Self-centering lathe center frame

Abstract

The invention discloses a self-centering lathe center frame. The self-centering lathe center frame comprises a shell, a center arm and two supporting arms; the front end of the center arm and the front ends of the two supporting arms are each provided with a supporting wheel set; the center arm is a cylinder body of an oil cylinder hidden in the shell, and a safety valve is assembled at the end ofa piston rod of the oil cylinder and installed on the rear end face of the shell; roller sets are symmetrically installed on the upper side face and the lower side face of the center arm, and outwards-protruding arc-shaped rolling faces in rolling contact fit with the roller sets are formed on the rear sections of the supporting arms; and the center arm moves forwards under the action of hydraulic pressure, meanwhile, the two supporting arms are pushed to synchronously move and fold through rolling force application of the roller sets to control a workpiece in a circle formed by supporting points of the three supporting wheel sets, and a return plate used for driving the supporting arms to be opened and reset when the center arm retreats is hinged to the center arm. According to the self-centering lathe center frame, by the adoption of the design of the built-in oil cylinder, the boundary dimension of the center frame is reduced, the clamping range is enlarged, reliability is high, using performance is good, and the self-centering lathe center frame is suitable for a machine tool with a small installation space and a large clamping range.

Description

technical field

[0001] The invention relates to the technical field of mechanical processing equipment, in particular to a center frame applied to a lathe, in particular to a center frame of a self-centering lathe. Background technique

[0002] The center frame is an auxiliary support device used in the turning or grinding process of slender shaft parts, which makes it possible for high-precision machining of ultra-thin optical shafts, precision screw rods, ball screws and other parts. In the prior art, the mechanical three-jaw transfer center rest is commonly used on lathes. This kind of center rest is not only troublesome to adjust the center of the workpiece, but also difficult to install in the space due to its large size and small clamping range. Machine tool with small clamping range. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide a self-centering lathe steady rest with built-in oil cylinder design, small...

Images