Shaft heat treatment fixture

轴件热处理夹具

Abstract

The invention relates to the technical field of heat treatment of rings, and particularly discloses a shaft heat treatment fixture. The shaft heat treatment fixture comprises two clamping jaws oppositely arranged; the clamping jaws are arched; hydraulic cylinders are respectively connected between the end parts of the two clamping jaws; the hydraulic cylinders comprise cylinder bodies arranged in one clamping jaw, and piston rods matched in the cylinder bodies; the end parts of the piston rods are connected with the end part of the other clamping jaw; the cylinder bodies are respectively connected with one-way valves and overflow valves for controlling oil ways; and a driving mechanism for driving external expansion clamping of the clamping jaws is connected between the two clamping jaws. The shaft heat treatment fixture has the following beneficial effects: the heated deformation margin of bearing rings is fed through the oil pressure expansion principle in the hydraulic cylinders to realize secondary clamping in the heat treatment process; and the problem of loose clamping caused by high-temperature deformation of the bearing rings in the prior art is solved.
本发明涉及用于环的热处理技术领域,具体公开了一种轴件热处理夹具,包括两个相对布置的夹爪,所述夹爪为弧形状,两夹爪的端部之间均连接有液压缸,所述液压缸包括设于其中一个夹爪内的缸体,以及配合在缸体内的活塞杆,所述活塞杆的端部另一夹爪的端部相连;所述缸体上分别连接有用于控制油路的单向阀和溢流阀;两个所述夹爪之间连接有用于驱动夹爪外张夹紧的驱动机构。本基础方案的有益效果在于:通过液压缸中油压膨胀的原理来补充轴承圈受热变形的余量,实现热处理过程中的二次夹紧,解决了现有技术中存在的轴承圈高温变形导致的夹持松松动、不牢固的问题。

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