| 摘要 |
PURPOSE:To shorten pocket working time by drilling continuously holes with a pitch smaller than the radius of a drill in a region surrounded by a controller line to roughly work the region and then working the outline of unworked portion with an outline working tool along the contour line. CONSTITUTION:After the completion of input of pocket shape, hole diameter, hole pitch, drilling tool, working method, rotational speed of spindle. feed speed, etc. are inputted. Next, holes are drilled along an offset path OF1 offset by the radius r of tool inside the counter OL with a pitch p<=r, and then spirally drilles along offset paths OF2, OF3... offset by p inside respectively. Then, requirements for outlet working, feed speed tool used, rotational frequency of spindle, offset direction, etc. are inputted and a processor calculates the respective hole positions Pi to prepare NC data for rough working and sequentially locates the drill with quick feed and thereafter working the holes to a predetermined depth with a predetermained feed speed. Next, the outline working data are prepared by the input data to be sent to the input of a NC unit for working a pocket.
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