The invention provides a
deep hole piston rod
deep hole and outer circle coaxiality control method. The method comprise the following steps that (a) the end face of the large-head end of a
piston rodand the end face of the hole opening end of the
piston rod are flatten through turning, outer circles of the
piston rod undergo semi-finish turning, and a
blind hole is drilled from the center of thehole opening end; (b) the wall thickness of one circle at the deep part of the
blind hole is measured, and the correction size of the outer circle of the large-head end is calculated; (c) the positioncorresponding to the central axis of the
blind hole is found on the outer circle of the large-head end by utilizing the correction size, and two reference outer circles are turned on all the outer circles of the
piston rod correspondingly; and (d) the two reference outer circles are used as reference, the
piston rod is fixed, the end face of the large-head end is flattened through turning, the center hole of the end face of the large-end is corrected, the outer circle at the large-head end is turned to meet the required size through the center hole of the large-head end, the end face of the hole opening end is flatten through turning, a
rabbet of the hole opening end is turned, and other outer circles are turned to meet the required sizes through the
rabbet of the hole opening end. According to the
deep hole piston rod deep hole and outer circle coaxiality control method, the advantages that the design is novel, the product quality is good, the production cost is low, and the production efficiency is high are achieved.