Moving top tailstocks, tailstock systems and machine tools

Abstract

The invention discloses a movable top and tailstock, a tailstock system and a machine tool. The movable top and tailstock includes a top assembly, including a shaft core and a top. The top is located at the front end of the shaft core and is connected with the shaft core. The shaft core has a journal ; Radial static pressure bearing, the journal passes through the radial static pressure bearing, and can expand and contract in the axial direction, there is a radial oil chamber between the radial static pressure bearing and the journal, and the radial oil chamber has a radial bearing The oil channel and the radial bearing oil return channel; the thrust hydrostatic bearing cooperates with the rear end of the shaft core and defines a thrust oil cavity, and the thrust oil cavity has a thrust bearing oil inlet channel and a thrust bearing oil return channel. The rotation precision of the tailstock itself is high, and the precision of the roundness and roughness of the processed parts is high. When grinding the workpiece, the tip rotates together with the workpiece and the shaft core. The tip has no wear in theory, and the life of the tip is longer. The top can move axially and telescopically, and the clamping pressure can be adjusted, and it is also convenient for the movable top to quickly clamp and drop the workpiece during processing, improving processing efficiency.

Description

technical field [0001] The invention is used in the field of mechanical manufacturing, and in particular relates to a movable top tailstock, a tailstock system and a machine tool. Background technique [0002] Ultra-precision machining is a key technology in the field of machinery manufacturing, and the requirements for machining accuracy and machining efficiency of parts are getting higher and higher. Therefore, part clamping technology has become more and more important. Therefore, the two-top clamping technology of the head and tail frame also needs to be improved and optimized. It has also become a major research hotspot to ensure the accuracy of the parts themselves by improving the clamping accuracy of the parts and the rotation accuracy of the head and tail frame itself. [0003] At present, most of the tailstock tops of domestically produced grinders are fixed dead tops. When the workpiece is ground, the top hole of the workpiece and the top of the tailstock move r...

AI Technical Summary

Problems solved by technology

The wear resistance of the tip is poor, and the tip hole needs to be modified by edging, and the tip of the tailstock needs to be disassembled when disassembling and assembling the workpiece, so the processing efficiency is low

When processing parts in batches, the consistency of the roundness and other precision of the parts is not good enough

When the tip hole is worn, the tip is also worn out, and the roundness accuracy of the dead tip itself is not good, so the life of the tip is also short

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