METHOD OF CUTTING SCREWS WITH VARIABLE STEP ON A CNC MILLING MACHINE Russian patent published in 2017 - IPC B23C3/32 

FIELD: machine engineering.

SUBSTANCE: using the disk mill having a profile of a screw groove. The workpiece is placed in a dividing head mounted on a turntable, the workpiece is oriented relative to the mill to a predetermined angle of elevation of the screw groove and the depth of the screw groove is adjusted. Provide the position of the cutter parallel to the angle of the helix lifting by controlling the angle of rotation of the turntable about the vertical axis z, which is driven by the stepping motor with control of the machine coordinate through an additional divider. With uniform rotation of the workpiece around the vertical axis, the workpiece is coordinately moved by rotating the turntable and moving it along the X and coordinates.

EFFECT: possibility of processing screw grooves with the prescribed law of changing the pitch, increasing the processing capacity.

7 dwg