A cold stamping forming die for a roof front cross beam upper plate

Abstract

The utility model relates to a top cover front crossbeam upper plate cold punch forming die, including lower mould, upper die, the male die of setting on the lower mould, the female die of setting on the upper die and nitrogen gas spring, the male die and female die are opposite and set, the male die and female die form the cavity between when the lower mould and upper die close, the upper installation groove is opened to the upper die to the lower mould, the groove bottom of upper installation groove sets up the upper guide hole along the closing direction, the female die is slidably arranged in the upper installation groove, and the female die extends and sets up the female guide extension part, the female guide extension part extends into the upper guide hole, nitrogen gas spring sets up to the lower mould, and nitrogen gas spring connects the female die, the utility model provides a stable pressure extrusion forming in a duration period through nitrogen gas spring, guarantees the forming quality of work piece. Meanwhile, the female die is guided through the inner wall of upper installation groove, female guide extension part and female guide extension part, further improves the forming quality of work piece.

Description

Technical Field

[0001] This utility model relates to the field of stamping equipment technology, and in particular to a cold stamping die for the upper plate of the front crossbeam of the top cover. Background Technology

[0002] The front crossbeam of a car roof is a crucial component affecting vehicle safety performance and is made of high-strength steel. Cold stamping, formed at room temperature, does not alter the internal metallographic structure of the steel, making it suitable for the production of front crossbeams for car roofs.

[0003] However, the surface shape of the front crossbeam of a car roof is complex, mostly three-dimensional curved surfaces. Moreover, the surface of the front crossbeam of a car roof cannot have any defects after processing, and the edges must be clear to avoid affecting the appearance and paint quality of the vehicle. This makes the cold stamping forming of the front crossbeam of a car roof far more difficult than that of conventional parts.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a cold stamping forming mold for the upper plate of the front crossbeam of the roof, so as to form the front crossbeam of the car roof with high quality.

[0006] The technical solution of this utility model is as follows: The cold stamping die for the upper plate of the front crossbeam of the top cover includes a lower die, an upper die, a punch mounted on the lower die, a die mounted on the upper die, and a nitrogen spring. The punch and die face each other. When the lower and upper dies are closed, a cavity is formed between the punch and die. The upper die has an upper mounting groove facing the lower die. Along the die-closing direction, an upper guide hole is provided at the bottom of the upper mounting groove. The die is slidably mounted in the upper mounting groove, and a concave guide extension extends from the die. The concave guide extension extends into the upper guide hole. The nitrogen spring faces the lower die and is connected to the die.

[0007] A further technical solution involves installing two or more nitrogen springs along the length of the cavity. These nitrogen springs are positioned along the neutral layer line of the product.

[0008] A further technical solution involves creating a lower guide hole on the lower mold. An upper guide extension is provided on the upper mold. During mold closing, the upper guide extension extends into the lower guide hole.

[0009] A further technical solution involves providing a lower positioning rod within the lower guide hole. An upper positioning hole is provided at the end of the upper guide extension for the lower positioning rod to extend into.

[0010] A further technical solution involves opening a lower mounting groove in the lower die facing the upper die. The punch is positioned within the lower mounting groove. A lower balancing block is positioned between the side wall of the lower mounting groove and the punch.

[0011] A further technical solution is that, from the bottom of the lower mounting groove towards the opening of the lower mounting groove, the lower mounting groove gradually expands, that is, the lower mounting groove is set with an open opening.

[0012] A further technical solution involves an upper mounting groove formed in the upper mold facing the lower mold. The cavity mold is positioned within the upper mounting groove. An upper balancing block is positioned between the side wall of the upper mounting groove and the cavity mold.

[0013] A further technical solution is that, from the bottom of the upper mounting groove towards the opening of the upper mounting groove, the upper mounting groove gradually expands, that is, the upper mounting groove is set with an open opening.

[0014] A further technical solution is to provide a spring ejector pin on the surface of the die facing the punch.

[0015] A further technical solution involves setting a positioning block on the lower die around the punch. An oblong hole is formed on the positioning block. Fasteners are connected to the lower die along the oblong hole, fixing the positioning block on the lower die.

[0016] The beneficial technical effects of this utility model are as follows: (1) The cold stamping forming die for the upper plate of the front crossbeam of the top cover in this utility model is provided with a punch and a die. When the upper and lower dies are closed, the product can be cold stamped. The upper die is connected to the die by a nitrogen spring. During cold stamping, the nitrogen spring drives the die to press the blank before the die is fully closed. Then the upper die continues to move down until the upper and lower dies are fully closed. The die cooperates with the punch to complete the forming under the constant force support of the nitrogen spring. That is, during stamping, the nitrogen spring provides a stable pressure for a period of time to extrude and form the die, ensuring the forming quality of the workpiece. At the same time, the die is set in the upper mounting groove. The inner wall of the upper mounting groove can guide the die. The die is also provided with a concave guide extension, which, together with the upper guide hole, guides the movement of the die, fixes the movement path of the die, ensures the stability of the upper die during forming, and further improves the forming quality of the workpiece.

[0017] (2) Further, two or more nitrogen springs are provided along the center layer of the product. When the nitrogen springs drive the die to apply pressure, the nitrogen springs are provided along the center layer of the product, which facilitates uniform force distribution on the entire product.

[0018] (3) Furthermore, a lower guide hole and an upper guide extension extending into the lower guide hole are provided between the upper mold and the lower mold. When the mold is closed, the upper guide extension extends into the lower guide hole, restricting the movement path between the upper mold and the lower mold, ensuring that the upper mold and the lower mold are aligned when the mold is closed to guarantee the molding quality. Attached Figure Description

[0019] Figure 1 A schematic diagram of the cold stamping forming die for the upper plate of the front crossbeam of the top cover according to an embodiment of the present disclosure is shown in the parting state in the top view.

[0020] Figure 2 A schematic diagram of the cold stamping forming die for the upper plate of the front crossbeam of the top cover according to an embodiment of the present disclosure is shown in the mold parting state in the upward view.

[0021] Figure 3 A cross-sectional view in the vertical direction of a cold stamping die for the upper plate of the front crossbeam of the top cover according to an embodiment of the present disclosure is shown.

[0022] Figure 4 A partial enlarged view of point A is shown of a cold stamping die for the upper plate of the front crossbeam of the top cover according to an embodiment of the present disclosure.

[0023] Marked in the attached diagram: 1. Lower die; 11. Lower mounting groove; 111. Punch; 112. Lower balance block; 12. Lower guide hole; 121. Lower positioning rod; 2. Positioning block; 21. Waist-shaped hole; 3. Upper die; 31. Upper mounting groove; 311. Die; 312. Die guide extension; 313. Upper balance block; 314. Spring ejector pin; 32. Nitrogen spring; 33. Upper guide hole; 34. Upper guide extension; 341. Upper positioning hole. Detailed Implementation

[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0025] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Figure 1A schematic diagram of the cold stamping forming die for the upper plate of the front crossbeam of the top cover according to an embodiment of the present disclosure is shown in the parting state in the top view. Figure 2 A schematic diagram of the cold stamping forming die for the upper plate of the front crossbeam of the top cover according to an embodiment of the present disclosure is shown in the mold parting state in the upward view. Figure 3 A cross-sectional view in the vertical direction of a cold stamping die for the upper plate of the front crossbeam of a top cover according to an embodiment of this disclosure is shown. Please refer to... Figure 1 , Figure 2 and Figure 3 The cold stamping die for the upper plate of the front crossbeam of the top cover includes a lower die 1, an upper die 3, a punch 111 disposed on the lower die 1, a die 311 disposed on the upper die 3, and a nitrogen spring 32. In some embodiments, the nitrogen spring 32 may be a commercially available Kaller TU 1500-50 nitrogen spring 32. The punch 111 and the die 311 are arranged facing each other. When the lower die 1 and the upper die 3 are closed, a cavity is formed between the punch 111 and the die 311. The product is extruded and formed in the cavity. The upper die 3 has an upper mounting groove 31 facing the lower die 1. Along the mold closing direction, an upper guide hole 33 is provided at the bottom of the upper mounting groove 31. The die 311 is slidably disposed in the upper mounting groove 31, and a concave guide extension 312 extends from the die 311. The concave guide extension 312 extends into the upper guide hole 33. The nitrogen spring 32 is disposed facing the lower die 1 and is connected to the die 311. During cold stamping, a nitrogen spring 32 drives the die 311 to clamp the blank before it fully closes. Then, the upper die 3 continues to descend until the upper die 3 and lower die 1 are fully closed. Under the constant force support of the nitrogen spring 32, the die 311 cooperates with the punch 111 to complete the forming. That is, during stamping, the nitrogen spring 32 provides a stable pressure for a period of time to extrude and form the workpiece, ensuring the forming quality. At the same time, the die 311 is set in the upper mounting groove 31. The inner wall of the upper mounting groove 31 can guide the die 311. The die 311 is also provided with a concave guide extension 312, which, together with the upper guide hole 33, guides the movement of the die 311 and fixes the movement path of the die 311, ensuring the stability of the upper die 3 during forming and further improving the forming quality of the workpiece.

[0027] In some embodiments, two or more nitrogen springs 32 are provided along the length of the cavity. The nitrogen springs 32 are arranged along the neutral layer line of the product. When the nitrogen springs 32 drive the die 311 to apply pressure, the nitrogen springs 32 are arranged along the center layer of the product, which facilitates uniform force distribution on the entire product.

[0028] Please refer to Figure 1 , Figure 2 and Figure 3The lower mold 1 has a lower guide hole 12. The upper mold 3 extends with an upper guide extension 34. When the mold is closed, the upper guide extension 34 extends into the lower guide hole 12, restricting the movement path between the upper mold 3 and the lower mold 1, ensuring that the upper mold 3 and the lower mold 1 are aligned when the mold is closed to guarantee molding quality.

[0029] Preferably, a lower positioning rod 121 is provided inside the lower guide hole 12. An upper positioning hole 341 is provided at the end of the upper guide extension 34 for the lower positioning rod 121 to extend into. When the guide extension extends into the lower guide hole 12, the lower guide hole 12 and the lower positioning rod 121 are aligned to ensure the fit between the guide extension and the lower guide hole 12.

[0030] Figure 4 A partially enlarged view at point A shows a cold stamping die for the upper plate of the front crossbeam of the top cover according to an embodiment of this disclosure. Please refer to... Figure 1 , Figure 2 , Figure 3 and Figure 4 The lower die 1 has a lower mounting groove 11 facing the upper die 3. The punch 111 is disposed within the lower mounting groove 11. The inner wall of the lower mounting groove 11 guides the punch 111. A lower balancing block 112 is disposed between the side wall of the lower mounting groove 11 and the punch 111. The lower balancing block 112 adjusts the gap between the punch 111 and the inner wall of the lower mounting groove 11, ensuring that the upper die 3 and the lower die 1 are aligned. In some embodiments, the lower balancing block 112 may be made of commercially available Cr12MoV type cold work die steel.

[0031] Preferably, the lower mounting groove 11 gradually expands from its bottom towards its opening, meaning it is open. Correspondingly, the lower balancing block 112 can have a wedge-shaped cross-section in the vertical direction. By using the inclined inner wall of the lower mounting groove 11, and by moving and switching between lower balancing blocks 112 of different widths, the gap between the punch 111 and the inner wall of the lower mounting groove 11 can be easily adjusted, ensuring that the upper die 3 and the lower die 1 are aligned.

[0032] More preferably, positioning blocks 2 are provided on the lower die 1 around the punch 111. Multiple positioning blocks 2 work together to position the product in the forming position, facilitating the operator's placement of the blank and improving forming efficiency. Specifically, the positioning blocks 2 have oblong holes 21. Fasteners (not shown in the figure) are connected to the lower die 1 along the oblong holes 21, fixing the positioning blocks 2 on the lower die 1. The positional relationship between the fasteners and the positioning blocks 2 can be easily adjusted along the long axis of the oblong holes 21, thereby adjusting the relative position between the positioning blocks 2 and the lower die 1 to accommodate blanks of different sizes and improve positioning flexibility.

[0033] Please refer to Figure 1 , Figure 2 and Figure 3 An upper mold 3 has an upper mounting groove 31 facing the lower mold 1. A die 311 is disposed within the upper mounting groove 31. An upper balancing block 313 is disposed between the side wall of the upper mounting groove 31 and the die 311. The inner wall of the upper mounting groove 31 guides the die 311. The upper balancing block 313 adjusts the gap between the die 311 and the inner wall of the upper mounting groove 31 to ensure that the upper mold 3 and the lower mold 1 are aligned. In some embodiments, the upper balancing block 313 may be made of commercially available Cr12MoV type cold work die steel.

[0034] Preferably, the upper mounting groove 31 gradually expands from its bottom towards its opening, meaning it is open. Correspondingly, the upper balancing block 313 can have a wedge-shaped cross-section in the vertical direction. By using the inclined inner wall of the upper mounting groove 31, and by moving and switching between upper balancing blocks 313 of different widths, the gap between the die 311 and the inner wall of the upper mounting groove 31 can be easily adjusted, ensuring that the upper die 3 and the lower die 1 are aligned.

[0035] More preferably, a spring ejector pin 314 is provided on the surface of the die 311 facing the punch 111. A spring (not shown in the figure) is provided between the spring ejector pin and the die 311. During stamping, the spring ejector pin 314 always presses down on the workpiece to prevent the workpiece from moving back and forth during stamping.

[0036] The specific workflow of this utility model is as follows: The operator first prevents the blank from resting on the punch 111 by using positioning blocks 2 arranged around the punch 111 to position the blank. Then, the lifting mechanism (not shown in the figure) drives the upper die 3 downward to enter the pre-clamping stage. During this process, the spring cylinder pushes out the die 311, which protrudes from the lower surface of the upper die 3. The die 311 first cooperates with the punch 111 to clamp the blank. Then, the main forming stage begins. The upper die 3 continues to descend, and the die 311, supported by the constant force of the nitrogen spring 32, cooperates with the die 311 to complete the forming. Finally, the resetting stage begins. After forming is completed, the nitrogen spring 32 returns first, and then the upper die 3 moves upward. At this point, the product can be removed, completing the forming process.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A cold stamping die for the upper plate of the front crossbeam of a roof, characterized in that, The cold stamping die for the upper plate of the front crossbeam of the top cover includes a lower die, an upper die, a punch disposed on the lower die, a die disposed on the upper die, and a nitrogen spring; the punch and the die are arranged facing each other; when the lower die and the upper die are closed, a cavity is formed between the punch and the die; the upper die has an upper mounting groove facing the lower die; along the die closing direction, an upper guide hole is provided at the bottom of the upper mounting groove; the die is slidably disposed in the upper mounting groove, and a concave guide extension is provided on the die; the concave guide extension extends into the upper guide hole; the nitrogen spring is arranged facing the lower die, and the nitrogen spring is connected to the die.

2. The cold stamping die for the upper plate of the front crossbeam of the top cover as described in claim 1, characterized in that: Two or more nitrogen springs are provided along the length of the cavity; the nitrogen springs are provided along the neutral layer line of the product.

3. The cold stamping forming die for the upper plate of the front crossbeam of the top cover as described in claim 1, characterized in that: The lower mold has a lower guide hole; the upper mold extends to form an upper guide extension; when the mold is closed, the upper guide extension extends into the lower guide hole.

4. The cold stamping forming die for the upper plate of the front crossbeam of the top cover as described in claim 3, characterized in that: A lower positioning rod is provided inside the lower guide hole; an upper positioning hole is provided at the end of the upper guide extension for the lower positioning rod to extend into.

5. The cold stamping forming die for the upper plate of the front crossbeam of the top cover as described in claim 1, characterized in that: The lower die has a lower mounting groove facing the upper die; the punch is disposed in the lower mounting groove; a lower balance block is disposed between the side wall of the lower mounting groove and the punch.

6. The cold stamping forming die for the upper plate of the front crossbeam of the top cover as described in claim 5, characterized in that: From the bottom of the lower mounting groove toward the opening of the lower mounting groove, the lower mounting groove gradually expands, that is, the lower mounting groove is open.

7. The cold stamping forming die for the upper plate of the front crossbeam of the top cover as described in claim 1, characterized in that: The die cavity is disposed within the upper mounting groove; an upper balancing block is disposed between the side wall of the upper mounting groove and the die cavity.

8. The cold stamping forming die for the upper plate of the front crossbeam of the top cover as described in claim 7, characterized in that: From the bottom of the upper mounting groove toward the opening of the upper mounting groove, the upper mounting groove gradually expands, that is, the upper mounting groove is open.

9. The cold stamping forming die for the upper plate of the front crossbeam of the top cover as described in claim 1, characterized in that: The concave die has a spring-loaded pin on its surface facing the convex die.

10. The cold stamping die for the upper plate of the front crossbeam of the top cover as described in claim 1, characterized in that: A positioning block is provided on the lower die around the punch; an oblong hole is provided on the positioning block; a fastener is connected to the lower die along the oblong hole, and the positioning block is fixed on the lower die.

Images