Strength testing device for stainless steel spot-welded joint

Abstract

The utility model discloses a strength test device for a stainless steel spot welding joint, which comprises a test box, a clamping mechanism comprises a mounting plate fixed at the bottom of the inner wall of the test box, the top of the mounting plate is rotatably connected with a rotating rod, a gear is fixed at the top of the outer wall of the rotating rod, and mounting blocks are arranged on two sides of the top of the mounting plate. Racks are fixed to the faces, close to each other, of the two mounting blocks, the two mounting blocks are arranged in a staggered mode, a fixing frame is fixed to the top of the mounting plate, communicating through grooves are formed in the two sides of the top of the fixing frame, L-shaped fixing rods are fixed to the tops of the two mounting blocks, and the two L-shaped fixing rods penetrate through the through grooves. Arc-shaped clamping blocks are fixed to the faces, close to each other, of the two through grooves. According to the utility model, the two arc-shaped clamping blocks are driven by the single motor to clamp and fix the spot welding joint, the test cost is saved, the two arc-shaped clamping blocks move synchronously to fix the spot welding joint, and the reliability of the test result is improved.

Description

Technical Field

[0001] This utility model relates to the field of spot welded joint testing technology, and in particular to a strength testing device for stainless steel spot welded joints. Background Technology

[0002] Spot welded joints are metal connections made using a spot welding process. Spot welding, as a common and efficient welding method, is widely used for joining thin-walled metal materials, playing a crucial role, especially in automotive manufacturing, home appliances, and electronic products. After production, rigorous strength tests must be conducted to ensure the reliability and strength of the spot welded joint. Insufficient strength in the welded joint may lead to structural failure, resulting in potential safety hazards.

[0003] When performing strength tests on spot welded joints, they typically need to be clamped and fixed. Currently, the common method is to use multiple electric actuators to drive the clamps. This method not only increases the cost of spot welded joint testing but also raises subsequent maintenance costs. Furthermore, multiple electric actuators may become asynchronous, leading to deviations during clamping and affecting subsequent test results. Therefore, there is an urgent need for a strength testing device for stainless steel spot welded joints to solve these problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a strength testing device for stainless steel spot welded joints.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A strength testing device for stainless steel spot welded joints includes a test chamber, a fixed frame inside the test chamber, a spot welded joint above the fixed frame, a clamping mechanism for clamping and fixing the spot welded joint below the fixed frame, and a test mechanism for performing strength testing on the spot welded joint at the top inside the test chamber.

[0007] The clamping mechanism includes a mounting plate fixed to the bottom of the inner wall of the test chamber. A rotating rod is rotatably connected to the top of the mounting plate. A gear is fixed to the top of the outer wall of the rotating rod. Mounting blocks are provided on both sides of the top of the mounting plate. A rack is fixed to the side of each mounting block that is close to each other. The racks mesh with the sides of the gear respectively. The two mounting blocks are staggered. A fixing frame is fixed to the top of the mounting plate. Through slots are provided on both sides of the top of the fixing frame. An L-shaped fixing rod is fixed to the top of each mounting block. The two L-shaped fixing rods pass through the through slots. An arc-shaped clamping block is fixed to the side of each through slot that is close to each other.

[0008] Preferably, the inner walls of both of the arc-shaped clamping blocks are equipped with anti-slip pads.

[0009] Preferably, a placement platform is fixed to the top of the mounting bracket, a pressure sensor is embedded in the top of the placement platform, and a spot weld joint is placed on the top of the pressure sensor.

[0010] Preferably, the mounting plate has grooves on both sides of its top, and sliders are slidably installed inside the two grooves. The tops of the two sliders are fixedly connected to the bottoms of the two mounting blocks, respectively.

[0011] Preferably, a motor is mounted on the bottom of the mounting plate, and the output shaft of the motor is fixedly connected to the bottom of the rotating rod.

[0012] Preferably, the testing mechanism includes a fixing plate fixed to the top of the test chamber, a cylinder is mounted on the top of the fixing plate, and a pressure plate is fixed through the output shaft of the cylinder.

[0013] Preferably, a camera is installed on one side of the inner wall of the test chamber, and a transparent protective cover is installed on the outer surface of the camera.

[0014] Preferably, a control box is provided on the top of the inner wall of the test chamber, and a display screen is provided on one side of the control box. The camera and pressure sensor are electrically connected to the display screen through wires.

[0015] Preferably, the outer wall of the test chamber is provided with a sealed door, and the outer wall of the sealed door is provided with an observation window.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. Due to the use of a clamping mechanism, a motor drives a gear to rotate, which meshes with two racks. The two mounting blocks move closer to each other, which in turn drives two L-shaped fixing rods to move closer to each other. This causes two arc-shaped clamping blocks to move synchronously and move closer to the outer wall of the spot welded head to clamp and fix it. This achieves the effect of using a single motor to drive two arc-shaped clamping blocks to clamp and fix the spot welded head, saving test costs. It also achieves synchronous movement of the two arc-shaped clamping blocks to fix the spot welded head, increasing clamping accuracy, improving the reliability of test results, and helping to improve the service life and stability of the equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional partial structural diagram of a strength testing device for stainless steel spot welded joints proposed in this utility model;

[0019] Figure 2 This is a partial structural diagram of the internal structure of the test chamber of a strength testing device for stainless steel spot welded joints proposed in this utility model.

[0020] Figure 3 This is a partial structural diagram of the clamping mechanism of a strength testing device for stainless steel spot welded joints proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the second part of the clamping mechanism of the strength testing device for stainless steel spot welded joints proposed in this utility model;

[0022] Figure 5 This is a partial structural diagram of the test mechanism of a strength testing device for stainless steel spot welded joints proposed in this utility model.

[0023] In the diagram: 1. Test chamber; 101. Sealed door; 102. Observation window; 2. Control box; 201. Display screen; 3. Fixing plate; 301. Pressure plate; 302. Transparent protective cover; 303. Camera; 304. Cylinder; 4. Mounting plate; 401. Fixing frame; 402. Motor; 403. Through groove; 404. L-shaped fixing rod; 405. Arc-shaped clamping block; 406. Anti-slip pad; 407. Mounting block; 408. Slider; 409. Slide groove; 410. Rack; 411. Gear; 412. Rotating rod; 5. Placement platform; 501. Pressure sensor; 502. Spot welded joint. Detailed Implementation

[0024] 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.

[0025] Reference Figure 1-5 A strength testing device for stainless steel spot welded joints includes a test chamber 1. The test chamber 1 is equipped with a fixing frame 401 inside, a spot welded joint 502 is provided above the fixing frame 401, a clamping mechanism for clamping and fixing the spot welded joint 502 is provided below the fixing frame 401, and a test mechanism for conducting strength tests on the spot welded joint 502 is provided at the top inside the test chamber 1.

[0026] The clamping mechanism includes a mounting plate 4 fixed to the bottom of the inner wall of the test chamber 1. A rotating rod 412 is rotatably connected to the top of the mounting plate 4. A gear 411 is fixed to the top of the outer wall of the rotating rod 412. Mounting blocks 407 are provided on both sides of the top of the mounting plate 4. A rack 410 is fixed to the side of the two mounting blocks 407 that is close to each other. The two racks 410 mesh with the sides of the gear 411 respectively. The two mounting blocks 407 are staggered. A fixing frame 401 is fixed to the top of the mounting plate 4. Through slots 403 are opened on both sides of the top of the fixing frame 401. An L-shaped fixing rod 404 is fixed to the top of the two mounting blocks 407. The two L-shaped fixing rods 404 pass through the through slots 403. An arc-shaped clamping block 405 is fixed to the side of the two through slots 403 that is close to each other.

[0027] In this utility model, anti-slip pads 406 are installed on the inner walls of both arc-shaped clamping blocks 405.

[0028] In this utility model, a placement platform 5 is fixed to the top of the fixing frame 401, a pressure sensor 501 is embedded in the top of the placement platform 5, and a spot welding head 502 is placed on the top of the pressure sensor 501.

[0029] In this utility model, the top two sides of the mounting plate 4 are provided with sliding grooves 409, and the sliding sliders 408 are slidably provided inside the two sliding grooves 409. The tops of the two sliders 408 are respectively fixedly connected to the bottoms of the two mounting blocks 407.

[0030] In this utility model, a motor 402 is installed at the bottom of the mounting plate 4, and the output shaft of the motor 402 is fixedly connected to the bottom of the rotating rod 412.

[0031] In this utility model, the testing mechanism includes a fixing plate 3 fixed inside the top of the test chamber 1, a cylinder 304 is installed on the top of the fixing plate 3, and the output shaft of the cylinder 304 passes through the fixing plate 3 and is fixed with a pressure plate 301.

[0032] In this invention, a camera 303 is installed on one side of the inner wall of the test chamber 1, and a transparent protective cover 302 is installed on the outer surface of the camera 303.

[0033] In this utility model, a control box 2 is provided on the top of the inner wall of the test chamber 1, and a display screen 201 is provided on one side of the control box 2. The camera 303 and the pressure sensor 501 are electrically connected to the display screen 201 through wires.

[0034] In this utility model, a sealing door 101 is provided on one side of the outer wall of the test chamber 1, and an observation window 102 is provided on the outer wall of the sealing door 101.

[0035] Working principle: In use, the spot welding head 502 is first placed on top of the pressure sensor 501. Then, the motor 402 is run, which drives the rotating rod 412 to rotate, and in turn drives the gear 411 to rotate. The gear 411 meshes with the two racks 410 respectively, and through the racks 410, the two mounting blocks 407 move closer to each other, thus achieving synchronous movement. The mounting blocks 407 drive the slider 408 to slide in the groove 409, and drive the corresponding L-shaped fixing rod 404 to move. At this time, the two L-shaped fixing rods 404 move synchronously and move closer to each other. The two L-shaped fixing rods 404 drive the arc-shaped clamping block 405 to approach the bottom of the outer wall of the spot welding head 502 and clamp and fix it. By using a single gear 411 to clamp and fix the spot welding head 502, the cost of testing is saved. The system achieves simultaneous clamping and fixing of the outer walls at both ends of the spot welded head 502. Then, by operating cylinder 304, the pressure plate 301 moves downwards. When the pressure plate 301 contacts the top of the spot welded head 502, the camera 303 transmits the image to the display screen 201 for observation by the staff. The pressure plate 301 then presses against the spot welded head 502, which in turn presses against the pressure sensor 501. The image observed by the camera 303 and the pressure data transmitted by the pressure sensor 501 are compared and analyzed until the spot welded head 502 breaks. The strength of the spot welded head 502 is then analyzed through the pressure data and image analysis. Finally, the sealing door 101 is opened, and the spot welded head 502 can be removed, allowing the next one to be placed in for testing.

[0036] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A strength testing device for stainless steel spot welded joints, comprising a test chamber (1), characterized in that, The test chamber (1) is equipped with a fixing frame (401) inside, a spot welding head (502) is provided above the fixing frame (401), a clamping mechanism for clamping and fixing the spot welding head (502) is provided below the fixing frame (401), and a test mechanism for conducting strength tests on the spot welding head (502) is provided at the top inside the test chamber (1). The clamping mechanism includes a mounting plate (4) fixed to the bottom of the inner wall of the test chamber (1). A rotating rod (412) is rotatably connected to the top of the mounting plate (4). A gear (411) is fixed to the top of the outer wall of the rotating rod (412). Mounting blocks (407) are provided on both sides of the top of the mounting plate (4). A rack (410) is fixed to the side of the two mounting blocks (407) that are close to each other. The two racks (410) are respectively connected to the sides of the gear (411). The two mounting blocks (407) are engaged and staggered. A fixing frame (401) is fixed on the top of the mounting plate (4). Through slots (403) are opened on both sides of the top of the fixing frame (401). An L-shaped fixing rod (404) is fixed on the top of each of the two mounting blocks (407), and both L-shaped fixing rods (404) pass through the through slots (403). An arc-shaped clamping block (405) is fixed on the side of each of the two through slots (403) that are close to each other.

2. The strength testing device for stainless steel spot welded joints according to claim 1, characterized in that, The inner walls of both of the arc-shaped clamping blocks (405) are fitted with anti-slip pads (406).

3. The strength testing device for stainless steel spot welded joints according to claim 1, characterized in that, The top of the mounting bracket (401) is fixed with a placement platform (5), and a pressure sensor (501) is embedded in the top of the placement platform (5). A spot weld head (502) is placed on the top of the pressure sensor (501).

4. The strength testing device for stainless steel spot welded joints according to claim 1, characterized in that, The mounting plate (4) has grooves (409) on both sides of its top. Sliding blocks (408) are slidably provided inside the two grooves (409). The tops of the two sliding blocks (408) are fixedly connected to the bottoms of the two mounting blocks (407).

5. The strength testing device for stainless steel spot welded joints according to claim 1, characterized in that, A motor (402) is mounted on the bottom of the mounting plate (4), and the output shaft of the motor (402) is fixedly connected to the bottom of the rotating rod (412).

6. The strength testing device for stainless steel spot welded joints according to claim 1, characterized in that, The test mechanism includes a fixing plate (3) fixed inside the top of the test chamber (1), and a cylinder (304) is installed on the top of the fixing plate (3). The output shaft of the cylinder (304) passes through the fixing plate (3) and a pressure plate (301) is fixed thereon.

7. The strength testing device for stainless steel spot welded joints according to claim 6, characterized in that, A camera (303) is installed on one side of the inner wall of the test chamber (1), and a transparent protective cover (302) is installed on the outer surface of the camera (303).

8. The strength testing device for stainless steel spot welded joints according to claim 1, characterized in that, The test chamber (1) has a control box (2) on the top of its inner wall. The control box (2) has a display screen (201) on one side, and the camera (303) and pressure sensor (501) are electrically connected to the display screen (201) via wires.

9. The strength testing device for stainless steel spot welded joints according to claim 1, characterized in that, The test chamber (1) has a sealed door (101) on one side of its outer wall, and an observation window (102) is provided on the outer wall of the sealed door (101).

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