一面两销无间隙定位方法的研究

吴盘龙; 胡东方

doi:10.13433/j.cnki.1003-8728.20190297

一面两销无间隙定位方法的研究

doi: 10.13433/j.cnki.1003-8728.20190297

吴盘龙^{1, 2,},
胡东方^{1, 2, ,}

1.
河南科技大学机电工程学院, 河南洛阳 471003
2.
机械装备先进制造河南省协同创新中心, 河南洛阳 471003

基金项目:

国家自然科学基金项目 51775172

洛阳市重大科技专项项目 1801006A

详细信息

作者简介:
吴盘龙(1992-), 硕士研究生, 研究方向为无间隙定位理论研究及应用, wpl@stu.haust.edu.cn

通讯作者:
胡东方, 副教授, 硕士生导师, hdf@haust.edu.cn

中图分类号: TG156
计量
- 文章访问数: 202
- HTML全文浏览量: 104
- PDF下载量: 20
- 被引次数: 0
出版历程
- 收稿日期: 2019-07-05
- 刊出日期: 2020-11-01

Research of Location Method for One Plane and Two Pins Without Clearance

Wu Panlong^{1, 2
,},
Hu Dongfang^{1, 2
, ,}

1.
School of Mechatronics Engineering, Henan University of Science and Technology, He'nan Luoyang 471003, China
2.
Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province, He'nan Luoyang 471003, China

摘要

摘要: 针对箱体、壳体类零件大批量生产中，由于采用的传统一面两销定位存在配合间隙，各工序无法达到完全基准统一，易造成产品质量不稳定的问题。提出了一种采用两个带挠性的多齿瓣圆柱销代替传统的圆柱销和菱形销的无间隙定位方法。通过最小二乘法寻找到定位销弹性齿瓣的最小弹性区间，定位孔中心距公差带只需满足在最小弹性区间内变化即可。利用定位销弹性齿瓣的回复力与定位孔自适应配合的方法消除销孔之间的配合间隙，实现定位基准统一。数值仿真计算验证了提出的无间隙定位方法的有效性。
- 无间隙定位 /
- 最小二乘法 /
- 定位销弹性齿瓣 /
- 定位基准统一
Abstract: In the mass production of box and monoblock parts, due to the clearance between the traditional location of one plane and two pins. The complete unification of datum of each process cannot be reached, which easily causes the problem of unstable product quality. A new clearance-free location method with two elastic multi-tooth cylindrical pins instead of traditional cylindrical pins and diamond pins is proposed. The elastic interval of the teeth of the locating pin is searched by the least square method, then tolerance zone of the center distance of the locating hole only satisfies to the elastic minimum interval. The clearance between the pin and the hole is eliminated through self-adaptive fitting relied the resilience of elastic teeth of location pin, consequently the real unification of location datum of each process is realized. Ultimately, the validity of the present clearance-free location method is verified via numerical simulation.
- clearance-free location /
- least square method /
- elastic teeth of location pin /
- unification of location datum

HTML全文

图 1 发生装配干涉一面两销

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图 2 一面两圆柱销无间隙定位方式

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图 3 定位销的齿瓣弹性变化区间

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图 4 定位销弹性变化区间目标函数(a, b已知)

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图 5 定位销弹性变化区间目标函数(s, t已知)

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表 1 孔中心距公差最大公差带对应定位销最小弹性带

定位孔公称直径∅/mm	定位孔设计尺寸/mm	定位销弹性齿瓣数/个	定位销最小弹性带值/mm
16	100~200±0.04	7~9	0.085 41
16	200~400±0.05	9~11	0.112 23
16	400~600±0.03	11~13	0.066 24
16	600~800±0.05	13~15	0.113 25

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表 2 定位销部分采样截面坐标数据 mm

x	y	z
14.406	15.223	1.532
15.586	-14.987	1.458
-15.003	-15.621	1.372
-15.322	14.853	1.567
16.012	16.218	2.567
15.154	-15.539	2.939
-15.632	-14.635	3.162
-15.267	13.225	3.243
15.814	14.905	4.450
15.157	-15.970	4.648
-15.655	-15.035	4.560
-15.706	15.031	4.565
15.438	15.823	5.862
15.276	-14.655	6.155
-14.751	-14.959	6.154
-16.154	15.386	5.992
15.957	14.546	7.302
-14.915	15.034	7.592
-15.317	-15.754	7.316
-14.585	14.223	7.565
-16.223	-15.489	9.328
-15.544	-14.823	9.287
-16.149	-15.340	9.298
-15.387	14.229	9.007
15.934	15.917	10.314
15.106	-14.243	10.554
-14.961	-16.129	10.525
-15.825	15.654	10.618
15.868	15.748	12.295
15.579	-14.100	12.041
-15.145	-15.442	11.904
-16.243	15.785	12.115
15.422	14.986	13.523
15.631	-16.325	13.498
-15.558	-15.698	13.558
-14.953	16.259	13.674
16.543	15.723	15.002
15.863	-15.957	15.124
-15.216	-15.873	15.546
-15.774	15.413	15.245

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