Transactions of Materials and Heat Treatment

Title：Forming,variation and control on spiral trajectory of rocker of rotary forging machines with double eccentric sleeve transmission

Authors： Gong Xiaotao Geng Pei Zhang Xue

Unit： Xi′an Aeronautical Polytechnic Institute Xi′an Jiaotao University Chongqing Wuyi Senior Technical School

KeyWords： rotary rolling rocker double eccentric sleeve spiral trajectory

ClassificationCode：TG335

year,vol(issue):pagenumber：2016,41(9):158-160

Abstract：

For the structural characteristics of rocker of rotary forging, a vector motion model was

designed for inner and outer double eccentric sleeve, and the motion trajectory of double

eccentric sleeve with different speeds and the same direction was simulated by Matlab

software. When the outer eccentric sleeve speed ω1>0 and the inner eccentric sleeve speed

ω2>0, as well as ω1≠ω2, the motion trajectory of rocker of rotary forging machine was a

helical curve. Furthermore, the forming law of helix space curve during a cycle was expounded,

and the parameters influencing helix were analyzed. The results show that the starting point

of helix locates at (2R,0), and the motion cycle is 2π. Thus, at the moment of 0-π,the

center point of rocker shaft end moves backwards to the center of axis gradually and rises

spirally, while at the moment of π-2π,the center point of rocker shaft moves towards to the

center of axis gradually and rises spirally. The spin number of the helix is the difference

between the numerator and denominator of the proper fraction of β or 1/β. The smaller is β

or 1/β, the less is the overlap, but when the β or 1/β is closer to 1, the more is the

overlap.

Funds：

陕西省教育厅科研计划项目（16JK1401）；西安航空职业技术学院2016～2017年度自选教科研计划项目（16XHKY017）

龚小涛（1983-），男，博士研究生，讲师

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