A structure of a draw-ironing die
By designing a thinning deep drawing die structure, the problems of positioning accuracy and production cost in single-process dies were solved, realizing continuous automated production of multiple processes, improving product quality and reducing production costs.
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 single-process molds lack sufficient positioning accuracy in terms of product concentricity, height, and internal wall thickness, which increases the difficulty of production process control and affects product quality and production costs.
Design a thinning deep drawing die structure, including a deep drawing structure and a thinning deep drawing structure. By sequentially setting a deep drawing punch and a thinning deep drawing punch in the die along the feeding direction, and combining the use of nitrogen springs and push rods, multi-process continuous automated production of products can be realized.
This improved the product's positioning accuracy, reduced production costs, and ensured product quality stability and production efficiency.
Smart Images
Figure CN224372568U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of progressive die processing technology, and in particular to a thinning deep drawing 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 product shown is a gunpowder box for an airbag. Existing single-stage dies employ distributed operations, first cutting out the outer circle, then performing general drawing, followed by thinning and deep drawing for stamping. When the product has requirements regarding concentricity, height, and internal wall thickness, current single-stage dies cannot simultaneously complete both general drawing and thinning drawing. Performing these steps in a single-stage die requires multiple sets of dies, which not only affects the product's positioning accuracy but also increases the difficulty of production process control, hindering product quality and production cost control. Therefore, there is a need to invent a new die structure for thinning and deep drawing. Utility Model Content
[0003] The purpose of this invention is to provide a thinning deep drawing die structure that can be used in progressive dies, solving the problem that existing single-process dies require deep drawing of products before thinning and deep drawing, which affects the positioning accuracy and production cost of the products.
[0004] The technical solution adopted by this utility model to solve its technical problem is:
[0005] A thinning deep drawing die structure includes an upper die, an upper unloading structure, and a lower die. A deep drawing structure and a thinning deep drawing structure are arranged sequentially in the die along the feeding direction.
[0006] The deep drawing structure includes a deep drawing punch disposed in the upper die, the outer diameter of which is adapted to the inner diameter of the product blank; the upper unloading structure is provided with a first spring, and a guide positioning insert is movably disposed below the first spring, the deep drawing punch passing through the spring and the guide positioning insert in sequence; the lower die is provided with a deep drawing die at a position relative to the deep drawing punch, the inner diameter of which is adapted to the outer diameter of the product blank;
[0007] The thinning and drawing structure includes a thinning and drawing punch disposed in the upper die. The pressing height and diameter of the thinning and drawing punch are both greater than those of the drawing punch. The outer diameter of the thinning and drawing punch is adapted to the inner diameter of the product blank. The thinning and drawing punch passes through the upper unloading structure and is movably connected to the upper unloading structure. A thinning and drawing die is disposed in the lower die at a position relative to the thinning and drawing punch. The inner diameter of the thinning and drawing die is adapted to the outer diameter of the product blank.
[0008] Preferably, in conjunction with the above scheme, a first push rod and a second push rod are movably arranged in the lower die relative to the drawing punch and the thinning drawing punch, respectively, and a first nitrogen spring and a second nitrogen spring are respectively arranged below the first push rod and the second push rod.
[0009] Preferably, in conjunction with the above scheme, the upper die includes an upper die base, and an upper pad and an upper fixing plate that are sequentially stacked and fixed below the upper die base, wherein the drawing punch and the thinning drawing punch are both fixedly connected in the upper fixing plate.
[0010] Preferably, in combination with the above scheme, the upper unloading structure includes an upper unloading back plate and an upper unloading plate, and the spring and guide positioning insert are both limited and arranged in the upper unloading structure.
[0011] Preferably, in conjunction with the above scheme, the lower die includes a lower die base, and a lower back plate, a lower pad plate, and a lower template plate that are sequentially stacked and fixed above the lower die base. The bottoms of the first nitrogen spring and the second nitrogen spring are fixedly connected to the lower die base. The first push rod is movably connected in the lower pad plate and the lower template plate. The second push rod is movably connected in the lower back plate, the lower pad plate, and the lower template plate. The drawing die and the thinning drawing die are both fixedly connected in the lower template plate.
[0012] Preferably, in conjunction with the above scheme, the lower ends of the drawing die and the thinning drawing die are respectively fixedly connected to a first die pad and a second die pad, and the first die pad and the second die pad are both fixedly connected in the lower template.
[0013] Preferably, in conjunction with the above scheme, the bottom outer side of the guide positioning insert and the top inner side of the drawing die are both provided with rounded corners, and the top inner side of the thinning drawing punch is provided with rounded corners.
[0014] Preferably, in conjunction with the above scheme, the bottom of both the drawing punch and the thinning drawing punch is provided with rounded corners.
[0015] Preferably, in combination with the above scheme, the inner walls of the drawing die and the thinning drawing die are both tapered structures with a smaller upper part and a larger lower part.
[0016] Preferably, in conjunction with the above scheme, the lower part of the thinning drawing die is provided with a forming rounded corner corresponding to the thickening transition position of the side wall of the product blank, with its diameter being larger at the top and smaller at the bottom.
[0017] The beneficial effects of this utility model are: This utility model has a good fit and positioning when forming the product through the flanging process, the height difference of the product after flanging is small, and it effectively solves the problem of stress cracking at the edge during conventional flanging. It plays an important role in ensuring the stability of product quality, effectively reducing production costs and improving production efficiency.
[0018] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0019] Figure 1 This is a cross-sectional view of the product in this utility model.
[0020] Figure 2 This is a progressive die layout diagram for the application of this utility model.
[0021] Figure 3 This is a cross-sectional view of the thinning deep drawing die structure of this utility model in its open state.
[0022] Figure 4 This is a sectional view of the closed state of a thinning deep drawing die structure according to this utility model.
[0023] Figure 5 This is an enlarged view of the lower structure of the thinning and drawing die in this utility model. Detailed Implementation
[0024] like Figure 1 and Figure 4 The thinning deep drawing die structure shown includes an upper die 10, an upper unloading structure 20, and a lower die 30. A deep drawing structure and a thinning deep drawing structure are arranged sequentially in the die along the feeding direction.
[0025] The deep drawing structure includes a deep drawing punch 401 disposed in the upper die 10, the outer diameter of which is adapted to the inner diameter of the product blank 1; a first spring 402 is disposed in the upper unloading structure 20, and a guide positioning insert 403 is movably disposed below the first spring 402, the deep drawing punch 401 passing through the spring 402 and the guide positioning insert 403 in sequence; a deep drawing die 404 is disposed in the lower die 30 at a position relative to the deep drawing punch 401, the inner diameter of which is adapted to the outer diameter of the product blank 1;
[0026] The thinning and drawing structure includes a thinning and drawing punch 501 disposed in the upper die 10. The pressing height and diameter of the thinning and drawing punch 501 are both greater than those of the drawing punch 401. The outer diameter of the thinning and drawing punch 501 is adapted to the inner diameter of the product blank 1. The thinning and drawing punch 501 passes through the upper unloading structure 20 and is movably connected to the upper unloading structure 20. A thinning and drawing die 502 is disposed in the lower die 30 at a position relative to the thinning and drawing punch 501. The inner diameter of the thinning and drawing die 502 is adapted to the outer diameter of the product blank 1.
[0027] To facilitate flexible unloading, the product blank 1 is ejected after molding. The lower die 30 is movably provided with a first push rod 406 and a second push rod 504 at positions relative to the drawing punch 401 and the thinning drawing punch 501, respectively. A first nitrogen spring 407 and a second nitrogen spring 505 are respectively provided below the first push rod 406 and the second push rod 504.
[0028] To facilitate the installation and fixing of the deep drawing punch 401 and the thinning deep drawing punch 501, the upper die 10 includes an upper die base 101, and an upper pad 102 and an upper fixing plate 103 that are stacked and fixed below the upper die base 101 in sequence. The deep drawing punch 401 and the thinning deep drawing punch 501 are both fixedly connected in the upper fixing plate 103.
[0029] To facilitate the downward pushing of the material strip for unloading, the upper unloading structure 20 includes an upper unloading back plate 201 and an upper unloading plate 202. The spring 402 and the guide positioning insert 403 are both limited and positioned within the upper unloading structure 20. The upper unloading structure 20 can be hung on the upper mold 10 via the limiting hanging plate.
[0030] To facilitate the installation of the push rod and nitrogen spring, the lower die 30 includes a lower die base 304, and a lower back plate 303, a lower pad plate 302, and a lower template 301 that are sequentially stacked and fixed above the lower die base 304. The bottoms of the first nitrogen spring 407 and the second nitrogen spring 505 are fixedly connected to the lower die base 304. The first push rod 406 is movably connected in the lower pad plate 302 and the lower template 301. The second push rod 504 is movably connected in the lower back plate 303, the lower pad plate 302, and the lower template 301. The drawing die 404 and the thinning drawing die 502 are both fixedly connected in the lower template 301.
[0031] In order to reduce the height of the working parts of the deep drawing die 404 and the thinning deep drawing die 502, and reduce processing time and production costs, the lower ends of the deep drawing die 404 and the thinning deep drawing die 502 are respectively fixedly connected to a first die pad 405 and a second die pad 503, and the first die pad 405 and the second die pad 503 are both fixedly connected in the lower template 301.
[0032] In order to smoothly position and press into the product blank 1, the bottom outer side of the guide positioning insert 403 and the top inner side of the drawing die 404 are provided with rounded corners, and the top inner side of the thinning drawing punch 501 is provided with rounded corners.
[0033] To facilitate the forming of the lower conical structure of the product blank 1 in subsequent work stations, the bottom of both the deep drawing punch 401 and the thinning deep drawing punch 501 are provided with rounded corners.
[0034] In order to reduce the drawing resistance when the product blank 1 is drawn, a clearance is set. The inner walls of the drawing die 404 and the thinning drawing die 502 are both tapered structures with a smaller top and a larger bottom, and the slope is 2 degrees.
[0035] To facilitate the formation of a thin-on-top, thick-on-bottom structure in product blank 1, such as Figure 5 As shown, the lower part of the thinning drawing die 502, corresponding to the thickening transition position of the side wall of the product blank 1, is provided with a forming fillet 5011, the diameter of which is larger at the top and smaller at the bottom. Figure 1 As shown, the thickness of the straight section 11 after the final forming of the product in the subsequent work stations is less than the thickness of the conical section 12, and its forming radius 5011 corresponds to the position of the finished product radius 13.
[0036] The working principle of this utility model:
[0037] like Figure 2 As shown, in order to process as Figure 1The product's entire processing flow is divided into 28 stations, from g1 to g28. Specifically: station g1 punches guide holes for precise positioning in subsequent stations; station g2 tears the strip, using the previously punched guide holes for precise positioning; stations g3-g5 are empty stations to allow sufficient space for the next process; station g is a first downward drawing station; stations g7-g9 are empty stations to prevent strip deformation and tearing; station g10 is a second downward drawing station; station g11 is empty station to allow sufficient space for the next process; station g12 is a third downward drawing station (equipped with the drawing structure of this invention); station g13 is empty station to allow sufficient space for the next process; station g14 is a downward thinning drawing station (equipped with the thinning drawing structure of this invention); station g15 is empty station... The following 28 stations are used to ensure sufficient space for the next process: station g16 is the tapered forming station; station g17 is empty, allowing sufficient space for the next process; station g18 is the primary forming station; station g19 is empty, allowing sufficient space for the next process; station g20 is the secondary forming station; station g21 is the tertiary forming station; stations g22-g24 are empty, allowing sufficient space for the next process; station g25 is the punching station; station g26 is empty, allowing sufficient space for the next process; station g27 is the blanking station, where the required product is cut and separated from the strip and falls downwards from the lower die holder; station g28 is the scrap removal station, removing excess scrap. These 28 stations complete the continuous stamping process of the entire product. The key features of this invention are the deep drawing structure at station g12 and the thinning deep drawing structure at station g14.
[0038] When the product blank 1, after being processed in the previous process, enters the deep drawing structure station between the upper unloading structure 20 and the lower die 30 along with the material strip, the upper die 10 drives the upper unloading structure 20 to press down together. The guide positioning insert 403 first enters the product blank 1 for positioning. When the upper unloading structure 20 contacts the lower die 301, the deep drawing punch 401 gradually extends into the deep drawing die 404 and the first push rod 406 to press down the material. Then it continues to enter the deep drawing punch 401 to complete the ordinary deep drawing action.
[0039] Meanwhile, in the thinning and drawing structure of the next station, the thinning and drawing punch 501 presses the material down with the second push rod 504, and then continues to press the product blank 1, which has completed the ordinary drawing process, into the thinning and drawing die 502, completing the thinning and drawing action. As the die opens, the strip material separates from the drawing structure and the thinning and drawing structure, and enters the subsequent station for processing. Through the opening and closing of the die, the multi-station processing of the product blank 1 can be completed successively.
[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 thinning deep drawing die structure, comprising an upper die (10), an upper unloading structure (20), and a lower die (30), characterized in that, in The mold has a drawing structure and a thinning drawing structure arranged sequentially along the feeding direction; The deep drawing structure includes a deep drawing punch (401) disposed in the upper die (10), the outer diameter of which is adapted to the inner diameter of the product blank (1); a first spring (402) is disposed in the upper unloading structure (20), and a guide positioning insert (403) is movably disposed below the first spring (402), the deep drawing punch (401) passes through the spring (402) and the guide positioning insert (403) in sequence; a deep drawing die (404) is disposed in the lower die (30) at a position relative to the deep drawing punch (401), the inner diameter of which is adapted to the outer diameter of the product blank (1); The thinning and drawing structure includes a thinning and drawing punch (501) disposed in the upper die (10). The pressing height and diameter of the thinning and drawing punch (501) are both greater than those of the drawing punch (401). The outer diameter of the thinning and drawing punch (501) is adapted to the inner diameter of the product blank (1). The thinning and drawing punch (501) passes through the upper unloading structure (20) and is movably connected to the upper unloading structure (20). A thinning and drawing die (502) is disposed in the lower die (30) at a position relative to the thinning and drawing punch (501). The inner diameter of the thinning and drawing die (502) is adapted to the outer diameter of the product blank (1).
2. The thinning deep drawing die structure according to claim 1, characterized in that, The lower die (30) is provided with a first push rod (406) and a second push rod (504) respectively at positions relative to the drawing punch (401) and the thinning drawing punch (501). A first nitrogen spring (407) and a second nitrogen spring (505) are respectively provided below the first push rod (406) and the second push rod (504).
3. The thinning deep drawing die structure according to claim 1, characterized in that, The upper die (10) includes an upper die base (101), and an upper pad plate (102) and an upper fixing plate (103) that are stacked and fixed below the upper die base (101) in sequence. The drawing punch (401) and the thinning drawing punch (501) are both fixedly connected in the upper fixing plate (103).
4. The thinning deep drawing die structure according to claim 1, characterized in that, The upper unloading structure (20) includes an upper unloading back plate (201) and an upper unloading plate (202). The spring (402) and the guide positioning insert (403) are both limited in the upper unloading structure (20).
5. The thinning deep drawing die structure according to claim 2, characterized in that, The lower die (30) includes a lower die base (304), and a lower back plate (303), a lower pad plate (302), and a lower template (301) that are stacked and fixed on top of the lower die base (304). The bottoms of the first nitrogen spring (407) and the second nitrogen spring (505) are fixedly connected to the lower die base (304). The first push rod (406) is movably connected in the lower pad plate (302) and the lower template (301). The second push rod (504) is movably connected in the lower back plate (303), the lower pad plate (302), and the lower template (301). The drawing die (404) and the thinning drawing die (502) are both fixedly connected in the lower template (301).
6. The thinning deep drawing die structure according to claim 5, characterized in that, The lower ends of the drawing die (404) and the thinning drawing die (502) are respectively fixedly connected to a first die pad (405) and a second die pad (503), and the first die pad (405) and the second die pad (503) are both fixedly connected in the lower template (301).
7. The thinning deep drawing die structure according to claim 1, characterized in that, The bottom outer side of the guide positioning insert (403) and the top inner side of the drawing die (404) are both provided with rounded corners, and the top inner side of the thinning drawing punch (501) is provided with rounded corners.
8. The thinning deep drawing die structure according to claim 1, characterized in that, The bottom of both the drawing punch (401) and the thinning drawing punch (501) are provided with rounded corners.
9. The thinning deep drawing die structure according to claim 1, characterized in that, The inner walls of the drawing die (404) and the thinning drawing die (502) are both tapered structures with a smaller upper part and a larger lower part.
10. The thinning deep drawing die structure according to claim 1, characterized in that, The lower part of the thinning drawing die (502) is provided with a forming fillet (5011) at the thickening transition position of the side wall of the product blank (1), with a larger diameter at the top and a smaller diameter at the bottom.