Quick change device of automobile part welding tool

Abstract

A quick change device of an automobile part welding tool comprises a plurality of fixing seats used for being installed on the ground, two side longitudinal beams are fixedly connected to the fixing seats, a cross beam is fixedly connected between the two side longitudinal beams, a plurality of bearing seats are arranged on each side longitudinal beam in the longitudinal direction, bearings are installed on the bearing seats, the axial direction of the bearings is the horizontal direction, and the axial direction of the bearings is the horizontal direction. The bearings correspond to longitudinal bottom beams on the two sides of the welding tool and are used for supporting the welding tool, at least two guide wheel fixing seats are further arranged on each side longitudinal beam, guide wheels are installed on the guide wheel fixing seats, the axial direction of the guide wheels is the vertical direction, the guide wheels are used for guiding replacement of the welding tool, and the welding tool is arranged on the guide wheels. A positioning air cylinder is arranged on the inner side of each side longitudinal beam, a limiting support is arranged on the outer side of each side longitudinal beam, and a plurality of limiting blocks are arranged on the cross beam.

Description

Technical Field

[0001] The utility model relates to the field of welding tooling for automobile parts, and particularly relates to a quick-change device for a welding tooling of automobile parts. Background Art

[0002] When welding workpieces with complex structures, it is generally necessary to use welding tooling to position the workpieces so that the welding can proceed smoothly. In the prior art, when using a robot to weld automobile parts, a quick-change device for a welding tooling is usually arranged at a welding station. During welding, the welding tooling for the automobile parts is pushed above the quick-change device, and the welding tooling is supported by a cylinder provided in the quick-change device. Then, the parts to be welded are lifted to the corresponding positions of the automobile by the welding tooling for positioning, and then welded by the robot.

[0003] For this kind of quick-change device that uses a cylinder to support the welding tooling, with the application of body connection processes such as flow drill screw process and self-piercing riveting process on automobile bodies, when the robot welds and fixes these automobile parts, a pressure of about 1.5 KN will be exerted on the welding tooling for the automobile parts. This pressure will cause the cylinder of the quick-change device to be unable to stably support the welding tooling, resulting in the welding tooling shaking during the welding process, leading to inaccurate positioning of the automobile parts and seriously affecting the welding quality of the automobile parts. Moreover, since the welding tooling needs to be replaced according to different welded parts, the cylinder needs to be slowly lifted and retracted during each replacement process, and the time used is relatively long, thus affecting the work efficiency. Summary of the Invention

[0004] The utility model aims at the above problems and provides a quick-change device for a welding tooling of automobile parts, which can provide a large supporting force for the welding tooling of automobile parts, ensure the stability of the welding tooling of automobile parts during the robot welding process, and provide accurate welding positioning points.

[0005] The technical solution of the utility model is as follows: A quick-change device for a welding tooling of automobile parts includes a plurality of fixed seats for installation on the ground. Two side longitudinal beams are fixedly connected to the plurality of fixed seats. A cross beam is fixedly connected between the two side longitudinal beams. A plurality of bearing seats are arranged longitudinally on each side longitudinal beam, and bearings are installed on each bearing seat. The axial direction of the bearings is horizontal, and the bearings correspond to the longitudinal bottom beams on both sides of the welding tooling for supporting the welding tooling. At least two guide wheel fixing seats are further arranged on each side longitudinal beam, and guide wheels are installed on each guide wheel fixing seat. The axial direction of the guide wheels is vertical, and the guide wheels are used for guiding the replacement of the welding tooling. A positioning cylinder is arranged inside each side longitudinal beam, and a limiting bracket is arranged outside each side longitudinal beam. A plurality of limiting blocks are arranged on the cross beam.

[0006] Preferably, a guiding inclined surface is arranged at the front end of each limiting bracket.

[0007] Preferably, a plurality of tooling in-place sensors are arranged on the cross beam, and the tooling in-place sensors are located above the limit blocks.

[0008] Preferably, a mechanical locking structure is arranged between the two side longitudinal beams, and the mechanical locking structure is fixed to the ground.

[0009] Preferably, a valve island is arranged on the outer side of the side longitudinal beam, and the valve island is connected to the positioning cylinder.

[0010] Preferably, the guide wheel is located between the limit bracket and the bearing, and the guide wheel corresponds to the outer sides of the longitudinal bottom beams on both sides of the welding tooling.

[0011] The advantages of the present utility model are as follows: By adding a plurality of bearings on the side longitudinal beams and using the bearings to support the welding tooling for automotive parts, the present utility model replaces the technical solution of using a plurality of cylinders for support in the prior art, greatly improving the supporting force of the quick-change device for the welding tooling for automotive parts, ensuring that the welding tooling for automotive parts can remain stable during the welding process, providing precise positioning for the robot to weld automotive parts. At the same time, since the present utility model does not use cylinders to support the tooling, when replacing the tooling, the positioning cylinder can be quickly lifted and retracted, greatly improving the efficiency of replacing the tooling and enabling the tooling to be quickly replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural view of the present utility model;

[0013] Figure 2 is a schematic top view structural view of the present utility model;

[0014] Figure 3 is a schematic structural view of the welding tooling for automotive parts;

[0015] Figure 4 is a schematic bottom view structural view of the welding tooling for automotive parts. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] See Figures 1 to 2, A quick-change device for an automobile component welding tooling, used for quickly replacing the welding tooling 5, including four fixed seats 1 for installation on the ground. Two side longitudinal beams 11 are fixedly connected to the four fixed seats 1. A cross beam 12 is fixedly connected between the two side longitudinal beams 11. Three bearing seats 111 are arranged longitudinally on each side longitudinal beam 11. Bearings 112 are installed on each bearing seat 111. The axial direction of the bearings 112 is horizontal. The bearings 112 correspond to the longitudinal bottom beams 51 on both sides of the welding tooling, and are used to support the welding tooling. At least two guide wheel fixed seats 113 are also provided on each side longitudinal beam 11. Guide wheels 114 are installed on each guide wheel fixed seat 113. The axial direction of the guide wheels 114 is vertical. The guide wheels 114 are used to guide the replacement of the welding tooling. The guide wheels 114 are located between the limit bracket and the bearings 112, and the guide wheels 114 correspond to the outer sides of the longitudinal bottom beams 51 on both sides of the welding tooling. A positioning cylinder 2 is provided on the inner side of each side longitudinal beam 11. A limit bracket 115 is provided on the outer side of each side longitudinal beam 11. A guide slope 116 is provided at the front end of each limit bracket 115. A valve island 4 is provided on the outer side of the side longitudinal beam 11. The valve island 4 is connected to the positioning cylinder 2. Two limit blocks 121 are provided on the cross beam 12. Two tooling in-place sensors 122 are provided on the cross beam 12. The tooling in-place sensors 122 are located above the limit blocks 121. The tooling in-place sensors 122 are used to check whether there is a tooling pushed into the quick-change device. A mechanical locking structure 3 is provided between the two side longitudinal beams 11. The mechanical locking structure 3 is fixed to the ground.

[0017] See Figure 3 and Figure 4 , It is an automobile component welding tooling. A robotic arm is installed on the mounting plate of the welding tooling 5 for positioning automobile components. Four universal wheels are provided at the lower end of the mounting plate. Stop blocks 54 are provided beside the two front universal wheels. A mechanical clip 54 is provided between the two rear universal wheels. Longitudinal bottom beams 51 are provided on both sides of the lower end of the mounting plate. A plurality of positioning holes 52 are provided between the two longitudinal bottom beams 51.

[0018] The usage method of the utility model is as follows: First, push the welding tooling 5 into this quick-change device. When pushing in the welding tooling 5, the limit brackets 115 on the outer sides of the two side longitudinal beams 11 will limit the welding tooling 5. At the same time, the guiding inclined surfaces 116 provided at the front ends of the limit brackets 115 will conduct rough guiding on the welding tooling 5. When continuing to push in the welding tooling 5, the outer side surface of the longitudinal bottom beam 51 of the welding tooling 5 contacts the guiding wheels 114 on both sides of this quick-change device. The guiding wheels 114 conduct precise guiding on the tooling through rolling, and reduce friction, making it easier to push in the welding tooling 5. At the same time, the guiding wheels 114 will limit the welding tooling 5. The bottom of the longitudinal bottom beam 51 contacts the bearing 112, and the bearing 112 rolls to reduce the friction when the welding tooling 5 is pushed in, and ensure the support of the bearing 112 for the welding tooling 5. Through experimental verification, each bearing 112 of this quick-change device can provide a support force of about 20 KN. Continuing to push in the welding tooling 5 until the stop block 54 on the lower side of the mounting plate of the welding tooling 5 impacts the limit block 121 provided on the cross beam 12 of this quick-change device means that the tooling is in place. After the tooling is in place, the operator operates the control valve island 4 to drive the piston rod of the positioning cylinder 2 to rise and insert into the positioning hole 52 on the lower side of the mounting plate of the welding tooling 5 to conduct positioning and locking on the welding tooling 5. In addition, when the tooling is in place, the mechanical clip 54 on the lower side of the mounting plate of the welding tooling 5 is combined with the mechanical locking structure 3 of this quick-change device for mechanical locking, avoiding the problem that the tooling is manually pulled when the piston rod of the positioning cylinder 2 is inserted into the positioning hole, resulting in damage to the piston rod of the positioning cylinder 2. When replacing the tooling, only need to first control the valve island 4 to drive the piston rod of the positioning cylinder 2 to retract, then unlock the mechanical lock, pull the welding tooling 5 backward, and then push the new tooling into this quick-change device.

Claims

1. A quick-change device for a welding tooling of an automotive component, comprising a plurality of fixed seats (1) for mounting on the ground, two side longitudinal beams (11) are fixedly connected to the plurality of fixed seats (1), and a cross beam (12) is fixedly connected between the two side longitudinal beams (11), characterized in that: A plurality of bearing seats (111) are arranged longitudinally on each side longitudinal beam (11), bearings (112) are installed on each bearing seat (111), the axial direction of the bearings (112) is the horizontal direction, the bearings (112) correspond to the longitudinal bottom beams (51) on both sides of the welding fixture, and are used to support the welding fixture. At least two guide wheel fixing seats (113) are further arranged on each side longitudinal beam (11), guide wheels (114) are installed on each guide wheel fixing seat (113), the axial direction of the guide wheels (114) is the vertical direction, the guide wheels (114) are used to guide the replacement of the welding fixture, a positioning cylinder (2) is arranged inside each side longitudinal beam (11), a limiting bracket (115) is arranged outside each side longitudinal beam (11), and a plurality of limiting blocks (121) are arranged on the cross beam (12).

2. The quick-change device of an automobile part welding tooling according to claim 1, characterized in that: Guide inclined surfaces (116) are arranged at the front ends of the respective limiting brackets (115).

3. The quick-change device of an automobile component welding tooling according to claim 1, characterized in that: A plurality of fixture in-place sensors (122) are arranged on the cross beam (12), and the fixture in-place sensors (122) are located above the limiting blocks (121).

4. The quick-change device of an automobile component welding tooling according to claim 1, wherein: A mechanical locking structure (3) is arranged between the two side longitudinal beams (11), and the mechanical locking structure (3) is fixed to the ground.

5. The quick-change device of an automobile part welding tooling according to claim 1, characterized in that: A valve island (4) is arranged outside the side longitudinal beam (11), and the valve island (4) is connected to the positioning cylinder (2).

6. The quick-change device of a welding tool for automotive components according to claim 1, characterized in that: The guide wheels (114) are located between the limiting brackets and the bearings (112), and the guide wheels (114) correspond to the outer sides of the longitudinal bottom beams (51) on both sides of the welding fixture.

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