Spin-riveting installation tool

Abstract

The application discloses a spin riveting installation tool which is used for spin riveting a plate with a rivet installed in the inner side of the side wall of the plate, and comprises a mechanical arm unit provided with a first connecting part, a spin riveting tool which comprises a tool body and a second connecting part arranged at one end of the tool body, the second connecting part is connected with the first connecting part, a bearing is connected inside the tool body, an inner ring of the bearing is connected with a rotating shaft, one end of the rotating shaft away from the first connecting part is connected with a spin riveting head, and the spin riveting head can abut against the side of the side wall away from the rivet. In the application, the relative sliding between the plate and the spin riveting head during the spin riveting process is avoided, so that the cutting is avoided, and the burr is avoided. Meanwhile, the crack of the plate during the riveting process can be avoided, the height of the side wall after the riveting can be kept the same, and the precision of the plate after the riveting is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of spin riveting tools, in particular to a spin riveting installation tool. BACKGROUND

[0002] Spin riveting belongs to riveting process, which is a high-pressure processing process through a stamping machine and a special connecting die, and forms an internal inlaid dot with certain tensile and shear strength without stress concentration according to the cold extrusion deformation of the plate itself. In the existing spin riveting installation tool, the circumference of the workpiece such as rivet is continuously rolled by the eccentric rotation of the rivet head, so that the workpiece is gradually pressed on its circumference to realize the riveting effect. However, in actual use, the workpiece is always in a stressed state, so that cracks will appear on the workpiece during riveting, and the height of the workpiece cannot be kept the same due to the eccentric rotation to realize spin riveting, resulting in poor precision of the workpiece after spin riveting. SUMMARY

[0003] In order to overcome the defects in the prior art, the inventor tries to invent a structure to pre-bury the rivet in the plate and then offset the side wall of the plate inward to realize the effect of spin riveting. The pointer is driven by the CNC (Computer Numerical Control Machine Tool) to make the side wall extrude inward along the outside of the side wall, but during the whole process, there is relative sliding friction between the pointer and the plate, which will cause cutting of the plate, and further cause poor spin riveting effect, so the above technical solution is not feasible. The present application provides a spin riveting installation tool for solving one or more of the above problems.

[0004] The present application discloses a spin riveting installation tool for spin riveting a plate with a rivet installed on the inner side of the side wall of the plate, comprising: a mechanical hand unit provided with a first connecting part; a spin riveting tool comprising a tool body and a second connecting part provided at one end of the tool body, the second connecting part being connected with the first connecting part, the tool body being internally connected with a bearing, the inner ring of the bearing being connected with a rotating shaft, one end of the rotating shaft away from the first connecting part being connected with a spin riveting head, the spin riveting head being capable of abutting against the side of the side wall away from the rivet; when the spin riveting tool rotates around the rivet with the mechanical hand unit, the spin riveting head abuts against the side of the side wall away from the rivet and a static friction force is generated between the spin riveting head and the side wall, the spin riveting head rotates around its axis relative to the tool body, and in this process, the static friction force between the spin riveting head and the side wall is greater than the friction force overcome by the relative movement between the inner ring and the outer ring of the bearing.

[0005] Further, the tool body has a containing space inside, the bearing is arranged in the containing space, and the outer ring of the bearing is connected with the inner wall of the tool body, and the rotating shaft and the tool body extend along the same linear direction.

[0006] Further, the tool body is provided with a flange part near the side wall of the second connecting part, and the flange part extends outward relative to the tool body in the direction perpendicular to the extending direction of the tool body.

[0007] Further, the mechanical hand unit is a four-axis mechanical hand, and the first connecting part is arranged at the end of the mechanical hand unit.

[0008] Further, the spin riveting head has a first part capable of abutting against the side of the side wall away from the rivet, and the cross-sectional shape of the first part in the direction perpendicular to the extending direction thereof is circular.

[0009] Further, the spin riveting head further has a second part connected with the first part, the second part is arranged on the rotating shaft, the side of the second part has a biasing groove, the rotating shaft is provided with a thread hole avoiding the biasing groove, and a discharging bolt passes through the biasing groove and the thread hole avoiding and is threadedly connected with the thread hole avoiding.

[0010] Further, the first connecting part and the second connecting part are rigidly connected.

[0011] Further, the number of bearings is two, and the two bearings are arranged at intervals in the extending direction of the rotating shaft.

[0012] The beneficial effects of the present application are as follows:

[0013] The spin riveting head can abut against the plate during the process of revolving around the rivet, so that the spin riveting head can be subjected to the static friction force from the side wall of the plate during the riveting process, so that the spin riveting head revolves around the axis thereof, avoids the relative sliding between the plate and the spin riveting head during the riveting process, and avoids the generation of burrs. Meanwhile, the contact positions of different positions of the upper side wall of the plate with the spin riveting head are different during the riveting process, so that the stress of the whole workpiece can be dispersed, thereby avoiding the cracks of the plate during the riveting process, and through the above structure, the stress of different positions of the side wall can be kept the same, so that the height of the side wall after riveting can be kept the same, and the precision of the plate after riveting is improved.

[0014] In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Fig. 1 This is a schematic diagram of the riveting installation tool in an embodiment of the present invention;

[0017] Fig. 2 This is a cross-sectional schematic diagram of the riveting installation tool in an embodiment of the present invention;

[0018] Fig. 3 This is a schematic diagram of the riveting head in an embodiment of the present invention;

[0019] Fig. 4 This is a schematic diagram illustrating the structural relationship between the sheet metal and the riveting head during riveting in an embodiment of the present invention;

[0020] The reference numerals in the above figures are as follows: 1. Plate; 11. Side wall; 12. Rivet; 2. Riveting tool; 21. Tool body; 211. Accommodating space; 22. Second connecting part; 23. Bearing; 24. Shaft; 25. Riveting head; 251. First component; 252. Second component; 2521. Offset groove; 26. Flange; 27. Unloading bolt. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figs. 1 to 4 As shown, this embodiment provides a riveting installation tool for riveting a plate 1 with rivets 12 installed on its inner sidewall 11. The plate 1 can be placed on a fixed base to fix the plate 1, thereby ensuring good stability of the plate 1 during the riveting process. The riveting installation tool includes:

[0023] A robot unit (not shown in the figure) is provided with a first connecting part, which can move in the radial and circumferential directions of the side wall 11, so as to drive the riveting tool 2 installed on the first connecting part to move relative to the plate 1. The above movement effect can be achieved by the existing path setting of the robot unit, and the structure of the robot can be adjusted according to actual needs.

[0024] The riveting tool 2 includes a tool body 21 and a second connecting part 22 provided at one end of the tool body 21, and the second connecting part 22 is connected with the first connecting part, so that the riveting tool 2 can be installed on the robot unit and can move with the first connecting part. The tool body 21 can be connected with a bearing 23 inside, and the inner ring of the bearing 23 can be connected with a rotating shaft 24, so that the rotating shaft 24 can rotate relative to the tool body 21. Due to the presence of the bearing 23, the tool body 21 can be subjected to smaller friction during the rotation of the rotating shaft 24 relative to the tool body 21. One end of the rotating shaft 24 away from the first connecting part is connected with a riveting head 25, which can abut against the side of the side wall 11 away from the rivet 12, so that the static friction between the riveting head 25 and the side wall 11 is greater than the friction to be overcome during the relative movement between the inner and outer rings of the bearing 23 during the subsequent riveting process, so that the riveting head 25 and the plate 1 can always maintain a static friction state, thereby avoiding the cutting caused by the relative movement between the riveting head 25 and the plate 1.

[0025] In the embodiment, the side wall 11 forms a closed circumference, and a rivet 12 is arranged inside the circumference. During the riveting of the plate 1, the end of the mechanical arm unit first drives the riveting tool 2 to move, so that the riveting head 25 moves to the side wall 11 adjacent to the plate 1 and abuts against the side of the side wall 11 away from the rivet 12. Then, the riveting tool 2 moves inward along the radial direction of the side wall 11 with the mechanical arm unit, so that the riveting head 25 drives the side wall 11 to move inward. Then, the riveting tool 2 rotates around the rivet 12 with the mechanical arm unit, during which the riveting head 25 abuts against the side of the side wall 11 away from the rivet 12 and the static friction between the riveting head 25 and the side wall 11 is always maintained, so that the riveting head 25 rotates around the axis direction relative to the tool body 21, thereby realizing the riveting effect of deforming the side wall 11 inward as a whole. During this process, the static friction between the riveting head 25 and the side wall 11 is greater than the friction that the relative movement between the inner ring and the outer ring of the bearing 23 overcomes. Therefore, the static friction state between the riveting head 25 and the plate 1 can be always maintained, thereby avoiding the cutting caused by the relative movement between the riveting head 25 and the plate 1.

[0026] By the above structure, the riveting head 25 can abut against the plate 1 during the revolution around the rivet 12, so that the riveting head 25 can be subjected to the static friction from the side wall 11 of the plate 1 during the riveting, thereby making the riveting head 25 rotate around the axis of the riveting head 25, avoiding the cutting caused by the relative sliding between the plate 1 and the riveting head 25 during the riveting, and avoiding the generation of burrs. At the same time, since the contact positions of the different positions of the side wall 11 of the plate 1 with the riveting head 25 are different during the riveting, the stress of the workpiece as a whole can be dispersed, thereby avoiding the cracks of the plate 1 during the riveting. By the above structure, the stresses of the different positions of the side wall 11 can be kept the same, so that the heights of the side wall 11 after the riveting can be kept the same, thereby improving the precision of the plate 1 after the riveting.

[0027] Specifically, the tool body 21 can have a containing space 211 inside for accommodating the rotating shaft 24 and the bearing 23, thereby playing a protective effect on the rotating shaft 24 and the bearing 23. The bearing 23 can be arranged in the containing space 211, and the outer ring of the bearing 23 is connected with the inner wall of the tool body 21. In this embodiment, the outer ring of the bearing 23 is clamped with the inner wall of the tool body 21, so that the outer ring of the bearing 23 is relatively stationary with the tool body 21. Of course, in other alternative embodiments, the connection mode between the outer ring of the bearing 23 and the tool body 21 can be adjusted according to actual needs. The rotating shaft 24 and the tool body 21 can extend along the same straight line direction, so that the structure of the whole spin riveting tool 2 is more compact.

[0028] Specifically, the side wall 11 of the tool body 21 near the second connecting part 22 can be provided with a flange part 26, which can extend outward relative to the tool body 21 in a direction perpendicular to the extension direction of the tool body 21. The flange part 26 can abut against the part of the mechanical hand unit near the tool body 21, so that during the spin riveting process, when the spin riveting head 25 is driven by the side wall 11 to extend away from the side wall 11 along the extension direction of the tool body 21, the pressure between the flange part 26 and the mechanical hand unit also increases accordingly, so that the mechanical hand unit can have a larger contact area with the flange part 26, thereby making the spin riveting tool 2 have a better limiting effect.

[0029] Specifically, the mechanical hand unit can be a four-axis mechanical hand, and the first connecting part can be arranged at the end of the mechanical hand unit. Thus, after the first connecting part is connected with the second connecting part 22, the spin riveting tool 2 can be located at the end of the mechanical hand unit, thereby making the spin riveting tool 2 have a better activity.

[0030] Specifically, the spin riveting head 25 has a first part 251 capable of abutting against the side of the side wall 11 away from the rivet 12, and the cross-sectional shape of the first part 251 in a direction perpendicular to the extension direction thereof is circular. Thus, during the spin riveting process, the first part 251 can rotate along the circumference of the circle, so that the first part 251 can move more stably between the side wall 11, thereby improving the effect of spin riveting.

[0031] Specifically, the spin riveting head 25 also has a second part 252 connected with the first part 251, the second part 252 is arranged on the rotating shaft 24, the side of the second part 252 has a biasing groove 2521, the rotating shaft 24 is provided with a avoiding threaded hole corresponding to the biasing groove 2521, and the unloading bolt 27 passes through the biasing groove 2521 and the avoiding threaded hole and is in threaded connection with the avoiding threaded hole. So that the spin riveting head 25 can be detachably installed on the rotating shaft 24 through the unloading bolt 27, and then the spin riveting head 25 is more easily replaced and more stable during use.

[0032] Specifically, the first connecting part and the second connecting part 22 are rigidly connected. Because there is a large acting force between the spin riveting head 25 and the side wall 11 during the spin riveting process, the rigid connection can make the mechanical hand unit and the spin riveting tool 2 have a better connection effect, thereby improving the stability of the whole tool during spin riveting.

[0033] Specifically, the number of the bearing 23 is two, and the two bearings 23 are arranged at intervals in the extension direction of the rotating shaft 24. Therefore, the different positions of the rotating shaft 24 can be fixed with the tool body 21 through the plurality of bearings 23, so that the rotating shaft 24 has better stability during spin riveting.

[0034] The principle and implementation mode of the present application are described in the specific embodiments, and the above embodiment is only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the present application.

Claims

1. A riveting installation tool for riveting plates with rivets installed on their inner sidewalls, characterized in that, The utility model relates to a riveting device, comprising: a mechanical arm unit provided with a first connecting part; a riveting tool comprising a tool body and a second connecting part provided at one end of the tool body, the second connecting part being connected with the first connecting part, a bearing being connected inside the tool body, an inner ring of the bearing being connected with a rotating shaft, one end of the rotating shaft away from the first connecting part being connected with a riveting head, the riveting head being capable of abutting against a side of the side wall away from the rivet; when the riveting tool rotates around the rivet with the mechanical arm unit as the axis, the riveting head abuts against the side of the side wall away from the rivet and static friction force is generated between the riveting head and the side wall, the riveting head rotates relative to the tool body along the axial direction, in the process, the static friction force between the riveting head and the side wall is greater than the friction force overcome by the relative movement between the inner ring and the outer ring of the bearing.

2. The spin riveting installation tool according to claim 1, characterized in that the tool body has a containing space inside, the bearing is arranged in the containing space, and an outer ring of the bearing is connected with an inner wall of the tool body, the rotating shaft and the tool body extend along the same straight line direction.

3. The spin riveting installation tool according to claim 2, characterized in that a flange part is arranged on the side wall of the tool body close to the second connecting part, the flange part extends outward relative to the tool body in a direction perpendicular to the extension direction of the tool body.

4. The spin rivet installation tool of claim 1, wherein, the mechanical arm unit is a four-axis mechanical arm, and the first connecting part is arranged at the end of the mechanical arm unit.

5. The spin rivet installation tool of claim 1, wherein, the riveting head has a first part capable of abutting against the side of the side wall away from the rivet, and the cross-sectional shape of the first part in a direction perpendicular to the extension direction of the first part is circular.

6. The spin riveting installation tool according to claim 5, wherein the riveting head further has a second part connected with the first part, the second part being arranged on the rotating shaft, the side of the second part having a biasing groove, the rotating shaft being provided with a relief threaded hole corresponding to the biasing groove, a discharging bolt passing through the biasing groove and the relief threaded hole and being threadedly connected with the relief threaded hole.

7. The spin rivet installation tool of claim 1, wherein, the first connecting part and the second connecting part are rigidly connected.

8. The spin rivet installation tool of claim 1, wherein, the number of bearings is two, and the two bearings are arranged at intervals in the extension direction of the rotating shaft.

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