Pneumatic squeeze riveter

Abstract

The pneumatic squeeze riveter comprises a fixing frame, a base, a pushing guide rail and a squeeze riveting assembly, the pushing guide rail is fixedly arranged on the fixing frame, the base is arranged on the pushing guide rail in a sliding mode, the squeeze riveting assembly is arranged above the pushing guide rail in a lifting mode, and the squeeze riveting assembly comprises a squeeze riveting block and a plurality of squeeze riveting heads fixedly arranged below the squeeze riveting block. The base is provided with a limiting protrusion and a plurality of pressing rivet holes, the shape of the limiting protrusion is matched with the shape of a through hole in a workpiece, the positions of the pressing rivet holes are matched with the position of a nut on the workpiece, and the nut and the workpiece are riveted through the pressing rivet head. According to the riveting device, the accurate placement position of a workpiece can be guaranteed through the arranged limiting protrusions, so that in the riveting process, nuts and the workpiece are riveted accurately, manual errors are avoided, the riveting precision and quality are improved, the multiple nuts of the workpiece are riveted at the same time, and the riveting efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of riveting processing, and in particular to a pneumatic riveting machine. Background Art

[0002] Riveting machine, also known as riveting machine, rotary riveting machine, riveting machine. It is a new type of riveting equipment developed based on the principle of cold rolling. Riveting machine rivets or expands special fasteners to metal plates or workpieces and other riveted parts by special punching force. Only one punching can replace traditional welding, drilling, tapping and other multi-processing procedures.

[0003] Nuts are common parts in life and are widely used. In the process of processing riveted parts, riveting technology is usually used to rivet nuts to the riveted parts. Under external pressure, the riveted parts cause the base material to undergo plastic deformation and squeeze into the prefabricated groove specially designed in the riveted screw and nut structure, thereby achieving a reliable connection between the two parts.

[0004] During the process of nut riveting, workers are required to pass the nuts into the holes on the riveted parts, and then place the riveted parts on the riveting machine. The riveting machine applies pressure to the nuts to squeeze the nuts into the riveted parts. However, due to the special shape of the riveted parts and the large number of nuts that need to be riveted at the same time, the position of the nut rivets is special. The existing nut riveting machines cannot meet the needs of simultaneously riveting multiple nuts at different positions on the riveted parts, and there is no function to limit the nuts, which makes it easy for them to be misaligned during riveting. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a pneumatic riveting machine.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a pneumatic riveting machine, including a fixed frame, a base, a pushing guide rail, and a riveting assembly, wherein the pushing guide rail is fixedly arranged on the fixed frame, the base is slidably arranged on the pushing guide rail, the riveting assembly can be raised and lowered above the pushing guide rail, the riveting assembly includes a riveting block and a plurality of riveting heads fixedly arranged below the riveting block, the base has a limiting protrusion and a plurality of riveting holes, the shape of the limiting protrusion matches the shape of the through hole on the workpiece, the position of the riveting hole matches the position of a nut placed on the workpiece, and the riveting head rivets the nut to the workpiece.

[0007] Furthermore, the base includes an upper riveting plate pad, a lower riveting plate pad and a plurality of elastic members, and the elastic members are arranged between the upper riveting plate pad and the lower riveting plate pad.

[0008] Furthermore, the limiting protrusion and the rivet hole are both arranged on the upper surface of the upper rivet plate pad, and a lower positioning rod is arranged in the rivet hole, and the lower positioning rod passes through the positioning hole in the nut.

[0009] Furthermore, one side of the upper riveting plate backing plate has a trapezoidal structure, and the trapezoidal structure matches the shape of the workpiece.

[0010] Furthermore, the position of the rivet head matches the position of the rivet hole, and an upper positioning rod is telescopically provided at the bottom of the rivet head. When the rivet head descends to press the nut, the upper positioning rod extends into the positioning hole.

[0011] Furthermore, the number of the rivet holes and the number of the rivet heads are both four.

[0012] Furthermore, a pushing cylinder is provided at one end of the pushing guide rail close to the rivet head, the pushing cylinder is connected to the base, and the pushing cylinder drives the base to slide back and forth along the pushing guide rail.

[0013] Furthermore, it also includes a riveting cylinder, which is connected to the riveting head, and the riveting cylinder drives the riveting head to rivet the nut and the workpiece together.

[0014] Furthermore, the lower riveting plate pad has a slide groove, and the slide groove matches the pushing guide rail.

[0015] Furthermore, it also includes a controller, and the riveting cylinder and the pushing cylinder are both electrically connected to the controller. The controller controls the pushing cylinder to push the base along the pushing guide to under the riveting head, and then controls the riveting cylinder to lower the riveting head to rivet the nut to the workpiece and then push the base back to its original position.

[0016] Implementing the embodiments of the present invention has the following beneficial effects:

[0017] By setting the limiting protrusion and the rivet hole, and the shape of the trapezoidal structure and the workpiece, the workpiece can be placed accurately, so that the nut and the workpiece are accurately riveted during the riveting process, avoiding manual errors, and improving the precision and quality of riveting, so that the workpiece can be more conveniently located at the processing position under the rivet head, thereby solving the problems of low processing precision and difficult position adjustment of the rivet head;

[0018] Riveting multiple nuts on the workpiece at the same time greatly improves the efficiency of riveting;

[0019] Good compatibility with workpieces, high riveting quality, small footprint, and safe and reliable use;

[0020] Two push rails are arranged between the lower riveting plate pad and the fixing frame, so that the base can move more smoothly under the action of the push rails, solving the problem of shaking and shifting during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of the base structure of an embodiment of the present invention;

[0023] Figure 3 is a top view of a base according to an embodiment of the present invention;

[0024] Figure 4 is a left side view of a base according to an embodiment of the present invention;

[0025] Figure 5 is a bottom view of a base according to an embodiment of the present invention;

[0026] Figure 6 is a schematic diagram of a base for placing a workpiece according to an embodiment of the present invention;

[0027] Figure 7 is a schematic diagram of a workpiece structure according to an embodiment of the present invention;

[0028] Figure 8 is a schematic diagram of a nut structure according to an embodiment of the present invention;

[0029] Fig. 9 1. It is a schematic diagram of the structure of a push guide rail and a push cylinder according to an embodiment of the present invention;

[0030] Fig.10 1. It is a schematic diagram of the structure of a pressure riveting assembly and a pressure riveting cylinder according to an embodiment of the present invention;

[0031] In the figure:

[0032] 1. Fixing frame, 2. Base, 21. Upper riveting plate pad, 211. Limiting protrusion, 212. Riveting hole, 213. Lower positioning rod, 214. Trapezoidal structure, 22. Lower riveting plate pad, 221. Slide groove, 23. Elastic member, 3. Pushing guide rail, 4. Riveting assembly, 41. Riveting block, 42. Riveting head, 421. Upper positioning rod, 5. Workpiece, 51. Through hole, 52. Nut, 521. Positioning hole, 6. Pushing cylinder, 7. Riveting cylinder. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] like Figure 1-10As shown, a pneumatic riveting machine includes a fixed frame 1, a base 2, a push guide 3, and a riveting assembly 4. The push guide 3 is fixedly arranged on the fixed frame 1, the base 2 is slidably arranged on the push guide 3, the riveting assembly 4 can be raised and lowered above the push guide 3, the riveting assembly 4 includes a riveting block 41 and a plurality of riveting heads 42 fixedly arranged below the riveting block 41, the base 2 has a limiting protrusion 211 and a plurality of riveting holes 212, the shape of the limiting protrusion 211 matches the shape of the through hole 51 on the workpiece 5, the position of the riveting hole 212 matches the position of the nut 52 on the workpiece 5, and the riveting head 42 rivets the nut 52 to the workpiece 5. Preferably, the position of the riveting head 42 matches the position of the riveting hole 212, and the number of the riveting hole 212 and the number of the riveting head 42 are both four. As shown in FIG. Figure 8 As shown, the nut 52 is in the shape of a long tube, with a hexagonal portion on the upper portion of the tube and a threaded inner wall for mating with a screw. The rivet head 42 is mated with the rivet hole 212 to rivet the hexagonal portion of the tube. The pneumatic riveting machine can rivet multiple nuts 52 of the workpiece at the same time, greatly improving the efficiency of riveting.

[0035] like Figure 2-8As shown, the base 2 includes an upper rivet plate pad 21, a lower rivet plate pad 22 and a plurality of elastic members 23, wherein the elastic member 23 is disposed between the upper rivet plate pad 21 and the lower rivet plate pad 22. The limiting protrusion 211 and the rivet hole 212 are both disposed on the upper surface of the upper rivet plate pad 21, and a lower positioning rod 213 is disposed in the rivet hole 212, and the lower positioning rod 213 passes through the positioning hole 521 in the nut 52. The bottom of the rivet head 42 is telescopically provided with an upper positioning rod 421, and the upper positioning rod 421 matches the shape of the inner wall of the nut 52. When the rivet head 42 descends to press the nut 52, the upper positioning rod 421 extends into the positioning hole 521, and is lifted and slowly retracted by the lower positioning rod 213, which can ensure that the pressing force and the inner wall of the nut 52 do not deform, so that the deformed part can only be regularly outward. The upper positioning rod 42 ensures that the upper hole of the nut 52 is not compressed by the rivet head 42, and the lower positioning rod 213 can ensure that the screw thread in the nut 52 is not compressed. At the same time, the upper positioning rod 42 is retractable and will not damage the lower positioning rod 213 when in contact with the lower positioning rod 213. One side of the upper rivet plate pad 21 has a trapezoidal structure 214, and the trapezoidal structure 214 matches the shape of the workpiece 5. By setting the limiting protrusion 211 and the rivet hole 212, and the shape of the trapezoidal structure 214 and the workpiece 5, it is possible to ensure that the workpiece 5 is placed accurately, so that the nut 52 and the workpiece 5 are accurately riveted during the riveting process, avoiding manual errors, and improving the accuracy and quality of the riveting, so that the workpiece 5 can be more conveniently located at the processing position below the rivet head 42, thereby solving the problem of low processing accuracy and difficult position adjustment of the rivet head 42. The lower rivet plate pad 22 has a slide groove 221, and the slide groove 221 matches the push guide rail 3. Two push guide rails 3 are arranged between the lower riveting plate pad 22 and the fixing frame 1, so that the base 2 can move more smoothly under the action of the push guide rails 3, solving the problem of shaking and displacement during movement.

[0036] like Fig. 9 and 10 As shown, a push cylinder 6 is provided at one end of the push guide 3 near the rivet head 42, and the push cylinder 6 is connected to the base 2, and the push cylinder 6 drives the base 2 to slide back and forth along the push guide 3. The rivet cylinder 7 is connected to the rivet head 42, and the rivet cylinder 7 drives the rivet head 42 to rivet the nut 52 and the workpiece 5 together. Preferably, a controller is also included, and the rivet cylinder 7 and the push cylinder 6 are both electrically connected to the controller, and the controller controls the push cylinder 6 to push the base 2 along the push guide 3 to the bottom of the rivet head 42, and then controls the rivet cylinder 7 to lower the rivet head 42 to rivet the nut 52 and the workpiece 5, and then push the base 2 back to its original position.

[0037] Of course, the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any modifications made according to the spirit of the main technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic riveting machine, characterized in that: The invention comprises a fixed frame (1), a base (2), a push guide rail (3), and a riveting assembly (4), wherein the push guide rail (3) is fixedly arranged on the fixed frame (1), the base (2) is slidably arranged on the push guide rail (3), the riveting assembly (4) can be raised and lowered above the push guide rail (3), the riveting assembly (4) comprises a riveting block (41) and a plurality of riveting heads (42) fixedly arranged below the riveting block (41), the base (2) has a limiting protrusion (211) and a plurality of riveting holes (212), the shape of the limiting protrusion (211) matches the shape of a through hole (51) on a workpiece (5), the position of the riveting hole (212) matches the position of a nut (52) placed on the workpiece (5), and the riveting head (42) rivets the nut (52) to the workpiece (5).

2. A pneumatic riveting machine according to claim 1, characterized in that: The base (2) comprises an upper rivet plate pad (21), a lower rivet plate pad (22) and a plurality of elastic members (23), wherein the elastic members (23) are arranged between the upper rivet plate pad (21) and the lower rivet plate pad (22).

3. A pneumatic riveting machine according to claim 2, characterized in that: The limiting protrusion (211) and the rivet hole (212) are both arranged on the upper surface of the upper rivet plate backing plate (21), and a lower positioning rod (213) is arranged in the rivet hole (212), and the lower positioning rod (213) passes through the positioning hole (521) in the nut (52).

4. A pneumatic riveting machine according to claim 2, characterized in that: One side of the upper riveting plate backing plate (21) has a trapezoidal structure (214), and the trapezoidal structure (214) matches the shape of the workpiece (5).

5. The pneumatic riveting machine according to claim 3, characterized in that: The position of the rivet head (42) matches the position of the rivet hole (212), and an upper positioning rod (421) is telescopically provided at the bottom of the rivet head (42). When the rivet head (42) descends to press the nut (52), the upper positioning rod (421) extends into the positioning hole (521).

6. The pneumatic riveting machine according to claim 1, characterized in that: The number of the rivet holes (212) and the number of the rivet heads (42) are both four.

7. The pneumatic riveting machine according to claim 1, characterized in that: A pushing cylinder (6) is provided at one end of the pushing guide rail (3) close to the rivet head (42); the pushing cylinder (6) is connected to the base (2); and the pushing cylinder (6) drives the base (2) to slide back and forth along the pushing guide rail (3).

8. The pneumatic riveting machine according to claim 1, characterized in that: It also comprises a riveting cylinder (7), wherein the riveting cylinder (7) is connected to the riveting head (42), and the riveting cylinder (7) drives the riveting head (42) to rivet the nut (52) and the workpiece (5) together.

9. The pneumatic riveting machine according to claim 2, characterized in that: The lower riveting plate pad (22) has a slide groove (221), and the slide groove (221) matches the pushing guide rail (3).

10. A pneumatic riveting machine according to any one of claims 1 to 9, characterized in that: The invention also comprises a controller, wherein the riveting cylinder (7) and the pushing cylinder (6) are both electrically connected to the controller, and the controller controls the pushing cylinder (6) to push the base (2) along the pushing guide rail (3) to below the riveting head (42), and then controls the riveting cylinder (7) to lower the riveting head (42) to rivet the nut (52) with the workpiece (5), and then pushes the base (2) back to its original position.

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