Patent ID: 6540235
Filing Date: 2003-04-01
Classification: B23B,Y10T

Abstract:
A graduated rotation control chuck assembly comprising:a base, said base comprising a workpiece receiving chamber, said workpiece receiving chamber having a first lateral side and a second lateral side opposite to said first lateral side; a holding-down rod mounted in said base inside said first lateral side and aimed at said second lateral side and moved axially in and out of said workpiece receiving chamber; and a graduated rotation control unit, said graduation unit comprising a rotary shaft mounted in said base inside said second lateral side and axially aimed at said holding-down rod, said rotary shaft comprising a first contact portion and a second contact portion, a first piston rod, and a second piston rod, said first piston rod and said second piston rod being axially sleeved one inside the other and mounted in said base; wherein said first piston rod and said second piston rod are alternatively reciprocated against said first contact portion and second contact portion of said rotary shaft, causing said rotary shaft to be rotated step by step at a fixed angle per step.