Machine tool having onboard measuring device

摘要

A machine tool having an onboard measuring device automatically carries out various works which include ultra precision machining, washing and onboard measuring, by a numerical controller, without any interposition of a worker. For achieving this, an operation region of drive axes of the machine tool is previously divided into a machining region, a washing region and a measuring region. Positions of the drive axes are always monitored by the numerical controller, and when the drive axes enter each of the regions, a work allocated to each of the regions is automatically started and the work is continuously carried out until drives axes exit the region.

主权项

1. A machine tool having an onboard measuring device, which has a plurality of drive axes, machines a machining object by controlling the drive axis by a numerical controller so as to relatively move a tool and the machining object, and carries out a measurement of the machining object by relatively moving the onboard measuring device and the machining object, the onboard measuring device having a probe, the machine tool having the onboard measuring device comprising:
a position detector which detects a position of each of the drive axes; an input unit which inputs a position which is detected by the position detector to the numerical controller; a work determining unit which determines, based on the positions of the drive axes input by the input unit, whether machining of the machining object is to be carried out, measurement of the machining object is to be carried out by the onboard measuring device, washing of the machining object is to be carried out, or washing of the probe is to be carried out; and an execution commanding unit which commands, based on the determination of the work determining unit, machining of the machining object, measurement by the onboard measuring device, washing of the machining object or washing of the probe; wherein the tool and the onboard measuring device are attached to the same drive axis, a moving range of the drive axes in which machining of the machining object by the tool is possible is assumed to be an effective machining range, and a moving range of the drive axes in which measurement of the machining object by the onboard measuring device is possible is assumed to be an effective measuring range, the work determining unit determines: that the drive axes are in a state where machining of the machining object by the tool is possible if the drive axes are in the effective machining range; that the drive axes are in a washing standby state if the drive axes are in a range which belongs to neither the effective machining range nor the effective measuring range; that the drive axes are in a washing effective state if the drives axes enter the effective measuring range from the washing standby state; that the washing has been finished if the washing is stopped after the washing is actually carried out for a predetermined time from the washing effective state; or that the drive axes are in a state where measurement of the machining object is possible if the drive axes are in the effective measuring range and also in a state where the washing is finished.