A pressing mechanism for welding automobile parts

Abstract

The utility model discloses a kind of automobile parts welding pressure mechanism, it is related to automobile parts welding fixture field, and this kind of automobile parts welding pressure mechanism includes bottom plate, supporting seat is fixed on the middle position of bottom plate top surface, and bottom plate top surface is located at the both sides of supporting seat and is provided with several groups of clamp;This kind of automobile parts welding pressure mechanism is driven by the cooperation of linear motor and guide rod cylinder, realizes the automatic transfer of welding workpiece, specifically, linear motor moves along the length direction perpendicular to bottom plate, drives support strip and transverse plate transverse displacement, and guide rod cylinder makes it accurate with the bottom surface of welding finished piece by lifting support strip through extension end, this structure significantly reduces the demand of manual intervention, realizes seamless connection of welding-unloading process, effectively shortens production rhythm, improves production line automation level.

Description

Technical Field

[0001] This utility model relates to the field of welding fixtures for automotive parts, and in particular to a clamping mechanism for welding automotive parts. Background Technology

[0002] The welding manufacturing process of automotive body panels typically adopts a sub-assembly welding assembly method, which includes the following steps: First, the stamped main structural component is positioned on the welding fixture base. Then, according to the assembly design requirements, several reinforcing plates, reinforcement parts and other sub-assembly components are precisely assembled to the predetermined positions of the main structural component. The three-dimensional spatial positioning and clamping of each sub-assembly is achieved by pneumatic or hydraulic clamping mechanisms, followed by spot welding or continuous welding processes.

[0003] Current welding fixture systems suffer from the following technical deficiencies: equipment functionality is limited to workpiece positioning and clamping, lacking automated unloading devices. After welding, manual workpiece disassembly and re-clamping of new workpieces are required, leading to significant production cycle time losses. More specifically, operators must manually unload workpieces after each welding process and reposition and assemble the main structural components and sub-assemblies. This manual intervention severely restricts the automation level and overall operating efficiency of the welding production line. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a clamping mechanism for welding automotive parts, which solves the problem that existing automotive body panel welding fixtures cannot automatically unload materials after the welding process, thus restricting the operating efficiency of the welding production line.

[0005] To address the problems in the existing technology, the technical solution of this utility model is as follows:

[0006] A clamping mechanism for welding automotive parts includes a base plate. A support seat is fixed at the center of the top surface of the base plate. Several sets of clamps are provided on both sides of the support seat on the top surface of the base plate. The sets of clamps and the support seat are arranged along the length direction of the base plate. A material unloading conveying mechanism is installed at the center of the top surface of the base plate. The conveying direction of the material unloading conveying mechanism is perpendicular to the length direction of the base plate. The material unloading conveying mechanism is used to transport the welded and assembled automotive parts from the welding station for unloading.

[0007] The material feeding and conveying mechanism includes a movable component fixed at the center of the top surface of the base plate, and support bars respectively set on the two output ends of the movable component. The top surface shape of the support bar matches the bottom surface shape of the welded automotive part. Both ends of the support bar have a stop bar protruding from the top surface of the support bar. Through the conformal matching design between the top surface of the support bar and the shape of the workpiece, combined with the limiting function of the stop bar, it is ensured that the workpiece has no risk of deviation or slippage during the conveying process.

[0008] Preferably, the moving component includes a linear motor symmetrically fixed at the center of the top surface of the base plate. The length direction of the linear motor is perpendicular to the length direction of the base plate. A support bar is fixed to the moving end of the linear motor. A horizontal plate is fixed to the top surface of the support bar. A guide rod cylinder is fixed to the center of the horizontal plate. Two support bars are respectively installed on the extended ends of the two guide rod cylinders.

[0009] Preferably, a weight measuring component is provided at the connection between the support strip and the extended end of the guide rod cylinder. The weight measuring component includes a measuring plate fixed to the extended end of the guide rod cylinder, a lifting plate slidably mounted on the top surface of the measuring plate, the support strip fixed on the top surface of the lifting plate, a pressure sensor fixed on the top surface of the measuring plate, the pressure sensor being located at the center of the top surface of the measuring plate, and the lifting plate resting on the measuring surface of the pressure sensor. Through the linkage design of the pressure sensor and the lifting plate, dynamic weight monitoring is constructed, which can realize the effect of detecting whether there are any missing welded parts after the welding of the cover part is completed, and prevent defective parts from flowing into subsequent processes.

[0010] Preferably, the lifting plate is slidably connected to the measuring plate via four telescopic rods. The four telescopic rods are respectively arranged at the four corners of the top surface of the measuring plate. Each telescopic rod consists of a sleeve and a sliding rod. The bottom surface of the sleeve is fixed to the top surface of the measuring plate, and the sliding rod is slidably inserted into the sleeve, with its top surface fixed to the bottom surface of the lifting plate. The four-corner telescopic rod guide structure between the lifting plate and the measuring plate eliminates off-center load interference and ensures measurement accuracy.

[0011] Compared with the prior art, the advantages of this utility model are as follows:

[0012] 1. This utility model achieves automated transfer of welded workpieces through the coordinated drive of a linear motor and a guide rod cylinder. Specifically, the moving end of the linear motor moves along the length direction perpendicular to the base plate, causing the support bar and cross plate to shift laterally, while the guide rod cylinder raises and lowers the support bar through its extended end, making it precisely fit with the bottom surface of the welded workpiece. This structure significantly reduces the need for manual intervention, achieves seamless connection between welding and unloading processes, effectively shortens the production cycle, and improves the automation level of the production line.

[0013] 2. This utility model achieves dynamic weight monitoring through the linkage design of pressure sensor and lifting plate. When the support bar supports the welding assembly, the theoretical weight range of the workpiece is preset as a threshold parameter. The pressure sensor collects the force data of the support bar in real time. If the actual weight deviates from the threshold, it can be determined that there is a missing welded part, thus preventing defective parts from flowing into subsequent processes. This technical solution strengthens the quality control capability from the perspective of process control and greatly reduces the rework rate and quality cost. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram showing the positional relationship between the guide rod cylinder and the horizontal plate of this utility model.

[0016] Figure 3 This is a schematic diagram showing the location of the pressure sensor of this utility model.

[0017] Reference numerals: 1. Base plate; 2. Support seat; 3. Clamp; 4. Linear motor; 5. Support bar; 6. Horizontal plate; 7. Guide rod cylinder; 8. Measuring plate; 9. Sleeve; 10. Slide rod; 11. Lifting plate; 12. Support bar; 13. Stop bar; 14. Pressure sensor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figures 1 to 3 This embodiment provides a clamping mechanism for welding automotive parts, including a base plate 1. A support seat 2 is fixed at the center of the top surface of the base plate 1. Several sets of clamps 3 are provided on both sides of the support seat 2 on the top surface of the base plate 1. The sets of clamps 3 and the support seat are arranged along the length of the base plate 1. The clamps 3 include a support plate fixed to the top surface of the base plate 1. The upper end of the support plate has a support surface that supports the main structural component and is adapted to the bottom shape of the main structural component. A clamping bar is hinged to the upper end of the support plate. A first cylinder is hinged to the lower end of the support plate. The extended end of the first cylinder is hinged to the end of the clamping bar. The end of the clamping bar away from the first cylinder forms a clamping surface facing the support surface. The clamping surface is adapted to the top shape of the sub-assembly component. The entire clamp 3 is a mature existing technology, so its operating principle will not be described in detail here.

[0020] Two linear motors 4 are symmetrically fixed at the center of the top surface of the base plate 1. The linear motors 4 are located on either side of the support base 2, with their length direction perpendicular to the length direction of the base plate 1. A support bar 5 is fixed to the moving end of each linear motor 4. A horizontal plate 6 is fixed to the top surface of the support bar 5. A guide rod cylinder 7 is fixed to the center of the horizontal plate 6. A measuring plate 8 is fixed to the extended end of the guide rod cylinder 7. A sleeve 9 is fixed to each of the four corners of the top surface of the measuring plate 8. A sliding rod 10 is slidably inserted into each sleeve 9. A lifting plate 11 is fixed to the top of each of the four sliding rods 10. The four-corner telescopic rod guide structure between the lifting plate 11 and the measuring plate 8 eliminates off-center load interference, ensuring measurement accuracy.

[0021] A support strip 12 is fixed to the top surface of the lifting plate 11. The shape of the top surface of the support strip 12 matches the bottom surface shape of the welded main structural component. Both ends of the support strip 12 have stop strips 13 protruding from the top surface of the support strip 12. Through the contour matching design between the top surface of the support strip 12 and the shape of the workpiece, combined with the limiting function of the stop strips 13, it is ensured that there is no risk of the workpiece shifting or slipping during the conveying process.

[0022] A pressure sensor 14 is fixed on the top surface of the measuring plate 8. The pressure sensor 14 is located at the center of the top surface of the measuring plate 8. The lifting plate 11 is placed on the measuring surface of the pressure sensor 14. Through the linkage design of the pressure sensor 14 and the lifting plate 11, dynamic weight monitoring can be achieved. This can detect whether there are any missing welded parts after the cover part is welded, thus preventing defective parts from flowing into subsequent processes.

[0023] Working principle:

[0024] First, the main structural components are placed on the support surfaces of several clamps 3, and the main structural components are also placed on the top surface of the support base. Then, the sub-assembly components are placed in specific positions in sequence. Then, the first cylinder on the clamp 3 extends and pushes the clamping bar to flip, so that the pressing surface of the clamping bar presses the sub-assembly part onto the main structural components, completing the clamping work. Then, the welding gun can be operated to perform spot welding work.

[0025] After welding is completed, clamp 3 is released, and two guide rod cylinders 7 extend, allowing the support strip 12 to support the main structural component and separate the welded cover from clamp 3. Then, two linear motors 4 work, driving the cover to move along the width direction of the base plate 1 to one side of the base plate 1. During the production process, two conveyor belts are set on one side of the length direction of the base plate 1. The linear motors 4 transport the cover to the top of the two conveyor belts. Then, the guide rod cylinders 7 retract, placing the cover on the conveyor belt, completing the unloading process and achieving the effect of automatic unloading, which greatly saves manual operation steps and improves welding efficiency.

[0026] After the support bar 12 supports the main structural component and separates from the clamp 3, the main structural component presses down on the lifting plate 11, and the lifting plate 11 presses down on the pressure sensor 14. By comparing the detection value of the pressure sensor 14 with the set threshold, it can be determined whether there are any missing parts in the sub-assembly components, thus achieving the effect of automatic detection.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamping mechanism for welding automotive parts, comprising a base plate (1), wherein a support seat (2) is fixed at the center of the top surface of the base plate (1), and a plurality of clamps (3) are provided on both sides of the support seat (2) on the top surface of the base plate (1), the plurality of clamps (3) and the support seat (2) being arranged along the length direction of the base plate (1), characterized in that, A material feeding conveyor is installed at the middle position of the top surface of the base plate (1). The conveying direction of the material feeding conveyor is perpendicular to the length direction of the base plate (1). The material feeding conveyor is used to transport the welded and assembled automobile parts from the welding station. The material feeding and conveying mechanism includes a movable component fixed at the middle position of the top surface of the base plate (1) and a support strip (12) respectively set on the two output ends of the movable component. The top surface shape of the support strip (12) matches the bottom surface shape of the welded automobile part.

2. The clamping mechanism for welding automotive parts according to claim 1, characterized in that, Both ends of the support strip (12) have a stop strip (13) protruding from the top surface of the support strip (12).

3. The clamping mechanism for welding automotive parts according to claim 1, characterized in that, The moving component includes a linear motor (4) symmetrically fixed at the middle position of the top surface of the base plate (1). The length direction of the linear motor (4) is perpendicular to the length direction of the base plate (1). A support bar (5) is fixed to the moving end of the linear motor (4). A horizontal plate (6) is fixed to the top surface of the support bar (5). A guide rod cylinder (7) is fixed to the middle of the horizontal plate (6). Two support bars (12) are respectively installed on the extended ends of the two guide rod cylinders (7).

4. The clamping mechanism for welding automotive parts according to claim 3, characterized in that, A weight measuring component is provided at the connection between the support bar (12) and the extended end of the guide rod cylinder (7).

5. The clamping mechanism for welding automotive parts according to claim 4, characterized in that, The weight measuring assembly includes a measuring plate (8) fixed to the extended end of the guide rod cylinder (7), a lifting plate (11) slidably mounted on the top surface of the measuring plate (8), a support strip (12) fixed on the top surface of the lifting plate (11), a pressure sensor (14) fixed on the top surface of the measuring plate (8), and the lifting plate (11) resting on the measuring surface of the pressure sensor (14).

6. The clamping mechanism for welding automotive parts according to claim 5, characterized in that, The lifting plate (11) is slidably connected to the measuring plate (8) by four telescopic rods, which are respectively arranged at the four corners of the top surface of the measuring plate (8).

7. The clamping mechanism for welding automotive parts according to claim 6, characterized in that, The telescopic rod consists of a sleeve (9) and a sliding rod (10). The bottom surface of the sleeve (9) is fixed to the top surface of the measuring plate (8). The sliding rod (10) is slidably inserted into the sleeve (9), and the top surface of the sliding rod (10) is fixed to the bottom surface of the lifting plate (11).

8. The clamping mechanism for welding automotive parts according to claim 5, characterized in that, The pressure sensor (14) is located at the center of the top surface of the measuring plate (8).

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