CN109940084A - A stamping and trimming die structure - Google Patents

Abstract

A stamping and trimming die structure, comprising a first trimming die for an upper die, a piercing knife for an upper die, a second trimming die for an upper die, a scrap knife for a lower die and a trimming die for the lower die; the piercing knife for the upper die can be disassembled and replaced , the upper mold piercing knife is installed in the first trimming mold of the upper mold during operation, the lower mold scrap knife is lower than the lower mold trimming mold, and the lower mold scrap knife and the lower mold trimming mold are spaced apart. The invention adopts a stamping and trimming die structure that can replace the puncture knife, which is not only conducive to the daily maintenance and maintenance of the puncture knife edge, but also can independently select the material and heat treatment process of the puncture knife. As a similar standard part, the puncture knife is applied to different molds for standardized management, which can reduce the processing and manufacturing cost. In addition, the trimming die structure solves the problem of generating scrap at the scrap knife position during the production process.

Description

A stamping and trimming die structure

technical field

The invention relates to the field of stamping, in particular to a stamping and trimming die structure with a piercing knife, in particular to a stamping and trimming die structure with a piercing knife that can be replaced.

Background technique

In the stamping production process of automobile outer cover parts, the trimming process is prone to generate scraps, which affects the surface quality of the cover parts and causes the production to stop. The location of waste chips is mainly concentrated in the position where there are scrap knives. The main reason is that the scrap cutting mechanism is unreasonable, so that the upper mold trimming mold, the lower mold trimming mold, and the lower mold scrap knife are first removed during the trimming process. The sheet is torn and subjected to secondary shearing, resulting in scrap.

In order to optimize the scrap cutting mechanism, a pointed protrusion, that is, a piercing knife, is currently set at the matching position of the upper die trimming die, the lower die trimming die, and the lower die scrap knife, as shown in Figure 1, so that the trimming process sheet is first It is punctured instead of torn, eliminating secondary shearing of the sheet and solving the problem of scrap scraps at the scrap knife position.

The piercing knife mentioned in the above-mentioned patent is integrated with the upper mold trimming die, which has the following shortcomings: First, when the edge of the piercing knife is repaired, the entire upper mold trimming mold needs to be removed; The trimming tool material is the same.

SUMMARY OF THE INVENTION

The purpose of the present invention is to eliminate the problem of waste chips caused by secondary shearing, and at the same time propose a removable piercing knife structure, which is beneficial to the maintenance and cost control of subsequent molds.

A stamping and trimming die structure includes a first trimming die for an upper die, a piercing knife for the upper die, a second trimming die for the upper die, a waste knife for the lower die and a trimming die for the lower die; Disassembly and replacement, the upper die piercing knife is installed in the first trimming die of the upper die during operation, the lower die scrap knife is lower than the lower die trimming die, and the lower die scrap knife is the same as the lower die trimming die. The lower die trimming die has spacing.

The upper die piercing knife is connected to the first trimming die of the upper die through bolts and keys.

The angle of the tip of the upper mold piercing knife and the mating surface of the lower mold scrap knife is α, and the value range of the α is 60°-80°.

The angle of the tip of the upper mold piercing knife and the mating surface of the lower mold trimming mold is β, and the value range of the β is 60°-80°.

The height of the upper die piercing knife is h, and the value range of h is 2mm-6mm.

The lower die scrap knife and the lower die trimming die are provided with a gap a in the vertical direction, and the value range of the a is 3mm-8mm.

The lower die scrap knife and the lower die trimming die are provided with a gap b in the horizontal direction, and the value range of the b is 3mm-8mm.

Beneficial effects of the present invention:

The invention adopts a stamping and trimming die structure that can replace the puncture knife, which is not only conducive to the daily maintenance and maintenance of the puncture knife edge, but also can independently select the material and heat treatment process of the puncture knife. As a similar standard part, the puncture knife is applied to different molds for standardized management, which can reduce the processing and manufacturing cost. In addition, the trimming die structure solves the problem of generating scrap at the scrap knife position during the production process.

Description of drawings

FIG. 1 is a schematic diagram of an integral structure of an upper die piercing knife and an upper die first trimming die in the prior art.

FIG. 2 is a schematic diagram of the split structure of the upper die piercing knife and the upper die trimming die in the present invention.

Figure 3 is a front view of the structure of the trimming die of the present invention.

FIG. 4 is an axial view of the structure of the trimming die of the present invention.

FIG. 5 is a schematic diagram of the piercing knife of the present invention.

Figure 6 is an axial view of the lower die trimming die and the lower die scrap cutter of the present invention.

FIG. 7 is a schematic view of the trimming die structure of the present invention in the trimming process.

Detailed ways

As shown in Fig. 2, Fig. 3 and Fig. 4, the present invention includes a first trimming die 1 of an upper die, a piercing knife 2 of an upper die, a second trimming die 3 of an upper die, a scrap knife 4 of the lower die and a trimming die of the lower die Mold 5, the upper mold piercing knife 2 can be disassembled and replaced, the upper mold piercing knife 2 is installed in the first trimming mold 1 of the upper mold when working, and the lower mold scrap knife 4 is lower than the The lower mold trimming mold 5 has a space between the lower mold scrap knife 4 and the lower mold trimming mold 5 .

The upper mold piercing knife 2 is an independent mold, which is connected to the first trimming mold 1 of the upper mold through bolts and keys. The upper die piercing knife 2 is an independent mold. On the one hand, it is conducive to the daily maintenance of the piercing knife edge. On the other hand, the material and heat treatment process of the piercing knife can also be selected independently. Like standard parts, they are applied to different molds for standardized management, which can reduce processing and manufacturing costs.

As shown in FIG. 5 , the angle of the cutting edge of the mating surface of the upper die piercing knife 2 and the lower die scrap knife 4 is α, and the value range of α is 60°-80°. The angle of the cutting edge of the mating surface of the upper mold piercing knife 2 and the lower mold trimming mold 5 is β, and the value range of the β is 60°-80°. The height of the upper die piercing knife 2 is h, and the value range of h is 2mm-6mm.

As shown in FIG. 3 , the lower die scrap knife 4 and the lower die trimming die 5 are provided with a gap a in the vertical direction, and the value range of a is 3mm-8mm.

As shown in FIG. 6 , the lower die scrap knife 4 and the lower die trimming die 5 are provided with a gap b in the horizontal direction, and the value range of b is 3mm-8mm.

As shown in Figure 7, when working, the upper die piercing knife 2 first contacts and pierces the sheet material 6 instead of tearing the sheet material 6; 3 and the upper mold piercing knife 2 continue to move downward, the first trimming mold 2 of the upper mold, the second trimming mold 3 of the upper mold and the trimming mold 5 of the lower mold cooperate to complete the separation of the part and the waste, and the upper mold is the first trimming mold. The trimming die 1 cooperates with the lower die scrap knife to complete the cutting of the scrap.

The detachable piercing knife punching and trimming die structure enables the sheet material to be pierced first rather than torn during the trimming process, eliminates the secondary shearing of the sheet material, and solves the problem of generating scrap at the position of the scrap knife.

Claims (3)

1. a kind of punching press Trimming Die structure, it is characterised in that: including the first Trimming Die of upper mold (1), upper mold puncturing blade (2), The second Trimming Die of upper mold (3), lower die waste knife (4) and lower die Trimming Die (5), the upper mold puncturing blade (2) are detachable more It changes, the upper mold puncturing blade (2) is mounted in the first Trimming Die of upper mold (1), and lower die waste knife (4) is lower than lower die Trimming Die (5), lower die waste knife (4) and lower die Trimming Die (5) have spacing.

2. a kind of punching press Trimming Die structure according to claim 1, it is characterised in that: the upper mold puncturing blade (2) is Individual die by bolt and is keyed on the first Trimming Die of upper mold (1).

3. a kind of punching press Trimming Die structure according to claim 1, it is characterised in that: the upper mold puncturing blade (2) with The point of a knife angle of lower die waste knife (4) mating surface is α, and the value range of the α is 60 ° -80 °；Upper mold puncturing blade (2) and lower die The point of a knife angle of Trimming Die (5) mating surface is β, and the value range of the β is 60 ° -80 °；The height of upper mold puncturing blade (2) is The value range of h, h are 2mm-6mm；

The lower die waste knife (4) and lower die Trimming Die (5) are equipped with gap a in vertical direction, and the value range of a is 3mm- 8mm；

The lower die waste knife (4) and lower die Trimming Die (5) are equipped with gap b in the horizontal direction, and the value range of b is 3mm- 8mm。