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2(a) and 2(b), this division includes two methods: one is to divide the workpiece into N equal portions with the chord through the center of circle. The other is to divide it into several continuous rings with concentric circles of different radius. It is a method to evaluate the lapping uniformity of workpiece by counting the intersection point of each chord or each circle with the trajectory. Although the method has improved by comparing with area division I in the overall evaluation of the workpiece, there are still shortcomings in this area division according to calculation.
Can be reduced. In single-tooth angle error decreases, the base section of the length and base arc tooth thickness effective control and can setup the movement caused by the impact of reduced eccentricity. Therefore, the first performance of the group I a number of error: an integrated error ∆ ` tangential and radial integrated error ∆ " , the cumulative pitch error of gear ring radial runout and the normal length change in tolerance can be reduced. As in NC milling, the use of the base circle of the most important parameters for the control of the object, and therefore affect the accuracy of the factors that gears can be most effective control to reduce the error caused.
W. the energy consumption and increase the labor productivity, but also can reduce or eliminate the oxidization, de-carbonization and other defects during the process of holding time. Therefore, it can improve the quality the quality of product [4-7]. 40Cr steel is widely used in manufacturing of the shaft and the important bolt which are demanded to have high strength, good plasticity and good low-temperature impact toughness. The conventional quenching process is oil cooling after holding for a while at 860℃.
Digital Design and Manufacturing Technology II by Edited by Congda Lu