DRILLING METHOD

摘要

A punching method is provided to reduce variance of processing precision even with plural shafts and to improve processing precision overall. A punching machine used in a punching method comprises a table(1) supported by a guide(30) to be freely moved on a bed(31) in an X direction; a print baseboard(2) decided of position on the table by standard pins(3a,3b); a cross rail(32) fixed over the table at the bed; a guide(33) installed on the front side of the cross rail; a cross slide(34) supported by the guide to be freely moved by a motor(35) and a transfer screw(36) along the guide; and plural housings(37) fixed at the front side of the cross slide. The housing has a spindle inside; a bearing supported by the spindle to be freely moved up and down; a motor(38) fixed at the upper side of the housing to move the spindle through a shaft(39) in a Z direction; and a control unit(40) regulating movement of each unit according to processing program. The punching method comprises the steps for calculating X-way and Y-way deviations about a designed shaft of a drill every certain frequency of each spindle; and processing about at least one sort diameter hole with each spindle if over two sorts of diameter holes and otherwise simultaneously processing the other diameter holes by all the spindles.