Method for in-process-measurement of radius error of crankshaft during pin chasing process in pin chasing grinder, involves calculating radius error from deflection of tactile device for number of angle steps

摘要

#CMT# #/CMT# The method involves processing a workpiece (14) under rotation around a rotational axis, and setting a measurement device (16) on the workpiece so that the device has contact with the workpiece in two contact points (18, 20). A tactile device (22) is brought into contact with the workpiece, and deflection of the tactile device at different rotational angles of the rotational axis is measured and stored. The rotational angles are detected at equidistant angle steps, and a radius error is calculated from the deflection of the tactile device for a number of angle steps. #CMT# : #/CMT# An independent claim is also included for a machining tool comprising a rotary device. #CMT#USE : #/CMT# Method for in-process-measurement of a radius error of a workpiece i.e. crankshaft, during a machining process i.e. pin chasing process, in a machining tool i.e. pin chasing grinder (all claimed). Can also be used for in-process-measurement of the radius error during winding of metal sheets and strips. #CMT#ADVANTAGE : #/CMT# The rotational angles are detected at the equidistant angle steps, and the radius error is calculated from the deflection of the tactile device for the number of angle steps, thus enabling simple and rapid detection of measured data without excessive large error during calculation of the radius error, and hence enabling the data to be utilized for evaluating and improving kinematics of the machine tool. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view illustrating kinematics of a machine tool during a pin chasing process. 10 : Tool 14 : Workpiece 16 : Measurement device 18, 20 : Contact points 22 : Tactile device.