Numerical control apparatus

Abstract

Disclosed is a numerical control apparatus which comprises: a special command input device for inputting, from outside, a special command for instructing an operation involving a velocity change of a moving target object separate from normal transfer of the moving target object during processing of a workpiece; a calculation unit for calculating, on the basis of a processing path, the amount of movement in the movement axis direction of supports per set unit time; and a driving control unit for transferring corresponding supports to drive devices in accordance with the amount of movement of the supports calculated by the calculation unit. In response to the special command being input in the special command input device, the calculation unit changes the length of the set unit time from the length immediately prior to the input of the special command to a length corresponding to the velocity change of the moving target object instructed by the special command, and calculates from the processing path the amount of movement in the movement axis direction of the supports per set unit time after the length has been changed.

Description

technical field [0001] The invention relates to a numerical control device. Background technique [0002] In various conventional machine tools, workpiece machining is performed by numerically controlling a conveying device that conveys a workpiece or a tool for machining the workpiece in accordance with a machining command program (NC program). Such a machine tool is generally provided with an instructing device capable of instructing operations involving acceleration and deceleration of workpieces and tools by manual operation. An operator or the like gives an instruction through the instruction device to perform operations involving acceleration and deceleration of the workpiece or the tool in addition to normal movement of the workpiece or the tool according to the machining command program. [0003] Specifically, in the machine tool, an emergency stop device, a restart device, an override device, and the like are provided as the instruction device. The emergency stop ...

AI Technical Summary

Problems solved by technology

[0008] However, in the techniques described in any one of the above-mentioned Patent Document 1 and Patent Document 2, in order to alleviate the sudden acceleration and deceleration instructed by the above-mentioned pointing device, the operation recalculated according to the instruction from the pointing device become complicated

Therefore, there is a problem in that the responsiveness from the pointing device to instruct the movement accompanying the acceleration and deceleration of the moving object to the actual execution of the instructed movement of the moving object is poor.

[0009] Specifically, when the above-mentioned emergency stop, acceleration with restart, acceleration and deceleration with the control device, etc. The action accompanied by acceleration and deceleration is performed when the stop button, restart button is turned on or the operation of the control dial is started quickly, and the actual moving track of the moving object does not deviate from the predetermined processing path. In any of the technologies described in Patent Document 1 and the above-mentioned Patent Document 2, since the calculation of the movement command is complicated, the calculation takes time. poor responsiveness

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