Numerical controller, program recording medium, and control method

Abstract

The invention provides a numerical controller, a program recording medium, and a control method, which can prevent the cutting speed from becoming too high. The numerical controller according to one embodiment of the present disclosure is provided with: a reference speed calculation unit that calculates a main shaft speed, which is the rotational speed of the main shaft that complies with a machining program, and a feed speed, which is the movement speed of the feed shaft that complies with the machining program; an oscillation command calculation unit that calculates an oscillation command, which is a periodic variation component that overlaps a command for the feed axis, on the basis of the spindle speed, the feed speed, and a preset oscillation frequency magnification; a setting acquisition unit that acquires an upper limit value of the frequency of the oscillation command; and an adjustment unit that adjusts the frequency of the oscillation command or adjusts at least one of the main shaft speed and the oscillation frequency magnification so that the frequency of the oscillation command does not exceed the upper limit value.

Description

technical field [0001] The present invention relates to a numerical control device, a program recording medium and a control method. Background technique [0002] Conventionally, a machine tool such as a lathe is used. The lathe has a main shaft for rotating a cutting tool or a workpiece to be processed and a feed shaft for relatively moving the cutting tool with respect to the workpiece. The workpiece is cut by the cutting tool. Most of these machine tools control the spindle, feed axis and other drive axes through numerical control devices. [0003] In addition, on machine tools such as lathes, the tip of the cutting tool usually scrapes material from the surface of the workpiece continuously. Therefore, depending on the material of the workpiece, the scraped material becomes thin and long cutting chips (swarf), which may become entangled. On the cutting tool thus hindering the machining of the workpiece. On the other hand, as described in Patent Document 1, for example...

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Problems solved by technology

[0003] In addition, on machine tools such as lathes, the tip of the cutting tool usually scrapes material from the surface of the workpiece continuously. Therefore, depending on the material of the workpiece, the scraped material becomes thin and long cutting chips (swarf), which may become entangled. on the cutting tool thereby hindering the machining of the workpiece

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