The Property and Formation of the Plastic Hinge in Rotary Forging and Upsetting Process of Ring Billet Cutting and Precision Form of Helical Vane of Shearer Drum
摆辗镦粗工艺过程中塑性铰形成与特性研究采煤机滚筒螺旋叶片的下料及辗压成形
Through analyzing the structure shape and size of the hollow sucker rods tube forging, the ring valley and fold formed at flange and the right shape in hexagon was not gained easily during upsetting.
分析了空心抽油杆锻件的形状和尺寸，镦粗时易在法兰部位产生内凹和折叠，方部不易成形。
The Method of Upsetting Short Steel Ring in Hot State for Measuring the Blow Energy of Hammer
用钢质短圆环热镦粗法测定锻锤打击能量
When the ratio of upsetting of tubular blank was very large, the ring valley formed at inner wall and the fold formed at last.
采用大镦锻比对管坯端部镦粗时容易发生轴向失稳，在管坯的内壁形成环形内凹，最终可形成折叠。
The experiments of cylinder upsetting and ring hydrostatic compression were conducted. The results show that symmetrical pressure cannot change the figure of compression specimens, but the forming limit was extended.
进行了圆柱和圆环的充液压缩试验，压缩试验结果表明：均匀静液压力对压缩试件的形状变化没有影响，但可提高成形极限。