Machining program creating device, machining program creating method, and machining program creating program

摘要

A machining program creating device (1) that generates a numerical control (NC) machining program (13) for performing a character engraving on a workpiece, the device comprising: a drawing route generating unit (6) that generates a plurality of line segments by dividing a line segment forming a character which is a character engraving target at an intersection position of the character, and sequentially processing to set an end point of a set tool route as a starting point and setting a line segment connected to the starting point as a next tool route; andan NC machining program creating processing unit (7) that generates an NC machining program for moving a tool along the set tool route in the order set by the tool route generating unit, wherein if a line segment not yet set as a tool route exists among line segments connected to the starting point is present, the tool route generation unit searches for a route established only by line segments containing the line segment and not yet set as tool routes, and sets the route found by the search as a next tool route, and if not yet Is not present, the tool route generating unit sets a line segment that has already been set as a tool route again as a tool route between the starting point and an end point that is not yet set as a tool route line segment b and the NC machining program creating processing unit generates the NC machining program such that tool routes later in the machining order among a plurality of same tool routes are extracted from tool routes set by the tool route generating unit with respect to each of the extracted tool routes , a moving time in a fast feed of a tool in the extracted tool route is compared with a moving time when moving a tool on another tool route to allow a tool to move in a Z-axis direction to a starting point of the extracted tool route, and cause a tool to approach an endpoint in the Z-axis direction and, if the travel time required for the extracted tool route is longer than the travel time required for the other tool route, the extracted tool route through the other tool eugroute is replaced, and a tool is moved along the replaced other tool route, wherein, looking for a route set as a tool route, the tool route generation unit (6) after a first route that is a route that is to a starting point from the starting point returns by another endpoint and in which a same line segment is not reused and a same endpoint is not reused, after a second route which is a route returning to a starting point from the starting point through another endpoint, and in which a forward route and overlap a backward route with each other, and after a third route established by a line segment, if the first route is found, searches the found first route as the next tool route preferably to the second route and the third route, and if the first route is not present and the second route is found, the two found te route as the next tool route preferably sets to the third route.