3 Steps of Machining

1.Machining Tolerance Requirements

(1)The tolerance of unnoted shape should meet the requirements of GB1184-80.

(2)The allowable deviation of unnoted length is ±0.5mm.   

(3)The tolerance zone of the casting is symmetrical to the basic size configurationof the blank casting.   

2.Requirements for cutting workpiece   

(1)Parts should be checked and accepted according to the working procedure. Onlyafter the inspection of the previous working procedure is qualified can they betransferred to the next working procedure.   

(2)The processed parts are not allowed to have burrs.   

(3)The finished parts shall not be placed directly on the ground, and necessarysupport and protection measures shall be taken.   The processingsurface is not allowed to have rust decay and affect the performance, life orappearance of the bump, scratch and other defects.   

(4)Rolling finishing surface, rolling can not have peeling phenomenon.   

(5)There should be no oxide scale on the surface of the parts after heat treatmentin the final process.   After finishing the mating surface, toothsurface should not be annealed