پیش‌بینی و بهینه‌سازی مقدار سختی فولاد قالب در فرایند وایرکات مبتنی بر سیستم استنتاج فازی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده فنی مهندسی، دانشگاه ایلام، ایلام، ایران

2 دانشکده انرژی، دانشگاه صنعتی کرمانشاه، کرمانشاه، ایران

چکیده

قالبهای پرس‌کاری به دلیل سرعت بالای تولید در صنعت کاربرد زیادی دارند. به دلیل لقی بسیار کم بین سنبه و ماتریس و دارا بودن اشکال پیچیده، ساخت این قالبها بسیار گران و هزینه­بَر است. از سوی دیگر، به واسطه تماس مکرر سنبه و ماتریس با ورق و نیز سرعتِ بالای فرایند، می­بایست سختی قالب و متعاقباً عمر خستگی آنها بالا باشد. یکی از فرایندهایی که هم توان ایجاد سطوح با دقت ابعادی بالا و اشکال پیچیده را داراست و هم به واسطه ماهیت فرایند می­تواند منجر به افزایش سختی قالب شود فرایند وایرکات است. در این تحقیق، به منظور بهبود عملکرد و افزایش عمر قالب­های برش، سختی فولاد Mo40 بهینه­سازی می­شود. برای این منظور ابتدا بر اساس روش رویه پاسخ، طراحی آزمایش برای سه پارامتر سرعت تزریق سیم، کشش سیم و توان ژنراتور طراحی شده است. در ادامه داده­های به دست آمده خوشه­بندی شده و سپس قواعد فازی با سه ورودی (سرعت، کشش و توان) و خروجی (سختی) استخراج شده‌اند. قواعد به دست آمده در جعبه ابزار سیستم­های استنتاج فازی نرم­افزار متلب وارد شدند. بر اساس سیستم استنتاج فازی تعریف شده، امکان پیش­بینی سختی بر اساس پارامترهای سرعت سیم، کشش سیم و توان ژنراتور فراهم شده است. در فاز بعدی، بر اساس این سیستم و در محدوده متغیرهای موجود، مقدار بهینه سختی و متغیرهای متناظر استخراج گردید. در نهایت این مقادیر به صورت تجربی تست گردید و تطابق آن با مقدار به دست آمده مشاهده گردید.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Prediction and Optimization of Mold Steel Hardness in Wire Cut Process Based on Fuzzy Inference System

نویسندگان [English]

  • Farshad Rabiei 1
  • Masoud Seidi 1
  • Zahra Seidy 2
1 Faculty of Engineering, Ilam University, Ilam, Iran.
2 Faculty of Energy, Kermanshah University of Technology, Kermanshah, Iran
چکیده [English]

Pressing molds are widely used in the industry due to the high speed of parts production. Due to the very low clearance between the mandrel and the matrix and having complex shapes, the production of these molds is very expensive and costly.  The hardness of the mold and subsequently their fatigue life should be high. One of the processes that has the ability to create surfaces with high dimensional accuracy and complex shapes is the wirecut process. In this research, in order to improve the performance and increase the life of cutting dies, the hardness of Mo40 steel is optimized. For this purpose, based on the method of the response procedure, the design of the experiment has been designed for the three parameters of wire feed speed, wire tension and generator power. Next, the obtained data are clustered and then fuzzy rules with three inputs (wire speed, tension and power) and output (hardness) are extracted. The obtained rules were entered in the toolbox of fuzzy inference systems of MATLAB software. Based on the defined fuzzy inference system, it is possible to predict the hardness based on the parameters of wire speed, wire tension and generator power. In the next phase, based on this system and within the range of available variables, the optimal value of hardness and corresponding variables were extracted. In the final phase, these values ​​were experimentally tested and their agreement with the obtained value was observed.

کلیدواژه‌ها [English]

  • Wire Cut
  • Wire Feed Speed
  • Wire Tension
  • Generator Power
  • Fuzzy Inference System
  • Prediction and Modeling
  • Optimization

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