Finishing of forgings

Source: Bearing network time: 2017-09-15

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The intention of finishing is to remove the burrs and yttrium oxide of the ferrule forgings.
When the forging burr scale exceeds the forging skill condition; it is ground on the grinding wheel; and usually before the forging is annealed.
Forgings yttrium oxide is usually carried out after annealing; there are two types of horizontal drum finishing and shot blasting finishing:
1. Horizontal drum finishing: Many bearing rings with different scales are loaded together into a horizontal drum that reverses at a speed of 20-60r/min and smashed and hit each other; the cerium oxide is dropped from the surface of the forging; together It can polish the burrs and edges of the forgings; in order to speed up the finishing; sometimes put some scrap balls in the drum. The finishing time is usually 10~20min. This method is simple and easy; but the finishing quality is poor.
2. Shot blasting finishing: loading the forging into a horizontal sealing drum that is converted at a low speed (2.5 to 3r/min); iron or steel pellets with a particle size of 0.8 to 1.2 mm; The blade is thrown and rushed onto the forging; the cerium oxide is dropped by the impact. The steel pellet can be actively circulated; the cerium oxide is sucked out by the vacuum cleaner; the forging impact noise is small.

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