Metal sheet riveting device

Abstract

The utility model aims to disclose a metal sheet riveting device, which relates to the technical field of metal sheet riveting and is characterized in that an upper die assembly is provided with a positioning pin in a vertical state; the first metal sheet is provided with at least one riveting column, and the second metal sheet is provided with at least one riveting hole; the lower die assembly comprises a lower die base and a fixing block, a first spring and an ejector rod which are in a vertical state are arranged on the lower die base, a riveting punch in a vertical state is arranged on the fixing block, and the end face of the riveting punch is a conical face. The floating assembly comprises a floating block, and the floating block comprises a first avoiding hole and a second avoiding hole; the riveting device has the technical effects that after the first metal sheet and the second metal sheet are positioned by the positioning needle, the riveting column extends into the riveting hole, then the end part of the riveting column is riveted by the conical surface of the riveting punch, and the end part of the riveting column is extruded by the concave conical surface and is expanded, so that uniform riveting is realized, cracks are avoided, and the riveting quality is improved. And the appearance quality of the metal sheet is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of metal sheet riveting, in particular to a metal sheet riveting device. Background Art

[0002] With the rapid development of 3C electronics and precision machining, the shapes of metal sheets have become more diverse. Riveting metal sheets together through a riveted structure is one way to form composite metal sheets. Currently, after riveting, cracks are easily formed around the rivet points due to the intense riveting pressure, affecting the appearance quality of the metal sheet.

[0003] In view of this, it is necessary to develop a metal sheet riveting device. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of the present utility model is to disclose a metal sheet riveting device.

[0005] To achieve the above-mentioned object of the invention, the utility model provides a metal sheet riveting device, comprising an upper die assembly, a floating assembly, a lower die assembly, a first metal sheet and a second metal sheet;

[0006] A vertical positioning pin is provided on the upper mold assembly;

[0007] The first metal sheet is provided with at least one rivet column, the second metal sheet is provided with at least one rivet hole, the first metal sheet is provided with a first positioning hole, and the second metal sheet is provided with a second positioning hole;

[0008] The lower die assembly includes a lower die base and a fixed block, a first spring and a push rod are arranged in a vertical position on the lower die base, and a riveting punch is arranged in a vertical position on the fixed block, and the end face of the riveting punch is a conical surface;

[0009] The floating assembly includes a floating block, and the floating block includes a first avoidance hole allowing the positioning pin to pass through and a second avoidance hole allowing the riveting column to pass through;

[0010] The push rod passes through and exceeds the fixed block, and the end of the push rod abuts against the bottom of the floating block.

[0011] Preferably, the rivet column extends into the rivet hole, and the end of the rivet column exceeds the rivet hole.

[0012] Preferably, the second metal sheet is a spring sheet.

[0013] Preferably, the height of the end of the riveting column is 1mm-2mm.

[0014] Preferably, the lower mold assembly further includes a lower mold plate, and the fixing block is mounted on the lower mold plate.

[0015] Preferably, the upper mold assembly has a first lowering position and a second lowering position.

[0016] Preferably, when the upper die assembly is located at the first descending position, the positioning pin passes through the first positioning hole, the second positioning hole and the first avoidance hole in sequence, and synchronously, the riveting column extends into the riveting hole;

[0017] The first metal sheet and the second metal sheet are positioned between an upper die assembly and the slider.

[0018] Preferably, when the upper mold assembly is located at the second descending position, the upper mold assembly presses down the floating block, the first metal sheet and the second metal sheet, and the floating block presses down the ejector rod;

[0019] The end of the riveting column during the riveting pressing process of the riveting punch.

[0020] Preferably, an inwardly concave conical surface is formed by riveting at the end of the riveting column, and the inwardly concave conical surface squeezes the end of the riveting column and expands it.

[0021] Preferably, the floating block further includes a third avoidance hole for accommodating the second metal sheet.

[0022] Compared with the prior art, the technical effects of this utility model are as follows:

[0023] After the first metal sheet and the second metal sheet of the utility model are positioned by the positioning needle, the rivet pressing column extends into the rivet pressing hole, and the end of the rivet pressing column exceeds the rivet pressing hole. The end of the rivet pressing column is then riveted by the conical surface of the riveting punch, and an inward conical surface is formed at the end of the rivet pressing column. The inward conical surface squeezes the end of the rivet pressing column and expands it, thereby achieving uniform riveting without cracks and affecting the appearance quality of the metal sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the metal sheet riveting device of the utility model.

[0026] Figure 2 This utility model Figure 1 A schematic diagram of the enlarged structure.

[0027] Figure 3It is a schematic diagram of the three-dimensional structure of the utility model after the first metal sheet and the second metal sheet are riveted together.

[0028] Figure 4 It is a schematic diagram of the mold opening state of the upper mold assembly and the lower mold assembly of the utility model.

[0029] Figure 5 This is a schematic diagram of the upper mold assembly of the present invention when it is located in the first descending position.

[0030] Figure 6 This is a schematic diagram of the upper mold assembly of the present invention when it is located in the second lowered position.

[0031] Among them, 1. upper mold assembly; 11. positioning pin; 2. floating assembly; 21. floating block; 211. first avoidance hole; 212. second avoidance hole; 213. third avoidance hole; 3. lower mold assembly; 31. lower mold base; 311. conical surface of riveting punch; 312. ejector pin; 313. end of ejector pin; 32. fixing block; 33. riveting punch; 331. end face of riveting punch; 34. lower template; 4. first metal sheet; 41. riveting column; 411. end of riveting column; 412. concave conical surface; 42. first positioning hole; 5. second metal sheet; 51. riveting hole; 52. second positioning hole. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the various embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in this field based on these embodiments are all within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0034] Example 1

[0035] Ginseng Figures 1 to 6 As shown, this embodiment discloses a specific implementation of a metal sheet riveting device.

[0036] This embodiment provides a metal sheet riveting device. Figures 1 to 6As shown, it includes an upper mold assembly 1, a floating assembly 2, a lower mold assembly 3, a first metal sheet 4 and a second metal sheet 5; a positioning pin 11 in a vertical state is set on the upper mold assembly 1; the first metal sheet 4 is provided with at least one rivet pressing column 41, the second metal sheet 5 is provided with at least one rivet pressing hole 51, the first metal sheet 4 is provided with a first positioning hole 42, and the second metal sheet is provided with a second positioning hole 52; the lower mold assembly 3 includes a lower mold base 31 and a fixed block 32, and a first spring 311 and a push rod in a vertical state are set on the lower mold base 31 312, the fixed block 32 is provided with a vertical riveting punch 33, and the end face 331 of the riveting punch is a conical surface; the floating assembly 2 includes a floating block 21, the floating block 21 includes a first avoidance hole 211 allowing the positioning pin 11 to pass through and a second avoidance hole 212 allowing the riveting column 41 to pass through, and the floating block 21 also includes a third avoidance hole 213 for accommodating the second metal sheet 5; the push rod 312 passes through and exceeds the fixed block 32, and the end 313 of the push rod abuts against the bottom of the floating block 21.

[0037] Specifically, in this embodiment, see Figures 1 to 3 The first metal sheet 4 is provided with three rivet pressing columns 41, the second metal sheet 5 is provided with three rivet pressing holes 51, the second metal sheet 5 is a spring sheet, the three rivet pressing columns 41 are aligned with the three rivet pressing holes 51, the three rivet pressing holes 51 are distributed in an isosceles triangle, and the second avoidance holes 212 are provided with three and are also distributed in an isosceles triangle; the metal sheet riveting principle is as follows: see Figure 1 、 Figures 4 to 6 The lower mold assembly 3 further includes a lower mold plate 34, and the fixed block is mounted on the lower mold plate 34; the upper mold assembly 1 has a first lowering position and a second lowering position; see Figure 5 When the upper mold assembly 1 is located at the first lowered position, the positioning pin 11 passes through the first positioning hole 42, the second positioning hole 52 and the first avoidance hole 211 in sequence. Simultaneously, the rivet pressing column 41 extends into the rivet pressing hole 51. The first metal sheet 4 and the second metal sheet 5 are positioned between the upper mold assembly 1 and the floating block 21. The end 411 of the rivet pressing column protrudes from the rivet pressing hole 51. The height of the end 411 of the rivet pressing column is 1 mm to 2 mm, that is, the height of the rivet pressing column 41 protrudes from the second metal sheet 5 by 1 mm to 2 mm. Figure 6When the upper mold assembly 1 is located in the second descending position, the upper mold assembly 1 presses down the floating block 21, the first metal sheet 4 and the second metal sheet 5, and the floating block 21 presses down the push rod 312; the end portion 411 of the riveting column during the riveting pressing process of the riveting punch 33, since the height of the end portion 411 of the riveting column is 1mm-2mm, during the riveting process of the riveting punch 33, an inward conical surface 412 is formed at the end portion 411 of the riveting column by riveting, and the inward concave conical surface 412 squeezes the end portion 411 of the riveting column and expands it, and the expanded end portion 411 of the riveting column rivets the first metal sheet 4 and the second metal sheet 5 together; since the end face 331 of the riveting punch is a conical surface, it gradually expands the end portion 411 of the riveting column during the process of riveting the end portion 411 of the riveting column, so that the end portion 411 of the riveting column expands evenly to the surrounding areas, no cracks will appear, and the appearance quality of the metal sheet will not be affected.

[0038] Through this embodiment, during the process of the upper mold assembly 1 descending to the first descending position, the first metal sheet 4 and the second metal sheet 5 are precisely positioned between the upper mold assembly 1 and the floating block 21 through the cooperation of the positioning pin 11, the first positioning hole 42, the second positioning hole 52 and the first avoidance hole 211, as well as the cooperation of the rivet column 41 and the rivet hole 51; during the process of the upper mold assembly 1 descending to the second descending position, the conical surface 331 of the riveting punch rivets the end 411 of the riveting column, and a concave conical surface 412 is formed at the end 411 of the riveting column. The concave conical surface 412 squeezes the end 411 of the riveting column and expands it, thereby achieving uniform riveting without cracks and affecting the appearance quality of the metal sheet.

Claims

1. A metal sheet riveting device, characterized in that: It includes an upper mold assembly, a floating assembly, a lower mold assembly, a first metal sheet and a second metal sheet; A vertical positioning pin is provided on the upper mold assembly; The first metal sheet is provided with at least one rivet column, the second metal sheet is provided with at least one rivet hole, the first metal sheet is provided with a first positioning hole, and the second metal sheet is provided with a second positioning hole; The lower die assembly includes a lower die base and a fixed block, a first spring and a push rod are arranged in a vertical position on the lower die base, and a riveting punch is arranged in a vertical position on the fixed block, and the end face of the riveting punch is a conical surface; The floating assembly includes a floating block, and the floating block includes a first avoidance hole allowing the positioning pin to pass through and a second avoidance hole allowing the riveting column to pass through; The push rod passes through and exceeds the fixed block, and the end of the push rod abuts against the bottom of the floating block.

2. The metal sheet riveting device according to claim 1, characterized in that: The rivet pressing column extends into the rivet pressing hole, and the end of the rivet pressing column exceeds the rivet pressing hole.

3. The metal sheet riveting device according to claim 2, characterized in that: The second metal sheet is a spring sheet.

4. The metal sheet riveting device according to claim 2, characterized in that: The height of the end of the riveting column is 1mm-2mm.

5. The metal sheet riveting device according to any one of claims 1 to 4, characterized in that: The lower mold assembly also includes a lower mold plate, and the fixing block is installed on the lower mold plate.

6. The metal sheet riveting device according to any one of claims 1 to 4, characterized in that: The upper mold assembly has a first lowering position and a second lowering position.

7. The metal sheet riveting device according to claim 6, characterized in that: When the upper die assembly is located at the first descending position, the positioning pin passes through the first positioning hole, the second positioning hole and the first avoidance hole in sequence, and synchronously, the riveting column extends into the riveting hole; The first metal sheet and the second metal sheet are positioned between an upper die assembly and the slider.

8. The metal sheet riveting device according to claim 7, characterized in that: When the upper mold assembly is located at the second descending position, the upper mold assembly presses down the floating block, the first metal sheet and the second metal sheet, and the floating block presses down the ejector pin; The end of the riveting column during the riveting pressing process of the riveting punch.

9. The metal sheet riveting device according to claim 8, characterized in that: An inwardly concave conical surface is formed at the end of the rivet pressing column by riveting, and the inwardly concave conical surface squeezes the end of the rivet pressing column and expands it.

10. The metal sheet riveting device according to claim 6, characterized in that: The floating block further includes a third avoidance hole for accommodating the second metal sheet.

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