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本文从V/F的物理意义出发,引出了“等效厚度D/”和“等效系数β”的新概念,而D′具有与V/F相同的量纲。用D′代替τ=αD法中的有效厚度D,克服了τ=αD中没有考虑工件几何形状因子的缺点。又通过对不同几何形状零件β值的计算,得出同一类型几何形状的零件具有相同的β值,从而用D′β=D的公式较方便地求出D′。由于V/F=D′=W,所以也改进了τ=KW法中计算W的繁琐性,从而把两种加热时间计算方法有机地统一起来。并通过实测的加热时间求出τ=αD′法中的α或τ=KW法中的K,便于推广应用。
Starting from the physical meaning of V / F, this paper leads to a new concept of “equivalent thickness D /” and “equivalent coefficient β”, while D ’has the same dimension as V / F. Substituting D ’for the effective thickness D in the τ = αD method overcomes the disadvantage that τ = αD does not take into account the geometry of the workpiece. And through the calculation of the β values of the parts with different geometrical shapes, it is found that the parts of the same type of geometry have the same β value, so that D ’can be conveniently obtained by the formula of D’β = D. Since V / F = D ’= W, the tediousness of calculating W in τ = KW method is also improved, so that the two heating time calculation methods are organically unified. And through the measured heating time to find τ = αD ’method α or τ = KW method K, easy to promote the application.