To prevent or reduce the deformation of thin wall bearing ring, the third processing scheme should be adopted and the corresponding measures. (1) the workpiece points of coarse and fine, coarse car placed after a period of time as much as possible after natural cooling of components, to eliminate possible thermal deformation during machining. (2) using the axial compression, change the point clamping force, the workpiece does not produce deformation. Using face clamping hole positioning, because inner hole clearance, so products in processing & lt; 203 mm should be internal control, figure 5 positioning plate positioning seam allowance allowance, processed in the unit, make the product inside hole with positioning plate seam allowance minimum clearance, in axial groove processing, the radial slot, should always make the products under a state of pressure changing internal and external pressure plate, to ensure that the design datum, positioning benchmark and measurement datum is unified, to ensure product quality. (3) the coarse and fine car USES the cooling fluid. The process of turning, the cutting deformation and friction between the chip, cutting tool and workpiece can produce a large amount of heat. The existence of the cutting heat, very bad for turning thin-walled parts. Accordingly, when turning, correctly choose metal cutting fluid, make full use of coolant, not only can reduce the cutting temperature, reduce the cutting force, tool durability, but also reduces the workpiece surface roughness value, reduce the cutting power, the workpiece is not affected by the influence of the cutting heat, little bit error change its form, ensure the quality of parts. When using high speed steel cutter rough machining, mainly decrease the temperature of cutting zone, improve tool life, appropriate selection of cooling from the metal cutting fluid, such as the low concentration of emulsion. When using cemented carbide cutting tools for rough machining, cutting fluid must be continuous, fully pouring, generally there is no cutting fluid. Finish machining, the main effect of cutting fluid is to improve the machining precision of workpiece and reduce the surface roughness value, appropriate chooses the concentration of 10% ~ 20% emulsion or ionic type cutting fluid. (4) the reasonable selection of cutting dosage, reduce the deformation. Rough machining, can be used in a larger and larger amounts are turning ap and feed f. When finishing turning back the ap optional 012 ~ 015 mm, feeding is in commonly 011 ~ 012 mm, or even smaller. For the cutting speed can be according to the workpiece material, diameter of workpiece, cutting tool material and Angle, under some control, generally take v = 6 ~ 120 m/min, at the same time, should prevent the workpiece resonance. 5. Reasonable choice tool geometric angles. Turning thin-walled workpiece, should pay attention to choose the Angle Kr, makes the axial force and radial force in the direction of the poor rigidity reduced, lambda s blade Angle to take positive, sharp edge to grinding, rake Angle and back Angle should obtain corresponding larger. Such as cylindrical finishing tool Kr = 90 ° ~ 93 °, Kr '= 15 °, alpha o = 14 ° ~ 16 °, alpha o1 = 15 °. Inner hole finishing tool Kr = 60 °, Kr '= 30 °, alpha o = 14 ° ~ 16 °, alpha o1 = 6 ° ~ 8 °. In this paper, the keyword search: more Industrial Valves product information
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