PROGRAMMABLE HYDRAULIC STEADY REST FOR CNC LATHE
Abstract
In the present scenario Automation plays a vital role in carrying on the production processes effectively in the production shop. Especially while carrying on machining operations the automation is very much essential .In most of the industries they are facing the problems such as vibration and other effects like deflection on work piece while carrying on machining operations on Axis centered CNC lathe or else on a normal lathe. Good surface finish also will not be obtained when proper support is not given on the slender work piece in performing machining operations.. Hence in order to overcome the problems of deflection and vibration effects on slender work pieces we tend to utilize the Self centering steady rest. The self centering steady rest will be arranged such that it will be placed between the rollers to give support to the work piece. A steady rest is disclosed for alternatively supporting the internal and external surfaces of a tubular work piece during a machining operation. Each outer end of a plurality of movable fingers includes first and second work piece contact devices such as rollers. The second contact device is offset from the longitudinal axis of the finger so that it may engage the inner periphery of the work piece. The opposite inner ends of the outer fingers ride in slots having opposing accurate cam surfaces. One cam surface provides backup support for its finger when externally contacting the work piece while the other cam surface insures stability when its finger is contacting the inner periphery of the work piece. It facilitates clamping activity automatically based on the position of the tool. When the tool reaches the clamp it automatically leaves the space to carry on the machining operations. The input to that device is given by hydraulic pressure.We can say that by means of facilitating the self centering steady rest we can increase the productivity by reducing cycle time, obtain higher accuracy and good surface finish and also overcomes the deflection and vibration problems.
