In the bearing production process, the most critical links are as follows:
1. Forging link
Forging link is an important link to ensure the reliability and service life of bearings. After forging raw materials, the blank of bearing ring is formed. At the same time, the structure of the raw materials becomes denser and the flow linearity becomes better, which can improve the reliability and service life of the bearings. In addition, the quality of forging process will directly affect the utilization of raw materials, so as to have an impact on the production cost.
2. Heat treatment
Heat treatment is the bearing ring after forging, machining high temperature treatment, it directly affects the bearing ring carburizing uniformity, can improve the bearing wear resistance and hardness, is also an important link affecting the reliability and life of the bearing.
3, grinding process
The bearing ring after heat treatment also needs to be ground, which is an important link to ensure the accuracy of the bearing. After grinding and processing, the production process of bearing ring is basically completed.
Bearing inner and outer ring technological process: bar -- forging -- car processing -- heat treatment -- grinding -- ultra-fine processing -- parts final inspection -- rust storage
The main production equipment include: cold rolling machine, automatic line ball bearing internal grinder, quenching, annealing furnace, press, CNC lathe, bearing grinding machine, inside outside groove groove grinding machine, grinding machine, high precision horizontal spindle frustum of a cone surface grinding machine, CNC milling machine, centerless grinder, high-precision through feed centerless grinding machine, precision channel over lapping machine, the inner surface nc grinding machine, nc reciprocating double end face grinding machine, high temperature and high speed bearing testing machine, heat treatment production line and quality testing equipment.
Basic production process of rolling bearing
The basic production process of rolling bearings is not completely the same due to the different types, structural types, tolerance classes, technical requirements, materials and batches of rolling bearings.
I. The processing process of various main bearing parts:
1. Ring processing: bearing inner ring and outer ring processing varies according to the difference of the raw materials or blank forms, including car before machining process can be divided into the following three, the whole process is: the bar stock or tube (some bar need to the forging, annealing, normalizing) - car processing, heat treatment, grinding, grinding or polishing parts - final inspection - rust - storage - (stay close set of assembly >
2. Machining process of steel ball, steel ball processing also varies according to the status of raw materials, with sharp cutting or ball in front of the process, can be divided into the following three, before the heat treatment process, and can be divided into the following two kinds, the whole process is: bar or wire cold blunt (some bar after cold blunt still need band and annealing), sharp cutting, coarse grinding, hard or soft grinding ball - heat treatment - grinding, fine grinding, lapping and grinding - final inspection group - rust, packaging, warehousing < to sets of assembly >.
3. Roller of the machining process of the roller varies according to the difference of the raw materials, including heat treatment process can be divided into the following two, before the whole process is: the great skip processing or wire cold heading after string band and soft grinding, heat treatment, series of soft point, coarse grinding, coarse grinding diameter end - the end face grinding, fine grinding diameter - end mill diameter - final inspection group - rust, packaging, warehousing (stay in sets of assembly >.
4. The processing of a cage can be divided into the following two categories depending on the design structure and the raw materials:
(1) Sheet metal → shearing → blanking → stamping forming → shaping and finishing → pickling or shot peening or streaking → final inspection → rust prevention, packaging → warehousing (to be assembled)
(2) entity cage machining process: entity cage processing, according to the difference of the raw materials or bad MAO and differ somewhat, including car before the processing can be divided into the following four kinds of blank type, the whole process is: bar, pipe material, forging, casting, car inner diameter, outside diameter, end face, chamfering, drilling (or pull holes, boring), pickling, final inspection, anti-rust, packaging, warehousing < to sets of assembly >.
Ii. Assembly process of rolling bearing:
Rolling bearing parts, such as inner ring, outer ring, rolling body and cage, shall be assembled in the assembly workshop after passing the inspection. The process is as follows:
Parts demagnetization and cleaning → inner and outer rolling < groove > channel size grouping and selection → sleeve → check clearance → riveting cage → final inspection → demagnetization and cleaning → rust prevention, packaging → put into finished product warehouse (packing and shipping >).