Plate welding work station capable of rapidly completing multi-point welding

Abstract

The utility model discloses a plate welding work station capable of rapidly completing multi-point welding. The plate welding work station comprises a feeding and discharging area, a transferring area and a welding area which are sequentially arranged in the first horizontal direction. A first mechanical arm, a second mechanical arm and an NG table are sequentially arranged in the transfer area in the second horizontal direction. A front sliding rail, a movable clamp, a rear sliding rail and a plurality of welding assemblies are arranged in the welding area, the upper portion of the front sliding rail is divided into a feeding station and a welding station, the first mechanical arm is located on one side of the feeding station, the second mechanical arm is located on one side of the welding station, and the welding assemblies are located on the other side of the welding station. According to the workstation, welding is divided into two steps, after welding in the first step is completed, a plate can be moved away from the movable clamp, when welding in the second step is conducted on the second manipulator, the movable clamp can return to the feeding station to bear the next plate, the welding time is further saved, and the welding efficiency is improved. And the plate welded in the second step is directly conveyed by the second manipulator for blanking, so that the production rhythm is fast.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a plate welding workstation that can quickly complete multi-point welding. Background Technology

[0002] Automobiles contain many multi-layered sheet metal parts, which require pre-welding of these parts. The principle of spot welding is to utilize the high resistance of the contact surface between two sheets, causing current to generate a large amount of heat in this area. This melts the contact surface of the two sheets, forming a weld nugget, which then firmly connects the two sheets together. While the number and location of weld points may vary depending on the vehicle body design, the welding principle remains the same.

[0003] For welding vehicle body panels, there are many automated welding machines on the market. Some of these machines fix the panels to a fixture and then weld them using a movable welding torch. Others grip the panels on a robotic arm and move the panels to allow the stationary welding torch to weld them. Each has its advantages and disadvantages. The former offers stable positioning and allows multiple welding torches to weld simultaneously, saving welding time, but requires alignment and clamping before removal from the fixture. The latter allows for immediate movement after welding, saving relocation time.

[0004] Therefore, it is necessary to design a high-speed welding workstation that combines the advantages of both to improve work efficiency. Utility Model Content

[0005] The main purpose of this utility model is to provide a plate welding workstation that can quickly complete multi-point welding, which can quickly weld plates together with high efficiency and fast work pace.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: a plate welding workstation for rapidly completing multi-point welding, comprising a loading / unloading area, a transfer area, and a welding area arranged sequentially along a first horizontal direction; a first robot arm, a second robot arm, and an NG table are arranged sequentially along a second horizontal direction in the transfer area; the loading / unloading area has a loading position near the first robot arm and a unloading position near the second robot arm; the welding area has a front slide rail extending along the first horizontal direction, a movable clamp moving along the front slide rail, a rear slide rail parallel to the front slide rail, and multiple welding components moving independently on the rear slide rail; the area above the front slide rail is divided into a feeding station and a welding station, the first robot arm is located on one side of the feeding station, the second robot arm is located on one side of the welding station, and the welding components are located on the other side of the welding station.

[0007] Specifically, a gravity centering platform is provided between the first robotic arm and the second robotic arm. The gravity centering platform has a herringbone three-dimensional structure, including a pair of inclined slopes that are symmetrical along the vertical plane. Both inclined slopes are rectangular, and each inclined slope has baffles at its lower edge and outer edge.

[0008] Specifically, the loading position and the unloading position are a pair.

[0009] Furthermore, a positioning camera is installed above each loading station.

[0010] Specifically, the welding assembly includes a welding torch, a telescopic module for driving the welding torch to extend and retract horizontally, a lifting module for driving the telescopic module to rise and fall, and a traveling mechanism for driving the lifting module to move horizontally on the rear slide rail.

[0011] The beneficial effects of this utility model's technical solution are:

[0012] This workstation divides welding into two steps: welding on a moving fixture and welding on a second robotic arm. The first welding step is completed simultaneously by multiple welding components, resulting in high work efficiency. After the first welding step is completed, the workpiece can be removed from the moving fixture. When the second welding step is performed on the second robotic arm, the moving fixture can return to the feeding station to receive the next workpiece, further saving welding time. The workpieces that have completed the second welding step are directly sent to the sorting station by the second robotic arm, resulting in a fast movement rhythm. Attached Figure Description

[0013] Figure 1 This is a layout diagram of the plate welding workstation for an example embodiment;

[0014] Figure 2 This is a perspective view of the core components of the plate welding workstation before welding begins, as shown in the example.

[0015] Figure 3 A 3D view of the core components in the welding zone during welding;

[0016] Figure 4 for Figure 3 A magnified view of a portion of position A in the middle.

[0017] The numbers in the diagram represent:

[0018] 1-Panel welding workstation

[0019] 11-Loading / Unloading area, 111-Loading position, 112-Unloading position, 113-Positioning camera.

[0020] 12-Transfer area, 121-First robotic arm, 122-Gravity-based central platform, 123-Second robotic arm, 1231-Gripper, 124-NG platform

[0021] 13-Welding area, 131-Front slide rail, 132-Mobile fixture, 133-Rear slide rail, 134-Welding assembly, 1341-Welding torch, 1342-Telescopic module, 1343-Lifting module, 1344-Traveling mechanism;

[0022] 2-Plate, 21-Solder joint. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to specific embodiments.

[0024] Example:

[0025] like Figure 1 and Figure 2 As shown, the present invention provides a plate welding workstation 1 for rapidly completing multi-point welding, comprising a loading / unloading area 11, a transfer area 12, and a welding area 13 arranged sequentially along a first horizontal direction.

[0026] like Figure 1 and Figure 2 As shown, within the transfer area 12, a first robotic arm 121, a gravity centering platform 122, a second robotic arm 123, and an NG platform 124 are sequentially arranged along a second horizontal direction, with the second horizontal direction perpendicular to the first horizontal direction. The loading and unloading area 11 has a pair of loading positions 111 near the first robotic arm 121 and a pair of unloading positions 112 near the second robotic arm 123, with a positioning camera 113 above each loading position 111.

[0027] The loading station 111 is used to input the plate 2 to be welded. The first robot arm 121 moves the plate 2 to the gravity-aligned platform 122 for positioning, and then sends it to the welding area 13 for welding. The positioning camera 113 is used to take pictures of the plate 2 when it arrives at the loading station 111, thereby guiding the first robot arm 121 to correctly pick up the plate 2. The gravity-aligned platform 122 has a herringbone three-dimensional structure, including a pair of symmetrical inclined ramps along the vertical plane. Both inclined ramps are rectangular, and each inclined ramp has baffles on its lower and outer edges. Because the plate 2 is difficult to grip on the rack, a suction cup is used for picking it up. To ensure that the first robot arm 121 can stably and accurately place the plate 2 into the movable fixture 132 and match its positioning, a secondary picking is performed using the gravity-aligned platform, which requires the use of the two inclined ramps. The unloading station 112 is used to output the plate 2 that has been welded normally. The NG station 124 is used to place the plate 2 that has not been welded normally. The welding here involves spot welding two layers of boards together. The end of the second robotic arm 123 is equipped with a gripper 1231. When gripping the board 2, the gripper 1231 is offset from the position of the movable fixture 132. The gripper 1231 is not only used to classify and place the board 2 into the unloading position 112 and the NG table 124, but also to pick up the board 2 to continue welding some of the weld points 21. The loading position 111 and the unloading position 112 are located on the same side of the workstation, so that the same aisle in the factory can be used for loading and unloading. In order to avoid conflicts between manual loading and unloading and the workstation's actions, one loading position 111 and one unloading position 112 are always in working state, while the other loading position 111 and the other unloading position 112 are in non-working state, realizing alternating work.

[0028] like Figures 2 to 4 As shown, the welding area 13 is equipped with a front slide rail 131 extending along a first horizontal direction, a movable clamp 132 moving along the front slide rail 131, a rear slide rail 133 parallel to the front slide rail 131, and multiple welding components 134 that move independently on the rear slide rail 133. The movable clamp 132 clamps the plate 2. The welding components 134 include a welding torch 1341, a telescopic module 1342 that drives the welding torch 1341 to extend and retract horizontally, a lifting module 1343 that drives the telescopic module 1342 to rise and fall, and a traveling mechanism 1344 that drives the lifting module 1343 to translate on the rear slide rail 133. The area above the front slide rail 131 is divided into a feeding station and a welding station. A first robot arm 121 is located on one side of the feeding station, a second robot arm 123 is located on one side of the welding station, and the welding components 134 are located on the other side of the welding station.

[0029] The movement of the movable fixture 132 on the front slide rail 131 and the movement of the welding assembly 134 on the rear slide rail 133 can both be achieved using a rack and pinion mechanism. When the movable fixture 132 stops at the feeding station, the first robotic arm 121 can place the plate 2 onto the movable fixture 132. After clamping the plate 2, the movable fixture 132 moves to the welding station for welding. Although the extension and retraction direction of the telescopic module 1342 is not necessarily along the first horizontal direction, the welding torch 1341 in each welding assembly 134 can move independently in the three-coordinate space. Therefore, even when the plate 2 remains stationary, the welding torch 1341 can adapt to the position of each welding point. In this embodiment, there are three sets of welding assemblies 134, which complete welding in sections, thereby improving welding efficiency. Therefore, welding is divided into two steps: welding on the movable fixture 132 and welding on the second robot arm 123. The first welding step is completed simultaneously by multiple welding components, resulting in high work efficiency. After the first welding step is completed, the plate 2 can be removed from the movable fixture 132. When the second welding step is performed on the second robot arm 123, the movable fixture 132 can return to the feeding station to receive the next plate 2, further saving welding time. The plate 2 that has completed the second welding step is directly sent to the unloading station by the second robot arm 123, resulting in a fast work pace.

[0030] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A plate welding workstation for rapid multi-point welding, characterized in that: The system includes a loading / unloading area, a transfer area, and a welding area arranged sequentially along a first horizontal direction. Within the transfer area, a first robotic arm, a second robotic arm, and an NG (no-load) station are arranged sequentially along a second horizontal direction. The loading / unloading area has a loading position near the first robotic arm and a unloading position near the second robotic arm. The welding area includes a front slide rail extending along the first horizontal direction, a movable clamp moving along the front slide rail, a rear slide rail parallel to the front slide rail, and multiple welding components moving independently on the rear slide rail. Above the front slide rail are a feeding station and a welding station. The first robotic arm is located on one side of the feeding station, the second robotic arm is located on one side of the welding station, and the welding components are located on the other side of the welding station.

2. The plate welding workstation for rapid multi-point welding according to claim 1, characterized in that: A gravity centering platform is provided between the first robotic arm and the second robotic arm. The gravity centering platform has a herringbone three-dimensional structure, including a pair of inclined slopes that are symmetrical along the vertical plane. Both inclined slopes are rectangular, and each inclined slope has baffles at its lower edge and outer edge.

3. The plate welding workstation for rapid multi-point welding according to claim 1, characterized in that: The loading position and the unloading position are a pair.

4. The plate welding workstation for rapid multi-point welding according to claim 1 or 3, characterized in that: A positioning camera is installed above each loading station.

5. The plate welding workstation for rapid multi-point welding according to claim 1, characterized in that: The welding assembly includes a welding torch, a telescopic module for driving the welding torch to extend and retract horizontally, a lifting module for driving the telescopic module to rise and fall, and a traveling mechanism for driving the lifting module to move horizontally on the rear slide rail.

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