IJE TRANSACTIONS A: Basics Vol. 31, No. 10 (October 2018) 1760-1766   

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S. S. Patel and J. M. Prajapati
( Received: March 19, 2018 – Accepted in Revised Form: August 17, 2018 )

Abstract    Wire electric discharge machine (WEDM) is spark erosion in unconventional machining technique to cut hard and the conductive material with a wire as an electrode. The blanking die material SKD 11 is a high carbon and high chromium tool steel with high hardness and high wearing resistance property. This tool steel has broad application in press tools and dies making industries. In this research study the behavior of six process parameters includes Ton (pulse on time), Toff (pulse off time), IP (peak current), SV (servo voltage), WF (wire feed rate) and WT (wire tension) base on design of experiment method during WEDM of SKD 11 were experimentally studied. The 0.25 mm diameter of the brass wire has used as the electrode to cut the work piece. The surface roughness and kerf width are selected as performance measurement. Response Surface methodology (RSM) is utilized for process optimization as well as for formulating regression model for correlating process parameters with performance measurements.


Keywords    Wire Electric Discharge Machine, SKD 11, Tool Steel, Response Surface Methodology, Surface Roughness, Kerf Width



دستگاه تخلیه الکتریکی سیم (WEDM)، فرسایش جرقه در روش ماشینکاری غیر متعارف است تا مواد سختی و رسانایی را با یک سیم به عنوان یک الکترود برش دهد. مواد خام SKD 11 فولاد ابزار کربن بالا و کروم بالا با سختی و مقاومت بالا مقاومت در برابر سایش را دارد. این فولاد ابزار کاربرد گسترده ای در ابزارهای پرس و صنایع رنگرزی دارد. در این تحقیق، رفتار شش پارامتر فرآیند شامل Ton (پالس در زمان)، Toff (زمان خاموش شدن پالس)، IP (جریان پیک)، SV (ولتاژ سروو)، WF (نرخ انتقال سیم) و WT (پایه سیم) در طراحی روش آزمایش در طول WEDM SKD 11 مورد آزمایش قرار گرفت. قطر 0.25 میلیمتر سیم برنج به عنوان الکترود برای برش قطعه کار استفاده می شود. زبری سطح و عرض کربه به عنوان اندازه گیری عملکرد انتخاب می شوند. روش پاسخ سطحی (RSM) برای بهینه سازی فرایند و همچنین برای فرموله کردن مدل رگرسیون برای همبستگی پارامترهای فرایند با اندازه گیری های عملکرد استفاده می شود.


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