Gear honing fixture

Abstract

The utility model relates to the technical field of fixture, concretely relates to a tooth honing fixture, including fixture body and workpiece body, one end fixed mounting of fixture body has the outer sleeve frame, the outer sleeve frame inside is provided with pull rod, the inside fixed mounting of fixture body has the locating disc, pull rod with locating disc connection, the inside of locating disc is provided with the limit spring, the limit spring end surface fixedly connected with lower centre, the locating disc with lower centre between is provided with the elastic sleeve, the elastic sleeve can wrap the wheel hub of workpiece body, the utility model can shorten the distance between workpiece gear and fixture clamping position, and then reduce the possibility that the fixture body deviates in the processing, improve the rigidity of tooth honing fixture.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, specifically to a honing clamp. Background Technology

[0002] Honing is a gear finishing technique mainly used to remove oxide scale and burrs from the surface of gear teeth after quenching, improve tooth surface roughness, and enhance gear precision. The principle of honing is similar to that of gear shaving. During machining, the fixture holds the hub of the workpiece, and the workpiece and the honing wheel are similar to a pair of helical gears meshing without backlash. Honing is achieved by utilizing the relative sliding at the meshing point and applying a certain pressure between the tooth surfaces.

[0003] However, after the existing honing fixture completes the clamping of the workpiece, the distance between the workpiece gear and the clamping position of the fixture is relatively long, which makes the workpiece prone to deformation, vibration or displacement under the action of machining force or its own weight, affecting the machining quality of the gear. Summary of the Invention

[0004] In view of the above-mentioned shortcomings in the existing technology, the present invention provides a honing fixture to solve the problem that after the existing honing fixture has completed the clamping of the workpiece, the distance between the workpiece gear and the clamping position of the fixture is too long, which makes the workpiece prone to deformation, vibration or displacement under the action of processing force or its own weight, thus affecting the processing quality of the gear.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A honing fixture includes a fixture body and a workpiece body. An outer frame is fixedly installed at one end of the fixture body. A pull rod is provided inside the outer frame. A positioning plate is fixedly installed inside the fixture body. The pull rod is connected to the positioning plate. The positioning disk is equipped with a limit spring inside, and a lower center is fixedly connected to the end face of the limit spring. An elastic sleeve is provided between the positioning disk and the lower center, and the elastic sleeve can wrap around the hub of the workpiece body.

[0006] In this way, when it is necessary to clamp the workpiece body, the workpiece body is placed inside the fixture body, the pull rod is connected to the hydraulic device, the hydraulic device is turned on, the pull rod is moved, the positioning plate moves along with it, after moving a certain distance, the end of the workpiece body placed inside the fixture body abuts against the lower center, the lower center cooperates with the limit spring to position the workpiece body, and at the same time the elastic sleeve clamps the workpiece body. Similarly, when it is necessary to release the clamping of the workpiece body, the hydraulic equipment is turned on again, which drives the pull rod to move in the opposite direction. The positioning plate moves along with it. After moving a certain distance, the lower center and the limit spring release the positioning of the workpiece body, and at the same time the elastic sleeve releases the workpiece body. The elastic sleeve can wrap around the hub of the workpiece body, and the fixture body and the workpiece body fit more closely during the clamping process. With this structure, the distance between the workpiece gear and the clamping position can be shortened, thereby reducing the possibility of the fixture body shifting during the processing and improving the rigidity of the honing fixture.

[0007] Furthermore, a tailstock tip is provided on one side of the fixture body, and the end face of the tailstock tip abuts against the end of the workpiece body extending outward from the elastic sleeve, thereby enabling the workpiece body to be positioned and improving the stability of the workpiece body during the processing.

[0008] Furthermore, one end of the workpiece body placed inside the elastic sleeve abuts against the lower center, thereby enabling it to cooperate with the tailstock center to position the workpiece body and improve the stability of the workpiece body during processing.

[0009] Furthermore, the tailstock tip and the lower tip are located on the same straight line, the centers of the tailstock tip and the lower tip are located on the same straight line, and the end of the lower tip is tapered.

[0010] In this way, the tailstock center and the lower center are aligned on the same straight line, and their centers are also aligned on the same straight line. This ensures precise positioning of the workpiece within the fixture body. The tapered end of the lower center allows it to make close contact with the workpiece surface, providing uniform clamping force. This structure reduces the possibility of deformation or displacement of the workpiece due to uneven force during machining, thereby improving the machining accuracy of the workpiece. Furthermore, the clamp body and the outer frame are fixedly connected by connecting bolts, which can strengthen the connection between the clamp body and the outer frame and improve the stability of the clamp body and the outer frame during the clamping process. Attached Figure Description

[0011] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of the honing clamp of this utility model; Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of the honing clamp of this utility model; Figure 3 This is a cross-sectional view of the workpiece body in an embodiment of a honing fixture of this utility model; Reference numerals in the accompanying drawings: Fixture body 1, outer frame 101, pull rod 102, positioning plate 103, limit spring 104, lower center 105, elastic sleeve 106; Workpiece body 2; Tailstock tip 3; 4 connecting bolts. Detailed Implementation

[0012] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0013] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0014] Example: like Figures 1-3 As shown, the honing fixture of this utility model includes a fixture body 1, a workpiece body 2, and a tailstock center 3. An outer frame 101 is fixedly installed at one end of the fixture body 1. Specifically, the fixture body 1 and the outer frame 101 are fixedly connected by connecting bolts 4. A pull rod 102 is provided inside the outer frame 101. A positioning plate 103 is fixedly installed inside the fixture body 1. The pull rod 102 is connected to the positioning plate 103. A limit spring 104 is provided inside the positioning plate 103. A lower center 105 is fixedly connected to the end face of the limit spring 104. An elastic sleeve 106 is provided between the positioning plate 103 and the lower center 105. The workpiece body 2 is located inside the elastic sleeve 106.

[0015] The end of the workpiece body 2 extending out of the elastic sleeve 106 abuts against the end face of the tailstock tip 3. The end of the workpiece body 2 placed inside the elastic sleeve 106 abuts against the lower tip 105. The tailstock tip 3 and the lower tip 105 are on the same straight line. The centers of the tailstock tip 3 and the lower tip 105 are on the same straight line. The end of the lower tip 105 is tapered.

[0016] The elastic sleeve 106 can wrap around the hub of the workpiece body 2. Specifically, before optimization, the distance from the gear of the workpiece body 2 to the fixture body 1 was 152.65 mm, and after optimization, the distance from the gear of the workpiece body 2 to the fixture body 1 was 92.65 mm, a reduction of 60 mm. After analyzing the gears before and after optimization using professional gear measurement and analysis software, the results are shown in the table below:

[0017] Table 1: Tooth direction V value of the gear before optimization

[0018] Table 2: Tooth direction V value of the optimized machined gear By analyzing the data in the table, we can see that after optimization: 1. It can reduce the possibility of local contact stress concentration on the tooth surface during meshing, thereby reducing the possibility of excessive local wear caused by tooth profile tilting; 2. It can improve transmission smoothness and reduce impact and noise during meshing; 3. The load distribution in the tooth width direction is more uniform during meshing, reducing the possibility of premature tooth surface failure due to excessive local stress; 4. The load can be evenly distributed across the entire tooth width, improving the gear's load-bearing capacity.

[0019] Simultaneously, analysis of the test data revealed that before optimizing the fixture clamping position, 7772 out of 9625 honing pieces were qualified, resulting in a qualification rate of 80.75%. After optimizing the fixture clamping position, 2 out of 128 honing pieces were found to have large tooth direction V values, while the rest were qualified, resulting in a qualification rate of 98.4%. This demonstrates that optimizing the fixture clamping position significantly improved the qualification rate of honing.

[0020] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A honing clamp, characterized in that, The fixture includes a fixture body (1) and a workpiece body (2). One end of the fixture body (1) is fixedly mounted with an outer frame (101). A pull rod (102) is provided inside the outer frame (101). A positioning plate (103) is fixedly mounted inside the fixture body (1). The pull rod (102) is connected to the positioning plate (103). The positioning disk (103) is provided with a limiting spring (104) inside. The end face of the limiting spring (104) is fixedly connected to a lower center (105). An elastic sleeve (106) is provided between the positioning disk (103) and the lower center (105). The elastic sleeve (106) can wrap around the hub of the workpiece body (2).

2. The honing clamp as described in claim 1, characterized in that: The fixture body (1) is provided with a tailstock tip (3) on one side, and the end face of the tailstock tip (3) abuts against the end of the workpiece body (2) extending out of the elastic sleeve (106).

3. A honing clamp as described in claim 2, characterized in that: The end of the workpiece body (2) placed inside the elastic sleeve (106) abuts against the lower center point (105).

4. A honing clamp as described in claim 3, characterized in that: The tailstock tip (3) and the lower tip (105) are located on the same straight line, the centers of the tailstock tip (3) and the lower tip (105) are located on the same straight line, and the end of the lower tip (105) is tapered.

5. A honing clamp as described in claim 4, characterized in that: The clamp body (1) and the outer frame (101) are fixedly connected by connecting bolts (4).

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