CN113751579B

CN113751579B - Micropore blanking die

Info

Publication number: CN113751579B
Application number: CN202111130624.1A
Authority: CN
Inventors: 郑岩; 芦甲强; 郭晓伟
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2024-04-30
Anticipated expiration: 2041-09-26
Also published as: CN113751579A

Abstract

The invention discloses a micro-hole blanking die which comprises a lower die structure, an upper die structure, a middle die structure and a micro-hole blanking structure, wherein the micro-hole blanking structure comprises a punch fixing seat, a punch, a cushion block and a stripper plate part, the punch is arranged on the punch fixing seat, the cushion block is arranged above the punch fixing seat, the stripper plate part is arranged below the punch fixing seat, and a guide through hole for the punch to penetrate is formed in the stripper plate part; the middle die structure comprises a lower stripper plate structure, at least one upper stripper plate structure and an elastic floating connecting structure arranged between the lower stripper plate structure and the upper stripper plate structure, wherein the lower stripper plate structure is vertically arranged above the lower die structure in a sliding manner, a first material belt channel is formed between the lower stripper plate structure and the lower stripper plate structure, a cushion block, a punch fixing seat and a punch are arranged on the upper stripper plate structure, and stripper plate components are arranged in a second installation through hole of the lower stripper plate structure; the upper die structure is provided with at least one pushing structure, and the pushing structure corresponds to the upper stripper plate structure one by one. The invention can reduce the processing cost and ensure the blanking precision while ensuring the blanking strength, and is more convenient for the later maintenance.

Description

Micropore blanking die

Technical Field

The invention belongs to the technical field of punching of microporous structure products, and particularly relates to a microporous punching die.

Background

In general, a metal mesh belt for carrying a sounding module in an electronic product has a microporous structure, wherein the number of micropores is about 500, the phi of the micropores is 0.2mm, the pitch of the holes is 0.39mm multiplied by 0.46mm, and the total project requirement is 250 ten thousand. Because of the large number of micropores of a single product, small hole pitch and large project demand, the production and manufacture of the metal mesh have great difficulty and challenges. As is known, the existing micropore forming mode mainly comprises die blanking and etching, and the appearance of the etched micropore is burr-free, but the etching processing precision is poor, the unit price of the product is higher, and the market requirement cannot be met; the punch structure for processing the hole in the die blanking process is directly fixed on the upper die structure, the later-period disassembly maintenance of the punch structure is inconvenient, the length of the punch structure is at least 50.3mm, the strength is not high during blanking, mass production cannot be realized, the manufacturing cost of the punch is high, in addition, the diameter of the working part of the punch is only 0.2mm, the existing punch structure is not provided with a guide part, the guide cannot be carried out during blanking, the punch is easy to bend and break, and the blanking precision is influenced.

Disclosure of Invention

Aiming at overcoming at least one defect in the prior art, the invention solves the technical problems of providing a micro-hole blanking structure and a micro-hole blanking die; while ensuring the blanking strength, the processing cost can be reduced, the blanking precision can be ensured, and the later maintenance is more convenient.

In order to solve the technical problems in the prior art, an embodiment of the present invention provides a micro-hole blanking structure, including:

A punch fixing seat;

the punch is arranged at the lower part and extends out of the punch fixing seat;

the cushion block is arranged above the punch fixing seat and used for compensating the processing length of the punch so as to share blanking force;

The stripper plate part is positioned below the punch fixing seat, and is internally provided with a guide through hole for the lower part of the punch to penetrate out and used for limiting and guiding the punch during punching.

Further, the punch comprises a limiting head part, a reinforcing part and a blanking part which are connected in sequence and gradually reduced in radial dimension;

the lower end face of the limiting head part is in arc transition connection with the peripheral face of the reinforcing part, and the peripheral face of the reinforcing part is in arc transition connection with the peripheral face of the blanking part.

Further, a third mounting groove for accommodating the limiting head part is formed in the top of the punch fixing seat, and a first mounting through hole penetrating through the punch fixing seat and matched with the reinforcing part is formed in the bottom of the third mounting groove;

The guide through hole comprises a first hole section matched with the reinforcing part, a second hole section with the radial size larger than that of the first hole section and a third hole section matched with the blanking part.

The embodiment of the invention also provides a micro-hole blanking die, which comprises a lower die structure, an upper die structure and a middle die structure, wherein the upper die structure is vertically connected with the lower die structure in a sliding fit manner, and the middle die structure is arranged between the lower die structure and the upper die structure; the micro-hole blanking structure is also included;

The middle mold structure comprises a lower stripper plate structure, at least one upper stripper plate structure and an elastic floating connection structure arranged between the upper stripper plate structure and the lower stripper plate structure; the lower stripper plate structure is vertically arranged above the lower die structure in a sliding manner, and a first material belt channel is formed between the lower stripper plate structure and the lower die structure;

the cushion block, the punch fixing seat and the punch are arranged on the upper stripper plate structure; the lower stripper plate is provided with a second mounting through hole, and the stripper plate component is mounted in the second mounting through hole.

Further, at least one pushing structure is arranged on the upper die structure, and the pushing structure corresponds to the upper stripper plate structure one by one; when the upper die structure moves downwards to a proper position, the punch stretches out of the lower stripper plate structure to be abutted with the material belt; the pushing structure is used for pushing the corresponding upper stripper plate structure to continuously move downwards and driving the punch on the upper stripper plate structure to punch the material belt.

Further, the lower die structure comprises a base, and at least one lower die unit is slidably arranged on the base;

the upper die structure comprises an upper die base and at least one upper die unit arranged at the bottom of the upper die base;

The middle die structures, the lower die units and the upper die units are identical in number and correspond to each other one by one; the pushing structure is arranged on the upper die unit.

Further, the pushing structure comprises a pushing piece slidably mounted on the upper die unit and a power piece arranged on the upper die holder and used for driving the pushing piece to move;

The upper stripper plate is provided with a protruding structure, and the bottom of the pushing piece is provided with a groove structure which is used for being matched with the protruding structure; or the upper stripper plate is provided with a groove structure, and the bottom of the pushing piece is provided with a convex structure which is used for being matched with the groove structure; the two opposite side surfaces of the convex structure along the driving direction are guide inclined surfaces;

the groove structure is aligned with the protrusion structure before blanking; the pushing piece moves under the drive of the power piece during blanking, the groove structure is staggered with the protruding structure, and the upper stripper structure is forced to move downwards.

Further, the lower die unit comprises a body structure, a fourth mounting groove is formed in the body structure, and a lower die ejector rod and a reset elastic piece are slidably mounted in the fourth mounting groove; one end of the reset elastic piece is abutted with the lower die ejector rod, and the other end of the reset elastic piece is abutted with the bottom of the fourth mounting groove;

The body structure is provided with a lower die guide post, the lower stripper plate structure is slidably arranged on the lower die guide post, and the bottom of the lower stripper plate structure is abutted to the lower die ejector rod.

Further, the elastic floating connecting structure comprises a guide piece and an elastic piece, wherein the guide piece is fixed on the upper release plate structure, and the lower end of the guide piece is connected with the lower release plate structure in a sliding fit manner; the bottom of going up the take off the plate structure is equipped with first mounting groove, the top of taking off the plate structure down is equipped with the second mounting groove, the elastic component cover is established stretch into first mounting groove with in the second mounting groove on the guide, and both ends respectively with first mounting groove with the tank bottom butt of second mounting groove.

Further, the micro-hole blanking die further comprises a material belt stirring structure which is arranged on the lower die structure and used for driving the material belt to advance in a set step length;

The material belt stirring structure comprises a base and a top seat, a second material belt channel is arranged in the top seat, and an avoidance notch which extends along the stirring direction of the material belt and is communicated with the second material belt channel is arranged at the bottom of the top seat;

The base is provided with a travel control port, a poking block is slidably arranged in the travel control port, and an elastic poking structure with the top capable of extending into the avoidance notch is arranged on the poking block;

The base is provided with a power mechanism for driving the stirring block to move, the power mechanism drives the stirring block to move forward, the elastic stirring structure stirs the positioning hole on the material belt to enable the material belt to advance, and the power mechanism drives the stirring block to move backward, and the elastic stirring structure is separated from the positioning hole to avoid driving the material belt to retreat.

Further, a notch extending along the driving direction is formed in the stirring block, and a containing groove is formed in the bottom of the notch;

The elastic material stirring structure comprises a hinged plate hinged in the notch, a material stirring plate arranged on the hinged plate and a spring arranged in the accommodating groove; one end of the spring is abutted with the stirring plate or the hinged plate, and the other end of the spring is abutted with the bottom of the accommodating groove;

The upper stream to the lower stream along the advancing direction of the material belt, the top surface of the material stirring plate comprises a first inclined surface, a first plane, a second inclined surface and a second plane which are sequentially connected, a stirring corner part with a right trapezoid or right triangle cross section is arranged on the second plane, and the inclined waist surface or the inclined edge surface of the stirring corner part is coplanar with the second inclined surface.

Further, the material belt stirring structure further comprises two travel adjusting structures arranged on the lower die structure, and the two travel adjusting structures are distributed on two sides of the base along the direction perpendicular to the advancing direction of the material belt;

The stroke adjusting structure comprises a driving piece and a limiting block connected with the driving piece; the base is provided with an opening, and the limiting block can extend into the stroke control opening through the opening.

Due to the adoption of the technical scheme, the beneficial effects are as follows:

the micropore blanking structure comprises a punch fixing seat, a punch, a cushion block and a stripper plate part;

The punch is arranged on the punch fixing seat, and the lower part of the punch extends out of the punch fixing seat; the cushion block is arranged above the punch fixing seat and is used for compensating the processing length of the punch so as to share the blanking force; the stripper plate part is positioned below the punch fixing seat, and is internally provided with a guide through hole for the lower part of the punch to penetrate out and used for limiting and guiding the punch during punching. The additional arrangement of the cushion block can shorten the manufacturing length of the punch, the manufacturing cost can be reduced by improving the blanking strength, the additional arrangement of the stripper plate part can ensure that the punch is bent and broken in the blanking process, and the blanking precision is further ensured.

The micropore blanking die comprises a lower die structure, an upper die structure and a middle die structure, wherein the upper die structure is vertically connected with the lower die structure in a sliding fit manner; the micro-hole blanking structure is also included; the middle mold structure comprises a lower take-off plate structure, at least one upper take-off plate structure and an elastic floating connection structure arranged between the upper take-off plate structure and the lower take-off plate structure; the lower stripper plate structure is vertically arranged above the lower die structure in a sliding manner, and a first material belt channel is formed between the lower stripper plate structure and the lower die structure; the cushion block, the punch fixing seat and the punch are integrally arranged on the upper stripper plate structure; the lower stripper plate is provided with a second mounting through hole, and the stripper plate component is arranged in the second mounting through hole. Under the action of external force, the upper die structure forces the middle die structure to move downwards integrally, after the lower stripper structure moves to compress the material belt, the upper stripper structure is forced to move downwards continuously, the elastic floating connecting structure compresses, and the punch head stretches out of the lower stripper structure under the guidance of the stripper part to precisely punch the material belt. When the punch is maintained, the upper stripper plate structure is only required to be taken out, and the punch is taken out, so that the whole operation is rapid and convenient.

In conclusion, the embodiment of the invention can reduce processing cost and ensure blanking precision while ensuring blanking strength, and is more convenient for later maintenance.

Drawings

FIG. 1 is a schematic structural view of the micro-hole blanking structure of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an exploded view of the structure of FIG. 1;

FIG. 4 is a schematic view of the punch of FIG. 3;

FIG. 5 is a schematic view of the micro-hole blanking die of the present invention;

FIG. 6.1 is a partial cross-sectional view of a middle mold structure;

Fig. 6.2 is a schematic view of the mounting structure of the micro-hole blanking structure in fig. 6.1;

FIG. 7 is an exploded view of the structure of FIG. 5;

FIG. 8 is a side view of the micro-hole blanking die (including a portion of the internal structure) with the upper die structure moved into place

FIG. 9 is a schematic view of the upper die structure of FIG. 7;

FIG. 10 is an exploded view of the structure of FIG. 9;

FIG. 11 is an exploded view of the strap toggle mechanism of FIG. 7;

FIG. 12 is a cross-sectional view of FIG. 11 (hidden roof)

FIG. 13 is a reference view showing a state in which the punch is abutted against the material tape before the pushing mechanism is operated;

fig. 14 is a reference view showing a state in which the punch punches a material belt after the pushing structure is operated;

in the figure: 1-punch fixing seat, 11-third mounting groove, 12-first mounting through hole, 2-punch, 21-limit head, 22-reinforcing part, 23-blanking part, 3-cushion block, 4-stripper part, 41-guide through hole, 411-first hole section, 412-second hole section, 413-third hole section, 5-lower die structure, 51-base, 52-lower die unit, 521-lower die holder, 522-lower pad, 523-lower die plate, 524-fourth mounting groove, 525-lower die ejector rod, 526-reset elastic piece, 527-lower die guide post, 53-guide shaft structure, 54-spring, 6-upper die structure, 61-upper die holder, 611-guide sleeve structure, 62-upper die unit, 621-upper pad, 6211-chute, 622-upper clamping plate, 6221-dodge port, 63-pushing structure, 631-pushing member, 6311-groove structure, 632-power member, 7-middle mold structure, 71-upper stripper plate structure, 711-middle pad, 7111-protrusion structure, 7112-guide slope, 712-middle clamping plate, 7121-first through hole, 72-lower stripper plate structure, 721-stripper plate, 7211-first through hole, 722-stripper plate, 7221-second through hole, 73-middle mold guide post, 74-elastic floating connection structure, 741-guide member, 742-elastic member, 8-belt toggle structure, 81-base, 811-travel control port, 812-toggle block, 8121-notch, 813-power mechanism, 814-opening, 82-footstock, 821-top cover, 822-pressing plate, 8221-avoiding notch, 83-elastic material shifting structure, 831-hinged plate, 832-material shifting plate, 8321-first inclined plane, 8322-first plane, 8323-second inclined plane, 8324-second plane, 8325-shifting corner, 833-spring, 84-stroke adjusting structure, 841-driving piece, 842-limiting block, 9-material belt, a-micropore blanking structure.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Embodiment one:

As shown in fig. 1 to 4 together, the present embodiment discloses a micro-hole blanking structure a, which specifically includes a punch holder 1, a punch 2, a spacer 3, and a stripper member 4. Wherein, the punch 2 is arranged on the punch fixing seat 1 and the lower part of the punch extends out of the punch fixing seat 1; the cushion block 3 is arranged above the punch fixing seat 1 and is used for compensating the processing length of the punch 2 so as to share the blanking force; the stripper plate 4 is located below the punch holder 1, and has a guide through hole 41 for the lower part of the punch 2 to pass through, and is used for limiting and guiding the punch 2 during punching to prevent bending or breaking.

In this embodiment, the punch 2 includes a limit head 21, a reinforcement 22 and a blanking portion 23 which are connected in order and gradually reduced in radial dimension; the lower end face of the limiting head 21 is in arc transition connection with the peripheral face of the reinforcing part 22, and in the die opening process, the transition connection can effectively improve the effect of the blanking reaction force on the punch 2, reduce the risk of breakage of the punch 2 and further reduce the repairing times of the punch 2. The peripheral surface of the reinforcing part 22 is in arc transition connection with the peripheral surface of the blanking part 23; the transitional connection structure can effectively increase the strength of the punch head 2, reduce the processing difficulty and greatly save the processing cost. In the present embodiment, the diameter of the blanking portion 23 is equal to the diameter D to be punched, and the diameter D to be punched is 0.15mm or more; the diameter D1 of the reinforcing part 22 is more than or equal to 0.8mm, and the diameter of the limit head part 21 is more than or equal to 2mm; the length of the punch head 2 is 33-36 mm, the length of the limiting head 21 is 2.8-3.2 mm, and the length of the blanking part 23 is 3.0-3.2 mm.

The top of the punch fixing seat 1 is provided with a third mounting groove 11 (two are shown in the drawings of the embodiment according to the required number of the punches 2 and correspondingly increased) for accommodating the limiting head 21, and the bottom of the third mounting groove 11 is provided with a first mounting through hole 12 penetrating through the punch fixing seat 1 and matched with the reinforcing part 22; the guide through hole 41 comprises a first hole section 411 adapted to the reinforcement 22, a second hole section 412 having a radial dimension larger than the first hole section 411, and a third hole section 413 adapted to the blanking 23. The guide gap of the first hole section 411 is 0.005mm, and the punch 2 can be ensured to smoothly move in the stripper plate part 4 by PG processing; the PG processes the second hole section 412 (the grinding wheel tool withdrawal clearance), so that the processing precision can be ensured, the rejection rate of the parts can be reduced, and the cost of the parts can be saved; the pilot clearance of the third hole section 413, 0.003mm, is machined by PG, which clearance ensures the accuracy of the punch 2 during movement to ensure the accuracy of the final blanking.

In summary, the processing length of the punch head 2 can be shortened by adding the cushion block 3, the processing cost can be reduced by improving the blanking strength, and bending and breaking of the punch head 2 in the blanking process can be ensured by adding the stripper plate part 4, so that the blanking precision is ensured.

Embodiment two:

As collectively shown in fig. 5 to 8, the present embodiment discloses a micro-hole blanking die, which comprises a lower die structure 5, an upper die structure 6 connected with the lower die structure 5 in a vertically sliding fit manner, and a middle die structure 7 arranged between the lower die structure 5 and the upper die structure 6; also included is the micro-hole blanking structure a disclosed in embodiment one. Wherein the middle mold structure 7 comprises a lower stripper plate structure 72, at least one upper stripper plate structure 71, and an elastic floating connection structure 74 disposed between the upper stripper plate structure 71 and the lower stripper plate structure 72; the lower stripper plate structure 72 is vertically arranged above the lower die structure 5 in a sliding manner, and a first material belt channel is formed between the lower stripper plate structure and the lower die structure; the cushion block 3, the punch fixing seat 1 and the punch 2 are arranged on the upper stripper plate structure 71; the lower stripper plate structure 72 is provided with a mounting through hole in which the stripper plate member 4 is disposed. Under the action of external force, the upper die structure 6 forces the middle die structure 7 to move downwards, after the lower stripper plate structure 72 cannot move due to the lower die structure 5 (the material belt 9 is pressed at this time), the upper stripper plate structure 71 is forced to move downwards continuously, the elastic floating connecting structure 74 compresses, and the punch 2 extends out of the stripper plate part 4 and the lower stripper plate structure 72 to precisely punch the material belt 9 under the guidance of the guide through hole 41. When the punch 2 is maintained, the whole die can be quickly and conveniently operated without disassembling the whole die only by taking out the upper stripper plate structure 71 and taking out the punch 2.

The upper release plate structure 71 comprises a middle base plate 711 and a middle clamping plate 712 which are fixedly connected from top to bottom, a first through hole 7121 is arranged on the middle clamping plate 712, and a first limiting step is arranged on the first through hole 7121; when the punch fixing seat 1 and the punch 2 are installed in the first through hole 7121, the second limiting step on the punch fixing seat 1 is abutted with the first limiting step, and the punch fixing seat is prevented from falling out from the lower part of the first through hole 7121; the cushion block 3 is then mounted in the first through hole 7121 above the punch holder 1, and the middle pad 711 mounted above the middle clamping plate 712 can position the punch holder 1, the punch 2 and the cushion block 3.

The lower stripper plate structure 72 comprises a stripper plate 722 and a stripper plate 721, wherein a groove is formed in the top of the stripper plate 722, and the stripper plate 721 is arranged in the groove; the second mounting through hole comprises a first through hole 7211 which is arranged on the stripper plate 721 and is matched with the punch fixing seat 1, and a second through hole 7221 which is arranged on the stripper plate 722 and is used for embedding the stripper plate component 4, the stripper plate component 4 is provided with a third limit step, the second through hole 7221 is provided with a fourth limit step, the third limit step is in butt joint with the fourth limit step, and the stripper plate component 4 is prevented from being separated from the lower part of the second through hole 7221.

In order to further ensure the stability and the accuracy of the relative movement of the upper stripper plate 71 and the lower stripper plate 72, the embodiment is provided with a middle mold guide post 73 on the upper stripper plate 71, and the lower end of the middle mold guide post 73 is connected with the lower stripper plate 72 in a sliding fit manner.

In this embodiment, the elastic floating connection structure 74 includes a guide 741 and an elastic member 742, the guide 741 is fixed on the middle pad 711 of the upper release plate structure 71, and the lower end of the guide 741 is connected with the lower release plate structure 72 in a sliding fit manner; the bottom (middle clamping plate 712) of the upper stripper plate structure 71 is provided with a first mounting groove, the top (stripper plate 721) of the lower stripper plate structure 72 is provided with a second mounting groove, and an elastic member 742 is sleeved on a guide member 741 extending into the first mounting groove and the second mounting groove, and two ends of the elastic member are respectively abutted with the bottoms of the first mounting groove and the second mounting groove. In still other embodiments, the resilient floating connecting structure 74 includes only a spring that is disposed within the mounting space formed by the first mounting groove and the second mounting groove.

In order to facilitate independent punching of the upper punches 2 of the different upper stripper structures 71 to meet the punching of the micropores with different intervals/numbers, the universality is increased, the embodiment is further optimized, so that the punching is not completely dependent on the movement of the upper die structure 6, and at least one pushing structure 63 is arranged on the optimized upper die structure 6, and the pushing structures 63 are in one-to-one correspondence with the upper stripper structures 71; when the upper die structure 6 moves downwards to a proper position, the punch 2 extends out of the lower stripper plate structure 72 to be abutted with the material belt 9; the pushing structure 63 is used for pushing the corresponding upper stripper plate structure 71 to move downwards and drive the punch 2 thereon to punch the material belt 9 (see fig. 13 and 14).

In order to further increase versatility and ease of maintenance of the micro-hole blanking die, in this embodiment, the lower die structure 5 includes a base 51, and at least one lower die unit 52 (two lower die units 52 are shown in the drawing) is slidably mounted on the base 51; the upper die structure 6 comprises an upper die holder 61 and at least one upper die unit 62 (two upper die units 62 are shown in the figure) arranged at the bottom of the upper die holder 61; the middle die structures 7, the lower die units 52 and the upper die units 62 are arranged in the same number and in one-to-one correspondence; the pushing structures 63 are provided on the upper die unit 62 (the number of the pushing structures is in one-to-one correspondence with the upper stripper structures 71 on the corresponding intermediate die structure 7). The number of the middle die structures 7, the lower die units 52 and the upper die units 62 can be reasonably set according to the production needs and the requirements of products, and the pushing structures 63 can be controlled to act in a set sequence or simultaneously according to the intervals and the arrangement forms of the micropores. The universality is increased, and meanwhile, the maintenance without stopping the machine is more convenient to realize.

In this embodiment, the implementation manner of the relative vertical sliding of the lower die structure 5 and the upper die structure 6 is as follows: the base 51 is provided with a plurality of guide shaft structures 53, the guide shaft structures 53 are sleeved with springs 54, the upper die holder 61 is provided with a guide sleeve structure 611 connected with the guide shaft structures 53 in a sliding fit mode, one end of each spring 54 is abutted with the guide sleeve structure 611, and the other end of each spring 54 is abutted with a table joint surface on the guide shaft structures 53 or the base 51.

As shown in fig. 9 and 10 together, in the present embodiment, the pushing structure 63 includes a pushing member 631 horizontally slidably mounted on the upper die unit 62 and a power member 632 provided on the upper die holder 61 for driving the pushing member 631 to move; the upper stripper plate 71 is provided with a protruding structure 7111, and the bottom of the pushing member 631 is provided with a groove structure 6311 for adapting to the protruding structure 7111; opposite sides of the projection structure 7111 (trapezoid structure) in the driving direction are guide slopes 7112. The blanking front groove structure 6311 is aligned with the projection structure 7111; the pusher 631 moves under the drive of the power member 632, the groove structure 6311 is staggered from the projection structure 7111, and the groove side walls of the groove structure 6311 cooperate with the guide inclined surfaces 7112 to force the upper stripper plate structure 71 to move downward (see fig. 13 and 14). In still other embodiments, the upper stripper plate 71 has a groove structure 6311 and the bottom of the pusher 631 has a protrusion structure 7111 for mating with the groove structure 6311.

In this embodiment, the upper die unit 62 includes an upper pad 621 and an upper clamping plate 622 connected in order from top to bottom; the upper plate 621 is provided with a chute 6211 for mounting the pusher 631, and the upper plate 622 is provided with a dodging port 6221 which communicates with the chute 6211 and is used for dodging the pusher 631.

In this embodiment, the lower die unit 52 includes a body structure (the body structure is composed of a lower die holder 521, a lower pad 522 and a lower die plate 523), a fourth mounting groove 524 is provided on the body structure, and a lower die ejector rod 525 and a reset elastic member 526 are vertically slidably mounted in the fourth mounting groove 524; one end of the reset elastic piece 526 is abutted with the lower die ejector rod 525, and the other end is abutted with the bottom of the fourth mounting groove 524; the body structure is provided with a lower die guide column 527, the lower stripper plate structure 72 is slidably mounted on the lower die guide column 527, and the bottom is abutted with the lower die ejector rod 525.

As shown in fig. 11 and 12 together, the micro-hole punching die of the present embodiment further includes a belt poking structure 8 provided on the base 51 for driving the belt 9 to advance in a set step; the material belt stirring structure 8 comprises a base 81 and a top seat 82, the top seat 82 comprises a top cover 821 and a pressing plate 822, a second material belt channel is formed between the top cover 821 and the pressing plate 822, and an avoidance notch 8221 which extends along the stirring direction of the material belt 9 and is communicated with the second material belt channel is formed at the bottom of the pressing plate 822; the base 81 is provided with a travel control opening 811, a poking block 812 is slidably arranged in the travel control opening 811, and the poking block 812 is provided with an elastic poking structure 83 of which the top can extend into the avoidance notch 8221; the base 81 is provided with a power mechanism 813 (preferably an air cylinder in the embodiment) for driving the stirring block 812 to move, when the power mechanism 813 drives the stirring block 812 to move forward, the elastic stirring structure 83 stirs the positioning hole on the material belt 9 to enable the material belt 9 to advance, and when the power mechanism 813 drives the stirring block 812 to move backward, the elastic stirring structure 83 is separated from the positioning hole to prevent the material belt 9 from being driven to retreat.

The stirring block 812 is provided with a notch 8121 extending along the driving direction, and the bottom of the notch 8121 is provided with a containing groove; the elastic material shifting structure 83 comprises a hinged plate 831 hinged in the notch 8121, a material shifting plate 832 arranged on the hinged plate 831 and a spring 833 arranged in the accommodating groove; one end of the spring 833 is abutted with the stirring plate 832 or the hinged plate 831, and the other end is abutted with the bottom of the accommodating groove; the top surface of the shifting plate 832 from upstream to downstream along the advancing direction of the material belt 9 comprises a first inclined surface 8321, a first plane 8322, a second inclined surface 8323 and a second plane 8324 which are sequentially connected, wherein a shifting corner 8325 (matched with a positioning hole on the material belt 9) with a right trapezoid or right triangle cross section is arranged on the second plane 8324, and the inclined waist surface or the inclined side surface of the shifting corner 8325 is coplanar with the second inclined surface 8323. When the power mechanism 813 reversely drives the stirring block 812 to move, the stirring plate 832 and the hinged plate 831 rotate around the hinge point, the compression spring 833 is used for pushing the corner 8325 to be separated from the positioning hole, after the power mechanism 813 moves in place, the spring 833 is reset, and the stirring plate 832 is used for pushing the corner 8325 to enter another positioning hole at the downstream so as to prepare for stirring the material belt 9 again.

In general, the interval between micropores in one micropore unit group on one material belt 9 is D4, the interval between two micropore unit groups is D5, and D5 is greater than D4, so that in order to meet the above requirement, the material belt 9 needs to be stirred for advancing with different step sizes; therefore, the material belt stirring structure 8 in this embodiment further includes two travel adjustment structures 84 disposed on the base 51, and the two travel adjustment structures 84 are distributed on two sides of the base 81 along a direction perpendicular to the advancing direction of the material belt 9; the stroke adjustment structure 84 includes a driving member 841 and a stopper 842 connected to the driving member 841; the base 81 is provided with an opening 814, and the stopper 842 can extend into the travel control opening 811 through the opening 814. In still other embodiments, the power mechanism 813 is a directly stepless adjustment drive mechanism, in which case the travel adjustment structure 84 may be omitted.

The blanking process will be briefly described based on the above-described structure:

The material belt stirring structure 8 drives the material belt 9 to advance by one step. The upper die structure 6 is driven by the power of the punch press and moves towards the lower die structure 5 (the springs 54 are compressed) under the guidance of the guide sleeve structure 611 and the guide shaft structure 53, after the lower die unit 52 is abutted against the middle die structure 7 (when the groove structure 6311 is aligned with the protruding structure 7111), blanking force is transmitted to the middle die structure 7, all the middle die structures 7 are integrally moved downwards under the guidance of the lower die guide post 527, the lower die ejector rods 525 are lowered and the reset elastic pieces 526 are compressed, all the upper stripper structures 71 still continue to move downwards after the lower stripper structure 72 is stationary due to the limitation of the lower die plate 523 in the lower die structure 5 (when the middle die guide post 73 can ensure the stability and precision of the relative movement), the elastic pieces 742 in the elastic floating connecting structure 74 are compressed, and when the upper die structure 6 moves into place (when the punch 2 extends out of the stripper plate part 4 and the lower stripper structure 72 is abutted against the material belt 9 (see fig. 13), and then the corresponding pushing structure 63 is controlled by the control cabinet according to the blanking requirement according to the preset action sequence, so that the corresponding upper stripper structure 71 is pushed to continue to move downwards, and the blanking belt 2 starts to perform blanking on the material belt 9 (see fig. 13). After the blanking is completed, the die is opened, the power from the punch is eliminated, the upper die structure 6 moves upwards to reset under the action of the spring 54, meanwhile, the lower die ejector rod 525 moves upwards under the action of the reset elastic piece 526, at this time, the upper stripper plate structure 71 and the lower stripper plate structure 72 recover to the initial state under the action of the elastic force of the elastic piece 742 in the elastic floating connecting structure 74, and the punch 2 retracts to the stripper plate part 4 and the lower stripper plate structure 72.

In the drawing of the embodiment, two groups of lower die units 52, middle die structures 7 and upper die units 62 are arranged in the micro-hole blanking die, and two upper stripper structures 71 are arranged on one group of middle die structures 7; therefore, the pushing structure 63 can be controlled to act sequentially, alternately or simultaneously according to actual needs, any one/two or all of the actions of the upper stripper plate structure 71 can be realized, so that the blanking of the material strips 9 by different numbers of punches 2 can be realized, and the production efficiency is improved; and be convenient for realize not shutting down and maintain, the material area is stirred structure 8 drive material area 9 and is advanced the step length adjustable, consequently can reduce the quantity of drift 2, through adjusting the step length that material area 9 advances, utilizes a small amount of drift 2 to accomplish furthest's micropore quantity.

In summary, the embodiment of the invention can reduce the manufacturing cost and ensure the blanking precision while ensuring the blanking strength, thereby being more convenient for the later maintenance.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. The utility model provides a micropore blanking die, includes the lower mould structure, with the vertical slip fit of lower mould structure is connected go up mould structure and set up in lower mould structure with go up well mould structure between the mould structure, its characterized in that still includes micropore blanking structure, micropore blanking structure includes:

A punch fixing seat;

the punch is arranged on the punch fixing seat, and the lower part of the punch extends out of the punch fixing seat;

The stripper plate part is positioned below the punch fixing seat, and is internally provided with a guide through hole for the lower part of the punch to penetrate out and used for limiting and guiding the punch during punching;

the cushion block, the punch fixing seat and the punch are arranged on the upper stripper plate structure; the lower stripper plate structure is provided with a mounting through hole, and the stripper plate component is mounted in the mounting through hole;

the upper die structure is provided with at least one pushing structure, and the pushing structures are in one-to-one correspondence with the upper stripper plate structures; when the upper die structure moves downwards to a proper position, the punch stretches out of the lower stripper plate structure to be abutted with the material belt, the pushing structure is used for pushing the corresponding upper stripper plate structure to move downwards continuously and driving the punch on the pushing structure to punch the material belt.

2. The micro-hole blanking die of claim 1, wherein the punch includes a limiting head portion, a reinforcing portion and a blanking portion which are connected in sequence and gradually reduced in radial dimension;

3. The micro-hole blanking die of claim 2, wherein a third mounting groove for accommodating the limiting head is formed in the top of the punch fixing seat, and a mounting through hole penetrating the punch fixing seat and matched with the reinforcing part is formed in the bottom of the third mounting groove;

4. The micro-hole blanking die of claim 1, wherein the lower die structure includes a base on which at least one lower die unit is slidably mounted;

5. The micro-hole blanking die of claim 4, wherein the pushing structure comprises a pushing member slidably mounted on the upper die unit and a power member provided on the upper die base for driving the pushing member to move;

6. The fine blanking die of claim 4, wherein the lower die unit includes a body structure provided with a fourth mounting groove, and the fourth mounting groove is slidably provided with a lower die ejector rod and a return elastic member; one end of the reset elastic piece is abutted with the lower die ejector rod, and the other end of the reset elastic piece is abutted with the bottom of the fourth mounting groove;

7. The micro-hole blanking die of claim 1, wherein the elastic floating connection structure comprises a guide member and an elastic member, the guide member is fixed on the upper stripper plate structure, and the lower end of the guide member is connected with the lower stripper plate structure in a sliding fit manner; the bottom of going up the take off the plate structure is equipped with first mounting groove, the top of taking off the plate structure down is equipped with the second mounting groove, the elastic component cover is established stretch into first mounting groove with in the second mounting groove on the guide, and both ends respectively with first mounting groove with the tank bottom butt of second mounting groove.

8. The micro-hole blanking die of claim 1, further comprising a strap poking structure provided on the lower die structure for driving the strap forward in a set step size;

9. The micro-hole blanking die of claim 8, wherein the poking block is provided with a notch extending along the driving direction, and the bottom of the notch is provided with a containing groove;

10. The micro-hole blanking die of claim 8, wherein the material belt stirring structure further comprises two travel adjusting structures arranged on the lower die structure, wherein the two travel adjusting structures are distributed on two sides of the base along a direction perpendicular to the advancing direction of the material belt;