Gapping Factor Analysis of Heavy Hydraulic Press with Whole Pre-Tightening Assembled Frame

Abstract:

Whole pre-tightening assembled frame with multi tension bolts, the main form of heavy hydraulic press, will gap at the junctions of upper beam and columns when it is subjected to allowable loads, which has great influence on stability of assembled frame and processing quality of forgeable piece. A model of assembled frame with 10 tension bolts was built to research the effect of residual pretension coefficient, relative stiffness coefficient and distribution of tension bolts on gapping by means of numerical simulation. Relative gapping coefficient and relative potential gapping coefficient were introduced to measure the extent of gapping. Our studies indicated that residual pretension coefficient was the most important influence factor, while distribution of tension bolts had little influence on extent of gap.

• Periodical: Applied Mechanics and Materials (Volumes 44-47)
• Pages: 1833-1837
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.44-47.1833
• Online since: December 2010
• Authors: Zhi Dong Duan, Jian Jun Wu
• Keywords: Assembled Frame, Finite Element Analysis (FEA), GaP, Hydraulic Press, Pretightening Force

References

[1] Wu Shengfu, Nie Shaomin, Jin Miao, Song Qingyu. Overall Worjing Performance Analysis of Fully Pretightened Frame[J]. Journal of Yanshan University (in Chinese), 2006, 30(2): 143-146.

[2] Wu Shengfu, Jin Miao, Nie Shaomin, Song Qingyu. The integration property of heavy forge hydraulic-press and its influence factors [J]. Journal of Plasticity Engineering (in Chinese), 2006, 13(2): 110-113.

[3] Duan Zhidong, Su tieming. Finite element analysis of pre-stressed frame based on generalized modular design [J]. FORGING & STAMPING TECHNOLOGY (in Chinese), 2009, 34(2): 74-78.

[4] Yanshen Xu, Yongliang Chen, Qianli Xu, Liang Hou. Generalized Modular Design Method for Durable Product Customization. Proceeding of the 11th World Congress in Mechanism and Machine Science, April 1-4, 2004, Tianjin, China.

[5] Duan Zhidong, Su tieming. Analysis of Deformation of Assembled Frame and the Pretension of Tension Bolts[J]. Mechanical Science and Technology for Aerospace Engineering(in chinese). 2009, 170(4): 450-454.