矿冶工程
礦冶工程
광야공정
2001年
2期
72-74
,共3页
管材%拉拔%变形%残余应力
管材%拉拔%變形%殘餘應力
관재%랍발%변형%잔여응력
在空拉黄铜管工艺实验的基础上，探讨了空拉变形工艺对 残余应力和壁厚变化规律的影响。实验结果表明，空拉管具有较大的残余应力；空拉拔时的 道次加工率，加工道次和衬模拉伸时所用衬模的尺寸对管材的残余应力和壁厚变化都有显著 的影响；不均匀变形指数Q可很好地描述变形前后截面尺寸变化及对残余应力的影响。
在空拉黃銅管工藝實驗的基礎上，探討瞭空拉變形工藝對 殘餘應力和壁厚變化規律的影響。實驗結果錶明，空拉管具有較大的殘餘應力；空拉拔時的 道次加工率，加工道次和襯模拉伸時所用襯模的呎吋對管材的殘餘應力和壁厚變化都有顯著 的影響；不均勻變形指數Q可很好地描述變形前後截麵呎吋變化及對殘餘應力的影響。
재공랍황동관공예실험적기출상，탐토료공랍변형공예대 잔여응력화벽후변화규률적영향。실험결과표명，공랍관구유교대적잔여응력；공랍발시적 도차가공솔，가공도차화츤모랍신시소용츤모적척촌대관재적잔여응력화벽후변화도유현저 적영향；불균균변형지수Q가흔호지묘술변형전후절면척촌변화급대잔여응력적영향。
The variation regularits of residual stress and thickaess was disc ussed based on the experiments of brass tube drawn without mandrel. The result s show that tubes drawn without mandred were characterized greater vesidual st ress; the residual stress and tube thickness were remarkably affected by the def ormation amount in one drawing, different drawing times and diameter of the firs t die in the couple die drawing. The heterogeneous deformation index Q can be use d to describe the influnce of cross-section differences before and after the de formation on residual stress.
