Nut automatic welding auxiliary device

Abstract

The utility model discloses an automatic auxiliary welding device for nuts, which relates to the technical field of welding tools and comprises a frame, a workpiece positioning device and a nut carrying device, the workpiece positioning device comprises a first lifting mechanism arranged on the frame and a first rotating mechanism arranged on the first lifting mechanism, and the nut carrying device comprises a second lifting mechanism arranged on the frame and a second rotating mechanism arranged on the second lifting mechanism. The positioning disc is arranged on the first rotating mechanism; the positioning disc is used for bearing and positioning a workpiece, the first rotating mechanism is used for driving the positioning disc to rotate so that a via hole in the workpiece can correspond to an electrode pin of the resistance spot welder, and the first lifting mechanism is used for driving the positioning disc to descend so that the electrode pin can be sleeved with the workpiece through the via hole. And the nut carrying device is used for carrying the nut and sleeving the carried nut on the electrode pin penetrating through the via hole. According to the automatic positioning device, automatic and accurate positioning of the nut and the workpiece is achieved, the welding quality problems such as point deviation, skewing and ablation of the nut in the welding process are completely eradicated, labor intensity is lowered, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding tooling, and particularly relates to an automatic welding auxiliary device for nuts. Background Technique

[0002] In order to facilitate the installation of some plate-like workpieces of a combine harvester, nuts are generally welded to the workpieces by a resistance spot welder. The welded nuts solve the problem that nuts cannot be fixed on the workpieces, and have good strength and are convenient for installing bolts, so the usage amount is increasing.

[0003] At present, for the welding of workpieces and nuts, generally, the workpieces are positioned by a tooling, and then workers use a fixture to hold the nuts and place the nuts at the welding positions of the workpieces, and then the resistance spot welder welds the two.

[0004] Although the above welding method can realize the welding of workpieces and nuts, manually holding the fixture to position the nuts on the workpieces not only has inaccurate positioning, but also easily causes welding quality problems such as nut point deviation, skew, and ablation during the welding process, and has a large labor intensity and extremely low work efficiency. Content of the Utility Model

[0005] Aiming at the above-mentioned defects existing in the prior art, the utility model aims to provide an automatic welding auxiliary device for nuts, which realizes the automatic and accurate positioning of nuts and workpieces, eliminates welding quality problems such as nut point deviation, skew, and ablation during the welding process, reduces the labor intensity, and improves the work efficiency.

[0006] In order to solve the above technical problems, the technical scheme adopted by the utility model is:

[0007] An automatic welding auxiliary device for nuts, comprising a frame, a workpiece positioning device and a nut handling device. The workpiece positioning device includes a first lifting mechanism arranged on the frame, a first rotating mechanism arranged on the first lifting mechanism, and a positioning disk arranged on the first rotating mechanism. The positioning disk is used for carrying and positioning the workpiece. The first rotating mechanism is used for driving the positioning disk to rotate so that the through hole on the workpiece corresponds to the electrode pin of the resistance spot welder. The first lifting mechanism is used for driving the positioning disk to descend so that the workpiece is sleeved on the electrode pin through the through hole. The nut handling device is used for handling nuts and sleeving the transported nuts on the electrode pin passing through the through hole to position the nuts on the workpiece.

[0008] Among them, a horizontal reciprocating linear motion mechanism is provided on the first lifting mechanism, the first rotating mechanism is arranged on the horizontal reciprocating linear motion mechanism, and the horizontal reciprocating linear motion mechanism is used to drive the positioning plate to perform horizontal reciprocating linear motion to adjust the position of the workpiece.

[0009] Among them, the first lifting mechanism includes two first vertical telescopic cylinders arranged at intervals on the frame, the horizontal reciprocating linear motion mechanism is a lead screw slide table, and the lead screw slide table is arranged on the piston rods of the two first vertical telescopic cylinders.

[0010] Among them, the first rotating mechanism is a first hollow rotating platform, and the first hollow rotating platform is arranged on the slider of the lead screw slide table.

[0011] Among them, the nut handling device includes a second lifting mechanism arranged on the frame, a second rotating mechanism arranged on the second lifting mechanism, a support arm arranged on the second rotating mechanism, and a clamping mechanism arranged on the support arm. The clamping mechanism is used to pick and place nuts, the second lifting mechanism is used to drive the clamping mechanism to rise or fall, and the second rotating mechanism is used to drive the clamping mechanism to rotate.

[0012] Among them, the second lifting mechanism is a second vertical telescopic cylinder, the second rotating mechanism is a second hollow rotating platform, an installation plate is arranged on the second vertical telescopic cylinder, the second hollow rotating platform is arranged at one end of the installation plate, a counterweight is arranged at the other end of the installation plate, and the second vertical telescopic cylinder is located between the second hollow rotating platform and the counterweight.

[0013] Among them, the clamping mechanism is rotatably arranged on the support arm, and an angle adjustment mechanism for driving the clamping mechanism to rotate is arranged on the support arm.

[0014] Among them, the angle adjustment mechanism includes a rotation driving member arranged on the support arm and a belt transmission mechanism arranged between the rotation driving member and the clamping mechanism.

[0015] Among them, the rotation driving member is a motor, the clamping mechanism is a pneumatic gripper, and the belt transmission mechanism includes a driving synchronous pulley arranged on the motor, a driven synchronous pulley arranged on the pneumatic gripper, and a synchronous belt wound around the driving synchronous pulley and the driven synchronous pulley.

[0016] Among them, a nut positioning platform is arranged on the frame.

[0017] Adopting the above technical solutions, the beneficial effects of the utility model are:

[0018] The automatic nut welding auxiliary device provided by the utility model uses a positioning disk to carry and position the workpiece. The first rotating mechanism drives the positioning disk to rotate so that the through hole on the workpiece corresponds to the electrode pin of the resistance spot welder. The first lifting mechanism drives the positioning disk to descend so that the workpiece is sleeved on the electrode pin through the through hole. Then, the nut handling device transports the nut and sleevs the transported nut on the electrode pin passing through the workpiece, thus realizing the automatic and accurate positioning of the nut and the workpiece. Compared with the prior art, the automatic nut welding auxiliary device of the utility model realizes the automatic and accurate positioning of the workpiece and the nut, not only with accurate positioning, eliminating welding quality problems such as nut point deviation, skew, ablation, etc. during the welding process, but also reducing the labor intensity and greatly improving the work efficiency, having good economic benefits. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural view of the automatic nut welding auxiliary device of the utility model;

[0020] In the figure: 1, frame; 2, first lifting mechanism; 3, first rotating mechanism; 4, positioning disk; 5, workpiece; 51, through hole; 6, horizontal reciprocating linear motion mechanism; 7, second lifting mechanism; 8, second rotating mechanism; 9, support arm; 10, clamping mechanism; 11, mounting plate; 12, counterweight; 13, rotation driving part; 14, belt transmission mechanism; 15, nut positioning platform. Detailed Embodiment

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the following further details the utility model in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0022] As Figure 1 shown, this embodiment provides an automatic nut welding auxiliary device, including a frame 1, a workpiece positioning device and a nut handling device. The workpiece positioning device includes a first lifting mechanism 2 arranged on the frame 1, a first rotating mechanism 3 arranged on the first lifting mechanism 2, and a positioning disk 4 arranged on the first rotating mechanism 3. The positioning disk 4 is used to carry and position the workpiece 5. The first rotating mechanism 3 is used to drive the positioning disk 4 to rotate so that the through hole 51 on the workpiece 5 corresponds to the electrode pin (not shown in the figure) of the resistance spot welder. The first lifting mechanism 2 is used to drive the positioning disk 4 to descend so that the workpiece 5 is sleeved on the electrode pin through the through hole 51. The nut handling device is used to transport the nut (not shown in the figure) and sleev the transported nut on the electrode pin passing through the through hole 51 to position the nut on the workpiece 5.

[0023] The nut automatic welding auxiliary device in this embodiment realizes the automatic and precise positioning of the nut and the workpiece 5, eliminates welding quality problems such as nut point deviation, skew, and ablation during the welding process, reduces labor intensity, greatly improves work efficiency, and has good economic benefits.

[0024] Since the workpiece 5 in this embodiment is provided with positioning holes, therefore, in this embodiment, positioning columns 41 adapted to the positioning holes of the workpiece 5 are provided on the positioning disk 4. In practical applications, the specific structure of the positioning disk 4 can be set according to the structure of the workpiece 5, and this embodiment does not limit this.

[0025] A horizontal reciprocating linear motion mechanism 6 is provided on the first lifting mechanism 2 in this embodiment, and the first rotating mechanism 3 is arranged on the horizontal reciprocating linear motion mechanism 6. The horizontal reciprocating linear motion mechanism 6 is used to drive the positioning disk 4 to perform horizontal reciprocating linear motion to adjust the position of the workpiece 5. With such a setting, the position adjustment requirement of the workpiece 5 is satisfied.

[0026] Since the telescopic cylinder has the advantages of simple and compact structure, good stability, and low cost, therefore, in this embodiment, it is preferred that the first lifting mechanism 2 includes two vertical telescopic cylinders arranged at intervals on the frame 1, and both of the two vertical telescopic cylinders are denoted as the first vertical telescopic cylinders; since the lead screw slide has the advantages of high transmission efficiency and transmission accuracy, therefore, the horizontal reciprocating linear motion mechanism 6 in this embodiment is preferably a lead screw slide, and the lead screw slide is arranged on the piston rods of the two first vertical telescopic cylinders. Of course, the first lifting mechanism 2 can also adopt a telescopic electric cylinder or a telescopic hydraulic cylinder, and the horizontal reciprocating linear motion mechanism 6 can also adopt a pneumatic slide or a slide electric cylinder, which is specifically selected according to actual needs, and this embodiment does not limit this.

[0027] Since the hollow rotary platform has the advantages of directly installing the equipment to be installed on the rotary platform, high reliability, and low cost, therefore, the first rotating mechanism 3 in this embodiment is preferably a hollow rotary platform, and is denoted as the first hollow rotary platform. The first hollow rotary platform is arranged on the slider of the lead screw slide, and the positioning disk 4 is arranged on the rotary platform of the first hollow rotary platform. Of course, the first rotating mechanism 3 can also adopt a pneumatic rotary platform or a motor, which is specifically selected according to actual needs, and this embodiment does not limit this

[0028] The nut handling device in this embodiment includes a second lifting mechanism 7 arranged on the frame 1, a second rotating mechanism 8 arranged on the second lifting mechanism 7, a support arm 9 arranged on the second rotating mechanism 8, and a clamping mechanism 10 arranged on the support arm 9. The clamping mechanism 10 is used to pick and place nuts, the second lifting mechanism 7 is used to drive the clamping mechanism 10 to rise or fall, and the second rotating mechanism 8 is used to drive the clamping mechanism 10 to rotate. With such a setting, the automatic handling function of the nut is realized.

[0029] In this embodiment, the second lifting mechanism 7 is also preferably a vertical telescopic cylinder, denoted as the second vertical telescopic cylinder; the second rotating mechanism 8 is also preferably a hollow rotating platform, denoted as the second hollow rotating platform. An installation plate 11 is provided on the second vertical telescopic cylinder, the second hollow rotating platform is arranged at one end of the installation plate 11, a counterweight 12 is arranged at the other end of the installation plate 11, and the second vertical telescopic cylinder is located between the second hollow rotating platform and the counterweight 12. By arranging the counterweight 12, the stability of the installation plate 11 during lifting is ensured, thereby improving the stability when handling nuts.

[0030] In this embodiment, the clamping mechanism 10 is rotatably arranged on the support arm 9, and an angle adjustment mechanism for driving the clamping mechanism 10 to rotate is arranged on the support arm 9. With such an arrangement, the angle adjustment of the nut is realized, meeting the feeding and positioning requirements of the nut.

[0031] The angle adjustment mechanism in this embodiment includes a rotation driving member 13 arranged on the support arm 9 and a belt transmission mechanism 14 arranged between the rotation driving member 13 and the clamping mechanism 10. By arranging the belt transmission mechanism 14, the impact and vibration loads during the operation of the equipment are reduced, making the operation of the equipment more stable. Of course, the belt transmission mechanism 14 can also be replaced by a gear transmission mechanism or a chain transmission mechanism, which is specifically selected according to actual needs, and this embodiment does not limit this.

[0032] The rotation driving member 13 in this embodiment is a motor, and the clamping mechanism 10 is a pneumatic gripper. Since the synchronous belt transmission mechanism has advantages such as accurate transmission ratio, high transmission efficiency, and smooth transmission, the belt transmission mechanism 14 in this embodiment is preferably a synchronous belt transmission mechanism, specifically including a driving synchronous belt pulley arranged on the motor, a driven synchronous belt pulley arranged on the pneumatic gripper, and a synchronous belt wound around the driving synchronous belt pulley and the driven synchronous belt pulley.

[0033] A nut positioning platform 15 for carrying nuts is arranged on the frame 1 in this embodiment.

[0034] When positioning the workpiece 5, first, the positioning disk 4 carries and positions the workpiece 5, then the horizontal reciprocating linear motion mechanism 6 drives the positioning disk 4 to perform horizontal reciprocating linear motion to adjust the position of the workpiece 5, then the first rotating mechanism 3 drives the positioning disk 4 to rotate so that the through hole 51 on the workpiece 5 corresponds to the electrode pin of the resistance spot welder, and finally the first lifting mechanism 2 drives the positioning disk 4 to descend so that the workpiece 5 is sleeved on the electrode pin from the through hole 51.

[0035] When the nut is positioned, the nut is fed by a vibrating tray (not shown in the figure), conveyed through a material channel to the nut positioning platform 15, and the material channel cooperates with the nut positioning platform 15 to realize the positioning of the nut on the nut positioning platform 15; then the second lifting mechanism 7 drives the clamping mechanism 10 to descend, and the clamping mechanism 10 clamps the positioned nut on the nut positioning platform 15; then the second lifting mechanism 7 drives the clamping mechanism 10 to rise, and the second rotating mechanism 8 drives the clamping mechanism 10 to rotate to carry the nut and sleuth the carried nut on the electrode pin passing through the through hole 51, so as to position the relative position of the nut and the workpiece 5. Finally, the resistance spot welder spot-welds the positioned workpiece 5 and the nut.

[0036] The above is only a preferred embodiment of the nut automatic welding auxiliary device of the present invention, and there are more embodiments that will not be elaborated here. In summary, the nut automatic welding auxiliary device of the present invention realizes the automatic and accurate positioning of the workpiece 5 and the nut, eliminates welding quality problems such as nut point deviation, skew, and ablation during the welding process, reduces the labor intensity, greatly improves the work efficiency, and has good economic benefits.

[0037] The present invention is not limited to the above specific implementation manners. Various transformations made by those of ordinary skill in the art starting from the above concepts without creative labor fall within the protection scope of the present invention.

Claims

1. A nut automatic welding auxiliary device, characterized in that: It includes a frame, a workpiece positioning device and a nut handling device. The workpiece positioning device comprises a first lifting mechanism arranged on the frame, a first rotating mechanism arranged on the first lifting mechanism, and a positioning plate arranged on the first rotating mechanism; The positioning plate is used to carry and position the workpiece, the first rotating mechanism is used to drive the positioning plate to rotate so that the through hole on the workpiece corresponds to the electrode pin of the resistance spot welding machine, the first lifting mechanism is used to drive the positioning plate to descend so that the workpiece is sleeved on the electrode pin through the through hole, and the nut transporting device is used to transport nuts and sleeve the transported nuts on the electrode pin passing through the through hole to locate the position of the nut on the workpiece.

2. The nut automatic welding auxiliary device according to claim 1 is characterized in that: The first lifting mechanism is provided with a horizontal reciprocating linear motion mechanism, the first rotating mechanism is provided on the horizontal reciprocating linear motion mechanism, and the horizontal reciprocating linear motion mechanism is used to drive the positioning plate to perform horizontal reciprocating linear motion to adjust the position of the workpiece.

3. The nut automatic welding auxiliary device according to claim 2 is characterized in that: The first lifting mechanism comprises two first vertical telescopic cylinders arranged at intervals on the frame, and the horizontal reciprocating linear motion mechanism is a screw slide, which is arranged on the piston rods of the two first vertical telescopic cylinders.

4. The nut automatic welding auxiliary device according to claim 3 is characterized in that: The first rotating mechanism is a first hollow rotating platform, and the first hollow rotating platform is arranged on the slider of the lead screw slide.

5. The nut automatic welding auxiliary device according to claim 1, characterized in that: The nut handling device includes a second lifting mechanism arranged on the frame, a second rotating mechanism arranged on the second lifting mechanism, a support arm arranged on the second rotating mechanism, and a clamping mechanism arranged on the support arm, the clamping mechanism is used to take and place nuts, the second lifting mechanism is used to drive the clamping mechanism to rise or fall, and the second rotating mechanism is used to drive the clamping mechanism to rotate.

6. The nut automatic welding auxiliary device according to claim 5, characterized in that: The second lifting mechanism is a second vertical telescopic cylinder, the second rotating mechanism is a second hollow rotating platform, a mounting plate is provided on the second vertical telescopic cylinder, the second hollow rotating platform is provided at one end of the mounting plate, a counterweight is provided at the other end of the mounting plate, and the second vertical telescopic cylinder is located between the second hollow rotating platform and the counterweight.

7. The nut automatic welding auxiliary device according to claim 5, characterized in that: The clamping mechanism is rotatably arranged on the support arm, and the support arm is provided with an angle adjustment mechanism for driving the clamping mechanism to rotate.

8. The nut automatic welding auxiliary device according to claim 7, characterized in that: The angle adjustment mechanism includes a rotation drive member arranged on the support arm, and a belt transmission mechanism arranged between the rotation drive member and the clamping mechanism.

9. The nut automatic welding auxiliary device according to claim 8, characterized in that: The rotating drive member is a motor, the clamping mechanism is a pneumatic clamp, and the belt transmission mechanism includes a driving synchronous pulley arranged on the motor, a driven synchronous pulley arranged on the pneumatic clamp, and a synchronous belt wound around the driving synchronous pulley and the driven synchronous pulley.

10. The nut automatic welding auxiliary device according to claim 1, characterized in that: A nut positioning platform is arranged on the frame.

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