The outer race width measuring instrument of cylindrical roller bearing measures the outer race width of cylindrical roller bearing

Abstract: with the structure of two groups of double parallel equidistant spring plates, a measuring instrument for the outer race width of cylindrical roller bearing is designed, and the measuring principle is introduced, so as to achieve the purpose of quantitatively measuring the outer race width of cylindrical roller bearing.

Key words: cylindrical roller bearing; Retaining edge; Raceway; Width; Measuring instrument

In the processing of cylindrical roller bearings, it is generally required that the tolerance values of the position H of the raceway edge to the reference end face and the raceway width dimension L should be controlled within 0.04 mm. Therefore, it is required to check H and L during the manufacturing process. At present, there is no inspection instrument for this project in China. At first, only the sample plate can be used for qualitative inspection, and the specific values of H and L dimensions can not be detected. Therefore, a measuring instrument for the outer race width of cylindrical roller bearing is developed, which is described below.

1 Basic structure of the instrument

This instrument is a mechanical instrument using comparative measurement method, as shown in Fig. 1. The basic structure is as follows: the first group of parallel spring plates and the second group of parallel spring plates are fixed on the base in the form of parallel equidistance and inclined by 10 °, the upper end of the parallel spring plate group I supports the right floating plate, the upper end of the parallel spring plate group II supports the left floating plate, the right end of the right floating plate is connected to the right measuring point for measuring L, the left lower part of the right floating plate is equipped with a fine adjustment screw, and the right end of the left floating plate is connected to the left measuring point for measuring H, The left end of the left floating plate is equipped with a fine adjustment screw and a measuring instrument II bracket. The measuring instrument I bracket is installed on the base. The meter tip of the measuring instrument I is hit on the fine adjustment screw, the meter tip of the measuring instrument II is hit on one end of the measuring lever, and the other end of the measuring lever is hit on the fine adjustment screw. In order to avoid damaging the measuring instrument, a limit screw is installed on the measuring lever. Pull the pressure bar to make the V-shaped fork claw move downward in the guide sleeve. The V-shaped fork claw drives the two contacts in contact with the V-shaped fork claw to retract inward, that is, the right measuring point linked with the contact point retracts to the left, and the left measuring point linked with the contact point retracts to the right, which is convenient for placing and taking the measured ferrule.

1 - fine adjustment screw; 2-v-shaped fork claw; 3 - spring; 4 - base; 5 - workbench; 6-v-shaped positioning fulcrum; 7 - tested ferrule; 8 - right measuring point; 9 - left measuring point; 10 - bearing positioning fulcrum; 11 - right floating plate; 12 - parallel spring plate group I; 13 - left floating plate; 14 - parallel spring plate group II; 15 - pressure bar; 18 - instrument I support; 19 - instrument II support; 20 - guide sleeve; 21 - lever; 22 - limit screw

Fig. 1 structure diagram of measuring instrument for outer race width of cylindrical roller bearing

2 Design of spring plate group

2.1 parallel equidistant spring plate group

The design of the spring plate group uses the principle of parallel four-bar mechanism in the mechanical principle, that is, the floating plate hinged on the upper end of the parallel equidistant spring plate group and the running track of the parts connected with the floating plate are the same. Therefore, the respective displacement changes of the right probe and the left probe in the measured bearing outer race flange can be transmitted to the instrument I and II through the fine adjustment screws on the instrument bracket under the left and right floating plates.

2.2 differential parallel spring plate group

The meter bracket of measuring instrument I is installed on the base, and the meter tip is hit on the fine adjustment screw integrated with the left floating plate. The measured value displayed by measuring instrument I is the position change H value of the left measuring point on the raceway edge to the reference end face. Since the measuring instrument II is stuck on the instrument support integrated with the left floating plate, the meter tip is hit at one end of the measuring lever, and the fine adjustment screw integrated with the right floating plate is hit at the other end of the measuring lever, the influence of the position change of the edge to the reference end face on the raceway width is eliminated. To be exact, the measured value reflected by the measuring instrument II is the algebraic sum of the change of the position of the left measuring point to the track edge and the change of the width of the right measuring point to the track edge, that is, the differential change of the right measuring point to the left measuring point.

3 Instrument adjustment

First, place the measured bearing outer ring on the adjusted V-shaped positioning fulcrum, and make the reference end face lean against the bearing positioning fulcrum for positioning. According to the position and width of the measured bearing outer ring raceway, adjust the left and right measuring points to appropriate positions, so that the two measuring points are exactly in the middle of the two stops of the raceway, and paint red dye on the two stops of the raceway, Ensure that the two measuring points are in good contact with the edge of the raceway by scraping red. Adjust the limit screws on the left and right floating plates to ensure that the two groups of parallel spring plates drive the left and right measuring points to have appropriate free movement space, and make sure that the measuring head has enough return space and can accurately measure the parameter values when the size of the raceway changes. When using standard parts to align the gauge, adjust the fine adjustment screw so that the gauge I and gauge II respectively reflect the dimensional tolerance value marked by the standard parts.

4 Use of instruments

During measurement, adjust the positions of the two measuring points on the left and right floating plates according to the position and width of the raceway of the outer ring of the measured bearing, so that the two measuring points are exactly in the middle of the two retaining edges of the raceway after the measured ferrule is placed. Pull the pressure bar by hand to move the V-shaped fork claw downward, and drive the two measuring points inward when moving downward, and then place the measured ferrule on the adjusted V-shaped positioning fulcrum, Make the reference end face of the measured ferrule abut on the bearing positioning fulcrum. After the measured ferrule is placed, loosen the trigger lever. Under the elastic force of the spring, the left and right measuring points are respectively hit on the two stop edges of the raceway of the measured ferrule. Rotate the outer ring of the measured bearing on the V-shaped guide surface of the V-shaped positioning fulcrum for more than one circle. At this time, the measured value displayed by the measuring instrument I is the position change h of the raceway stop edge of the left measuring point to the reference end face, And the measured value displayed by instrument II is the width dimension L of the outer race of the tested bearing. Adjust the fine adjustment screw when using the standard part to align the gauge, so that the measuring instrument I and the measuring instrument II respectively reflect the dimensional tolerance value marked on the standard part.

More about ITS Cylindrical Roller Bearing：

ITS cylindrical roller bearing top quality brand has guaranteed production and highly active management.

The cylindrical roller bearings have a high radial load capacity and are suitable for high speeds. They are in linear contact with the raceways. They are designed to be reliable and a good fit for the environment. The bearing is highly versatile and can be used for many applications.

Cylindrical roller bearings are also available in sealed or split designs. In sealed bearings, the rollers are protected from contaminants, water and dust, while providing lubricant retention and contaminant exclusion. This provides lower friction and longer service life.