CN110773638B

CN110773638B - High-precision stamping die

Info

Publication number: CN110773638B
Application number: CN201911164335.6A
Authority: CN
Inventors: 付才
Original assignee: Jiangsu Xinhuaming Machine Manufacturing Co ltd
Current assignee: Jiangsu Xinhuaming Machine Manufacturing Co.,Ltd.
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2021-01-05
Anticipated expiration: 2039-11-25
Also published as: CN110773638A

Abstract

The invention belongs to the technical field of stamping die preparation, and particularly relates to a high-precision stamping die which comprises an upper template and a lower template; a first annular groove is formed in one side, close to the upper template, of the lower template; a second annular groove is formed in one side, away from the upper template, of the first annular groove; a supporting plate is elastically connected in the first annular groove through a spring; a squeezing bag is fixedly connected in the second annular groove; the lower template is positioned on the outer side of the first annular groove and is provided with first sliding chutes which are uniformly distributed; fixed sliding blocks are connected in the first sliding grooves in a sliding mode; the upper template is provided with a first groove; a fixing column is arranged in the first groove; the fixing column is hollow and the inner cavity of the fixing column is provided with a punch; third grooves which are uniformly distributed are formed in the inner wall of the fixing column; the third grooves are internally and slidably connected with fixed blocks; the invention can achieve the purpose of fast replacing the punch by simplifying the fixing mode of the punch, thereby ensuring the precision of the punch and finally ensuring the precision of the product to reach the standard.

Description

High-precision stamping die

Technical Field

The invention belongs to the technical field of stamping die preparation, and particularly relates to a high-precision stamping die.

Background

A punching die is a special process device for processing materials (metal or nonmetal) into parts (or semi-finished products) in cold punching processing, called as a cold punching die (commonly called as a cold punching die), punching is a pressure processing method for obtaining required parts by applying pressure to the materials by using a die arranged on a press machine at room temperature to separate or plastically deform the materials, in the prior art, when a punching die is designed, the male die is usually fixed in two ways of mechanical fixing and adhesion, the common mechanical fixing methods comprise a transverse pin fixing method, a screw fastening method, a male die rivet turning method and a left and right semi-fixing plate fixing method, the adhesion method usually uses epoxy resin and low-melting-point alloy for adhesion, but the fixing methods have problems, such as the screw fastening method, the screw fastening force is limited, the male die is easy to pull out, and the verticality of the male die in the rivet turning method is influenced, the adhesion method needs to restore the adhesion layer and the gap needs to be readjusted, and the above methods all have the problems of troublesome and complicated disassembly, and the male die cannot be replaced rapidly and frequently, so that the male die seriously influences the control of the product precision in the long-time working process.

A punching male die convenient to disassemble and issued by Chinese patent is disclosed in patent No. 201510890869, and the scheme comprises a punching end and a fixed end fixed with a male die fixed plate; the edge of the lower end part of the stamping end is provided with a cutting edge; the tail end of the fixed end is provided with an anti-rotation limiting block; the section of the anti-rotation limiting block is hexagonal; the minimum diameter of the anti-rotation limiting block is larger than that of the fixed end; the upper end part of the anti-rotation limiting block is provided with a straight groove; the cross section of the straight groove is in an inverted T shape; the anti-rotation punch comprises a fixed end, a rotating limiting block and a rubber ring, wherein the fixed end is provided with a groove close to the rotating limiting block, the rubber ring is arranged in the groove, the anti-rotation punch is simple in structure, stable and convenient to disassemble and assemble, when the punch is disassembled, the punch end does not need to be knocked, the punch can be conveniently pulled out of a punch fixing plate only through a straight groove at the tail end by using a pulling device, but the punch can be disassembled only by disassembling the fixed end of the punch together when the punch is replaced, and the disassembling work is still troublesome.

Disclosure of Invention

The invention provides a high-precision stamping die, which aims to make up for the defects of the prior art and solve the problems that the mounting mode of a male die in the prior stamping die is complex, the male die cannot be replaced timely and frequently after being worn so as to ensure the precision of a product, and the precision of a stamping material is insufficient due to the fact that the stamping material is easy to vibrate and displace in the stamping process.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a high-precision stamping die which comprises an upper template and a lower template; a first annular groove is formed in one side, close to the upper template, of the lower template; a second annular groove is formed in one side, away from the upper template, of the first annular groove; a supporting plate is elastically connected in the first annular groove through a spring; the supporting plate is in a T-shaped design; a squeezing bag is fixedly connected in the second annular groove; the lower template is positioned on the outer side of the first annular groove and is provided with first sliding chutes which are uniformly distributed; fixed sliding blocks are connected in the first sliding grooves in a sliding mode; an inflatable bag is fixedly connected between the fixed sliding block and one side of the first sliding groove, which is far away from the first annular groove; the inflatable bag is communicated with the extrusion bag through a conduit; the supporting plate is fixedly connected with a positioning pin; one side of the upper template, which is close to the lower template, is fixedly connected with a guide rod; a second sliding groove is formed in the guide rod; the second sliding chute is in a T-shaped design; a T-shaped sliding rod is elastically connected in the second sliding groove through a spring; the surface of one side of the sliding rod, which is close to the lower template, is fixedly connected with an extrusion block; the extrusion block is made of rubber materials, and the lower surface of the extrusion block is arranged roughly;

when the device works, the upper template and the lower template are respectively fixed on a punching machine and a machine table through bolts, the punching material aligning positioning needle is placed on the supporting plate, the punching machine is started, the upper template is driven by the punching machine to be pressed down at a constant speed, in the pressing down process, the extrusion block firstly contacts the punching material and extrudes the punching material downwards, the punching material is driven by the force of downward extrusion to move the supporting plate downwards, in the moving down process of the supporting plate, the extrusion bag fixedly connected in the second annular groove is extruded, the gas in the inner cavity is input into the inflation bag through the conduit, the air pressure of the inflation bag in the first sliding groove is increased, the fixed slide block is extruded towards the outside of the first sliding groove, so that the fixed slide block uniformly arranged in the first sliding groove clamps and fixes the punching material from the side surface, meanwhile, the slide rod gradually moves towards the inside of the second sliding groove along with the continuous pressing down of the upper template and continuously applies downward, after punching is finished, the upper die plate moves upwards under the driving of the punching machine, the extrusion block fixedly connected with the lower surface of the sliding rod still extrudes punching materials at the moment, the extrusion block is separated from the punching materials after the upper die plate moves upwards to a certain distance, when the stress of the supporting plate disappears, the supporting plate moves upwards to reset under the action of a spring in the first annular groove, when the supporting plate resets, gas in the inflatable bag flows back to the extrusion bag to drive the fixed sliding block to reset, the positioning needle, the fixed sliding block and the extrusion block are jointly arranged, the punching materials to be processed are fixed in multiple directions in the horizontal and vertical directions, the punching materials are prevented from vibrating and displacing in the punching process, errors are generated in the processed punching materials, the sizes, the flatness of cut surfaces and other precision of the processed punching materials do not reach the standard, the precision of products cannot be guaranteed, and meanwhile, the supporting plate and the annular groove are arranged to enable the processing process to occur in a concave position on the surface of the lower, can prevent to take place the accident in the course of working effectively, avoid piece quadriversal sputtering, cause certain potential safety hazard, and the establishment of extrusion piece rubber material can avoid extrusion piece to lead to the fact the damage to dashing the material surface effectively when can making extrusion piece exert pressure to dashing the material, finally influences the performance of product.

Preferably, a third sliding chute is formed in the side surface of the sliding rod, which is far away from the lower template; the third chute is designed in an annular manner; the third sliding chute is internally connected with a ball in a sliding way; the inner wall of the third sliding chute is elastically connected with an elastic plate;

the during operation, in the quick repetitive operation of punching machine continuity, use the ball to rotate with the second spout and be connected, can reduce the frictional force with second spout lateral wall effectively, avoid among the quick working process too big slide bar fracture that leads to of frictional force in the twinkling of an eye, unfavorable changes such as deformation, finally cause extra maintenance cost and unnecessary potential safety hazard, the maintenance must consume a large amount of time simultaneously, will produce very big influence to production efficiency, and the settlement of elastic plate, can leave partial buffering room for the ball in the horizontal direction, can alleviate the frictional force that the ball produced because of the quick slip effectively, can reduce the probability that the ball locked and lead to the device to receive the damage effectively, make the performance of device more superior.

Preferably, a first groove is formed in the surface of one side, close to the lower template, of the upper template; a fixing column is arranged in the first groove; a second groove is formed in one side, located on the first groove, of the upper template; the second groove is in an inverted L-shaped design; the second groove is communicated with the first groove; a guide groove is formed in the position, opposite to the second groove, of the fixing column; one side, close to the fixed column, of the second groove is connected with a positioning bead in a sliding mode; an extrusion rod is connected in the second groove through threads; the fixing column is hollow and the inner cavity of the fixing column is provided with a punch; third grooves which are uniformly distributed are formed in the inner wall of the fixing column; the third grooves are internally and slidably connected with fixed blocks; the fixing block is designed into a cambered surface at one side close to the punch and a slope at one side far away from the punch; a fourth groove is formed in the fixed column below the third groove, and the fourth groove and the third groove are in a conducting design; a rotating ring is connected in the fourth groove in a sliding manner; the surface of one side, close to the third groove, of the rotating ring is fixedly connected with a rotating rod, and the rotating rod extends into the third groove; the fourth groove is arranged at the position, close to the side wall of the lower template, of the fixing column and is provided with an opening; the fixing column is positioned at the opening of the fourth groove and is in threaded connection with a fastening ring; the fastening ring is fixedly connected with the rotating ring;

during operation, insert the drift in the fixed column inner chamber, the tighrening ring rotates and drives the rotating ring to rotate, thereby make the dwang rotate in the third recess, the pivoted dwang extrudees the fixed block, thereby make the fixed block move outside the third recess, make the drift that is in the fixed column inner chamber receive the extrusion and thus fix, insert the fixed column again in the first recess this moment, twist the extrusion stem, make the extrusion stem rise thereby make the locating ball in the second recess receive the extrusion and thus get into the guide slot offered on the fixed column, make the fixed column fix in the first recess, after the mould carries out a large amount of repetitive operation, because of the reason that the drift extrudees each other with the punching material a large amount, the drift produces wearing and tearing, the precision can produce and descend, need maintain or change the drift this moment, when needing to change the drift, only need to reverse rotate the tighrening ring, thereby drive the dwang and alleviate the pressure to the fixed block, can directly take off the drift this moment and change or maintain, when fixing device wholly breaks down or periodic maintenance, can rotate the extrusion stem in the opposite direction, make the location pearl not receive the extrusion, can take off the fixed column is whole this moment, the damaged part of selective dismantlement can be carried out in fixed column and the detachable installation of drift is maintained or is changed, but not whole dismantlement, not only can be more convenient and fast when emergency maintain the device, reduce the time that dismantlement and loading need consume, accelerate the efficiency of maintenance, but also the working strength that alternative dismantlement has alleviateed maintainer simultaneously, it is more swift that the work of making change goes on, the simplicity and convenience that the structure set up makes the maintenance degree of difficulty reduce simultaneously, make device cost of maintenance reduce.

Preferably, the surface of one side, close to the punch, of the fixed block is fixedly connected with an air cushion layer; the air cushion layer is hollow and has a rough surface; a rubber bag is fixedly connected in the third groove in the rotating direction of the rotating rod; the rubber bag is designed to be hollow; the rubber bag is communicated with the air cushion layer through a conduit; the during operation, the dwang extrudees the rubber bag when third recess internal rotation to make the rubber bag in gaseous through pipe entering air cushion layer inside, make the air cushion layer take place the inflation, increase the area of contact of air cushion layer surface and drift, thereby make the fastening effect of device more superior, can promote the drift effectively at the firmness of fixed column inner chamber, avoid the drift atress too big phenomenon such as drops that produces when rising, cause device trouble and certain potential safety hazard.

Preferably, a sheath is arranged in the inner cavity of the fixing column; the sheath is internally designed in a stepped hollow manner; the inner cavity of the sheath is connected with a punch in a sliding manner; a buffer column is arranged between the punch and one end of the inner cavity of the sheath, which is far away from the lower template; the buffer column is made of rubber materials; during operation, insert the drift in the sheath inner chamber, pack into the buffering post again, install the sheath in the fixed column inner chamber at last, the fixed block is fixed the sheath under the extrusion of dwang, in-process that punching press work goes on, the existence of sheath can further play the guard action to the drift, prevent that the drift from receiving the too big emergence fracture of stress in the twinkling of an eye, not only cause the damage of device, still cause the potential safety hazard easily, the drift is at the punching press in-process simultaneously, the existence of buffering post is alleviated the punching machine to drift ground stress to a certain extent, avoid the drift to break, and when stress can't clear up completely, the existence of sheath makes the drift break off the position comparatively be close to the lower extreme, can grind the drift again this moment, make the drift reprocess back and still can continue to use, the required expense of maintenance has been saved effectively, play saving cost of maintenance.

Preferably, a female die matched with the punch for use is installed on one side, close to the upper die plate, of the lower die plate; the lower template is positioned below the female die and is provided with a collecting tank; the collecting tank is designed in a circular truncated cone shape; during operation, punching part is punched under the cooperation of drift and die, and after the punching press was accomplished, waste material, residue were pushed down the collecting vat by the drift in, and collecting vat round platform shape design can prevent effectively that the waste material from blockking up the collecting vat, and simultaneously, the existence of collecting vat can avoid effectively working on the assembly line, can avoid residue and waste material to receive the influence towards a precision in punching process effectively at continuous punching press in-process, makes the finished product precision descend to reduce the performance of product.

The invention has the following beneficial effects:

1. according to the high-precision stamping die, the positioning pin, the fixed sliding block and the extrusion block are arranged to fix a stamping material in multiple directions in space, so that the stamping material can be effectively prevented from being displaced due to vibration of a machine and acting force between a stamping head and the stamping material in the stamping process, the product error is increased, and meanwhile, due to the arrangement of the supporting plate and the annular groove, the stamping process is completed in the lower die plate, and safety accidents can be effectively caused.

2. According to the high-precision stamping die, the punch and the fixing column are divided into a plurality of parts by arranging the fixing column, the sheath, the rotating rod and the fixing block, and can be selectively disassembled, so that the punch or the device can be quickly maintained or replaced when in failure, the workload of maintenance personnel is effectively reduced, the speed of maintenance work is increased, the work efficiency is increased, the punch replacement frequency is increased due to the convenience of disassembly, and the precision reduction frequency caused by punch abrasion is effectively reduced.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an internal construction view of a fixing post;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 5 is an enlarged view of a portion of FIG. 2 at B;

in the figure: the die comprises an upper die plate 1, a lower die plate 2, a first annular groove 3, a second annular groove 31, a supporting plate 32, an extrusion bag 33, a first sliding groove 34, a fixed sliding block 35, an inflation bag 36, a positioning needle 37, a guide rod 4, a second sliding groove 41, a sliding rod 42, an extrusion block 43, a third sliding groove 44, a ball 45, an elastic plate 46, a first groove 5, a fixed column 51, a second groove 52, a positioning ball 53, an extrusion rod 54, a guide groove 55, a punch 6, a third groove 7, a fixed block 71, a fourth groove 72, a rotating ring 73, a rotating rod 74, a fastening ring 75, an air cushion layer 76, a rubber bag 77, a sheath 8, a buffer column 81, a female die 82 and a collecting groove 9.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 5, the high-precision stamping die of the present invention includes an upper template 1 and a lower template 2; a first annular groove 3 is formed in one side, close to the upper template 1, of the lower template 2; a second annular groove 31 is formed in one side, far away from the upper template 1, of the first annular groove 3; a support plate 32 is elastically connected in the first annular groove 3 through a spring; the support plate 32 is of a "T" shaped design; a squeezing bag 33 is fixedly connected in the second annular groove 31; the lower template 2 is provided with first sliding grooves 34 which are uniformly distributed and positioned outside the first annular groove 3; the first sliding grooves 34 are internally and respectively connected with a fixed sliding block 35 in a sliding manner; an inflatable bag 36 is fixedly connected between the fixed slide block 35 and one side of the first chute 34 far away from the first annular groove 3; the inflatable bag 36 and the extrusion bag 33 are communicated through a conduit; the supporting plate 32 is fixedly connected with a positioning pin 37; one side of the upper template 1, which is close to the lower template 2, is fixedly connected with a guide rod 4; a second sliding groove 41 is formed in the guide rod 4; the second sliding groove 41 is in a T-shaped design; a T-shaped sliding rod 42 is elastically connected in the second sliding groove 41 through a spring; the surface of one side of the sliding rod 42, which is close to the lower template 2, is fixedly connected with an extrusion block 43; the extrusion block 43 is made of rubber material and the lower surface is rough;

when the device works, the upper die plate 1 and the lower die plate 2 are respectively fixed on a punching machine and a machine table through bolts, an upper positioning hole of a punching material is aligned with a positioning needle 37 and is placed on the supporting plate 32, the punching machine is started, the upper die plate 1 is driven by the punching machine to be pressed downwards at a constant speed, in the pressing process, the extrusion block 43 firstly contacts the punching material and downwards extrudes the punching material, the punching material is driven by the downwards extrusion force to drive the supporting plate 32 to downwards move, in the downwards moving process of the supporting plate 32, the extrusion bag 33 fixedly connected in the second annular groove 31 is extruded, gas in an inner cavity is input into the inflation bag 36 through a conduit, the air pressure of the inflation bag 36 in the first sliding groove 34 is increased, the fixed slide block 35 is extruded to the outside of the first sliding groove 34, and as the size of the punching material is smaller than that of the supporting plate 32 and larger than the relative distance of the two positioning, meanwhile, along with the continuous downward pressing of the upper template 1, the sliding rod 42 gradually moves towards the inside of the second chute 41 and continuously applies downward pressure to the punching material, after the punching is finished, the upper template 1 moves upwards under the driving of the punching machine, at the moment, the extrusion block 43 fixedly connected with the lower surface of the sliding rod 42 still extrudes the punching material, along with the upward movement of the upper template 1 to a certain distance, the extrusion block 43 is separated from the punching material, after the stress of the support plate 32 disappears, the support plate 32 moves upwards under the action of the spring in the first annular groove 3 to reset, when the support plate 32 resets, the gas in the gas-filled bag 36 flows back to the extrusion bag 33, so as to drive the fixed slide block to reset, the positioning needle 37, the fixed slide block 35 and the extrusion block 43 are arranged together, the punching material to be processed is fixed in multiple directions in the horizontal and vertical directions, and the punching material is prevented from vibrating and generating displacement in the punching, thereby lead to the towards material after the processing to produce the error, the towards material size after making the processing, precision such as section roughness is not up to standard, can't ensure the precision of product, the establishment of backup pad 32 and ring channel makes the course of working take place in the depressed part on 2 surfaces of lower die plate simultaneously, can prevent to take place the accident in the course of working effectively, avoid piece quadriversal sputtering, cause certain potential safety hazard, and the establishment of extrusion piece 43 rubber material, can make extrusion piece 43 can avoid extrusion piece 43 to cause the damage to towards the material surface effectively when exerting pressure to towards the material, finally influence the performance of product.

As an embodiment of the invention, a third sliding chute 44 is formed in a side surface of the sliding rod 42 away from the lower template 2; the third runner 44 is of annular design; a ball 45 is connected in the third sliding chute 44 in a sliding manner; an elastic plate 46 is elastically connected to the inner wall of the third sliding chute 44;

the during operation, in the quick repetitive operation of punching machine continuity, use ball 45 to rotate with second spout 41 and be connected, can reduce the frictional force with second spout 41 lateral wall effectively, avoid among the quick working process too big slide bar 42 fracture that leads to of frictional force in the twinkling of an eye, unfavorable changes such as deformation, finally cause extra maintenance cost and unnecessary potential safety hazard, the maintenance must consume a large amount of time simultaneously, will produce very big influence to production efficiency, and the settlement of elastic plate 46, can leave partial buffer room for ball 45 in the horizontal direction, can alleviate ball 45 because of the frictional force that the quick slip produced effectively, can reduce ball 45 effectively and lock the probability that leads to the device to receive the damage, make the performance of device more superior.

As an embodiment of the invention, a first groove 5 is formed on the surface of one side of the upper template 1, which is close to the lower template 2; a fixed column 51 is arranged in the first groove 5; a second groove 52 is formed in one side, located on the first groove 5, of the upper template 1; the second groove 52 is designed in an inverted L shape; the second groove 52 is communicated with the first groove 5; a guide groove 55 is formed in the position, opposite to the second groove 52, of the fixed column 51; one side of the second groove 52 close to the fixed column 51 is slidably connected with a positioning bead 53; an extrusion rod 54 is connected in the second groove 52 through threads; the fixing column 51 is hollow and the inner cavity of the fixing column is provided with a punch 6; the inner wall of the fixed column 51 is provided with third grooves 7 which are uniformly distributed; the third grooves 7 are internally and slidably connected with fixing blocks 71; the fixing block 71 is designed into a cambered surface at one side close to the punch 6 and a slope at one side far away from the punch 6; a fourth groove 72 is formed in the fixed column 51 below the third groove 7, and the fourth groove 72 is communicated with the third groove 7; a rotating ring 73 is connected in the fourth groove 72 in a sliding manner; the surface of one side of the rotating ring 73, which is close to the third groove 7, is fixedly connected with a rotating rod 74, and the rotating rod 74 extends into the third groove 7; the fourth groove 72 is arranged at the position, close to the side wall of the lower template 2, of the fixing column 51 and is open; a fastening ring 75 is in threaded connection with the fixed column 51 at the opening of the fourth groove 72; the fastening ring 75 is fixedly connected with the rotating ring 73;

when the die works, the punch 6 is inserted into the inner cavity of the fixed column 51, the fastening ring 75 is rotated, the fastening ring 75 rotates to drive the rotating ring 73 to rotate, so that the rotating rod 74 rotates in the third groove 7, the rotating rod 74 extrudes the fixed block 71, so that the fixed block 71 moves towards the outside of the third groove 7, the punch 6 in the inner cavity of the fixed column 51 is extruded and fixed, at the moment, the fixed column 51 is inserted into the first groove 5, the extruding rod 54 is screwed, so that the extruding rod 54 rises, positioning beads in the second groove 52 are extruded and enter the guide groove 55 formed in the fixed column 51, the fixed column 51 is fixed in the first groove 5, after a large number of repeated operations of dies are carried out, the punch 6 is abraded due to the fact that the punch 6 and punching materials are extruded mutually, the precision is reduced, and at the moment, the punch 6 needs to be maintained or replaced, when the punch 6 needs to be replaced, only the fastening ring 75 needs to rotate reversely, so that the rotating rod 74 is driven to relieve the pressure on the fixed block 71, the punch 6 can be directly taken down for replacement or maintenance, when the whole fixing device breaks down or is maintained regularly, the extruding rod 54 can rotate reversely, so that the positioning beads 53 are not extruded, the fixed column 51 can be taken down completely, the fixed column 51 and the punch 6 can be detachably mounted to selectively detach damaged parts for maintenance or replacement instead of being integrally detached, the device can be maintained more conveniently and rapidly in emergency, the time consumed by detachment and loading is reduced, the maintenance efficiency is accelerated, meanwhile, the working strength of maintenance personnel is relieved by selective detachment, the replacement work is more rapid, and the maintenance difficulty is reduced due to the simplicity of structural arrangement, the maintenance cost of the device is reduced.

As an embodiment of the invention, an air cushion layer 76 is fixedly connected to one side surface of the fixed block 71 close to the punch 6; the air cushion layer 76 is hollow and has a rough surface design; a rubber bag 77 is fixedly connected in the third groove 7 in the rotating direction of the rotating rod 74; the rubber bladder 77 is of hollow design; the rubber bag 77 is communicated with the air cushion layer 76 through a conduit; during operation, dwang 74 extrudes rubber bag 77 when third recess 7 internal rotation to make the inside gas of rubber bag 77 pass through inside the pipe gets into air cushion layer 76, make air cushion layer 76 take place the inflation, increase air cushion layer 76 surface and drift 6's area of contact, thereby make the fastening effect of device more superior, can promote drift 6's firmness at fixed column 51 inner chamber effectively, avoid drift 6 phenomenon such as the too big production of atress drops when rising, cause device trouble and certain potential safety hazard.

As an embodiment of the invention, the fixing column 51 is internally provided with a sheath 8; the sheath 8 is internally designed in a stepped hollow manner; the inner cavity of the sheath 8 is connected with a punch 6 in a sliding way; a buffer column 81 is arranged between the punch 6 and one end of the inner cavity of the sheath 8 far away from the lower template 2; the cushion column 81 is made of a rubber material; during the operation, the punch 6 is inserted into the inner cavity of the sheath 8, the buffer column 81 is arranged, finally the sheath 8 is arranged in the inner cavity of the fixed column 51, the fixed block 71 fixes the sheath 8 under the extrusion of the rotating rod 74, during the process of the punching operation, the existence of the sheath 8 can further play a role in protecting the punch 6, the punch 6 is prevented from being broken due to the overlarge instant stress, the damage of the device is caused, and the potential safety hazard is easily caused, meanwhile, during the punching operation of the punch 6, the existence of the buffer column 81 relieves the stress of the punch 6 to a certain extent, the punch 6 is prevented from being broken, when the stress cannot be completely resolved, the broken part of the punch 6 is relatively close to the lower end due to the existence of the sheath 8, at the moment, the punch 6 can be ground again, the punch 6 can be continuously used after being reprocessed, and the cost required by maintenance is effectively, the effect of saving the maintenance cost is achieved.

As an embodiment of the invention, a concave die 82 used in cooperation with the punch 6 is installed on one side of the lower template 2 close to the upper template 1; the lower template 2 is positioned below the female die 82 and is provided with a collecting groove 9; the collecting tank 9 is designed in a circular truncated cone shape; during operation, punching press is carried out to the piece under the cooperation of drift 6 and die 82, the back is accomplished in the punching press, the waste material, the residue is pushed down by drift 6 in the collecting vat 9, collecting vat 9 round platform shape design can prevent effectively that the waste material from blockking up collecting vat 9, and simultaneously, the existence of collecting vat 9 can avoid the during operation on the assembly line effectively, can avoid residue and waste material to receive the influence towards the piece precision at the punching press in-process effectively in continuous punching press process, make the finished product precision descend, thereby reduce the performance of product.

The specific working process is as follows:

when the punching machine works, the upper template 1 and the lower template 2 are respectively fixed on the punching machine and a machine table through bolts, the punch 6 is inserted into the inner cavity of the fixed column 51, the fastening ring 75 is rotated, the fastening ring 75 rotates to drive the rotating ring 73 to rotate, so that the rotating rod 74 rotates in the third groove 7, the rotating rod 74 extrudes the fixed block 71, so that the fixed block 71 moves towards the outside of the third groove 7, the punch 6 in the inner cavity of the fixed column 51 is extruded and fixed, at the moment, the fixed column 51 is inserted into the first groove 5, the extruding rod 54 is screwed, so that the extruding rod 54 ascends, so that the positioning balls in the second groove 52 are extruded and enter the guide groove 55 formed in the fixed column 51, the fixed column 51 is fixed in the first groove 5, the punching material is aligned with the positioning needle 37 and placed on the supporting plate 32, the punching machine is started, the upper template 1 is driven by the punching machine to be, in the process of downward pressing, the extrusion block 43 firstly contacts the punching material and extrudes the punching material downwards, the punching material is driven by the downward extrusion force to drive the support plate 32 to move downwards, in the process of downward moving of the support plate 32, the extrusion bag 33 fixedly connected in the second annular groove 31 is extruded, gas in the inner cavity is input into the inflation bag 36 through a conduit, the air pressure of the inflation bag 36 in the first chute 34 is increased, the fixed slide block 35 is extruded towards the outside of the first chute 34, so that the fixed slide block 35 uniformly arranged in the first chute 34 clamps and fixes the punching material from the side surface, meanwhile, as the upper template 1 is continuously pressed downwards, the sliding rod 42 gradually moves towards the inside of the second chute 41 and continuously applies downward pressure to the punching material, after the punching is completed, the upper template 1 moves upwards under the driving of the punching machine, at the moment, the extrusion block 43 fixedly connected to the lower surface of the sliding rod 42 still extrudes the punching material, as the upper template 1 moves upwards to a certain distance, the extrusion block 43 is separated from the stamping material, the supporting plate 32 is forced to disappear and moves upwards to reset under the action of the spring in the first annular groove 3, and when the supporting plate 32 resets, the gas in the inflatable bag 36 flows back to the extrusion bag 33, so that the fixed sliding block is driven to reset, and the stamping process is completed.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a high accuracy stamping die, includes cope match-plate pattern (1) and lower bolster (2), its characterized in that: a first annular groove (3) is formed in one side, close to the upper template (1), of the lower template (2); a second annular groove (31) is formed in one side, away from the upper template (1), of the first annular groove (3); a support plate (32) is elastically connected in the first annular groove (3) through a spring; the support plate (32) is of a "T" shaped design; a squeezing bag (33) is fixedly connected in the second annular groove (31); the lower template (2) is positioned at the outer side of the first annular groove (3) and is provided with first sliding grooves (34) which are uniformly distributed; the first sliding grooves (34) are internally and respectively connected with a fixed sliding block (35) in a sliding manner; an inflatable bag (36) is fixedly connected between the fixed sliding block (35) and one side of the first sliding groove (34) far away from the first annular groove (3); the inflatable bag (36) and the extrusion bag (33) are communicated through a conduit; the supporting plate (32) is fixedly connected with a positioning pin (37); one side of the upper template (1) close to the lower template (2) is fixedly connected with a guide rod (4); a second sliding chute (41) is formed in the guide rod (4); the second sliding groove (41) is designed in a T shape; a T-shaped sliding rod (42) is elastically connected in the second sliding groove (41) through a spring; the surface of one side of the sliding rod (42) close to the lower template (2) is fixedly connected with an extrusion block (43); the extrusion block (43) is made of rubber materials, and the lower surface of the extrusion block is rough;

a third sliding chute (44) is formed in the side surface of the sliding rod (42) far away from the lower template (2); the third runner (44) is of annular design; a ball (45) is connected in the third sliding groove (44) in a sliding manner; the inner wall of the third sliding chute (44) is elastically connected with an elastic plate (46);

a first groove (5) is formed in the surface of one side, close to the lower template (2), of the upper template (1); a fixed column (51) is arranged in the first groove (5); a second groove (52) is formed in one side, located on the first groove (5), of the upper template (1); the second groove (52) is designed in an inverted L shape; the second groove (52) is communicated with the first groove (5); a guide groove (55) is formed in the position, opposite to the second groove (52), of the fixing column (51); one side of the second groove (52) close to the fixing column (51) is connected with a positioning bead (53) in a sliding manner; an extrusion rod (54) is connected in the second groove (52) through threads; the fixing column (51) is hollow and a punch (6) is arranged in the inner cavity of the fixing column; third grooves (7) which are uniformly distributed are formed in the inner wall of the fixing column (51); the third grooves (7) are internally and slidably connected with fixing blocks (71); the fixing block (71) is designed into a cambered surface at one side close to the punch (6) and a slope at one side far away from the punch (6); a fourth groove (72) is formed in the fixed column (51) and located below the third groove (7), and the fourth groove (72) is communicated with the third groove (7); a rotating ring (73) is connected in the fourth groove (72) in a sliding manner; the surface of one side, close to the third groove (7), of the rotating ring (73) is fixedly connected with a rotating rod (74), and the rotating rod (74) extends into the third groove (7); the fourth groove (72) is arranged at the position, close to the side wall of the lower template (2), of the fixing column (51) and is designed to be opened; a fastening ring (75) is in threaded connection with the fixed column (51) at the opening of the fourth groove (72); the fastening ring (75) is fixedly connected with the rotating ring (73);

the surface of one side, close to the punch head (6), of the fixed block (71) is fixedly connected with an air cushion layer (76); the air cushion layer (76) is hollow and has a rough surface design; a rubber bag (77) is fixedly connected in the third groove (7) in the rotating direction of the rotating rod (74); the rubber bag (77) is of hollow design; the rubber bag (77) is communicated with the air cushion layer (76) through a conduit;

a sheath (8) is arranged in the inner cavity of the fixed column (51); the inner part of the sheath (8) is designed to be stepped and hollow; the punch (6) is connected with the inner cavity of the sheath (8) in a sliding manner; a buffer column (81) is arranged between the punch head (6) and one end of the inner cavity of the sheath (8) far away from the lower template (2); the buffer column (81) is made of rubber material;

a female die (82) matched with the punch (6) for use is arranged on one side, close to the upper template (1), of the lower template (2); the lower template (2) is positioned below the female die (82) and is provided with a collecting groove (9); the collecting groove (9) is designed in a circular truncated cone shape;

when the device works, the upper template (1) and the lower template (2) are respectively fixed on a punching machine and a machine table through bolts, the punch head (6) is inserted into the inner cavity of the fixed column (51), the fastening ring (75) is rotated, the fastening ring (75) rotates to drive the rotating ring (73) to rotate, so that the rotating rod (74) rotates in the third groove (7), the rotating rod (74) extrudes the fixed block (71), so that the fixed block (71) moves outwards from the third groove (7), the punch head (6) in the inner cavity of the fixed column (51) is extruded and fixed, at the moment, the fixed column (51) is inserted into the first groove (5), the extruding rod (54) is screwed, so that the extruding rod (54) rises, positioning beads in the second groove (52) are extruded and then enter the guide groove (55) formed in the fixed column (51), and the fixed column (51) is fixed in the first groove (5), the punching material aligning and positioning needle (37) is placed on the supporting plate (32), the punching machine is started, the upper die plate (1) is driven by the punching machine to be pressed downwards at a constant speed, in the pressing process, the extrusion block (43) firstly contacts the punching material and extrudes the punching material downwards, the punching material is driven by the force of downward extrusion to drive the supporting plate (32) to move downwards, in the moving process of the supporting plate (32), the extrusion bag (33) fixedly connected in the second annular groove (31) is extruded, the gas in the inner cavity is input into the inflating bag (36) through the conduit, the air pressure of the inflating bag (36) in the first sliding groove (34) is increased, the fixed sliding block (35) is extruded towards the outside of the first sliding groove (34), so that the fixed sliding block (35) uniformly arranged in the first sliding groove (34) clamps and fixes the punching material from the side surface, and simultaneously, along with the continuous pressing downwards of the upper die plate (1), the sliding rod (42) gradually moves towards the inside of the second sliding groove (41, and downward pressure is continuously applied to the punching material, after the punching is finished, the upper die plate (1) is driven by the punching machine to move upwards, the extrusion block (43) fixedly connected with the lower surface of the sliding rod (42) still extrudes the punching material, the extrusion block (43) is separated from the punching material after the upper die plate (1) moves upwards for a certain distance, the supporting plate (32) is stressed and disappears to move upwards for resetting under the action of a spring in the first annular groove (3), and when the supporting plate (32) resets, gas in the inflatable bag (36) flows back to the extrusion bag (33), so that the fixed sliding block (35) is driven to reset, and a punching process is finished.