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首页> 外文期刊>日本機械学会論文集. C編 >Thermal Effects on the Accuracy of Three-dimensional Coordinate Measuring Machine (Changes and its Compensation of Error Component Distribution in Various Thermal Environments)
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Thermal Effects on the Accuracy of Three-dimensional Coordinate Measuring Machine (Changes and its Compensation of Error Component Distribution in Various Thermal Environments)

机译：热对三维坐标测量机精度的影响（各种热环境下误差分量分布的变化及其补偿）

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摘要

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 expan- sion/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.
机译：由于操作环境的变化而产生的热致结构变化会影响三维坐标测量机（CMM）的测量精度。温度变化对机器结构和性能的影响非常复杂。由于CMM的结构复杂性，通常很难在CMM的误差分量变化和热效应之间找到完整的关系。坐标测量机制造商已采取各种方法来解决热误差问题。补偿热效应的一个目的是保证不仅在温度受控的环境中而且在温度变化可能更大的车间或车间检查区域中使用CMM。为了补偿热效应，必须清楚地了解机器结构变化和温度变化之间的关系。本文显示了在各种热环境下测量的误差分量分布的结果，并提出了补偿温度变化影响的校正模型。该模型假定比例尺在每个轴方向上的膨胀/收缩以及由于热变化引起的矩形度变化是误差分量变化的主要原因。通过使用建议的校正模型，可以实现CMM精度的显着提高。

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