CN211938665U - Continuous stamping die - Google Patents

Abstract

The utility model discloses a continuous stamping die, it includes the template and installs the edge of a knife that dashes the locating hole edge of a knife, blanking edge of a knife, pressure deckle edge part and cut off the product at last in the template, and pressure deckle edge part sets up at the back of the blanking edge of a knife, and continuous stamping die is still including beating the recess part, beats the recess part and sets up in the front of dashing the locating hole edge of a knife and the blanking edge of a knife, beats the recess of recess part on metal material.

Description

Continuous stamping die

Technical Field

The utility model relates to a mould structure, concretely relates to continuous stamping die.

Background

The stamping die is a special process equipment for processing materials (metal or nonmetal) into parts (or semi-finished products) in cold stamping processing, and is called a cold stamping die (commonly called a cold stamping die). Stamping is a press working method in which a die mounted on a press is used to apply pressure to a material at room temperature to cause separation or plastic deformation of the material, thereby obtaining a desired part.

The progressive die is a cold stamping die which adopts a strip-shaped stamping raw material in a stamping stroke of a press machine and simultaneously completes a plurality of stamping processes on a pair of dies by using a plurality of different stations, and the material strip moves once at a fixed distance every time the dies complete stamping until the product is completed.

In many cases, in metal stamped products, it is desirable to remove metal burrs from the product. For example, when the punched product is used as various tools and living goods which need to be touched by a certain part of a body, or when the punched product needs to be automatically assembled in a post-working section, metal burrs must be removed so as not to scratch the skin, or the assembly efficiency is influenced. Burrs are an inevitable defect characteristic of the stamping and blanking process. To remove this process defect, it can only be removed by post-processing. For example, the metal blank may be removed by grinding with various grinding machines, or by beating the punched metal blank again with a deburring process. In a continuous stamping die, the die designer will often design one or more deburring stations after the blanking station to remove burrs from the product blank. This kind of technology of deckle edge, no matter single stamping die or continuous stamping die, all need carry out the accurate positioning to the product blank on the deburring station, otherwise just can not even effectual the patting get rid of the deckle edge. As long as the burr pressing station is designed on the continuous stamping die, the positioning parts on the continuous stamping die can be used for positioning, and most of metal burrs on the product are accurately removed. However, there is always such a portion of burrs that cannot be removed because the continuous stamping die is designed such that the product is connected to the carrier by the connecting edge and is cut off from the carrier after all stamping operations are completed. After cutting, the product in a free state without the carrier positioning can not be accurately positioned in the die, and the burrs on the edges of the belt material finally connected with the carrier on the product can not be removed by a method of pressing the burrs. Since the burrs on the edges of the strip that are finally connected to the carrier cannot be removed by means of the burrs, it is only necessary to ensure that no burrs are produced during the final cutting.

In view of this, the utility model provides a new continuous stamping die.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a continuous stamping die for the free state product that comes out in this continuous stamping die does not take blanking deckle edge completely.

The utility model discloses a following technical scheme realizes:

the utility model provides a continuous stamping die, continuous stamping die includes the template and installs the edge of a knife of the product is cut off at last to the punching locating hole edge of a knife, blanking edge of a knife, the pressure deckle edge part in the template, the pressure deckle edge part sets up the back of blanking edge of a knife, continuous stamping die is still including beating the recess part, beat the recess part and set up the punching locating hole edge of a knife with the front of blanking edge of a knife, beat the recess part and beat the recess on metal material.

Further, the cross section of the groove is trapezoidal.

Further, the groove is provided with a functional surface, and the functional surface is intersected with a cutting surface which is formed by cutting the product by a knife edge of the final cut product and is left on the product.

Furthermore, the intersecting line of the functional surface and the cutting surface is relatively close to the groove bottom of the groove.

Furthermore, the included angle between the functional surface and the vertical direction is 10-20 degrees.

Further, the recess still has the reinforcement face, the contained angle of reinforcement face and vertical direction is greater than the contained angle of functional surface and vertical direction.

Further, the included angle between the reinforcing surface and the vertical direction is 45 degrees.

Further, the continuous stamping die further comprises a groove shaping part, and the groove shaping part is embedded and installed inside the deburring part.

Furthermore, the functional part of the groove shaping part corresponds to the groove punched on the metal material by the groove punching part.

Furthermore, the two grooving parts can be inserted and combined to form a new grooving part.

Compared with the prior art, the beneficial effects of the utility model are that:

the design is a groove part, the cross section of the working part of the groove part is approximately trapezoidal, when metal materials are punched and produced, the working part of the groove part can be punched into the metal materials to a certain depth, one section or a plurality of sections of the groove with the cross section similar to the trapezoidal cross section are left on the metal materials, when the metal materials are punched and processed, the generation position of cracks can be transferred to a functional surface before the metal materials are disconnected, and burrs higher than the plane of the product materials cannot be generated after the products are cut off and separated.

Drawings

FIG. 1 is a schematic view showing the positions of the grooves and the cutting edges of the male and female dies on the metal material of the present invention;

FIG. 2 is a schematic structural view of a groove forming part in a situation where the last joining edge of the present invention is short;

FIG. 3 is a side view of the grooved part of FIG. 2;

FIG. 4 is a schematic structural view of a groove forming part in a situation where the last connecting material edge of the present invention is long;

FIG. 5 is a side view of the debossed part of FIG. 4;

fig. 6 is a schematic structural view of a continuous stamping die according to the present invention;

fig. 7 is a comprehensive schematic view of the positional arrangement of the respective parts on the continuous press mold shown in fig. 6.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and embodiments.

As shown in fig. 1, in the punching and blanking process, theoretically, as long as the blanking gap is reasonable, absolute R0 is achieved for the cutting edges of the male die C and the female die D, cracks are generated from the sharp corners of the cutting edges of the male die C and the female die D in the blanking process, and burrs higher than the material plane are not generated on the edges of the cut and separated material sections. However, in practice, the cutting edges of the male die C and the female die D cannot be absolutely R0, and a small round angle is required. Cracks in the material section can occur on the side of the cutting edge not far from the rounded corner, so that after the cutting separation, burrs higher than the plane of the material can be generated on the edges of the material section. Especially along with the increase of blanking number of times, the blade can wear and tear the passivation gradually, and the blade fillet also can crescent, and the crack production position also removes to the more distant place of blade side thereupon, and deckle edge just also can be bigger and bigger. Through the analysis, the generation of the rough edges on the metal stamping product E is greatly related to the generation position of cracks in the blanking process.

Referring to fig. 2 to 5, a groove-forming component G is designed, the cross section of the working part of which is roughly trapezoidal, and when a metal material is produced by stamping, the working part of the groove-forming component G can be formed into the metal material to a certain depth, one or more sections of grooves H with approximately trapezoidal cross sections are left on the metal material, the grooves H are provided with two inclined surfaces, and the inclined surfaces which are cut off and left on one side of a product E and play a key role are called as functional surfaces M; the auxiliary slope left on the scrap F side after cutting is called a reinforcing surface N. This part G of digging groove is designed to be installed on continuous stamping die's suitable position for should dig groove part G during operation on this position, the functional surface M of hitting recess H on the metal material just can be crossed with the cut surface that stays on product E after product E is cut off at last, the intersection line position of functional surface M and cut surface will be close to the tank bottom of recess H relatively, like this, the die D blade of product E side just can not direct contact to the product material surface of next-door neighbour's recess H, thereby avoid making the functional surface M of recess H form an oblique cantilever. Because the functional surface M of the groove H is intersected with the lower surface of the metal material, a supporting line is formed, when the cutting edge of the convex die C applies blanking force to the metal material, a moment is generated in the metal material separation area, and the functional surface M of the groove H on the metal material is pushed towards the cutting edge of the concave die D. However, before the functional surface M of the groove H is pushed to the cutting edge of the die D, since the functional surface M of the groove H is hardened by the work, the plasticity is reduced, and cracks are generated under a large punching force, and the crack generating position is located on the functional surface M of the groove H. When the product E is cut and separated from the metal material, burrs are left on the functional surface M of the groove H and do not exceed the plane of the material of the product E, and no burrs are generated macroscopically. In order to enable products coming out of the continuous stamping die to be free of blanking burrs completely, the scheme is designed, and the problem can be effectively solved as long as the groove punching part G is designed and additionally installed in the continuous stamping die.

Of course, it is not necessary to design a grooving part G at will, and as long as the cross section of the working part is of a trapezoidal structure, grooving H at the cut part of the material will certainly achieve the above-mentioned effect. As shown in fig. 1, when the included angle a between the functional surface of the trapezoidal groove H and the vertical direction is too large, the support line formed by the intersection of the functional surface M of the groove H and the lower surface of the metal material is far from the cutting edge of the punch C. During blanking, the moment generated in the metal material separation area is larger, the functional surface M of the groove H is easily pushed to the cutting edge of the female die D, the metal material cracks just like the groove H, and the product E is separated from the metal material and then obvious burrs are left on the surface of the product E. Of course, the smaller the included angle a between the functional surface M of the trapezoidal groove H and the vertical direction, the better the effect. The smaller the angle a, the earlier cracks will develop on the functional surface M of the groove H and the lower the probability of burrs remaining on the surface of the product E, which is indeed true in theory. However, along with the reduction of the included angle a, the strength of the working part of the grooving part G is reduced, the trapezoidal structure is more prone to collapse and damage in the process of pressing the grooving part G into the metal material, the production efficiency of the product is reduced if the grooving part G is frequently replaced, more defective products can be produced, raw materials are wasted, and the cost is increased. Therefore, the included angle a between the functional surface M of the trapezoidal groove H and the vertical direction has a certain reasonable interval. As shown in fig. 3, theoretical deduction and multiple debugging verification show that the reasonable interval of the included angle a between the functional surface M of the trapezoidal groove H and the vertical direction is 10 ° to 20 °, and the adjustment can be selected according to different raw material characteristics, raw material thickness, shape of the last knife edge, and other factors, in this embodiment, the included angle a between the functional surface M of the trapezoidal groove H and the vertical direction is preferably 20 °. As for the reinforcing surface N of the trapezoidal groove H, since it only plays a role of reinforcing the strength of the working part of the grooving part G, the included angle β between the reinforcing surface N of the trapezoidal groove H and the vertical direction can be appropriately set larger, and preferably, the included angle β between the reinforcing surface N of the trapezoidal groove H and the vertical direction is 45 °. In detail, the edges and corners of the trapezoidal structure are subjected to rounding treatment so as to reduce the abrasion and prolong the service life of the trapezoidal structure.

As described above, in the case where the final edge of the product E is short, there is no problem at all. However, when the last material connecting edge of the product E is long, due to the existence of the surface work hardening phenomenon of the trapezoidal groove H and the influence of the processing errors of the blanking male die C and the female die D and the precision of the die, after the product E is cut off, a metal wire which is as long as the material connecting edge is sometimes left on the cut surface, and even falls on the product E to cause the product crush damage. Therefore, the generation of metal wires is a serious quality defect and must be completely avoided. In this case, as shown in fig. 4 and 5, the grooving part G is designed to have a split structure, that is, the grooving part G is formed by inserting and combining a part a and a part B. Wherein the height of the trapezoid structure on the part a is slightly higher than that of the trapezoid structure on the part B, and in this embodiment, the height difference between the part a and the part B is preferably 0.05 mm. After the part A and the part B are combined in an inserting mode, a segmented trapezoidal working part with alternate heights is formed on the grooving part G after the part A and the part B are combined in an inserting mode, and the length of each segment is about 1 mm. When the metal material sealing device works, the grooves H punched in the metal material are also grooves with alternate depths in one section. Since such a groove H structure does not have a complete long functional surface M, just like hitting a short connecting edge, no long wires are produced after the product E is cut off and separated, and no burrs are left on the product E.

In most cases, in order not to affect the final blanking size of the product E, the notching piece G is usually placed before the blanking station of the die. Although the design can ensure the blanking size of the product E, after the middle blanking station works, the punched port of the section of the groove H can be punched and deformed, and after the product E is cut off by the last knife, burrs higher than the material plane are left at two ends of the material connecting edge. Aiming at the situation, a groove shaping station is designed at a proper position of the punched and cut groove H, a groove shaping part is arranged in the groove shaping station, and the deformed shape of the port of the groove H is completely pressed by the groove shaping part. After the action processing, burrs higher than the plane of the material are not left at two ends of the material connecting edge after the product E is cut off. In order to ensure that the groove shaping part only plays a shaping role and does not bear larger metal material reaction force any more, the height of the working part on the groove shaping part is designed to be slightly lower than that of the working part G on the front groove shaping part.

In combination with the above theoretical description, the specific embodiments of the present invention are as follows:

as shown in fig. 6 and 7, a continuous press die includes a die plate 1, groove forming parts 2, 3, 4, burr forming parts 5, 9, 10, groove shaping parts 6, 7, 8, positioning hole punching blades 11, 12, punching blades 13, 14, 15, 16, 17, and a blade 18 for cutting off a product. The notching parts 2, 3 and 4 are respectively arranged in the template 1 and are arranged on a station at the front section of the template 1, and a knife edge 18 for cutting off a product is arranged on a station at the rear section of the template 1. The functional surface of the trapezoidal groove punched on the metal material 19 by the notching element 2, 3, 4 is just intersected with the cutting surface left on the product by the knife edge 18 of the final cut product. The punching hole knife edges 11 and 12 and the blanking knife edges 13, 14, 15, 16 and 17 are arranged in the template 1 in a reasonable distribution mode, and the punching hole knife edges 11 and 12 punch positioning holes in the metal material 19. In order to ensure the final blanking size of the product, the notching parts 2, 3 and 4 are arranged in front of the blanking knife edges 13, 14, 15, 16 and 17 and the punching hole knife edges 11 and 12, so that the material expansion phenomenon generated by notching is counteracted by the blanking process of a later station, and the final blanking size of the product is not influenced. The deburring parts 5, 9 and 10 are also installed in the template 1 and are arranged on proper stations behind the corresponding blanking blades 13, 14, 15, 16 and 17, and the deburring parts 5, 9 and 10 can accurately deburr the product outline punched edges, so that burrs generated on the punched edges of the blanked product outline are removed. However, these trim parts 5, 9, 10 remove only a significant portion of the trim from the product, and the trim from the final cut edge 18 is not removed. The provision of the fluted parts 2, 3, 4 solves this problem.

However, the arrangement of the processes still has some disadvantages, that is, through the punching of the punching blades 13, 14, 15, 16, 17, the trapezoidal groove punched on the metal material will be dragged and deformed at the port on the cutting edge, and after the final product cutting blade 18 is punched and cut, a sharp burr will be left on the product corresponding to the deformed part of the groove, which also cannot meet the requirement of the product appearance quality. In view of the above problem, the groove shaping parts 6, 7, 8 are designed, the groove shaping parts 6, 7, 8 are embedded and installed inside the deburring part 5, and the functional parts of the groove shaping parts 6, 7, 8 correspond to the trapezoidal grooves punched on the metal material 19 by the groove punching parts 2, 3, 4 one by one. Like this, when the product deckle edge was suppressed to fringing part 5, recess plastic part 6, 7, 8 also can carry out the secondary roof pressure to the trapezoidal recess that drags the deformation when the port department on the cut edge is blanked, guarantee that these recesses run through penetrating. By shaping, the through groove is not left with any burr after being cut by the knife edge 18 of the final cut product. Certainly, the groove reshaping parts 6, 7 and 8 only perform secondary jacking on the deformation area at the edge of the groove, so that the functional part of the groove reshaping part 6 corresponding to the longer groove does not need to be made into an integral full-length structure, and only a segmented structure which can be jacked to the deformation area at the port of the groove and can ensure that the groove reshaping part has certain strength can be designed. In addition, the groove-reshaping elements 6, 7, 8 do not exert any additional impact on the trapezoidal grooves, so that the functional section of the groove-reshaping elements 6, 7, 8 can be slightly lower than the functional section of the preceding grooved element 2, 3, 4 (as shown in fig. 2 and 3). In this way, the groove-shaping parts 6, 7, 8 are placed behind the product profile blanking station without adversely affecting the final blanking size of the product.

In this embodiment, one product has a longer final cut edge. Because there is work hardening phenomenon on trapezoidal recess H surface, in addition the influence of blanking terrace die C, die D machining error and mould precision, finally cut off the back, can produce some longer wires sometimes and stay on the mould surface, even by being pressed on product E, this can seriously influence product outward appearance and product function. For the defects, the grooving part G aiming at the longer final cut edge is designed into a split structure, as shown in fig. 4 and fig. 5, the grooving part A and the grooving part B are combined together in an inserting mode, so that the functional part of the grooving part G after the penetrating and combining is divided into a plurality of small sections, a certain height difference exists between every two adjacent small sections, and the height difference is preferably 0.05 mm. The trapezoidal grooves H punched on the metal material are grooves with alternate depth of a section of the groove. Because each segment of the separated groove is shorter, the structure of the groove H does not have a complete long functional surface M, just like being punched on a short connecting material edge, and after the product E is finally cut, even if metal wires are generated, the metal wires only have short scraps, and the product quality cannot be greatly influenced.

The utility model discloses in, design one kind and beat groove part G, its working part cross-section roughly is trapezoidal, when carrying out punching press production to metal material, this working part of beating groove part G can beat the inside certain degree of depth of metal material, leave one section or multistage cross-section and approximate trapezoidal recess H on metal material, when carrying out blanking processing to metal material, can be before the metal material disconnection, shift to functional surface M the production position of crackle on, product E is being cut off the separation back, just can not produce the deckle edge that exceeds product E material plane.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. The utility model provides a continuous stamping die, its characterized in that, continuous stamping die includes the template and installs the edge of a knife of the product is cut off to die locating hole edge of a knife, blanking edge of a knife, deburring part and final in the template, deburring part sets up the back of blanking edge of a knife, continuous stamping die is still including beating the recess part, beat the recess part setting and be in the die locating hole edge of a knife with the front of blanking edge of a knife, beat the recess part and beat the recess on metal material.

2. The progressive stamping die of claim 1, wherein the grooves are trapezoidal in cross-section.

3. The continuous stamping die of claim 2, wherein the recess has a functional face that intersects a cut face of the final cut product left on the product by knife-edge cutting.

4. The continuous stamping die of claim 3, wherein the intersection of the functional surface and the cut surface is relatively close to the bottom of the groove.

5. The continuous stamping die of claim 3, wherein the functional face is angled from the vertical in an interval of 10 ° to 20 °.

6. The continuous stamping die of claim 3, wherein the groove further has a reinforcing surface, and an included angle between the reinforcing surface and the vertical direction is larger than an included angle between the functional surface and the vertical direction.

7. The continuous extrusion die of claim 6, wherein the angle between the reinforcing face and the vertical is 45 °.

8. The progressive stamping die of claim 1, further comprising a groove-shaping component insert-mounted within the flash component.

9. The progressive stamping die of claim 8, wherein the functional portion of the groove shaping component corresponds to a groove imparted to the metal material by the debossing component.

10. The progressive stamping die of claim 1, wherein two of the grooved elements are interlineably combinable to form a new grooved element.

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