CN100427239C - A composite cold stamping die - Google Patents

Abstract

A composite cold stamping die, including two parts, an upper die and a lower die. Two screws 7, pins 8, convex and concave dies 9, unloading plate 10, ejector block 23, first spring 25, second spring 26, ejector 27, guide sleeve 28, third spring 29, and the lower die is composed of Die 11, top plate 12, third screw 13, positioning pin 14, lower die holder 15, fixed plate 16, limit screw 17, punch 18, supporting rod 19, top piece spring 20, bending punch 21, second The guide post 22 and the stopper pin 24 are composed of the convex and concave die 9 and the first guide post 6 respectively installed under the upper die base 1, the ejector block 22 and the ejector 27 are installed in the convex and concave die 9, and the guide sleeve 28 is directly installed Under the upper die base 1; the second guide post 13 is directly installed on the lower die base 15, the die 11 is directly installed on the lower die base 15, the punch 18 and the bending punch 21 are installed in the die 11, and the lower die passes through the first Two guide pillars 22 and guide sleeve 28 are clamped with the upper mold.

Description

A composite cold stamping die

technical field

The invention relates to a compound cold stamping die, in particular to a composite die structure of multiple cold stamping processes.

Background technique

At present, there are three basic process schemes for forming U-shaped bending parts with holes on the bottom surface:

(1) Single process forming of blanking, bending and punching;

(2) Blanking, punching and compounding, and then bending and forming in a single process;

(3) Forming in a single process of blanking, followed by bending and punching composite forming.

Scheme (1) has a simple mold structure and requires 3 sets of molds, and the efficiency and precision are relatively low; schemes (2) and (3) have a slightly more complicated structure, requiring 2 sets of molds, and both efficiency and precision are improved. But these three schemes are far from meeting the requirements of modern production with high precision, low cost and high benefit.

Contents of the invention

The purpose of the present invention is to provide a mold structure that can better meet the requirements of modern production with high precision, low cost and high benefit.

The present invention is a compound cold stamping die structure, including upper die and lower die. 7. Pin 8, convex and concave mold 9, unloading plate 10, ejector block 23, spring 25, spring 26, ejector 27, guide sleeve 28, spring 29, wherein convex and concave mold 9 and guide post 6 are respectively installed on Under the upper die base 1, the ejector block 23 and the ejector 27 are installed in the convex and concave dies 9, and the guide sleeve 28 is directly installed under the upper die base 1.

The lower mold is composed of a die 11, a top plate 12, a screw 13, a positioning pin 14, a lower mold base 15, a fixed plate 16, a limit screw 17, a punch 18, a support rod 19, a top piece spring 20, a bending punch 21, Guide post 22, stopper pin 24 is formed, and wherein guide post 22 is directly installed on the lower mold base 15, die 11 is directly installed on the lower die base 15, punch 18 and bending punch 21 are installed in die 11 li. The lower mold is matched with the upper mold through the guide pillar 22 and the guide sleeve 28 .

Benefits of the invention

For the forming process scheme of U-shaped bending parts with holes at the bottom, blanking, bending and punching can be compositely formed. This scheme only needs one pair of molds. The mold structure is not complicated, and the precision and efficiency are high. Therefore, its core technology It is to design the blanking, bending and punching composite mold structure, that is, to decompose the blanking into tongue cutting and cutting, and to design the tongue cutting, bending, punching and cutting composite mold.

Description of drawings

Fig. 1 is the mold structural diagram of the embodiment of the present invention, and reference numeral and corresponding name are:

Upper mold base 1, discharge screw 2, backing plate 3, mold handle 4, screw 5, guide post 6, screw 7, pin 8, punch and die 9, discharge plate 10, die 11, top plate 12, screw 13, Locating pin 14, lower die holder 15, fixed plate 16, limit screw 17, punch 18, supporting rod 19, spring 20, bending punch 21, guide post 22, ejector block 23, stopper pin 24, spring 25 , Spring 26, ejector 27, guide sleeve 28, spring 29.

Detailed ways

As shown in Figure 1, the composite cold stamping die of the present invention includes two parts, an upper die and a lower die. The upper mold is composed of the upper mold base 1, the mold handle 4 directly installed on the upper center of the upper mold base 1 through the positioning hole and the first screw 5, and respectively installed on the upper mold base through the positioning hole, the backing plate 3, the screw 7 and the pin 8 The guide sleeve 28, the guide post 6, the punch and die 9, the spring 25, the spring 26, the ejector 27 and the ejector block 23 installed in the punch and die 9, are installed on the The upper mold base 1 is composed of a stripping plate 10 around the lower convex and concave mold 9; The lower mold is composed of the lower mold base 15, the guide post 22 directly installed on the lower mold base 15 through the positioning hole, the die 11 installed in the center of the lower mold base 15 through the screw 13 and the positioning pin 14, and the stopper screw 17. The bending punch 21 in the die 11, the fixed plate 16 and the punch 18 installed in the die 11 by the positioning hole and the pressure shoulder, the spring 20 and the top plate 12 installed between the die 11 and the bending punch 21, The stopper pin 24 that is directly installed on the die 11, the support rod 19 that is installed in the lower mold base 15 are formed, and the bending punch 21 is movable. The upper mold is clamped with the lower mold through the guide sleeve 28 and the guide post 22 .

The slide block (not shown in the figure) of the press drives the upper mold composed of reference numbers 1-10, 23, 25-29 in Fig. 1 to move downward, and the unloading plate 10, the ejector 27 and the ejector block 23 First touch the upper surface of the blank placed on the die 11 and the bending punch 21 to press it tightly, and the upper die continues to move downward, that is, the punch and die 9 move down about 1.5 material thickness, and the tongue cutting is completed; the punch and die 9 continue to descend From the beginning of bending to the completion of bending, that is, the lower surface of the backing plate 3 contacts the upper surface of the ejector 27. Before that, the force acting on the bending punch 21 by the limit screw 17 and the support rod 19 is greater than that of the spring 25 and the spring 26 through the ejector. The force of the ejector 27 and the blank acting on the bending punch 21, so the bending punch 21 does not move; the upper mold continues to go down, because the lower surface of the backing plate 3 is in rigid contact with the upper surface of the ejector 27, and the supporting rod 19 The active force is elastic force, so that the ejector 27 and the bending punch 21 move downwards simultaneously to the lower surface of the bending punch 21 and the upper surface of the fixed plate 16 to complete cutting and punching. When the slide block of the press machine reaches the bottom dead point, the press drives the upper die back, mainly through the unloading spring 29, the unloading plate 10, the spring 25 and the ejector block 23 to complete the unloading of waste and blanks, and through the top piece spring 20 and the top plate 12, spring 26 and ejector 27 complete the ejection of workpiece.

Claims (1)

1. A composite cold stamping die, including two parts, an upper mold and a lower mold. The upper mold is composed of an upper mold base (1), a discharge screw (2), a backing plate (3), a mold handle (4), a first Screw (5), first guide post (6), second screw (7), pin (8), punch and die (9), stripper plate (10), ejector block (23), first spring (25 ), the second spring (26), ejector (27), guide sleeve (28), the third spring (29), the lower mold is composed of die (11), top plate (12), the third screw (13 ), positioning pin (14), lower mold base (15), fixed plate (16), limit screw (17), punch (18), support rod (19), top piece spring (20), bending punch (21), the second guide post (22), and the stopper pin (24), are characterized in that the punch and die (9) are installed under the upper die base (1) by the second screw (7) and pin (8), The ejector (27) is installed in the convex and concave die (9), the ejector block (23), the first spring (25) and the second spring (26) are installed in the ejector (27), the first guide post ( 6) Installed in the punch and die (9) and the ejector (27) through the backing plate (3), the first guide post (6) guides the ejector (27) which doubles as the cutting punch and the punching die; The die (11) is directly installed on the center of the lower die holder (15) through the third screw (13) and the positioning pin (14), the fixing plate (16) is installed in the die (11), and the punch (18) passes through The fixed plate (16) is installed in the die (11), the bending punch (21) is installed in the die (11) through the punch (18) and the limit screw (17), and the supporting rod (19) is installed in the lower die In the seat (15) and the fixed plate (16), the bending punch (21) can move relative to the die (11) and the lower die seat (15).

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