Patent ID: 9175719
Filing Date: 2015-11-03
Classification: B23P,F16C,G01M,G05B,Y02P

Abstract:
1. A method of determining a center hole of a material crankshaft that is obtained through molding with a first mold and a second mold, the method comprising using a computer and a shape measuring machine to: obtain first shape data of a first portion of the material crankshaft molded by the first mold by measuring the first portion; obtain second shape data of a second portion of the material crankshaft molded by the second mold by measuring the second portion; compute a first misalignment amount of the first portion due to a misalignment between the first and second molds by comparing the first shape data with first designed data corresponding to the first mold; compute a second misalignment amount of the second portion due to the misalignment between the first and second molds by comparing the second shape data with second designed data corresponding to the second mold; obtain first revised designed data based on the computed first misalignment amount; obtain second revised designed data based on the computed second misalignment amount; adjust, based on the misalignment amount, data corresponding to the misalignment amount so as to reproduce actual shape data; and determine, based on the actual shape data, a position of the center hole in the material crankshaft such that a rotation balance of the material crankshaft is within a predetermined range.