Single-side friction riveting gun and system

Abstract

A single-side connected self-piercing friction riveting welding gun and system, including: a rotating motor, an electric cylinder, a transmission mechanism, a spline shaft, a sliding seat and a driving shaft, wherein: the spline shaft is connected to the rotating motor through the transmission mechanism to realize rotation and connected to the electric cylinder to realize stepping, the spline shaft is connected to the driving shaft through the sliding seat, and a nail feeding mechanism is provided on the side of the driving shaft. The device realizes the automatic nail feeding and riveting work, which not only improves the production efficiency, but also improves the qualified rate of the riveted joints, and realizes the flexible riveting work of the equipment.

Description

Technical Field

[0001] The utility model relates to a technology in the field of single-side connection, in particular to a single-side connection friction riveting welding gun and a system. Background Art

[0002] Lightweight structures such as light alloy castings and extruded profiles are widely used in the manufacture of shells of automobiles, locomotives, rockets, etc. due to their significant advantages over sheet materials in terms of thin-walled structural stiffness. However, when connecting closed / semi-closed profiles or light alloy castings, bilateral connection is difficult to achieve due to space limitations, and unilateral connection technology is required. Existing unilateral friction riveting and welding equipment manually places nails and rivets, and can only rivet one rivet at a time. It is necessary to manually place rivets on the riveting and welding equipment continuously, which is labor-intensive and inefficient. In addition, due to the manual gluing of rivets, the heat generated during the riveting and welding process causes a significant impact on the appearance quality of the rivet surface joints. Third, the structure of the gun head of the existing equipment is not compact enough, and it is impossible to rivet and weld workpieces with bending features. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model proposes a single-side connection friction riveting welding gun and system, which realizes the automated nail supply and riveting welding work, not only improves the production efficiency, but also improves the qualified rate of riveted joints, and realizes the flexible riveting welding work of the equipment.

[0004] The utility model is realized by the following technical solutions:

[0005] The utility model relates to a single-side connected friction riveting welding gun, comprising: a rotating motor, an electric cylinder, a transmission mechanism, a spline shaft, a sliding seat and a driving shaft, wherein: the spline shaft is respectively connected with the rotating motor through the transmission mechanism to realize rotation and connected with the electric cylinder to realize stepping, the spline shaft is connected with the driving shaft through the sliding seat, and a nail feeding mechanism is arranged on the side of the driving shaft.

[0006] The driving shaft comprises: a driving rod with a hollow structure and a driving head arranged at the end thereof, wherein: the end shape of the driving head matches the rivet, and a through hole is arranged at the center of the driving head and is connected to the driving rod to realize vacuum suction of the rivet.

[0007] The nail feeding mechanism comprises: a nail feeding tube, a flow channel, a clamping claw cylinder and a clamping claw pair, wherein: the rivet slides between the clamping claw pair through the nail feeding tube and the flow channel, and the clamping claw cylinder is connected to the clamping claw pair and drives it to open and close.

[0008] The utility model relates to a control system based on the above-mentioned single-sided connection friction riveting welding gun, comprising: a mechanical arm connected to the single-sided connection friction riveting welding gun and a power supply, a controller, and an operating end connected in sequence, wherein: a torque sensor connected to the controller is provided between the spline shaft and the drive shaft of the single-sided connection friction riveting welding gun; a pressure sensor connected to the controller is provided between the electric cylinder and the transmission mechanism of the single-sided connection friction riveting welding gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a simplified structural diagram of the utility model;

[0010] Figure 2 It is a cross-sectional view of the utility model;

[0011] Figure 3 is a schematic diagram of the drive shaft;

[0012] Figure 4 It is a schematic diagram of the drive head;

[0013] Figure 5 It is a schematic diagram of the nail feeding mechanism;

[0014] Figure 6 Schematic diagram of a pair of grippers (a) and a single gripper (b);

[0015] Figure 7 It is a schematic diagram of the embodiment system;

[0016] In the figure: rotating motor 1, electric cylinder 2, transmission mechanism 3, driven pulley 301, spline shaft 4, sliding seat 5, driving shaft 6, driving rod 601, driving head 602, torque sensor 7, pressure sensor 8, rivet 9, pressing sleeve 10, nail feeding mechanism 11, nail feeding tube 111, flow channel 112, clamping cylinder 113, clamping jaw pair 114, connecting part 12, robotic arm 13, power supply 14, controller 15, operating end 16. DETAILED DESCRIPTION

[0017] like Figure 1 and Figure 2 As shown, a single-side connection friction riveting welding gun involved in this embodiment includes: a rotating motor 1, an electric cylinder 2, a transmission mechanism 3, a spline shaft 4, a sliding seat 5 and a driving shaft 6, wherein: the spline shaft 4 is connected to the rotating motor 1 through the transmission mechanism 3 to realize rotation and connected to the electric cylinder 2 to realize stepping, the spline shaft 4 is connected to the driving shaft 6 through the sliding seat 6, and a nail feeding mechanism 11 is provided on the side of the driving shaft 6.

[0018] like Figure 3 and Figure 4As shown, the driving shaft 6 includes: a driving rod 601 with a hollow structure and a driving head 602 arranged at its end, wherein: the end shape of the driving head 602 matches the rivet 9, and a through hole is provided in the center of the driving head 602 and is connected to the driving rod 601 to realize vacuum rivet suction.

[0019] like Figure 4 As shown, the matching means that the end of the driving head 602 is arranged in the contoured slot 6 corresponding to the driving tooth shape of the rivet 9 to engage the rivet.

[0020] A hexagonal blind hole is provided at the center of the end of the driving head 602 to facilitate installation or removal of the driving head.

[0021] The outside of the driving shaft 6 is provided with a connecting piece 12 , the lower end of the connecting piece 12 is provided with a pressing sleeve 10 , and the driving sleeve is coaxial with the driving shaft 6 .

[0022] like Figure 5 As shown, the nail feeding mechanism 11 includes: a nail feeding tube 111, a flow channel 112, a clamping cylinder 113 and a clamping pair 114, wherein: the rivet 9 slides between the clamping pair 114 through the nail feeding tube 111 and the flow channel 112, and the clamping cylinder 113 is connected to the clamping pair 114 and drives it to open and close.

[0023] like Figure 6 a and Figure 6 As shown in b, the pair of clamping jaws 114 are two clamping jaws with symmetrical structures.

[0024] Each clamping jaw is provided with a semicircular first groove T1, which is communicated with the flow channel and is used for positioning the rivets blown into the rivet feeding mechanism.

[0025] A positioning surface T2 is provided at the end of each clamping jaw, which is used to accurately position the clamping jaw in the clamping direction when the clamping jaw is clamped. Combined with the first groove T1, the rivet position is accurately positioned, thereby ensuring the coaxiality of the axis of the rivet 9 and the axis of the drive head 602.

[0026] A second groove T3 is provided above the first groove T1 of each clamping jaw, so as to avoid interference caused by the driving head touching the clamping jaw pair 114 when the rivet 9 is adsorbed and engaged with the driving head 602 .

[0027] like Figure 1 and Figure 7As shown, this embodiment involves a system based on the above-mentioned single-sided connection friction riveting welding gun, including: a mechanical arm 13 connected to the single-sided connection friction riveting welding gun, and a power supply 14, a controller 15, and an operating end 16 connected in sequence, wherein: a torque sensor 7 connected to the controller 15 is provided between the spline shaft 4 and the drive shaft 6 of the single-sided connection friction riveting welding gun; a pressure sensor 8 connected to the controller 15 is provided between the electric cylinder 2 and the transmission mechanism 3 of the single-sided connection friction riveting welding gun.

[0028] The working process of this system is as follows: the rivets are automatically delivered to the drive shaft by an automatic rivet feeding machine and blown with high-pressure air, and then the rivets are adsorbed on the drive head by negative pressure rivet suction, thereby realizing automatic rivet feeding, reducing the time for the equipment to wait for rivets, and avoiding the danger of manually installing rivets on the rivet head, reducing the labor intensity of the operator, and improving production efficiency. By optimizing the structural design, the friction riveting welding gun is more compact where it contacts the workpiece, avoiding interference problems when riveting bent workpieces. In addition, due to the use of structural and lightweight design, the weight and volume of the friction riveting welding gun are reduced, and it can be set on the arm of an industrial robot to realize flexible riveting work. In addition, the use of negative pressure rivet suction also avoids the appearance quality problems caused by manually using fixing glue to stick the rivets to the drive head.

[0029] The above-mentioned specific implementation can be partially adjusted in different ways by those skilled in the art without departing from the principle and purpose of the utility model. The protection scope of the utility model shall be based on the claims and shall not be limited by the above-mentioned specific implementation. Each implementation scheme within its scope shall be subject to the constraints of the utility model.

Claims

1. A single-side connection friction riveting welding gun, characterized in that: include: A rotating motor, an electric cylinder, a transmission mechanism, a spline shaft, a sliding seat and a driving shaft, wherein: the spline shaft is connected to the rotating motor through the transmission mechanism to realize rotation and connected to the electric cylinder to realize stepping, the spline shaft is connected to the driving shaft through the sliding seat, and a nail feeding mechanism is provided on the side of the driving shaft; The driving shaft comprises: a driving rod with a hollow structure and a driving head arranged at the end thereof, wherein: the shape of the end of the driving head matches the rivet, and a through hole is arranged at the center of the driving head and is connected to the driving rod to realize vacuum suction of the rivet; The matching means that the end of the driving head is arranged in a contoured slot corresponding to the driving tooth shape of the rivet to engage the rivet.

2. The single-side connection friction riveting welding gun according to claim 1 is characterized in that: A hexagonal blind hole is arranged at the center of the end of the driving head.

3. The single-side connection friction riveting welding gun according to claim 1 is characterized in that: A connecting piece is arranged outside the driving shaft, a pressing sleeve is arranged at the lower end of the connecting piece, and the driving sleeve is coaxial with the driving shaft.

4. The single-side connection friction riveting welding gun according to claim 1 is characterized in that: The nail feeding mechanism comprises: a nail feeding tube, a flow channel, a clamping claw cylinder and a clamping claw pair, wherein: the rivet slides between the clamping claw pair through the nail feeding tube and the flow channel, and the clamping claw cylinder is connected to the clamping claw pair and drives it to open and close.

5. The single-side connection friction riveting welding gun according to claim 4 is characterized in that: The pair of clamping jaws are two clamping jaws with symmetrical structures.

6. The single-side connection friction riveting welding gun according to claim 4 is characterized in that: Each clamping jaw is provided with a first semicircular groove, and the first groove is communicated with the flow channel.

7. The single-side connection friction riveting welding gun according to claim 6 is characterized in that: A positioning surface is provided at the end of each clamping jaw.

8. The single-side connection friction riveting welding gun according to claim 6 is characterized in that: A second groove is arranged above the first groove of each clamping jaw.

9. A system based on the single-side connection friction riveting welding gun according to any one of claims 1 to 8, characterized in that: include: A mechanical arm connected to a single-sided friction riveting welding gun, and a power supply, a controller and an operating end connected in sequence, wherein: a torque sensor connected to the controller is provided between the spline shaft and the drive shaft of the single-sided friction riveting welding gun; a pressure sensor connected to the controller is provided between the electric cylinder and the transmission mechanism of the single-sided friction riveting welding gun.

Images