CN-121632054-B - Bearing contact angle detection method

CN121632054BCN 121632054 BCN121632054 BCN 121632054BCN-121632054-B

Abstract

The invention belongs to the technical field of detection of rolling bearings, and particularly discloses a bearing contact angle detection method which comprises a bearing, an auxiliary cylinder P and an auxiliary cylinder Q, wherein the bearing contact angle detection method comprises the following steps of (1) pasting the auxiliary cylinder, namely pasting the auxiliary cylinder P on the upper end face of an outer ring of the bearing, and pasting the auxiliary cylinder Q on the upper end face of a retainer of the bearing; the method comprises the steps of (2) collecting measuring points before bearing rotation, step (3) rotating the bearing outer ring anticlockwise, step (4) collecting measuring points after bearing rotation, step (5) calculating a bearing contact angle alpha through a formula, and the method uses a three-coordinate measuring machine to collect coordinates of the bearing outer ring and an auxiliary cylinder on a retainer before and after bearing rotation and output related parameters, and the measured bearing contact angle is obtained through calculation, so that the problem that part of bearing contact angles cannot be accurately measured is solved.

Inventors

YU HAIBO
ZHANG SHUAIJUN
Niu Baodie
KANG YANHUI
XIE XINGHUI
GENG TAO
Liang Shucong
YANG WENLONG
WANG HAIFAN
WANG DIANREN

Assignees

洛阳轴承集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260205

Claims (2)

1. The bearing contact angle detection method comprises a bearing (1), an auxiliary cylinder P (2) and an auxiliary cylinder Q (3) and is characterized by comprising the following steps of: the step (1) is to paste an auxiliary cylinder, namely, paste an auxiliary cylinder P (2) on the upper end face of the outer ring of the bearing (1), and paste an auxiliary cylinder Q (3) on the upper end face of the retainer of the bearing (1); the method comprises the following steps of (2) collecting measuring points before rotation of a bearing (1), wherein the step (2) comprises the following steps: Collecting the circle center of the inner ring of the bearing (1), namely collecting the circle center of the inner ring of the bearing (1) by using a three-coordinate measuring machine, wherein the position of the circle center is O; Collecting the center position of the auxiliary cylinder P (2), namely collecting the center of the auxiliary cylinder P (2) by using a three-coordinate measuring machine, wherein the position of the center is A; collecting the center position of an auxiliary cylinder Q (3), namely collecting the center of the auxiliary cylinder Q (3) by using a three-coordinate measuring machine, wherein the position of the center is B; Step (24), making a measurement auxiliary line, namely respectively connecting two straight lines OA and OB in a three-coordinate measuring machine to be used as the measurement auxiliary line; step (3), rotating the outer ring of the bearing (1) anticlockwise; the method comprises the following steps of (4) collecting measuring points after bearing rotation, wherein the step (4) comprises the following steps: collecting the center position of the rotated auxiliary cylinder P (2), namely collecting the center of the rotated auxiliary cylinder P (2) by using a three-coordinate measuring machine, wherein the position of the center is A'; Collecting the center position of the rotated auxiliary cylinder Q (3), namely collecting the center of the rotated auxiliary cylinder Q (3) by using a three-coordinate measuring machine, wherein the position of the center is B'; Step (43) of making a measurement auxiliary line, namely respectively connecting two straight lines OA 'and OB' in a three-coordinate measuring machine to be used as the measurement auxiliary line; and (5) calculating a bearing contact angle alpha through a formula, wherein the step (5) comprises the following steps: measuring an included angle, namely setting the included angle between OA and OA 'as gamma and measuring gamma in a three-coordinate measuring machine, setting the included angle between OB and OB' as beta and measuring beta; and (52) calculating the total rotation radian from the circle center A to the circle center A' after rotating n e circles according to the following formula: ; Step (53), calculating the total rotation radian from the circle center B to the circle center B' after rotating the circle center B for n c circles according to the following formula: ; Step (54) of calculating the bearing contact angle alpha by the following formula: ; Wherein D pw is the pitch diameter of the ball group, and D w is the nominal diameter of the ball.
2. The method for detecting the contact angle of the bearing according to claim 1, wherein in the step (3), in the process of rotating the outer ring of the bearing (1), an auxiliary cylinder P (2) adhered to the outer ring of the bearing (1) rotates anticlockwise along with the outer ring of the bearing (1), the circle center of the auxiliary cylinder P (2) rotates from a point A for n e circles and then rotates to a position A ', the retainer rotates anticlockwise along with the rotation of the outer ring of the bearing (1), and the circle center of the auxiliary cylinder Q (3) rotates from a point B for n c circles and then rotates to a position B'.

Description

Bearing contact angle detection method Technical Field The invention belongs to the technical field of detection of rolling bearings, and particularly relates to a bearing contact angle detection method. Background The contact angle of a rolling bearing is a key parameter in the design of the rolling bearing, and directly influences the carrying capacity, friction characteristics and service life of the bearing, and in short, the size of the contact angle has a significant influence on the performance of the bearing. The contact angle is the angle between the normal line of the contact points of the rolling bodies of the bearing and the inner and outer ring raceways and the radial plane of the bearing, the size of the angle determines the capacity distribution of the bearing when bearing radial load and axial load, in addition, the contact angle is closely related to the friction characteristic of the bearing, the larger contact angle generally leads to higher friction coefficient, which can affect the running efficiency and energy consumption of the bearing, and therefore, when designing the bearing, a balance point needs to be found among the bearing capacity, the friction characteristic and the service life to select the most suitable contact angle. At present, the contact angle of the bearing is mainly measured by a contact angle measuring instrument and a manual protractor, when the contact angle measuring instrument is used for measuring, the size range of the measurable bearing is smaller due to the size limitation of the instrument, the contact angles of most thin-wall bearings, large-scale bearings and extra-large bearings cannot be detected by the contact angle measuring instrument, and when the manual protractor is used for measuring, the contact angle measuring instrument is greatly influenced by external environment and human factors, and the measuring precision cannot be ensured. Based on the above, it is necessary to design a detection method capable of measuring a bearing contact angle in a wider size range while ensuring the measurement accuracy, so as to effectively evaluate the processing quality of the product and meet the requirements of the product design and the use performance of the bearing by the user. Disclosure of Invention Aiming at the problems in the background technology, the invention provides a bearing contact angle detection method. In order to achieve the purpose, the invention adopts the following technical scheme that the bearing contact angle detection method comprises a bearing, an auxiliary cylinder P and an auxiliary cylinder Q, and comprises the following steps: the step (1) of pasting an auxiliary cylinder, namely pasting an auxiliary cylinder P on the upper end face of an outer ring of a bearing, and pasting an auxiliary cylinder Q on the upper end face of a retainer of the bearing; The method comprises the following steps of (2) collecting measuring points before bearing rotation, wherein the step (2) comprises the following steps: Collecting the circle center of the inner ring of the bearing by using a three-coordinate measuring machine, wherein the position of the circle center is O; Collecting the center position of the auxiliary cylinder P, namely collecting the center of the auxiliary cylinder P by using a three-coordinate measuring machine, wherein the position of the center is A; collecting the center position of the auxiliary cylinder Q, namely collecting the center of the auxiliary cylinder Q by using a three-coordinate measuring machine, wherein the position of the center is B; Step (24), making a measurement auxiliary line, namely respectively connecting two straight lines OA and OB in a three-coordinate measuring machine to be used as the measurement auxiliary line; Step (3), rotating the bearing outer ring anticlockwise; the method comprises the following steps of (4) collecting measuring points after bearing rotation, wherein the step (4) comprises the following steps: Collecting the circle center position of the rotated auxiliary cylinder P, namely collecting the circle center of the rotated auxiliary cylinder P by using a three-coordinate measuring machine, wherein the position of the circle center is A'; collecting the circle center position of the rotated auxiliary cylinder Q, namely collecting the circle center of the rotated auxiliary cylinder Q by using a three-coordinate measuring machine, wherein the position of the circle center is B'; Step (43) of making a measurement auxiliary line, namely respectively connecting two straight lines OA 'and OB' in a three-coordinate measuring machine to be used as the measurement auxiliary line; and (5) calculating a bearing contact angle alpha through a formula, wherein the step (5) comprises the following steps: measuring an included angle, namely setting the included angle between OA and OA 'as gamma and measuring gamma in a three-coordinate measuring machine, setting the included angle between OB and