CN-121973042-A - Angular contact ball bearing locking amount processing method

CN121973042ACN 121973042 ACN121973042 ACN 121973042ACN-121973042-A

Abstract

The invention discloses a method for machining locking quantity of an angular contact ball bearing, which comprises the steps of firstly selecting the size of a rolling body, calculating and determining the locking quantity to be machined, secondly, machining according to the locking quantity, namely transferring a ferrule after primary grinding to a finishing station, eliminating deviation through radial and axial positioning, controlling a mechanical claw shaft to adsorb the ferrule by a PLC, transferring the ferrule to the grinding station after reaching the standard through detection, starting a diamond roller to grind a channel and the locking quantity according to preset parameters, feeding back data in real time by an online detection system, stopping grinding after reaching the standard, and finally transferring the ferrule to the next procedure, and resetting the mechanical claw shaft. The invention eliminates the position deviation through accurate positioning and online detection, improves the processing precision and stability of the locking quantity, realizes full-flow automation, and improves the production efficiency and the product quality.

Inventors

Fang Lunyang
WANG YONGKUN
Zhu Baodian
XU XIANGXIANG
LI LU

Assignees

人本股份有限公司
上海人本集团有限公司
安徽匹夫轴承有限公司
芜湖双列轴承有限公司

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (5)

1. The angular contact ball bearing locking amount processing method is characterized by comprising the following steps of: step one, selecting the size of a rolling body of an angular contact ball bearing, and calculating and determining the locking amount to be processed according to the selected size of the rolling body; Step two, processing according to the lock quantity to be processed calculated and determined in the step one, wherein the processing process is as follows: firstly, carrying out primary grinding on a bearing ring, after finishing the primary grinding process of the bearing ring, transferring the bearing ring to a locking amount finish machining station through a conveying mechanism, triggering a station positioning mechanism to act after the bearing ring is in place, carrying out accurate radial and axial positioning on the bearing ring, eliminating position deviation generated in the workpiece transferring process, and preparing for subsequent grabbing and adsorbing; Then, after the positioning is finished, the PLC control system sends out an action instruction, a mechanical claw shaft with an air cylinder corresponds to the air cylinder for ventilation, the claw shaft is driven to descend to the reference end surface of the ferrule, the adsorption function is synchronously started, the bearing inner ring ferrule is firmly adsorbed by negative pressure, and after the sensor detects that the adsorption pressure reaches the standard and the workpiece is grabbed in place, the stable grabbing of the ferrule is finished; Then, the PLC program drives a mechanical claw shaft which adsorbs the ferrule to accurately move to a fixed grinding station according to a preset path, after the ferrule is accurately positioned to a grinding processing station, a main shaft of a grinding machine is started to drive a diamond roller to rotate, continuous accurate grinding is carried out on a groove and a locking quantity of the ferrule according to preset processing technological parameters, an online detection system acquires the groove size and the locking quantity value data in real time and feeds the groove size and the locking quantity value data back to the PLC system in real time in the processing process, and grinding feeding is stopped immediately after grinding is carried out until the grinding processing reaches the preset target size and the locking quantity precision requirement, so that the finish processing procedure of the groove and the locking quantity is completed; Finally, after the grinding processing is finished, the mechanical claw shaft keeps the adsorption state of the ferrule, the mechanical claw shaft is controlled by a PLC program to move to the corresponding station of the next working procedure according to the preset safety track, after the workpiece is accurately in place, the cylinder is cut off, the adsorption negative pressure is relieved, the qualified ferrule after processing is stably placed in the positioning tool of the next working procedure, the whole-flow operation of the locking quantity processing of the bearing ferrule is finished, and meanwhile, the mechanical claw shaft is automatically reset to the initial station to wait for the processing cycle of the next ferrule.
2. The method for processing the locking amount of the angular contact ball bearing according to claim 1, wherein the specific manner of calculating and determining the locking amount to be processed according to the selected rolling body size in the first step is as follows: firstly, considering an assembly mode, if the influence of temperature on material deformation is required to be considered in the hot-assembling and cold-assembling of the outer ring and the inner ring, meanwhile, considering the elastic deformation of a bearing material, then considering the limiting value of the diameter change of the outer ring channel and the diameter of the lock point caused by the design of a contact angle design tolerance, which are boundary conditions of the lock quantity change of the bearing, and finally calculating and determining the lock quantity to be processed based on the considered factors.
3. The method for processing the locking amount of the angular contact ball bearing according to claim 2, wherein the specific formula for calculating and determining the locking amount to be processed in the first step is as follows: Formula 1 (((Re-cos alpha× (Re-DW/2) +DPW) -dio) -DW is less than or equal to 0; formula 2 (((Re-cos alpha× (Re-DW/2) +DPW) -dio) x E× delta T-DW is greater than or equal to 0; formula 3 (((Re-cos alpha× (Re-DW/2) +DPW) -dio) x delta× DeltaT-DW is greater than or equal to 0; wherein De is the diameter of the outer ring raceway, DPW is the center diameter, dio is the diameter of the lock point, di is the diameter of the inner ring channel, a is the contact angle, T is the locking amount, re is the curvature of the outer ring channel, ri is the curvature of the inner ring channel, DW is the diameter of the rolling head, E is the linear expansion coefficient of the bearing, delta is the linear contraction coefficient, and DeltaT is the temperature variation.
4. The angular contact ball bearing lock amount processing method according to claim 3, wherein: the specific way of calculating and determining the lock quantity to be processed in the first step is as follows: when hot-fill is used, adopting the combination of the formula 1 and the formula 2 to eliminate intersection, taking the condition that the formula 1 and the formula 2 are satisfied under the limit tolerance condition of the bearing into consideration; When cold fitting is used, equation 1 is used in combination with equation 3, taking into account that equations 1 and 2 are satisfied under extreme bearing tolerance conditions.
5. The method for machining the lock quantity of the angular contact ball bearing according to any one of claims 1 to 4, wherein machining equipment used in the second step comprises two diamond roller tools (1), a rotating shaft (2) and self-priming cylinder tools (3), wherein the two diamond roller tools (1) are respectively positioned on the left side and the right side of the rotating shaft (2), a ferrule to be ground is arranged on the diamond roller tools (1), the self-priming cylinder tools (3) are coaxially sleeved on the rotating shaft (2) and connected with the side face of the rotating shaft (2) through keys, an air seal (22) is arranged between the self-priming cylinder tools (3) and the outer side wall of the rotating shaft (2), the upper end of the rotating shaft (2) is connected with a cylinder motor (4), an air channel (21) is penetrated in the rotating shaft (2), a plurality of tool air holes (31) are formed in the outer side face of the self-priming cylinder tools (3), the plurality of self-priming cylinder tools (31) are communicated with the air channel (21), and the self-priming cylinder tools (31) absorb the air holes to be ground.

Description

Angular contact ball bearing locking amount processing method Technical Field The invention relates to the technical field of bearing machining, in particular to a locking amount machining method of an angular contact ball bearing. Background Despite the mature approach to angular ball bearing design, there is still the problem of undefined boundary conditions in the lock quantity control, which may lead to difficult assembly or rolling element shedding. In the processing link, the traditional locking amount grinding processing depends on the grinding of a rotary diamond roller, the precision of the traditional locking amount grinding processing is directly influenced by the installation position of the roller and the positioning of a ferrule, the processing efficiency is low, the error rate is high, and the production quality is seriously restricted. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide the angular contact ball bearing locking amount processing method which solves the problems of undefined locking amount control boundary condition, low processing precision and poor efficiency in the traditional processing through accurate positioning, online detection and automatic control. In order to achieve the aim, the invention provides the technical scheme that the angular contact ball bearing locking amount processing method comprises the following steps: step one, selecting the size of a rolling body of an angular contact ball bearing, and calculating and determining the locking amount to be processed according to the selected size of the rolling body; firstly, carrying out primary grinding on the bearing ring, transferring the bearing ring to a lock quantity finishing station through a conveying mechanism after finishing the primary grinding process, triggering a station positioning mechanism to act after the bearing ring is in place, carrying out accurate radial and axial positioning on the ring, eliminating position deviation generated in the workpiece transferring process, and preparing for subsequent grabbing and adsorbing; Then, after the positioning is finished, the PLC control system sends out an action instruction, a mechanical claw shaft with an air cylinder corresponds to the air cylinder for ventilation, the claw shaft is driven to descend to the reference end surface of the ferrule, the adsorption function is synchronously started, the bearing inner ring ferrule is firmly adsorbed by negative pressure, and after the sensor detects that the adsorption pressure reaches the standard and the workpiece is grabbed in place, the stable grabbing of the ferrule is finished; Then, the PLC program drives a mechanical claw shaft which adsorbs the ferrule to accurately move to a fixed grinding station according to a preset path, after the ferrule is accurately positioned to a grinding processing station, a main shaft of a grinding machine is started to drive a diamond roller to rotate, continuous accurate grinding is carried out on a groove and a locking quantity of the ferrule according to preset processing technological parameters, an online detection system acquires the groove size and the locking quantity value data in real time and feeds the groove size and the locking quantity value data back to the PLC system in real time in the processing process, and grinding feeding is stopped immediately after grinding is carried out until the grinding processing reaches the preset target size and the locking quantity precision requirement, so that the finish processing procedure of the groove and the locking quantity is completed; Finally, after the grinding processing is finished, the mechanical claw shaft keeps the adsorption state of the ferrule, the mechanical claw shaft is controlled by a PLC program to move to the corresponding station of the next working procedure according to the preset safety track, after the workpiece is accurately in place, the cylinder is cut off, the adsorption negative pressure is relieved, the qualified ferrule after processing is stably placed in the positioning tool of the next working procedure, the whole-flow operation of the locking quantity processing of the bearing ferrule is finished, and meanwhile, the mechanical claw shaft is automatically reset to the initial station to wait for the processing cycle of the next ferrule. The method comprises the following steps of firstly, considering an assembly mode, considering the influence of temperature on material deformation if the outer ring is hot-filled and the inner ring is cold-filled, considering the elastic deformation of bearing materials, considering the limit value of the diameter change of an outer ring channel and the diameter of a lock point caused by contact angle design tolerance design, which are boundary conditions of the change of the lock quantity of the bearing, and finally, calculating and determining the lock quantity to be processed based on the considered fa