大尺寸薄壁LF6铝合金筒体旋压成形技术  

Spinning Forming Technology of Large Size Thin-wall LF6 Aluminum Alloy Cylinder

作　　者：黑爱卿 李钰 邓全得 陈曦 李仲辉 HEI Ai-qing;LI Yu;DENG Quan-de;CHEN Xi;LI Zhong-hui(Xi'an Aerospace Engine Company Limited,Xi'an 710100,China)

机构地区：[1]西安航天发动机有限公司,西安710100

出　　处：《精密成形工程》2020年第2期43-47,共5页Journal of Netshape Forming Engineering

摘　　要：目的研究大尺寸薄壁LF6铝合金流动旋压成形工艺的可行性。方法采用锻件毛坯反向流动旋压技术,通过设计高精度的旋压模具,将模具与旋压机床采用法兰结构形式固定,模具与产品采用固定卡槽形式固定。旋压过程分三道次进行,以控制每道次减薄率,同时每道次采用不同的进给速度和旋压转速;三道次减薄率分别采用24.3%,32.2%,28.6%,进给速度分别采用1.4,1.2,1 mm/r,旋压转速分别采用200,200,100 r/min。结果实现了锻件壁厚由8.2 mm分别减薄到6.2,4.2,3 mm,锻件长度由650 mm增长到840,1250,1800 mm,同时旋压产品的圆度达到了0.2 mm,整个长度方向壁厚公差为±0.07 mm,母线方向直线度为0.2 mm。结论采用流动旋压技术实现了大尺寸薄壁LF6铝合金筒体的加工,解决了大尺寸薄壁LF6铝合金筒体成形的技术难题,同时生产的产品已在型号上得到了应用。The paper aims to research the feasibility of large size thin-wall LF6 aluminum alloy cylinder in spinning forming process.The forging blank reverse spinning technology was adopted to design high-precision spinning mold.The mold and the spinning machine were fixed in the form of flange structure,and the mold and products were fixed in the form of fixed card groove.The spinning process was completed in three steps to control the thinning rate of each step,and different feed speed and spinning speed were adopted for each step.Through three times thinning rate by 24.3%,32.2%and 28.6%respectively,and feed speed with 1.4,1.2 and 1 mm/r,spinning speed with 200,200 and 100 r/min,the forging thinning thickness was reduced from 8.2 mm to 6.2 mm,4.2 mm and 3 mm;the length of the forgings grow from 650 mm to 840 mm,1250 mm and 1800 mm;and spinning product roundness was 0.2 mm,the length direction of wall thickness tolerance was±0.07 mm;and the straightness of bus direction was 0.2 mm.The processing of large size thin-wall LF6 aluminum alloy cylinder is realized by flow spinning technology.It solves the forming technical problem of large size thin-wall LF6 aluminum alloy cylinder.The product has been applied in engineering example.

关 键 词：薄壁 LF6铝合金 筒形件 流动旋压 

分 类 号：TG335[金属学及工艺—金属压力加工]