A thick material hole flanging and chamfering forming die structure
By designing a chamfering and forming mold structure for thick materials, the problems of processing difficulty and high cost in thick material chamfering and forming were solved, achieving consistency in chamfer dimensions and stability in product quality, thereby improving production efficiency and market competitiveness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI CHEN CHANG EXACT MOULD CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-06-19
AI Technical Summary
Existing molds are difficult to process, have large errors, and have high production costs when forming holes in thick materials. In particular, the chamfer dimensions are inconsistent after the holes are formed, and the mold needs to be adjusted according to different batches of materials.
A thick material flanging and chamfering forming mold structure was designed, including an upper mold and a lower mold. The flanging punch and the chamfering die are combined to complete flanging and chamfering in one forming process. The processing efficiency and accuracy are improved by optimizing the mold structure.
It achieves dimensional consistency in the chamfering of thick materials, reduces production costs, improves product quality and production efficiency, and simplifies the mold debugging process.
Smart Images
Figure CN224372567U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of progressive die processing technology, and in particular to a thick material flanging and chamfering forming die structure. Background Technology
[0002] Progressive dies are currently among the most advanced types of dies used in manufacturing. They combine multiple dies and integrate the functions of several single-operation dies, enabling continuous automated production of multiple processes. They offer advantages such as high processing quality, high production efficiency, and low operator requirements, representing a major direction in die design development. For example... Figure 1 The spring bracket product shown has two sets of chamfered boss through holes. Traditional processing involves multiple steps: first, flanging the holes, then shaping and chamfering. During flanging, the material is compressed and deformed, increasing its hardness. After cooling and hardening, the material becomes even harder, making chamfering very difficult. Furthermore, thick materials often exhibit inconsistent chamfer dimensions after flanging, requiring mold adjustments based on different batches. This not only compromises product quality but also increases production costs. Therefore, a mold structure for chamfering thick materials is needed. Utility Model Content
[0003] The purpose of this invention is to provide a thick material flanging and chamfering forming mold structure that can be used in progressive dies, solving the problems of high processing difficulty, large processing error and high production cost when using existing molds to form thick materials with flanging.
[0004] The technical solution adopted by this utility model to solve its technical problem is:
[0005] A thick material chamfering and forming mold structure includes an upper mold, an upper unloading structure, and a lower mold. A chamfering punch is fixedly connected to the upper mold, and the outer diameter of the chamfering punch is adapted to the inner diameter of the through hole on the product blank. A chamfering and forming die is fixedly connected to the lower mold, and the inner diameter of the chamfering and forming die is adapted to the outer diameter of the convex ring on the product blank. A second chamfer is provided on the inner sidewall of the chamfering and forming die at a position relative to the first chamfer on the convex ring.
[0006] Preferably, in conjunction with the above scheme, an unloading plate insert is fixedly connected to the upper unloading structure, and the piercing punch passes through the unloading plate insert and is movably connected to the unloading plate insert; the lower end face of the unloading plate insert and the upper end face of the piercing chamfering die are respectively used to press the upper end face and the lower end face of the product blank.
[0007] Preferably, in conjunction with the above scheme, the upper unloading structure includes an upper unloading back plate and an upper unloading plate, wherein the unloading plate insert is fixedly connected to the upper unloading back plate.
[0008] Preferably, in conjunction with the above scheme, the upper mold is provided with an upper unloading spring for pushing open the upper unloading structure, and the lower end of the upper unloading spring abuts against the upper end of the upper unloading back plate.
[0009] Preferably, in conjunction with the above scheme, the upper mold includes an upper mold base, and an upper pad and an upper fixing plate that are sequentially stacked and fixed below the upper mold base, and the piercing punch is fixedly connected to the upper fixing plate.
[0010] Preferably, in conjunction with the above scheme, the lower mold includes a lower support plate, and a lower pad, a lower mold base, a lower pad plate, and a concave template that are sequentially stacked and fixed above the lower support plate; the chamfering and turning concave mold is fixedly connected in the concave template.
[0011] Preferably, in conjunction with the above scheme, a die-cutting block is fixedly connected to the die-cutting template, and the chamfering die is fixedly disposed in the die-cutting block.
[0012] Preferably, in conjunction with the above scheme, the lower mold is provided with a first lower unloading structure, the first lower unloading structure includes a lower ejector, a first lower unloading spring disposed below the lower ejector, the lower ejector is movably disposed in the chamfering and reaming die, and the first lower unloading spring is fixedly connected to the lower pad.
[0013] Preferably, in conjunction with the above scheme, the first unloading structure further includes a lower ejector rod and a lower pad block arranged sequentially below the lower ejector. The lower ejector rod is movably disposed in the chamfering die, the lower pad plate, and the lower die base. The lower pad block is movably disposed in the lower die base, and the lower end of the lower pad block abuts against the first unloading spring.
[0014] Preferably, in conjunction with the above scheme, the lower mold is provided with a second lower unloading structure, the second lower unloading structure including a floating guide pin and a second lower unloading spring arranged sequentially below the floating guide pin; the floating guide pin is movably connected in the concave template, the lower pad plate and the lower mold base, and the second lower unloading spring is limited in the lower mold base.
[0015] The beneficial effects of this utility model are as follows: This utility model provides a thick material flanging and chamfering forming mold structure, which can be applied to progressive dies. Because its flanging and chamfering structures can be formed in one step, it effectively solves the problems of inconsistent chamfering dimensions after thick material flanging and the difficulties in mold adjustment caused by different batches of material. By optimizing the mold structure, production efficiency is improved, product quality requirements are guaranteed, production costs are reduced, and market competitiveness is enhanced.
[0016] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0017] Figure 1 This is a structural diagram of the product in this utility model.
[0018] Figure 2 This is a partial structural cross-sectional view of the product in this utility model.
[0019] Figure 3 This is a closed-state sectional view of a thick material chamfering and forming mold structure according to the present invention.
[0020] Figure 4 This is a cross-sectional view of the open state of a thick material chamfering and forming mold structure according to the present invention.
[0021] Figure 5 This is an enlarged view of the chamfered hole structure in this utility model.
[0022] Figure 6 This is a cross-sectional view of the chamfering die for hole turning in this utility model.
[0023] Figure 7 This is a diagram showing the strip layout of the progressive die used in this invention. Detailed Implementation
[0024] Such as 1 and Figure 2 The product structure diagram shown requires the use of the mold of this utility model to punch through holes 11 on the product blank and form a convex ring 12 with a first chamfer 121.
[0025] like Figure 3 and Figure 6 The illustrated thick-material chamfering and forming mold structure includes an upper mold 10, an upper unloading structure 20, and a lower mold 30. A chamfering punch 401 is fixedly connected to the upper mold 10, and the outer diameter of the chamfering punch 401 is adapted to the inner diameter of the through hole 11 on the product blank. A chamfering and forming die 501 is fixedly connected to the lower mold 30, and the inner diameter of the chamfering and forming die 501 is adapted to the outer diameter of the raised ring 12 on the product blank. A second chamfer 5011 is provided on the inner sidewall of the chamfering and forming die 501 at a position opposite to the first chamfer 121 on the raised ring 12. With this structure, a raised ring 12 can be formed downwards at the through hole 11 of the product, and simultaneously a first chamfer 121 can be formed at the lower end of the outer sidewall of the raised ring 12. Figure 3 and Figure 4 This is a cross-sectional view of the material strip 1 corresponding to the mold along its length (i.e., the direction of material strip travel).
[0026] To facilitate unloading using the upper unloading structure 20 and to facilitate pressing the product blank 1 using the chamfering and piercing die 501, an unloading plate insert 402 is fixedly connected to the upper unloading structure 20. The chamfering punch 401 passes through the unloading plate insert 402 and is movably connected to it. The lower end face of the unloading plate insert 402 and the upper end face of the chamfering and piercing die 501 are used to press the upper and lower end faces of the product blank 1, respectively.
[0027] To facilitate the assembly of parts, the upper unloading structure 20 includes an upper unloading back plate 201 and an upper unloading plate 202, with the unloading plate insert 402 fixedly connected to the upper unloading back plate 201. The upper unloading structure 20 can be connected to the upper mold 10 via a hanging plate.
[0028] To facilitate flexible unloading, the upper mold 10 is provided with an upper unloading spring 701 for pushing open the upper unloading structure 20. The lower end of the upper unloading spring 701 abuts against the upper end of the upper unloading back plate 201.
[0029] To facilitate the assembly of the various parts in the upper mold 10, the upper mold 10 includes an upper mold base 101, and an upper pad 102 and an upper fixing plate 103 that are stacked and fixed below the upper mold base 101 in sequence. The piercing punch 401 is fixedly connected to the upper fixing plate 103.
[0030] To facilitate the assembly of the various parts in the lower mold 30, the lower mold 30 includes a lower support plate 305, and a lower pad 304, a lower mold base 303, a lower pad plate 302, and a concave mold plate 301 that are sequentially stacked and fixed on top of the lower support plate 305; the chamfering and turning concave mold 501 is fixedly connected in the concave mold plate 301.
[0031] To facilitate the assembly and positioning of the chamfering die 501, a die pressing block 502 is fixedly connected to the die template 301, and the chamfering die 501 is fixedly disposed in the die pressing block 502.
[0032] To facilitate the upward ejection of the product blank during mold opening, the lower mold 30 is provided with a first lower unloading structure. The first lower unloading structure includes a lower ejector 601 and a first lower unloading spring 604 disposed below the lower ejector 601. The lower ejector 601 is movably disposed in the chamfering and embellishing die 501, and the first lower unloading spring 604 is fixedly connected to the lower pad 304.
[0033] To facilitate processing and maintenance of parts, the first unloading structure also includes a lower ejector rod 602 and a lower pad block 603 arranged sequentially below the lower ejector 601. The lower ejector rod 602 is movably disposed in the chamfering die 501, the lower pad plate 302 and the lower die base 303. The lower pad block 603 is movably disposed in the lower die base 303, and the lower end of the lower pad block 603 abuts against the first unloading spring 604.
[0034] To facilitate the upward ejection of the strip material during mold opening, the lower mold 30 is provided with a second lower unloading structure. The second lower unloading structure includes a floating guide pin 801 and a second lower unloading spring 802 arranged sequentially below the floating guide pin 801. The floating guide pin 801 is movably connected to the concave mold plate 301, the lower pad plate 302, and the lower mold base 303. The second lower unloading spring 802 is limited and arranged in the lower mold base 303.
[0035] like Figure 7 As shown, in order to process as Figure 1 The product described above has its entire processing flow divided into 18 workstations, from g1 to g18. The progressive die for machining thick-material products, arranged from front to back along the feeding direction, includes: punching guide hole station g01, cutting outline station g02, cutting outline station g03, deburring station g04, bending station g05, bending station g06, shaping station g07, bending station g08, bending station g09, shaping station g10, punching station g11 (performing preliminary punching at the corresponding through hole 11), fine punching station g12 (performing fine punching at the corresponding through hole 11), chamfering station g13 (performing preliminary chamfering in the hole to prevent cracking during hole turning), hole turning station g14 (performing hole turning and chamfering simultaneously to form a convex ring 12 with a first chamfer 121), chamfering station g15 (chamfering the lower end of the inner sidewall of the convex ring 12), shaping station g16, punching station g17, and cutting station g18. Ten empty stations are set up in the entire process. The main purpose of the empty stations is to improve the strength of the mold parts and provide sufficient space for the design of mold parts in each station. At the same time, it also facilitates the replacement of vulnerable mold parts and mold maintenance. Through these 18 stations, the continuous stamping process of the entire product is completed. The focus of this utility model is the chamfering mold structure on the g14 chamfering station. A convex ring 12 is formed downward at the through hole 11, and a chamfer is formed at the lower end of the outer side wall of the convex ring 12.
[0036] The working principle of this utility model:
[0037] When the product blank after the previous process enters the chamfering station between the upper unloading structure 20 and the lower die 30 along with the strip 1, the upper die 10 drives the upper unloading structure 20 to press down together. At this time, the upper unloading plate 202 is affected by the force of the upper unloading spring 701 (nitrogen spring) and drives the unloading plate insert 402 to press down the strip 1. The punch continues to press down, and the chamfering punch 401 punches towards the material of the strip 1. The material is squeezed downward by the chamfering punch 401. The material comes into contact with the ejector 601. The ejector 601 drives the lower ejector rod 602 and the lower pad block 603 to move downward together. The first lower unloading spring 604 is compressed by force. The chamfering punch 401 gradually enters the chamfering die 501 and reaches the limit position, completing the chamfering and beveling action.
[0038] Finally, the punch press drives the upper die 10 to move upward, and the ejector 601 ejects the product blank out of the chamfering die 501 through the spring force. The floating guide pin 801 also lifts the strip 1 through the spring force. Finally, the strip 1 carries the product blank after the chamfering is completed and sends it to the next station.
[0039] The mold structure of this utility model changes the traditional piercing die structure. When the piercing punch 401 moves downward, the raw material is subjected to force and expands downward. The side wall of the material is tightly fitted with the inner side wall of the piercing chamfer die 501. Since the material is squeezed outward during piercing, the material thickness at the opening does not change much. During extrusion, there is enough material at the opening to form the chamfer, making the chamfer forming easier and the dimensions more stable.
[0040] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture shown in the accompanying drawings. If the specific posture changes, the directional indicator will also change accordingly.
[0041] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or any direct application to other situations without modification, fall within the protection scope of the present invention.
Claims
1. A thick material chamfering and forming mold structure, comprising an upper mold (10), an upper unloading structure (20), and a lower mold (30), characterized in that, The upper mold (10) is fixedly connected to a piercing punch (401), the outer diameter of which is adapted to the inner diameter of the through hole (11) on the product blank; the lower mold (30) is fixedly connected to a piercing chamfering die (501), the inner diameter of which is adapted to the outer diameter of the convex ring (12) on the product blank; a second chamfer (5011) is provided on the inner side wall of the piercing chamfering die (501) at a position relative to the first chamfer (121) on the convex ring (12).
2. The thick material flanging and chamfering forming mold structure according to claim 1, characterized in that, The upper unloading structure (20) is fixedly connected to an unloading plate insert (402), and the piercing punch (401) passes through the unloading plate insert (402) and is movably connected to the unloading plate insert (402); the lower end face of the unloading plate insert (402) and the upper end face of the piercing chamfering die (501) are respectively used to press the upper end face and lower end face of the product blank (1).
3. The thick material flanging and chamfering forming mold structure according to claim 2, characterized in that, The upper unloading structure (20) includes an upper unloading back plate (201) and an upper unloading plate (202), and the unloading plate insert (402) is fixedly connected to the upper unloading back plate (201).
4. The thick material flanging and chamfering forming mold structure according to claim 3, characterized in that, The upper mold (10) is provided with an upper unloading spring (701) for pushing open the upper unloading structure (20), and the lower end of the upper unloading spring (701) abuts against the upper end of the upper unloading back plate (201).
5. The thick material flanging and chamfering forming mold structure according to claim 1, characterized in that, The upper mold (10) includes an upper mold base (101), and an upper pad (102) and an upper fixing plate (103) that are stacked and fixed below the upper mold base (101) in sequence. The piercing punch (401) is fixedly connected to the upper fixing plate (103).
6. The thick material flanging and chamfering forming mold structure according to claim 1, characterized in that, The lower mold (30) includes a lower support plate (305), and a lower pad (304), a lower mold base (303), a lower pad plate (302), and a concave mold plate (301) that are stacked and fixed on the lower support plate (305) in sequence; the chamfering and turning concave mold (501) is fixedly connected in the concave mold plate (301).
7. The thick material flanging and chamfering forming mold structure according to claim 6, characterized in that, A die block (502) is fixedly connected in the die plate (301), and the chamfering die (501) is fixedly arranged in the die block (502).
8. The thick material flanging and chamfering forming mold structure according to claim 6, characterized in that, The lower mold (30) is provided with a first lower unloading structure, which includes a lower ejector (601) and a first lower unloading spring (604) located below the lower ejector (601). The lower ejector (601) is movably disposed in the chamfering and turning die (501), and the first lower unloading spring (604) is fixedly connected to the lower pad (304).
9. The thick material flanging and chamfering forming mold structure according to claim 8, characterized in that, The first unloading structure further includes a lower ejector rod (602) and a lower pad block (603) arranged sequentially below the lower ejector (601). The lower ejector rod (602) is movably arranged in the chamfering die (501), the lower pad plate (302) and the lower die base (303). The lower pad block (603) is movably arranged in the lower die base (303). The lower end of the lower pad block (603) abuts against the first unloading spring (604).
10. The thick material flanging and chamfering forming mold structure according to claim 6, characterized in that, The lower mold (30) is provided with a second lower unloading structure, which includes a floating guide pin (801) and a second lower unloading spring (802) arranged below the floating guide pin (801); the floating guide pin (801) is movably connected in the concave mold plate (301), the lower pad plate (302) and the lower mold base (303), and the second lower unloading spring (802) is limited in the lower mold base (303).