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薄壁齿套挤压倒锥夹具

2019-10-21徐克忠,吴宜华,谢小辉

汽车实用技术 2019年23期

徐克忠,吴宜华,谢小辉

摘 要:在变速器选换档时,同步器滑移齿套内花键两端倒锥是防止脱档的重要结构。冷挤压加工齿套倒锥是一种较为普遍的生产制造方式,但易产生变形,影响批量生產中的质量及效率,针对薄壁类齿套内花键两端挤压倒锥如何控制变形,文章将在如何通过改进挤压夹具结构,即要控制齿套外圆及内花键倒锥变形,又要同时满足制造部门对生产节拍要求的情况下,对某型薄壁同步器滑移齿套冷挤倒锥夹具结构进行了介绍分析。

关键词:齿套倒锥;冷挤压;顶出装置

中图分类号:U463.212  文献标识码:A  文章编号:1671-7988(2019)23-170-03

Thin-walled Tooth Sleeve Extrusion Reversed Taper Fixture

Xu Kezhong, Wu Yihua, Xie Xiaohui

(Ganzhou Qunxing Machinery Co., Ltd., Jiangxi Ganzhou 341000)

Abstract: When selecting and shifting gears for transmission, the inverted cone at both ends of spline in the sliding gear sleeve of synchronizer is an important structure to prevent disengagement. Cold extrusion processing of tooth sleeve inverted taper is a common manufacturing method, but it is prone to deformation, which affects the quality and efficiency of mass production. How to control deformation by squeezing the inverted cone at both ends of the spline in the thin-walled toothed sleeve, this paper will improve the structure of the extrusion clamp. In this paper, the structure of a cold extrusion clamp for sliding gear sleeve of a thin-walled synchronizer is introduced and analyzed, which not only controls the deformation of outer circle and inner spline inverted cone, but also meets the production rhythm requirements of the manufacturing department.

Keywords: Tooth sleeve inverted cone; Cold extrusion; Liftout attachment

CLC NO.: U463.212  Document Code: A  Article ID: 1671-7988(2019)23-170-03

前言

汽车变速器中采用同步器,可以保证换档操作迅速、轻便无冲击,延长齿轮和传动系统的使用寿命,提高汽车在换档和加速起步时的动力性和经济性,同步器技术目前被广泛应用于各种车型上。汽车动力传输是通过变速器来实现的,变速器用来改变发动机传到驱轮上的转矩和转速,目的是在各种行驶工况下,使汽车获得不同的牵引力和速度,同时使发动机在最有利的工况范围内工作。为防止变速器在工作中齿轮与滑移齿套啮合不良而产生自动脱档现象的发生,现将滑移齿套内花键的两端与接合齿相接触的部分,设计成沿齿向方向带有倒锥的方式,从而防止变速器工作中,尤其是重载情况下脱档现象的发生。

1 齿套倒锥常用的加工方法

目前同步器滑移齿套齿向倒锥制造方式一般采取是:插齿法、挤压法、旋分切削加工法。……

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