A die structure with replaceable parts for bending Z-shaped products
By designing a quick-release bending punch and a quick-release plate-removing bending insert, the problem of rapid replacement of bending dies for Z-type products during maintenance was solved, avoiding material pulling, breakage, and cracking, and improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN DAQO KFINE PRECISION MOULD CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-29
Smart Images
Figure CN224294458U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mold technology, specifically relating to a mold structure for quick-replacement parts suitable for bending Z-shaped products. Background Technology
[0002] In the current bending of various Z-shaped products, there are roughly two forming methods: one is that the bending punch is fixedly installed on the upper clamping plate. In this method, the product has less bending springback and stable dimensions, but the bending punch cannot be quickly replaced during mold maintenance, resulting in low maintenance efficiency; the other is that the bending insert is completely fixed inside the upper stripper plate. In this method, the product has severe material pulling at the bending point, which easily leads to breakage and cracking, resulting in poor bending dimensions.
[0003] Therefore, there is an urgent need for a mold structure suitable for bending Z-shaped products, which can be quickly disassembled and replaced without causing problems such as material pulling, breakage, and cracking at the bending point. Utility Model Content
[0004] To address the problems existing in the prior art, this utility model provides a mold structure for quick-replacement parts suitable for bending Z-shaped products. This structure can solve the problems of material pulling, breakage, and cracking at the bending point of the product, as well as the problem of the bending punch not being able to be quickly replaced during mold maintenance.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:
[0006] A mold structure for quick-release parts for bending Z-shaped products includes an upper mold and a lower mold. The upper mold includes a quick-release bending punch and a quick-release platen bending insert. The quick-release bending punch is slidably mounted in the upper mold, and the quick-release platen bending insert is detachably mounted in the upper mold. The quick-release bending punch has a limiting notch on its side, and the quick-release platen bending insert has a boss on its side that matches the limiting notch. The lower mold has a lower mold bending insert corresponding to the quick-release bending punch and a floating pressure block corresponding to the quick-release platen bending insert.
[0007] Furthermore, the upper die also includes an upper release plate, a release back plate, and an upper clamping plate. The upper release plate and the release back plate are respectively provided with punch holes for installing quick-release bending punches. The upper clamping plate is wire-cut with sliding holes for installing quick-release bending punches. The quick-release bending punches slide up and down in the sliding holes and punch holes.
[0008] Furthermore, the bottom of the quick-release plate bending insert is provided with a through countersunk hole, and the internal hex screw locks the quick-release plate bending insert onto the back plate through the countersunk hole.
[0009] Furthermore, the height of the limiting notch is greater than the height of the boss by 1.0mm to 3.0mm.
[0010] Furthermore, the upper mold also includes an upper mold base, an upper pad, and an upper mold rectangular spring. The upper pad and the upper clamping plate are fixed on the upper mold base, and the upper mold rectangular spring provides elastic force for the sliding of the back plate and the upper release plate (4).
[0011] Furthermore, the lower mold includes a lower template, a lower pad, a lower mold base, and a lower mold rectangular spring. The lower template and the lower pad are fixed on the lower mold base, and the floating pressure block and the lower mold bending insert are installed inside the lower template.
[0012] Furthermore, the upper mold also includes an inner guide post and an upper mold inner guide sleeve. The inner guide post is fixed on the upper clamping plate, and the upper mold inner guide sleeve is installed on the upper release plate. The lower mold also includes a lower mold inner guide sleeve, which is installed inside the lower template. The upper mold and the lower mold are guided vertically and vertically within the upper mold inner guide sleeve and the lower mold inner guide sleeve by the inner guide post.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] This utility model provides a mold structure for quick-change parts in Z-shaped product bending. It is suitable for Z-shaped bending dies with material thickness below 2.0 mm, bending height (H) less than 5 times the material thickness, and bending head length (L) relatively small. This mold structure utilizes the characteristic of the quick-release bending punch to move slightly up and down within the sliding hole of the upper clamping plate and the punch hole of the upper release plate, solving the problems of material pulling, breakage, and cracking at the bending point of the product, thereby improving production efficiency and product quality. Furthermore, the quick-release bending punch utilizes the matching notch on its side and the boss on the side of the quick-release plate bending insert for rapid replacement, solving the problem of the bending punch not being able to be quickly replaced during mold maintenance, thus reducing mold maintenance time and costs. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the closed mold of this utility model.
[0016] Figure 2 This is a schematic diagram of the mold opening process for this utility model.
[0017] Figure 3 This is a partial structural diagram of the quick-release bending punch and quick-release plate-removing bending insert of this utility model in the closed mold state.
[0018] Figure 4 This is a partial structural diagram of the quick-release bending punch and quick-release plate-removing bending insert in the mold-opening state.
[0019] Figure 5 This is a disassembly and explosion diagram of the quick-release bending punch and the quick-release plate removal bending insert.
[0020] Figure 6 This is a side view of the product.
[0021] The components include: 1. Lower die base; 2. Lower backing plate; 3. Lower template; 4. Upper ejector plate; 5. Backing plate; 6. Upper clamping plate; 7. Upper backing plate; 8. Upper die base; 9. Upper die rectangular spring; 10. Quick-release bending punch; 10-1, 10-1, Limiting notch; 11. Quick-release ejector bending insert; 11-1, Boss; 11-2, Threaded countersunk hole; 12. Socket head screw; 13. Equal height sleeve assembly; 14. Inner guide post; 15. Upper die inner guide sleeve; 16. Product strip; 17. Lower die inner guide sleeve; 18. Floating pressure block; 19. Lower die rectangular spring; 20. Lower die bending insert. Detailed Implementation
[0022] The specific embodiments of this utility model will be further explained below with reference to the accompanying drawings.
[0023] like Figures 1-5 As shown, this is a mold structure for quick-change parts suitable for bending Z-type products, including an upper mold and a lower mold. It is suitable for Z-type bending products with a material thickness of less than 2.0 mm, a bending height (H) of less than 5 times the material thickness, and a small bending head length (L).
[0024] The upper mold includes an upper mold base 8, an upper pad 7, an upper clamping plate 6, a back plate 5, an upper release plate 4, an upper mold rectangular spring 9, a quick-release bending punch 10, a quick-release plate bending insert 11, an internal hex screw 12, an equal height sleeve assembly 13, an inner guide post 14, and an upper mold inner guide sleeve 15.
[0025] Specifically, the upper pad 7 and the upper clamping plate 6 are fixed on the upper mold base 8, the inner guide post 14 is fixed on the upper clamping plate 6, the upper ejector plate 4 is installed with the upper mold inner guide sleeve 15 and the quick-release ejector plate bending insert 11, and then fixed together with the ejector back plate 5, and connected to the upper mold through the equal height sleeve assembly 13. The upper mold rectangular spring 9 is installed in the upper mold to provide elastic force for the ejector back plate 5 and the upper ejector plate 4 to slide, and the inner guide post 14 slides up and down in the upper mold inner guide sleeve 15.
[0026] The upper release plate 4 and the back plate 5 are respectively provided with punch holes for installing quick-release bending punches 10. The upper clamping plate 6 is wire-cut with sliding holes for installing quick-release bending punches 10. The size of the sliding holes is adapted to the quick-release bending punches 10, and the quick-release bending punches 10 can slide up and down in the sliding holes, but cannot wobble. The side of the quick-release bending punches 10 is provided with a limiting notch 10-1, and the side of the quick-release plate bending insert 11 is provided with a boss 11-1 adapted to the limiting notch 10-1. The height of the limiting notch 10-1 is greater than the height of the boss 11-1, by 1.0. The diameter of the quick-release bending punch 10 is preferably 3.0 mm. The quick-release bending punch 10 can move slightly up and down within the sliding hole of the upper clamping plate 6, the punch hole of the upper release plate 4 and the release back plate 5. The range of the movement stroke h is 1.0 mm to 3.0 mm. The quick-release bending punch 10 and the quick-release release plate bending insert 11 are engaged by the limiting notch 10-1 and the boss 11-1. At the same time, the bottom of the quick-release release plate bending insert 11 is provided with a through thread countersunk hole 11-2, which makes it easy to lock the quick-release release plate bending insert 11 onto the release back plate 5 with the internal hex screw 12. The purpose of this setting is to facilitate quick release.
[0027] The lower mold includes a lower template 3, a lower pad 2, a lower mold base 1, a lower mold inner guide sleeve 17, a floating pressure block 18, a lower mold rectangular spring 19, and a lower mold bending insert 20.
[0028] Specifically, the lower template 3 and the lower pad 2 are fixed on the lower mold base 1. The lower mold inner guide sleeve 17, the floating pressure block 18, and the lower mold bending insert 20 are installed inside the lower template 3. The lower mold bending insert 20 corresponds to the quick-release bending punch 10 of the upper mold. The floating pressure block 18 corresponds to the quick-release plate bending insert 11 of the upper mold. The lower mold rectangular spring 19 is installed inside the lower mold to provide elastic force for the sliding of the floating pressure block 18.
[0029] The upper and lower molds move up and down within the inner guide sleeve 15 of the upper mold and the inner guide sleeve 17 of the lower mold via the inner guide post 14, thus guiding the upper and lower molds.
[0030] The working process of the mold structure for quick-change parts applicable to Z-shaped product bending described in this embodiment is as follows:
[0031] During production, the upper die is fixed on the table of the punch press, and the lower die is fixed on the lower table of the punch press. The die closing height is adjusted. The upper die of the product strip 16 moves downward, and the guide post 14 inside the upper die is guided into the guide sleeve 17 inside the lower die. The quick-release bending insert 11 inside the upper release plate 4 first contacts the product strip 16, and then contacts the floating pressure block 18 to compress the lower die rectangular spring 19, starting the Z-shaped bending of the product until the floating pressure block 18 is pressed back to the closed state. Then the upper die drives the quick-release bending punch 10 to start bending until the die is closed, completing the Z-shaped bending of the product.
[0032] The Z-bending forming process can be divided into three motion processes:
[0033] First movement process: The quick-release bending insert 11 inside the upper release plate 4 first contacts the product strip 16 and continues to move downward, then contacts the floating pressure block 18 and compresses the lower die rectangular spring 19 to bend the bottom corner A of the Z-shape until the floating pressure block 18 is pressed back to the closed state. During this movement process, the bending head of the product naturally bends upward and pushes the quick-release bending punch 10 upward, so that the quick-release bending punch 10 is in the open mold state, reducing the pulling force during this bending process and solving the problem of bending breakage and cracking.
[0034] The second motion process: The upper die continues to move downward, driving the quick-release bending punch 10 to bend the top corner B of the Z-shape until the die is closed. During this process, no pulling force is generated, the product is formed stably, and the springback is small.
[0035] The third motion process: When the mold opens, the upper mold part moves upward with the punch press slide. The upper mold rectangular spring 9 extends to release pressure, so that the upper stripper plate 4 is stationary relative to the lower template 3. The quick-release bending punch 10 exits the bending state first, and the upper mold part continues to move upward, driving the upper stripper plate 4 to move upward. The lower mold rectangular spring 19 extends to release pressure, so that the floating pressure block 18 bounces up until the mold is completely disengaged.
[0036] In this embodiment, when the mold structure is repaired, the reverse locking hexagonal screw 12 is removed, and the quick-release plate bending insert 11 is quickly pulled out using the countersunk hole 11-2 at the bottom of the quick-release plate bending insert 11. The quick-release plate bending insert 11 pulls out the quick-release bending punch 10 along with the boss 11-1 on the side, thus achieving quick replacement.
[0037] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A mold structure for quick-change parts suitable for bending Z-shaped products, comprising an upper mold and a lower mold, characterized in that, The upper die includes a quick-release bending punch (10) and a quick-release plate-removing bending insert (11). The quick-release bending punch (10) is slidably installed in the upper die, and the quick-release plate-removing bending insert (11) is detachably installed in the upper die. The side of the quick-release bending punch (10) is provided with a limiting notch (10-1), and the side of the quick-release plate-removing bending insert (11) is provided with a boss (11-1) that matches the limiting notch (10-1). The lower die is provided with a lower die bending insert (20) corresponding to the quick-release bending punch (10) and a floating pressure block (18) corresponding to the quick-release plate-removing bending insert (11).
2. The mold structure for quick-change parts suitable for bending Z-shaped products according to claim 1, characterized in that, The upper mold also includes an upper ejector plate (4), an ejector back plate (5), and an upper clamping plate (6). The upper ejector plate (4) and the ejector back plate (5) are respectively provided with punch holes for installing quick-release bending punches (10). The upper clamping plate (6) is wire-cut with sliding holes for installing quick-release bending punches (10). The quick-release bending punches (10) slide up and down in the sliding holes and punch holes.
3. The mold structure for quick-change parts suitable for bending Z-shaped products according to claim 2, characterized in that, The bottom of the quick-release plate bending insert (11) is provided with a through thread countersunk hole 11-2. The internal hex screw (12) locks the quick-release plate bending insert (11) onto the back plate (5) through the thread countersunk hole (11-2).
4. The mold structure for quick-change parts suitable for bending Z-shaped products according to claim 1, characterized in that, The height of the limiting notch (10-1) is greater than the height of the boss (11-1) by 1.0mm to 3.0mm.
5. A mold structure for quick-change parts suitable for bending Z-shaped products according to claim 2, characterized in that, The upper mold also includes an upper mold base (8), an upper pad (7), and an upper mold rectangular spring (9). The upper pad (7) and the upper clamping plate (6) are fixed on the upper mold base (8), and the upper mold rectangular spring (9) provides elastic force for the sliding of the back plate (5) and the upper release plate (4).
6. A mold structure for quick-change parts suitable for bending Z-shaped products according to claim 1, characterized in that, The lower mold includes a lower template (3), a lower pad (2), a lower mold base (1), and a lower mold rectangular spring (19). The lower template (3) and the lower pad (2) are fixed on the lower mold base (1), and the floating pressure block (18) and the lower mold bending insert (20) are installed inside the lower template (3).
7. A mold structure for quick-change parts suitable for bending Z-shaped products according to claim 6, characterized in that, The upper mold also includes an inner guide post (14) and an upper mold inner guide sleeve (15). The inner guide post (14) is fixed on the upper clamping plate (6). The upper release plate (4) is equipped with the upper mold inner guide sleeve (15). The lower mold also includes a lower mold inner guide sleeve (17). The lower mold inner guide sleeve (17) is installed in the lower template (3). The upper mold and the lower mold are guided vertically and vertically within the upper mold inner guide sleeve (15) and the lower mold inner guide sleeve (17) by the inner guide post (14).