Design of a Test Part for Verification and Validation of a Three Linear Axes Machine Tool

IF 1 Q3 ENGINEERING, MULTIDISCIPLINARY
Sergio Aguado Jiménez, Laura Lorente, José Antonio Albajez, Jesús Velázquez, Jorge Santolaria Mazo
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Abstract

On traditional manufacturing systems such as machine tools (MTs), the increase on their operational capacity goes hand in hand with the improvement of its efficiency and accuracy. To do that, there are two types of verification methods, direct and indirect methods. The main aim of this job is to develop a test part to machine that allows determine the influence of the geometric errors of a three linear axes MT using volumetric and geometric methods. When the test part is machined, all axes of the machine are moved simultaneously. So, the difference between machined and test part design are, among others, the results of MT geometric errors. These errors can be reduced using volumetric verification techniques and MT compensation. Moreover, a proper test part design provides a work piece than can be used as a reference artefact for MT calibration. Nominal data of the test part can be obtained using a coordinate measurement machine. So, if the MT measures the machined test part using a probe, the difference between real and nominal coordinates could be used to obtain MT geometric errors. Therefore, the test part has to be designed to allow an easy data capture of the MT; taking into consideration the different kinematic models used to improve its accuracy. The new test part developed consist of a rectangular block with grooves and battlements on its external faces and an internal pyramidal structure. In addition, a series of conical holes are strategically located along the surface to improve data capture and errors identification. Synthetic tests show that this test-part design provides good results using volumetric and geometric techniques.
三直线轴机床验证试验件的设计
在机床等传统制造系统中,其操作能力的提高与效率和精度的提高密切相关。要做到这一点,有两种验证方法,直接和间接的方法。这项工作的主要目的是开发一个测试部件,允许使用体积和几何方法确定三线性轴MT的几何误差的影响。当被试件被加工时,机床的所有轴都是同时运动的。因此,机械加工和测试零件设计的差异,除其他外,是MT几何误差的结果。这些误差可以通过体积验证技术和MT补偿来减少。此外,适当的测试零件设计提供了一个工件,可以作为MT校准的参考工件。用三坐标测量机可以得到被试零件的标称数据。因此,如果MT使用探针测量加工后的测试部件,则可以使用实坐标与标称坐标之间的差值来获得MT的几何误差。因此,测试部分必须设计成允许MT的简单数据捕获;考虑到不同的运动模型的使用,提高了其精度。开发的新测试部件由一个矩形块和一个内部金字塔结构组成,矩形块的外表面有凹槽和隔板。此外,一系列锥形孔沿着表面策略性地定位,以提高数据捕获和错误识别。综合试验表明,采用体积学和几何技术设计的试验件具有良好的效果。
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来源期刊
Advances in Science and Technology-Research Journal
Advances in Science and Technology-Research Journal ENGINEERING, MULTIDISCIPLINARY-
CiteScore
1.60
自引率
27.30%
发文量
152
审稿时长
8 weeks
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