Assessment of measurement uncertainties for energy signals stimulating the selected NiTi alloys during the wire electrical discharge machining

• Published in: Precision engineering Vol. 76; pp. 133 - 140
• Main Authors: Kowalczyk, Małgorzata, Tomczyk, Krzysztof
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.07.2022
• Subjects: Energy signals; Measurement uncertaintiesy assessment; Measurement uncertainty; Wire electrical discharge machining; Wire electrical discharge machining; Measurement uncertainty; Measurement uncertaintiesy assessment; Energy signals
• ISSN: 0141-6359; 1873-2372
• DOI: 10.1016/j.precisioneng.2022.03.005

In this paper, we present the assessment of measurement uncertainties in the wire electrical discharge machining (WEDM). The type A, type B, and total uncertainties are considered when measurement of the voltage and current for the WEDM is carried out, whereas for both the correlated and uncorrelated energy measurements, the corresponding complex and relative uncertainties are determined. Therefore, the procedure proposed in the paper allows for the accurate fulfillment of measurements in the field of the WEDM. Hence, the main purpose of this paper is to determine the influence of uncertainties related measurement data obtained during the WEDM on the surface condition. The second and third sections of this paper present the basics of the WEDM and the materials used during its implementation. The fourth chapter presents the mathematical basis for the evaluation of the WEDM uncertainty, while the fifth chapter deals with the implementation of exemplary calculations and the evaluation of uncertainties occurring during this type of machining. The procedure proposed in this paper can be used for both theoretical calculations and practical implementations used within the WEDM, with particular emphasis on the assessment of the impact of single impulse energy, current, and voltage amplitude on the WEDM process, as well as the surface condition after machining of NiTi alloy. •Wire electrical discharge machining.•Uncertainty assessment.•Measurement uncertainty.•NiTi Alloys.