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An automatic programming device provided with: a machining area shape-generating unit for generating machining area shape data, which is the shape of the machining area to be machined using machining unit data; and a chamfering tool path-generating unit for generating, when the machining area shape is a region to be chamfered, chamfering tool path data for the chamfering from chamfering data, which includes machining area shape data, data on the tool used, and data on machining conditions.
In order to obtain an automatic programming device which is capable of generating a tool path for chamfering with a simple operation, and reducing operate time so as to improve machining efficiency when applying the chamfering, disclosed is an automatic programming device which is provided with a chamfering tool path generating unit (9) that generates tool path data for the chamfering from data including the shape data of a part to be chamfered, the data of a tool in use, and machining condition data, wherein the chamfering tool path generating unit (9) has a chamfered surface defining unit (21) that generates the shape data that defines the chamfered surface after the chamfering in accordance with the shape of the part to be chamfered, a reference point sequence generating unit (22) that generates a reference point sequence serving as a reference for generating the tool path data for the chamfering, and a tool reference position generating unit (23) that generates the reference position of a machining tool when the machining tool passes through the reference points of the reference point sequence and the chamfered surface generated by the chamfered surface defining unit while applying the chamfering thereto.
The automatic programming device (1) comprises a machining profile setting section (14) for recognizing, based on data for specifying a graphic element selected as the outline shape of a machining portion out of the graphic elements of a graphic defined by two-dimensional CAD data, a graphic element corresponding to the data and setting a machining profile, i.e. the outline shape, of the machining portion based on the recognized graphic element, a CL data creating section (23) for creating tool path data based on the machining profile thus set, and a section (26) for creating an NC program based on the tool path data thus created.
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