Forming structure for negative angle folding and bending of thick material
Through the design of the thick folding negative angle folding structure, the second and third processes in the prior art are combined, and the 90° angle folded into -45° inward using the inlay punch and punch incline The stacking effect solves the problems of more molds and low efficiency in the prior art, and achieves cost savings and production efficiency improvement.
Patent Information
- Application Number
- CN202323637674.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2033-12-29
AI Technical Summary
The existing stacking process requires three molds, resulting in high production costs and low production efficiency, and a variety of steps.
A molding structure with negative angle folding and folding of thick materials is designed, including pressing plate, bending die, unloading plate insert and stacking punch, and 90° angle is achieved through the inlay punch and punch incline. Fold the inner to -45° and complete the process of stacking the edges to reduce the number of molds and process steps.
It saves a mold, reduces production costs, simplifies processes, improves production efficiency and reduces product processing time.
Smart Images
Figure CN222220892U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of stamping dies, and in particular relates to a forming structure for thick material negative angle folding and bending. Background Art
[0002] The folding process is a technology that processes metal materials into specific shapes. In this process, metal materials are sheared, folded and bent to form precise shapes and sizes. This process is commonly used to manufacture various mechanical parts, locks, furniture, construction and automotive parts. The folding process is a commonly used process in stamping dies. For some products that need to prevent scratches on cables, this process is often used. In the prior art, three processes are designed to fold and bend the product to the required angle: 1) fold the product at 90°; 2) fold the 90° angle of the product inward to -45°; 3) fold the -45° angle of the product to the desired angle.
[0003] However, the problems with the above traditional method are that three molds are needed, resulting in high production costs; multiple processing steps are required, and the operation of products between processes leads to low production efficiency. Utility Model Content
[0004] In view of the problems existing in the prior art, the utility model provides a forming structure for thick material negative angle folding and bending, aiming at effectively improving production efficiency and reducing production costs.
[0005] The utility model is achieved in this way:
[0006] A forming structure for negative-angle folding of thick materials, the forming structure comprising a pressing plate, a bending die, a stripper plate insert and a folding punch;
[0007] The pressing plate is used to fix the non-negative angle end of the product on the horizontal plane of the upper end of the bending die; the stripper plate insert is located at the negative angle end of the product, and the stripper plate insert completes the negative angle folding work by cooperating with the bending die below; there is a gap between the stripper plate insert and the pressing plate, and the gap is adapted to the size of the folding punch; before folding: the negative angle end of the product extends into the gap, and the folding punch is located directly above the gap; after folding: the folding punch descends into the gap, and the bottom of the folding punch bends the end of the product after the negative angle folding.
[0008] Furthermore, the protruding end of the stripping plate insert is an insert punch; the width of the insert punch is greater than the width of the groove, and the insert punch includes a positioning part located on the inner side of the die and a punch slope on the top of the die, and the punch slope is extruded by contact with the negative angle end of the product to fold the product into the same angle as the punch slope.
[0009] Furthermore, the distance between the pressing plate and the unloading plate inlay is 6 cm.
[0010] Furthermore, the farthest distance between the pressing plate and the inclined surface of the punch is 8 cm.
[0011] Furthermore, the angle between the inclined surface of the punch and the horizontal direction is 45°.
[0012] Furthermore, the inclined surface of the punch and the lower end of the insert punch adopt a rounded transition.
[0013] Furthermore, the lower end of the folding punch is a punch bevel.
[0014] Furthermore, the punch inclined surface is inclined from one end close to the stripper plate insert to the other end.
[0015] Furthermore, the angle between the punch inclined surface and the horizontal direction is 10°.
[0016] Furthermore, the punch bevel surface and the stacking punch vertical surface adopt rounded corner transition.
[0017] The utility model has the following advantages and technical effects:
[0018] The prior art requires three steps to achieve the desired hemming effect: 1) fold the product upward at an angle of 90°; 2) fold the 90° angle of the product inward to a -45° angle; 3) fold the -45° angle of the product to a desired angle.
[0019] After the first process of the prior art is completed, the utility model combines the second and third processes into one process. The utility model is provided with a punch bevel at the lower end of the insert punch, and the punch bevel bends the 90° angle inward to -45° by extruding the product. There is a gap between the insert punch and the pressure plate that matches the size of the folding punch. Under the premise of not changing the mold, the folding punch moves downward, and the punch bevel contacts the product and continues to extrude the -45° angle to complete the folding.
[0020] Through the above improvements, not only a molding mold is saved, but also the process is simplified: 1) Fold the product upward by 90°; 2) Fold the 90° angle of the product inward to -45° and complete the folding. This saves the cost of making molds, saves product processing time, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the negative angle state of the thick material negative angle folding forming structure of the utility model;
[0022] Figure 2 for Figure 1 A magnified view of the part A in the middle;
[0023] Figure 3 for Figure 1 A magnified view of the part B in the middle;
[0024] Figure 4 It is a schematic diagram of the thick material negative angle folding and bending forming structure of the utility model after the folding angle is completed;
[0025] Figure 5 This is a schematic diagram of the traditional mold completing the 90° angle bending state.
[0026] In the figure: 1, pressing plate; 2, bending die; 21, groove; 3, stripper plate insert; 31, insert punch; 311, punch slope; 4, folding punch; 41, punch slope; 5, product; 6, second bending die; 7, pressing insert; 8, bending punch. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.
[0028] like Figures 1 to 4 As shown, the utility model discloses a forming structure for folding and bending thick materials at negative angles, comprising a pressure plate 1, a bending die 2, a stripper plate insert 3 and a folding punch 4; the pressure plate 1 is used to fix the non-negative angle end of the product 5 at the upper horizontal plane of the bending die 2 to prevent the product from shifting during the negative angle folding process; the stripper plate insert 3 is located at the negative angle end of the product 5, and the stripper plate insert 3 completes the negative angle folding work by cooperating with the bending die 2 below; there is a gap between the stripper plate insert 3 and the pressure plate 1, and the gap is adapted to the size of the folding punch 4; before folding: the end of the product 5 after the negative angle folding extends into the gap, and the folding punch 4 is located directly above the gap; after folding: the folding punch 4 descends into the gap, and the bottom of the folding punch 4 bends the negative angle end of the product 5.
[0029] like Figure 2 As shown, the protruding end of the stripper plate insert 3 that cooperates with the bending die 2 is an insert punch 31; the width of the insert punch 31 is greater than the width of the groove 21; the insert punch 31 includes a positioning portion located on the inner side of the die and a punch slope 311 on the top of the die, and the punch slope 311 is contacted and extruded with the product 5 to bend the product 5 into the same angle as the punch slope 311.
[0030] Preferably, the width of the groove 21 is 10.5 cm.
[0031] Preferably, the width of the insert punch 31 is 12 cm.
[0032] Preferably, the distance between the pressing plate 1 and the unloading plate insert 3 is 6 cm.
[0033] Preferably, the farthest distance between the pressing plate 1 and the punch slope 311 is 8 cm.
[0034] Based on the above data, the length of the product 5 for folding the negative angle needs to be greater than 2cm and less than 8cm, ensuring that the folding punch 4 can contact the folding end and complete the folding; if the length is less than 2cm, the folding end cannot exceed the punch bevel 311, and the punch bevel 41 cannot contact the folding end, resulting in failure to complete the folding; if the length is greater than 8cm, the folding end contacts the pressing plate 1 during the folding or folding process, causing damage to the mold and reducing the service life of the mold. At the same time, in order to meet the use requirements of the molding structure, the thickness of the product material needs to be greater than 1.6mm.
[0035] Preferably, the lowermost end of the insert punch 31 does not contact the bottom end of the groove 21 to prevent collision during operation and reduce the service life of the mold.
[0036] Preferably, the angle between the male mold slope 311 and the horizontal direction is 45°.
[0037] Further preferably, the convex mold slope 311 and the positioning part of the insert punch 31 adopt rounded transition to avoid damage to the product 5 caused by the mold during the negative angle folding process.
[0038] like Figures 3-4 As shown, the lower end of the folding punch 4 is a punch slope 41 with a certain inclination angle, which is used to further squeeze the negative angle of the product 5 to obtain the folding effect. The punch slope 41 is inclined from one end close to the stripper plate insert 3 to the other end, thereby improving the folding effect.
[0039] Preferably, the angle between the punch inclined surface 41 and the horizontal direction is 10°.
[0040] Further preferably, the punch inclined surface 41 and the vertical surface of the folding punch 4 are transitioned with rounded corners to avoid damage to the product by the folding punch 4 during the folding process.
[0041] Working principle:
[0042] like Figure 5 As shown, the product 5 is folded into 90° using a conventional mold: one end of the product 5 is fastened and fixed by a second bending die 6 and a pressing insert 7, exposing the end that needs to be folded at a negative angle, and the product is folded into 90° by moving a bending punch 8;
[0043] like Figure 1As shown, replace the mold of the utility model, place the product 5 folded at 90° horizontally above the bending die 2, and align the negative angle end with the right end face of the groove 21 vertically; the pressing plate 1 and the unloading plate insert 3 move simultaneously, and the pressing plate 1 is used to fix the product 5; the insert punch 31 moves downward, and the punch inclined surface 311 contacts the product 5 and squeezes it, bending the 90° angle inward to -45°.
[0044] like Figure 4 As shown, without changing the mold, the pressing plate 1, the bending die 2 and the unloading plate insert 3 remain stationary, and the folding punch 4 moves downward. Since the product has been pressed into -45°, the punch bevel 41 contacts the product 5 and continues to extrude at a -45° angle to complete the folding.
[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A forming structure for thick material folding with negative angle, characterized in that: The forming structure comprises a pressing plate, a bending die, a stripper plate insert and a folding punch; The pressing plate is used to fix the non-negative angle end of the product on the horizontal plane of the upper end of the bending die; the stripper plate insert is located at the negative angle end of the product, and the stripper plate insert completes the negative angle folding work by cooperating with the bending die below; there is a gap between the stripper plate insert and the pressing plate, and the gap is adapted to the size of the folding punch; before folding: the negative angle end of the product extends into the gap, and the folding punch is located directly above the gap; after folding: the folding punch descends into the gap, and the bottom of the folding punch bends the end of the product after the negative angle folding.
2. The forming structure for thick material negative angle folding and bending as claimed in claim 1, characterized in that: The protruding end of the stripper plate insert is an insert punch; the width of the insert punch is greater than the width of the groove, and the insert punch includes a positioning part located on the inner side of the die and a punch slope on the top of the die. The punch slope is extruded by contact with the negative angle end of the product to fold the product into the same angle as the punch slope.
3. The forming structure for thick material negative angle folding as claimed in claim 2, characterized in that: The distance between the pressing plate and the unloading plate inlay is 6 cm.
4. The forming structure for thick material negative angle folding as claimed in claim 2, characterized in that: The farthest distance between the pressing plate and the inclined surface of the punch is 8 cm.
5. The forming structure for thick material negative angle folding and bending as claimed in claim 2, characterized in that: The angle between the inclined surface of the punch and the horizontal direction is 45°.
6. The forming structure for negative angle folding of thick materials as claimed in claim 5, characterized in that: The inclined surface of the punch and the positioning part of the insert punch adopt rounded transition.
7. The forming structure for negative angle folding of thick materials as claimed in claim 1, characterized in that: The lower end of the folding punch is a punch inclined surface.
8. The forming structure for thick material negative angle folding as claimed in claim 7, characterized in that: The punch inclined surface is inclined from one end close to the stripper plate insert to the other end.
9. The forming structure for thick material negative angle folding and bending as claimed in claim 8, characterized in that: The included angle between the punch inclined surface and the horizontal direction is 10°.
10. The forming structure for thick material negative angle folding as claimed in claim 9, characterized in that: The punch inclined surface and the stacking punch vertical surface adopt rounded corner transition.