Bearing special measuring tool

In order to ensure product quality and improve inspection efficiency, a large number of special measuring tools are used in the whole process of inspecting the bearings. Among them, the most used ones are special standard parts.

1. Common standard parts
At present, the standard parts used in each bearing factory are of different origins. The factory with conditions is manufactured by the machine repair (tool) workshop of the factory, and only some standard parts such as groove diameter standard parts are selected from the production parts. In addition to outsourcing or self-made parts, factories that do not have the conditions are selected from the production parts. In general, the precision of the specially manufactured standard parts is high, and the precision selected from the production parts as the standard parts is lower, but as long as the reasonable and correct selection, the quality requirements of the bearing parts products can be guaranteed. The selection of measuring tools is the task of measurement. They regularly and regularly check the performance of the measuring tools. As the user, the measuring tools and the instrument usage system must be strictly observed.

In addition to the reference parts of the measuring room, the standard parts used by our company in the production workshop are basically selected from the production parts. After passing the verification of the measuring room according to the technical conditions, they can be used as standard parts. At the time of the inspection, the manufacturing part is marked with the manufacturing size and number of the standard part. The actual size of the standard part is based on the standard part of the issued standard part verification card. In addition, the "|" mark on the outer diameter or end face of the standard part is indicated, which indicates the position of the measuring point of the standard part, so the tip of the meter (or the fulcrum corresponding to the tip) must be placed when the table is adjusted. On the "|" mark.

1) Width standard parts
    The width standard is used to verify the width of the inner and outer rings of the bearing. The width standard is matched with the G903 series of measuring instruments and instruments to measure the width of the ferrule. No damage, burrs, etc. are allowed on the working surface of the standard parts. There are bumps and burrs on a working surface, which must be re-checked to avoid measurement errors.

2) Inner diameter and outer diameter standard parts
The inner and outer diameter standard parts are used to inspect the bearing inner diameter and outer diameter dimensions, respectively. The inner diameter and outer diameter of the bearing are the main dimensions of the bearing and are one of the important items that determine the quality of the bearing. Therefore, the verification of the inner and outer diameter standard parts must be accurate.

The inner diameter standard is matched with the D923 series inner diameter measuring instrument and instrument to measure the inner diameter, the inner diameter variation in a single radial plane, and the inner ring reference end to the inner diameter. The outer diameter standard is matched with the D913 series outer diameter measuring instrument and instrument to measure the outer diameter size, the outer diameter variation in a single radial plane, and the variation of the outer diameter surface busbar to the reference end surface inclination.

3) Ditch diameter standard parts
The inner groove diameter and the outer groove diameter standard are used to inspect the inner and outer ring channel diameters of the bearing, respectively. The groove diameter, groove curvature, groove symmetry, and single radial in-plane groove diameter change are selected from the product. Items such as quantity must be qualified. The channel standard parts are divided into inner and outer groove standard parts.

The inner channel standard is matched with the D022 series internal groove measuring instrument and instrument. It can be used to measure the diameter of the inner ring channel and the variation of the inner channel diameter in a single radial plane. The outer channel standard is matched with the D012 series outer groove measuring instrument and instrument, and can be used to measure the outer ring channel diameter size, the variation of the inner and outer channel diameters in a single radial plane, and the like.

4) Clearance and vibration standard parts
The clearance and vibration standard are used to check the clearance and vibration of the bearing, respectively, and are selected from the product. The clearance standard is matched with the X092 series radial clearance gauge and instrument to measure the radial clearance of the bearing. The vibration standard is matched with the S0910 or BVT-1 vibration measuring instrument to measure the vibration acceleration (or speed) level of the bearing.