بهینه‌سازی دقت ابعادی فولادِ قالب در فرایند وایرکات مبتنی بر روش سطح پاسخ

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده فنی مهندسی، دانشگاه ایلام، ایلام، ایران

2 گروه مکانیک، دانشکده فنی و مهندسی، دانشگاه ایلام

3 دانشکده انرژی، دانشگاه صنعتی کرمانشاه، کرمانشاه، ایران

چکیده

یکی از قطعات صنعتی که نیازمند دقت ساخت بسیار بالایی می باشد قالب های صنعتی و خصوصاً قالب های برش می باشد. در این قالب ها میزان لقی سنبه و ماتریس برابر 0.1 ضخامت ورق است از این رو دقت ساخت این قالب ها بسیار دارای اهمیت می باشد. امروزه از فرایند وایرکات در ساخت این قالب ها به وفور مورد استفاده قرار می گیرد. در فرایند، بدلیل عدم تماس ابزار با قطعه کار، تنش های مکانیکی وجود ندارد و قطعات تولیدی دارای دقت بالایی هستند. با این وجود، جهت دستیابی به دقت بالای مورد نیاز در ساخت قالبهای برش، از روشهای مختلفی استفاده می شود. در این تحقیق با استفاده از روش رویه پاسخ، مقدار دقت ابعادی بر اساس سه پارامتر سرعت سیم، کشش سیم و توان ژنراتور برای قطعه کار فولادی Mo40 مورد بررسی قرار گرفته است. بر اساس این روش، در ابتدا میزان اهمیت هر یک از پارامترها بر دقت ابعادی مشخص گردید. سپس با استخراج معادله منطبق بر تستهای انجام شده، مقدار بهینه دقت ابعادی بر اساس پارامترهای مذکور استخراج گردید. نتایج نشان داد که به ازای مقادیر کشش 1.3485 کیلوگرم، سرعت سیم 10 سانتیمتر بر ثانیه و توان 46.7677 درصد مقدار دقت به بیشینه مقدار خود می رسد. در نهایت این مقادیر به صورت تجربی مورد تست قرار گرفت و مقدار 0.2 درصد خطا ثبت گردید. از این رو می توان با استفاده از روش رویه پاسخ، مقدار دقت ابعادی را در فرایند وایرکات قالبهای صنعتی فولادی مورد استفاده قرار داد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Optimization of Dimensional Accuracy of Mold Steel in Wire Cut Process Based on Response Surface Method

نویسندگان [English]

  • Masoud Seidi 1
  • Farshad Rabiei 2
  • Zahra Seidy 3
1 Faculty of Engineering, Ilam University, Ilam, Iran
2 Department of mechanical engineering, Ilam university, Ilam, Iran
3 Faculty of Energy, Kermanshah University of Technology, Kermanshah, Iran
چکیده [English]

One of the industrial parts that requires very high manufacturing accuracy is industrial molds and especially cutting molds. In these molds, the clearance of the dies is equal to 0.1 of the thickness of the sheet, so the accuracy of making these molds is very important. Today, the wirecut process is widely used in making these molds. In the process, due to the lack of contact between the tool and the work piece, there is no mechanical tension and the produced parts have high precision. Nevertheless, in order to achieve the high precision required in the production of cutting molds, various methods are used. In this research, using the response surface method, the dimensional accuracy value has been investigated based on three parameters of wire speed, wire tension and generator power for Mo40 steel workpiece. Based on this method, at first, the importance of each parameter on dimensional accuracy was determined. Then, by deriving the equation according to the conducted tests, the optimal value of dimensional accuracy was extracted based on the mentioned parameters. The results showed that for tension values of 1.3485 kg, wire speed of 10 cm/s and power of 46.7677%, the accuracy value reaches its maximum value. Finally, these values were experimentally tested and a 0.2% error was recorded. Therefore, by using the method of the response procedure, the amount of dimensional accuracy can be used in the wirecut process of industrial steel molds.

کلیدواژه‌ها [English]

  • Wire Cut
  • Wire Feed Speed
  • Wire Tension
  • Generator Power
  • Response Surface Method
  • Dimensional Accuracy
  • Optimization

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