Hand-held piston symmetry degree testing fixture

Abstract

The utility model relates to the technical field of casting detection tools, and especially relates to a hand-held piston symmetry degree detection tool. The device comprises an angular positioning seat, an angular positioning block slidably installed in the angular positioning seat, a V-shaped block installed on the angular positioning seat, profiling positioning blocks respectively arranged at two ends of the V-shaped block through fixing pieces, and a dial indicator embedded in the V-shaped block. A sliding groove for the angular positioning block to slide is formed in the angular positioning seat, a compression spring is arranged in the sliding groove, one end of the compression spring is connected with the inner wall of the sliding groove, the other end of the compression spring is connected with the side face of the angular positioning block, and two sets of contact blocks are arranged at the front end of the angular positioning block. The beneficial effects of the utility model are that the V-shaped block is matched with the profiling positioning blocks at the two ends, thereby being capable of well adapting to the circular structure of the piston, realizing the precise positioning of the outer diameter of the piston, and ensuring the detection accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of casting inspection tools, in particular to a handheld piston symmetry inspection tool. Background Art

[0002] Existing technology, application number: CN2022234170547, a forged steel wedge gate valve sealing surface symmetry rapid detection tool, which uses visual inspection for detection, the detection accuracy is not high, and the human eye is prone to error; the existing product engine piston, the structure is an outer diameter circle + outer diameter circle with two concave symmetrical side walls, now need to detect the symmetry of the two side walls AB ≤ 0.6 (side wall surface 1, side wall surface 2) can refer to Figure 3 As shown, currently only three-dimensional testing can be used to determine the symmetry of the two side walls of the engine piston (AB≤0.6). However, the three-dimensional testing method is inefficient and seriously affects the production progress. The piston has a special structure, with a circular outer diameter, a non-cylindrical outer diameter, and two concave symmetrical side walls. In addition, there is a drop in the side walls, making it difficult to stabilize the product and unable to use general inspection fixtures for testing.

[0003] Therefore, it is necessary to design a handheld piston symmetry testing tool to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a handheld piston symmetry testing tool to overcome the above-mentioned deficiencies in the current prior art.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A handheld piston symmetry inspection tool includes an angular positioning seat, characterized in that it also includes an angular positioning block slidably mounted in the angular positioning seat, a V-shaped block mounted on the angular positioning seat, contoured positioning blocks respectively arranged at both ends of the V-shaped block through fixing members, and a dial indicator embedded in the V-shaped block. A sliding groove for the sliding of the angular positioning block is provided in the angular positioning seat, a compression spring is provided in the sliding groove, one end of the compression spring is connected to the inner wall of the sliding groove, and the other end is connected to the side surface of the angular positioning block, and two groups of contact blocks are provided at the front end of the angular positioning block.

[0007] Preferably, a sealing plate is installed on the angular positioning seat to cover the top of the slide groove, and a plurality of mounting holes are also provided on the sealing plate.

[0008] Preferably, the angular positioning seat is provided with a plurality of mounting holes.

[0009] Preferably, the contact is placed between the angles of the V-blocks.

[0010] Preferably, the measuring head of the dial indicator passes through the V-shaped block, and a portion of the measuring head that leaks out of the V-shaped block is placed in the middle of the angular positioning block.

[0011] The beneficial effects of the utility model are as follows: the technical solution can well adapt to the circular structure of the piston through the cooperation of the V-shaped block and the contoured positioning blocks at both ends, realize the precise positioning of the outer diameter of the piston, ensure the accuracy of the detection, and the compression spring and the angular positioning block in the angular positioning seat can automatically level the side wall surface of the piston, further improving the positioning accuracy and laying the foundation for accurate measurement data;

[0012] The operation is relatively simple. You only need to push the V-block into the piston to quickly achieve positioning and leveling. Then, you can read the data through the dial indicator, which greatly improves the detection efficiency. The two side walls of the piston can be inspected at the same time, without the need to adjust the position of the inspection fixture many times, saving detection time.

[0013] The inspection fixture can directly perform in-situ inspection on the piston on the production line without moving the workpiece, thus avoiding the risk of damage caused by moving the workpiece. At the same time, it can achieve real-time inspection, detect problems in time, ensure product quality, and improve production efficiency.

[0014] The V-shaped design allows the inspection tool to be compatible with pistons of different diameters, greatly improving the versatility of the inspection tool, reducing the company's investment cost in inspection equipment, and adapting to the inspection needs of products of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a handheld piston symmetry testing tool of the present utility model;

[0016] Figure 2 This is a side sectional view of a handheld piston symmetry inspection tool of the present invention;

[0017] Figure 3 This is a top view of a piston product of a handheld piston symmetry inspection tool of the utility model;

[0018] Figure 4 This is a schematic diagram of the operating mechanism of a handheld piston symmetry checking tool of the present utility model;

[0019] In the figure: 1. Angular positioning seat; 2. Angular positioning block; 3. V-shaped block; 4. Contour positioning block; 5. Dial indicator; 6. Slide; 7. Compression spring; 8. Closing plate; 21. Contact block; 51. Measuring head. DETAILED DESCRIPTION

[0020] Reference Figures 1 to 4A handheld piston symmetry inspection tool comprises an angular positioning seat 1, an angular positioning block 2 slidably mounted in the angular positioning seat, a V-shaped block 3 mounted on the angular positioning seat, contoured positioning blocks 4 respectively arranged at both ends of the V-shaped block by fixing members, and a dial indicator 5 embedded in the V-shaped block;

[0021] A sliding groove 6 for the sliding of the angular positioning block is provided in the angular positioning seat, and a compression spring 7 is provided in the sliding groove, one end of the compression spring is connected to the inner wall of the sliding groove, and the other end is connected to the side surface of the angular positioning block; the compression spring cooperates with the angular positioning block to achieve automatic reset;

[0022] In order to prevent the angular positioning block from tilting during the sliding process, a sealing plate 8 is installed on the angular positioning seat to cover the top of the slide groove 6. The sealing plate is also provided with a number of mounting holes for mounting with the angular positioning seat and partially for mounting with the V-shaped block.

[0023] In order to cooperate with the installation of the V-block 3, the angular positioning seat 1 is provided with several groups of mounting holes;

[0024] The profiling positioning block 4 can be replaced according to the product model and replaced with a positioning block suitable for product detection;

[0025] In order to effectively cooperate with the side wall of the piston product for positioning, two groups of contact blocks 21 are provided at the front end of the angular positioning block 2, and the contact blocks 21 are placed between the angles of the V-shaped blocks;

[0026] The measuring head 51 of the dial indicator passes through the V-shaped block, and a portion of it leaks out of the V-shaped block and is placed in the middle of the angular positioning block 2.

[0027] This implementation case, refer to Figure 3 , which is a diagram of a product piston. Both sides of the product piston have identical sidewalls, and the overall shape is cylindrical. When the V-block is pushed into the piston, the two contoured positioning blocks on the V-block are in close contact with the piston's outer diameter. The compression spring in the angular positioning seat causes the two contact blocks 21 on the angular positioning block to contact the sidewalls of the workpiece, thereby leveling the sidewalls. Next, use the probe on the dial indicator to contact the sidewalls and read data A. Then, test the other sidewalls in the same manner and read data B. If AB ≤ 0.6, the product is qualified (OK); otherwise, it is unqualified (NG).

[0028] The benefits of the present invention are that the technical solution can well adapt to the circular structure of the piston through the cooperation of the V-shaped block and the contoured positioning blocks at both ends, realize the precise positioning of the outer diameter of the piston, ensure the accuracy of the detection, and the compression spring and the angular positioning block in the angular positioning seat can automatically level the side wall surface of the piston, further improving the positioning accuracy and laying the foundation for accurate measurement data;

[0029] The operation is relatively simple. You only need to push the V-block into the piston to quickly achieve positioning and leveling. Then, you can read the data through the dial indicator, which greatly improves the detection efficiency. The two side walls of the piston can be inspected at the same time, without the need to adjust the position of the inspection fixture many times, saving detection time.

[0030] The inspection fixture can directly perform in-situ inspection on the piston on the production line without moving the workpiece, thus avoiding the risk of damage caused by moving the workpiece. At the same time, it can achieve real-time inspection, detect problems in time, ensure product quality, and improve production efficiency.

[0031] The V-shaped design allows the inspection tool to be compatible with pistons of different diameters, greatly improving the versatility of the inspection tool, reducing the company's investment cost in inspection equipment, and adapting to the inspection needs of products of different specifications.

[0032] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A handheld piston symmetry tester, comprising an angular positioning seat, characterized in that: It also includes an angular positioning block slidably installed in the angular positioning seat, a V-shaped block installed on the angular positioning seat, contoured positioning blocks respectively arranged at both ends of the V-shaped block through fixing parts, and a dial indicator embedded in the V-shaped block. A sliding groove for the sliding of the angular positioning block is opened in the angular positioning seat, a compression spring is arranged in the sliding groove, one end of the compression spring is connected to the inner wall of the sliding groove, and the other end is connected to the side of the angular positioning block, and two groups of contact blocks are provided at the front end of the angular positioning block.

2. The handheld piston symmetry tester according to claim 1, characterized in that: A sealing plate is installed on the angular positioning seat to cover the top of the slide groove, and a plurality of mounting holes are also provided on the sealing plate.

3. The handheld piston symmetry tester according to claim 2, characterized in that: The angular positioning seat is provided with a plurality of mounting holes.

4. The handheld piston symmetry tester according to claim 1, characterized in that: The contact block is placed between the angles of the V-shaped blocks.

5. The handheld piston symmetry tester according to claim 1, characterized in that: The measuring head of the dial indicator passes through the V-shaped block, and a portion of the measuring head leaks out of the V-shaped block and is placed in the middle of the angular positioning block.

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