Yamazaki Machinery Works, Ltd.

Hajime Ohashi

Takayoshi Sakai

Hiroyuki Kanematsu

Akimitsu Nagae

Kiyohisa Mizoguchi

Hideaki Iguchi

A method of determining coordinate system in a machining center in which tool exchange is made after resetting the tool to the mechanical zero point. A reference position is set with respect to a program zero point at a position on a coordinate having the origin coinciding with the program zero point. The mechanical coordinate values of the reference position with respect to the mechanical zero point are computed and determined by making a reference portion of the tool coincide with the reference position. Then, the mechanical coordinate values of the program zero point are computed and determined from the reference position. In the tool exchange, the mechanical coordinate value of the program zero point in the direction of axis of spindle is corrected in accordance with the difference of length between two tools, by reading the data concerning the tool lengths from a tool file storing the tool lengths in the direction of axis of the spindle. According to this method, it is possible to compute and determine the mechanical coordinate values of the program zero point without delay even when the tool is changed in the machining center.

Method of determining coordinate system in machining center

Disclosed herein is a method of controlling a numerically controlled machine tool comprising the steps of classifying cutting tools and machining order for the respective machining patterns determined in response to the final machining contour of a workpiece machined by a numerically controlled machine tool like a machining center, for example in case of the final machining contour with a counter bore and a tap, the cutting tools and machining order of centering--drilling--end milling for a counter bore and centering--drilling--tapping for a tap, by the unit of machining patterns; storing the classification in the numerically controlled machine tool; reading, during machining of the workpiece, a unit of machining patterns corresponding to the machining contour of the workpiece on a display unit; machining the workpiece with numerical information as to each machining patterns entered in the numerically controlled machine tool; and displaying the machining process conditions on the display unit.

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Inuyama, Japan

Hajime Ohashi