(1. 太原重型機械學(xué)院壓力加工系，太原 030024;
2. 哈爾濱工業(yè)大學(xué)材料科學(xué)與工程學(xué)院，哈爾濱 150001)
摘 要: 采用剛塑性有限元法對徑向筋條的成形過程進(jìn)行了模擬，結(jié)果表明，鍛造時，金屬首先充填軸套部分，軸套部分基本充滿后才開始充填筋部，且筋條的充填順序為由里到外，外側(cè)頂部為最后充填處。在變形終了階段，腹板與軸套交界處出現(xiàn)劇烈的剪切流動，有可能造成組織缺陷。根據(jù)模擬結(jié)果，鍛造時采取了特殊措施，成功地鍛制出上機匣鍛件，鍛件的力學(xué)性能、顯微組織和尺寸精度均符合要求。
關(guān)鍵字: 塑性成形；有限元法；數(shù)值模擬
（1. Department of Metal Forming, Taiyuan Heavy Machinery Institute, Taiyuan 030024, P.R.China
2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China）
Abstract:The forming process of radial rib of upper case is simulated by the rigid plastic finite element method. It can be seen that, in the forming process, the metal fulfill the axial ring first, then fulfill the rib. The sequence of metal fulfillment is from the inner to the outer and the upper portion of the outer is fulfilled lastly. In the final stage of forming, the severe shear flow presents at the joint portion of web and axial ring which is of the possibility for generating the defects of microstructure. According to the simulating result, some special means are adopted and the forging of upper case is conducted successfully. Both the mechanical properties, microstructure and the accuracy of forging satisfy the requirements of the user.
Key words: plastic forming；finite element method；numerical simulation
