CN116213555A

CN116213555A - Local flexible structure of thin-wall complex deep-drawing stamping part male die

Info

Publication number: CN116213555A
Application number: CN202211592173.8A
Authority: CN
Inventors: 谈正光; 邹政耀
Original assignee: WUXI PENDE VEHICLE PARTS CO Ltd
Current assignee: WUXI PENDE VEHICLE PARTS CO Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-06-06

Abstract

The invention relates to a local flexible structure of a male die of a thin-wall complex deep-drawing stamping part, which has the function of stretching stamping materials locally in advance and avoiding the stretch cracking condition of the deep-drawing part; the mold is suitable for the partial structure of thin-wall complex deep-drawing stamping part molds, in particular for the partial structure of shell stamping part molds such as automobile muffler bags, half shells and the like; the concrete structure is composed of a partial window 18 of the male die 4, a deep drawing movable die block 6, a supporting block 8 and a spring 13.

Description

Local flexible structure of thin-wall complex deep-drawing stamping part male die

Technical Field

The invention relates to a local flexible structure of a male die of a thin-wall complex deep-drawing stamping part, which is characterized in that a die has the function of stretching stamping materials locally in advance and avoiding the occurrence of stretch cracking at a deep-drawing part, is suitable for the local structure of the die of the thin-wall complex deep-drawing stamping part, and is particularly suitable for the local structure of the die of shell stamping parts such as an automobile silencing bag, a half shell and the like.

Background

The requirements of the sedan on spare and accessory parts are very high, for example, the requirements of light weight enable shell parts such as sound damping bags, half shells and the like to have more reinforcing ribs, so that the requirements on rigidity and strength can be met when thinner stainless steel materials are adopted, but the requirements on the structure of a stamping die are complex, the stamping process is improved, the requirements on the surface smoothness enable the material flow rule of the stamping materials to be higher, and cracking, galling and local overlarge thinning cannot occur; the stamping part is a deep-drawing thin-wall part, has larger size, needs to spread a plastic film between a stamping material and an upper die and a lower die in advance in the stamping process, and then deep-drawing and stamping out a product meeting the requirements, but the consumption of the plastic film is quite remarkable every year, and the cost is increased; the plastic film is laid on the upper die and the lower die, which is labor-consuming and reduces the production efficiency; the deep drawing causes local excessive drawing so that the wall thickness is thinned, and the thickness of the punched material can only be properly thickened; and defects such as cracking, napping and the like are often generated, so that the qualification rate of products is reduced; in order to reduce the rejection rate and the defective rate of products, the local optimization is carried out on the die in the area where cracking, napping and local thinning are easy to occur, and the scheme is provided, namely, the local flexible structure of the male die of the thin-wall complex deep-drawing stamping part.

Disclosure of Invention

The invention aims to provide a local flexible structure of a male die of a thin-wall complex deep-drawing stamping part, aiming at the defects, and the local flexible structure has the function of stretching a stamping material locally in advance and avoiding the stretch cracking condition of a deep-drawing part; the concrete structure is composed of a local window of a male die, a deep drawing movable die block, a supporting block and a spring part.

In order to achieve the above purpose, the present invention adopts the following technical measures:

a local flexible structure of a male die of a thin-wall complex deep-drawing stamping part is characterized in that a flexible mechanism is locally designed, and a stamping material can be slightly stretched in advance to enable the local part to have more stamping material share, so that the deep-drawing part is prevented from being cracked; the structure is characterized by comprising a local window of a male die, a deep-drawing movable die block, a supporting block and a spring part; the part (2) is punched by a mould, the part (2) is provided with a local deep-drawing structure (3), the mould is provided with a male mould (4), the male mould (4) is provided with an integral deep-drawing mould structure (5), the integral deep-drawing mould structure (5) can cause cracking, roughening and local thinning of the local deep-drawing structure (3) to be overlarge during punching, a local flexible structure is designed, the male mould (4) is provided with a local window (18), the local window (18) is provided with a deep-drawing movable mould block (6), the deep-drawing movable mould block (6) is provided with a deep-drawing mould structure (5), two sides of the deep-drawing movable mould block (6) are provided with raised guide rails (9), the local window (18) is provided with guide grooves (11), the raised guide rails (9) are matched and are arranged in the guide grooves (11), gaps (7) are arranged between edges of the local window (18), the lower part of the local window (18) is fixedly provided with a supporting block (8), the supporting block (8) is provided with a second position of the deep-drawing movable mould block (6), the second position of the supporting block (8) is the second position of the deep-drawing movable mould (18) is the second position of the second position (18), a blind hole (10) is formed in the lower end face of the deep-drawing movable die block (6), a spiral compression spring (13) is mounted in the blind hole (10), the spiral compression spring (13) pushes up the deep-drawing movable die block (6) to eliminate the gap (7) after elastic force is applied, the deep-drawing movable die block (6) can be contacted with the drawing material (1) in advance during punching so that the drawing material (1) is locally stretched in advance, the deep-drawing movable die block (6) overcomes the elasticity of the spiral compression spring (13) after contacting the drawing material (1), until the deep-drawing movable die block (6) contacts the upper end face of the supporting block (8), the position of the deep-drawing movable die block (6) giving the part (2) a correct shape is achieved, two sides of the drawing movable die block (6) are provided with a lubricating grease groove (12), the depth of the lubricating grease groove (12) is 0.5-3 mm, the width of the deep-drawing movable die block (6) is equal to the lubricating grease groove (12 mm), the lubricating grease groove (12 mm) is different from the shape of the groove (12 mm, the lubricating grease groove (12 mm) is different from the lubricating grease groove (12 mm), the lubricating groove (12 mm is different from the main shape, install in blind hole (10) helical compression spring (13) and coil spring (15), helical compression spring (13) with the length of coil spring (15) is the same or one of them of difference, terminal surface 1 (14) of helical compression spring (13) with terminal surface 2 (16) of coil spring (15) with the up end contact of supporting shoe (8), helical compression spring (13) with the spiral opposite direction of coil spring (15) prevents that two springs from embedding each other, the thickness range of clearance (7) is 0.2mm-5mm, this is with the material, thickness and the tensile degree of punching material (1) are related to, install buffering elasticity ripple piece (17) in clearance (7), this is related to helical compression spring (13) with the elasticity of coil spring (15), set up buffering elasticity ripple piece (17) can prolong local mould life-span.

The invention relates to a local flexible structure of a male die of a thin-wall complex deep-drawing stamping part, which comprises the following parts:

1. the local deep drawing structure can obtain extra material quantity in advance, so that the area distribution of stamping part materials is changed by a small amount in advance, and the occurrence of the cracking condition is greatly avoided;

2. the dimensions of the gap 7 are important for the local improvement effect, and are related to materials, structural parameters of parts and the like, even the workshop temperature, and are accurately determined according to the situation when the gap is designed.

Drawings

The invention will be further described with reference to the accompanying drawings.

Fig. 1-9 show an example of a partially flexible structure of a male die of a thin-walled complex deep-drawn stamping, and the practical use of the present invention is not limited to the embodiment.

Detailed Description

Referring to fig. 1, which is an integral drawing of a drawing material and a part, the part is an automobile muffler bag made of stainless steel, fig. 2 is a male die drawing of an original die, which is an integral structure, fig. 3 and fig. 4 are improved partial flexible structure dies, a deep drawing movable die block 6 is consistent with the material and heat treatment process of a male die 4, a raised guide rail 9 is prefabricated by the deep drawing movable die block 6, a guide groove 11 is prefabricated by a partial window 18, the deep drawing movable die block 6 and a supporting block 8 are installed in the partial window 18, then the heat treatment of the processing of the shape of the male die 4 is completed, then the deep drawing movable die block 6 is removed for upper processing to form a gap 7, the size of the gap 7 for the muffler bag part is 1.5mm, fig. 5 is a blind hole 10 for installing a spiral compression spring 13 and a spiral spring 15, the diameter of the blind hole 10 is 16mm, the depth of the hole is 30mm, the deep drawing movable die block 6 is a partial structure for removing the spiral spring 13 and the diameter of the raised guide rail 9 is 1mm, the depth of the groove 12 is 4mm, the inclination angle is 30mm, the spiral spring 13 and the thickness of the elastic spring is 3.17 mm, the thickness of the corrugated spring is 3.17 mm, and the thickness of the corrugated spring is 3.17 mm, respectively, and the elastic sheet is the thickness of the corrugated spring is 3.17 mm, is the thickness, and the corrugated sheet is the thickness, respectively.

Finally, it should be noted that: the above description is only a preferred example of the present invention and is not intended to limit the present invention, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or that equivalent substitutions may be made in some of them, for example, the number of the helical compression springs 13 and the blind holes 10 may be increased or decreased, the shapes of the raised guide rails 9 and the grease grooves 12 may be changed, the hydraulic buffer structure may be provided between the deep drawing movable mold block 6 and the supporting block 8, etc., and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a local flexible structure of complicated deep-drawing stamping workpiece terrace die of thin wall, has the function of drawing the stamping material in advance in part, avoids deep-drawing position to appear drawing the situation, and characterized in that terrace die (4) have local window (18), deep-drawing movable mould piece (6) are installed to local window (18), deep-drawing movable mould piece (6) have deep-drawing mould structure (5), deep-drawing movable mould piece (6) both sides have protruding guide rail (9), local window (18) have guide groove (11), protruding guide rail (9) cooperation is installed in guide groove (11), deep-drawing movable mould piece (6) with have clearance (7) between the limit of local window (18), the lower part fixed mounting of local window (18) has supporting shoe (8), the up end of supporting shoe (8) is the first extreme position of deep-drawing movable mould piece (6), plane (19) of local window (18) are deep-drawing movable mould piece (6) second extreme position, spiral die (10) are seted up in the deep-drawing movable mould piece (10) have the blind hole.

2. The local flexible structure of the male die of the thin-wall complex deep-drawing stamping part is characterized in that grease grooves (12) are formed in the side surfaces of the convex guide rails (9) on two sides of the deep-drawing movable die block (6), the depth of each grease groove (12) is 0.5-3 mm, the width of each grease groove (12) is 2-10 mm, and the shape of each grease groove (12) is one of straight grooves, folding grooves and curved grooves.

3. The local flexible structure of the male die of the thin-wall complex deep-drawing stamping part according to claim 1, characterized in that the spiral compression spring (13) and the spiral spring (15) are installed in the blind hole (10), the lengths of the spiral compression spring (13) and the spiral spring (15) are one of the same and different, the end face 1 (14) of the spiral compression spring (13) and the end face 2 (16) of the spiral spring (15) are in contact with the upper end face of the supporting block (8), and the rotation directions of the spiral compression spring (13) and the spiral spring (15) are opposite.

4. A locally flexible structure of a male die for thin-walled complex deep-drawn stamping according to claim 1, characterized in that the gap (7) has a thickness in the range of 0.2mm-5mm.

5. A locally flexible structure of a male die for thin-walled complex deep-drawn stamping according to claim 1, characterized in that a buffer elastic bellows (17) is mounted in the gap (7).