Automobile part flanging forming device capable of eliminating punching and cutting cracks

Abstract

The invention relates to an automobile part flanging forming device capable of eliminating punching and cutting cracks. The automobile part flanging forming device comprises an upper die body, a lower die body, a flanging module and a heating supporting block. The upper die body is correspondingly arranged above the lower die body; the flanging module is arranged on the inner side of the upper die body; the heating support block is arranged at the bottom of the flanging module; a plurality of heating rods which are transversely and evenly distributed are inserted into the lower portion of the surface of the side, opposite to the upper die body, of the flanging module and the upper portion of the surface of the side, opposite to the lower die body, of the heating supporting block. According to the method, the upper die body and the lower die body are heated in a face-to-face mode, the flanging module and the lower plate face of the flanging area are also heated, it can be guaranteed that no obvious temperature difference or hardness difference exists near the flanging area or in the thickness direction, and due to the fact that the influence of residual stress and micro holes near the flanging area can be weakened, flanging forming is better facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts manufacturing, in particular to an automobile parts flanging forming device capable of eliminating punching and shearing cracking. Background Art

[0002] In the field of automotive steel, when the strength level of automotive steel plates exceeds 780MPa, the shear edge sensitivity increases due to blanking. When the parts are flanging, the blanking edges will crack, making it difficult for the parts to pass the test. This defect has become a technical bottleneck in the industry.

[0003] Currently, the main method to prevent shear edge cracking during stamping is to remove the shear edge through secondary cutting on the production line. However, secondary cutting will reintroduce shear defects, making it difficult to avoid subsequent flange cracking. In addition, the problem of shear cracking can be improved by adjusting the punching and shearing gap, punching speed, etc., but the effect is general.

[0004] Therefore, there is an urgent need for a technical solution to stably solve the problem of cracking during flanging of ultra-high-strength steel to eliminate the problem of flanging cracking. Summary of the invention

[0005] In view of the above problems, the object of the present invention is to provide an automobile parts flanging forming device that eliminates punching and shearing cracking, which can effectively eliminate problems such as subsequent flanging cracking caused by shearing edge defects.

[0006] The technical solution adopted by the present invention is as follows:

[0007] The present invention proposes a flanging forming device for automobile parts that eliminates punching and shearing cracking, comprising an upper mold body, a lower mold body, a flanging module and a heating support block; the upper mold body is correspondingly arranged above the lower mold body; the flanging module is arranged on the inner side of the upper mold body; the heating support block is arranged at the bottom of the flanging module; a plurality of laterally evenly distributed heating rods are inserted into the lower part of the surface of the opposite side of the upper mold body of the flanging module and the upper part of the surface of the opposite side of the heating support block and the lower mold body.

[0008] Furthermore, a plurality of heating rods evenly distributed laterally are inserted into the bottom of the inner surface of the upper mold body and the upper portion of the inner surface of the lower mold body.

[0009] Furthermore, the temperature of the heating rods is controlled by thermocouples.

[0010] Furthermore, the heating temperature of the heating rod is 400-500°C.

[0011] Furthermore, the device also includes a cooling spray device; the cooling spray device can move freely.

[0012] Furthermore, the inner edge of the upper surface of the lower mold body is set to be an arc chamfer.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Compared with high-frequency magnetic induction heating, the temperature stability of the present invention is better and easier to control;

[0015] 2. In the present invention, the upper and lower mold body surfaces are heated, and the flanging module and the lower plate surface of the flanging area are also heated, which can ensure that there is no obvious temperature difference and hardness difference near the flanging area or in the thickness direction. Since the residual stress and micro-voids near the flanging area can be weakened, it is more conducive to flanging forming;

[0016] 3. The flexibly movable cooling spray equipment is more conducive to meeting the diversified shape requirements of the flanging area and more effectively reducing the flanging rebound. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the parts after flanging by the present invention;

[0019] Figure 3 It is a structural schematic diagram of the flanging module;

[0020] Figure 4 The specific structural diagram of the upper die is shown in FIG.

[0021] Figure 5 It is a structural schematic diagram of a heating support block;

[0022] Figure 6 It is a schematic diagram of the specific structure of the lower mold.

[0023] Among them, the figure numbers are: 1-flanging module; 2-upper mold body; 3-support block; 4-parts to be flanging; 5-lower mold body; 6-heating rod; 7-cooling spray; 8-parts after flanging. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] It should be noted that, in the description of the present invention, the terms "up", "down", "top", "bottom", "one side", "the other side", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0026] See attached Figure 1-6 The present invention provides an automobile parts flanging forming device for eliminating blanking and shearing cracking, comprising a flanging module 1, an upper mold body 2, a heating support block 3 and a lower mold body 5.

[0027] Among them, the upper mold body 2 is correspondingly arranged above the lower mold body 5; the inner edge flanging area of ​​the upper surface of the lower mold body 5 is set as an arc chamfer; the flanging module 1 is arranged on the inner side of the upper mold body 2; the heating support block 3 is correspondingly arranged at the bottom of the flanging module 1; in this embodiment, the upper mold body 2 and the lower mold body 5 are both arc structures, and the curvature corresponds, the flanging module 1 and the heating support block 3 are both fan-shaped structures, and the outer arc surfaces of the flanging module 1 and the heating support block 3 correspond to the inner arc surfaces of the upper mold body 2 and the lower mold body 5; a number of laterally evenly distributed heating rods 6 are inserted into the lower part of the outer arc surface of the flanging module 1 and the upper part of the outer arc surface of the heating support block 3.

[0028] In this embodiment, a plurality of heating rods 6 evenly distributed laterally are inserted into the bottom of the inner arc surface of the upper mold body 2 and the upper portion of the inner arc surface of the lower mold body 5 .

[0029] The heating rods 6 are all temperature-controlled by thermocouples, and the heating temperature is 400-500°C.

[0030] The device further comprises a cooling spray device 7; the cooling spray device 7 can move freely so as to cool the flanged position.

[0031] When flanging, place one side of the part 4 to be flanging horizontally on the upper surface of the lower mold body 5, and press it tightly through the upper mold body 2. The heating rods 6 in the upper mold body 2 and the lower mold body 5 are heated and kept warm for 3 minutes so that it cannot move in space; at the same time, control the flanging module 1 to start moving down, the flanging module 1 and the heating support block 3 are respectively located on the upper and lower sides of the part to be flanging area, the flanging module 1 and the heating rods 6 in the heating support block 3 heat the part 4 to be flanging together, and heat and keep warm for 3 minutes when contacting the part 4 to be flanging. When the thermocouple temperatures at all locations are within the range of 400-500°C, the heating support block 3 is removed, and the flanging module 1 continues to move down to realize the flanging deformation of the part. After the deformation is completed, the flanging position is quickly cooled in a certain direction by the cooling spray device 7 to further improve the flanging accuracy.

[0032] Matters not covered in the present invention are all known technologies.

[0033] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A flanging forming device for automobile parts to eliminate blanking and shearing cracking, characterized in that: The device comprises an upper mold body, a lower mold body, a flanging module and a heating support block; the upper mold body is correspondingly arranged above the lower mold body; the flanging module is arranged on the inner side of the upper mold body; the heating support block is arranged at the bottom of the flanging module; a plurality of laterally evenly distributed heating rods are inserted into the lower part of the surface of the flanging module on the side opposite to the upper mold body and the upper part of the surface of the heating support block on the side opposite to the lower mold body.

2. The flanging forming device for automobile parts for eliminating blanking and shearing cracking according to claim 1, characterized in that: A plurality of heating rods uniformly distributed laterally are inserted into the bottom of the inner surface of the upper mold body and the upper part of the inner surface of the lower mold body.

3. The flanging forming device for automobile parts for eliminating blanking and shearing cracking according to claim 1 or 2, characterized in that: The heating rods are all temperature controlled by thermocouples.

4. The flanging forming device for automobile parts for eliminating blanking and shearing cracking according to claim 3 is characterized in that: The heating temperature of the heating rod is 400-500°C.

5. The flanging forming device for automobile parts for eliminating blanking and shearing cracking according to claim 1, characterized in that: The device also includes a cooling spray device; the cooling spray device is able to move freely.

6. The flanging forming device for automobile parts for eliminating blanking and shearing cracking according to claim 1, characterized in that: The inner edge of the upper surface of the lower mold body is set to be an arc chamfer.

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