Universal positioner for drilling center hole

Abstract

The invention provides a universal positioner for drilling a center hole. The universal positioner comprises a left V-shaped body and a right V-shaped body, two rack rods are arranged between the left V-shaped body and the right V-shaped body, a gear is arranged between opposite teeth of the two rack rods, a left clamping plate and a right clamping plate are separately arranged on two end faces of the gear, and a drill bushing is arranged in a gear hole. The left V-shaped body and the right V-shaped body are separately provided with a hand twisting screw, copper bushes are arranged at one ends of the rack rods, and nuts are arranged at the other ends of the rack rods. The positioner is wide in universal range and accurate in positioning center, the center hole drilled under the guide of the drill bushing is not inclined, so that the positioner is simple, convenient and rapid to operate.

Description

technical field [0001] The invention belongs to the field of machinery, and in particular relates to a universal positioner for drilling center holes. Background technique [0002] In the machining process, it is often encountered that many workpieces with large diameter and long length are processed on the lathe. Before turning such workpieces, it is necessary to make a 60° center hole on the end surface of the blank round steel of the workpiece. Then lathe can clamp the center hole of one end outer circle of blank round steel, the other end of top blank round steel to carry out turning process. In the past, three methods were used to drill the center hole for the large-diameter and long workpiece blank round steel: one method is to clamp the workpiece blank round steel directly on the lathe and drill a center hole at one end, when the lathe center frame is placed on the blank round After the outer circle of the steel is put on, due to the poor roundness of the outer circl...

AI Technical Summary

Problems solved by technology

In the past, three methods were used to drill the center hole for the large-diameter and long workpiece blank round steel: one method is to clamp the workpiece blank round steel directly on the lathe and drill a center hole at one end, when the lathe center frame is placed on the blank round After the outer circle of the steel is put on, due to the poor roundness of the outer circle of the blank round steel, when the bed is started to drive the workpiece blank round steel to rotate, the workpiece blank round steel will shake and be unstable, which will cause the front end of the center drill bit to be damaged. break off

The second method is to manually draw a line on the end face of the billet round steel by planning, find out the center of the billet round steel, make a punch hole at the position of the center point of the visual inspection, and then hold the center drill bit with a hand-held electric drill to align The central hole is drilled out by punching the sample. The central hole drilled by this method is relatively eccentric to the outer circle of the billet round steel, and it is difficult to grasp the correct posture with the hand-held electric drill, which makes the drilled central hole skewed.

The third method is to make center hole drilling molds corresponding to various diameters of billet round steel. Although this method is feasible, it results in many specifications of drilling molds, inconvenient management and waste of raw materials.

Images