Crossed roller bearing assembly points and quality measures

Thin-walled cross cross roller bearings according to its structure, the assembly stage needs to grasp the bearing clearance control, rotary accuracy and stability of 3 points, cross 

roller bearings belong to special bearings with high precision, is mainly used in CNC machine, robot arm, as well as medical and military equipment, which are double row roller 

in a 45 degree tilt angle roll cross distribution channel, can maintain high rigidity on the roller and raceway contact line, but also because of a 45 degree tilt angle raceway 

can be uniformly load of axial and radial bearing, perfect overturning or torsional moment; in addition, cross roller bearings with negative clearance design and pre tight, can 

high rigidity bearing guarantee (compared with traditional models, rigid increase 3~4 times) and high precision, cross roller bearings precision Luoyang Boying bearing is in P5 

above, basic accuracy of P4, P2, belongs to high precision bearing:

1 crossed roller bearing clearance control bearing production processes in the two process to ensure the bearing clearance, a bearing end grinding, roller bearing sleeve so need 

beforehand medium size of test equipment, test equipment with rotary bearing is smooth, the negative clearance has a slight pressing feeling, can ensure the roller and the 

raceway with clearance at around 0.01mm, preparing for the next assembly; second procedures for fitting test equipment, the bearing does not install the isolation block or 

holder of test equipment, there are 5 groups of roller for choice, according to the assembly member feel and a dial indicator measuring judgment clearance is required, if don't 

be by replacing the roller and raceway grinding to finish the match, this method can also be used in the production of the turntable bearing YRT, is commonly used in bearing 

production method, just cross angular contact ball bearing are precision bearing, clearance requires precise control;

2 rotary accuracy and stability control; through production practice experience for many years we know, rotary precision cross roller bearings and YRT turntable bearing mainly, 

and the raceway quality and deformation, therefore, all bearing before shipment is half finished product assembly, prevent long after placing deformation, and thin-walled cross 

miniature ball bearings in the grinding time by tempering 2 times treatment, ensure the material stress release caused by deformation of the risk to a minimum; the actual assembly of a 

rotary impeded, the bearing cleaning, check whether there is damage raceway, then the accuracy of roundness and flatness.

Measuring to ensure the bearing quality.‍