The Parallel-Chain in the Machining-Process-Dimension-Chain and Application

This article studies the two-ring-dimension-chain and the parallel connection dimension chain (simply named parallel-chain) in the machining-process-dimension-chain (MDC) and introduces their existence, and decisive position in calculating the tolerance and deviation of all kinds of process dimensions in machining process and concludes a basic idea to find a solution to them, and distribution of their tolerance and deviation. The calculating and analysis method contributes to provide a general solution to solve the dimensions in machining process. A computer aided calculating (CAC) method for the MDC in CAPP applying the MDC theory is introduced, and makes the defining and analyzing of the machining process dimension more easily, fast and practically.