Workpiece machining surface display method showing dimples to be formed on mashing surface, workpiece machining surface display device showing the dimples, and tool path generation device having the display

A workpiece machined surface display device displaying a machining mark to be formed when machining a workpiece machined surface with a rotary tool having a cutting blade, comprising:

• a display device;
• a dimple specifying part specifying shapes and positions of dimples to be formed by cutting the workpiece machined surface with the cutting blade when the rotary tool is rotated and fed, by reading shape data of the workpiece and shape data of the tool and calculating a workpiece shape model after machining;
• and
• a display control part controlling the display device so as to display dimple images representing the shapes of the dimples specified by the dimple specifying part at the positions specified by the dimple specifying part,
• wherein when the dimple specifying part specifies the shapes and positions of dimples, calculations are performed to identify cusps that have convex shapes and are portions of the workpiece that are not cut when the rotary tool is rotated and fed, and the calculation are designed so that the cusps define the dimples in plan view as connected polygons having edges of straight lines, and the calculations are based on a configuration that each dimple is formed during one rotation of the cutting blade.

A tool path generating system generating a tool path for machining a workpiece surface with a rotary tool having a cutting blade, comprising:

• a display device;
• a dimple specifying part specifying shapes and positions of dimples to be formed by cutting the workpiece surface with the cutting blade when the rotary tool is rotated and fed, by reading shape data of the workpiece and shape data of the tool and calculating a workpiece shape model after machining;
• a display control part controlling the display device so as to display dimple images representing the shapes of the dimples specified by the dimple specifying part at the positions specified by the dimple specifying part;
• and
• a path generating part generating a tool path of the rotary tool based on the shape and position of the dimple specified by the dimple specifying part,
• wherein when the dimple specifying part specifies the shapes and positions of dimples, calculations are performed to identify cusps that have convex shapes and are portions of the workpiece that are not cut when the rotary tool is rotated and fed, and the calculation are designed so that the cusps define the dimples in plan view as connected polygons having edges of straight lines, and the calculations are based on a configuration that each dimple is formed during one rotation of the cutting blade.