附表7-1 螺纹、键、花键、横孔处及配合边缘处的有效应力集中系数
sb /MPa | 螺纹 (kt=1) ka | 键槽 | 横孔 | 配合 | ||||||||||||
ka | kt | ka | kt | ka | kt | H7/r6 | H7/k6 | H7/h6 | ||||||||
A型 | B型 | A、B型 | 矩形 | 渐开线形 | d0/d= 0.05~0.15 | d0/d= 0.05~0.25 | d0/d= 0.05~0.25 | ka | kt | ka | kt | ka | kt | |||
400 500 600 700 800 900 1000 1200 | 1.45 1.78 1.96 2.20 2.32 2.47 2.61 2.90 | 1.51 1.64 1.76 1.89 2.01 2.14 2.26 2.50 | 1.30 1.38 1.46 1.54 1.62 1.69 1.77 1.92 | 1.20 1.37 1.54 1.71 1.88 2.05 2.22 2.39 | 1.35 1.45 1.55 1.60 1.65 1.70 1.72 1.75 | 2.10 2.25 2.35 2.45 2.55 2.65 2.70 2.80 | 1.40 1.43 1.46 1.49 1.52 1.55 1.58 1.60 | 1.90 1.95 2.00 2.05 2.10 2.15 2.20 2.30 | 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.10 | 1.70 1.75 1.80 1.80 1.85 1.90 1.90 2.00 | 2.05 2.30 2.52 2.73 2.96 3.18 3.41 3.87 | 1.55 1.69 1.82 1.96 2.09 2.22 2.36 2.62 | 1.55 1.72 1.89 2.05 2.00 2.39 2.56 2.90 | 1.25 1.36 1.46 1.56 1.65 1.76 1.86 2.06 | 1.33 1.49 1.64 1.77 1.92 2.08 2.22 2.50 |
|
注:1、滚动轴承与轴的配合按H7/r6配合选择系数;
2、蜗杆螺旋根部有效应力集中系数可取ka=2.3~2.5,kt=1.7~1.9。
附表7-2 圆角处的有效应力集中系数
(D-d)/r | r/d | ka | kt | ||||||||||||||
sb/MPa | sb/MPa | ||||||||||||||||
400 | 500 | 600 | 700 | 800 | 900 | 1000 | 1200 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 | 1200 | ||
2 | 0.01 0.02 0.03 0.05 0.10 | 1.34 1.41 1.59 1.54 1.38 | 1.36 1.44 1.63 1.59 1.44 | 1.38 1.47 1.67 1.64 1.50 | 1.40 1.49 1.71 1.69 1.55 | 1.41 1.52 1.76 1.73 1.61 | 1.43 1.54 1.80 1.78 1.66 | 1.45 1.57 1.84 1.83 1.72 | 1.49 1.62 1.92 1.93 1.83 | 1.26 1.33 1.39 1.42 1.37 | 1.28 1.35 1.40 1.13 1.38 | 1.29 1.36 1.42 1.44 1.39 | 1.29 1.37 1.44 1.46 1.42 | 1.30 1.37 1.45 1.47 1.43 | 1.30 1.38 1.47 1.50 1.45 | 1.31 1.39 1.48 1.51 1.46 | 1.32 1.42 1.52 1.54 1.50 |
4 | 0.01 0.02 0.03 0.05 | 1.51 1.76 1.76 1.70 | 1.54 1.81 1.82 1.76 | 1.57 1.86 1.88 1.82 | 1.59 1.91 1.94 1.88 | 1.62 1.96 1.99 1.95 | 1.64 2.01 2.05 2.01 | 1.67 2.06 2.11 2.07 | 1.72 2.16 2.23 2.19 | 1.37 1.53 1.52 1.50 | 1.39 1.55 1.54 1.53 | 1.40 1.58 1.57 1.57 | 1.42 1.59 1.59 1.59 | 1.43 1.61 1.61 1.62 | 1.44 1.62 1.64 1.65 | 1.46 1.65 1.66 1.68 | 1.47 1.68 1.71 1.74 |
6 | 0.01 0.02 0.03 | 1.86 1.90 1.89 | 1.90 1.96 1.96 | 1.94 2.02 2.03 | 1.99 2.08 2.10 | 2.03 2.13 2.16 | 2.08 2.19 2.23 | 2.12 2.25 2.30 | 2.21 2.37 2.44 | 1.54 1.59 1.61 | 1.57 1.62 1.65 | 1.59 1.66 1.68 | 1.61 1.69 1.72 | 1.64 1.72 1.74 | 1.66 1.75 1.77 | 1.68 1.79 1.71 | 1.73 1.86 1.88 |
10 | 0.01 0.02 | 2.07 2.09 | 2.12 2.16 | 2.17 2.23 | 2.23 2.30 | 2.28 2.38 | 2.34 2.45 | 2.30 2.52 | 2.50 2.66 | 2.12 2.03 | 2.18 2.08 | 2.24 2.12 | 2.30 2.17 | 2.37 2.22 | 2.42 2.26 | 2.48 2.31 | 2.60 2.40 |
注:当r/d值超过表中给出的最大值时,按最大值查取。
附表7-3 环槽处的有效应力集中系数
系 数 | (D-d)/r | r/d | sb/MPa | ||||||
400 | 500 | 600 | 700 | 800 | 900 | 1000 | |||
ka | 1 | 0.01 | 1.88 1.79 1.72 1.61 1.41 | 1.93 1.84 1.77 1.66 1.48 | 1.98 1.89 1.82 1.71 1.52 | 2.04 1.95 1.87 1.77 1.55 | 2.09 2.00 1.92 1.82 1.59 | 2.15 2.06 1.97 1.88 1.62 | 2.20 2.11 2.02 1.93 1.66 |
2 | 0.01 0.02 0.03 0.05 | 2.09 1.99 1.91 1.79 | 2.15 2.05 1.97 1.85 | 2.21 2.11 2.03 1.91 | 2.27 2.17 2.08 1.97 | 2.34 2.23 2.14 2.03 | 2.39 2.28 2.19 2.09 | 2.45 2.35 2.25 2.15 | |
4 | 0.01 0.02 0.03 | 2.29 2.18 2.10 | 2.36 2.25 2.16 | 2.43 2.32 2.22 | 2.50 2.38 2.28 | 2.56 2.45 2.35 | 2.63 2.51 2.41 | 2.70 2.58 2.47 | |
6 | 0.01 0.02 | 2.38 2.28 | 2.47 2.35 | 2.56 2.42 | 2.64 2.49 | 2.73 2.56 | 2.81 2.63 | 2.90 2.70 | |
kt | 任何比值 | 0.01 0.02 0.03 0.05 0.10 | 1.60 1.51 1.44 1.34 1.17 | 1.70 1.60 1.52 1.40 1.20 | 1.80 1.69 1.60 1.46 1.23 | 1.90 1.77 1.67 1.52 1.26 | 2.00 1.86 1.75 1.57 1.28 | 2.10 1.94 1.82 1.63 1.31 | 2.20 2.03 1.90 1.69 1.34 |
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