High-strength plate part forming die

Abstract

The utility model discloses a high-strength plate part forming die which comprises a lower die insert, the lower die insert is of an inverted-T-shaped structure, an upper die insert matched with the lower die insert in structure is arranged above the lower die insert, sill type modeling rib inserts are arranged on the two sides of the lower die insert, and the sill type modeling rib inserts are arranged on the lower die insert. The upper mold insert and the sill type molding rib insert are correspondingly provided with molding grooves, the upper part of the sill type molding rib insert can extend into the molding grooves, a part molding cavity is formed among the upper mold insert, the lower mold insert and the sill type molding rib insert, the lower mold insert is fixed on the lower mold fixing body, and the sill type molding rib insert is fixed on the lower mold fixing body. And an adjusting gasket for adjusting the height is arranged between the sill type modeling rib insert and the lower die fixing body. The forming die has the beneficial effects that by improving a conventional internal material pressing forming mode and arranging the sill type modeling rib insert, in the forming process of the forming die, the springback of parts is obviously improved, the field debugging means is improved, the development cost of the die is reduced, and the debugging period of the die is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cold stamping dies, in particular to a high-strength plate part forming die. Background Art

[0002] In order to improve the collision safety of the vehicle body, more and more vehicle body designs use high-strength steel materials. In the process of stamping die development, high-strength steel parts have the following difficulties: 1. Due to its high tensile strength, the large molding tonnage leads to incomplete part molding; 2. Due to its high yield strength, the parts are prone to rebound after molding; 3. The precision of the parts is difficult to control, and the on-site debugging methods are limited.

[0003] One of the conventional forming methods of high-strength plate parts is to press the material from the outside, that is, in the form of drawing + floating ribs / sills. Although it has certain advantages in controlling the springback of parts, this method requires a larger material size and a greater pressing force; the second forming method is to press the material from the inside, that is, in the form of forming, but this method cannot control and adjust the springback of parts, which will increase the development cycle of the mold; the third forming method is to press the material from both sides, but this method is obviously not conducive to the control of mold costs, and it cannot avoid the defects of the previous two solutions. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a high-strength plate parts forming die with low cost and long debugging cycle.

[0005] The technical scheme is as follows: A high-strength plate part forming mold, the main points of which are that it includes a lower mold insert, the lower mold insert is in a "convex" shape structure, an upper mold insert adapted to the structure of the lower mold insert is arranged above the lower mold insert, threshold-type molding rib inserts are arranged on both sides of the lower mold insert, the upper mold insert and the threshold-type molding rib insert are correspondingly provided with forming grooves, the upper part of the threshold-type molding rib insert can extend into the forming groove, and a part forming cavity is formed between the upper mold insert, the lower mold insert and the threshold-type molding rib insert. With the above structure, the upper mold insert, the lower mold insert and the additional threshold-type molding rib insert cooperate with each other to complete the part forming, can cooperate to press the part into the desired shape, and effectively control the rebound of the part, wherein the threshold-type molding rib insert is used for high-strength plate parts, which can ensure its feasible strength.

[0006] As a preference, there are two upper mold inserts, and an upper mold pressing piece is arranged between the two upper mold inserts, and the upper mold pressing piece is located directly above the lower mold insert. With the above structure, the upper mold insert and the upper mold pressing piece together form the upper mold, and the upper mold pressing piece is located directly above the lower mold insert, so that the upper mold pressing piece can press the sheet material onto the lower mold insert to prevent sliding, and the upper mold insert is pressed downward for part molding.

[0007] As a preferred embodiment, it also includes a lower mold fixed body, and the lower mold insert and the threshold-type molding rib insert are both fixed on the lower mold fixed body. With the above structure, the lower mold insert and the threshold-type molding rib insert can be fixed together to form a lower mold as a whole with the lower mold fixed body.

[0008] As a preferred embodiment, the threshold-type molding rib insert is an "L"-shaped structure, and the side wall of the threshold-type molding rib insert is in close contact with the lower side wall of the lower mold insert. With the above structure, the threshold-type molding rib insert can be in close contact with the lower mold insert to prevent position movement, and the sheet material can be reasonably bent, and the rebound control of high-strength plate parts can be achieved. At the same time, the shape of the upper mold insert at the upper end corresponds to each other, which is convenient for part molding.

[0009] As a preferred embodiment: the threshold-type molding rib insert is fixed to the lower mold fixed body by screws, and an adjustment gasket is provided between the threshold-type molding rib insert and the lower mold fixed body. With the above structure, the height of the threshold-type molding rib insert can be adjusted by adjusting the gasket, so that the threshold-type molding rib insert reaches a suitable height to adapt to different degrees of part molding, and the adjustment gasket can be increased or decreased according to specific circumstances. The screws can ensure that the threshold-type molding rib insert and the lower mold fixed body are tightly and firmly connected to avoid the situation where the rebound of the part cannot be effectively controlled during the pressing process of the upper mold.

[0010] Preferably, the depth of the molding groove is 15-25 mm. With the above structure, at a height of 15-25 mm, the outer sill-shaped molding ribs begin to form, forming a locking effect, so that the internal material produces an expansion and stretching effect, which can effectively improve the springback of the parts.

[0011] Compared with the prior art, the utility model has the beneficial effects of: by improving the conventional internal pressure material forming method, the springback of parts is significantly improved during the forming process, the on-site debugging means is improved, the development cost of the mold is reduced, and the debugging cycle of the mold is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a side view of the utility model;

[0014] Figure 3 for Figure 2 Sectional view of AA;

[0015] Figure 4 It is a schematic diagram of the structure of high-strength plate parts;

[0016] Figure 5-13 Schematic diagram of the forming process;

[0017] Fig.14 This is a schematic diagram of part springback comparison. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with embodiments and drawings.

[0019] like Figures 1 to 3 As shown, a high-strength plate part forming mold mainly includes a lower mold insert 103, the lower mold insert 103 is in a "convex" shape structure, an upper mold insert 101 adapted to the structure of the lower mold insert 103 is arranged above the lower mold insert 103, threshold-type molding rib inserts 104 are arranged on both sides of the lower mold insert 103, and the upper mold insert 101 and the threshold-type molding rib insert 104 are correspondingly provided with a molding groove 108, and the upper part of the threshold-type molding rib insert 104 can extend into the molding groove 108 A part molding cavity 109 is formed between the upper mold insert 101, the lower mold insert 103 and the threshold-type molding rib insert 104. The upper mold insert 101, the lower mold insert 103 and the threshold-type molding rib insert 104 cooperate with each other to complete part molding. The threshold-type molding rib insert 104 can be used for high-strength plate parts. The threshold-type molding rib insert 104 can extend into the groove 108 to bend the high-strength plate parts to a certain extent. Therefore, the threshold-type molding rib insert 104 can effectively suppress the rebound of the parts.

[0020] There are two upper mold inserts 101, and an upper mold pressing piece 102 is arranged between the two upper mold inserts 101. The upper mold pressing piece 102 is located directly above the lower mold insert 103. The upper mold insert 101 and the upper mold pressing piece 102 are movably connected, and both can move up and down independently. The two upper mold inserts 101 have the same downward speed, and the upper mold pressing piece 102 can move downward first, and the upper mold insert 101 remains stationary. After the upper mold pressing piece 102 is stable, the upper mold insert 101 starts to move downward. The consistent downward speed can ensure that the two upper mold inserts 101 can touch the sheet material 107 at the same time, thereby ensuring that the two sides of the sheet material 107 are formed synchronously.

[0021] It also includes a lower mold fixed body 106, the lower mold insert 103 and the threshold-type molding rib insert 104 are both fixed on the lower mold fixed body 106, the threshold-type molding rib insert 104 is in an "L"-shaped structure, the side wall of the threshold-type molding rib insert 104 is tightly attached to the lower side wall of the lower mold insert 103, the threshold-type molding rib insert 104 is screwed to the lower mold fixed body 106, and an adjustment gasket 105 for height adjustment is arranged between the threshold-type molding rib insert 104 and the lower mold fixed body 106, the adjustment gasket 105 has a variety of thickness specifications, and can be replaced and adjusted according to the required height.

[0022] The depth of the molding groove (108) is 15-25 mm. At this time, the outer sill-shaped molding ribs begin to form, forming a locking effect, thereby causing the internal material to produce an expansion and stretching effect, which can effectively improve the springback of the parts.

[0023] like Figure 4 The high-strength plate part shown has the following characteristics: the part is made of HC340 / 590DP with a material thickness of 2.0mm; the part is arc-shaped with a length of about 1300mm and is very prone to springback distortion; the part has large strength and plate thickness, making it difficult to improve accuracy on site, so it is necessary to control the springback of the high-strength plate part to a certain extent.

[0024] like Figures 5 to 13 As shown, the high-strength plate part forming mold is used to form parts. First, the installation position and initial height of the threshold-type molding rib insert 104 are determined. The installation position and initial height of the threshold-type molding rib insert 104 are determined according to the part rebound state. The height of the threshold-type molding rib insert 104 is adjusted by selecting a suitable adjustment gasket 105, and finally it is fixedly connected to the lower mold fixed body 106 by screws; then the high-strength plate material 107 is placed on the lower mold insert 103, and the upper mold pressing piece 102 just above the lower mold insert 103 moves downward to press the plate material 107 to prevent the plate material 107 from moving; when the upper mold pressing piece 102 firmly presses the plate material 107, the upper mold pressing piece 102 is pressed downward to press the plate material 107 to prevent the plate material 107 from moving; The upper mold inserts 101 on both sides of 102 move downward at the same speed, and both ends of the upper mold insert 101 contact the sheet 107 at the same time, and the part begins to form; the upper mold insert 101 continues to descend and contacts the threshold-type molding rib insert 104. The height of the threshold-type molding rib insert 104 is controlled to be 15-25mm before the mold descends to the bottom. The outer threshold-type molding rib begins to form, and the outer threshold-type molding rib insert 104 begins to produce a locking effect, and the inside of the part expands and stretches, and the tensile stress on the sheet 107 gradually increases. The upper mold insert 101 continues to descend to the dead point of the mold, the threshold-type molding rib forming reaches the maximum value, and the tensile stress on the sheet 107 also reaches the maximum, and the part forming is completed.

[0025] like Fig.14 As shown, by comparing the high-strength plate parts after trimming, Fig.14 2 is a part made of conventional structure, and 3 is a part made by the molding die of the utility model. It can be clearly seen that the quality of the side wall and flange of the part made by the molding die of the utility model is significantly improved, and its rebound state is greatly improved, which is more in line with the lower die insert 103 of the stamping die.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A high-strength plate part forming die, characterized in that: The invention comprises a lower mold insert (103), wherein the lower mold insert (103) is in a "convex"-shaped structure, an upper mold insert (101) adapted to the structure of the lower mold insert (103) is arranged above the lower mold insert (103), threshold-type molding rib inserts (104) are arranged on both sides of the lower mold insert (103), the upper mold insert (101) and the threshold-type molding rib insert (104) are correspondingly provided with molding grooves (108), the upper part of the threshold-type molding rib insert (104) can extend into the molding groove (108), and a part molding cavity (109) is formed between the upper mold insert (101), the lower mold insert (103) and the threshold-type molding rib insert (104).

2. The high-strength plate parts forming mold according to claim 1, characterized in that: There are two upper mold inserts (101), and an upper mold pressing piece (102) is arranged between the two upper mold inserts (101). The upper mold pressing piece (102) is located directly above the lower mold insert (103).

3. The high-strength plate parts forming mold according to claim 1 or 2, characterized in that: It also comprises a lower mould fixing body (106), on which the lower mould insert (103) and the threshold moulding rib insert (104) are both fixed.

4. The high-strength plate parts forming mold according to claim 3, characterized in that: The threshold-type molding rib insert (104) is in an "L"-shaped structure, and the side wall of the threshold-type molding rib insert (104) is closely attached to the lower side wall of the lower mold insert (103).

5. The high-strength plate parts forming mold according to claim 4, characterized in that: The threshold-type molding rib insert (104) is screwed onto the lower mold fixed body (106), and an adjustment gasket (105) for height adjustment is provided between the threshold-type molding rib insert (104) and the lower mold fixed body (106).

6. The high-strength plate parts forming mold according to claim 5, characterized in that: The depth of the molding groove (108) is 15-25 mm.

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