主办：陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊：1976年
汽车实用技术

汽车实用技术 ›› 2022, Vol. 47 ›› Issue (15): 131-133.DOI: 10.16638/j.cnki.1671-7988.2022.015.026

• 测试试验 • 上一篇    

无基准的孔组位置度三坐标测量模型

张龙岗，史鑫鹏，赵 岩，王 琳，林勃勃   

  1. 陕西重型汽车有限公司 质量管理部
  • 出版日期:2022-08-15 发布日期:2022-08-15
  • 通讯作者: 张龙岗
  • 作者简介:张龙岗（1984—），男，工程师，研究方向为计量检测，E-mail:zhanglonggang@sxqc.com。

CMM Model of Hole Group Position without Datum

ZHANG Longgang, SHI Xinpeng, ZHAO Yan, WANG Lin, LIN Bobo   

  1. Quality Control Department, Shaanxi Heavy Duty Automobile Company Limited
  • Online:2022-08-15 Published:2022-08-15
  • Contact: ZHANG Longgang

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摘要： 零件上孔组位置度的标注有时会出现无基准的情况，这虽然符合国标的要求，但却往 往引起测量人员与设计人员之间的分歧，导致评价不够准确。文章在最小二乘法的基础上， 给出了一种孔组位置度的理论计算模型，然后以某安装支架为例，用三坐标测量机进行了实 际的测量和评价，并与 PC-DMIS 软件的结果进行了对比，验证了该种无基准孔组位置度测量 评价模型的有效性。

关键词: 三坐标测量；位置度；最小二乘法；无基准的孔组；测量模型

Abstract: The marking of the hole group position degree on the part sometimes appears without a reference, which is in accordance with the requirements of GB/T, but often causes disagreement between the measurer and the designer, resulting in less accurate evaluation. In this paper, a theoretical calculation model of hole group position degree is given based on the least squares method, and then a mounting bracket is used as an example to carry out the actual measurement and evaluation with a CMM, and the results are compared with those of PC-DMIS software to verify the validity of this datum-free hole group position degree measurement and evaluation model.

Key words: CMM; Position degree; Least squares method; Hole group without datum; Measurement model