CN102728719A - Composite cold punching die - Google Patents

Abstract

The invention discloses a compound cold stamping die, which comprises an upper die and a lower die, the guide post of the lower die is covered with a guide sleeve of the upper die; the upper die is provided with a bottom hole punch, and the bottom hole punch The outer jacket has a drawing die and an upper convex die; the lower die is also provided with a lower convex die, a trimming punch and a blanking die corresponding to the bottom hole punch, the drawing die and the upper convex die. Through the above method, the present invention can compound blanking, deep drawing, punching, and trimming at one time, so that only one pair of molds is needed, and blanking and deep drawing are completed before punching and trimming, and the compounding of the four processes is smoothly realized , which meets the requirements of modern production with high precision, low cost and high benefit.

Description

A compound cold die

technical field

The invention relates to the field of mold manufacturing, in particular to a compound cold stamping die.

Background technique

At present, the basic stamping process for forming a deep-drawing part with a small hole at the bottom and a flange is: blanking, deep drawing, punching, and edge trimming. Specifically, there are the following four forming process schemes:

(1) Single process forming of blanking, deep drawing, punching and edge trimming;

(2) Blanking and punching are compounded first, and then deep drawing and edge trimming are formed in a single process;

(3) Blanking and deep drawing are compounded first, and then the bottom hole is punched and the trimming is compounded.

(4) Blanking, deep drawing, and punching holes are compounded first, and then trimmed to form;

Through analysis, scheme (1) has a simple mold structure, but requires 4 sets of molds, which is very inefficient and cannot produce high-precision stamping parts; schemes (2), (3), and (4) have slightly more complicated structures and require 2 The efficiency and accuracy of molds above the pair are greatly improved. These four schemes are far from meeting the requirements of modern production with high precision, low cost and high benefit.

Contents of the invention

The technical problem mainly solved by the present invention is to provide a composite cold stamping die, which can make blanking, deep drawing, punching, and edge trimming compound at one time, so that only one pair of molds is needed, and blanking, deep drawing are before punching and edge trimming Completed, the compounding of the four processes was successfully realized, which met the requirements of modern production with high precision, low cost and high benefit.

In order to solve the above-mentioned technical problems, a technical solution adopted in the present invention is: provide a kind of composite cold punching die, this composite cold punching die comprises upper die and lower die, the guide bush of upper die is covered with on the guide post of described lower die; The description also includes that the upper mold is provided with a bottom hole punch, and the bottom hole punch is covered with a drawing die and an upper convex die; Edge punch and blanking die.

Preferably, the upper die also includes an upper die base, an upper backing plate, an upper punch fixing plate, an upper punch and die fixing plate, a rubber pad, a stripping plate, a deep drawing die, a limit block, a connecting push rod, The push plate and the pusher plate, the upper backing plate, the upper punch fixing plate, the upper punch and die fixing plate, the rubber pad and the discharge plate are sequentially superimposed and fixed on the lower plane of the upper die base; the upper punch and die fixing plate The upper convex and concave die is fixed, the upper convex and concave die is embedded with a deep drawing die, and a limit block is arranged in the deep drawing die; the bottom hole punch is fixed on the upper punch fixed plate, and the bottom hole punch passes through the upper convex and concave die fixed plate in turn , a limit block and a pusher plate; the description also includes a push plate between the upper backing plate and the upper die base, the lower plane of the push plate is in contact with the upper end of the connecting push rod, and the connecting push rod passes through the upper backing plate, the upper convex The mold fixing plate, the upper convex and concave mold fixing plate and the limit block are pressed against the pusher plate.

Preferably, the lower mold also includes a lower mold base, a lower backing plate, a lower punch and die fixing plate, a blanking die and a top plate, and the lower backing plate, the lower punch and die fixing plate and the blanking die are sequentially Superimposed and fixed on the upper plane of the lower die base, a lower convex die is arranged in the middle of the blanking die, a trimming punch is over the lower convex die, and a top plate is arranged between the trimming punch and the blanking die.

The beneficial effects of the present invention are: a compound cold stamping die of the present invention can make blanking, deep drawing, punching and edge trimming combined at one time, so that only one pair of molds is needed, and blanking and deep drawing are before punching and edge trimming Completed, the compounding of the four processes was successfully realized, which met the requirements of modern production with high precision, low cost and high benefit.

Description of drawings

Fig. 1 is a schematic structural view of a preferred embodiment of a compound cold stamping die of the present invention.

Detailed ways

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

Please refer to Fig. 1, the embodiment of the present invention comprises:

A composite cold stamping die, which comprises an upper die 6 and a lower die 19, the guide post 9 of the lower die 19 is covered with the guide sleeve 8 of the upper die 6; the upper die 6 is also provided with a bottom hole punch 39, the bottom hole punch 39 is covered with an upper punch and die 32; the lower die 19 is also provided with a lower punch and die 21 corresponding to the bottom hole punch 39, the drawing die 33 and the upper punch and die 32, the trimming punch 17 and the drop Material die 12.

The upper mold 6 also includes an upper mold base 10, an upper backing plate 35, an upper punch fixed plate 34, an upper convex and concave mold fixed plate 31, a rubber pad 29, a stripping plate 11, a deep drawing die 33, and a limit block 37 , connecting the push rod 38, the push plate 3 and the push piece plate 15, the upper backing plate 35, the upper punch fixing plate 34, the upper punch and die fixing plate 31, the rubber pad 29 and the unloading plate 11 are superimposed in sequence and fixed on the upper The lower plane of the mold base 10; the upper convex and concave mold fixing plate 31 is fixed with an upper convex and concave mold 32, and the upper convex and concave mold 32 is embedded with a drawing die 33, and a limit block 37 is arranged in the drawing die 33; The bottom hole punch 39 is fixed on the punch fixing plate 34, and the bottom hole punch 39 passes through the upper punch and concave mold fixing plate 31, the limit block 37 and the pusher plate 15 successively; A push plate 3 is provided, the lower plane of the push plate 3 is in contact with the upper end of the connecting push rod 38, and the connecting push rod 38 passes through the upper backing plate 35, the upper punch fixing plate 34, the upper convex and concave die fixing plate 31 and the limit block 37 in turn. Butt against the pusher plate 15.

Described lower die 19 also comprises lower mold base 26, lower backing plate 13, following convex and concave mold fixing plate 14, blanking die 12 and top material plate 18, described lower backing plate 13, lower convex and concave mold fixing plate 14 and drop The material die 12 is superimposed and fixed on the upper plane of the lower die base 26 in sequence, the blanking die 12 is provided with a lower convex die 21, and the lower convex die 21 is covered with a trimming punch 17, a trimming punch 17 and a blanking die Top material plate 18 is provided between 12.

The working mode of a compound cold stamping die in the present invention is that the slider of the press drives the upper die to move downward, the unloading plate 11 first touches the processed blank placed on the blanking die 12, and the unloading rubber 29 is continuously compressed , the unloading plate 11 presses the blank, because the upper end surface of the punch and die is lower than the upper end surface of the blanking die 12 by about one material thickness, the upper mold goes down again, that is, the punch and die moves downward by about one material thickness, and blanking is completed; The upper die continues to move downwards to start deep drawing. During the deep drawing, the top plate 18 and the trimming punch 17 are used to press the edge. As the drawing progresses, when the upper die descends to the lower surface of the trimming punch 17 and touches When the backing plate 13 is on the upper surface, the trimming punch 17 and the drawing die 12 stop moving, and the drawing ends; the upper die drives the punch and die to continue down and start trimming, and at the same time, the bottom hole punch 39 touches the blank and starts punching. Until the upper and lower molds are completely closed, blanking, deep drawing, punching, and edge trimming are all completed; on the return journey, on the contrary, the press drives the upper mold to move upward, mainly through the unloading plate 11 and the top plate 18 to complete the unloading of waste and blanks. Material, complete top piece and push piece respectively by trimming punch 17 and push piece plate 15.

The composite cold stamping die of the present invention can combine blanking, deep drawing, punching and trimming at one time, so that only one pair of molds is needed, blanking and deep drawing are completed before punching and trimming, and the four processes are successfully realized The combination meets the requirements of modern production with high precision, low cost and high benefit.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (3)

1. a compound cold stamping die, is characterized in that: this compound cold stamping die comprises patrix and counterdie, and the guide bush of patrix is covered with on the guide post of described counterdie; Described also comprises that patrix is provided with bottom hole punch, The bottom hole punch is covered with a drawing die and an upper punch and die; the lower die is also provided with a lower punch and die corresponding to the bottom hole punch, the drawing die and the upper punch and die, a trimming punch and a blanking die. 2. A kind of composite cold stamping die according to claim 1, characterized in that: the upper die also includes an upper die base, an upper backing plate, an upper punch fixing plate, an upper convex and concave die fixing plate, a rubber pad, a discharge Plate, deep drawing die, limit block, connecting push rod, push plate and push piece plate, the upper backing plate, upper punch fixing plate, upper punch and die fixing plate, rubber pad and unloading plate are superimposed and fixed in sequence On the lower plane of the upper die base; the upper convex and concave die fixing plate is fixed with an upper convex and concave die, and the upper convex and concave die is embedded with a drawing die, and a limit block is arranged in the drawing die; the upper punch and die fixing plate The bottom hole punch is fixed, and the bottom hole punch passes through the upper convex and concave die fixing plate, the limit block and the discharge plate in turn; the above also includes a push plate between the upper backing plate and the upper die seat, and the lower plane of the push plate is connected to the push rod The upper end is in contact, and the connecting push rod passes through the upper backing plate, the upper punch fixing plate, the upper punch and die fixing plate and the limit block in turn, and then abuts against the push piece plate. 3. A kind of compound cold die according to claim 1, it is characterized in that: described lower mold also comprises lower mold base, lower backing plate, lower convex and concave die fixing plate, blanking die and ejector plate, described The lower backing plate, the lower convex and concave mold fixing plate and the blanking concave mold are successively superimposed and fixed on the upper plane of the lower mold base. The lower convex and concave mold is arranged in the middle of the blanking concave mold. A top plate is arranged between the blanking dies.

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