Inner and outer circumference ring forming structure

Abstract

The utility model provides an inner and outer circumference ring forming structure. The inner and outer circumference ring forming structure comprises an upper die assembly and a lower die assembly arranged under the upper die assembly. An inner stripping plate is arranged in the upper die assembly, the outer side of the inner stripping plate is sleeved with an upper die plate, and the bottom of the upper die plate extends in the direction away from the inner stripping plate. A positioning pin and a hole flanging male die are coaxially arranged in the lower die assembly corresponding to the inner stripping plate, a lower floating block is arranged corresponding to the upper die plate and used for containing a product working procedure piece, and a lower die plate is further installed on the outer side of the lower floating block. A forming cavity of a product working procedure piece is formed among the hole flanging male die, the lower die plate, the lower floating block and the lower die plate, the top of the hole flanging male die is accurately aligned with the inner stripper plate through the positioning pin, inner hole flanging and appearance flanging are completed at the same time on the basis that the coaxiality of the inner ring and the outer ring is guaranteed, the production size of a part is stabilized, and the production efficiency is improved. Development and application of multiple dies are saved, the die cost is effectively reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of hole punching, in particular to the technical field of multi-circular ring forming, and specifically to an inner and outer peripheral ring forming structure. Background Art

[0002] In the stamping production process, there will be some products that require forming two products with different diameters, which will require the processing of holes of different heights. Conventional molds cannot directly produce multi-ring structures and can only be achieved through multi-pass molds. This not only increases the number of processes and costs, but also greatly reduces production efficiency, which has a great impact on the company's production time and production costs. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an inner and outer peripheral ring forming structure to solve the difficulties of the prior art.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides an inner and outer peripheral ring forming structure, comprising an upper mold assembly and a lower mold assembly disposed directly below the upper mold assembly;

[0005] An inner stripping plate 8 is provided in the upper mold assembly, and an upper mold plate 9 is sleeved on the outer side of the inner stripping plate 8. The bottom of the upper mold plate 9 extends in a direction away from the inner stripping plate 8, and a molding structure of the product process part 24 is preset on the bottom, inner side and outer side;

[0006] A positioning pin 19 and a punch 18 are coaxially arranged in the lower mold assembly corresponding to the inner stripping plate 8. A lower floating block 14 is provided corresponding to the upper mold plate 9 and is used to place the product process parts 24. A lower mold plate 12 is also installed on the outer side of the lower floating block 14.

[0007] When the upper mold assembly and the lower mold assembly are closed, the inner hole flange of the product process part 24 is formed between the hole-flanging punch 18 and the upper mold plate 9, and the outer shape flange of the product process part 24 is formed between the upper mold plate 9, the lower mold plate 12 and the lower floating block 14.

[0008] According to the preferred embodiment, when the upper mold assembly and the lower mold assembly are closed, a molding cavity for the product process part 24 is formed between the punch 18 , the lower mold plate 12 , the lower floating block 14 , and the lower mold plate 12 .

[0009] According to the preferred solution, the upper mold assembly is provided with an upper mold base 1 and an upper mold plate 9 in sequence from top to bottom;

[0010] An upper foot 6 is installed on the top of the upper die base 1, and a No. 2 nitrogen spring 7 passing through the upper die base 1 is installed through the upper foot 6. The bottom of the No. 2 nitrogen spring 7 is connected to an inner stripping plate 8;

[0011] An upper stripping plate 4 located outside the upper die base 1 is further provided below the upper die base 1 through an extension unit.

[0012] According to the preferred embodiment, the extension unit includes a contour sleeve 3 and an extension sleeve 2 , wherein the extension sleeve 2 is installed in the upper die base 1 , and the contour sleeve 3 passes through the bottom of the extension sleeve 2 and is connected to the upper stripping plate 4 .

[0013] According to a preferred embodiment, the upper stripping plate 4 is installed on the upper die base 1 through a plurality of extension units.

[0014] According to the preferred embodiment, the lower mold assembly is provided with a lower mold plate 12, a lower pad 16, a lower mold base 17 and a lower pad 20 in sequence from top to bottom;

[0015] The bottom of the punch 18 is mounted on the lower die base 17, and a positioning pin 19 is mounted on the top of the punch 18.

[0016] The sleeved lower floating block 14 is arranged in the lower template 12 and the lower pad 16, and the bottom is connected to the lower contour sleeve 15.

[0017] According to the preferred embodiment, an upper limit column 10 and an outer guide column 11 are installed below the upper die base 1 , and a lower limit column 22 and an outer guide sleeve 23 are installed on the upper die base 17 accordingly.

[0018] According to the preferred embodiment, an alignment groove is provided at one end of the inner stripping plate 8 close to the lower die assembly, corresponding to the positioning pin 19 .

[0019] According to a preferred embodiment, the top of the positioning pin 19 is arranged in an arc-shaped structure.

[0020] According to the preferred embodiment, the lower template 12 is further provided with an inner limit 13 whose top protrudes from the upper surface of the lower template 12;

[0021] When the upper mold assembly moves toward the lower mold assembly, after the upper stripping plate 4 reaches the bottom dead center, the top of the inner limit 13 is abutted against the bottom of the upper stripping plate 4.

[0022] According to the preferred embodiment, a No. 1 nitrogen spring 5 is connected to the bottom of the upper die base 1 and is supported on the upper stripping plate 4;

[0023] A No. 3 nitrogen spring 21 is provided below the lower floating block 14 and is installed through the lower die base 17 . The No. 3 nitrogen spring 21 is installed in the lower pad foot 20 .

[0024] The utility model utilizes the flanging punch, the lower template, the lower floating block and the lower template to form a forming cavity of the product process part, and the top of the flanging punch is accurately aligned with the inner stripping plate through the positioning pin, thereby ensuring the coaxiality of the inner and outer rings, and completing the inner hole flanging and the outer shape flanging at the same time, stabilizing the production size of the parts, saving the development and application of multiple molds, effectively reducing the mold cost and improving production efficiency.

[0025] The following will describe in more detail the best embodiments of the present invention in conjunction with the accompanying drawings so that the features and advantages of the present invention can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shown is a schematic diagram of the structure of the utility model;

[0027] Figure 2 Shown is a top view of the partial structure of the utility model;

[0028] Figure 3 Shown is a top view of the present invention;

[0029] Label Description

[0030] 1. Upper die base; 2. Extension sleeve; 3. Upper contour sleeve; 4. Upper stripper plate; 5. Nitrogen spring; 6. Upper pad; 7. Nitrogen spring; 8. Inner stripper plate; 9. Upper template; 10. Upper limit pin; 11. Outer guide pin; 12. Lower template; 13. Inner limit pin; 14. Lower floating block; 15. Lower contour sleeve; 16. Lower pad; 17. Lower die base; 18. Flanging punch; 19. Locating pin; 20. Lower pad; 21. Nitrogen spring; 22. Lower limit pin; 23. Outer guide sleeve; 24. Product process parts. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Compared to the embodiments shown in the drawings, feasible embodiments within the scope of protection of the present invention may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0033] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the specification and claims of the present utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not necessarily indicate a quantity limitation. Words such as "include" or "comprising" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] The utility model provides an inner and outer peripheral ring forming structure for use in a stamping process. The utility model does not limit the type of parts, but the inner and outer peripheral ring forming structure is particularly suitable for products with requirements for the coaxiality of the inner and outer rings.

[0035] In general, the inner and outer peripheral ring forming structure proposed by the present invention mainly includes an upper mold assembly and a lower mold assembly arranged directly below the upper mold assembly. Figure 1 , which shows the arrangement relationship between the upper mold assembly and the lower mold assembly.

[0036] In order to achieve the purpose of forming inner and outer peripheral rings in the same mold, and to solve the problem in the background technology that in the stamping production process, there will be a part of products that require forming two different diameters, which will require processing of holes of different heights. Conventional molds cannot directly make multi-ring structures and can only be achieved through multi-channel molds. This not only increases the number of processes and costs, but also greatly reduces production efficiency, which has a great impact on the production time and production costs of the enterprise. For this reason, in the technical solution provided by this embodiment, a forming cavity for the product process part 24 is formed between the hole-turning punch 18, the lower template 12, the lower floating block 14, and the lower template 12, and the top of the hole-turning punch 18 is precisely aligned with the inner stripping plate 8 through the positioning pin 19, which ensures the coaxiality of the inner and outer rings, and completes the inner hole flanging and the outer shape flanging at the same time, stabilizes the production size of the parts, saves the development and application of multi-channel molds, effectively reduces the mold cost, and improves production efficiency.

[0037] Specifically, such as Figure 1As shown, the upper mold assembly is provided with an upper mold base 1 and an upper mold base 1 in sequence from top to bottom. The upper mold base 1 is sleeved on the outside of the middle inner stripping plate 8, wherein the top of the inner stripping plate 8 is installed on the upper pad 6 through the No. 2 nitrogen spring 7, and the No. 2 nitrogen spring 7 passes through the upper mold base 1 and is connected to the upper pad 6 installed on the top of the upper mold base 1.

[0038] A stripping structure is also provided in the upper mold assembly. Due to the large height difference between the inner hole and the outer flange structure of the product process part provided in this embodiment, the contour sleeve 3 of the conventional structure cannot meet the installation requirements of the upper stripping plate 4. For this reason, the upper stripping plate 4 is installed on the outer side of the upper mold base 1 through extension units in multiple symmetrical directions below the upper mold base 1 to ensure stability during stripping. Next, the extension unit includes a contour sleeve 3 and an extension sleeve 2. The extension sleeve 2 is installed in the upper mold base 1 and is connected to the upper stripping plate 4 through the contour sleeve 3 through the bottom of the extension sleeve 2 to compensate for the height difference between the upper mold base 1 and the upper stripping plate 4.

[0039] Next, the lower mold plate 12, the lower pad 16, the lower mold base 17 and the lower pad 20 are arranged in sequence from top to bottom in the lower mold assembly. A hole-turning punch 18 is coaxially arranged in the lower mold plate 12 and the lower pad 16 corresponding to the inner stripping plate 8. The bottom of the hole-turning punch 18 is installed on the lower mold base 17. The upper mold base 1 corresponding to the outer side of the inner stripping plate 8 on the upper mold assembly is provided with a lower floating block 14 sleeved on the outer side of the hole-turning punch 18, and the bottom of the lower floating block 14 is connected to the lower contour sleeve 15.

[0040] It should be specifically explained that, since the product process part 24 provided in this embodiment needs to be flanged not only for the inner hole but also for the outer shape, and the molding structure of the product process part 24 needs to be completed by multiple components, when the upper mold assembly and the lower mold assembly are molded, a molding cavity for the product process part 24 is formed between the hole-flanging punch 18, the lower mold plate 12, the lower floating block 14, and the lower mold plate 12, the inner hole flange of the product process part 24 is formed between the hole-flanging punch 18 and the upper mold plate 9, and the outer shape flange of the product process part 24 is formed between the upper mold plate 9, the lower mold plate 12, and the lower floating block 14. Therefore, the alignment accuracy requirements between the structures in the mold are very high. To this end, the following designs are made:

[0041] On the one hand, a locating pin 19 is installed on the top of the hole-turning punch 18 in the lower mold assembly, and a positioning groove is provided on the corresponding inner stripping plate 8 in the upper mold assembly at one end close to the lower mold assembly, which ensures the coaxiality of the middle position when the upper mold assembly moves toward the lower mold assembly. In addition, the top of the locating pin 19 is arranged in an arc-shaped structure to avoid damage to the positioning groove during multiple mold closing and opening processes, thereby avoiding the occurrence of a situation that affects the accuracy.

[0042] On the other hand, the lower template 12 is also equipped with an inner limit 13 whose top protrudes from the upper surface of the lower template 12; when the upper mold assembly moves toward the lower mold assembly, after the upper stripping plate 4 reaches the bottom dead center, the top of the inner limit 13 is abutted against the lower surface of the upper stripping plate 4;

[0043] In addition, an upper limit column 10 and an outer guide column 11 are installed below the upper mold base 1, and a lower limit column 22 and an outer guide sleeve 23 are correspondingly installed on the upper mold base 17 to form an external guide between the upper mold assembly and the lower mold assembly.

[0044] On this basis, it is also taken into consideration to facilitate the demolding of the product process part 24, avoid the inner hole and outer hole structure being stuck in the mold, and at the same time avoid damage to the product process part 24. For this reason, the lower part of the upper mold base 1 is connected to a No. 1 nitrogen spring 5 that is resting on the upper stripping plate 4. The upper stripping plate 4 can push the outer structure of the product process part 24 downward under the action of the nitrogen spring 5 force; similarly, a No. 3 nitrogen spring 21 installed through the lower mold base 17 is provided below the lower floating block 14. The No. 3 nitrogen spring 21 is installed in the lower pad 20. The lower floating block 14 can push the product process part 24 upward from the lower template 12 under the action of the nitrogen spring 21 force; in addition, the inner stripping plate 8 pushes the inner structure of the product process part 24 downward under the action of the No. 2 nitrogen spring 7.

[0045] In use, this embodiment includes the following process steps:

[0046] S1: During punching, the power device drives the punch slide to lift the upper die as a whole, separating the upper die assembly from the lower die assembly;

[0047] S2: At this time, the product process part 24 is placed on the lower floating block 14 and positioned using the positioning pin 19;

[0048] S3: The upper die assembly moves vertically downward under the action of the power device and the punch slide, and the outer guide pin 11 enters the outer guide sleeve 23 to complete the guidance of the die;

[0049] S4: The upper mold assembly continues to move downward as a whole, and the upper stripping plate 4 contacts the upper surface of the inner limit 13, and the height position of the upper stripping plate 4 is limited. Thereafter, the upper stripping plate 4 no longer moves downward with the upper mold;

[0050] S5: The upper mold assembly continues to move downward, the upper mold plate 9 presses the upper surface of the product process part 24, and the lower floating block 14 presses the lower surface of the process part 24 under the action of the nitrogen spring 21;

[0051] S6: Continue to move downward, the upper template 9 presses the product process part 24 to drive the lower contour sleeve 15 and the nitrogen spring 21 to move downward together, and then the flanging punch 18 enters the internal cavity of the upper template 9 to complete the inner hole flanging, and at the same time, the outer shape of the upper template 9 enters the lower template 12 to complete the outer shape flanging;

[0052] S7: Finally, the lower floating block 14 contacts and locks with the upper surface of the lower die base 17; the lower surface of the upper limit post 10 contacts and locks with the upper surface of the lower limit post 22. At this time, the upper die reaches the bottom dead center and the product molding is completed.

[0053] S8: After the stamping is completed, the upper mold moves upward under the action of the power device to separate the upper mold assembly from the lower mold assembly. At the same time, the lower floating block 14 pushes the product process part 24 upward from the lower mold plate 12 under the action of the force of the nitrogen spring 21, and then the inner stripping plate 8 pushes the inner shape of the product process part 24 downward under the action of the nitrogen spring 7. At the same time, the upper stripping plate 4 pushes the outer shape of the product process part 24 downward under the action of the nitrogen spring 5. At this time, all components of the upper and lower molds of the mold return to their initial positions, the parts are taken out, and the next stamping process can be carried out.

[0054] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. An inner and outer circumferential ring forming structure, characterized in that: It includes an upper mold assembly and a lower mold assembly arranged directly below the upper mold assembly; An inner stripping plate (8) is provided in the upper mold assembly, and an upper mold plate (9) is sleeved on the outer side of the inner stripping plate (8). The bottom of the upper mold plate (9) extends in a direction away from the inner stripping plate (8), and a molding structure of a product process part (24) is preset on the bottom, inner side and outer side. A positioning pin (19) and a punch (18) are coaxially arranged in the lower die assembly corresponding to the inner stripping plate (8); a lower floating block (14) is arranged corresponding to the upper die plate (9) and is used to place the product process parts (24); a lower die plate (12) is also installed on the outer side of the lower floating block (14); When the upper mold assembly and the lower mold assembly are closed, an inner hole flange of the product process part (24) is formed between the hole-flanging punch (18) and the upper mold plate (9), and an outer shape flange of the product process part (24) is formed between the upper mold plate (9), the lower mold plate (12) and the lower floating block (14).

2. The inner and outer circumferential ring forming structure according to claim 1, characterized in that: The upper die assembly is provided with an upper die base (1) and an upper die plate (9) in sequence from top to bottom; An upper pad (6) is installed on the top of the upper die base (1), and a No. 2 nitrogen spring (7) passing through the upper die base (1) is installed through the upper pad (6), and an inner stripping plate (8) is connected to the bottom of the No. 2 nitrogen spring (7); An upper stripping plate (4) located outside the upper mold plate (9) is further provided below the upper mold base (1) through an extension unit.

3. The inner and outer circumferential ring forming structure according to claim 2, characterized in that: The extension unit comprises a contour sleeve (3) and an extension sleeve (2), wherein the extension sleeve (2) is installed in the upper die base (1), and the contour sleeve (3) passes through the bottom of the extension sleeve (2) and is connected to the upper stripping plate (4).

4. The inner and outer circumferential ring forming structure according to claim 3, characterized in that: The lower die assembly is provided with a lower die plate (12), a lower pad (16), a lower die base (17) and a lower pad (20) in sequence from top to bottom; The bottom of the hole-turning punch (18) is installed on the lower die base (17), and a positioning pin (19) is installed on the top of the hole-turning punch (18); The sleeved lower floating block (14) is arranged in the lower template (12) and the lower pad (16), and the bottom is connected with a lower contour sleeve (15).

5. The inner and outer circumferential ring forming structure according to claim 4, characterized in that: An alignment groove is provided at one end of the inner stripping plate (8) close to the lower die assembly, corresponding to the positioning pin (19).

6. The inner and outer circumferential ring forming structure according to claim 5, characterized in that: The lower template (12) is also provided with an inner limiter (13) whose top protrudes from the upper surface of the lower template (12); When the upper die assembly moves toward the lower die assembly, after the upper stripping plate (4) reaches the lower dead point, the top of the inner limit (13) is abutted against the lower portion of the upper stripping plate (4).

7. The inner and outer circumferential ring forming structure according to claim 6, characterized in that: A nitrogen spring (5) is connected below the upper die seat (1) and is supported against the upper stripping plate (4); A No. 3 nitrogen spring (21) is provided below the lower floating block (14) and is installed through the lower die base (17). The No. 3 nitrogen spring (21) is installed in the lower pad foot (20).

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