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一、决定配合性质的基本参数间隙或过盈是决定零件配合性质的基本参数.设允许的最小间隙X_(min)或最大过盈Y_(max)为配合参数F_1,允许的最大间隙X_(max)或最小过盈Y_(min)为配合参数F_2。F_1由孔和轴的允许作用尺寸即边界尺寸BS决定: F_1=BS_(H)-BS_(s) (1)若F1>0,则F_1=X_(min);若F_1<0,则F_1=Y_(max)。F_2由孔和轴的最小实体尺寸LMC决定: F_2=LMC_(H)-LMC_(S) (2)若F_2>0,则F_2=X_(max);若F_2<0,则F_2=Y_(min)。式中:BS_(H)、BS_(S)——分别表示孔或轴的边界尺寸: LMC_(H)、LMC_(S)——分别表示孔或轴的最小
First, determine the nature of the basic parameters with the gap or interference is to determine the nature of the parts with the basic parameters set allowable minimum clearance X_ (min) or maximum interference Y_ (max) with the parameters F_1, the maximum allowable gap X_ (max ) Or the minimum interference Y_ (min) with the parameters F_2. F_1 is determined by the allowable size of the hole and the axis, ie the boundary dimension BS: F_1 = BS_ (H) - BS_ (s) (1) F_1 = X_min if F1> 0; Y_ (max). F_2 is determined by the smallest physical size of the hole and the axis LMC: F_2 = LMC_ (H) -LMC_ (S) (2) F_2 = X_max if F_2> 0, F_2 = Y_min ). Where: BS_ (H), BS_ (S) - respectively represent the hole or the axis of the border size: LMC_ (H), LMC_ (S)