Numerical controller, machining route setting method, and non-transitory computer-readable medium recording a program

Abstract

The present invention provides a numerical controller, machining route setting method, and non-transitory computer-readable medium recording a program. To smoothen a machining route more appropriately. A numerical controller of the present invention comprises: a machining program look-ahead unit that acquires a program for machining; a command route mathematization unit that expresses a machiningroute as a parametric line segment or curve on the basis of the program for the machining; and a smoothing processing unit that sets a range of smoothing for a target point of the smoothing along theparametric line segment or curve in an optional range from the target point, and performs the smoothing on the target point on the basis of the set range of the smoothing. The range of the smoothing set by the smoothing processing unit is a range in which a deviation between before the smoothing and after the smoothing on the target point is a set threshold or less.

Description

technical field [0001] The present invention relates to a numerical control device, a machining path setting method and a program. Background technique [0002] Conventionally, when machining is performed by a machine tool or the like, a tool path (machining path) during machining is set, and the set tool path is smoothed. Generally, in the smoothing of the tool path, a quantum (discrete) value is set for each command point so that the application range of smoothing is N (N is a natural number) around the point, and the command path given by the command point is set. smoothing. Therefore, even if the toolpath is the same, if the pattern of cue points is different, the smoothing result will be different. [0003] In order to solve this problem, Patent Document 1 discloses a method of dividing a route between command points at fixed intervals and smoothing the divided points. By using this method, if the tool path is the same, almost the same division point is obtained rega...

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Problems solved by technology

[0005] Then, for example, if Figure 5B As shown, among the adjacent paths whose shape changes little by little, when smoothing is performed, the smoothing application range changes discontinuously between adjacent paths whose smoothing application range changes (N changes) (step difference between paths), which leads to problems appearing as streaks etc. on the machined workpiece

[0006] Regarding this point, in the method disclosed in Patent Document 1, if the tool path is the same, almost the same division point is obtained regardless of whether there is a command point, and the same smoothing result can be obtained by smoothing the division point, but In adjacent paths whose shapes change little by little, even when smoothing is performed, the smoothing application range varies discontinuously between adjacent paths, which may appear as streaks on the workpiece.

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