【摘要】 圆形铝板拉深过程中的制耳现象造成原材料的极大浪费,板材中存在的织构造成板面塑性各向异性,从而造成了制耳现象。改变各种织构组分的体积比,使晶粒取向分布趋于均匀,可以降低板材的制耳率。用织构组分体积比只能粗略地描述板材的晶粒取向分布,而织构系数则能更准确地描述板材内的晶粒取向分布。文章假设铝板法兰区承受均匀的环向、径向应力,各个方向上的径向应变与晶粒取向有关。并根据晶粒取向分布函数的对称性,得到了织构系数与制耳倾向之间的关系。更多还原

【Abstract】 The earing of round shaped aluminum sheet in deep drawing results in material wasting.The textures in the aluminum sheet cause anisotropy and the phenomenon of earing.The earing ratio could be reduced by adjusting the proportion of textures to make the orientation and distribution of the crystals to be uniform.The texture ratio could only describe the crystalline orientation and distribution roughly,while the texture coefficients could describe well and truly.Supposing that the flank enduring uniform radial and circumferential stresses,and the radial strains depend on the orientation distribution,the relation between the texture coefficients and the earing tendency of aluminum sheets based on the symmetry of the orientation distribution function has been found out.更多还原