Young Researcher Paper Award 2021

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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
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Impact of Improved Wire Tension Stability on Wire Electrical Discharge Machining Precision

Pi-Wen Wang and Chao-Lun Liu

(Received March 29, 2022; Accepted June 13, 2022)

Keywords: WEDM, wire transport system, wire tension, straightness

We propose a system dynamic approach for improving the stability of wire electrical discharge machining (WEDM). The approach includes wire spool inertia isolation and a damped sandwich mechanism, which increase the fundamental frequency and damping coefficient of the system, respectively. Thus, the wire tension stability is also improved. We establish a dynamic model to simulate the dynamic behavior of the wire transport system. Then the wire tension stability is optimized through tuning the damping material parameters of the damped sandwich mechanism. The mechanism was mounted on a commercial WEDM machine to show the benefits in terms of wire tension and machining precision. Results show that the maximum overshoot of wire tension was reduced by 51% and the steady-state wire tension variation was improved from 176 to 48 gf. When cutting 10-cm-thick SKD11 tool steel, the deviation from a straight line was reduced by 45%.

Corresponding author: Pi-Wen Wang

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