An automobile drawing die

Abstract

The utility model relates to the technical field of draw -deep -drawing die, and disclose an automobile draw -deep -drawing die, including lower mould, the upper portion of lower mould is matched and installed with upper mould, the inside of upper mould is installed with mould cutter mounting plate through hydraulic equipment, the inside of mould cutter mounting plate is equipped with the connecting plate through the thread mounting of fastening bolt, the upper portion of connecting plate is fixed with lower die cutter, the inside of upper mould is equipped with forming chamber. The automobile draw -deep -drawing die, through the inside of lower die cutter setting of upper die cutter, form the space between lower die cutter and upper die cutter and form the space, and the internal angle of lower die cutter and upper die cutter is equipped with first chamfer and second chamfer respectively, and first chamfer and second chamfer are arc, when draw -deep -drawing operation is carried out to the calendering plate, first chamfer and second chamfer reduce the friction resistance between draw -deep -drawing plate and lower die cutter and upper die cutter, thereby avoid the inside friction too big, lead to draw -deep -drawing plate to crack and damage because of pressure, improve draw -deep -drawing die forming effect.

Description

Technical Field

[0001] This utility model relates to the field of drawing die technology, specifically to an automotive drawing die. Background Technology

[0002] Automotive drawing dies are a type of mold used in the manufacturing of automotive parts. They are mainly used for forming processes such as deep drawing and drawing of metal sheets. The drawing process involves applying pressure to metal sheets (such as steel sheets, aluminum sheets, etc.) through a mold, causing them to deform along the shape of the mold to form parts of a specific shape. This process is often used to produce automotive body parts such as car bodies, doors, and hoods.

[0003] Currently in the industry, the process design for drawing with corner cutting involves designing the corner cutting edge as a right angle. However, during the drawing process, the material tends to move inwards when cutting at a right angle, causing friction and interference between the cutting point and the upper die. This results in the upper die cutting edge creating a groove. The excessive friction prevents the material from moving through the feed hole, causing it to tear and accumulate in the pressure ring area, resulting in damage or cracking. Utility Model Content

[0004] To address the shortcomings of existing automotive drawing dies, this utility model provides an automotive drawing die with a first chamfer and a second chamfer on the inner corners of the lower die and the upper die. The first chamfer and the second chamfer are arc-shaped, which will produce a sound on the drawn structure during the drawing process. At the same time, due to their arc shape, the friction force is reduced during drawing, avoiding the problem of excessive friction causing tearing damage to the drawn sheet, thus solving the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: an automotive drawing die, including a lower die, an upper die mounted on the upper part of the lower die, a die-cutting plate mounted inside the upper die via a hydraulic device, a connecting plate mounted inside the die-cutting plate via fastening bolts, a lower die-cutting tool fixed on the upper part of the connecting plate, a forming chamber opened inside the upper die, and an upper die-cutting tool mounted on one side inside the forming chamber.

[0006] Preferably, the die-cutting plate is installed inside the upper die, wherein a drawing plate is held between the lower die and the upper die.

[0007] Preferably, the lower die cutter and the upper die cutter are movably sleeved inside the forming chamber, and the drawn plate is placed between the lower die and the lower die cutter after drawing.

[0008] Preferably, the external devices of the lower mold and the upper mold have telescopic components, and a clamping component is formed between the lower mold and the upper mold.

[0009] Preferably, the lower die cutter has an opening on its inner side, and the upper die cutter is disposed inside the opening, with a matching gap of less than 0.1 mm between the lower die cutter and the upper die cutter.

[0010] Preferably, the lower die cutter has a first chamfer on its outer side and the upper die cutter has a second chamfer on its inner side, both of which are arc-shaped.

[0011] Compared with existing automotive drawing dies, this utility model has the following advantages:

[0012] This automotive drawing die has an upper die set inside the lower die, forming a forming space between them. The lower and upper dies have a first chamfer and a second chamfer on their inner corners, respectively. These chamfers are rounded. During the drawing operation of the rolled sheet, the first and second chamfers reduce the frictional resistance between the rolled sheet and the lower and upper dies, thus preventing excessive internal friction that could cause the rolled sheet to crack or be damaged under pressure, thereby improving the forming effect of the drawing die. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0014] Figure 2 This is a partial cross-sectional view of the main body of this utility model;

[0015] Figure 3 This is a schematic diagram of the upper and lower molds of this utility model in their disassembled state.

[0016] Figure 4 This is a partially enlarged structural diagram of the lower die cutter of this utility model;

[0017] Figure 5 This is a partially enlarged structural diagram of the upper die cutter of this utility model.

[0018] In the diagram: 1. Lower mold; 2. Upper mold; 3. Die-cutting plate; 4. Fastening bolt; 5. Connecting plate; 6. Lower die-cutting tool; 7. Molding chamber; 8. Upper die-cutting tool; 9. First chamfer; 10. Second chamfer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 An automotive drawing die includes a lower die 1, an upper die 2 mounted on the upper part of the lower die 1, and after the lower die 1 and the upper die 2 are pressed together, the lower die 1 and the upper die 2 limit the four sides of the drawing plate. A die-cutting plate 3 is installed inside the upper die 2 through a hydraulic device. The die-cutting plate 3 drives the lower die 6 to move. The lower die 6 performs drawing processing on automotive parts. A connecting plate 5 is threadedly installed inside the die-cutting plate 3 through fastening bolts 4. The lower die 6 is fixed on the upper part of the connecting plate 5. A forming chamber 7 is opened inside the upper die 2. An upper die 8 is mounted on one side inside the forming chamber 7. The upper die 8 is engaged with the inner side of the lower die 6. The lower die 1, the lower die 6 and the upper die 8 are pressed together to form a part forming space.

[0021] Please see Figure 4 The die-cutting plate 3 is installed inside the upper mold 2. The drawing plate is clamped between the lower mold 1 and the upper mold 2. The die-cutting plate 3 is installed inside the upper mold 2 and simultaneously limits the position of the connecting plate 5. After the drawing plate is clamped and limited by the lower mold 1 and the upper mold 2, the die-cutting plate 3 is moved inside the upper mold 2 by hydraulic equipment. That is, the die-cutting plate 3 presses the drawing plate between the lower mold 1 and the upper mold 2 to ensure the tightness of the pressed plate.

[0022] Please see Figure 2 The lower die 6 and the upper die 8 are movably sleeved inside the forming chamber 7. After the drawing plate is drawn, it is placed between the lower die 1 and the lower die 6. The lower die 6 and the upper die 8 are sleeved inside the forming chamber 7, that is, the forming chamber 7 provides moving space for the lower die 6 and the upper die 8. After the drawing plate is drawn, it is placed between the lower die 1 and the lower die 6, which can drive the prepared automobile parts to undergo forming processing.

[0023] Please see Figure 2 The lower mold 1 and the upper mold 2 have telescopic components on their external parts, and a clamping component is formed between the lower mold 1 and the upper mold 2. The telescopic components control the opening and closing of the lower mold 1 and the upper mold 2. After the lower mold 1 and the upper mold 2 are closed, the lower mold 1 and the upper mold 2 apply a certain pressure to the drawing plate to prevent the drawing plate from shifting position after being punched by the die mounting plate 3.

[0024] Please see Figure 2An opening is formed on the inner side of the lower die 6, and the upper die 8 is located inside the opening. The matching gap between the lower die 6 and the upper die 8 is less than 0.1mm. The opening is formed on the inner side of the lower die 6, and the upper die 8 is located inside the lower die 6. That is, after the drawing plate is drawn, the upper die 8 drives the inner side of the drawing plate to form an opening. At the same time, the matching gap between the lower die 6 and the upper die 8 is less than 0.1mm to avoid the gap being too large, which would affect the part forming efficiency.

[0025] Please see Figure 4 and Figure 5 The lower die 6 has a first chamfer 9 on its outer side and the upper die 8 has a second chamfer 10 on its inner side. Both the first chamfer 9 and the second chamfer 10 are arc-shaped. By having the second chamfer 10 on the inner side of the upper die 8, which is arc-shaped, after the drawing plate is installed between the lower die 1 and the upper die 2, the upper die 8 squeezes and restricts one side of the drawing plate. At the same time, the die mounting plate 3 controls the drawing process of the drawing plate. The arc-shaped inner surface of the upper die 8 effectively reduces the frictional resistance between the drawing plate and the inner corner of the upper die 8, thereby avoiding damage to the drawing plate due to excessive friction and tension.

[0026] Working principle: In use, the connecting plate 5 is installed inside the die-cutting mounting plate 3, which is located inside the upper die 2. The upper die-cutting blade 8 is installed inside the lower die 1 according to the different positions of the lower die-cutting blade 6. At the same time, the die-cutting mounting plate 3 is controlled to move outward, and the drawing plate is installed between the lower die 1 and the upper die 2. After the lower die 1 and the upper die 2 are closed, the lower die 1 and the upper die 2 press and limit the position of the drawing plate. At the same time, the die-cutting mounting plate 3 is activated, and the die-cutting mounting plate 3 pushes the lower die-cutting blade 6 to press the drawing plate. Meanwhile, the lower die-cutting blade 6 and the upper die-cutting blade 8 have a first chamfer 9 and a second chamfer 10 on their inner sides. The first chamfer 9 and the second chamfer 10 reduce the friction on the inner side of the drawing plate and reduce the problem of deformation and damage to the drawing plate due to excessive friction and tension.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automotive drawing die, comprising a lower die (1), wherein an upper die (2) is fitted onto the upper part of the lower die (1), and a die-cutting plate (3) is mounted inside the upper die (2) via a hydraulic device, characterized in that: The mold blade mounting plate (3) is fitted with a connecting plate (5) by fastening bolts (4) inside. The upper part of the connecting plate (5) is fixed with a lower mold blade (6). The upper mold (2) has a forming chamber (7) inside. The upper mold blade (8) is installed on one side inside the forming chamber (7).

2. The automotive drawing die according to claim 1, characterized in that: The die-cutting plate (3) is installed inside the upper die (2), wherein the drawing plate is held between the lower die (1) and the upper die (2).

3. The automotive drawing die according to claim 1, characterized in that: The lower die cutter (6) and the upper die cutter (8) are movably sleeved inside the forming chamber (7), and the drawn plate is placed between the lower die (1) and the lower die cutter (6) after being drawn.

4. The automotive drawing die according to claim 1, characterized in that: The lower mold (1) and the upper mold (2) have telescopic components on their external devices, and a clamping component is formed between the lower mold (1) and the upper mold (2).

5. The automotive drawing die according to claim 1, characterized in that: An opening is formed on the inner side of the lower die cutter (6), and the upper die cutter (8) is disposed inside the opening. The matching gap between the lower die cutter (6) and the upper die cutter (8) is less than 0.1 mm.

6. The automotive drawing die according to claim 1, characterized in that: The lower die cutter (6) has a first chamfer (9) on its outer side, and the upper die cutter (8) has a second chamfer (10) on its inner side. Both the first chamfer (9) and the second chamfer (10) are arc-shaped.

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