公差原则的应用.pdf

试验研究
文章编号:1672-0121(2011)05-0095-03
公差原则的应用
王娇
(衡阳财经职业技术学院,湖南衡阳421008)
摘要:讨论了零件互换性设计中不同公差原则的应用问题。指出根据零件的不同功能要求,选择最适合
的公差原则,以利于取得最佳的技术、经济效果。
关键词:机械制造;公差原则;应用;互换性
中分类号:TG801文就标识码:B
前言
2公差原则的应用
公差原则是尺寸公差与形位公差相互关系的原2.1独立原的应用
则,依据两者不同关系要求,将公差原则又分为独立
独立原则指图样上给出的尺寸公差和形位公差
原则和相关原则,其中相关原则又分为最大实体原各自独立、彼此无关,分别满足各自要求的公差原则。
则、包容原则。设计人员在进行互换性设计时,首先
应用独立原则时,尽管对被测要素没有规定的
要根据给定的运动状态、载荷性质、材料强度和润滑理想边界,但其最大实体尺寸和横截頭内、轴向截面
条件等确定配合公差。在配合计算中,孔和轴的实际内各项形位公差的综合效应会自然形成极限作用边
尺寸公差、偏差直接影响间隙或过盈量的大小,但孔界。独立原则一般用于非配合面,如如退刀槽、倒角
或轴的形位误差对其影响也不容忽视
的结构尺寸和未注尺寸公差的要素;也用于对配合
性质没有要求的配合表面、或者形位误差对配合性
收稿日期:2011-06-21
质影响不大的场合
作者简介:王曼娇(1970-),女,副救授,从事机械设计的教学与研究
(1)对于尺寸公差和形状公差需要分别满足要
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[8]张海明,蔡中义,李明晢板材多点成形回弹补偿与控制的方法
状锻压装备与制造技术,2009,44(3):18-21.
研究.塑性工程学报,2007,14(3)
1]胡世光,陈鹤嶛板料冷压成形原理M!北京:国防工业出版社,
[9于静泊,王卫卫,贾彬彬力一位移分控多点成形球回弹的数
1989:58.
值模拟煤矿机.200,03(3):61-63
112] Hill RA Theory of the Yielding and Plastic Flow of Anisot
[1]叶玉刚,薛勇,畏江年板料成形回弹模拟及补偿技术研究现
Metals. Roy. Soc.London Proc., 1948
Numerical simulation on the multi-point forming of cylindrical surfaces under
force-displacement separated control
CUI Aiai, WANG Weiwei, CHEN Ze, YU Jingbo
(Harbin Institute of Technology at Weihai, Weihai 264209, Shandong China)
Abstract: Because of lack of restrain along the thickness direction which leads to forming defects in multi
point forming, a new method which can improve the forming quality of multi-point farming process has been studie
in the text. The forming mode named force-displacement separated control has been proposed. The reason to improve
the forming quality under the new forming mode has been discussed and the approach to realize this forming method /3
has been proposed. Numerical simulation method has been adopted to study the springback of cylindrical surfaces
with different radii, different thicknesses and forming forces. The study indicates that better forming quality and i
forming results can be acquired by the method of force-displacement separated control. The springback ratio
decreases with the increase of the forming force, the thickness and the curvature
Keywords Multi-point forming; Force-displacement separated control; Numerical simulation
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