1, forging process

Forging is the primary processing in bearing ring processing, also known as blank processing. The main purpose of ring forging is:

(a) obtaining a blank with a shape similar to that of a product, thereby improving the utilization rate of metal materials, saving raw materials, reducing the processing capacity and reducing the cost. (b) Eliminate the inherent defects of metal, improve the metal structure, make the metal streamline distribution reasonable and the metal tightness good, thus improving the service life of the bearing. Forging method: generally, assembly line operation is carried out in the equipment body composed of induction heating furnace, press, reaming machine and forming machine.

2. Heat treatment

The main purpose of ferrule annealing is:

Spheroidizing annealing of high-carbon chromium bearing steel is to obtain the microstructure with fine, uniform and round carbide particles evenly distributed on ferrite matrix, which prepares for later cold working and final quenching and tempering.

3, turning processing

Turning processing is a semi-finished processing of bearing rings, which can also be said to be forming processing. The main purpose of turning is:

(a) Make the machined ferrule have the same shape as the final product. (b) Create favorable conditions for subsequent grinding. Turning method: centralized process method: small batch production of all turning processes is completed on one equipment. Decentralized process method: batch production of a turning process is completed on one equipment.

4. Heat treatment

Heat treatment is the key process to improve the internal quality of bearings. The main purpose of heat treatment is:

(1) Heat treatment can transform the structure of materials and improve their mechanical properties. (b) Improve the internal quality (wear resistance, strength and toughness) of the bearing, thereby improving the service life of the bearing. For high carbon chromium bearing steel Gcr 15SiMn, heat treatment includes quenching and low temperature tempering quenching:

Heating temperature: 820-840 (℃), holding time: 65438±0-2h, cooling medium: low temperature oil tempering:

Heating temperature:150-180 (℃), holding time: 2-5 hours, and cooling mode: air cooling.

5, grinding processing

Grinding is the final processing of bearing rings and rollers, which is called finished product processing.

The main purpose of grinding is:

(a) Make the dimensional accuracy and shape accuracy of the ferrule meet the design requirements. (b) Provide qualified ferrules and ferrules for bearing assembly. Grinding method: generally, it is processed by decentralized processing method, or multiple devices can be connected through feeding and discharging devices to form a production line to improve production efficiency.

6, bearing assembly

Bearing assembly is the last process of bearing production, which has an important influence on bearing performance.

The main purpose of bearing assembly is:

(a) Assemble the processed parts (outer ring, inner ring, roller and cage) into bearing products.

(b) Assemble bearing products with various precision, clearance and other special requirements according to different technical requirements.