Automatic workpiece tightening device

Abstract

The utility model relates to an automatic workpiece tightening device. The caliper assembling device is suitable for the technical field of caliper assembling. The technical problem to be solved by the utility model is to provide the automatic tightening device for the workpiece. According to the technical scheme, the automatic workpiece tightening device is characterized by comprising a production line used for transporting workpieces; the driving mechanism is arranged on a workpiece tightening station of the production line; the tightening gun is arranged on the driving mechanism, a tightening sleeve is arranged at the end of the tightening gun, and the tightening gun can be driven by the driving mechanism to move and tighten the workpiece; the driving mechanism and the tightening gun are both in circuit connection with the controller, and the controller can control the driving mechanism to drive the tightening gun to move and control the tightening gun to tighten a workpiece and collect workpiece tightening process data at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of caliper assembly, in particular to an automatic workpiece tightening device. Background Art

[0002] The automobile steering knuckle assembly consists of a caliper, a brake disc, a steering knuckle, a dust cover and a wheel hub bearing. Each component is fastened and connected by bolts and then assembled together.

[0003] At present, the tightening method used for caliper bolts is that the automatic tightening gun is fixed on a manual auxiliary manipulator, and the manipulator is manually operated to tighten the caliper bolts to achieve assembly. However, this has high requirements on personnel and requires manual operation to adjust the hole position of the caliper bolt with good accuracy, which affects work efficiency. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to provide an automatic workpiece tightening device in view of the above-mentioned existing problems.

[0005] The technical solution adopted by the utility model is: an automatic workpiece tightening device, characterized in that it includes:

[0006] Production line, used to transport workpieces;

[0007] A driving mechanism is provided on the workpiece tightening station of the production line;

[0008] A tightening gun, which is arranged on the driving mechanism and has a tightening sleeve at its end, and can move under the driving mechanism to tighten the workpiece;

[0009] The controller, the driving mechanism and the tightening gun are both connected to the controller circuit, the controller can control the driving mechanism to drive the tightening gun to move and control the tightening gun to tighten the workpiece, and at the same time collect the process data of the tightening of the workpiece.

[0010] Through the above-mentioned technical means, the production line is used to transport the workpiece according to the process. When the workpiece passes through the workpiece tightening station, the controller controls the driving mechanism to drive the tightening gun to move, and controls the tightening gun to tighten the workpiece. With the help of automated equipment, no human control is required during the workpiece assembly process, and automated installation greatly improves the efficiency of assembly and can ensure high accuracy.

[0011] In some embodiments, a floating component is installed on the tightening gun, and the floating component is connected to the gun head of the tightening gun and its gun body. The floating component can make the gun head float during the tightening process of the tightening gun to adapt to a part of the offset hole.

[0012] Through the above technical means, a split structure is adopted between the tightening gun and the driving mechanism, and a floating component is installed on the tightening gun to increase the self-floating effect of the tightening gun, thereby avoiding the stress problem of the tightening gun caused by the offset hole during the tightening process.

[0013] In some embodiments, the floating assembly has a gun head mounting seat, a floating plate, a thrust ball bearing and a floating pin. The gun head mounting seat is connected to the gun body, and the floating plate is connected to the gun head. A plurality of thrust ball bearings are installed between the mounting seat and the floating plate. The floating pin passes through the floating plate, the thrust ball bearing and the gun head mounting seat in sequence to connect the gun head to the gun body, so that when the gun head encounters a biased hole, the gun head can float in a biased direction under the action of the floating pin.

[0014] Through the above-mentioned technical means, the floating pin is utilized to enable floating adjustment between the gun head and the gun body, and the thrust ball bearing between the floating plate and the gun head mounting seat can withstand the axial force to a certain extent. Therefore, when the gun head of the tightening gun encounters a biased hole, the gun head can conform to the biased hole under the floating effect of the floating pin, and the biased force is adjusted between the floating plate and the gun head mounting seat, thereby avoiding the force problem of the gun head encountering the biased hole.

[0015] In some embodiments, a bolt straightening assembly is provided on the gun head of the tightening gun, and the bolt straightening assembly has a straightening clamping claw and a clamping claw mounting seat. A straightening clamping claw is installed on the gun head via the clamping claw mounting seat, so that the straightening clamping claw can hold and straighten the bolt taken by the gun head.

[0016] Through the above technical means, after the tightening gun takes the bolt, the bolt is clamped and straightened under the action of the straightening clamping claws, thereby avoiding the problem of skewing when tightening the long bolt.

[0017] In some embodiments, the controller is communicatively connected to the workshop MES tightening system, and the workshop MES tightening system is preset with the tightening torque and tightening angle information of the workpiece transported in the production line. The workshop MES tightening system transmits the tightening torque and tightening angle information of the corresponding workpiece to the controller, and the controller controls the tightening gun to tighten the corresponding workpiece based on the preset information, and the controller obtains the actual tightening data of the tightening gun, and then transmits the actual tightening data to the workshop MES tightening system for storage.

[0018] In some embodiments, the driving mechanism is a three-axis moving mechanism having a mounting base, which is arranged on the workpiece tightening station, and an X-axis module arranged along the X-axis direction is provided on the mounting base, a Y-axis module arranged along the Y-axis direction is provided on the X-axis module, a Z-axis module arranged along the Z-axis direction is provided on the Y-axis module, and an X-axis motor for driving the Y-axis module to move along the X-axis direction is also provided on the X-axis module, a Y-axis motor for driving the Z-axis module to move along the Y-axis direction is provided on the Y-axis module, and a Z-axis motor for driving the tightening gun to move along the Z direction is provided on the Z-axis module.

[0019] Through the above technical means, the X-axis module, Y-axis module, Z-axis module, X-axis motor, Y-axis motor and Z-axis motor are used to cooperate to realize the control of the three-axis movement of the tightening gun.

[0020] In some embodiments, two X-direction modules are arranged in parallel on the mounting base along the X-axis direction, and two ends of the Y-direction module are respectively arranged on the two X-direction modules.

[0021] Through the above technical means, two X-axis modules are used as a base to ensure the stable movement of the Y-axis module along the X-axis direction.

[0022] In some embodiments, the tightening gun and the tightening sleeve are connected by a quick-connect connector.

[0023] The beneficial effects of the utility model are:

[0024] 1. The controller controls the driving mechanism to drive the tightening gun to move and automatically tighten the caliper bolts, which can adapt to the assembly process of the workpiece production line and realize the automatic tightening of the caliper bolts.

[0025] 2. By automating the tightening of the caliper bolts, the personnel input in the workpiece tightening station is saved, the labor intensity of employees is greatly reduced, and the problem of low efficiency of the original staff in operating the robot is avoided.

[0026] 3. Based on the preset tightening data in the workshop MES tightening system, the workpiece is tightened by controlling the tightening gun, and the actual tightening data of the workpiece is collected and stored in the workshop MES tightening system. This not only ensures the accuracy of tightening, but also facilitates the thermal analysis of the workpiece tightening process based on the actual tightening data in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a schematic structural diagram of an automatic workpiece tightening device according to an embodiment.

[0028] Figure 2 yes Figure 1 Schematic diagram of the tightening gun.

[0029] Figure 3 yes Figure 1 Schematic diagram of the single module structure.

[0030] Figure 4 It is a schematic diagram of the structure of a tightening gun equipped with a floating assembly.

[0031] Figure 5 yes Figure 4 A local enlarged schematic diagram of the .

[0032] Figure 6 It is a structural schematic diagram of a tightening gun equipped with a straightening assembly.

[0033] Description of reference numerals:

[0034] 1. Mounting base; 2. X-axis module; 3. Y-axis module; 4. Z-axis module; 5. Tightening gun; 6. X-axis drag chain; 7. Y-axis drag chain; 8. Z-axis drag chain; 9. X-axis motor; 10. Y-axis motor; 11. Z-axis motor; 12. Tightening sleeve; 13. Module base; 14. Clamping slider; 15. Screw; 16. Floating pin; 17. Thrust ball bearing; 18. Floating plate; 19. Gun head mounting seat; 20. Straightening clamping claw; 21. Clamping claw mounting seat. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model is further described below in conjunction with specific embodiments.

[0036] Combination Figures 1 to 6 As shown, this embodiment is an automatic workpiece tightening device, including a production line for transporting the workpiece to each station, a driving mechanism, a tightening gun 5 and a controller, the driving mechanism is arranged at the workpiece tightening station of the production line, the tightening gun 5 is arranged on the driving mechanism, and a tightening sleeve 12 for tightening the workpiece is arranged at the end of the tightening gun 5. The controller connects the driving mechanism and the tightening gun 5 through a circuit, so that the driving mechanism is controlled by the controller to drive the tightening gun 5 to move, and the tightening gun 5 is controlled by the controller to automatically tighten the workpiece, and at the same time collects the tightening data of the workpiece during the tightening process.

[0037] Furthermore, the driving mechanism is a three-axis moving mechanism, having a mounting base 1, the mounting base 1 is arranged on the workpiece tightening station, the top of the mounting base 1 is U-shaped, the U-shaped notch facing outward is the X-axis direction, the side corresponding to the U-shaped notch is the Y-axis direction, and the side perpendicular to the X-axis direction and the Y-axis direction is the Z-axis direction. Horizontal X-axis modules 2 are arranged in parallel on both sides of the U-shaped top of the mounting base 1. At this time, the X-axis modules 2 are arranged along the X-axis direction, and a Y-axis module 3 arranged along the Y-axis direction is arranged above the two X-axis modules 2. The two ends of the Y-axis module 3 are respectively connected to the two X-axis modules 2, and a Z-axis module 4 is arranged on the side wall of the Y-axis module 3 facing the U-shaped notch, and the Z-axis module 4 is arranged along the Z-axis direction;

[0038] A screw rod 15 connecting the two X-axis modules 2 is provided on the corresponding sides of the U-shaped notch, an X-axis motor 9 is provided at one end of the screw rod 15, an X-axis drag chain 6 is provided on the same side of the X-axis module 2 provided with the X-axis motor 9, the X-axis motor 9 is used to control the Y-axis module 3 to move along the X-axis direction, a Y-axis drag chain 7 is provided above the Y-axis module 3, a Y-axis motor 10 is provided at one end of the Y-axis module 3, the Y-axis motor 10 is used to control the Z-axis module 4 to move along the Y-axis direction, a Z-axis drag chain 8 is provided on one side of the Z-axis module 4, a tightening gun 5 is provided on the side wall of the Z-axis module 4 facing the U-shaped notch, a Z-axis motor 11 is provided at one end of the Z-axis module 4, and the Z-axis motor 11 is used to control the tightening gun 5 to move along the Z-axis direction.

[0039] Furthermore, the X-axis module 2, the Y-axis module 3 and the Z-axis module 4 are all single-module structures, and the single-module structure includes a module base 13, a clamping slider 14 and a screw rod 15. The screw rod 15 is arranged in the module base 13, and the clamping slider 14 is moved along the arrangement direction of the module base 13 in the module base 13 through the screw rod 15. The module base 13 is provided with a slide groove for the clamping slider 14 to be inserted, so that different modules are connected by using the clamping slider 14 and the module can be kept movable within a certain range.

[0040] Furthermore, in the present embodiment, the workpiece to be tightened is a caliper bolt. When the production line transports the automobile steering knuckle assembly to the workpiece tightening station, since the fixing positions of the caliper bolts of different models are different, the spatial positions of the caliper bolts of different models are pre-stored in the controller, thereby ensuring that during the transportation of the automobile steering knuckle assembly in the same batch on the production line, the controller can control the driving mechanism to drive the tightening gun 5 to move to the corresponding preset spatial position, and the controller can control the tightening gun 5 to tighten the caliper bolt after the tightening gun 5 reaches the preset spatial position.

[0041] Furthermore, the controller is communicatively connected to the workshop MES tightening system, which has preset tightening torque information and tightening angle information of the caliper bolts in the production line. The workshop MES tightening system transmits the tightening torque information and tightening angle information corresponding to the caliper bolts in the real-time batch of the production line to the controller, and the controller controls the tightening gun 5 to tighten the caliper bolts based on the tightening torque information and tightening angle information.

[0042] The controller also includes a sensor for collecting tightening data, which is convenient for collecting relevant data such as rotation angle, rotation speed and torque during the tightening process, and transmitting this part of the tightening data to the workshop MES tightening system. On the one hand, the workshop EMS tightening system compares the real-time tightening data collected with the preset tightening data of the target caliper bolt to determine whether the current torque and other parameters are qualified. On the other hand, the real-time tightening data is stored, and the tightening workpiece is subsequently subjected to thermal analysis based on the tightening data. By analyzing the tightening data, the quality of the produced caliper bolts is ensured to be stable, avoiding the problem of damage to the workpiece due to excessive heat generation.

[0043] Furthermore, a floating assembly is installed on the tightening gun 5, and the floating assembly has a gun head mounting seat 19, a floating plate 18, a thrust ball bearing 17 and a floating pin 16, and the gun head part of the tightening gun 5 is connected to the gun body part thereof by using the floating assembly. Specifically, the end of the gun body of the tightening gun 5 is installed with a gun head mounting seat 19, one end of the gun head of the tightening gun 5 is installed with a tightening sleeve 12 via a quick connector, and the other end of the gun head of the tightening gun 5 is installed with a floating plate 18, and a plurality of thrust ball bearings 17 are installed circumferentially between the gun head mounting seat 19 and the floating plate 18, and the floating pin 16 is sequentially passed through the floating plate 18, the thrust ball bearing 17, and the gun head mounting seat 19 to connect the gun head of the tightening gun 5 with the gun body of the tightening gun 5.

[0044] The function of the thrust ball bearing 17 is that its ball and the bearing can roll relative to each other, and the thrust ball bearing 17 can bear axial load to a certain extent. When the gun head of the tightening gun 5 encounters a deviated hole, the gun head can follow the direction of the deviated hole under the floating adjustment of the floating pin 16, and at this time, the deviated side thrust ball bearing 17 can have a certain ability to bear the axial load on the deviated side, so that the floating pin 16 and the thrust ball bearing 17 cooperate with each other to avoid the deviated hole causing the tightening gun 5 to be stressed during the tightening process.

[0045] Furthermore, a bolt straightening assembly is also installed on the gun head of the tightening gun 5, and the bolt straightening assembly has a straightening clamping claw 20 and a clamping claw mounting seat 21. The end of the gun head on which the tightening sleeve 12 is installed is installed with a clamping claw mounting seat 21, and the straightening clamping claw 20 is installed on the clamping claw mounting seat 21. The tightening sleeve 12 on the gun head can take the bolt, and the straightening clamping claws 20 on both sides of the tightening sleeve 12 are used by the spring in the clamping claw mounting seat 21 to hold and straighten the bolt, thereby avoiding the problem of skewing when the long bolt is tightened.

[0046] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A workpiece automatic tightening device, characterized in that: include: Production line, used to transport workpieces; A driving mechanism is provided on the workpiece tightening station of the production line; A tightening gun (5) is arranged on the driving mechanism, and a tightening sleeve (12) is arranged at the end thereof, and can move under the driving of the driving mechanism and tighten the workpiece; The controller, the driving mechanism and the tightening gun (5) are both connected to the controller circuit, and the controller can control the driving mechanism to drive the tightening gun (5) to move and control the tightening gun (5) to tighten the workpiece, while collecting process data of the tightening of the workpiece.

2. The automatic workpiece tightening device according to claim 1, characterized in that: The tightening gun (5) is provided with a floating assembly, which is respectively connected to the gun head of the tightening gun (5) and its gun body. The floating assembly can make the gun head float during the tightening process of the tightening gun (5) so as to adapt to a part of the offset hole.

3. The automatic workpiece tightening device according to claim 2, characterized in that: The floating assembly comprises a gun head mounting seat (19), a floating plate (18), a thrust ball bearing (17) and a floating pin (16); the gun head mounting seat (19) is connected to the gun body; the floating plate (18) is connected to the gun head; a plurality of thrust ball bearings (17) are installed between the mounting seat and the floating plate (18); the floating pin (16) passes through the floating plate (18), the thrust ball bearing (17) and the gun head mounting seat (19) in sequence to connect the gun head with the gun body, so that when the gun head encounters a deflected hole, the gun head can deflect and float under the action of the floating pin (16).

4. The automatic workpiece tightening device according to claim 1, characterized in that: The gun head of the tightening gun (5) is provided with a bolt straightening assembly, which comprises a straightening clamping claw (20) and a clamping claw mounting seat (21). The end of the gun head is provided with the tightening sleeve (12), and the straightening clamping claw (20) is mounted on the gun head via the clamping claw mounting seat (21), so that the bolt taken by the tightening sleeve (12) can be clamped and straightened by the straightening clamping claw (20).

5. The automatic workpiece tightening device according to claim 1, characterized in that: The controller is communicatively connected to a workshop MES tightening system, and the workshop MES tightening system is preset with tightening torque and tightening angle information of the workpiece transported in the production line. The workshop MES tightening system transmits the tightening torque and tightening angle information of the corresponding workpiece to the controller. The controller controls the tightening gun (5) to tighten the corresponding workpiece based on the preset information, and the controller obtains actual tightening data of the tightening gun (5), and then transmits the actual tightening data to the workshop MES tightening system for storage.

6. The automatic workpiece tightening device according to claim 1, characterized in that: The driving mechanism is a three-axis moving mechanism, comprising a mounting base (1), the mounting base (1) being arranged on the workpiece tightening station, the mounting base (1) being provided with an X-axis module (2) arranged along the X-axis direction, the X-axis module (2) being provided with a Y-axis module (3) arranged along the Y-axis direction, the Y-axis module (3) being provided with a Z-axis module (4) arranged along the Z-axis direction, the X-axis module (2) being further provided with an X-axis motor (9) for driving the Y-axis module (3) to move along the X-axis direction, the Y-axis module (3) being provided with a Y-axis motor (10) for driving the Z-axis module (4) to move along the Y-axis direction, and the Z-axis module (4) being provided with a Z-axis motor (11) for driving the tightening gun (5) to move along the Z-axis direction.

7. The automatic workpiece tightening device according to claim 6, characterized in that: Two X-direction modules (2) are arranged in parallel on the mounting base (1) along the X-axis direction, and two ends of the Y-direction module (3) are respectively arranged on the two X-direction modules (2).

8. The automatic workpiece tightening device according to claim 1, characterized in that: The tightening gun (5) and the tightening sleeve (12) are connected by a quick connection joint.

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