双对数方程在模压中的应用——压坯形状对方程的影响

来源期刊：中南大学学报(自然科学版)1983年第2期

论文作者：贺安安

文章页码：113 - 120

关键词：对数方程； 压坯形状； 压制模； 形状参数； 松装密度； 压制压力； 压坯密度； 回归系数； 模压； 最佳回归方程

摘    要：本研究初步探讨了黄培云教授导出的双对数方程在模压中的应用;给出了引入压坯形状参数的双对数方程。 log p=b₀+b₁(S_Z/S_Y)+(b₂+b₃(log s_Z/S_Y))log ln((d_m-d₀)d/(d_m-d)d₀) 式中,b_i是回归系数,d_m是金属的理论密度,d₀是粉末的松装密度,d是压坯密度,p是施加的单位压制压力,s_Z、s_Y分别是压坯的比侧表面和比压制表面。 本研究以图表的形式简化了上式的计算。由实验结果得到了雾化铁粉的真实对数压制模量b₀,摩擦系数μ和侧压系数ξ的积b₁/2 log e。

Abstract: The possibility of applying the double-logarithmic equation, advocatedby Professor Huang Peiyun, into die compaction was investigated. Thedouble-logarithmic equation in which the geometric parameters wereintroduced was given as: log p=b₀+b₁g S_z/S_y+(b₂+b₃ lgS_z/S_y)log ln (d_m-d₀)d/(d_m-d_y)d₀ where b₁ is the regression coefficient, d_m the solid density of the metal,d₀ the apparent density of the metal powder, d the green density of thepowder, p a specific compaction pressure, S_z and S_y the specific lateralsurface and the specific compacting surface of the compact on weight basisrespectively. Computation operations of this equation were simplified in a form ofgraphs. The true logarithmic modulus of pressing (b₀) and the product oftwo coefficients of horizontal pressure and friction (b₁/2 loge) for atomizediron powder may be obtained from the experiment data.