A common lathe positioning device

Abstract

The invention provides a center lathe positioning device and belongs to the technical field of machinery. The center lathe positioning device solves the problem that an existing lathe positioning mechanism for machining slender shaft type workpieces is poor in positioning effect. The center lathe positioning device comprises a main shaft box, a workpiece and a live centre, wherein a claw disk is fixedly arranged on one side of the main shaft box, a positioning block is embedded to the middle portion of the claw disk, the end face, back onto the claw disk, of the positioning block is a positioning face, a plurality of jack catches are evenly distributed around the axis of the claw disk, each jack catch penetrates the positioning block, jack catches partially protrude out of the positioning face, and all the jack catches can move in the radial direction of the claw disk; the end face, close to the claw disk, of the workpiece abuts against the positioning face, and when all the jack catches move towards the middle portion of the claw disk, the workpiece can be clamped; and the live centre can get close to or keep away from the claw disk, the claw disk, the workpiece and the live centre are coaxially arranged, the end face, facing the workpiece, of the live centre is a plane, and when the plane abuts against the end face, far away from the claw disk, of the workpiece, workpiece positioning is completed. The center lathe positioning device has the beneficial effect that the positioning effect is good.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a positioning device for a common lathe, in particular to a positioning device for a common lathe used for processing long-axis workpieces. Background technique [0002] Lathes are mainly used to process rotary workpieces. When processing workpieces, the workpiece is often positioned through the claw plate on the spindle. Specifically, the top of the spindle is against the workpiece, and then the clamping jaws (mostly three claws) on the claw plate are clamped. Workpiece, realize the positioning of the workpiece. Since the spindle drives the workpiece to rotate during processing, this positioning is more suitable for shorter shaft workpieces. The center of gravity of the short shaft workpiece is close to the spindle, and it can still maintain its own stability when rotating. [0003] For long-axis workpieces, since the center of gravity is far away from the spindle, the unclampe...

AI Technical Summary

Problems solved by technology

[0004] In this way, the workpiece needs to be drilled before turning, which greatly increases the processing technology and processing time, resulting in low production efficiency, and it is necessary to ensure coaxiality when drilling the center hole, which is difficult to process and prone to errors. Affect the positioning effect; in addition, for some workpieces that need to keep the end face flat, additional material needs to be added at the end for drilling the center hole, and at the same time, the added material part where the center hole is located needs to be removed after the machining is completed, further increasing production process, increase the production cost, and the material is relatively wasteful, the production is not ideal

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