Stainless steel sheet corrugation forming die

Abstract

The utility model relates to a stainless steel sheet corrugation forming die, which is suitable for reducing the thinning rate of a stainless steel sheet during corrugation forming, is also suitable for forming corrugations with smaller thinning rate on steel, copper and aluminum sheets, and is characterized by comprising a corrugation die, a micro-motion spring, a compensation boss and a compensation push plate, the corrugation die is provided with a large corrugation lower die and a large corrugation upper die, the large corrugation upper die is provided with a small corrugation forming die structure I, the large corrugation lower die is provided with a small corrugation forming die structure II, the fixed end of the large corrugation upper die is provided with a micro-motion spring mounting hole, and a micro-motion spring is mounted in the micro-motion spring mounting hole.

Description

Technical Field

[0001] The utility model relates to a stainless steel sheet corrugation forming die, which is suitable for reducing the thinning rate of the stainless steel sheet during corrugation forming, and is also suitable for forming corrugations with a small thinning rate on steel, copper and aluminum sheets. Background Art

[0002] With the demand for lightweight and cost reduction of automobiles, higher requirements are put forward for the precision forming technology of stainless steel sheet metal forming. At present, the thinning rate of stainless steel sheet after stretching forming in the stamping industry is generally 20%~30%, and surface scratches are inevitable, which poses a greater quality risk for occasions with high appearance requirements or harsh use environments; especially for the core parts of liquefied natural gas storage tanks, corrugated plates and corner pieces, a small step needs to be made at the overlapping parts to ensure the smooth progress of subsequent welding processes. When pressing the step, it will cause excessive local thinning, which may cause accidents when the liquefied natural gas storage tank works at about -170℃. Generally, the thinning rate is required to be less than 5%, that is, the thinnest part of a 1.2mm thick stainless steel plate after forming cannot be less than 1.14mm, while reducing surface scratches and ensuring high precision of the corrugated shape. Therefore, a split-type mold is proposed. When pressing the small step, the mold can move in a small lateral range to compensate for the bending at the step forming point, greatly reducing the thinning rate. Summary of the invention

[0003] The utility model aims to provide a stainless steel thin plate corrugation forming die in view of the above-mentioned deficiencies, which has the function of reducing the thinning rate of the stainless steel plate when forming corrugations. When the corrugation die is forming, the compensation push plate pushes the compensation boss downward to drive the die to overcome the micro-motion spring to make a small lateral movement, thereby compensating for the flow of the material when the small corrugations are formed, thereby greatly reducing the material thinning rate. The specific structure is composed of a corrugation die, a micro-motion spring, a compensation boss, and a compensation push plate.

[0004] In order to achieve the above purpose, the utility model adopts the following technical measures:

[0005] A stainless steel sheet corrugation forming die, characterized in that a large corrugation lower die and a large corrugation upper die are divided into two parts. When the large corrugation upper die moves downward to form small corrugations, a part of the large corrugation lower die and the large corrugation upper die can make a small lateral movement, so that the material thinning rate requirement can be achieved when forming small corrugations, and surface strain and scratches can be effectively reduced.

[0006] A stainless steel sheet corrugation forming die is realized by the following scheme: a stainless steel sheet corrugation forming die is composed of a corrugation die, a micro-motion spring, a compensation boss, and a compensation push plate; the corrugation die (5) has a large corrugation lower die (6) and a large corrugation upper die (7); the large corrugation upper die (7) has a small corrugation forming die structure one (20); the large corrugation lower die (6) has a small corrugation forming die structure two (24); after the large corrugation upper die (7) moves downward, it cooperates with the large corrugation lower die (6) to form small corrugations (3) in a corrugated plate (1) with small corrugations; the large corrugation upper die (7) has a large corrugation upper die fixed end (8), a large corrugation upper die gap (9) and a large corrugation upper die movable end (12); The large corrugated upper die fixed end (8) is capable of slight movement relative to the large corrugated upper die movable end (10); the large corrugated lower die (6) comprises a large corrugated lower die movable end (11), a large corrugated lower die gap (12) and a large corrugated lower die fixed end (13); the large corrugated lower die movable end (11) is capable of slight movement relative to the large corrugated lower die fixed end (13); the large corrugated upper die fixed end (8) comprises a micro-motion spring mounting hole (22); a micro-motion spring (14) is mounted in the micro-motion spring mounting hole (22); one end of the micro-motion spring (14) contacts the bottom of the micro-motion spring mounting hole (22); the large corrugated upper die movable end (10) comprises a large corrugated upper die The movable end side end surface (23), the other end of the micro-spring (14) is contact-mounted on the movable end side end surface (23) of the large corrugation upper mold, a compensation air gap (15) is provided between the large corrugation upper mold fixed end (8) and the large corrugation upper mold movable end (10), the large corrugation upper mold fixed end (8) is fixedly connected to the large corrugation upper mold connecting structure (21) through a compensation push plate to install a compensation push plate (18), the compensation push plate (18) moves up and down with the large corrugation upper mold (7), the compensation push plate (18) has a compensation push plate lower horizontal edge (19), the side bottom of the large corrugation upper mold movable end (10) has a compensation boss (16), the compensation boss (16) is slidingly contact-mounted The compensating push plate is provided with a lower horizontal edge (19), the large corrugation upper die moving end (10) cooperates with the micro-spring (14) to move laterally, the large corrugation lower die (6) is flexible due to the large corrugation lower die gap (12), the compensating boss (16) has a compensating boss height (17) relative to the bottom surface of the large corrugation upper die moving end (10), the value of the compensating boss height (17) is 0.3-1.5mm, the values ​​of the large corrugation upper die gap (9) and the large corrugation lower die gap (12) are 0.3-0.9mm, and the inclined surface widths of the small corrugation forming die structure one (20) and the small corrugation forming die structure two (24) are 1-5mm.

[0007] The utility model is a stainless steel sheet corrugated forming die with the following features:

[0008] 1. The large corrugated lower die and the large corrugated upper die adopt a disconnected structure, with a small gap between them, which can compensate for the movement of the material when forming small corrugations, achieve the purpose of reducing the thinning rate, and effectively reduce surface scratches and scratches;

[0009] 2. The value of the compensation boss height is small, the moving end of the large corrugated lower die and the large corrugated upper die has a small moving distance, the mold wear is small, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model will be further described below in conjunction with the accompanying drawings.

[0011] Attached Figure 1 -Attached Figure 4 The utility model is an implementation example of a stainless steel sheet corrugation forming die, and the actual use of the utility model is not limited to the implementation example. DETAILED DESCRIPTION

[0012] See attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 and attached Figure 4 , a stainless steel sheet corrugated forming die structure features: Figure 1 The corrugated plate 1 is a corrugated plate with small corrugations. The thickness of the corrugated plate 1 is 1.2 mm. The corrugated plate 1 has a short joint corrugation 2, a small corrugation 3 and a corrugated plate body 4. The height difference between the short joint corrugation 2 and the corrugated plate body 4 is 1.2 mm. The width of the small corrugation 3 is 2 mm. Figure 2 The corrugated die 5 comprises a large corrugated lower die 6 and a large corrugated upper die 7. Figure 3 The large corrugated upper die 7 has a large corrugated upper die fixed end 8, a large corrugated upper die gap 9 and a large corrugated upper die movable end 10, and the large corrugated lower die 6 has a large corrugated lower die movable end 11, a large corrugated lower die gap 12 and a large corrugated lower die fixed end 13. The values ​​of the large corrugated upper die gap 9 and the large corrugated lower die gap 12 are 0.5 mm. Figure 4 The fixed end 8 of the large corrugation upper die has a micro-spring mounting hole 22, the diameter of the micro-spring mounting hole 22 is 30mm, and the micro-spring mounting hole 22 is installed with a micro-spring 14. The micro-spring 14 adopts a rectangular cross-section spring wire, and the cross-sectional size of the rectangular cross-section spring wire is 1mm´1.5mm. The fixed end 8 of the large corrugation upper die is fixedly connected to the large corrugation upper die connecting structure 21 through a compensation push plate to install a compensation push plate 18. The lateral movement distance of the micro-spring 14 is 0.3mm, and the compensation boss 16 has a compensation boss height 17 relative to the bottom surface of the large corrugation upper die moving end 10, and the value of the compensation boss height 17 is 0.8mm.

Claims

1. A stainless steel sheet corrugation forming die, which has the function of low stainless steel sheet thinning rate when forming corrugations, characterized in that The device comprises a corrugated die, a micro-motion spring, a compensation boss, and a compensation push plate; the corrugated die (5) comprises a large corrugated lower die (6) and a large corrugated upper die (7); the large corrugated upper die (7) comprises a small corrugated forming die structure one (20); the large corrugated lower die (6) comprises a small corrugated forming die structure two (24); the large corrugated upper die (7) comprises a large corrugated upper die fixed end (8), a large corrugated upper die gap (9), and a large corrugated upper die movable end (10); the large corrugated lower die (6) comprises a large corrugated lower die movable end (11), a large corrugated lower die gap (12), and a large corrugated lower die fixed end (13); the large corrugated upper die fixed end (8) comprises a micro-motion spring mounting hole (22); the micro-motion spring mounting hole (22) is mounted with a micro-motion spring (14); one end of the micro-motion spring (14) contacts the bottom of the micro-motion spring mounting hole (22); the large corrugated The corrugated upper die moving end (10) has a large corrugated upper die moving end side end face (23), the other end of the micro-motion spring (14) is mounted in contact with the large corrugated upper die moving end side end face (23), a compensation air gap (15) is provided between the large corrugated upper die fixed end (8) and the large corrugated upper die moving end (10), the large corrugated upper die fixed end (8) is fixedly connected to a compensation push plate (18) via a compensation push plate and a large corrugated upper die connecting structure (21), the compensation push plate (18) moves up and down with the large corrugated upper die (7), the compensation push plate (18) has a compensation push plate lower horizontal edge (19), the side bottom of the large corrugated upper die moving end (10) has a compensation boss (16), the compensation boss (16) is mounted in sliding contact with the compensation push plate lower horizontal edge (19), and the large corrugated upper die moving end (10) cooperates with the micro-motion spring (14) to move laterally.

2. A stainless steel sheet corrugation forming die according to claim 1, characterized in that The compensating boss (16) has a compensating boss height (17) relative to the bottom surface of the large corrugated upper die movable end (10), and the value of the compensating boss height (17) is 0.3-1.5 mm.

3. A stainless steel sheet corrugation forming die according to claim 1, characterized in that The values ​​of the large corrugation upper die gap (9) and the large corrugation lower die gap (12) are 0.3-0.9 mm, and the inclined surface widths of the small corrugation forming die structure 1 (20) and the small corrugation forming die structure 2 (24) are 1-5 mm.

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