Yamazaki Machinery Works, Ltd.

Yuji Sano

Hiroyuki Kanematsu

Kazuki Uemura

Koji Matsumoto

Katsuhiko Tomori

Hideo Hashimoto

A tool or a workpiece is fed by the cut feed by cut feed commands during periods when the tool or the workpiece would normally be fed by rapid feed. These periods are chosen to occur when the distance of the sections to be fed is a predetermined distance or less. Then, in the case that the feeding distance is the predetermined distance or less, the tool or the workpiece can be fed more rapidly by cut feed rather than rapid feed. Thus, machining time is shortened to that extent.

Feed control method in a numerically controlled machine tool

The machining to be achieved is classified in accordance with the machining shape into a plurality of machining units. A tool combination memory stores tool combination lines each containing an array of tool information in the sequence of use in each machining unit. As the operator appoints some of the machining units, corresponding tool combination lines are read out from the tool combination memory and are stored in sequence in a machining program memory. The tools presented by the tool combination lines in the machining program memory are then rearranged and lined up on the basis of the tool to form a machining tool combination. The machining is made in accordance with the machining tool combination in such a manner that the machinings of different machining units achievable by a tool common to these machining units are conducted simultaneously without necessitating repeated mounting and demounting of such tool.

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Hashima, Japan

Yuji Sano