A type of flange pressing rivet mold

Abstract

This application provides a flanging and riveting mold, relating to the field of riveting technology. It includes a lower mold base and an upper mold base. The lower mold base has a lower pad plate at its top, and a lower template plate at its top. The lower template plate has a lower mold through hole, within which a riveting punch and a lower demolding assembly are located. The lower mold through hole, the top of the riveting punch, and the top of the lower demolding assembly form a mold cavity for placing the workpiece to be riveted. The upper mold base has an upper pad plate at its bottom, with a punch and an upper demolding assembly at its bottom. The punch's outline matches the contour of the mold cavity. This invention achieves simultaneous completion of the flanging and riveting processes through the coordinated operation of the components of the lower and upper mold bases, avoiding step-by-step workpiece transfer, significantly improving processing efficiency and positioning accuracy, and increasing product qualification rate. Furthermore, a single mold integrates multiple processes, reducing equipment investment and floor space, lowering energy consumption and maintenance costs, and adapting to automated production.

Description

Technical Field

[0001] This application relates to the field of riveting technology, and more specifically, to a flanged riveting die. Background Technology

[0002] In the joining and forming processes of metal or plastic parts, flanging and riveting technology is widely used in the manufacturing fields of electronics, automobiles, and home appliances. Traditional flanging and riveting processes typically require different stamping equipment to complete the rivet pressing and flanging steps in stages. For example... Figure 1 In the prior art, for workpiece A shown, a stamping machine is usually used to press rivet B into the pre-made hole of workpiece A, and then the semi-finished product is transferred to another machine for flanging operation, so that the outer contour C of workpiece A is flanged and formed.

[0003] However, the above-mentioned step-by-step processing mode has significant drawbacks: First, during the manual transfer of semi-finished products, operational errors can easily lead to workpiece positioning deviations, affecting the flanging and riveting accuracy and reducing the product qualification rate; Second, the efficiency of step-by-step processing with multiple machines is low, increasing the equipment footprint and energy consumption, extending the production cycle, and increasing production costs; Third, the large number of manual interventions makes it difficult to achieve automated and large-scale production, and cannot meet the modern manufacturing industry's demand for efficient and high-precision production. Summary of the Invention

[0004] The purpose of this application is to provide a flanged rivet mold that can solve the technical problems mentioned in the background art.

[0005] This application provides a flanged rivet mold, including a lower mold base and an upper mold base. The lower mold base has a lower pad plate at its top, and a lower template plate at its top. The lower template plate has a lower mold through hole, and a riveting punch and a lower demolding assembly are disposed within the lower mold through hole. The lower mold through hole, the top of the riveting punch, and the top of the lower demolding assembly form a mold cavity for placing the workpiece to be riveted. The upper mold base has an upper pad plate at its bottom, and a punch and an upper demolding assembly are disposed at the bottom of the upper pad plate. The outer contour of the punch is adapted to the contour of the mold cavity.

[0006] Furthermore, the lower ejector assembly includes a lower ejector plate and a plurality of first springs. The lower ejector plate is adapted to the lower die through hole. The lower ejector plate is provided with a first clearance hole adapted to the riveting punch. The lower ejector plate is movably sleeved on the riveting punch through the first clearance hole. The plurality of first springs are evenly arranged at the bottom of the lower ejector plate.

[0007] Furthermore, the top of the lower mold base is provided with a first receiving groove corresponding to the first spring, and the lower pad is provided with a first clearance through hole corresponding to the first receiving groove. The first spring is located in the first receiving groove, the lower end of the first spring is connected to the bottom of the first receiving groove, and the upper end of the first spring passes through the first clearance through hole and is connected to the bottom of the lower ejector plate.

[0008] Furthermore, the upper demolding assembly includes an upper demolding plate and a plurality of second springs. The upper demolding plate is provided with a second clearance hole adapted to the punch. The upper demolding plate is movably sleeved on the punch through the second clearance hole. The plurality of second springs are evenly arranged on the top of the upper demolding plate.

[0009] Furthermore, the top of the upper mold base is provided with a second receiving groove corresponding to the second spring, and the upper pad is provided with a second clearance through hole corresponding to the second receiving groove. The second spring is located in the second receiving groove, the upper end of the second spring is connected to the top of the second receiving groove, and the lower end of the second spring passes through the second clearance through hole and is connected to the top of the upper ejector plate.

[0010] Furthermore, guide posts are fixed at the four corners of the upper pad, and guide holes adapted to the guide posts are provided on the upper release plate, with the guide posts movably passing through the guide holes.

[0011] Furthermore, the top of the upper mold base is provided with multiple limiting members, which are arranged around the cavity to be molded and form a placement area. The top inner side of the limiting member is provided with a guide surface to guide the workpiece to be riveted into place. The bottom of the upper ejector plate is provided with a clearance groove that is adapted to the limiting member.

[0012] Furthermore, the top of the riveting punch is provided with a recessed hole for positioning the rivet. The inner diameter of the recessed hole is adapted to the diameter of the rivet shank, and the depth of the recessed hole is less than the length of the rivet shank.

[0013] The beneficial effects of this utility model are:

[0014] This invention enables the simultaneous completion of flanging and riveting processes within the same mold through the coordinated operation of the components of the lower and upper mold bases. This eliminates the need for step-by-step workpiece transfer, reduces the number of clamping operations and equipment changeover time, and significantly improves efficiency compared to traditional processes. It avoids positioning deviations caused by manual transfer, enhances the positional accuracy of flanging and riveting, and improves product qualification rate. A single mold integrates multiple process functions, reducing the number of equipment and floor space required, lowering energy consumption and maintenance costs, and making it suitable for automated production line layouts. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the workpiece structure after processing using this application;

[0017] Figure 2 These are schematic diagrams of structures in some embodiments of this application;

[0018] Figure 3 These are cross-sectional views of some embodiments of this application;

[0019] Figure 4 This is a structural breakdown diagram of some embodiments of this application;

[0020] The reference numerals in the attached figures are as follows:

[0021] 1. Lower mold base; 2. Upper mold base; 3. Lower backing plate; 31. First clearance through hole; 4. Lower template; 41. Lower mold through hole; 5. Riveting punch; 51. Concave hole; 6. Lower demolding assembly; 61. Lower demolding template; 611. First clearance hole; 62. First spring; 7. Mold cavity; 8. Upper backing plate; 81. Second clearance through hole; 82. Guide post; 9. Punch; 10. Upper demolding assembly; 101. Upper demolding template; 1011. Second clearance hole; 1012. Guide hole; 102. Second spring; 11. First receiving groove; 12. Limiting component. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific implementation examples:

[0029] like Figure 2-4As shown, this application provides a flanged rivet mold, including a lower mold base 1 and an upper mold base 2. The lower mold base 1 has a lower pad 3 on its top, and a lower template 4 on its top. The lower template 4 has a lower mold through hole 41. A riveting punch 5 and a lower demolding assembly 6 are located inside the lower mold through hole 41. The riveting punch 5 is fixed to the top of the lower pad 3. The lower mold through hole 41, the top of the riveting punch 5, and the top of the lower demolding assembly 6 form a mold cavity 7 for placing the workpiece to be riveted. The bottom of the upper mold base 2 has an upper pad. The bottom of the upper plate 8 is equipped with a punch 9 and an upper demolding assembly 10. The outer contour of the punch 9 is adapted to the contour of the mold cavity 7. In use, the lower die base 1 of this device is fixed on the worktable of the stamping equipment, and the upper die base 2 is fixedly connected to the stamping head of the stamping equipment. The workpiece to be riveted is placed in the mold cavity 7, and the upper die base 2 moves downward with the stamping head, driving the punch 9 to move into the mold cavity 7. The outer contour of the punch 9 is adapted to the mold cavity 7 to ensure complete contact with the surface of the workpiece to be riveted. After contacting the workpiece to be riveted, pressure is applied to deform the workpiece. The edge material of the workpiece is folded along the edge of the mold cavity 7 under the action of the punch 9, forming a flanged structure at a set angle. At the same time, the riveting punch 5 holds the workpiece to be riveted and works with the punch 9 to complete the pressing action of the rivet. After the stamping is completed, the upper mold base 2 moves upward to reset, the upper demolding component 10 peels the formed workpiece from the upper mold punch 9, and the lower demolding component 6 simultaneously ejects the formed workpiece from the lower mold cavity 7, completing a single processing cycle. Through the coordinated action of the various components of the lower mold base 1 and the upper mold base 2, the flanging and riveting processes are completed simultaneously in the same mold, eliminating the need to transfer the workpiece step by step, reducing the number of clamping operations and equipment changeover time. Compared with traditional processes, efficiency is significantly improved, avoiding positioning deviations caused by manual transfer, improving the positional accuracy of flanging and riveting and the product qualification rate. A single mold integrates multiple process functions, reducing the number of equipment and floor space, reducing energy consumption and maintenance costs, and is suitable for automated production line layout.

[0030] like Figure 3 and Figure 4As shown, the lower ejector assembly 6 includes a lower ejector plate 61 and multiple first springs 62. The lower ejector plate 61 is adapted to the lower die through hole 41. The lower ejector plate 61 is provided with a first clearance hole 611 adapted to the riveting punch 5. The lower ejector plate 61 is movably sleeved on the riveting punch 5 through the first clearance hole 611. The multiple first springs 62 are evenly arranged at the bottom of the lower ejector plate 61. Before stamping, the lower ejector plate 61 is located in the lower die through hole 41 and maintains a relative position with the riveting punch 5, relying on the supporting force of the first springs 62. The first clearance hole 611 of the lower ejector plate 61 is sleeved on the riveting punch 5 without affecting the normal support of the riveting punch 5 for the workpiece to be riveted. When the stamping equipment drives the upper die base 2 to move downward to perform flanging pressing... During riveting, the workpiece is pressed downward by the pressure of the punch 9 against the lower ejector plate 61. The lower ejector plate 61 moves downward against the elastic force of the first spring 62, and the first spring 62 is compressed. At this time, the lower ejector plate 61 is in close contact with the workpiece to be riveted, and the bottom of the lower ejector plate 61 presses against the top of the lower pad 3, providing stable support for the workpiece to be riveted and assisting in completing the flanging and riveting process. After the stamping is completed, the upper die seat 2 moves upward to reset. The formed workpiece, which has lost the pressure of the punch 9, no longer presses against the lower ejector plate 61. The compressed first spring 62 releases its elastic potential energy and pushes the lower ejector plate 61 upward along the riveting punch 5, thereby ejecting the formed workpiece from the lower die through hole 41 and realizing automatic demolding so that the next stamping operation can be carried out.

[0031] like Figure 2-4 As shown, the top of the lower mold base 1 is provided with a first receiving groove 11 corresponding to the first spring 62, and the lower pad 3 is provided with a first clearance through hole 31 corresponding to the first receiving groove 11. The first spring 62 is located in the first receiving groove 11, the lower end of the first spring 62 is connected to the bottom of the first receiving groove 11, and the upper end of the first spring 62 passes through the first clearance through hole 31 and is connected to the bottom of the lower ejector plate 61. The first receiving groove 11 forms a rigid positioning for the lower end of the spring, and the first clearance through hole 31 forms a guide for the upper end of the spring, ensuring that the first spring 62 always extends and retracts in the vertical direction, avoiding the lower ejector plate 61 from shifting, and improving the stability of the demolding action and the overall accuracy of the mold.

[0032] like Figure 2-4As shown, the upper ejection assembly 10 includes an upper ejection plate 101 and multiple second springs 102. The upper ejection plate 101 is provided with a second clearance hole 1011 adapted to the punch 9. The upper ejection plate 101 is movably sleeved on the punch 9 through the second clearance hole 1011. The multiple second springs 102 are evenly arranged on the top of the upper ejection plate 101. Initially, the upper ejection plate 101 is sleeved on the outside of the punch 9 through the second clearance hole 1011. The multiple second springs 102 are connected to the lower part of the upper die base 2, so that the upper ejection plate 101 and the head of the punch 9 maintain a certain distance, reserving space for the workpiece to be riveted to enter the die during stamping. When the upper die base 2 moves downward, the punch 9 moves downward with the upper die base 2, pushing the workpiece to be riveted to contact the lower die. Related components (such as the riveting punch 5 and the outer contour of the mold cavity 7) are flanged and riveted. At this time, the workpiece to be riveted generates an upward reaction force on the upper ejector plate 101. The upper ejector plate 101 overcomes the elastic force of the second spring 102 and moves upward along the punch 9. The second spring 102 is compressed, so that the punch 9 can completely press the workpiece and complete the forming process. After the stamping is completed, the upper mold base 2 moves upward and resets, the punch 9 is separated from the formed workpiece, the compressed second spring 102 releases its elastic potential energy, pushes the upper ejector plate 101 to move downward along the punch 9, and peels the formed workpiece off the surface of the punch 9 to achieve automatic demolding. This avoids the punch 9 and the workpiece from sticking due to extrusion deformation, ensures smooth demolding of the workpiece, and reduces manual intervention and scrap rate.

[0033] like Figure 2-4 As shown, the top of the upper mold base 2 is provided with a second receiving groove (not shown in the figure) corresponding to the second spring 102. The upper pad 8 is provided with a second clearance through hole 81 corresponding to the second receiving groove. The second spring 102 is located in the second receiving groove. The upper end of the second spring 102 is connected to the top of the second receiving groove. The lower end of the second spring 102 passes through the second clearance through hole 81 and is connected to the top of the upper demolding mold plate 101. The second receiving groove forms a rigid positioning for the upper end of the second spring 102. The second clearance through hole 81 forms a guide for the lower end of the second spring 102. The double constraint ensures that the spring can stably extend and retract in the vertical direction, avoids the upper demolding mold plate 101 from shifting or rotating, and improves the accuracy and reliability of the demolding action.

[0034] like Figure 4 As shown, guide posts 82 are fixed at the four corners of the upper pad 8. The upper ejector plate 101 is provided with guide holes 1012 that are adapted to the guide posts 82. The guide posts 82 move through the guide holes 1012. The guide posts 82 bear the lateral force when the upper ejector plate 101 moves, reducing the risk of the second spring 102 twisting or breaking due to bearing lateral load, and improving the stability of the upper ejector plate moving up and down.

[0035] like Figure 2-4As shown, the top of the upper mold base 2 is provided with multiple limiting members 12. The multiple limiting members 12 are arranged around the mold cavity 7 and form a placement area. The top inner side of the limiting member 12 is provided with a guide surface to guide the workpiece to be riveted into the mold cavity 7. The bottom of the upper ejector plate 101 is provided with a relief groove that matches the limiting member 12. The guide surface of the limiting member 12 plays a guiding role, which can realize the quick loading of the workpiece to be riveted into the mold cavity 7 and improve the feeding efficiency.

[0036] like Figure 2-4 As shown, the top of the riveting punch 5 is provided with a recessed hole 51 for positioning the rivet. The inner diameter of the recessed hole 51 is adapted to the diameter of the rivet shank, and the depth of the recessed hole 51 is less than the length of the rivet shank. The recessed hole 51 achieves the positioning of the rivet through size adaptation, avoiding the tilting or offset of the rivet when manually feeding material, and ensuring the accuracy of rivet pressing.

[0037] For ease of graphical representation, Figure 4 The first spring 62, the second spring 102, and the bolts used to fix the relevant components are not shown.

[0038] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A flanged rivet die, characterized in that: The device includes a lower die base and an upper die base. The lower die base has a lower pad plate on its top, and a lower template plate on its top. The lower template plate has a lower die through hole, and a riveting punch and a lower demolding assembly are disposed within the lower die through hole. The lower die through hole, the top of the riveting punch, and the top of the lower demolding assembly form a die cavity for placing the workpiece to be riveted. The upper die base has an upper pad plate at its bottom, and a punch and an upper demolding assembly are disposed at the bottom of the upper pad plate. The outer contour of the punch is adapted to the contour of the die cavity.

2. The flange pressing rivet mold according to claim 1, characterized in that: The lower ejection assembly includes a lower ejection plate and a plurality of first springs. The lower ejection plate is adapted to the lower die through hole. The lower ejection plate is provided with a first clearance hole adapted to the riveting punch. The lower ejection plate is movably sleeved on the riveting punch through the first clearance hole. The plurality of first springs are evenly arranged at the bottom of the lower ejection plate.

3. The flange pressing rivet mold according to claim 2, characterized in that: The top of the lower mold base is provided with a first receiving groove corresponding to the first spring, and the lower pad is provided with a first clearance through hole corresponding to the first receiving groove. The first spring is located in the first receiving groove, the lower end of the first spring is connected to the bottom of the first receiving groove, and the upper end of the first spring passes through the first clearance through hole and is connected to the bottom of the lower ejector plate.

4. The flange pressing rivet mold according to claim 1, characterized in that: The upper demolding assembly includes an upper demolding plate and a plurality of second springs. The upper demolding plate is provided with a second clearance hole adapted to the punch. The upper demolding plate is movably sleeved on the punch through the second clearance hole. The plurality of second springs are evenly arranged on the top of the upper demolding plate.

5. The flange pressing rivet mold according to claim 4, characterized in that: The top of the upper mold base is provided with a second receiving groove corresponding to the second spring, and the upper pad is provided with a second clearance through hole corresponding to the second receiving groove. The second spring is located in the second receiving groove, the upper end of the second spring is connected to the top of the second receiving groove, and the lower end of the second spring passes through the second clearance through hole and is connected to the top of the upper ejector plate.

6. The flange pressing rivet mold according to claim 5, characterized in that: Guide posts are fixed at the four corners of the upper pad, and guide holes adapted to the guide posts are provided on the upper demolding template. The guide posts movably pass through the guide holes.

7. The flange pressing rivet mold according to claim 1, characterized in that: The top of the upper mold base is provided with multiple limiting members. The multiple limiting members are arranged around the mold cavity and form a placement area. The inner top of the limiting members is provided with a guide surface to guide the workpiece to be riveted into place. The bottom of the upper ejector plate is provided with a relief groove that matches the limiting members.

8. The flange pressing rivet mold according to claim 1, characterized in that: The top of the riveting punch has a recessed hole for positioning the rivet. The inner diameter of the recessed hole is adapted to the diameter of the rivet shank, and the depth of the recessed hole is less than the length of the rivet shank.

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