Stamping die capable of adjusting bending angle

Abstract

The utility model discloses a stamping die with an adjustable bending angle. The stamping die comprises a lower die, a positioning block, a side block and an upper die, the positioning block is matched with the step to press and position one end of a plate, the edge block is arranged above the lower die in a vertically back-and-forth moving mode, the swing block punch is arranged on the upper die base in a back-and-forth rotating mode along the top of the swing block punch, the arc-shaped positioning block is arranged in the arc-shaped positioning groove, and the swing block punch is arranged in the die hole. A notch is formed in one side of the lower end of the swing block punch, the second inclined face is in contact fit with the first inclined face in the bending process, the spring is arranged in the first installation hole and abuts against one side of the swing block punch, and the spring drives the swing block punch to rotate along the top of the swing block punch. The other end of the plate can freely extend in the stamping and bending process, the surface of the plate is prevented from being extruded and scratched due to bidirectional friction, and bending die marks are prevented from being generated; and plates with different bending angles can be punched by adjusting the heights of the edge blocks, so that the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a punching die with an adjustable bending angle. Background Technology

[0002] With the development of society and economy and the improvement of people's living standards, more and more products are being manufactured, many of which are made using molds. Molds are widely used in industrial production.

[0003] A mold, in industrial production, refers to various dies and tools used to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, stamping, bending, blanking, and hot pressing. In short, a mold is a tool used to create shaped objects. This tool is composed of various parts, and different molds are composed of different parts. It primarily achieves the shaping of objects by changing the physical state of the material being molded, and is often referred to as the "mother of industry."

[0004] The production process involves stamping and bending sheet metal. Current stamping dies typically consist of an upper die and a lower die. These dies work together to stamp and bend the sheet metal. The forming gap created by the upper and lower dies during stamping and bending is usually equal to the thickness of the sheet metal. The bidirectional friction during bending easily leads to surface extrusion and scratches on the sheet metal, resulting in bending marks, poor sheet quality, a high defect rate, and reduced competitiveness. Furthermore, current stamping dies can only produce sheet metal with one bending angle. When different bending angles need to be stamped, multiple sets of dies are required, increasing production costs and making die changes time-consuming and labor-intensive, causing inconvenience and failing to meet current demands. Therefore, it is necessary to research a new technical solution to improve current stamping dies. Utility Model Content

[0005] In view of this, the present invention addresses the shortcomings of the existing technology, and its main purpose is to provide a punching die with an adjustable bending angle. It can effectively solve the problems of existing punching dies, which are prone to surface extrusion and scratches on the sheet metal due to bidirectional friction during bending, resulting in bending marks on the sheet metal, poor sheet metal quality, high defect rate, and lack of competitiveness. One set of punching dies can only form sheet metal with one bending angle. When it is necessary to punch sheet metal with different bending angles, multiple sets of punching dies are required, resulting in high sheet metal production costs and time-consuming and labor-intensive die replacement.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An adjustable bending angle punch includes a lower die, a positioning block, an edge block, and an upper die;

[0008] The lower mold includes a main body and a step protruding from the upper surface of the main body, the step forming a bending groove with the main body structure;

[0009] The positioning block can be moved up and down and is located above the lower mold and next to one side of the bending groove. The positioning block and the step form a positioning gap for placing the plate. The positioning block and the step cooperate to press and position one end of the plate.

[0010] The side block can be moved up and down and is located above the lower mold and on the other side of the bending groove. The side block and the positioning block form a mold hole, which corresponds to the bending groove. The side block is provided with a first inclined surface on one side of the mold hole.

[0011] The upper die is movably mounted above the lower die, and the upper die cooperates with the lower die to stamp and bend the sheet metal. The upper die includes an upper die base, a swing block punch, and a spring. The upper die base is provided with an arc-shaped positioning groove, and a first mounting hole is opened at the lower end of the upper die base. The first mounting hole extends laterally and is located next to the arc-shaped positioning groove. The swing block punch is rotatably mounted on the upper die base along its top, and the swing block punch is set in the die hole and adapted to the die hole. The top of the swing block punch is provided with an arc-shaped positioning block, which is set in and adapted to the arc-shaped positioning groove. The lower end of the swing block punch is provided with a notch for bending the other end of the plate on the side near the step. The lower end of the swing block punch is provided with a second inclined surface on the side away from the step. When bending, the second inclined surface contacts and engages with the first inclined surface. The spring is set in the first mounting hole and abuts against one side of the swing block punch. The spring drives the swing block punch to rotate along the top of the swing block punch.

[0012] As a preferred embodiment, a second mounting hole is provided on one side of the upper end of the swing block punch, which is directly opposite to the first mounting hole. One end of the spring is disposed in the first mounting hole, and the other end of the spring is disposed in the second mounting hole, which effectively enhances the stability of the connection structure.

[0013] As a preferred embodiment, the lower end of the swing block punch is provided with a punch head, one side of which is provided with the aforementioned notch, and the other side of which is provided with a third inclined surface. The third inclined surface is located below the second inclined surface. When the swing block punch moves downward, the third inclined surface contacts and engages with the first inclined surface, which helps to guide the swing block punch.

[0014] As a preferred embodiment, the upper and lower surfaces of the edge block are formed with fixing holes for fixing with external parts, which effectively enhances the stability of the connection structure.

[0015] As a preferred embodiment, the positioning block has a square structure.

[0016] As a preferred embodiment, the upper mold base has an L-shaped structure.

[0017] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0018] By movably positioning a locating block above the lower die and located beside one side of the bending groove, this locating block, in conjunction with the step, presses and positions one end of the sheet metal. A side block is also movably positioned above the lower die and located beside the other side of the bending groove. An upper die is movably positioned above the lower die, and this upper die, in conjunction with the lower die, performs stamping and bending of the sheet metal. A swing block punch is rotatably mounted on the upper die base along its top. An arc-shaped locating block is positioned in and fits into an arc-shaped locating groove. This swing block punch is positioned in and fits into a die hole. A notch is provided at the lower end of the swing block punch near the step for bending the other end of the sheet metal. A notch is provided further away from the lower end of the swing block punch. A second inclined surface is provided on one side of the step. During bending, this second inclined surface contacts and engages with the first inclined surface. A spring is placed in the first mounting hole and abuts against one side of the swing block punch. The spring drives the swing block punch to rotate along the top of the swing block punch. This type of die applies clamping force only to one end of the sheet metal, allowing the other end of the sheet metal to extend freely during the stamping and bending process. This avoids bidirectional friction that could cause surface extrusion and scratches on the sheet metal, prevents the formation of bending marks, improves the quality of the sheet metal, reduces the defect rate, and makes the sheet metal more competitive. Furthermore, the bending angle of the sheet metal to be formed can be adjusted by adjusting the height of the edge block, allowing for the stamping of sheet metal with different bending angles. This greatly reduces production costs, and the die adjustment is convenient and quick, bringing convenience to production and meeting current needs.

[0019] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the present utility model;

[0021] Figure 2 This is a front view of a preferred embodiment of the present invention;

[0022] Figure 3 This is an exploded view of a preferred embodiment of the present invention;

[0023] Figure 4 This is a three-dimensional structural diagram of the upper mold base in a preferred embodiment of the present invention;

[0024] Figure 5 This is a three-dimensional structural diagram of the swing block punch in a preferred embodiment of the present invention;

[0025] Figure 6 yes Figure 2 An enlarged view of position A in the middle.

[0026] Explanation of reference numerals in the attached diagram:

[0027] 10. Lower mold 11. Main body

[0028] 12. Step 101. Bend groove

[0029] 20. Positioning block; 21. Positioning gap

[0030] 30. Edge piece; 31. First slope

[0031] 32. Fixing hole 301. Mold hole

[0032] 40. Upper mold 41. Upper mold base

[0033] 411. Arc-shaped positioning groove; 412. First mounting hole

[0034] 42. Swing block punch; 421. Arc-shaped positioning block

[0035] 422. Gap; 423. Second slope

[0036] 424. Second mounting hole; 425. Punch head

[0037] 426. Third inclined plane; 43. Spring

[0038] 50. Sheet material d, bending gap. Detailed Implementation

[0039] Please refer to Figures 1 to 6 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, including a lower mold 10, a positioning block 20, a side block 30, and an upper mold 40.

[0040] The lower mold 10 includes a main body 11 and a step 12 protruding from the upper surface of the main body 11. The step 12 and the main body 11 form a bending groove 101.

[0041] The positioning block 20 is movable up and down above the lower mold 10 and located on one side of the bending groove 101. The positioning block 20 and the step 12 form a positioning gap 21 for placing the plate 50. The positioning block 20 and the step 12 cooperate to press and position one end of the plate 50. In this embodiment, the positioning block 20 has a square structure.

[0042] The side block 30 is movably positioned above the lower mold 10 and on the other side of the bending groove 101. The side block 30 and the positioning block 20 together form a mold hole 301, which corresponds to the bending groove 101. The side block 30 has a first inclined surface 31 on one side of the mold hole 301. In this embodiment, the upper and lower surfaces of the side block 30 are formed with fixing holes 32 for fixing with external parts, which effectively enhances the stability of the connection structure.

[0043] The upper die 40 is movably mounted above the lower die 10, and cooperates with the lower die 10 to stamp and bend the sheet metal 50. The upper die 40 includes an upper die base 41, a swing block punch 42, and a spring 43. The upper die base 41 is provided with an arc-shaped positioning groove 411, and a first mounting hole 412 is opened at the lower end of the upper die base 41. The first mounting hole 412 extends laterally and is located beside the arc-shaped positioning groove 411. The swing block punch 42 is rotatably mounted on the upper die base 41 along the top of the swing block punch 42. The swing block punch 42 is set in the die hole 301 and is compatible with the die hole 301. The top of the swing block punch 42 is provided with an arc-shaped positioning block 421, which is located in and fits into the arc-shaped positioning groove 411. The lower end of the swing block punch 42 is provided with a notch 422 for bending the other end of the plate 50 on the side near the step 12. The lower end of the swing block punch 42 is provided with a second inclined surface 423 on the side away from the step 12. When bending, the second inclined surface 423 contacts and engages with the first inclined surface 31. The spring 43 is located in the first mounting hole 412 and abuts against one side of the swing block punch 42. The spring 43 drives the swing block punch 42 to rotate along the top of the swing block punch 42.

[0044] In this embodiment, a second mounting hole 424 is provided on one side of the upper end of the swing block punch 42, which is directly opposite to the first mounting hole 412. One end of the spring 43 is provided in the first mounting hole 412, and the other end of the spring 43 is provided in the second mounting hole 424, which effectively enhances the stability of the connection structure. A punch head 425 is provided at the lower end of the swing block punch 42. The punch head 425 has the aforementioned notch 422 on one side and a third inclined surface 426 on the other side. The third inclined surface 426 is located below the second inclined surface 423. When the swing block punch 42 moves downward, the third inclined surface 426 contacts and engages with the first inclined surface 31, which helps to guide the swing block punch 42. The upper die base 41 has an L-shaped structure.

[0045] The usage process and working principle of this embodiment are described in detail below:

[0046] First, install the lower mold 10, positioning block 20, side block 30, and upper mold 40 onto the machine. The lower mold 10 is positioned below, the side block 30 is positioned to the upper left of the lower mold 10, the positioning block 20 is positioned to the upper right of the lower mold 10, and the upper mold 40 is positioned directly above the lower mold 10. Next, adjust the side block 30 to the appropriate position by moving it up and down according to the required bending angle of the sheet metal 50. Then, place the sheet metal 50 into the positioning gap 21 (i.e., onto the step 12), and the positioning block 20 moves downwards to cooperate with the step 12 to bend the sheet metal. One end of the material 50 is pressed and positioned; the machine is started, the upper die 40 moves downward, the third inclined surface 426 of the swing block punch 42 contacts and engages with the first inclined surface 31 of the edge block 30, the upper die 40 continues to move downward, the second inclined surface 423 of the swing block punch 42 contacts and engages with the first inclined surface 31 of the edge block 30, at the same time, the notch 422 of the punch head 425 of the swing block punch 42 bends the other end of the material 50; after bending is completed, the upper die 40 and the positioning block 20 move upward to return to their original positions, and the bent material 50 can be taken out.

[0047] Working principle: Within a certain range, the lower the height of the edge block 30 is adjusted (the edge block 30 moves downward to adjust), the elasticity of the spring 43 causes the swing block punch 42 to swing to the left around the arc-shaped positioning block 421 as the center. Assuming the distance between the notch 422 and the step 12 is the bending gap d, the larger the bending gap d is, the larger the bending angle of the formed plate 50 will be. Conversely, the higher the height of the edge block 30 is adjusted (the edge block 30 moves upward to adjust), the swing block punch 42 will swing to the right around the arc-shaped positioning block 421 as the center and compress the spring 43. The smaller the bending gap d is, the smaller the bending angle of the formed plate 50 will be.

[0048] The key design feature of this utility model is:

[0049] By movably positioning a locating block above the lower die and located beside one side of the bending groove, this locating block, in conjunction with the step, presses and positions one end of the sheet metal. A side block is also movably positioned above the lower die and located beside the other side of the bending groove. An upper die is movably positioned above the lower die, and this upper die, in conjunction with the lower die, performs stamping and bending of the sheet metal. A swing block punch is rotatably mounted on the upper die base along its top. An arc-shaped locating block is positioned in and fits into an arc-shaped locating groove. This swing block punch is positioned in and fits into a die hole. A notch is provided at the lower end of the swing block punch near the step for bending the other end of the sheet metal. A notch is provided further away from the lower end of the swing block punch. A second inclined surface is provided on one side of the step. During bending, this second inclined surface contacts and engages with the first inclined surface. A spring is placed in the first mounting hole and abuts against one side of the swing block punch. The spring drives the swing block punch to rotate along the top of the swing block punch. This type of die applies clamping force only to one end of the sheet metal, allowing the other end of the sheet metal to extend freely during the stamping and bending process. This avoids bidirectional friction that could cause surface extrusion and scratches on the sheet metal, prevents the formation of bending marks, improves the quality of the sheet metal, reduces the defect rate, and makes the sheet metal more competitive. Furthermore, the bending angle of the sheet metal to be formed can be adjusted by adjusting the height of the edge block, allowing for the stamping of sheet metal with different bending angles. This greatly reduces production costs, and the die adjustment is convenient and quick, bringing convenience to production and meeting current needs.

[0050] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An adjustable bending angle die, characterized by: It includes a lower mold, positioning blocks, side blocks, and an upper mold; The lower mold includes a main body and a step protruding from the upper surface of the main body, the step forming a bending groove with the main body structure; The positioning block can be moved up and down and is located above the lower mold and next to one side of the bending groove. The positioning block and the step form a positioning gap for placing the plate. The positioning block and the step cooperate to press and position one end of the plate. The side block can be moved up and down and is located above the lower mold and on the other side of the bending groove. The side block and the positioning block form a mold hole, which corresponds to the bending groove. The side block is provided with a first inclined surface on one side of the mold hole. The upper die is movably mounted above the lower die, and the upper die cooperates with the lower die to stamp and bend the sheet metal. The upper die includes an upper die base, a swing block punch, and a spring. The upper die base is provided with an arc-shaped positioning groove, and a first mounting hole is opened at the lower end of the upper die base. The first mounting hole extends laterally and is located next to the arc-shaped positioning groove. The swing block punch is rotatably mounted on the upper die base along its top, and the swing block punch is set in the die hole and adapted to the die hole. The top of the swing block punch is provided with an arc-shaped positioning block, which is set in and adapted to the arc-shaped positioning groove. The lower end of the swing block punch is provided with a notch for bending the other end of the plate on the side near the step. The lower end of the swing block punch is provided with a second inclined surface on the side away from the step. When bending, the second inclined surface contacts and engages with the first inclined surface. The spring is set in the first mounting hole and abuts against one side of the swing block punch. The spring drives the swing block punch to rotate along the top of the swing block punch.

2. The adjustable bend angle die of claim 1, wherein: A second mounting hole is provided on one side of the upper end of the swing block punch. The second mounting hole is directly opposite the first mounting hole. One end of the spring is located in the first mounting hole, and the other end of the spring is located in the second mounting hole.

3. The adjustable bend angle die of claim 1, wherein: The lower end of the swing block punch is provided with a punch head, one side of which is provided with the aforementioned notch, and the other side of which is provided with a third inclined surface, which is located below the second inclined surface.

4. The adjustable bend angle die of claim 1, wherein: The upper and lower surfaces of the edge block are formed with fixing holes for fixing to external parts.

5. The adjustable bend angle die of claim 1, wherein: The positioning block has a square structure.

6. The adjustable bend angle die of claim 1, wherein: The upper mold base has an L-shaped structure.

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