Design in the mandrel land and smoothing the deformation of rectangular tube drawing
矩形管成品拉拔的芯头工作带设计与变形平滑化
Experimental results show that the manufacturing of micro grooves includes two stages,namely,the extrusion and the forming stages,that the proce-ssing of micro grooves is mainly affected by various factors,such as the geometric parameters and working position of the multi-tooth mandrel,the depth reduction,the drawing speed,the spinn.
对直齿微沟槽铜热管的高速充液旋压拉拔成形加工机理进行了研究,建立了微沟槽高速充液旋压成形的几何模型,通过实验发现:微沟槽的加工包括挤压和成形两个阶段;影响微沟槽成形的主要因素包括多齿芯头几何参数、芯头位置、减薄量、拉拔速度、旋压器转速和工作温度等;通过控制挤压深度、进给量、芯头形状与位置等,可加工出不同形状、不同深宽比及不同壁厚的微沟槽;高速充液旋压加工微沟槽在生产上具有可行性,其材料利用率和生产效率高,成本低廉。
FEM simulation of the optimization of the die angle with the floating plug drawing process of copper tubes;
铜管游动芯头拉拔模具角度优化的有限元模拟
Drawing pass optimization of copper tubes with floating plug by Elastic-plastic FEM method;
铜管游动芯头拉拔道次优化的弹塑性有限元模拟
On the stability of aluminium tube drawing with a floating plug;
铝管材游动芯头拉拔稳定性研究
According to the elastic-plastic theory, the calculation method of tangential stress , radial stress of expansion casing both in elastic deformation area and in plastic deformation area is deduced and the minimum critical load between expansion core and casing was determined.
根据弹塑性的理论,推导了膨胀套管在弹性变形区和塑性变形区的周向应力和径向应力计算模型,确定了膨胀套管膨胀时在膨胀芯头与套管之间所需的最小接触载荷。
This paper introduces the method of making sand core,explains the influence of the head design of sand core,assembly of sand core and other factors on the dimension precision of casting.
介绍了制芯方法,阐述了芯头设计、砂芯的组装及其它因素对铸件尺寸精度的影响。
RESEARCH AND CALCULATION OF THE FIXED SHORT CORE DRAWING FORCE
固定短芯头拔制时拔制力的计算研究
Countersunk head drive rivets
GB/T15855.2-1995沉头击芯铆钉
Flat round head drive rivets
GB/T15855.1-1995扁圆头击芯铆钉
120 deg flush head break mandrel blind rivets
GB/T12617-1990开口型沉头抽芯铆钉
Mushroom head break mandrel blind rivets
GB/T12618-1990开口型扁圆头抽芯铆钉
hollow cut velveteen
凸条灯芯绒（各行绒头有高低）
Making and application of soaking container for inward transfixion pin
内芯穿刺针头浸泡罐的制作与应用
Ferrite cores for AC erasing heads
GB/T11435-1989铁氧体交流消音头磁芯
so every so often a sample is obtained with a coring bit.
因此时常要用取芯钻头取样。
Key words: hose-connect、 injection mould、 take off whorl、 side core.
关键词：软管接头、射模、螺纹、向抽芯.
The down of the eider duck, used as stuffing for quilts and pillows.
羽绒绒鸭毛，用作被子和枕头的芯子
120 deg flush head break mandrel closed end blind rivets
GB/T12616-1990封闭型沉头抽芯铆钉
Mushroom head break mandrel closed end blind rivets
GB/T12615-1990封闭型扁圆头抽芯铆钉
Computer Aided Design of Blown Film Die with Spiral Spreader
螺旋芯棒薄膜机头的计算机辅助设计
Simulation and Analysis of Flow Field in Spiral Mandrel Blown-Film Die;
螺旋芯棒式吹膜机头流场的模拟分析
Improvement of Steel Wire Rope Core Belt Lacing Lap Joint Craftwork
钢丝绳芯输送带接头搭接工艺的改进
Design on Time Monitoring and Measuring System of Steel Cable Belt Connector
钢绳芯输送带接头实时监测系统设计
Study on drill bit for large diameter core drilling of deep hole in hard rock
硬岩深孔大口径取芯钻进的钻头研究