Gas spring metal cutting machine long axis of the workpiece during machining , it is necessary to use with tailstock body , one end of the workpiece is clamped by the chuck , and the other end is held in the center of the top of the top end face of the tailstock this structure is a rigid top holding . In the process, the long axis of the workpiece will have a certain amount of heat elongation due not released , then the workpiece will be a certain amount of bending , machining accuracy . Now offers a long axis of the workpiece during machining can adjust the thermal elongation , bending does not occur, to ensure accuracy and improve the quality of the workpiece floating tailstock hydraulic spring preload to overcome the deficiencies of the prior art .
Traditional tailstock divided into manual tailstock , hydraulic and pneumatic tailstock tailstock . According to the principle of eccentric locking manual tailstock on the bed , waving a hand wheel to screw driven tailstock spindle forward and backward. Hydraulic and pneumatic tailstock tailstock hydraulic principle and in accordance with the principle of making pneumatic tailstock spindle forward and back, using a limit switch to prevent its collision with the saddle on the tailstock body . Hydraulic tailstock , for example, the body has a tailstock sleeve , the inner sleeve is attached to the top portion of the front body ; tailstock after terminating the cylinder body are fixedly connected at the rear end of the inner sleeve of the tailstock body back cover , the back cover is connected to the outer cylinder to match the end of the piston rod . The action can be driven cylinder cover and slide the sleeve tailstock body , stretched out to reach the top top top holding the workpiece or retract purposes. But this only when the tailstock chucking a workpiece positioning.
Analysis slender shaft axis workpiece machining status , usually with a central turret rack or auxiliary support to prevent deformation due to the cutting force , if holders of ordinary tailstock top, heat distortion will inevitably generated by the cutting shafts the bending compensation. However, if the tailstock floating design, thermal deformation of the processing will be elongated by the tailstock and the internal compression spring to compensate for the machining precision of the parts have a good guarantee.