Ultra-precision 180-degree reverse folding stamping forming process structure

Abstract

The invention discloses an ultra-precision 180-degree reverse folding stamping forming process. The process comprises the steps that firstly, a pre-folding line is formed on a product unfolding blank (73); and 2, sequentially carrying out 45-degree bending forming, 90-degree bending forming, 120-degree bending forming, 170-degree bending forming and 180-degree bending forming on the two to-be-bent parts (71) of the unfolded blank of the product (70), and finally forming the product (70). The problem that 180-degree reverse folding of a product is difficult to form is solved, the forming process structure is novel and practical, and stable productivity is guaranteed.

Description

Technical Field

[0001] The invention relates to a reverse folding stamping process, in particular to an ultra-precision 180° reverse folding stamping forming process structure. Background Art

[0002] The present invention relates to an ultra-precision 180° reverse bending stamping forming process structure, which is a new breakthrough in the field of continuous stamping in the design of precision progressive stamping die structures, and its application has been greatly improved. The bending portion 71 of the product 70 is a 180° reverse bending stamping part. In the traditional manufacturing process, the bending forming method is relatively simple, and the product structure strength is often small, while the 180° reverse bending stamping part has relatively strong stability and is widely used. However, the product structure is relatively complex, and the difficulty of stamping is relatively large. In order to solve the technical problems of stamping, the precision progressive stamping die technology is continuously explored. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings, the purpose of the present invention is to provide an ultra-precision 180° reverse folding stamping forming process structure which solves the problem that the product is difficult to form after 180° reverse folding, has a novel and practical forming process structure, and ensures stable production capacity.

[0004] In order to achieve the above purpose, one of the technical solutions adopted by the present invention is: an ultra-precision 180° reverse folding stamping process, including step one, making a pre-folding line on the unfolded blank of the product; and also including step two: sequentially performing 45° bending forming, 90° bending forming, 120° bending forming, 170° bending forming, and 180° bending forming on the two parts to be bent of the unfolded blank of the product to finally form the product.

[0005] The beneficial effect of the ultra-precision 180° reverse folding stamping forming process of the present invention is that this forming process structure can realize the continuous production of products; through this ultra-precision 180° reverse folding stamping forming process structure, the technical difficulties in stamping are overcome, its application is greatly improved, and the production efficiency is greatly improved; the performance is better, the functionality and safety are wider; the fatigue resistance and service life are greatly improved.

[0006] Preferably, in step one, a pre-folding line is made on the product unfolded blank by using a pre-folding line making mold, the pre-folding line making mold comprises: a pre-folding upper mold forming mold core and a pre-folding lower fixing module, the product unfolded blank is located between the pre-folding upper mold forming mold core and the pre-folding lower fixing module, two pre-folding lower mold forming mold cores are arranged on the pre-folding lower fixing module, and each of the pre-folding lower mold forming mold cores has a sharp portion at one end facing the product unfolded blank.

[0007] Preferably, in step 2, a 45° bending mold is used to bend the product unfolded blank at 45°, and the 45° bending mold comprises: a 45° upper mold forming mold core and a 45° lower mold forming mold core, and the product unfolded blank is located between the 45° upper mold forming mold core and the 45° lower mold forming mold core, and the 45° lower mold forming mold core is provided with a 45° bending groove, and the 45° upper mold forming mold core is provided with two 45° upper mold forming punches, and one end of each of the 45° upper mold forming punches facing the 45° lower mold forming mold core is a bending plane matching the 45° bending groove.

[0008] Preferably, in step 2, a 90° bending mold is used to bend the product bent at 45° by 90°. The 90° bending mold includes: a 90° upper mold forming mold core and a 90° lower mold forming mold core. The product bent at 45° is located between the 90° upper mold forming mold core and the 90° lower mold forming mold core. Two 90° upper mold forming punches are provided on the 90° upper mold forming mold core. Each of the 90° upper mold forming punches is provided with a 90° bending groove. One end of the 90° upper mold forming punch facing the 90° lower mold forming mold core is an acute-angle step matching the 90° bending groove. Compared with two 90° bending grooves, the 90° forming by the cooperation of the 90° bending groove and the acute-angle step provides a certain degree of fault tolerance and is easy to demould.

[0009] Preferably, in step 2, a 120° bending mold is used to bend the product bent 90° by 120°, and the 120° bending mold comprises: a 120° upper mold forming mold core, and two 120° upper mold forming punches are arranged on the outer side of the 120° upper mold forming mold core; a lower mold middle mold core, and two lower mold side forming mold core seats, and the two lower mold side forming mold core seats are located on both sides of the lower mold middle mold core, and the two lower mold side forming mold core seats are both provided with lower mold side forming mold cores that can slide back and forth in the direction of the lower mold middle mold core; the 1 The 20° upper die forming core corresponds to the lower die middle forming core, the product bent 90° is located between the 120° upper die forming core and the lower die middle forming core, the 120° upper die forming core is used to press the flat part of the product bent 90°, and the end faces corresponding to the lower die side forming core and the lower die middle forming core are provided with matching 30° inclined surfaces; the two 120° upper die forming punches act on the two lower die side forming cores to move toward the lower die middle forming core, and a reset spring is provided between each of the lower die side forming cores and the lower die side forming core seat.

[0010] Preferably, in step 2, a 170° bending mold is used to bend the product bent 120° by 170°, and the 170° bending mold comprises: a 170° upper mold forming mold core and a 170° lower mold forming mold core, and the product bent 120° is located between the 170° upper mold forming mold core and the 170° lower mold forming mold core, and the two ends of the facing end surfaces of the 170° upper mold forming mold core and the 170° lower mold forming mold core form mutually matching first vertical steps, and the bending portion of the product bent 120° is located within the mutually matching first vertical steps.

[0011] Preferably, in step two, a 180° bending mold is used to bend the product bent 120° by 180°, and the 180° bending mold comprises: a 180° upper mold forming mold core and a 180° lower mold forming mold core, and the product bent 120° is located between the 180° upper mold forming mold core and the 180° lower mold forming mold core, and the two ends of the 180° lower fixing module and the 180° lower mold forming mold core match each other to form a second vertical step, and the bending part of the product bent 120° is located in the second vertical step that matches each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a flow chart of this embodiment;

[0013] Figure 2 This is a schematic diagram of the structure of the pre-folding line mold clamping in this embodiment;

[0014] Figure 3 This is a schematic diagram of the structure of the pre-folding line mold opening in this embodiment;

[0015] Figure 4 This is a schematic diagram of the structure of the 45° bending mold clamping in this embodiment;

[0016] Figure 5 This is a schematic diagram of the structure of the 45° bending mold opening in this embodiment;

[0017] Figure 6 This is a schematic diagram of the structure of the 90° bending mold clamping in this embodiment;

[0018] Figure 7 This is a schematic diagram of the structure of the 90° bending mold opening in this embodiment;

[0019] Figure 8 This is a schematic diagram of the structure of the 120° bending mold clamping in this embodiment;

[0020] Fig. 9 This is a schematic diagram of the structure of the 120° bending mold opening in this embodiment;

[0021] Fig.10This is a schematic diagram of the structure of the 170° bending mold clamping in this embodiment;

[0022] Fig.11 This is a schematic diagram of the structure of the 170° bending mold opening in this embodiment;

[0023] Fig.12 This is a schematic diagram of the structure of the 180° bending mold clamping in this embodiment;

[0024] Fig.13 This is a schematic diagram of the structure of the 180° bending mold opening in this embodiment;

[0025] In the figure:

[0026] 10. Pre-folding line mold; 11. Pre-folding upper mold forming mold core; 12. Pre-folding lower fixed module; 13. Pre-folding lower mold forming mold core; 14. Sharp part;

[0027] 20, 45° bending die; 21, 45° upper die forming die core; 22, 45° lower die forming die core; 23, 45° bending groove; 24, 45° upper die forming punch; 25, bending plane;

[0028] 30, 90° bending die; 31, 90° upper die forming die core; 32, 90° lower die forming die core; 33, 90° upper die forming punch; 34, 90° bending groove; 35, acute angle step;

[0029] 40. 120° bending die; 41. 120° upper die forming die core; 42. 120° upper die forming punch; 43. lower die middle forming die core; 44. lower die side forming die core seat; 45. lower die side forming die core; 46. 30° inclined surface; 47. return spring;

[0030] 50, 170° bending mold; 5, 170° upper mold forming mold core; 52, 170° lower mold forming mold core; 53, first vertical step;

[0031] 60, 180° bending die; 61, 180° upper die forming die core; 62, 180° lower die forming die core; 63, second vertical step;

[0032] 70. Product; 71. Bending portion; 72. Flat portion; 73. Product unfolded blank. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0034] See also Figure 1As shown, this embodiment discloses an ultra-precision 180° reverse folding stamping process, including step one, making a pre-folding line on the product unfolded blank 73; and also including step two: sequentially performing 45° bending forming, 90° bending forming, 120° bending forming, 170° bending forming, and 180° bending forming on the two to-be-bent parts 71 of the unfolded blank of the product 70, and finally forming the product 70.

[0035] like Figure 2 , Figure 3 As shown, in step 1, the present embodiment uses a pre-folding line punching die 10 to punch a pre-folding line on the product unfolded blank 73. The pre-folding line punching die 10 includes: a pre-folding upper die forming die core 11, a pre-folding lower fixed module 12, and the product unfolded blank 73 is located between the pre-folding upper die forming die core 11 and the pre-folding lower fixed module 12. Two pre-folding lower die forming die cores 13 are arranged on the pre-folding lower fixed module 12, and each pre-folding lower die forming die core 13 has a sharp portion 14 at one end facing the product unfolded blank 73. With the up and down linear movement of the punch press, under the interaction of the two pre-folding lower die forming die cores 13 arranged on the pre-folding lower fixed module 12, the final product completes the state of punching the product unfolded blank 73 with a pre-folding line, thereby completing Step 1.

[0036] like Figure 4 , Figure 5 As shown, in step two, this embodiment uses a 45° bending mold 20 to bend the product unfolded blank 73 at 45°. The 45° bending mold 20 includes: a 45° upper mold forming mold core 21 and a 45° lower mold forming mold core 22. The product unfolded blank 73 is located between the 45° upper mold forming mold core 21 and the 45° lower mold forming mold core 22. The 45° lower mold forming mold core 22 is provided with a 45° bending groove 23. The 45° upper mold forming mold core 21 is provided with two 45° upper mold forming punches 24. Each 45° upper mold forming punch 24 has an end facing the 45° lower mold forming mold core 22 as a bending plane 25 matching the 45° bending groove 23. As the punch press moves up and down in a straight line, the 45° upper die forming die core 21 presses the product 70 downward, and under the action of the 45° upper die forming punch 24 and the 45° lower die forming die core 22, the bending portion 71 of the final product 70 is folded into a 45° state, thereby completing Step 2.

[0037] like Figure 6 , Figure 7As shown, in step 2, the product 70 bent at 45° is bent at 90° using a 90° bending mold 30, the 90° bending mold 30 includes: a 90° upper mold forming mold core 31 and a 90° lower mold forming mold core 32, the product 70 bent at 45° is located between the 90° upper mold forming mold core 31 and the 90° lower mold forming mold core 32, two 90° upper mold forming punches 33 are arranged on the 90° upper mold forming mold core 31, each 90° upper mold forming punch 33 is provided with a 90° bending groove 34, and one end of the 90° upper mold forming punch 33 facing the 90° lower mold forming mold core 32 is an acute-angle step 35 matching the 90° bending groove 34. As the punch press moves up and down in a straight line, the 90° upper die forming die core 31 presses the product 70 downward, and under the action of the 90° upper die forming punch 33 and the 90° lower die forming die core 32, the bending portion 71 of the final product 70 is bent into a 90° state. Thus, Step 3 is achieved.

[0038] like Figure 8 , Fig. 9 As shown, in step 2, the product 70 bent at 90° is bent at 120° using a 120° bending mold 40, and the 120° bending mold 40 includes:

[0039] A 120° upper die forming die core 41, two 120° upper die forming punches 42 are arranged on the outer side of the 120° upper die forming die core 41;

[0040] A lower mold center molding core 43 and two lower mold side molding core seats 44, the two lower mold side molding core seats 44 are located on both sides of the lower mold center molding core 43, and the two lower mold side molding core seats 44 are each provided with a lower mold side molding core 45 that can slide back and forth toward the lower mold center molding core 43;

[0041] The 120° upper mold forming core 41 corresponds to the lower mold middle forming core 43, and the 90°-bent product 70 is located between the 120° upper mold forming core 41 and the lower mold middle forming core 43. The 120° upper mold forming core 41 is used to press the flat surface 72 of the 90°-bent product 70, and the lower mold side forming core 45 and the end surface corresponding to the lower mold middle forming core 43 are provided with a matching 30° inclined surface 46;

[0042] The two 120° upper die forming punches 42 act on the two lower die side forming mold cores 45 to move toward the lower die middle forming mold core 43 , and a return spring 47 is provided between each lower die side forming mold core 45 and the lower die side forming mold core seat 44 .

[0043] As the punch press moves up and down in a straight line, the 120° upper die forming die core 41 presses the product 70 downward, and under the action of the lower die middle forming die core 43, two lower die side forming die core seats 44 and two 120° upper die forming punches 42, the bending portion 71 of the final product 70 is bent into a 120° state. Thus, Step 4 is completed.

[0044] like Fig.10 , Fig.11 As shown, in step 2, the product 70 bent 120° is bent 170° using a 170° bending die 50, and the 170° bending die 50 includes: a 170° upper die forming die core 51 and a 170° lower die forming die core 52. The product 70 bent 120° is located between the 170° upper die forming die core 51 and the 170° lower die forming die core 52. The two ends of the facing end surfaces of the 170° upper die forming die core 51 and the 170° lower die forming die core 52 form mutually matching first vertical steps 53, and the bending portion 71 of the product 70 bent 120° is located in the mutually matching first vertical steps 53. With the up and down linear movement of the punch press, the 170° upper die forming die core 51 presses the product 70 downward, and with the action of the 170° lower die forming die core 52, the bending portion 71 of the final product 70 is bent into a 170° state, thereby completing Step 5.

[0045] like Fig.12 , Fig.13 As shown, in step 2, the product 70 bent 120° is bent 180° using a 180° bending mold 60, and the 180° bending mold 60 includes: a 180° upper mold forming mold core 61 and a 180° lower mold forming mold core 62, and the product 70 bent 120° is located between the 180° upper mold forming mold core 61 and the 180° lower mold forming mold core 62, and the two ends of the 180° lower fixing module and the 180° lower mold forming mold core 62 match each other to form a second vertical step 63, and the bending portion 71 of the product 70 bent 120° is located in the second vertical step 63 that matches each other.

[0046] As the punch press moves up and down in a straight line, the 180° upper die forming die core 61 presses the product 70 downward, and under the action of the 180° lower die forming die core 62, the bending portion 71 of the final product 70 is folded into a 180° state, thereby completing Step 6.

[0047] In this embodiment, a pre-folding line is first made on the product unfolded blank 73, and then a 45° bend is formed, then a 90° bend is formed, then a 120° bend is formed, then a 170° bend is formed, and finally a 180° bend is formed, so as to finally meet the requirements of the product 70 drawing. This ultra-precision 180° reverse folding stamping forming process structure is a new technological breakthrough and a new technical research and development direction in the field of continuous stamping. This ultra-precision 180° reverse folding forming process structure has a wide range of applications, covering industries such as electronics, medicine, aviation, aerospace, and automobiles. It solves the problem that the product is not easy to be formed after 180° reverse folding, and its forming process structure is relatively novel and practical. Moreover, after the stamping die is maintained, its production capacity can be guaranteed to be stable, and it is easy to promote to products with similar shapes of 180° reverse folding. Because of its safe and reliable performance, easy maintenance, high production capacity, stable quality, and ability to meet the special requirements of stamping products, it is widely used in continuous stamping.

[0048] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultra-precision 180° reverse folding stamping process, comprising step 1, punching a pre-folding line on a product unfolded blank (73); characterized in that: The method further comprises step 2: sequentially bending the two to-be-bent portions (71) of the unfolded blank of the product (70) at 45°, 90°, 120°, 170°, and 180° to finally form the product (70).

2. The ultra-precision 180° reverse bending stamping process according to claim 1 is characterized in that: In step one, a pre-folding line is formed on a product unfolded blank (73) using a pre-folding line forming mold (10), the pre-folding line forming mold (10) comprising: a pre-folding upper mold forming mold core (11), and a pre-folding lower fixing module (12), the product unfolded blank (73) is located between the pre-folding upper mold forming mold core (11) and the pre-folding lower fixing module (12), and two pre-folding lower mold forming mold cores (13) are arranged on the pre-folding lower fixing module (12), and each of the pre-folding lower mold forming mold cores (13) has a sharp portion (14) at one end facing the product unfolded blank (73).

3. The ultra-precision 180° reverse bending stamping process according to claim 1, characterized in that: In step 2, a 45° bending die (20) is used to bend the product unfolded blank (73) at 45°. The 45° bending die (20) comprises: a 45° upper die forming die core (21) and a 45° lower die forming die core (22). The product unfolded blank (73) is located between the 45° upper die forming die core (21) and the 45° lower die forming die core (22). The 45° lower die forming die core (22) is provided with a 45° bending groove (23). The 45° upper die forming die core (21) is provided with two 45° upper die forming punches (24). One end of each of the 45° upper die forming punches (24) facing the 45° lower die forming die core (22) is a bending plane (25) matching the 45° bending groove (23).

4. The ultra-precision 180° reverse bending stamping process according to claim 1, characterized in that: In step 2, a 45°-bent product (70) is bent 90° using a 90° bending die (30), wherein the 90° bending die (30) comprises: a 90° upper die forming die core (31) and a 90° lower die forming die core (32), wherein the 45°-bent product (70) is located between the 90° upper die forming die core (31) and the 90° lower die forming die core (32), wherein the 90° upper die forming die core (31) is provided with two 90° upper die forming punches (33), each of the 90° upper die forming punches (33) is provided with a 90° bending groove (34), and one end of the 90° upper die forming punch (33) facing the 90° lower die forming die core (32) is an acute-angle step (35) matching the 90° bending groove (34).

5. The ultra-precision 180° reverse bending stamping process according to claim 1 is characterized in that: In step 2, the product (70) bent at 90° is bent at 120° using a 120° bending mold (40), wherein the 120° bending mold (40) comprises: A 120° upper die forming die core (41), wherein two 120° upper die forming punches (42) are arranged on the outer side of the 120° upper die forming die core (41); A lower mold center molding core (43) and two lower mold side molding core seats (44), wherein the two lower mold side molding core seats (44) are located on both sides of the lower mold center molding core (43), and the two lower mold side molding core seats (44) are each provided with a lower mold side molding core (45) that can slide back and forth in the direction of the lower mold center molding core (43); The 120° upper mold forming core (41) corresponds to the lower mold middle mold core (43); the 90°-bent product (70) is located between the 120° upper mold forming core (41) and the lower mold middle mold core (43); the 120° upper mold forming core (41) is used to press the flat surface (72) of the 90°-bent product (70); and the end surfaces corresponding to the lower mold side forming core (45) and the lower mold middle mold core (43) are provided with matching 30° inclined surfaces (46); The two 120° upper die forming punches (42) act on the two lower die side forming mold cores (45) to move toward the lower die middle forming mold core (43), and a return spring (47) is arranged between each lower die side forming mold core (45) and the lower die side forming mold core seat (44).

6. The ultra-precision 180° reverse bending stamping process according to claim 1, characterized in that: In step 2, a 170° bending mold (50) is used to bend the product (70) bent at 120° by 170°, wherein the 170° bending mold (50) comprises: a 170° upper mold forming mold core (51) and a 170° lower mold forming mold core (52), wherein the product (70) bent at 120° is located between the 170° upper mold forming mold core (51) and the 170° lower mold forming mold core (52), and mutually matching first vertical steps (53) are formed at both ends of the facing end surfaces of the 170° upper mold forming mold core (51) and the 170° lower mold forming mold core (52), and the bending portion (71) of the product (70) bent at 120° is located within the mutually matching first vertical steps (53).

7. The ultra-precision 180° reverse bending stamping process according to claim 1, characterized in that: In step 2, a 180° bending mold (60) is used to bend the product (70) bent 120° by 180°, wherein the 180° bending mold (60) comprises: a 180° upper mold forming mold core (61) and a 180° lower mold forming mold core (62), the product (70) bent 120° is located between the 180° upper mold forming mold core (61) and the 180° lower mold forming mold core (62), the two ends of the 180° lower fixing module matching the 180° lower mold forming mold core (62) form a second vertical step (63) that matches each other, and the bending portion (71) of the product (70) bent 120° is located within the second vertical step (63) that matches each other.

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