Meter table tool for measuring circular run-out of reference end face of large roller

Abstract

The utility model belongs to the technical field of bearing roller measurement, and particularly relates to a table tool for measuring large roller reference end face circle run-out. The meter table tool is provided with a v-shaped block for supporting a roller; the v-shaped block is of a cuboid structure; the V-shaped block is provided with a V-shaped groove with a V-shaped cross section; the bottom face of the V-shaped groove is provided with a rectangular groove formed in the width direction of the V-shaped block. A supporting block used for supporting the roller is installed on the side wall face of the V-shaped groove. Steel balls capable of rotating relative to the supporting blocks are arranged at the tops of the supporting blocks; the supporting block supports the roller through the steel ball; the multiple supporting blocks are evenly distributed along the circumference, and the rollers on the multiple supporting blocks jointly form a supporting mechanism used for conducting point supporting on the supporting blocks. According to the utility model, the linear contact between the roller and the v-shaped block is changed into the point contact between the roller and the steel ball, so that the contact area is reduced, the friction force is reduced, the roller is more convenient and labor-saving to rotate, and meanwhile, the abrasion can be reduced; and the service life is further prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing roller measurement, in particular to a table tool for measuring the circular runout of a reference end face of a large roller. Background Art

[0002] In the design of high-end bearings, more and more people use the combination of roller ball base surface and rib to reduce sliding friction and improve lubrication. The shape accuracy (shape, SR) and position accuracy SDw (reference end face circular runout) of the roller ball base surface determine the contact state between the roller and the ring rib, the stability of rotation and revolution around the bearing axis. The consistency of the processing values ​​of the ball base surface curvature radius and roller length, the smaller roughness value, the end face circular runout value and other indicators are the technical requirements of high-precision rollers, and also directly affect the state of the roller in the bearing operation. Therefore, the processing and inspection of the roller ball base surface are particularly important in the bearing roller industry. It is important; in the ball base surface grinding process, the ball base surface reference end face circular runout is an important technical requirement. End face circular runout refers to the difference between the maximum and minimum values ​​measured by a fixed indicator in a given measuring direction during the process of the actual measured element rotating around the reference axis without axial movement. The value of the end face circular runout is directly related to the working stability. Excessive end face circular runout will reduce the bearing accuracy, thereby affecting the working accuracy of the entire shaft system, and will also aggravate the wear of the bearing ribs and reduce the bearing life. It will also affect the working efficiency and lead to reduced bearing working efficiency.

[0003] The existing table for measuring the circular runout of the reference end face of the roller is mainly composed of a V-block, a side support and a sector table. When in use, the roller to be measured needs to be placed on the V-block so that it contacts the stylus 3mm away from the roller chamfer (if there are special requirements, it shall be carried out in accordance with the process requirements), and then the roller is rotated evenly. Half of the maximum difference shown by the pointer is the end face circular runout (this method is the diameter method measurement); when measuring large rollers, due to the large size and heavy weight of the rollers, the contact area between the rollers and the V-blocks is large, and the rollers are not easy to rotate on the V-blocks; it is inconvenient for the operator to rotate the rollers evenly during measurement, which will affect the measurement accuracy, increase the measurement time, and indirectly affect the production efficiency. Therefore, an optimization method is needed to solve this problem. Summary of the Invention

[0004] The utility model aims to provide a table fixture for measuring the circular runout of a large roller reference end face, which can reduce the difficulty of rotating the roller when measuring the circular runout of the reference end face and improve the measurement accuracy and efficiency.

[0005] The present invention adopts the following technical solutions to achieve the above-mentioned purpose:

[0006] A table fixture for measuring the circular runout of the reference end face of a large roller, the table fixture having a V-shaped block for supporting the roller; the V-shaped block is a rectangular parallelepiped structure; the V-shaped block has a V-shaped groove with a V-shaped cross-section; the bottom surface of the V-shaped groove has a rectangular groove arranged along the width direction of the V-shaped block; a support block for supporting the roller is installed on the side wall surface of the V-shaped groove; the top of the support block has a steel ball that can rotate relative to the support block; the support block supports the roller through the steel ball; there are multiple support blocks evenly distributed along the circumference, and the rollers on the multiple support blocks together constitute a support mechanism for point support of the support block.

[0007] The support block has a support base that fits the side wall surface of the V-shaped groove; the middle part of the support base has a groove for embedding the steel column.

[0008] The utility model proposes a table tool for measuring the circular runout of the reference end face of a large roller. By improving and optimizing the existing table structure, the line contact between the roller and the V-block is changed to the point contact between the roller and the steel ball, the contact area is reduced, thereby reducing the friction, making it more convenient and labor-saving to rotate the roller, and also reducing wear; at the same time, due to the reduced contact area of ​​the new structure, the wear of the V-block is greatly reduced, thereby extending the service life; if replacement is necessary, the steel ball can be replaced without replacing the entire V-block; in terms of measurement, the measurement difficulty is reduced and the measurement efficiency can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the present utility model.

[0010] Figure 2 This is a schematic structural diagram of the support block in the present invention.

[0011] In the picture: 1. Roller, 2. Steel ball, 3. V-block. DETAILED DESCRIPTION

[0012] The following is a further description of the specific embodiments of the present invention with reference to the accompanying drawings:

[0013] like Figure 1As shown, a table fixture for measuring the circular runout of the reference end face of a large roller, the table fixture has a V-shaped block 3 for supporting the roller; the V-shaped block 3 is a rectangular parallelepiped structure; the V-shaped block 3 has a V-shaped groove with a V-shaped cross-section; the bottom surface of the V-shaped groove has a rectangular groove arranged along the width direction of the V-shaped block; a support block for supporting the roller is installed on the side wall surface of the V-shaped groove 3; the top of the support block has a steel ball 2 that can rotate relative to the support block; the support block supports the roller 1 through the steel ball; the support blocks are multiple and evenly distributed along the circumference, and the rollers on the multiple support blocks together constitute a support mechanism for point support of the support block.

[0014] The support block has a support base that fits the side wall surface of the V-shaped groove; the middle part of the support base has a groove for embedding the steel column.

[0015] During measurement, the roller to be measured is placed on the V-block, the roller is in direct contact with the steel ball, and the end face of the roller is in contact with the measuring table and the measuring support respectively at a distance of 3mm from the chamfer. Then the roller is rotated evenly to achieve measurement. The holes on both sides of the steel ball are only used for connection with the V-block and do not need to be made into threaded holes. If they are worn during use and need to be replaced, they can be directly removed for replacement without replacing the entire V-block.

Claims

1. A table fixture for measuring the circular runout of a large roller reference end face, the table fixture comprising a V-shaped block for supporting the roller; the V-shaped block is a rectangular parallelepiped structure; the V-shaped block has a V-shaped groove with a V-shaped cross-section; the bottom surface of the V-shaped groove has a rectangular groove arranged along the width direction of the V-shaped block; the characteristics are: A support block for supporting the roller is installed on the side wall surface of the V-shaped groove; the top of the support block has a steel ball that can rotate relative to the support block; the support block supports the roller through the steel ball; the support blocks are multiple and evenly distributed along the circumference, and the rollers on the multiple support blocks together constitute a support mechanism for point support of the support block.

2. A table fixture for measuring the circular runout of a large roller reference end face according to claim 1, characterized in that: The support block has a support base that fits the side wall surface of the V-shaped groove; the middle part of the support base has a groove for embedding the steel column.

Images