锻压技术

短行程全预紧组合框架结构内高压成形机强度与刚度分析

英文标题：Analysis on strength and stiffness of high pressure hydro-forming press with short stroke and fully pre-stressed assembled frame

作者：张伟玮1 2 王小松1 2 高贵麟3 张洪丰3 苑世剑1 2

单位：1.哈尔滨工业大学 .哈尔滨工业大学金属精密热加工国家级重点实验室 3.一汽轿车股份有限公司

关键词：内高压成形机全预紧组合框架液压机

分类号：

出版年,卷(期):页码：2015,40(10):82-87

摘要：

短行程内高压成形机具有合模速度快、主缸行程小、快速建立合模力和生产效率高等优点。为了降低应力的脉动幅值，提高机架的疲劳寿命并保证内高压成形件的精度，短行程内高压成形机的本体结构采用预应力组合框架结构。因此首先通过传统材料力学的方法，对承载横梁进行强度和刚度的理论校核，横梁的最大主应力和最大变形挠度均在许用范围内。通过数值模拟，分析了满载时机身的应力分布、变形挠度、立柱的横向相对偏移量以及横梁与立柱接合面的形态。结果表明:机身的等效应力不超过100 MPa，最大变形挠度为0.184 mm·m-1，立柱横向偏移量为0.49 mm，最大纵向缝隙为0.02 mm。机身结构的强度和刚度均符合设计要求。

The main advantages of short stroke and high pressure hydro-forming press are higher die-closed speed, shorter main cylinder stroke, shorter establishment time of clamping force and higher production efficiency. In order to decrease the pulsation stress amplitude, enhance the fatigue life and ensure high pressure forming precision of hydro-formed parts, a fully pre-stressed assembled frame structure was used in the structural design of short stroke hydro-forming press. By traditional materials mechanics method, the strength and stiffness of the press crown were checked, and the maximum main stress and the maximum deflection were within the allowable range. Furtherly, the stress distribution and deflection of press body, relative transverse displacement of the column and the shape of joint surface between press crown and column were analyzed by the numerical simulation. The result shows that the equivalent stress of press body is less than 100 MPa, the maximum deflection of press crown is 0.184 mm·m-1, the transverse displacement of column is 0.49 mm, and the maximum vertical displacement between press crown and column is 0.02 mm. Both the strength and the stiffness are within the acceptable range.

基金项目：

国家科技重大专项“高档数控机床与基础制造装备”(2011ZX04001-011)

张伟玮（1985-），男，博士研究生

参考文献：

[1]苑世剑. 现代液压成形技术[M]. 北京：国防工业出版社, 2009.

Yuan S J. Modern Hydro-forming Technology[M]. Beijing:National Defense Industry Press，2009.

[2]Altan T,Tekkaya E. Sheet Metal Forming-Fundamentals[M]. Ohio:ASM International, 2012.

[3]Schuler. GmbH . Metal Forming Handbook[M]. Berlin: Springer Verlag, 1998.

[4]张华，杨固川，胡孟君，等. 800 MN大型模锻压机测试分析研究[J].锻压技术，2014，39（3）：90-93.

Zhang H, Yang G C, Hu M J, et al. Study on analysis of test＆measurement for 800 MN die-closed forging press[J]. Forging & Stamping Technology, 2014，39（3）：90-93.

[5]颜永年，荆红，俞新陆,等. 超重型液压缸的科学技术价值和工程应用[J].锻压技术，2013，38（1）：1-8.

Yan Y N, Jing H, Yu X L, et al. Science technology value and engineering application of super heavy hydraulic cylinder[]. Forging & Stamping Technology, 2013，38（1）：1-8.

[6]俞新陆. 液压机设计与应用[M]. 北京：机械工业出版社, 2009.

Yu X L. Design and Application of Hydraulic Press[M]. Beijing:China Machine Press， 2009.

[7]颜永年, 俞新陆. 机械设计中的预应力结构[M]. 北京: 机械工业出版社, 1989.

Yan Y N，Yu X L. Pre-stressed Structure in Mechanical Design [M]. Beijing:China Machine Press，1989.

[8]吴生富. 150 MN锻造液压机[M]. 北京：国防工业出版社, 2012.

Wu S F. 150 MN Forging Press[M]. Beijing:National Defense Industry Press， 2012.

[9]金淼，董晓传，沙心勇. 全预紧组合结构液压机临界预紧力的分析与计算[J].燕山大学学报，2012，36（5）：383-387.

Jin M, Dong X C, Sha X Y. Analysis and calculation of critical pr e-tightening force for fully pre-tightened assembled hydraulic press[J]. Journal of Yanshan University, 2012, 36(5): 383-387.

服务与反馈：

【文章下载】【加入收藏】