Laser spiral welding tool clamp for inner cavity of battery tray

Abstract

The utility model relates to a battery tray inner cavity laser spiral welding tool clamp which comprises a main rack, four pressing arms are arranged on the front side face and the rear side face of the main rack respectively, eight pressing arms are sequentially arranged on the left side face and the right side face of the main rack respectively, a plurality of installation through holes are formed in the pressing arms, a screw rod is installed in each installation through hole, and a screw rod is installed in each installation through hole. The screw rod penetrates through the mounting through hole, a pressing block is arranged at the end part of the screw rod below the pressing arm, an adjusting nut is arranged at the end part of the screw rod above the pressing arm, a spring is sleeved on the part of the screw rod between the pressing block and the pressing arm, and a main supporting plate is fixedly mounted on the main rack. By the adoption of the technical scheme, the spring is used for replacing a fixed pressing arm, each pressing point can obtain independent adjustable pressing force without complex adjustment, the pressing consistency effect can be guaranteed for materials with different effects, all parts on the tool are accurately positioned, the stability of the bottom plate sealing and welding procedure can be guaranteed, and the production efficiency is improved. And the welding yield is ensured to meet the requirement.

Description

Technical Field

[0001] The utility model relates to the field of welding fixtures, in particular to a laser spiral welding fixture for the inner cavity of a battery tray. Background Art

[0002] A battery tray for new energy vehicles includes a base plate. Usually, a center hole is set in the middle of the base plate when designing the base plate to facilitate the positioning and processing of the base plate. In production, it is necessary to weld 4 "T"-shaped beams, 1 left beam, 1 right beam, bracket base assembly, 3 first support plates, 2 second support plates, frames and other components on the base plate. The number of welding points reaches 289, and there are 12 straight welds, each with a length of 40mm, and the total straight weld length is 480mm. Due to the manufacturing tolerance of actual parts, the fitting surfaces of the parts are not absolutely flat at the design level, and a clamp is needed to press the welding surface together.

[0003] The current existing process is to use resistance welding and the traditional fixed pressure block method to position and clamp 4 T-beams, 1 left beam, and 1 right beam. There are many pressure points on each pressure arm. In actual use, the adjustment of each pressure point will cause the other pressure points to follow the adjustment. This makes the adjustment of the fixture very troublesome, and there will be differences in each set of parts, which will result in a very poor consistency in the pressing of the various parts on the bottom plate with the bottom plate, which will lead to a high welding defect rate and affect the inner cavity accuracy of the battery tray. Summary of the invention

[0004] The purpose of the utility model is to provide a laser spiral welding fixture for the inner cavity of a battery tray that can float and clamp parts, aiming to solve the problems of the current clamping method using fixed pressure blocks, difficulty in adjusting the fixture, poor pressing consistency, high welding defect rate and unstable inner cavity accuracy.

[0005] The technical solution adopted by the utility model is: a battery tray inner cavity laser spiral welding fixture, including a main frame, four pressure arms are respectively arranged on the front side and the rear side of the main frame, and eight pressure arms are respectively arranged on the left side and the right side of the main frame in sequence, and the pressure arms are driven by cylinders to perform a pressure action, and a plurality of mounting through holes are arranged on the pressure arms, and a screw rod is installed in each of the mounting through holes, and the screw rod passes through the mounting through hole, and a pressure block is arranged on the end of the screw rod below the pressure arm, and an adjusting nut is arranged on the end of the screw rod above the pressure arm. A spring is provided on the rod at the position between the pressure block and the pressure arm, and positioning pins are also provided on the pressure arms on the front and rear sides of the main frame, positioning pins are respectively provided on the two outer pressure arms on the left side, and positioning pins are respectively provided on the two outer pressure arms on the right side. A "T"-shaped beam top positioning socket is also provided on the pressure arm on the rear side of the main frame, a main support plate is fixedly installed on the main frame, two bottom plate center hole positioning pins are provided in the middle of the main support plate, and a telescopic positioning mechanism and a limit positioning block outside the frame are provided on the periphery of the main support plate.

[0006] A further technical solution of the utility model is that a material detection device is arranged on the middle part of the main support plate.

[0007] A further technical solution of the utility model is that robot gripper avoidance openings are arranged at the four corners of the main support plate, so as to facilitate loading and unloading of materials using robot grippers on an automated production line.

[0008] A further technical solution of the utility model is: welding point avoidance holes are opened on the surface of the main support plate, and the welding point avoidance holes correspond to the welding point positions on the bottom plate of the battery tray one by one.

[0009] The beneficial effect of the utility model is: due to the adoption of the above-mentioned technical scheme, a battery tray inner cavity laser spiral welding fixture of the utility model uses a spring instead of a fixed pressure arm, and each pressure point can obtain an independent and adjustable pressing force without complicated adjustment. When facing materials with different effects, the pressing consistency effect can be guaranteed, the inner cavity precision is high and stable, and all parts on the fixture are precisely positioned, which can ensure the stability of the bottom plate sealing process and the high welding yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of a laser spiral welding fixture for the inner cavity of a battery tray described in the utility model;

[0011] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0012] Figure 3It is a schematic diagram of the top view of the structure of a laser spiral welding fixture for the inner cavity of a battery tray described in the utility model. DETAILED DESCRIPTION

[0013] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Example:

[0015] like Figures 1 to 3 The laser spiral welding fixture for the inner cavity of a battery tray shown in the figure comprises a main frame 1, four pressure arms 2 are respectively arranged on the front side and the rear side of the main frame 1, and eight pressure arms 2 are respectively arranged on the left side and the right side of the main frame in sequence, and the pressure arms are driven by cylinders to perform a pressure action, and a plurality of mounting through holes are arranged on the pressure arms, and a screw is installed in each of the mounting through holes, and the screw passes through the mounting through holes, and a pressure block 4 is arranged on the end of the screw below the pressure arm, and an adjusting nut 5 is arranged on the end of the screw above the pressure arm, and a spring 6 is installed on the part of the screw between the pressure block and the pressure arm, and a spring 6 is arranged on the front of the main frame. Positioning pins are also provided on the pressure arms on the side and rear sides, positioning pins are respectively provided on the two outer pressure arms on the left side, and positioning pins are respectively provided on the two outer pressure arms on the right side. The pressure arms on the rear side of the main frame are also provided with a "T"-shaped beam top positioning snap-on 7. A main support plate 8 is fixedly installed on the main frame, and two bottom plate center hole positioning pins 83 are provided in the middle of the main support plate. A telescopic positioning mechanism 11 and an outer limit positioning block 12 of the frame are provided on the periphery of the main support plate. The telescopic positioning mechanism can tighten the bottom plate around after the bottom plate is placed in the tooling, and the outer limit positioning block of the frame can position the frame on the bottom plate.

[0016] Furthermore, a material detection device 81 is provided on the middle portion of the main support plate.

[0017] Furthermore, a robot gripper avoidance opening 9 is provided on the main support plate.

[0018] Furthermore, welding point avoidance holes 82 are opened on the surface of the main support plate. Because laser welding will penetrate the base material, it is necessary to open holes 82 on the support plate to avoid welding the parts and the main support plate together. The welding point avoidance holes correspond one-to-one to the welding point positions on the bottom plate of the battery tray.

[0019] This tooling is controlled by an electrical automatic control system. In the initial state, all the pressing arms are in the raised state. After the processing procedure begins, the robot gripper places the battery tray base plate into the tooling. After the base plate is placed in the tooling, it is positioned by the positioning pins in the center hole of the base plate. Then the robot gripper continues to load the "T" beam, left beam, right beam, bracket base assembly, frame and other sub-parts into the tooling and places each sub-part in each position as required. After completing the workpiece placement procedure, the robot gripper stops working and starts the electrical automatic control system to control the pressing arm to press down. The staff checks the clamping status of each part in the tooling. If there is any place that is not clamped in place, it can be adjusted by adjusting the nut to ensure that each part fits tightly with the base plate. Finally, the welding process can be carried out.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser spiral welding fixture for the inner cavity of a battery tray, characterized by: The utility model comprises a main frame, wherein four pressure arms are respectively arranged on the front side and the rear side of the main frame, and eight pressure arms are respectively arranged on the left side and the right side of the main frame in sequence, wherein the pressure arms are driven by cylinders to perform pressure action, and a plurality of mounting through holes are arranged on the pressure arms, and a screw rod is installed in each mounting through hole, and the screw rod passes through the mounting through hole, and a pressure block is arranged on the end of the screw rod located below the pressure arm, and an adjusting nut is arranged on the end of the screw rod located above the pressure arm, and the screw rod is sleeved on the part located between the pressure block and the pressure arm. It is equipped with springs, and positioning pins are also provided on the pressure arms on the front and rear sides of the main frame, positioning pins are respectively provided on the two outer pressure arms on the left side, and positioning pins are respectively provided on the two outer pressure arms on the right side. The pressure arm on the rear side of the main frame is also provided with a "T"-shaped beam top positioning snap-in. A main support plate is fixedly installed on the main frame, and two bottom plate center hole positioning pins are provided in the middle of the main support plate. A telescopic positioning mechanism and a limit positioning block outside the frame are provided on the periphery of the main support plate.

2. According to claim 1, a laser spiral welding fixture for the inner cavity of a battery tray is characterized by: A material detection device is arranged on the middle part of the main support plate.

3. According to claim 1, a laser spiral welding fixture for the inner cavity of a battery tray is characterized by: The four corners of the main support plate are provided with robot gripper avoidance openings.

4. A laser spiral welding fixture for the inner cavity of a battery tray according to any one of claims 1 to 3, characterized in that: The main support plate is provided with welding point avoidance holes, and the welding point avoidance holes correspond one to one with the welding point positions on the bottom plate of the battery tray.

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