is internally provided with a transmission structure of a worm gear and a worm, so that the transmission is stable, the self-locking function is realized, the reaction force of the surface of the die to the polishing head cannot react on the hand wheel through the transmission mechanism, and the surface of the die can be trimmed and processed stably by rotating the hand wheel.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the overall structure of the present invention.

Fig. 3 is a schematic overall structure diagram of the positioning frame mechanism.

Fig. 4 is an exploded view of the positioner mechanism.

Fig. 5 is a partial schematic view of the carriage mechanism.

Fig. 6 is a partial schematic view of the carriage mechanism.

Fig. 7 is a schematic view of the overall structure of the dressing head mechanism.

Fig. 8 is a schematic longitudinal sectional view of the dressing head mechanism in a slow-shift state.

Fig. 9 is a schematic longitudinal sectional view of the trimming head mechanism in the fast-shift state.

Fig. 10 is a schematic diagram of a transverse cross-sectional structure of the trimming head mechanism.

Fig. 11 is a schematic diagram of a transverse cross-sectional structure of the trimming head mechanism.

Fig. 12 is an exploded view of the dressing head mechanism.

Fig. 13 is a schematic structural view of an internal gear.

Fig. 14 is a schematic structural view of the carrier.

Fig. 15 is a schematic structural view of the center wheel.

Reference numerals: 1 positioning frame mechanism, 101 base, 102 positioning sleeve, 103 sliding sleeve, 103.1 second scale, 103.2 third scale, 104 upright post, 104.1 first scale, 104.2 guide groove, 105 second screw, 106 needle sleeve, 106.1 third pointer, 107 fourth screw, 108 cross arm, 108.1 cross arm disc, 108.2 fourth pointer, 108.3 second pointer, 109 third screw, 110 first screw, 111 sixth screw, 112 swinging frame, 112.1 sixth pointer, 112.2 swinging frame disc, 112.3 fifth pointer, 113 swinging rod, 113.1 upper scale, 113.2 lower scale, 114 fifth screw, 115 nut, 116 swinging head, 116.1 sixth scale, 116.2 threaded rod;

2 trimming head mechanism, 201 shell, 201.1 internal spline, 201.2 threaded hole, 202 internal gear, 202.1 threaded shaft, 203 moving shaft, 204 motor, 204.1 clamping piece, 204.2 grinding head, 205 planet carrier, 205.1 short shaft, 205.2 central shaft, 206 planet wheel, 207 central wheel, 208 first worm wheel, 209 second worm wheel, 210 first worm, 211 second worm, 212 shift lever, 213 shift shaft, 214 transmission cone wheel, 215 spring, 216 first chain, 217 main chain wheel, 218 hand wheel, 219 first chain wheel, 220 slave chain wheel, 221 second chain wheel and 222 second chain.

Detailed Description

The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 and 2, a mold repairing machine tool includes a positioning frame mechanism 1 and a trimming head mechanism 2, and is characterized in that: the positioning frame mechanism 1 has six spatial degrees of freedom, each movable joint is provided with a graduated scale, and the trimming head mechanism 2 is fixedly arranged at the tail end of the positioning frame mechanism 1 and used for repairing the surface of the mold.

As shown in fig. 3 and 4, the positioning frame mechanism 1 includes a base 101, a positioning sleeve 102, a sliding sleeve 103, a column 104, a second screw 105, a pointer sleeve 106, a fourth screw 107, a cross arm 108, a third screw 109, a first screw 110, a sixth screw 111, a swing frame 112, a yaw rod 113, a fifth screw 114, a nut 115, and a swing head 116, wherein the base 101 is fixedly mounted on the ground, the column 104 is fixedly connected with the base 101, the sliding sleeve 103 can move and rotate on the column 104 through the pointer sleeve 106 and is locked by the third screw 109, the positioning sleeve 102 and the first screw 110 facilitate height positioning of the sliding sleeve 103, the cross arm 108 and the sliding sleeve 103 form a rotation pair and is locked by the second screw 105, the yaw rod 113 and the cross arm 108 form a rotation pair and is locked by the fourth screw 107, the swing frame 112 and the yaw rod 113 form a rotation pair and is locked by the fifth screw 114, the swing head 116 may form a rotation pair with the swing frame 112 and be locked by the sixth screw 111.

As shown in fig. 7, 8 and 12, the trimming head mechanism 2 is fixedly connected with the end of the positioning frame mechanism 1, and comprises a housing 201, an inner gear 202, a moving shaft 203, a motor 204, a clamping member 204.1, a polishing head 204.2, a planet carrier 205, a planet wheel 206, a center wheel 207, a first worm wheel 208, a second worm wheel 209, a first worm 210, a second worm 211, a shift lever 212, a shift shaft 213, a transmission bevel wheel 214, a spring 215, a first chain 216, a main chain wheel 217, a hand wheel 218, a first chain wheel 219, a slave chain wheel 220, a second chain wheel 221 and a second chain 222, wherein the housing 201 is a supporting body, and the feeding and retreating of the polishing head 204.2 can be realized by rotating the hand wheel 218, so as to realize the trimming of the surface of the mold; during slow gear transmission, the hand wheel 218 realizes slow feeding and retreating of the polishing head 204.2 through a transmission mechanism consisting of a main chain wheel 217, a first chain 216, a first chain wheel 219, a first worm 210, a first worm wheel 208, a central wheel 207, a planet wheel 206, an internal gear 202 and a moving shaft 203; during fast gear transmission, the hand wheel 218 realizes fast feeding and backing of the polishing head 204.2 through a transmission mechanism consisting of an inner gear 202, a moving shaft 203, a planet carrier 205, a planet wheel 206, a center wheel 207, a first worm wheel 208, a second worm wheel 209, a first worm 210, a second worm 211, a transmission bevel wheel 214, a first chain 216, a main chain wheel 217, a first chain wheel 219, a secondary chain wheel 220, a second chain wheel 221 and a second chain 222; the shifting lever 212 is switched between a fast gear and a slow gear through the shifting shaft 213 and the spring 215, and the motor 204 drives the grinding head 204.2 to rotate through the clamping piece 204.1.

As shown in fig. 3, 4, 5, and 6, the base 101 is fixedly mounted on the ground through anchor bolts to provide a stable support for the positioning frame mechanism 1, the lower end of the upright 104 is fixedly mounted on the upper side of the base 101 through screws to keep the upright 104 in a vertical state, the front side of the upright 104 is provided with a first scale 104.1, the left side of the upright 104 is vertically provided with a guide slot 104.2, the pointer sleeve 106 is an open cylindrical structure, the upper end of the pointer sleeve 106 is provided with a third pointer 106.1, the inner side of the pointer sleeve is longitudinally provided with a guide strip, the pointer sleeve 106 is coaxially mounted with the upright 104, and the guide strip is mounted in the guide slot 104.2, so that the pointer sleeve 106 and the upright 104 form a moving pair, the upper end of the sliding sleeve 103 is provided with a third scale 103.2, the left side of the sliding sleeve is provided with a fan-shaped structure, the fan-shaped structure is provided with a second scale 103.1 and an arc-, the rotation angle of the sliding sleeve 103 relative to the thimble sleeve 106 can be indicated by a third pointer 106.1 on a third scale 103.2, the two third screws 109 can enable the sliding sleeve 103 to clamp the thimble sleeve 106 and be fixed on the upright post 104, so as to realize rotation locking and height positioning of the sliding sleeve 103, the positioning sleeve 102 is of an open circular ring structure, the positioning sleeve 102 and the upright post 104 are coaxially installed and can slide on the upright post 104, a groove is arranged on the plane of the upper end of the positioning sleeve 102, so that the first scale 104.1 can be read conveniently, and the positioning sleeve 102 can be fixed on the upright post 104 by screwing the first screw 110.

When the height of the sliding sleeve 103 needs to be adjusted, the first screw 110 is firstly unscrewed, the positioning sleeve 102 is moved to move the upper end plane to the target scale, the first screw 110 is locked to fasten the positioning sleeve 102 on the upright post 104, then the two third screws 109 are unscrewed, the sliding sleeve 103 is moved downwards to enable the lower end plane to be tightly attached to the upper end plane of the positioning sleeve 102, and then the two third screws 109 are locked to finish the accurate height adjustment of the sliding sleeve 103.

The left end of the cross arm 108 is of an open structure and is provided with a second pointer 108.3, the right end of the cross arm 108 is provided with a cross arm disc 108.1 and a fourth pointer 108.2, the left side of the cross arm 108 and the sliding sleeve 103 form a rotation pair, the second screw 105 can penetrate through an arc hole on the left side of the sliding sleeve 103 to enable the left end of the cross arm 108 to clamp a sector structure on the left side of the sliding sleeve 103, so that the rotation locking of the cross arm 108 is realized, the rotation angle of the cross arm 108 relative to the sliding sleeve 103 can be indicated on a second scale 103.1 through the second pointer 108.3, three arc holes are uniformly distributed on the cross arm disc 108.1 in the circumferential direction, the upper end of the yaw rod 113 is provided with an upper scale 113.1, the upper scale 113.1 is provided with a fourth scale and three threaded holes uniformly distributed in the circumferential direction, the upper scale 113.1 can form a rotation pair with the cross arm disc 108.1 and can be locked through three fourth screws 107, the rotation angle of, the lower end of the horizontal swing rod 113 is provided with a lower dial 113.2, the lower dial 113.2 is provided with a fifth scale and three threaded holes which are uniformly distributed in the circumferential direction, the left side of the swing frame 112 is provided with a swing frame disc 112.2 and a fifth pointer 112.3, the upper side of the swing frame disc is provided with a sixth pointer 112.1, the upper side of the swing frame disc 112.2 is uniformly distributed with three arc-shaped holes in the circumferential direction, the swing frame disc 112.2 and the lower dial 113.2 can form a revolute pair and can be locked by three fifth screws 114, the rotating angle of the swing frame 112 relative to the horizontal swing rod 113 can be indicated on the fifth scale by the fifth pointer 112.3, the upper end of the swing head 116 is of a semicircular plate structure, the semicircular plate structure is provided with the sixth scale 116.1 and the arc-shaped holes, the semicircular plate structure and the right side of the swing frame 112 form a revolute pair, the sixth screw 111 passes through the arc-shaped holes on the semicircular plate structure and then forms a threaded pair with the swing frame 112, the sixth screw, the rotation angle of the swing head 116 relative to the swing frame 112 can be indicated on the sixth scale 116.1 by the sixth pointer 112.1, the lower end of the swing head 116 is provided with a threaded rod 116.2 for connecting the expansion device, and the nut 115 and the threaded rod 116.2 form a thread pair for locking the expansion device.

As shown in fig. 7 to 15, the right end of the outer casing 201 is provided with an internal spline 201.1, the left end is provided with a threaded hole 201.2, the threaded hole 201.2 and the threaded rod 116.2 form a threaded pair and are locked by the nut 115 to form a double-nut anti-loosening structure, so as to realize the fastening connection of the trimming head mechanism 2 and the tail end of the positioning frame mechanism 1, the left end of the internal gear 202 is provided with an internal gear ring structure, the right end is provided with a threaded shaft 202.1, the internal gear 202 is installed inside the outer casing 201 and forms a rotation pair with the outer casing 201 through two bearings, the inside of the center wheel 207 is of a hollow structure, the right end is of a gear structure, the center wheel 207 is installed inside the outer casing 201 and forms a rotation pair with the outer casing 201 through two bearings, a first worm wheel 208 is coaxially installed at the left end of the center wheel 207 and realizes the fastening connection with the outer casing 201 through a round nut, a first worm 210 is, three short shafts 205.1 are uniformly distributed at the right end of the planet carrier 205 in the circumferential direction, three planet wheels 206 are respectively mounted on the three short shafts 205.1 to form a rotation pair, a central shaft 205.2 is arranged at the left end of the planet carrier 205, the central shaft 205.2 is coaxially mounted inside the central wheel 207 through two bearings to form a rotation pair, the three planet wheels 206 are mounted between the internal gear 202 and the central wheel 207 and are in gear engagement with the two rear wheels, so that the internal gear 202, the central wheel 207 and the three planet wheels 206 form a differential gear train, a second worm wheel 209 is coaxially mounted at the left end of the central shaft 205.2 and is fastened and connected through a round nut, a second worm 211 is vertically mounted inside the housing 201 to form a rotation pair, and the second worm 211 is engaged with the second worm wheel 209 to form.

The polishing head 204.2 is fixedly connected with an output shaft of the motor 204 through a clamping piece 204.1, the motor 204 is fixedly installed at the right end of the movable shaft 203, an external spline arranged at the left end of the movable shaft 203 is matched and installed with an internal spline 201.1 at the right end of the shell 201, so that the movable shaft 203 and the shell 201 form a movable pair, a threaded hole arranged in the movable shaft 203 is matched and installed with the threaded shaft 202.1 to form a threaded transmission structure, and the internal gear 202 can drive the movable shaft 203 to move through the threaded shaft 202.1 after rotating, so that the feeding and retreating actions of the polishing head 204.2 are realized.

The hand wheel 218 is arranged on the upper side of the shell 201 and forms a rotation pair, the main chain wheel 217 is coaxially and tightly connected with the lower end of the hand wheel 218, the lower end face of the main chain wheel 217 is in a conical surface structure, the first chain wheel 219 is coaxially and tightly connected with the upper end of the first worm 210, a first chain 216 is arranged between the main chain wheel 217 and the first chain wheel 219, the auxiliary chain wheel 220 is coaxially arranged with the main chain wheel 217 and positioned below the main chain wheel 217 and forms a rotation pair with the shell 201, the upper end face of the auxiliary chain wheel 220 is in a conical surface structure, the second chain wheel 221 is coaxially and tightly connected with the upper end of the second worm 211, and a second chain 222 is arranged between the auxiliary.

The left end of the shell 201 is transversely provided with a slide way, the shift shaft 213 is arranged in the slide way to form a moving pair with the shell 201, the transmission cone pulley 214 is arranged at the right end of the shift shaft 213 to form a rotating pair, a spring 215 is arranged between the shift shaft 213 and the shell 201, and the upper end of the shift lever 212 and the right end of the shift shaft 213 form a rotating pair.

In an initial state, the shift lever 212 is in a downward pulling position, the transmission cone pulley 214 is not in contact with the conical surface at the lower end of the main chain wheel 217 and the conical surface at the upper end of the auxiliary chain wheel 220, and at the time, the slow gear position is realized, and the micro-feeding and the retreating of the polishing head 204.2 can be realized by rotating the hand wheel 218; after the shift lever 212 is pulled upwards to a horizontal position, the shift shaft 213 moves rightwards under the action of the elastic force of the spring 215, the transmission cone pulley 214 is in contact with the conical surface at the lower end of the main chain wheel 217 and the conical surface at the upper end of the auxiliary chain wheel 220, at the moment, the fast feeding and the retreating of the polishing head 204.2 can be realized by rotating the hand wheel 218 at a fast shift position.

The motor 204 may drive the sanding head 204.2 to rotate, thereby effecting a finish on the mold surface.

The clamping piece 204.1 can tightly connect the polishing head 204.2 with the output shaft of the motor 204, and after the clamping piece 204.1 is loosened, the polishing head 204.2 can be taken down and other types of polishing heads can be replaced according to the material and the surface characteristics of the mold.

When the surface of the mold is modified, firstly, the height of the sliding sleeve 103 in the positioning frame mechanism 1 and the rotation amount of each joint need to be adjusted, so that the polishing head 204.2 is aligned to the position of the surface of the mold to be modified, and then the hand wheel 218 is rotated to feed the polishing head 204.2 forward, so that the surface of the mold is gradually repaired.

When the trimming head mechanism 2 is in a slow gear state, the shift lever 212 is in a downward pulling position, the transmission between the main chain wheel 217 and the auxiliary chain wheel 220 is disconnected, the auxiliary chain wheel 220 is always kept in a static state, the second worm 211 and the second worm wheel 209 do not rotate, the planet carrier 205 is kept static due to the self-locking property of worm and gear transmission, and the central wheel 207, the inner gear 202 and the three planet wheels 206 form a dead axle gear train; in a slow gear state, the hand wheel 218 is rotated clockwise, the main chain wheel 217 drives the first chain wheel 219 and the first worm 210 to rotate clockwise through the first chain 216, the first worm 210 drives the first worm wheel 208 to rotate counterclockwise, the central wheel 207 rotates counterclockwise, the internal gear 202 rotates clockwise at a slow speed under the transmission action of the three planet wheels 206, the internal gear 202 pushes the moving shaft 203 to move slowly rightwards through the threaded shaft 202.1, the micro-feeding of the polishing head 204.2 is realized, and the hand wheel 218 is rotated reversely to realize the micro-retreating of the polishing head 204.2; because the worm and gear transmission structure formed by the first worm 210 and the first worm gear 208 has a self-locking property, when the grinding head 204.2 is used for finishing the mold, the reaction force of the mold surface on the grinding head 204.2 cannot be reacted to the hand wheel 218 through the transmission mechanism, so that the mold surface can be smoothly finished by rotating the hand wheel 218.

When the trimming head mechanism 2 is in a fast gear state, the shift lever 212 is in a horizontal pulling position, and the main chain wheel 217 and the auxiliary chain wheel 220 can be driven by the transmission conical wheel 214; in the fast gear state, when the hand wheel 218 is rotated clockwise, the main chain wheel 217 drives the first chain wheel 219 and the first worm 210 to rotate clockwise via the first chain 216, the first worm 210 drives the first worm gear 208 to rotate counterclockwise, the center wheel 207 rotates counterclockwise, and at the same time, the clockwise-rotating main sprocket 217 drives the slave sprocket 220 to rotate counterclockwise through the transmission bevel wheel 214, the slave sprocket 220 drives the second sprocket 221 and the second worm gear 211 to rotate counterclockwise through the second chain 222, the second worm gear 211 drives the second worm wheel 209 to rotate clockwise, the planet carrier 205 drives the three planet gears 206 to revolve, the central gear 207, the internal gear 202 and the three planet gears 206 form a differential gear train, at this time, the internal gear 202 rotates clockwise rapidly, the internal gear 202 pushes the moving shaft 203 to move rapidly to the right through the threaded shaft 202.1, so that the polishing head 204.2 can be fed rapidly, and the hand wheel 218 is rotated reversely so that the polishing head 204.2 can be retracted rapidly.

The references to "front", "back", "left", "right", etc., are to be construed as references to orientations or positional relationships based on the orientation or positional relationship shown in the drawings or as orientations and positional relationships conventionally found in use of the product of the present invention, and are intended to facilitate the description of the invention and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Claims

1. The utility model provides a lathe is restoreed to mould, includes locating rack mechanism (1) and repaiies first mechanism (2), its characterized in that: the positioning frame mechanism (1) has six spatial degrees of freedom, each movable joint is provided with a graduated scale, and the trimming head mechanism (2) is fixedly arranged at the tail end of the positioning frame mechanism (1) and used for repairing the surface of the mold;

the positioning frame mechanism (1) comprises a base (101), a positioning sleeve (102), a sliding sleeve (103), an upright post (104), a second screw (105), a pointer sleeve (106), a fourth screw (107), a cross arm (108), a third screw (109), a first screw (110), a sixth screw (111), a swinging frame (112), a swinging rod (113), a fifth screw (114), a nut (115) and a swinging head (116), wherein the base (101) is fixedly arranged on the ground, the upright post (104) is fixedly connected with the base (101), the sliding sleeve (103) can move and rotate on the upright post (104) through the pointer sleeve (106) and is locked by the third screw (109), the positioning sleeve (102) and the first screw (110) are convenient for realizing the height positioning of the sliding sleeve (103), the cross arm (108) and the sliding sleeve (103) form a rotating pair, and are locked by the second screw (105), the transverse swing rod (113) and the cross arm (108) can form a rotation pair and are locked by a fourth screw (107), the swing frame (112) and the transverse swing rod (113) can form a rotation pair and are locked by a fifth screw (114), and the swing head (116) and the swing frame (112) can form a rotation pair and are locked by a sixth screw (111);

the trimming head mechanism (2) is fixedly connected with the tail end of the positioning frame mechanism (1) and comprises a shell (201), an inner gear (202), a moving shaft (203), a motor (204), a clamping piece (204.1), a polishing head (204.2), a planet carrier (205), a planet wheel (206), a center wheel (207), a first worm wheel (208), a second worm wheel (209), a first worm (210), a second worm (211), a shifting lever (212), a shifting shaft (213), a transmission cone wheel (214), a spring (215), a first chain (216), a main chain wheel (217), a hand wheel (218), a first chain wheel (219), a slave chain wheel (220), a second chain wheel (221) and a second chain (222), wherein the shell (201) is a supporting main body, and the polishing head (204.2) can be fed and retracted by rotating the hand wheel (218), so that the surface of a mold can be trimmed; during slow gear transmission, the hand wheel (218) realizes slow feeding and retreating of the polishing head (204.2) through a transmission mechanism consisting of a main chain wheel (217), a first chain (216), a first chain wheel (219), a first worm (210), a first worm wheel (208), a central wheel (207), a planet wheel (206), an inner gear (202) and a moving shaft (203); during fast gear transmission, a hand wheel (218) realizes rapid feeding and retreating of a polishing head (204.2) through a transmission mechanism formed by an inner gear (202), a moving shaft (203), a planet carrier (205), a planet wheel (206), a central wheel (207), a first worm wheel (208), a second worm wheel (209), a first worm (210), a second worm (211), a transmission bevel wheel (214), a first chain (216), a main chain wheel (217), a first chain wheel (219), a slave chain wheel (220), a second chain wheel (221) and a second chain (222); the shifting rod (212) realizes the switching between a fast gear and a slow gear through the shifting shaft (213) and the spring (215), and the motor (204) drives the grinding head (204.2) to rotate through the clamping piece (204.1).

2. A mold repair machine according to claim 1, characterized in that: the base (101) is fixedly arranged on the ground through foundation bolts and provides stable support for the positioning frame mechanism (1), the lower end of the upright post (104) is fixedly arranged on the upper side of the base (101) through screws and enables the upright post (104) to keep a vertical state, the front side surface of the upright post (104) is provided with a first scale (104.1), the left side of the upright post (104) is vertically provided with a guide groove (104.2), the pointer sleeve (106) is of an open cylindrical structure, the upper end of the pointer sleeve is provided with a third pointer (106.1), the inner side of the third pointer is longitudinally provided with a guide bar, the pointer sleeve (106) and the upright post (104) are coaxially arranged, the guide bar is arranged in the guide groove (104.2), so that the pointer sleeve (106) and the upright post (104) form a moving pair, the upper end of the sliding sleeve (103) is provided with a third scale (103.2), the left side of the sliding sleeve is provided with a fan-shaped structure, the fan-shaped structure is provided with a second scale (103.1) and an arc, the rotating angle of the sliding sleeve (103) relative to the pointer sleeve (106) can be indicated on a third scale (103.2) by a third pointer (106.1), the sliding sleeve (103) can be clamped by two third screws (109) and fixed on the pointer sleeve (106) on the upright post (104) so as to realize the rotation locking and height positioning of the sliding sleeve (103), the positioning sleeve (102) is of an open circular ring structure, the positioning sleeve (102) and the upright post (104) are coaxially mounted and can slide on the upright post (104), a groove is formed in the plane of the upper end of the positioning sleeve (102) so as to facilitate reading of the first scale (104.1), and the fixing of the positioning sleeve (102) on the upright post (104) can be realized by screwing the first screw (110);

because the weight of the accessory connecting part of the sliding and rotating sleeve (103) is large, and accurate height positioning is not convenient to directly carry out, when the height of the sliding and rotating sleeve (103) needs to be adjusted, the first screw (110) is firstly unscrewed, the positioning sleeve (102) is moved to enable the upper end plane of the positioning sleeve to move to a target scale, the first screw (110) is locked, the positioning sleeve (102) is fastened on the upright post (104), then the two third screws (109) are unscrewed, the sliding and rotating sleeve (103) is moved downwards to enable the lower end plane of the sliding and rotating sleeve (103) to be tightly attached to the upper end plane of the positioning sleeve (102), and the two third screws (109) are locked, so that the accurate height adjustment of the sliding and rotating sleeve (103).

3. A mold repair machine according to claim 1, characterized in that: the left end of the cross arm (108) is of an open structure and is provided with a second pointer (108.3), the right end of the cross arm is provided with a cross arm disc (108.1) and a fourth pointer (108.2), the left side of the cross arm (108) and the sliding sleeve (103) form a rotation pair, a second screw (105) can penetrate through an arc-shaped hole in the left side of the sliding sleeve (103) to enable the left end of the cross arm (108) to clamp a sector structure in the left side of the sliding sleeve (103), so that the rotation locking of the cross arm (108) is realized, the rotation angle of the cross arm (108) relative to the sliding sleeve (103) can be indicated on a second scale (103.1) through the second pointer (108.3), three arc-shaped holes are uniformly distributed in the circumferential direction on the cross arm disc (108.1), an upper dial (113.1) is arranged at the upper end of the cross arm (113), a fourth scale and three threaded holes are uniformly distributed in the circumferential direction are arranged on the upper dial (113.1), the upper dial (113.1) can form a rotation pair with the, the rotating angle of the transverse swing rod (113) relative to the cross arm (108) can be indicated on a fourth scale by a fourth pointer (108.2), the lower end of the transverse swing rod (113) is provided with a lower dial (113.2), the lower dial (113.2) is provided with a fifth scale and three threaded holes which are uniformly distributed in the circumferential direction, the left side of the swing frame (112) is provided with a swing frame disc (112.2) and a fifth pointer (112.3), the upper side of the swing frame disc is provided with a sixth pointer (112.1), the upper side of the swing frame disc (112.2) is uniformly distributed with three arc-shaped holes in the circumferential direction, the swing frame disc (112.2) and the lower dial (113.2) can form a rotating pair and can be locked by three fifth screws (114), the rotating angle of the swing frame (112) relative to the transverse swing rod (113) can be indicated on the fifth scale by the fifth pointer (112.3), the upper end of the swing head (116) is in a semi-circular plate structure, the semi-circular plate structure and the rotating pair are arranged on the semi-circular plate structure and the swing frame (112), the sixth screw (111) penetrates through an arc-shaped hole in the semicircular plate structure and then forms a thread pair with the swing frame (112), the rotation of the swing head (116) relative to the swing frame (112) can be locked by screwing the sixth screw (111), the rotation angle of the swing head (116) relative to the swing frame (112) can be indicated on a sixth scale (116.1) by a sixth pointer (112.1), a threaded rod (116.2) is arranged at the lower end of the swing head (116) and used for connecting expansion equipment, and a nut (115) and the threaded rod (116.2) form a thread pair for locking the expansion equipment.

4. A mold repair machine according to claim 1, characterized in that: the right end of the shell (201) is provided with an internal spline (201.1), the left end is provided with a threaded hole (201.2), the threaded hole (201.2) and a threaded rod (116.2) form a thread pair and are locked by a nut (115) to form a double-nut anti-loosening structure, so that the fastening connection of the trimming head mechanism (2) and the tail end of the positioning frame mechanism (1) is realized, the left end of the internal gear (202) is provided with an inner gear ring structure, the right end of the internal gear (202) is provided with a threaded shaft (202.1), the internal gear (202) is arranged inside the shell (201) and forms a rotation pair with the shell (201) through two bearings, a first worm wheel (208) is coaxially arranged at the left end of the central wheel (207) and is fastened and connected with the shell (201) through a round nut, a first worm (210) is vertically arranged inside the shell (201) and forms a rotation pair, the first worm (210) is meshed with the first worm wheel (208) to form a worm and gear transmission structure, three short shafts (205.1) are uniformly distributed at the right end of a planet carrier (205) in the circumferential direction, three planet wheels (206) are respectively mounted on the three short shafts (205.1) to form a rotation pair, a central shaft (205.2) is arranged at the left end of the planet carrier (205), the central shaft (205.2) is coaxially mounted inside the central wheel (207) through two bearings to form a rotation pair, the three planet wheels (206) are mounted between an inner gear (202) and the central wheel (207) and are meshed with the latter two gears to form a differential gear train, a second worm wheel (209) is coaxially mounted at the left end of the central shaft (205.2) and is fastened and connected through a round nut, and the second worm (211) is vertically mounted inside a shell (201) to form a rotation pair, the second worm (211) is meshed with the second worm wheel (209) to form a worm and gear transmission structure;

the polishing head (204.2) is fixedly connected with an output shaft of the motor (204) through a clamping piece (204.1), the motor (204) is fixedly installed at the right end of the moving shaft (203), an external spline arranged at the left end of the moving shaft (203) is matched and installed with an internal spline (201.1) at the right end of the shell (201), so that the moving shaft (203) and the shell (201) form a moving pair, a threaded hole formed in the moving shaft (203) is matched and installed with the threaded shaft (202.1) to form a threaded transmission structure, and the internal gear (202) can drive the moving shaft (203) to move through the threaded shaft (202.1) after rotating, so that the feeding and retreating actions of the polishing head (204.2) are realized.

5. A mold repair machine according to claim 1, characterized in that: the hand wheel (218) is arranged on the upper side of the shell (201) to form a rotation pair, the main chain wheel (217) is coaxially and fixedly connected with the lower end of the hand wheel (218), the lower end face of the main chain wheel (217) is of a conical surface structure, the first chain wheel (219) is coaxially and fixedly connected with the upper end of the first worm (210), a first chain (216) is arranged between the main chain wheel (217) and the first chain wheel (219), the auxiliary chain wheel (220) is coaxially arranged with the main chain wheel (217) and is positioned below the main chain wheel, the auxiliary chain wheel and the shell (201) form a rotation pair, the upper end face of the auxiliary chain wheel (220) is of a conical surface structure, the second chain wheel (221) is coaxially and fixedly connected with the upper end of the second worm (211), and a second chain (222) is arranged between the auxiliary chain wheel;

the left end of the outer shell (201) is transversely provided with a slide way, the shift shaft (213) is arranged in the slide way to form a moving pair with the outer shell (201), the transmission cone pulley (214) is arranged at the right end of the shift shaft (213) to form a rotating pair, a spring (215) is arranged between the shift shaft (213) and the outer shell (201), and the upper end of the shift lever (212) and the right end of the shift shaft (213) form a rotating pair;

in an initial state, the deflector rod (212) is in a downward pulling position, the transmission cone pulley (214) is not in contact with the conical surface at the lower end of the main chain wheel (217) and the conical surface at the upper end of the auxiliary chain wheel (220), and at the time, the deflector rod is in a slow-shift position, and the micro-feeding and the retreating of the polishing head (204.2) can be realized by rotating the hand wheel (218); after the shifting lever (212) is pulled upwards to a horizontal position, the shifting shaft (213) moves rightwards under the action of the elastic force of the spring (215), the transmission cone pulley (214) is in contact with the conical surface at the lower end of the main chain wheel (217) and the conical surface at the upper end of the auxiliary chain wheel (220), at the moment, the high-speed gear position is achieved, and the rapid feeding and retreating of the polishing head (204.2) can be achieved by rotating the hand wheel (218).

6. A mold repair machine according to claim 1, characterized in that: the motor (204) can drive the grinding head (204.2) to rotate, so that the surface of the die can be trimmed;

the clamping piece (204.1) can tightly connect the polishing head (204.2) with an output shaft of the motor (204), and the polishing head (204.2) can be taken down and replaced by other types of polishing heads according to the material and surface characteristics of the die after the clamping piece (204.1) is loosened;

when the surface of a die is trimmed, firstly, the height of a sliding sleeve (103) in a positioning frame mechanism (1) and the rotation amount of each joint need to be adjusted, so that a polishing head (204.2) is aligned to the position of the surface of the die, which needs to be corrected, and then a hand wheel (218) is rotated to feed the polishing head (204.2) forwards, so that the repair of the surface of the die is gradually completed;

when the trimming head mechanism (2) is in a slow gear state, the shift lever (212) is in a downward pulling position, the transmission between the main chain wheel (217) and the auxiliary chain wheel (220) is disconnected, the auxiliary chain wheel (220) is always kept in a static state, the second worm (211) and the second worm wheel (209) do not rotate, the planet carrier (205) is kept static due to the self-locking property of the worm and gear transmission, and the central wheel (207), the inner gear (202) and the three planet wheels (206) form a fixed-axis gear train; when the gear is in a slow gear state, the hand wheel (218) is rotated clockwise, the main chain wheel (217) drives the first chain wheel (219) and the first worm (210) to rotate clockwise through the first chain (216), the first worm (210) drives the first worm wheel (208) to rotate anticlockwise, the center wheel (207) rotates anticlockwise, the internal gear (202) rotates clockwise at a slow speed under the transmission action of the three planet wheels (206), the internal gear (202) pushes the moving shaft (203) to move slowly to the right through the threaded shaft (202.1), the micro-feeding of the polishing head (204.2) is realized, and the hand wheel (218) is rotated reversely to realize the micro-retreating of the polishing head (204.2); because the worm and gear transmission structure formed by the first worm (210) and the first worm gear (208) has self-locking property, when the grinding head (204.2) trims the die, the reaction force of the surface of the die on the grinding head (204.2) can not react on the hand wheel (218) through the transmission mechanism, so that the surface of the die can be smoothly trimmed by rotating the hand wheel (218);

when the trimming head mechanism (2) is in a fast-shift state, the deflector rod (212) is in a horizontal pulling position, and the main chain wheel (217) and the driven chain wheel (220) can be driven by the transmission conical wheel (214); when in a fast gear state, a hand wheel (218) is rotated clockwise, a main chain wheel (217) drives a first chain wheel (219) and a first worm (210) to rotate clockwise through a first chain (216), the first worm (210) drives a first worm wheel (208) to rotate anticlockwise, a center wheel (207) rotates anticlockwise, meanwhile, the main chain wheel (217) rotating clockwise drives a driven chain wheel (220) to rotate anticlockwise through a transmission bevel wheel (214), the driven chain wheel (220) drives a second chain wheel (221) and a second worm (211) to rotate anticlockwise through a second chain (222), the second worm (211) drives a second worm wheel (209) to rotate clockwise, a planet carrier (205) drives three planet wheels (206) to revolve, the center wheel (207), an inner gear (202) and the three planet wheels (206) form a differential gear train, and at the moment, the inner gear (202) rotates clockwise and quickly, the internal gear (202) pushes the moving shaft (203) to move rightwards quickly through the threaded shaft (202.1), so that the polishing head (204.2) can be fed quickly, and the hand wheel (218) is rotated reversely so that the polishing head (204.2) can be retreated quickly.