Stamping burr-free sharp corner blanking structure
By splicing special-shaped punches A and B into a combined punch, and using characteristic bevels and arcs to form sharp corner features, the problems of material running and low production efficiency during sharp corner blanking in the existing technology are solved, and a one-stop solution is achieved. Complete burr-free sharp corner blanking.
Patent Information
- Application Number
- CN202420153908.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-22
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-01-22
AI Technical Summary
When processing sharp corner features, the existing die design needs to be discharged step by step, causing the material to run during the discharge process, forming hard burrs, and increasing production costs and reducing production efficiency.
Two special-shaped punches are spliced together, and a characteristic bevel is set on the special-shaped punch A and a characteristic arc is set on the special-shaped punch B to form a combined punch and realize the inner contour design of the sharp corner features, so that the sharp corners can be lowered. Materials can be completed at one stop.
It achieves the burr-free effect of sharp corner cutting, avoids material running, simplifies the production process, reduces production costs, and improves production efficiency.
Smart Images
Figure CN222370102U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of punching dies, in particular to a punching blanking structure without burrs or sharp corners. Background Art
[0002] In conventional die design, when encountering products that require sharp corners, since the inner contour processing of the punch cannot achieve sharp corners, the general method of cutting is to cut in two steps, such as Figure 1 , 2 As shown, in the first step of blanking, the first punch (1') is used to punch out the upper half (3') of the sharp corner, and in the second step of blanking, the second punch (2') is used to punch out the lower half (4') of the sharp corner, thereby finally realizing the processing of the sharp corner feature.
[0003] Although this method can achieve sharp corner features, due to the step-by-step material cutting, when the second station is cut, the product material will run to the side where the material has already been cut, thus forming an obvious hard burr, which is difficult to meet the latest application requirements of the product. In addition, the use of secondary cutting increases production costs and reduces production efficiency, which needs to be improved. Utility Model Content
[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide a punching sharp-corner blanking structure without burrs. The structure adopts the method of splicing two special-shaped punches to realize the sharp-corner feature of the inner contour of the punch, so that the sharp-corner blanking can be completed in one station. In this way, the material of the product will not run when blanking, thereby realizing burr-free sharp-corner blanking.
[0005] The purpose of the utility model is achieved through the following technical solutions: this punching burr-free sharp-angle blanking structure includes a lower blade, a product, a special-shaped punch A, a special-shaped punch B and a punch fixing block. The product is placed on the lower blade and aligned with the blanking groove on the lower blade. The special-shaped punch A and the special-shaped punch B are tightly fitted through the splicing surface to form a combined punch. The special-shaped punch A is provided with a characteristic inclined surface near the splicing surface to cooperate with the characteristic arc provided near the splicing surface of the special-shaped punch B, so that the combined punch forms a sharp-angle feature; the head of the combined punch is directly opposite to the blanking groove, the root of the combined punch is embedded in the punch fixing block, and moves up and down with the punch fixing block, and the sharp-angle blanking of the product is realized by utilizing the sharp-angle feature of the combined punch.
[0006] As a further technical solution, an entry block is arranged above the product, and the head of the combined punch is embedded in the entry block and slides up and down along the inner wall of the entry block.
[0007] As a further technical solution, a slide groove is provided through the entry block for inserting the combination punch. The outer diameter of the head of the combination punch is narrowed to form a narrowed portion, and the inner diameter of the lower end of the slide groove is also narrowed to form a narrowed section, and the narrowed section matches the contour of the narrowed portion, thereby limiting the downward movement of the combination punch.
[0008] As a further technical solution, a punch pressing plate is fixedly installed above the punch fixing block to press the special-shaped punches A and B.
[0009] The beneficial effects of the utility model are:
[0010] 1. Set a characteristic bevel on the special-shaped punch A, and set a characteristic arc on the special-shaped punch B. After splicing and combining, the two form a sharp corner feature, realizing the sharp corner feature of the inner contour of the combined punch, so that the sharp corner blanking can be completed in one station, so that the material will not run when the product is blanked, ensuring burr-free sharp corner blanking;
[0011] 2. The combined punch is guided by the block when it moves up and down, ensuring accurate punching position and reliable operation of the die;
[0012] 3. The narrowing section of the combination punch cooperates with the narrowing part of the insert block to limit the downward movement of the combination punch and prevent the combination punch from excessive downward punching. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the first step of material cutting in the prior art.
[0014] Figure 2 It is a structural schematic diagram of the second step of blanking in the prior art.
[0015] Figure 3 It is a three-dimensional structural schematic diagram of the utility model.
[0016] Figure 4 It is a schematic diagram of the structure when the special-shaped punch A and the special-shaped punch B are separated.
[0017] Figure 5 It is a schematic diagram of the structure when the special-shaped punch A and the special-shaped punch B are in close contact.
[0018] Figure 6 It is a bottom view structural schematic diagram of the entry block in the utility model.
[0019] Figure 7 for Figure 6 AA section view.
[0020] Figure 8 It is a schematic diagram of the cross-sectional structure of the combined punch in the utility model.
[0021] Fig. 9 It is a schematic cross-sectional view of the structure of the combined punch and the insert block in the present invention when they cooperate.
[0022] Fig.10 This is a schematic diagram of the product structure after stamping.
[0023] Description of the accompanying drawings: first punch (1'), second punch (2'), upper half (3'), lower half (4');
[0024] Lower cutting edge 1, product 2, entry block 3, special-shaped punch A4, special-shaped punch B5, punch fixing block 6, punch pressing plate 7, characteristic arc 8, characteristic inclined surface 9, splicing surface 10, sharp corner feature 11, combined punch 12, slide groove 13, narrowing section 14, narrowing part 15, discharge chute 16. DETAILED DESCRIPTION
[0025] The utility model will be described in detail below with reference to the accompanying drawings:
[0026] Example: As attached Figures 3 to 10 As shown, this punching structure for blanking materials without burrs and sharp corners includes a lower cutting edge 1, a product 2, an entry block 3, a special-shaped punch A4, a special-shaped punch B5, a punch fixing block 6, a punch pressing plate 7, a characteristic arc 8, a characteristic inclined surface 9, a splicing surface 10, a sharp-cornered feature 11, a combined punch 12, a slide groove 13, a narrowing section 14, a narrowing portion 15 and a blanking trough 16.
[0027] Reference Figure 3 During the stamping process, the product 2 is placed on the lower cutting edge 1, and the unloading position of the product 2 is aligned with the unloading groove 16 on the lower cutting edge 1.
[0028] like Figure 4 , 5 As shown in Figure 8, the joint surfaces 10 of the special-shaped punch A4 and the special-shaped punch B5 are tightly fitted together to form a combined punch 12, wherein a characteristic inclined surface 9 is provided on the special-shaped punch A4 near the joint surface 10, and the characteristic inclined surface 9 can cooperate with the characteristic arc 8 provided on the special-shaped punch B5 near the joint surface 10, so that the inner contour of the combined punch 12 forms a sharp-angle feature 11.
[0029] Further, such as Figure 3 As shown, a block 3 is provided above the product 2, such as Figure 6 , 7 As shown, a slide groove 13 is formed on the entry block 3, and the head of the combined punch 12 is embedded in the slide groove 13 of the entry block 3 and can slide up and down along the inner wall of the entry block 3 (slide groove 13). Figure 7 , 8 9. The outer diameter of the head of the combination punch 12 is narrowed to form a narrowing portion 15, and the inner diameter of the lower end of the slide groove 13 is also narrowed to form a narrowing section 14, and the narrowing section 14 matches the contour of the narrowing portion 15, thereby limiting the downward movement of the combination punch 12. The slide groove 13 plays a guiding and limiting role in the process of the combination punch 12 sliding up and down.
[0030] like Figure 3As shown, the head of the combination punch 12 faces the blanking groove 16, and the root of the combination punch 12 is embedded and installed in the punch fixing block 6. A punch pressing plate 7 is fixed above the punch fixing block 6 by a threaded connection. The punch pressing plate 7 can press the special-shaped punch A4 and the special-shaped punch B5 so that the joint surfaces 10 of the two are in close contact. The formed combination punch 12 moves up and down with the punch fixing block 6, and the sharp-angled blanking of the product 2 is achieved by utilizing the sharp-angled feature 11 of the combination punch 12.
[0031] Working process of the utility model: the utility model divides the sharp corner feature on the outer contour of the product 2 into two, which correspond to the outer contours of the special-shaped punch A4 and the special-shaped punch B5 respectively. At the same time, under the action of the punch fixing block 6 and the entry block 3, the special-shaped punch A4 and the special-shaped punch B5 are tightly fitted together, so that a blanking punch with a sharp corner feature on the inner contour is spliced out, thereby realizing the sharp corner blanking process.
[0032] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.
Claims
1. A punching burr-free sharp corner blanking structure, characterized in that: The invention comprises a lower blade (1), a product (2), a special-shaped punch A (4), a special-shaped punch B (5) and a punch fixing block (6); the product (2) is placed on the lower blade (1) and aligned with a material discharge groove (16) on the lower blade (1); the special-shaped punch A (4) and the special-shaped punch B (5) are closely fitted together through a splicing surface (10) to form a combined punch (12); and the special-shaped punch A (4) is provided with a characteristic inclined surface near the splicing surface (10). (9) is used to cooperate with the characteristic arc (8) provided near the joint surface (10) of the special-shaped punch B (5) so that the combined punch (12) forms a sharp corner feature (11); the head of the combined punch (12) faces the blanking groove (16), and the root of the combined punch (12) is embedded in the punch fixing block (6), and moves up and down with the punch fixing block (6), and the sharp corner feature (11) of the combined punch (12) is used to realize the sharp corner blanking of the product (2).
2. The punching burr-free sharp-corner blanking structure according to claim 1 is characterized in that: An entry block (3) is arranged above the product (2), and the head of the combined punch (12) is embedded and installed in the entry block (3) and slides up and down along the inner wall of the entry block (3).
3. The punching burr-free sharp-corner blanking structure according to claim 2 is characterized in that: The insertion block (3) is provided with a sliding groove (13) for receiving the combination punch (12). The outer diameter of the head of the combination punch (12) is narrowed to form a narrowing portion (15). The inner diameter of the lower end of the sliding groove (13) is also narrowed to form a narrowing section (14). The narrowing section (14) matches the contour of the narrowing portion (15), thereby limiting the downward movement of the combination punch (12).
4. The punching burr-free sharp-corner blanking structure according to claim 1, characterized in that: A punch pressing plate (7) is fixedly installed above the punch fixing block (6) and is used to press the special-shaped punch A (4) and the special-shaped punch B (5).