| 摘要 |
PURPOSE:To perform a job for highly accurate measuring, by using an in-process gauge to be used for a machining cycle as it is, and measuring dimensional accuracy, roundness and cylindricity of a workpiece immediately after being machined in leaving even a holding state of the workpiece left in a state of being machined intact. CONSTITUTION:Measurement on a precision metalcutting machine takes place in use of an in-process gauge intact as a measuring instrument under the same condition as a machined state immediately after machining. Measurement of roundness takes place in the following method that a workpiece W is rotated at slow speed at the same measuring position, sampling the measured value at every unit turning angle, and both maximum and minimum values are found out of each of these measured value within one rotation, thereby operation the difference. Likewise, measurement of cylindricity takes place in the following method that a left end position a1 and a right end position a2 of the same machining surface, as a measuring position, are measured each just like as aforesaid, and a difference between the maximum value and the minimum value in both measuring positions is operated. Thus, the measurement can be done under the same condition at the time of machining, so that a measuring error is hard to occur, thus highly accurate measurement can be done.
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