摘要
为了保证列车行驶的安全性,国家规定每四年必须对车架进行一次大修。大修时要将悬挂刹车装置的旧耐磨套换成新的。由于耐磨套与吊耳之间是过盈配合,且吊耳又分布在车架的各个角落,十分不利于机械化操作。目前国内还没有解决好耐磨套的装卸问题。传统的方法不仅操作工人的劳动量大,工作效率低,而且有可能引起事故隐患。
本文通过分析206、209型号车架的吊耳分布特性、耐磨套与吊耳间过盈配合的特点以及装配过程对设备的约束条件,提出一套不同于传统方法的解决方案,并研制出智能型的装、退套机。它不仅消除了传统做法的弊端,减轻了工人的劳动强度,提高了工作效率,还能针对所装套的过松、过紧等不合格情况,给予不同的报警,弥补了国内在这方面的空白。
本文做的主要工作是:1)、提出了装、退套机的基本结构;2)、利用三维参数化设计软件PRO/ENGINEER2001,实现了装、退套机的实体建模,结合大型有限元分析(FEA)软件ANSYS对装、退套机的关键受力部件进行了网格线划分和受力分析,确保推力主轴和C型夹具在工作过程中拥有的足够强度。3)、利用了ANSYS 8.0自带的OPT(优化技术)对C型夹具进行了结构上的优化,实现了一定强度和刚度的条件下,C型夹具的质量最小,使装、退套机的质量得到了改善,结构更趋于合理化;4)、根据合金套和吊耳的过盈配合关系,应用弹塑性力学中的两个简单厚臂圆筒理论及第四强度理论,结合轴套装配方案特性,在C++ Builder平台上开发出了过盈配合装配力的求解器,它能求解出所有过盈配合所需装配力,并将各种配合尺寸和过盈量的数据库存化,以便将来调用。过盈配合所求解出的装配力,在理论上可作为判断松、紧套的依据。实际操作中只须输入车架的型号和耐磨套的尺寸,即可直接查到相应的装配力的最大值和最小值,系统根据这个最大值和最小值,就能有效、及时的在装配过程中实现相应的报警,基本实现了装、退套过程的智能化。
In order to be insured the safety of driving of train , the nation has prescribed that the frame of the train must be repaired completely every four years. When being repaired the old resist grind bushings must be exchanged to new ones. Because there is a relation of the tight fitting between the resist grind bushing and suspension yoke, and the suspension yokes distribute many corner in the frame, which make against to work by machine. Now there are not special device to preferably finishing load and unload of resist grind bushing o The tradition method not only may kill great work and low work efficiency but also may cause accident hidden trouble.
By analyzing the suspension yokes' distributing characteristic in the train frame of 206 and 209 type the peculiarity between the resist grind bushings and the suspension yokes and restriction condition of device during the process of assemble, it puts forward a different project from tradition's. Furthermore, it designs an intelligent Machine with loading and unloading Bushing. This machine has not only eliminate the tradition method's shortcoming lightening the workers" labor intensity and enhancing work efficiency, but also gives different alarm by the disqualification such as over loose or over lighted. It has made up the blank in aspect in our nation.
The main work of this article: firstly, bring forward the basic structure of machine with loading and unloading bushing; secondly, use 3D parameter design software Pro/Engineer 2001 to realize entity-modeling of machine with loading and unloading bushing. It uses the great software FEA ANSYS, analyzing the strength and mesh according to the main part of component, making sure of the main push axis and C-type clamp should have enough intension during the process of working; thirdly, by using the OPT technology of ANSYS 8.0, it realizes optimization on its structure and realize the minimize quality of C-type clamp under some intensity and pressure. The quality of machine with loading and unloading bushing has been improved and the structure of which has been
turned rationalization; fourthly, According to the relation of the tight fitting between resist grind bushing and suspension yoke, making use of the two simple thick circles theory in the elastic-plastic mechanics and the fourth strength theory, it integrated theory with it's formulation characteristic and developed the solver of the tight fitting force in the system of C++ Builder .It could realize the solve of all tight fit force and save up the frame's size and the tight fitting's data in database in order to use in the future ?The assemble force of tight fitting can be used as the rule of estimating loose or tight bushing in theory. Actually, we only input the type of the frame and the size of the resist grind bushing in operation; we can immediately find the counterpart data of the assemble force - the maximum and the minimum. The system will can availably give a relevant alarm about the force of the assemble process in time according to the maximum and the minimum. It can realize intelligence during the process of loading and unloading bushing.
引文
1.吴明祥 郑望林《奥氏体—贝氏体合金球铁树板的生产及应用》适用技术市场 1997年第10期5~6页
2 崔忠坊,金属学与热处理.北京:机撤工业出伍社,1989.
3.魏生民主编 《机械CAD/CAM》 武汉理工大学出版社 2001.9
4.曹志奎 黄瑞清 《机械CAD技术基础》 上海交通大学出版社 1996.5
5.孙菊芳,荣王伍 有限元法及其应用 北京航空航天大学出版社.1990 7
6.钱华山 CAD/CAM 计算机辅助设计与制造 2001 ③:3-4
7.龚曙光 主编 邱爱红 姜根发等编著 《ANSYS 工程应用实例解析》 北京:机械工业出版社,2003.4:
8.雷晓燕 有限元法 中国铁道出版社 2000;
9.蓝宇,张连杰 大型有限元分析软件 ANSYS应用科技 2000⑥:11 12
10.陈精一 蔡国忠编著 《ANSYS使用指南》中国铁道出版社 2001.4
11.洪庆章 刘清吉 编著 《ANSYS教学范例》 中国铁道出版社 2002年5月第1版
12.易日 编著 《使用ANSYS 6.1进行结构力学分析》 北京:北京大学出版社 2002.11
13.龚曙光 主编 邱爱红 姜根发等编著 《ANSYS 基础应用及范例解析》 北京:机械工业出版社 2003.1
14. IMAM.M.H. Three-dimensional Shape Optimization[J]. Int. J. Numer. Meth. Engng. 1982,18:661--673
15. VANDERPLAATS. G.N. Structural Optimization[J]. Int. J. Numer. Meth Engrg. 1982,20(7):992--999
16. DING Yun-liang. Shape Optimization of Structures:a Literature Survey[J]. Comput&Struct. 1986,24(6):985--1004
17. BARTHELEMY J.F.M. Approximation Concepts for Optimum Structural Design----A Review [J]. Structural Optimization 1993⑤:129~144
18. RAMANA Grandhi. Structural Optimization with Frequency Constraints-A Review[J]. AIAA Journal. 1993,31(12): 2296~2302
19. ARORAIS, HUANG. M.W. Methods for Optimization of Nonlinear
Problems with Discrete Variables-A Review[J].Structural Optimization. 1994,(8): 69--85
20. SEYRANIAN A P, LLJNDE OLIOFFN Miltiple Eigenvalues in Structural Optimization Problems [J]. Structural Optimization 1994, & 207~227
21. MINS, NISHIWAKIS KIKLTCIIIN Unified Topology Design of Static and Vibrating Structures using Multi-objectice Optimization[J]. Structural Optimization 2000, 75 93-116
22. Tyler E Bruns Daniel A Tortorelli. Topology Optimization of Non-Linear Elastic Structures and Compliant Mechanisms[J] .Compute Meth Apply Mech Engrg 2001, 190 3445~3459
23. Diaza, Kikuchin Solutions to Shape and Topology Eigenvalue Optimization Problems using a Hmmgenization Method[J] .Int J Num Meths Engrg 1992 35:1487-1502
24. Xie Y M Steven G P A Simple Approach to Structural Frequency Optimization [J]. Comput&Struct 1994, 53 (6):1487~1491
25.傅衣铭,罗松南,熊慧而编著《弹塑性理论》湖南大学出版社,1996
26.王步瀛 机械零件强度计算的理论和方法[M] 北京:高等教育出版社,1989;
27.俞汉清,李晓沛,赵秉厚等 编著《公差与配合过盈配合计算和选用指南》中国标准出版社,1990.9
28.郑凤琴 过盈配合设计中的可靠性分析 南京建筑工程学院学报1996年 第1期
29.顾志荣,吴永生编著 《材料力学》上海:同济大学出版社,1990.10
30.扶名福,江五贵 杨德品 李相麟 圆柱中厚壳弹塑性有限变形屈曲分析计算 华东交通大学学报 第18卷 第3期 2001.6
31.张益三 黄圣洁编著 《PRO/E入门基础功能剖析》 机械工业出版社 2001.4
32.苏厚合 黄俊贤等 《Pro/ENGINEER 2000i2快速入门指导》中国铁道出版社 2001.4
33.[美]Bill Burchard 《Auto CAD 2000从入门到精通(Inside AutoCAD 2000)》北京希望电子出版社 2000年5月
34.夏海旭 彭世明 张显宗 《AutoCAD2000中文版教程》人民邮电出版社 2000年6月
35. ANSYS INC. ANSYS Modeling and Meshing Guide. 1998.6
36. D.h. Norrie. G. de Vries, The Finite Element Method. Fundamentals andApplication. 1973,2(3): 32-38
37. Weaver, William. Finite Elements for Structural Anlysis. Prentice-Hall, 1984
38. Holt A W, Ramsey H R, etc. Coordination System Technology as the Basis for a Programming Environment[J]. Electrical Communication, 1983,57(4):307~314
39. A.B.O. Uetikon-Zuerich :Trans 《Probabilistic methods in fatigue and fracture / Soboyejo》 Tech Publications Lid, c2001, viii, 2001
40. Yuan, J.X. Identification of the Machine Tool Structural Parameters by Dynamic Data System(DDS) and Finite Element Method. Ph.D. Thesis, University of Wisconsin-Madison. 1998
41. VANDERPLAATS. G.N. Structural Optimization[J]. Int.J. Numer. Meth Engng. 1982,20(7):992--999
42.赵汝嘉 朱家诚 叶方涛主编 数字化手册编委会编 《机械设计手册(软件版)R2.0》 机械工业出版社 2003
43.黄安南_王晓澎 等编著 《机床微型计算机控制系统》 电子工业出版社 1988年6月
44.陈立周 工程随机变量优化设计方法-原理与应用 科学出版社,1997
45.曾昭华,傅祥志著 《优化设计》 北京:机械工业出版社,1992.
46.高健编著 《机械优化设计基础》 北京:科技出版社 2000
47.李柱 《互换性与技术测量》 武汉:华中理工大学出版社,1988
48.沈火生,沈德廉,张旭初,中国机械工程学会等 《中国机械设计大典》 江西科学技术出版社 2001.2