تحليل اجزاي محدود و تجربي فرايند شكل دهي نموي، بررسي شكل و توزيع ضخامت ورق

Experimental and FEM analysis of incremental sheet forming, investigation of shape and plate thickness distribution

شكل­ دهي نموي يكي از فرآيند­هاي نوين شكل ­دهي مي­باشد. در سال­هاي اخير به منظور دست­يابي به كنترل و انعطاف­پذيري فرايند­هاي شكل ­دهي، اين فرايند به طور ويژه­اي مورد بررسي قرار گرفته است. در اين تحقيق تحليل اجزاي محدود فرايند با هدف ايجاد قطعه به صورت مخروط ناقص با بكارگيري صفحات نگهدارنده فوقاني و زيرين صورت گرفت. در تحليل از كد Vdisp جهت تعريف مسير پيچيده ابزار استفاده شد. انجام آزمايش تجربي مطابق با تحليل صورت گرفته و بررسي شكل نهايي و توزيع ضخامت در طول ورق نشان داد، كد فوق با دقت خوبي مسير ابزار را مدل كرده و انطباق خوبي بين نتايج در حالت تجربي و اجزاي محدود وجود دارد.

Incremental sheet forming is a novel process. In recent years considerable attention has been paid to perform this process more flexibly and controllably. For producing of parts by traditional forming processes tool and die are required and Construction of this equipment is a costly and time-consuming process, so does not need any die is one of advantages of this process. In incremental sheet forming there are many parameters that have significant impacts on the quality of final product. In this study, the FEM analysis of incremental sheet forming to achieve cone frustum by using clamp and rig was done. In this analysis, due to the complex tool path a Vdisp code was used. Experimental tests have been done in accordance with the analysis. By investigating the final shape and the thickness distribution along the sheet, it was shown that the code had modeled the tool path with a good accuracy and there was a good agreement between the FEM and experimental test results.