Punch forming die for sheet metal part of anti-collision front bumper of heavy truck

Abstract

The utility model belongs to the technical field of dies, and particularly relates to a heavy truck anti-collision front bumper sheet metal part punch forming die which comprises an upper die and a lower die, a male die is arranged on the lower die, a female die matched with the male die is arranged in the upper die, and a first step, a second step, a third step and a fourth step are sequentially arranged on the male die from top to bottom. The first step, the second step, the third step and the fourth step are all in a convex arc shape, the radius r1 of the first step is larger than the radius r2 of the second step, the radius r2 of the second step is larger than the radius r3 of the third step, and during die assembly, the first step, the second step, the third step and the fourth step are located between a product trimming line and a female die opening fillet of the female die. The front bumper sheet metal part manufactured by the utility model is high in strength, can meet the cross-country requirement of a heavy truck, does not have impact lines on the appearance surface of a finished product, and is high in quality of the finished product.

Description

Technical field:

[0001] The utility model belongs to the technical field of molds, in particular to a stamping mold for a heavy truck anti-collision front bumper sheet metal part. Background technology:

[0002] The structure of the anti-collision front bumper of heavy trucks, such as Figure 1 、 2 As shown, its depth is relatively deep. During the sheet metal stamping process, friction between the die opening of the upper die and the sheet metal creates impact lines. As the drawing depth increases, these impact lines flow into the product's exterior, affecting the finished product's appearance. Therefore, heavy-duty truck anti-collision front bumpers are typically molded using plastic injection molding rather than sheet metal stamping. However, plastic front bumpers lack strength and cannot meet the off-road requirements of heavy-duty trucks. Summary of the invention:

[0003] The purpose of the utility model is to provide a stamping die for a heavy truck anti-collision front bumper sheet metal part. The front bumper sheet metal part made by the die has high strength and can meet the off-road requirements of heavy trucks. No impact lines will appear on the appearance surface of the finished product, and the finished product has high quality.

[0004] The utility model is achieved in this way:

[0005] A stamping die for a heavy-duty truck anti-collision front bumper sheet metal part comprises an upper die and a lower die, wherein the lower die is provided with a punch, and the upper die is provided with a die matching the punch, and the punch is provided with step one, step two, step three and step four from top to bottom, wherein step one, step two, step three and step four are all convex arc-shaped, and the radius r1 of step one is greater than the radius r2 of step two, and the radius r2 of step two is greater than the radius r3 of step three. When the die is closed, the steps one, step two, step three and step four are located between the product trimming line and the die mouth radius of the die.

[0006] In the above-mentioned heavy truck anti-collision front bumper sheet metal stamping die, the upper die is provided with a downward convex block, the block is located outside the rounded corner of the die mouth, and the lower die is provided with a groove adapted to the block.

[0007] In the above-mentioned stamping die for the anti-collision front bumper sheet metal part of a heavy truck, more than two protrusions are arranged at intervals.

[0008] In the above-mentioned heavy truck anti-collision front bumper sheet metal stamping die, the radius r1 of step one is 4 to 6 times the radius r2 of step two, and the radius r2 of step two is 1.5 to 2.5 times the radius r3 of step three.

[0009] In the above-mentioned heavy truck anti-collision front bumper sheet metal stamping die, the transition between step one and step two is through a concave arc one, the transition between step two and step three is through a concave arc two, and the transition between step three and step four is through a concave arc three.

[0010] In the above-mentioned stamping die for the anti-collision front bumper sheet metal part of a heavy truck, the radius r5 of the arc 1 is 3 to 4 times the radius r6 of the arc 2.

[0011] In the above-mentioned stamping die for the anti-collision front bumper sheet metal part of a heavy truck, the radius R of the fillet of the die opening is 10 mm-15 mm.

[0012] The outstanding advantages of the utility model compared with the prior art are:

[0013] 1. The utility model provides steps 1, 2, 3, and 4 on the punch, effectively lengthening the length from the fillet of the die mouth to the trimming line of the product, thereby preventing the impact line from flowing into the appearance surface of the product, thereby effectively preventing the appearance of the impact line on the appearance surface of the finished product; the front bumper sheet metal made by the mold of the utility model has high strength, can meet the requirements of heavy-duty trucks for off-road driving, and no impact line will appear on the appearance surface of the finished product, and the finished product has high quality;

[0014] 2. The upper die of the present invention is provided with a downward convex block, which is located outside the rounded corner of the die mouth. The lower die is provided with a groove that matches the convex block, further reducing the upward movement of the impact line. Description of the drawings:

[0015] Figure 1 It is a three-dimensional finished product of the front bumper of the utility model. Figure 1 ;

[0016] Figure 2 It is a three-dimensional finished product of the front bumper of the utility model. Figure 2 ;

[0017] Figure 3 It is a three-dimensional diagram of the mold of the utility model;

[0018] Figure 4 It is a cross-sectional view of the mold of the present utility model;

[0019] Figure 5 It is a three-dimensional diagram of the lower die and the punch of the utility model;

[0020] Figure 6 It is a three-dimensional diagram of the upper mold of the utility model;

[0021] Figure 7 This is the CAE analysis diagram of the utility model;

[0022] Figure 8 It is a three-dimensional diagram of the front bumper of the present invention after stamping.

[0023] Figure numerals: 1. Upper die; 2. Lower die; 3. Punch; 4. Die; 5. Step one; 6. Step two; 7. Step three; 8. Step four; 9. Product trimming line; 10. Die mouth radius; 11. Bump; 12. Groove; 13. Arc one; 14. Arc two; 15. Arc three; 16. Sheet. Specific implementation method:

[0024] The present invention is further described below with reference to specific embodiments. Figure 1 —8:

[0025] A stamping die for a heavy-duty truck anti-collision front bumper sheet metal part comprises an upper die 1 and a lower die 2, wherein the lower die 2 is provided with a punch 3, and the upper die 1 is provided with a die 4 that matches the punch 3. The punch 3 is provided with a step 1 5, a step 2 6, a step 3 7 and a step 4 8 from top to bottom, wherein the step 1 5, the step 2 6, the step 3 7 and the step 4 8 are all convex arc-shaped, and the radius r1 of the step 1 5 is greater than the radius r2 of the step 2 6, and the radius r2 of the step 2 6 is greater than the radius r3 of the step 3 7. When the mold is closed, the step 1 5, the step 2 6, the step 3 7 and the step 4 8 are located between the product trimming line 9 and the die mouth fillet 10 of the die 4.

[0026] The working principle of this utility model is as follows: Figure 3-7 As shown, the sheet 16 is placed on the lower die 2, the upper die 1 moves downward, and the punch 3 and the die 4 cooperate to press the sheet 16 into the required shape. The product after stamping is as follows Figure 8 shown.

[0027] like Figure 3-7 As shown, the present invention provides steps 1 5, 2 6, 3 7, and 4 8 on the punch 3, effectively lengthening the radius 10 of the die opening to the trim line 9 of the product. This prevents the impact line from flowing into the product's exterior surface, effectively preventing the appearance of impact lines on the finished product. The front bumper sheet metal produced by this mold is strong enough to meet the off-road requirements of heavy trucks, and the impact line is not visible on the finished product's exterior surface, ensuring high quality.

[0028] To further reduce the upward movement of the impact line, the upper die 1 is provided with a downwardly convex block 11, which is located outside the die opening radius 10, and the lower die 2 is provided with a groove 12 that matches the block 11. The block 11 and the groove 12 cooperate to pull the edge of the sheet 16, which can effectively reduce the upward movement of the impact line.

[0029] Preferably, there are two or more convex blocks 11 spaced apart from each other. In this embodiment, there are two convex blocks 11.

[0030] Furthermore, the radius r1 of step 1 5 is 4 to 6 times the radius r2 of step 2 6, and the radius r2 of step 2 6 is 1.5 to 2.5 times the radius r3 of step 3 7. In this embodiment, the radius r1 of step 1 5 is 150.42 mm, the radius r2 of step 2 6 is 30 mm, the radius r3 of step 3 7 is 15 mm, and the radius r4 of step 4 8 is 15 mm.

[0031] Furthermore, the step 1 5 and the step 2 6 are transitioned through an inward concave arc 13, the step 2 6 and the step 3 7 are transitioned through an inward concave arc 2 14, and the step 3 7 and the step 4 8 are transitioned through an inward concave arc 3 15.

[0032] Furthermore, the radius r5 of the arc 13 is 3 to 4 times the radius r6 of the arc 2 14. In this embodiment, the radius r5 of the arc 13 is 131.68 mm, the radius r6 of the arc 2 14 is 38.83 mm, and the radius r7 of the arc 3 15 is 40.1 mm.

[0033] To reduce the impact line, the radius R of the die fillet 10 is 10-15 mm. A large radius of the die fillet 10 effectively reduces the surface contact pressure between the die fillet 10 and the sheet 16, resulting in a shallower impact mark. In this embodiment, the radius R of the die fillet 10 is 12 mm.

[0034] Furthermore, the blank holding force of the mold of the present invention is 250 tons.

[0035] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stamping die for a heavy truck anti-collision front bumper sheet metal part, characterized by: The invention comprises an upper die (1) and a lower die (2), wherein a punch (3) is provided on the lower die (2), and a die (4) adapted to the punch (3) is provided in the upper die (1), and a step one (5), a step two (6), a step three (7) and a step four (8) are provided on the punch (3) from top to bottom in sequence, wherein the step one (5), the step two (6), the step three (7) and the step four (8) are all in the shape of an outwardly convex arc, and the radius of the step one (5) is greater than the radius of the step two (6), and the radius of the step two (6) is greater than the radius of the step three (7). When the die is closed, the step one (5), the step two (6), the step three (7) and the step four (8) are located between the product trimming line (9) and the die mouth fillet (10) of the die (4).

2. The stamping die for a heavy truck anti-collision front bumper sheet metal part according to claim 1, characterized in that: The upper die (1) is provided with a downwardly convex block (11), the block (11) is located outside the die mouth radius (10), and the lower die (2) is provided with a groove (12) adapted to the block (11).

3. The stamping die for a heavy truck anti-collision front bumper sheet metal part according to claim 2, characterized in that: There are more than two protrusions (11) arranged at intervals.

4. The stamping die for a heavy truck anti-collision front bumper sheet metal part according to claim 1, characterized in that: The radius of step one (5) is 4 to 6 times the radius of step two (6), and the radius of step two (6) is 1.5 to 2.5 times the radius of step three (7).

5. The stamping die for a heavy truck anti-collision front bumper sheet metal part according to claim 1, characterized in that: The transition between step 1 (5) and step 2 (6) is through an inward-concave arc 1 (13), the transition between step 2 (6) and step 3 (7) is through an inward-concave arc 2 (14), and the transition between step 3 (7) and step 4 (8) is through an inward-concave arc 3 (15).

6. The stamping die for a heavy truck anti-collision front bumper sheet metal part according to claim 5, characterized in that: The radius of the arc one (13) is 3 to 4 times the radius of the arc two (14).

7. The stamping die for a heavy truck anti-collision front bumper sheet metal part according to claim 1, characterized in that: The radius of the fillet (10) of the die opening is 10 mm to 15 mm.

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