Rolling ring forming

Although many types of bearings, their structure type, tolerance level, material selection and processing methods differ, but the basic manufacturing process contains the following:
     Bearing parts manufacturer - bearing parts inspection - bearing parts demagnetization, cleaning, rust - bearing assembly - Bearing Final inspection - bearing product demagnetization, cleaning - grease the bearings packed fighting finished product storage.
Rolling ring is an important part, due to a wide variety of rolling bearings, bearing rings made of different types of size, structure, manufactured using the equipment, technology and methods vary. Also, because the ring machining process more complex process, requiring high precision, therefore, the quality of the bearing ring machining accuracy, service life and performance have a significant impact.
Rings of raw materials for the manufacture or possession of cylindrical bar stock material, now under different molding process, bearing rings generally have the following manufacturing process.
1) (bar), the material - forged - annealed (or normalized - Turning (Cold Rolling Forming) - heat quenching and tempering - grinding - Part Inspection - demagnetization, cleaning - Submit assembly
2) (bar, tube feeding), the material - cold rolling forming - heat quenching and tempering - grinding - Part Inspection - demagnetization, cleaning - submit assembly
3) (tube material), the material - turning molding - heat quenching and tempering - grinding - Part Inspection - demagnetization, cleaning - Submit assembly
4) (bar), the material - cold (warm) extrusion - Turning - heat quenching and tempering - grinding - Part Inspection - demagnetization, cleaning - Submit assembly
Ferrule molding method
Ring current processing, forming methods are the following: forging molding, turning forming, cold rolling and cold forming (warm) extrusion. In the above molding method, the forging forming most widely used, the total production of about 80%, for some generic products can be used a small rod (tube) feeding directly turning shape. 80 years since the 20th century, China's small and medium enterprises in the production of small and medium rings using a cold rolling and cold (temperature) compression molding process.
1) Forging Forming
Through the inner metal forging to eliminate defects and improve the metal structure, a reasonable distribution of the metal flow lines, metal, close is good. Forging forming process widely used in bearing molding processing to be completed from the small diameter of ~ 20mm diameter 5000mm products to the large product processing. Forging a common molding method are: hot forging process, cold working, warm forging process, the forging of the main.
Hot molding processing equipment because of their different processing is divided into: free forging process, forging presses, forging machines flat upsetting forging process and high-speed machine forging process.
      2) Cold Rolling Forming
Is a cold rolling process to improve material utilization, improving metal tissue density, keeping the metal advanced techniques of linear flow, which is a non-chip processing methods. In theory, the cold rolling forming the products were not turning the heat treatment directly and grinding. At present, the cold rolling process is mainly used in medium and small deep groove ball bearings, the main process is:
Rough forging (the ring) - Turning (except Channel) - Rolling (groove and chamfer) the entire path - Polishing both ends of the surface
By cold rolling process and forging forming process, the product besides the precision accuracy of equipment, but also by the precision of mold.
3) Turning Shaping
In the bearing industry, the traditional molding technology is the use of dedicated turning lathe, a centralized method to complete forming process. However, the equipment used to adjust the method is difficult, low-precision machine tools, material utilization is low, so the process method is being phased out.
With the development of science and technology, CNC turning, and rapid development of increasingly sophisticated tools. Currently, a number of complex shape, high precision products are increasingly using CNC turning molding technology.
In summary, the direction of forming rings should be toward the high utilization of metallic materials, high efficiency, high precision molding direction. Therefore, high-speed technology upsetting, cold rolling, CNC forming technology will be turning more and more applications.
Related Keywords: Steel Linear Bearing  Large Linear Bearings  Linear Ball Bearings  Precision Linear Bearing