Clamp for detection and sample preparation of heat-treated steel balls

Abstract

The utility model belongs to the field of steel ball detection and sample preparation, and particularly relates to a clamp for heat treatment steel ball detection and sample preparation, which comprises a top shaft, a cap ring and a top sheet, the upper portion of the periphery of the top shaft is smooth, the lower portion of the periphery of the top shaft is provided with threads, a through hole is formed in the cap ring, the top piece is installed in the through hole, one side of the through hole is provided with internal threads matched with the threaded section of the top shaft, and the other side of the through hole is provided with a boss structure used for limiting the top piece. At least one mounting hole for clamping the steel balls is formed in the end face of the top piece. The steel ball sample preparation device can be used for batch sample preparation of the steel balls with the same size, so that the working efficiency is improved, the sample preparation parallelism error is reduced, and the safety risk and the production cost are reduced.

Description

Technical Field

[0001] The utility model belongs to the field of steel ball detection and sample preparation, in particular to a clamp used for heat treatment steel ball detection and sample preparation. Background Art

[0002] During the heat treatment inspection of steel balls, hot working inspectors are required to manually grind and polish the quenched and tempered steel balls to prepare samples before hardness testing and metallographic structure determination can be performed. Small-sized steel balls need to be mounted using a mounting machine and then ground and polished. Medium and large-sized steel balls require manual grinding and polishing, and only one steel ball can be ground and polished at a time. In particular, regarding hardness testing, the "Bearing Parts Heat Treatment Standard" stipulates that the hardness test surface should be flat and smooth, and the parallelism error reference value for steel balls with a diameter of 8mm to 30mm should be within 20-40μm. This requires grinding the steel balls into two parallel surfaces to meet the testing requirements, and then testing them using a Rockwell hardness tester or Vickers hardness tester.

[0003] The current sampling method requires hot work inspectors to manually hold steel balls to prepare samples, and only one steel ball can be sampled at a time. This method requires a high level of skill and experience from the hot work inspector, is inefficient, wastes materials, and can easily cause uneven steel ball samples and excessive parallelism errors, affecting inspection efficiency and accuracy. Therefore, a low-cost, safe, and easy-to-use sampling device is needed that can grind and polish multiple steel balls simultaneously to reduce production costs and improve sampling efficiency and accuracy. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a fixture for testing and preparing samples of heat-treated steel balls.

[0005] The technical solution adopted by the utility model is: a fixture for testing and preparing samples of heat-treated steel balls, comprising a top shaft, a cap ring, and a top plate; the upper portion of the outer periphery of the top shaft is smooth, and the lower portion is provided with a thread; the cap ring is provided with a through hole, and the top plate is installed in the through hole; one side of the through hole is provided with an internal thread that matches the threaded section of the top shaft, and the other side of the through hole is provided with a boss structure for limiting the top plate, and at least one mounting hole for clamping a steel ball is provided on the end surface of the top plate.

[0006] As a preferred solution, the length of the threaded section of the top shaft can be adjusted according to different testing requirements.

[0007] As a preferred solution, the top sheet has various sizes.

[0008] As a preferred solution, the mounting hole is funnel-shaped.

[0009] As a preferred solution, the outer peripheral surface of the cap ring is provided with evenly distributed protrusions.

[0010] As a preferred solution, the top shaft, cap ring and top sheet are made of stainless steel.

[0011] Based on the defects of the existing technology, this solution provides a fixture for testing and preparing samples of heat-treated steel balls. By optimizing the structural design, this solution has the following technical effects:

[0012] First, this solution connects the fixture top shaft and the fixture cap ring of the device, and cooperates with fixture top plates of different sizes to batch prepare samples of steel balls of the same size, thereby improving work efficiency, reducing the parallelism error of sample preparation, and correspondingly reducing consumables. It is applicable to steel balls of φ8㎜-φ30㎜, and the parallelism error can be controlled within 10-30μm, meeting the sample preparation standard requirements.

[0013] Secondly, after grinding one side, the positioning of the other side is accurate and simple. When grasping the parallelism of the sample, it is only necessary to observe whether the protruding part of the steel ball is ground flush with the top plate to meet the parallelism requirement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 、 Figure 3 、 Figure 4 Schematic diagram of the structure of top sheets of different specifications;

[0017] Markings in the figure: 1, top shaft, 2, cap ring, 3, top plate, 4, mounting hole. DETAILED DESCRIPTION

[0018] The utility model is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0019] It should be noted that: unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "one", "an" or "the" and the like used in the specification and claims of the present utility model patent application do not express quantity restrictions, but rather indicate the presence of at least one; the words "first", "second" and "third" used herein shall not be regarded as restrictions on the order of components, but merely serve to distinguish different components; words such as "include" or "comprise" indicate that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, but do not exclude other elements or objects with the same function. Example

[0020] In order to more clearly describe the specific structural composition of the heat-treated steel ball detection sample preparation fixture, this embodiment is described in conjunction with the accompanying drawings:

[0021] A fixture for testing and preparing samples of heat-treated steel balls comprises a top shaft 1, a cap ring 2, and a top plate 3; the top shaft 1 has a smooth upper outer periphery and a threaded lower portion, the cap ring 2 is provided with a through hole, the top plate 3 is installed in the through hole, one side of the through hole is provided with an internal thread that cooperates with the threaded section of the top shaft 1, and the other side of the through hole is provided with a boss structure for limiting the top plate 3, and at least one mounting hole 4 for clamping a steel ball is provided on the end face of the top plate 3.

[0022] In this embodiment, the length of the threaded section of the top shaft 1 can be adjusted according to different testing requirements. The top shaft 1, the cap ring 2, and the top plate 3 are made of stainless steel.

[0023] The top sheet 3 has various sizes to accommodate steel balls of different sizes. The mounting holes 4 on the top sheet have various sizes and numbers. The top sheet 3 can be manufactured according to actual processing conditions. Only a few of them are provided in the drawings.

[0024] The mounting hole 4 is funnel-shaped, and its design of being wide at the top and narrow at the bottom can better clamp the steel ball.

[0025] The protrusions evenly distributed on the outer peripheral surface of the cap ring 2 increase the friction with the hand, making it easier to hold, improving the operational stability and making the operation safer.

[0026] like Figure 1As shown, during the specific operation, according to the size of the steel ball, a suitable top plate 3 is selected, the steel ball is first placed in the mounting hole of the top plate, and then the top plate 3 is placed on the boss of the cap ring 2, and finally the cap ring 2 is matched with the top shaft 1, and the top plate 3 is tightened to ensure that the steel ball is clamped and tightened; the tightened device is placed on a metallographic polishing machine for sample preparation, and the protruding part of the steel ball is ground flush with the top plate. After processing one side, the fixture is disassembled, the steel ball is reversed and then rotated and tightened, and the sample preparation is continued. After the sample preparation is completed, a waist drum-shaped steel ball with two sides approximately parallel is obtained, which can be used for hardness testing. The steel ball is then polished into a mirror surface through subsequent polishing, and can be used for metallographic corrosion testing.

[0027] Parts not described in detail in this embodiment are prior art.

[0028] It should be noted that although the present invention has been described through the above embodiments, the present invention may also have other various embodiments. Without departing from the spirit and scope of the present invention, it is obvious that those skilled in the art may make various corresponding changes and modifications to the present invention, and such changes and modifications shall fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A fixture for testing and preparing samples of heat-treated steel balls, characterized by: It includes a top shaft, a cap ring, and a top plate; the upper part of the outer periphery of the top shaft is smooth, and the lower part is provided with a thread; the cap ring is provided with a through hole, and the top plate is installed in the through hole; one side of the through hole is provided with an internal thread that matches the threaded section of the top shaft, and the other side of the through hole is provided with a boss structure for limiting the top plate, and at least one mounting hole for clamping a steel ball is provided on the end face of the top plate.

2. A fixture for testing and preparing samples of heat-treated steel balls according to claim 1, characterized in that: The length of the threaded section of the top shaft can be adjusted according to different testing requirements.

3. The fixture for testing and preparing samples of heat-treated steel balls according to claim 1, characterized in that: The top sheet has various sizes.

4. The fixture for testing and preparing samples of heat-treated steel balls according to claim 1, characterized in that: The mounting hole is funnel-shaped.

5. The fixture for testing and preparing samples of heat-treated steel balls according to claim 1, characterized in that: The outer peripheral surface of the cap ring is provided with evenly distributed protrusions.

6. The fixture for testing and preparing samples of heat-treated steel balls according to claim 1, characterized in that: The top shaft, cap ring and top sheet are made of stainless steel.

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