CN112847040A

CN112847040A - Trimming head for die surface repairing machine tool

Info

Publication number: CN112847040A
Application number: CN202110004301.1A
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: 2021-05-28

Abstract

The invention discloses a trimming head for a mould surface repairing machine tool, which comprises a shell, a worm wheel, a threaded shaft, a motor, a polishing head, a first transmission conical wheel, a moving shaft, a second transmission conical wheel, a first retaining rod, a driving wheel, a driving gear, a retaining sheet, a driven wheel, a driven gear, a second retaining rod, a transmission gear, a deflector rod, a sliding frame and a hand wheel, wherein the shell is a supporting main body; the stepless speed change mechanism consisting of the first transmission cone pulley, the second transmission cone pulley, the first retaining rod, the driving wheel, the driving gear, the retaining sheet, the driven wheel, the driven gear, the second retaining rod, the transmission gear, the spring, the pull rod, the shifting rod and the sliding frame can adjust the transmission ratio steplessly according to the feeding requirement, can feed fast during idle stroke, shortens the moving time of the polishing head, feeds slowly during the trimming of the surface of the die and improves the processing quality of the surface of the die.

Description

Trimming head for die surface repairing machine tool

Technical Field

The invention relates to the field of machining, in particular to a trimming head for a die surface 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 solve the defects of the prior art, the invention aims to provide a trimming head for a die surface repairing machine tool, which is novel in structure and convenient to use.

The technical scheme adopted by the invention is as follows: a trimming head for a mold surface repairing machine tool comprises a shell, a worm, a fourth bevel gear, a worm wheel, a threaded shaft, a motor, a clamping piece, a polishing head, a first transmission bevel gear, a second bevel gear, a moving shaft, a third bevel gear, a second transmission bevel gear, a first retaining rod, a driving wheel, a driving gear, a retaining piece, a driven wheel, a driven gear, a second retaining rod, a transmission gear, a spring, a pull rod, a deflector rod, a sliding frame, a first bevel gear and a hand wheel, wherein the shell is a supporting main body, the motor drives the polishing head to rotate through the clamping piece to realize the trimming of the surface of a mold, and the feeding and the retreating of the polishing head can be realized through rotating the hand wheel; the stepless speed change mechanism consisting of the first transmission cone pulley, the second transmission cone pulley, the first retaining rod, the driving wheel, the driving gear, the retaining sheet, the driven wheel, the driven gear, the second retaining rod, the transmission gear, the spring, the pull rod, the shifting rod and the sliding frame can adjust the transmission ratio steplessly according to the feeding requirement, can feed fast during idle stroke, shortens the moving time of the polishing head, feeds slowly during the trimming of the surface of the die and improves the processing quality of the surface of the die.

Preferably, the right end of the shell is provided with an internal spline, the side surface of the shell is provided with a transverse groove and a gear scale, a magnet strip is arranged below the transverse groove, the left end of the shell is provided with a threaded hole, two side walls of the inner part of the shell are horizontally provided with two guide rails, a hand wheel is arranged on the upper side of the shell and forms a rotation pair, a first bevel gear is coaxially and tightly connected with the lower end of the hand wheel, the right end of a threaded shaft is provided with a threaded structure, the threaded shaft is arranged in the shell and forms a rotation pair with the shell through two bearings, a worm wheel is coaxially and tightly connected with the left end of the threaded shaft, a worm is horizontally arranged in the shell and forms a rotation pair, the worm is meshed with the worm wheel to form a worm gear and worm transmission structure, a fourth bevel gear is coaxially and tightly arranged at the left end of the worm, therefore, the moving shaft and the shell form a moving pair, a threaded hole formed in the moving shaft and the right end of the threaded shaft are matched and installed to form a threaded transmission structure, and the moving shaft can be driven to move rightwards and leftwards after the threaded shaft rotates, so that feeding and retreating actions of the polishing head are realized.

Preferably, the first transmission bevel wheel is obliquely installed inside the shell and forms a rotating pair, a generatrix on the upper side of a conical surface of the first transmission bevel wheel is in a horizontal state, the second transmission bevel wheel is coaxially and fixedly connected with the left end of the first transmission bevel wheel, the second transmission bevel wheel and the first bevel wheel form gear meshing transmission, the second transmission bevel wheel is obliquely installed inside the shell and forms a rotating pair, the second transmission bevel wheel is positioned above the first transmission bevel wheel, the generatrix on the lower side of the second transmission bevel wheel is in a horizontal state, the third bevel wheel is coaxially and fixedly connected with the right end of the second transmission bevel wheel, and the third bevel wheel and the fourth bevel wheel form gear meshing transmission.

Preferably, the sliding frame is installed inside the casing, the right end of the sliding frame is positioned in the transverse slot, the sliding block structure arranged at the left end of the sliding frame and the sliding block structure arranged at the lower side of the right end of the sliding frame are respectively installed in a matching way with two guide rails at two side walls inside the casing, so that the sliding frame and the casing form a moving pair, the sliding frame is provided with a round hole and a long slot hole near the middle position, the right end of the sliding frame is provided with a gear pointer, the second retaining rod is installed in the round hole to form a rotating pair, two transmission gears are respectively and coaxially and tightly installed at two ends of the second retaining rod, the first retaining rod can slide in the long slot hole, the driving wheel is positioned at the lower side between the first retaining rod and the second retaining rod, two driving gears are respectively and coaxially and tightly installed at two ends of the driving wheel, two ends of the driving wheel are, the driven wheel is positioned on the upper side between the first retaining rod and the second retaining rod, the two driven gears are respectively and coaxially and fixedly arranged at two ends of the driven wheel, two ends of the driven wheel are rotatably connected with the first retaining rod through the two retaining pieces, and two ends of the driven wheel are also rotatably connected with the second retaining rod through the two retaining pieces, so that the driven gears are always meshed with the transmission gear.

Preferably, the left end of the pull rod and the first retaining rod form a rotating pair, a spring is arranged between the left end of the pull rod and the right side of the sliding frame, the right end of the pull rod and the upper end of the deflector rod form the rotating pair, a cross rod structure convenient to hold is arranged at the lower end of the deflector rod, and an iron block is arranged at the left end of the cross rod structure.

In the initial state, the shifting lever is in a vertical state, the magnet strip tightly adsorbs the iron block, so that the position of the shifting lever is fixed, the pull rod moves leftwards under the action of the elastic force of the spring, so that the first holding rod slides leftwards in the long slot, the driving wheel moves downwards and tightly fits with the upper side bus of the first transmission conical wheel, and the driven wheel moves upwards and tightly fits with the lower side bus of the second transmission conical wheel under the action of the thrust of the eight holding pieces.

The motor can drive the polishing head to rotate, so that the surface of the die can be trimmed.

The chucking piece can be with polishing head and motor output shaft fastening connection, can take off the polishing head and change other kinds of polishing head according to mould material and surface characteristic after unscrewing the chucking piece.

After the hand wheel is rotated clockwise, the first bevel gear drives the first transmission bevel gear to rotate clockwise, the first transmission bevel gear drives the driving wheel to rotate anticlockwise through friction force, so that the driving gear rotating anticlockwise drives the driven gear and the driven wheel to rotate anticlockwise through a gear meshing relationship between the driving gear and the driven gear, the driven wheel drives the second transmission bevel gear and the third bevel gear to rotate clockwise through a friction transmission relationship between the driven wheel and a bus at the lower side of the second transmission bevel gear, the third bevel gear drives the fourth bevel gear and the worm to rotate clockwise, the worm drives the worm gear and the threaded shaft to rotate clockwise, and under the transmission action of the threaded pair, the moving shaft moves rightwards, so that the polishing head moves rightwards to feed and the surface of the die is trimmed; the backward movement of the polishing head can be realized by rotating the hand wheel anticlockwise.

When the transmission ratio needs to be increased to slow down the feeding speed, the shifting lever is pulled upwards to be in a horizontal state, in the process, the pull rod pulls the first retaining rod to move rightwards, under the action of the tensile force of the eight retaining pieces, the driving wheel moves upwards and is separated from contact with an upper side bus of the first transmission cone pulley, the driven wheel moves downwards and is separated from contact with a lower side bus of the second transmission cone pulley, then the shifting lever moves rightwards to a proper position, the shifting lever is pulled downwards to be in a vertical state, the magnet strip adsorbs the iron block, the shifting lever and the sliding frame are fixed, at the moment, the driving wheel is tightly attached to the upper side bus of the first transmission cone pulley, the driven wheel is tightly attached to the lower side bus of the second transmission cone pulley, the transmission ratio between the first transmission cone pulley and the second transmission cone pulley is increased, and the feeding speed of the polishing head is slowed down; conversely, moving the lever to the left, the transmission ratio may be decreased to increase the feed rate of the sanding head.

The invention has the beneficial effects that:

the trimming head mechanism has a stepless speed regulating function, adopts a small transmission ratio during idle stroke, can shorten the moving time of a polishing head, adopts a large transmission ratio during trimming the surface of a die, and can improve the processing quality of the surface of the die;

the feeding speed regulation of the trimming head mechanism is realized by changing the position of a deflector rod to change the transmission ratio, the feeding speed is the fastest when the deflector rod is at the left end of the stroke, the feeding speed is the slowest when the deflector rod is at the right end of the stroke, and the transmission ratio of the feeding speed can be visually displayed on gear scales by a gear pointer;

when the feed transmission ratio is adjusted by adopting the deflector rod, the driving wheel is separated from contact with the first transmission conical wheel, the driven wheel is separated from contact with the second transmission conical wheel, and then the positions of the driving wheel and the driven wheel are moved, so that the defects that when the traditional stepless speed regulation structure is used for regulating speed, the middle speed regulation wheel is moved under the contact state of the middle speed regulation wheel and the two conical wheels, the surfaces of the conical wheels and the speed regulation wheel are scratched and slipped are overcome, the service life of the transmission mechanism is greatly prolonged, and the transmission accuracy is also improved;

the trimming head mechanism is internally provided with a worm and gear transmission structure, so that the transmission is stable, the self-locking function is realized, the reaction force of the surface of the mold to the polishing head cannot react on the hand wheel through the transmission mechanism, and the surface of the mold 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 at the minimum feed transmission ratio.

Fig. 9 is a schematic longitudinal sectional view of the dressing head mechanism at the maximum feed transmission ratio.

Fig. 10 is a partial schematic view of the shifting mechanism.

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

Fig. 12 is a schematic diagram of a transverse cross-sectional structure of the trimming head mechanism.

Fig. 13 is an exploded view of the dressing head mechanism.

Fig. 14 is a schematic view of the carriage.

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 finishing head mechanism, 201 shell, 201.1 internal spline, 201.2 transverse slot, 201.3 threaded hole, 201.4 gear scale, 201.5 magnet bar, 202 worm, 203 fourth bevel gear, 204 worm gear, 205 threaded shaft, 206 motor, 206.1 clamping piece, 206.2 polishing head, 207 first transmission bevel wheel, 208 second bevel gear, 209 moving shaft, 210 third bevel gear, 211 second transmission bevel wheel, 212 first retaining rod, 213 driving wheel, 213.1 driving gear, 214 retaining piece, 215 driven wheel, 215.1 driven gear, 216 second retaining rod, 216.1 transmission gear, 217 spring, 218 pull rod, 219 rod, 219.1 iron block, 220 sliding frame, 220.1 round hole, 220.2 long slot hole, 220.3 gear pointer 221, first bevel gear and 222 hand wheel.

Detailed Description

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

As shown in fig. 1 and 2, a machine tool for repairing a mold surface comprises 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 adopts stepless variable transmission and is fixedly arranged at the tail end of the positioning frame mechanism 1 and used for repairing the surface of a mold.

As shown in fig. 3 to 6, 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 to 14, the trimming head mechanism 2 is tightly connected with the end of the positioning frame mechanism 1, and comprises a housing 201, a worm 202, a fourth bevel gear 203, a worm gear 204, a threaded shaft 205, a motor 206, a clamping member 206.1, a trimming head 206.2, a first transmission bevel gear 207, a second bevel gear 208, a moving shaft 209, a third bevel gear 210, a second transmission bevel gear 211, a first holding rod 212, a driving wheel 213, a driving gear 213.1, a holding sheet 214, a driven wheel 215, a driven gear 215.1, a second holding rod 216, a transmission gear 216.1, a spring 217, a pull rod 218, a shift rod 219, a sliding frame 220, a first bevel gear 221 and a hand wheel 222, wherein the housing 201 is a support main body, the motor 206 drives the rotation of the trimming head 206.2 through the clamping member 206.1 to trim the surface of the mold, and the feeding and retreating of the trimming head 206.2 can be realized by rotating the hand wheel; the stepless speed change mechanism consisting of the first transmission cone pulley 207, the second transmission cone pulley 211, the first retaining rod 212, the driving wheel 213, the driving gear 213.1, the retaining sheet 214, the driven wheel 215, the driven gear 215.1, the second retaining rod 216, the transmission gear 216.1, the spring 217, the pull rod 218, the shift rod 219 and the sliding frame 220 can steplessly adjust the transmission ratio according to the feeding requirement, can feed fast in idle stroke, shortens the moving time of the polishing head, feeds slowly in the process of trimming the surface of the die and improves the processing quality of the surface of the die.

As shown in fig. 3 to 6, the base 101 is fixedly mounted on the ground through anchor bolts to provide stable support for the spacer 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 bar, the pointer sleeve 106 is coaxially mounted with the upright 104, the guide bar 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-shaped hole, the longitudinal open circular hole formed on the right side of the sliding sleeve 103 can be mounted on the outer side of the pointer sleeve 106 and form, 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 that rotation locking and height positioning of the sliding sleeve 103 are realized, 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, reading of the first scale 104.1 is facilitated, and the positioning sleeve 102 can be fixed on the upright post 104 by tightening 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 14, the right end of the housing 201 is provided with an internal spline 201.1, the side surface is provided with a transverse slot 201.2 and a gear scale 201.4, a magnet strip 201.5 is arranged below the transverse slot 201.2, the left end of the housing 201 is provided with a threaded hole 201.3, two guide rails are horizontally arranged on two side walls inside the housing, the threaded hole 201.3 and the threaded rod 116.2 form a threaded pair and are locked by a nut 115 to form a double-nut anti-loose structure, so as to realize the fastening connection of the trimming head mechanism 2 and the tail end of the positioning frame mechanism 1, a hand wheel 222 is arranged on the upper side of the housing 201 and form a rotation pair, a first bevel gear 221 is coaxially fastened and connected with the lower end of the hand wheel 222, the right end of a threaded shaft 205 is provided with a threaded structure, the threaded shaft 205 is arranged inside the housing 201 and forms a rotation pair with the housing 201 by two bearings, a worm wheel 204 is coaxially fastened and connected with the left, the fourth bevel gear 203 is coaxially and tightly mounted at the left end of the worm 202, the polishing head 206.2 is tightly connected with an output shaft of the motor 206 through a clamping piece 206.1, the motor 206 is fixedly mounted at the right end of the moving shaft 209, an external spline arranged at the left end of the moving shaft 209 is matched and mounted with an internal spline 201.1 at the right end of the shell 201, so that the moving shaft 209 and the shell 201 form a moving pair, a threaded hole arranged in the moving shaft 209 is matched and mounted with the right end of the threaded shaft 205 to form a threaded transmission structure, and the threaded shaft 205 can drive the moving shaft 209 to move rightwards and leftwards after rotating, so that feeding and retreating actions of the polishing head 206.

The first transmission bevel wheel 207 is obliquely arranged in the shell 201 and forms a rotating pair, a generatrix on the upper side of a conical surface of the first transmission bevel wheel 207 is in a horizontal state, the second bevel gear 208 is coaxially and fixedly connected with the left end of the first transmission bevel wheel 207, the second bevel gear 208 and the first bevel gear 221 form gear meshing transmission, the second transmission bevel wheel 211 is obliquely arranged in the shell 201 and forms a rotating pair, the second transmission bevel wheel 211 is positioned above the first transmission bevel wheel 207, the generatrix on the lower side of the second transmission bevel wheel is in a horizontal state, the third bevel gear 210 is coaxially and fixedly connected with the right end of the second transmission bevel wheel 211, and the third bevel gear 210 and the fourth bevel gear 203 form gear meshing transmission.

The sliding frame 220 is installed inside the casing 201, the right end of the sliding frame 220 is located in the transverse slot 201.2, the sliding block structure arranged at the left end of the sliding frame 220 and the sliding block structure arranged at the lower side of the right end of the sliding frame 220 are respectively installed in a matching way with the two guide rails at the two side walls inside the casing 201, so that the sliding frame 220 and the casing 201 form a moving pair, the sliding frame 220 is provided with a round hole 220.1 and a long slot hole 220.2 near the middle position, the right end of the sliding frame 220 is provided with a gear pointer 220.3, the second retaining rod 216 is installed in the round hole 220.1 to form a rotating pair, two transmission gears 216.1 are respectively and coaxially and tightly installed at the two ends of the second retaining rod 216, the first retaining rod 212 can slide in the long slot hole 220.2, the driving wheel 213 is located at the lower side between the first retaining rod 212 and the second retaining rod 216, two driving gears 213.1 are respectively and coaxially and tightly installed at the two ends of the driving wheel 213, the driving gear 213.1 is always meshed with the transmission gear 216.1, the driven wheel 215 is positioned on the upper side between the first holding rod 212 and the second holding rod 216, the two driven gears 215.1 are respectively and coaxially and fixedly arranged at two ends of the driven wheel 215, two ends of the driven wheel 215 are rotatably connected with the first holding rod 212 through two holding pieces 214, and two ends of the driven wheel 215 are also rotatably connected with the second holding rod 216 through two holding pieces 214, so that the driven gear 215.1 is always meshed with the transmission gear 216.1.

The left end of the pull rod 218 and the first holding rod 212 form a rotating pair, a spring 217 is arranged between the left end of the pull rod 218 and the right side of the sliding frame 220, the right end of the pull rod 218 and the upper end of a shift rod 219 form a rotating pair, the lower end of the shift rod 219 is provided with a cross rod structure convenient for holding, and the left end of the cross rod structure is provided with an iron block 219.1.

In an initial state, the shift lever 219 is in a vertical state, the magnet bar 201.5 tightly adheres to the iron block 219.1, so that the position of the shift lever 219 is fixed, the pull rod 218 moves leftward under the elastic force of the spring 217, so that the first holding rod 212 slides leftward in the elongated slot 220.2, the driving wheel 213 moves downward and tightly adheres to an upper bus of the first transmission bevel wheel 207, and the driven wheel 215 moves upward and tightly adheres to a lower bus of the second transmission bevel wheel 211 under the thrust of the eight holding pieces 214.

The motor 206 can drive the polishing head 206.2 to rotate, thereby realizing the surface modification of the die.

The retainer 206.1 can tightly connect the sanding head 206.2 with the output shaft of the motor 206, and the sanding head 206.2 can be removed after loosening the retainer 206.1 and replaced with other types of sanding heads according to the material and surface characteristics of the mold.

When the surface of the mold is repaired, 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 206.2 is aligned to the position of the surface of the mold to be corrected, and then the hand wheel 222 is rotated to feed the polishing head 206.2 forward, so that the repair of the surface of the mold is gradually completed.

After the hand wheel 222 is rotated clockwise, the first bevel gear 221 drives the first transmission bevel wheel 207 to rotate clockwise, the first transmission bevel wheel 207 drives the driving wheel 213 to rotate counterclockwise through friction force, so that the driving gear 213.1 rotating counterclockwise drives the driven gear 215.1 and the driven gear 215.1 to rotate counterclockwise through a gear meshing relationship between the driving gear 216.1 and the driven gear 215.1, the driven gear 215 drives the second transmission bevel wheel 211 and the third bevel gear 210 to rotate clockwise through a friction transmission relationship with a bus at the lower side of the second transmission bevel wheel 211, the third bevel gear 210 drives the fourth bevel gear 203 and the worm 202 to rotate clockwise, the worm 202 drives the worm wheel 204 and the threaded shaft 205 to rotate clockwise, the moving shaft 209 moves rightwards under the transmission action of a thread pair, so that the polishing head 206.2 moves rightwards and feeds to trim the surface of the die; the backward movement of the sanding head 206.2 is achieved by turning the hand wheel 222 counterclockwise.

When the transmission ratio needs to be increased to slow down the feeding speed, the shift lever 219 is first pulled up to the horizontal state, in the process, the pull rod 218 pulls the first holding rod 212 to move to the right, under the pulling force of the eight holding pieces 214, the driving wheel 213 moves upwards and is out of contact with the upper generatrix of the first transmission cone pulley 207, the driven wheel 215 moves downwards and is out of contact with the lower generatrix of the second transmission cone pulley 211, then after moving the shift rod 219 to the right to a proper position, the shift lever 219 is pulled down to a vertical state, so that the magnet bar 201.5 adsorbs the iron block 219.1, thereby fixing the position of the shift rod 219 and the sliding bracket 220, in which the driving pulley 213 is closely attached to the upper generatrix of the first driving pulley 207, the driven pulley 215 is closely attached to the lower generatrix of the second driving pulley 211, thereby increasing the transmission ratio between the first transmission cone pulley 207 and the second transmission cone pulley 211 and slowing down the feeding speed of the sanding head 206.2; conversely, moving the position of the dial 219 to the left, the transmission ratio may be decreased to increase the feed speed of the sanding head 206.2.

The feed gear ratio of the trimmer head mechanism 2 can be indicated on the gear scale 201.4 by the gear indicator 220.3.

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. A trimming head for a mold surface repairing machine tool, hereinafter referred to as a trimming head mechanism (2), comprises a shell (201), a worm (202), a fourth bevel gear (203), a worm wheel (204), a threaded shaft (205), a motor (206), a clamping piece (206.1), a polishing head (206.2), a first transmission bevel wheel (207), a second bevel gear (208), a moving shaft (209), a third bevel gear (210), a second transmission bevel wheel (211), a first holding rod (212), a driving wheel (213), a driving gear (213.1), a holding piece (214), a driven wheel (215), a driven gear (215.1), a second holding rod (216), a transmission gear (216.1), a spring (217), a pull rod (218), a shift rod (219), a sliding frame (220), a first bevel gear (221) and a hand wheel (222), and is characterized in that: the shell (201) is a supporting main body, the motor (206) drives the polishing head (206.2) to rotate through the clamping piece (206.1) to finish the surface of the die, and the polishing head (206.2) can be fed and retreated by rotating the hand wheel (222); the stepless speed change mechanism consisting of the first transmission cone pulley (207), the second transmission cone pulley (211), the first retaining rod (212), the driving wheel (213), the driving gear (213.1), the retaining sheet (214), the driven wheel (215), the driven gear (215.1), the second retaining rod (216), the transmission gear (216.1), the spring (217), the pull rod (218), the shift rod (219) and the sliding frame (220) can steplessly adjust the transmission ratio according to the feeding requirement, can quickly feed during idle stroke, shortens the moving time of a grinding head, slowly feeds during the surface finishing of the die, and improves the surface processing quality of the die.

2. A dressing head for a mold surface 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 side surface of the shell is provided with a transverse slot (201.2) and a gear scale (201.4), a magnet strip (201.5) is arranged below the transverse slot (201.2), the left end of the shell (201) is provided with a threaded hole (201.3), two guide rails are horizontally arranged on two side walls of the shell, a hand wheel (222) is arranged on the upper side of the shell (201) and forms a rotating pair, a first bevel gear (221) is coaxially and fixedly connected with the lower end of the hand wheel (222), the right end of a threaded shaft (205) is provided with a threaded structure, the threaded shaft (205) is arranged in the shell (201) and forms a rotating pair with the shell (201) through two bearings, a worm wheel (204) is coaxially and fixedly connected with the left end of the threaded shaft (205), a worm (202) is horizontally arranged in the shell (201) and forms a rotating pair, the worm (202) is meshed with the worm wheel (204), the polishing head (206.2) is fixedly connected with an output shaft of the motor (206) through a clamping piece (206.1), the motor (206) is fixedly installed at the right end of the moving shaft (209), an external spline arranged at the left end of the moving shaft (209) is matched and installed with an internal spline (201.1) at the right end of the shell (201), so that the moving shaft (209) and the shell (201) form a moving pair, a threaded hole formed in the moving shaft (209) is matched and installed with the right end of the threaded shaft (205) to form a threaded transmission structure, and the threaded shaft (205) can drive the moving shaft (209) to move rightwards and leftwards after rotating, so that feeding and retreating actions of the polishing head (206.2) are realized.

3. A dressing head for a mold surface repair machine according to claim 1, characterized in that: the first transmission bevel wheel (207) is obliquely arranged in the shell (201) and forms a rotating pair, a generatrix on the upper side of a conical surface of the first transmission bevel wheel (207) is in a horizontal state, the second transmission bevel wheel (208) is coaxially and fixedly connected with the left end of the first transmission bevel wheel (207), the second transmission bevel wheel (208) and the first bevel wheel (221) form gear meshing transmission, the second transmission bevel wheel (211) is obliquely arranged in the shell (201) and forms a rotating pair, the second transmission bevel wheel (211) is positioned above the first transmission bevel wheel (207), the generatrix on the lower side of the second transmission bevel wheel is in a horizontal state, the third bevel wheel (210) is coaxially and fixedly connected with the right end of the second transmission bevel wheel (211), and the third bevel wheel (210) and the fourth bevel wheel (203) form gear meshing transmission;

the sliding frame (220) is arranged inside the shell (201), the right end of the sliding frame is positioned in the transverse slot (201.2), a sliding block structure arranged at the left end of the sliding frame (220) and a sliding block structure arranged at the lower side of the right end of the sliding frame (220) are respectively matched and arranged with two guide rails on two side walls inside the shell (201), so that the sliding frame (220) and the shell (201) form a moving pair, a round hole (220.1) and a long slot hole (220.2) are arranged at the position, close to the middle, of the sliding frame (220), a gear pointer (220.3) is arranged at the right end of the sliding frame, a second retaining rod (216) is arranged in the round hole (220.1) to form a rotating pair, two transmission gears (216.1) are respectively and coaxially and fixedly arranged at two ends of the second retaining rod (216), a first retaining rod (212) can slide in the long slot hole (220.2), a driving wheel (213) is positioned at the lower side between the first retaining rod (212), two ends of a driving wheel (213) are rotatably connected with a first holding rod (212) through two holding pieces (214), two ends of the driving wheel (213) are further rotatably connected with a second holding rod (216) through two holding pieces (214), so that the driving gear (213.1) is always meshed with a transmission gear (216.1), a driven wheel (215) is positioned on the upper side between the first holding rod (212) and the second holding rod (216), two driven gears (215.1) are coaxially and fixedly arranged at two ends of the driven wheel (215) respectively, two ends of the driven wheel (215) are rotatably connected with the first holding rod (212) through two holding pieces (214), and two ends of the driven wheel (215) are also rotatably connected with the second holding rod (216) through two holding pieces (214), so that the driven gear (215.1) is always meshed with the transmission gear (216.1);

the left end of the pull rod (218) and the first holding rod (212) form a rotating pair, a spring (217) is arranged between the left end of the pull rod (218) and the right side of the sliding frame (220), the right end of the pull rod (218) and the upper end of the shift rod (219) form a rotating pair, the lower end of the shift rod (219) is provided with a cross rod structure convenient for holding, and the left end of the cross rod structure is provided with an iron block (219.1);

in an initial state, the shifting rod (219) is in a vertical state, the magnet strip (201.5) tightly adsorbs the iron block (219.1), so that the position of the shifting rod (219) is fixed, the pull rod (218) moves leftwards under the action of the elastic force of the spring (217), so that the first retaining rod (212) slides leftwards in the long slotted hole (220.2), under the action of the thrust of the eight retaining pieces (214), the driving wheel (213) moves downwards and tightly adheres to an upper side bus of the first transmission cone pulley (207), and the driven wheel (215) moves upwards and tightly adheres to a lower side bus of the second transmission cone pulley (211).

4. A dressing head for a mold surface repair machine according to claim 1, characterized in that: the motor (206) can drive the polishing head (206.2) to rotate, so that the surface of the die can be trimmed;

the clamping piece (206.1) can tightly connect the polishing head (206.2) with the output shaft of the motor (206), and the polishing head (206.2) 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 (206.1) is unscrewed;

after a hand wheel (222) is rotated clockwise, a first bevel gear (221) drives a first transmission bevel wheel (207) to rotate clockwise, the first transmission bevel wheel (207) drives a driving wheel (213) to rotate anticlockwise through friction force, so that the driving gear (213.1) rotating anticlockwise drives a driven gear (215.1) and a driven gear (215.1) to rotate anticlockwise through a gear meshing relationship between the driving gear (216.1) and the driven gear (215.1), the driven gear (215) drives a second transmission bevel wheel (211) and a third bevel gear (210) to rotate clockwise through a friction transmission relationship with a bus at the lower side of the second transmission bevel wheel (211), the third bevel gear (210) drives a fourth bevel gear (203) and a worm (202) to rotate clockwise, the worm (202) drives a worm gear (204) and a threaded shaft (205) to rotate clockwise, and a moving shaft (209) moves rightwards under the transmission effect of the threaded pair, thereby realizing the feed of the polishing head (206.2) moving to the right and finishing the surface of the die; the backward movement of the polishing head (206.2) can be realized by rotating the hand wheel (222) anticlockwise;

when the transmission ratio needs to be increased to slow down the feeding speed, the shifting lever (219) is firstly pulled upwards to be in a horizontal state, in the process, the pull rod (218) pulls the first retaining rod (212) to move rightwards, under the action of the pulling force of the eight retaining pieces (214), the driving wheel (213) moves upwards and is separated from contact with an upper side bus of the first transmission cone pulley (207), the driven wheel (215) moves downwards and is separated from contact with a lower side bus of the second transmission cone pulley (211), then the shifting lever (219) moves rightwards to a proper position, the shifting lever (219) is pulled downwards to be in a vertical state, the magnet strip (201.5) adsorbs the iron block (219.1), so that the positions of the shifting lever (219) and the sliding frame (220) are fixed, at the moment, the driving wheel (213) is tightly attached to the upper side bus of the first transmission cone pulley (207), the driven wheel (215) is tightly attached to the lower side bus of the second transmission cone pulley (211), thereby increasing the transmission ratio between the first transmission cone pulley (207) and the second transmission cone pulley (211) and reducing the feeding speed of the polishing head (206.2); conversely, by moving the position of the shift lever (219) to the left, the transmission ratio can be reduced to increase the feed speed of the sanding head (206.2);

the feed transmission ratio of the trimmer head mechanism (2) can be indicated on the gear scale (201.4) by the gear pointer (220.3).