不锈钢梯形内螺纹振动辅助冷挤压试验探究  

Experimental Exploration on Stainless Steel Trapezoidal Internal Thread Formation by Cold Extrusion Based on Auxiliary Vibration

作　　者：廖泽南 左敦稳[1] 孙玉利[1] 侯源君 李岚 崔晓飞 

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《南京航空航天大学学报》2017年第6期826-832,共7页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：江苏省普通高校研究生科研创新计划(SJLX16-0115)资助项目

摘　　要：针对目前不锈钢梯形内螺纹的加工多采用车削,由此造成螺纹的表面强度和硬度不高,疲劳寿命有限,在高温高压等极端环境中可靠性得不到有效保证这一现象,提出了一种基于振动辅助的不锈钢梯形内螺纹冷挤压成型技术。采用振动辅助内螺纹冷挤压机床,开展了振动辅助不锈钢梯形内螺纹冷挤压试验探究。试验表明,加工出的内螺纹牙高率达到93.2%,表层显微硬度达到300HV以上,牙面的表面粗糙度为Ra0.53μm,牙形和表面质量相比于传统车削加工出的内螺纹均有了较大提升。Aiming at the problems brought by traditional turning method used in the manufacturing of stainless steel trapezoidal internal thread, a new method of stainless steel trapezoidal internal thread for- mation by cold extrusion based on auxiliary vibration is proposed, which effectually solves the problems such as low surface strength and hardness, limited fatigue life and unguaranteed reliability in extreme environment like high-temperature or high pressure in traditional turning. The experimental exploration on the proposed method is implemented on the machine of internal thread formation by cold extrusion with auxiliary vibration. Results show that this method achieves percentage of thread up to 93.2 %, the surface micro hardness reaches over 300 HV, and the surface roughness of the teeth is Ra0. 53 μm. Compared with the traditional turning method, the internal thread manufactured by cold extrusion based on auxiliary vibration has great improvement on tooth-shape and surface quality.

关 键 词：冷挤压 不锈钢 梯形内螺纹 振动辅助 

分 类 号：TH16[机械工程—机械制造及自动化]