A special tool for detecting torque of an automobile power battery mounting bracket

Abstract

A special tooling for torque testing of automotive power battery mounting brackets includes a testing groove fixed on a test bench, the shape of which matches the shape of the workpiece. Several through holes are provided in the groove, their positions matching the sleeve positions of the workpiece. Several cylinders are fixed to the lower end face of the test bench, with piston rods passing through the bench panel to press against the upper surface of the workpiece. This invention is specifically designed for torque testing of power battery mounting brackets with threaded sleeves, allowing for simultaneous testing of two bracket workpieces. The workpieces are fixed using cylinders, making operation convenient and requiring minimal space.

Description

Technical Field

[0001] This utility model relates to the field of aluminum workpiece manufacturing and inspection technology, specifically a special tooling for torque testing of automotive power battery mounting brackets. Background Technology

[0002] In new energy vehicles, the power battery is mounted on a tray, which is connected to the side beams of the chassis by bolts. The power battery mounting bracket extends into the cavity of the side beam profile as a nut. The bracket is made of aluminum profile. Several through holes are punched on the bracket profile, and a rivet nut is inserted into each through hole. The edge of the nut is fixed to the edge of the through hole of the profile by riveting. The threaded hole of the rivet nut can be screwed into bolts or other fasteners for anchoring and fixing to other bracket members.

[0003] After the bracket workpiece is manufactured, the riveting strength of the nut is usually tested by an assembly torque test. The process is as follows: First, clamp both ends of the bracket workpiece with a vise. Support the bottom of the workpiece with a test platform with holes, the position of the holes matching the position of the bolts on the workpiece. Then, place the bolts in the threaded holes of the nuts and tighten them with a torque wrench. Because the profile is relatively thin, the aluminum material is prone to cracking and deformation when subjected to greater pressure at the riveting edge. Therefore, during the test, after the bolt reaches the rated torque, the quality inspector observes whether the profile material at the edge of the sleeve has cracked, been damaged, or deformed. If any abnormalities are found, the workpiece is scrapped.

[0004] In routine torque testing, due to the large number of bracket workpieces to be sampled in each batch, quality inspectors repeatedly operate the vise to clamp and loosen the workpiece, which is very inefficient. Furthermore, improper force can damage and deform the two ends of the workpiece. Therefore, how to improve the testing efficiency of this workpiece and reduce the probability of damaging the workpiece structure is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this utility model is to provide a special tooling for torque testing of automotive power battery mounting brackets. It is specifically designed for torque testing of power battery mounting brackets with threaded sleeves, and can simultaneously test two bracket workpieces. The workpieces are fixed by a cylinder, making it convenient to operate and compact in size.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A special tooling for torque testing of automotive power battery mounting brackets includes a testing groove fixed on the table surface, the shape of which matches the shape of the workpiece; several through holes are provided on the groove, the positions of which match the sleeve positions of the workpiece; several cylinders are fixed on the lower end face of the table surface, the piston rods of which pass through the table surface and can press against the upper surface of the workpiece.

[0008] The structure of the detection groove effectively positions the workpiece around its perimeter, reducing local clamping and limiting, and minimizing damage to the workpiece surface.

[0009] Two parallel testing slots are fixed on the platform. A rotary cylinder is fixed to the lower end of the platform and installed in the middle of the two testing slots. A T-shaped pressure block is installed at the end of the piston rod of the rotary cylinder, and the lower part of the T-shaped pressure block matches the position of the groove of the testing slot.

[0010] The lower pressing part of the T-shaped pressure block can also be fitted with a flexible rubber or silicone pad to reduce damage to the profile surface. The rotary cylinder design prevents the pressure head from interfering with the loading and unloading path of the workpiece, thus improving operational efficiency.

[0011] The cylinder is connected to a solenoid valve via an air pipe. The solenoid valve is controlled by a manual knob, which is mounted on the side of the test bench.

[0012] A toolbox is installed at the bottom of the test bench. The toolbox can hold necessary testing tools such as torque wrenches and bolts for easy access by testing personnel.

[0013] The operating steps for the tooling are as follows:

[0014] (1) Place the two workpieces into the grooves of the two inspection slots;

[0015] (2) Turn the switch, rotate the cylinder 90 degrees and press down, and the T-shaped pressure head presses the workpieces on both sides;

[0016] (3) Use a torque wrench to test each bolt on the threaded hole of the sleeve;

[0017] (4) After the test is completed, unscrew the bolt, lift the rotating cylinder and rotate it 90 degrees to remove the workpiece and complete the test.

[0018] Advantages of this utility model:

[0019] (1) This utility model is specifically used for torque detection of power battery mounting brackets with threaded sleeves. It can detect two bracket workpieces at the same time. The workpieces are fixed in all directions by the detection groove, rotating cylinder and T-shaped pressure head, which greatly improves the detection efficiency compared with the previous one.

[0020] (2) This utility model greatly reduces the damage to the surface of the workpiece during the inspection and will not cause local deformation due to excessive local pressure.

[0021] (3) This utility model is easy to operate. Testing personnel only need simple training to operate it. Maintenance is also very convenient. Attached Figure Description

[0022] Figure 1 This is an elevation view of the present invention; (including the workpiece).

[0023] Figure 2 This is a side view of the present invention.

[0024] Figure 3 This is a structural elevation view of the workpiece;

[0025] Figure 4 This is a projection diagram of the workpiece end face.

[0026] Figure 5 This is an elevation view of the present invention (excluding the workpiece).

[0027] The components in the diagram are named as follows: 1-stand; 2-tool box; 3-inspection slot; 4-rotary cylinder; 5-T-shaped pressure block; 6-workpiece. Detailed Implementation

[0028] Example 1

[0029] A special tooling for torque testing of automotive power battery mounting brackets includes a test groove 3 fixed on the table surface of a frame 1. The shape of the groove of the test groove 3 matches the shape of the workpiece 6. Several through holes are provided on the groove, and their positions match the sleeve positions of the workpiece 6. Several cylinders are fixed on the lower end face of the table surface of the frame 1. The piston rod of the cylinder passes through the table panel and can press the upper surface of the workpiece 6.

[0030] Two parallel detection slots 3 are fixed on the table surface of the frame 1. A rotary cylinder 4 is fixed on the lower end face of the table surface of the frame 1 and is installed in the middle of the two detection slots 3. A T-shaped pressure block 5 is installed at the end of the piston rod of the rotary cylinder 4. The lower part of the T-shaped pressure block 5 matches the position of the groove of the detection slot 3.

[0031] The cylinder is connected to a solenoid valve via an air pipe. The solenoid valve is controlled by a manual knob, which is installed on the side of the test bench 1.

[0032] Tool box 2 is installed at the bottom of the stand 1.

Claims

1. A special tooling for detecting the torque of an automotive power battery mounting bracket, characterized in that: The test groove (3) is fixed on the table surface of the frame (1). The shape of the groove of the test groove (3) matches the shape of the workpiece (6). Several through holes are set on the groove, and their positions match the sleeve positions of the workpiece (6). Several cylinders are fixed on the lower end face of the table surface of the frame (1). The piston rod of the cylinder passes through the table panel and can press the upper surface of the workpiece (6).

2. The torque detection special tool for the automobile power battery mounting support according to claim 1, characterized in that: Two parallel detection slots (3) are fixed on the table surface of the frame (1). A rotary cylinder (4) is fixed on the lower end of the table surface of the frame (1) and installed in the middle of the two detection slots (3). A T-shaped pressure block (5) is installed at the end of the piston rod of the rotary cylinder (4). The lower part of the T-shaped pressure block (5) matches the position of the groove of the detection slot (3).

3. The torque detection special tool for the automobile power battery mounting support according to claim 1, characterized in that: The cylinder is connected to a solenoid valve via an air pipe. The solenoid valve is controlled by a manual knob, which is installed on the side of the stand (1).

4. The torque detection special tool for the automobile power battery mounting support according to claim 1, characterized in that: The toolbox (2) is installed at the bottom of the stand (1).

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