三次元座標測定機の精度に及ぼす温度環境の影響 : 室温の異なる環境における誤差分布の変化とその補正

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Thermally induced structural changes due to variations in the operating environment affect the measuring accuracy of three-dimensional coordinate measuring machine (CMM). The effects of temperature changes on the machine's structure and performance are very complex. It can often be difficult to find a complete relation between the change of error components of CMM and thermal effects because of the structural complexity of CMM. Various approaches have been taken by CMM manufacturers to cope with the problem of thermal error. One aim to compensate thermal effects is to guarantee the use of CMM not only in temperature controlled environments but also in workshop or workshop inspection area, where temperature variations are likely to be much greater. For the purpose of the compensation for thermal effects, it is necessary to have a clear grasp of the relation between changes of machine structure and temperature changes. In this paper the results of error component distribution measured in various thermal environments is shown and correction models to compensate the effects of temperature changes is proposed. The model assumes that the expansion/contraction of scales in each axis direction and the changes of squareness due to thermal changes are main causes of the changes in error components. Significant improvements in the accuracy of CMM can be achieved by the application of the proposed correction model.
一般社団法人日本機械学会の論文
1999-03-25

著者

大矢誠
新潟大学工学部

三次元座標測定機の精度に及ぼす温度環境の影響 : 室温の異なる環境における誤差分布の変化とその補正

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