铸造内圆角及过渡尺寸(JB/ZQ 4255—1997) |
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内 圆 角 α |
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<50° |
51°~75° |
76°~105° |
106°~135° |
136°~165° |
>165° |
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钢 |
铁 |
钢 |
铁 |
钢 |
铁 |
钢 |
铁 |
钢 |
铁 |
钢 |
铁 |
|
过 渡 尺 寸 R/mm |
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≤8 |
4 |
4 |
4 |
4 |
6 |
4 |
8 |
6 |
16 |
10 |
20 |
16 |
9~12 |
4 |
4 |
4 |
4 |
6 |
6 |
10 |
8 |
16 |
12 |
25 |
20 |
13~16 |
4 |
4 |
6 |
4 |
8 |
6 |
12 |
10 |
20 |
16 |
30 |
25 |
17~20 |
6 |
4 |
8 |
6 |
10 |
8 |
16 |
12 |
25 |
20 |
40 |
30 |
21~27 |
6 |
6 |
10 |
8 |
12 |
10 |
20 |
16 |
30 |
25 |
50 |
40 |
28~35 |
8 |
6 |
12 |
10 |
16 |
12 |
25 |
20 |
40 |
30 |
60 |
50 |
36~45 |
10 |
8 |
16 |
12 |
20 |
16 |
30 |
25 |
50 |
40 |
80 |
60 |
46~60 |
12 |
10 |
20 |
16 |
25 |
20 |
35 |
30 |
60 |
50 |
100 |
80 |
61~80 |
16 |
12 |
25 |
20 |
30 |
25 |
40 |
35 |
80 |
60 |
120 |
100 |
81~110 |
20 |
16 |
25 |
20 |
35 |
30 |
50 |
40 |
100 |
80 |
160 |
120 |
111~150 |
20 |
16 |
30 |
25 |
40 |
35 |
60 |
50 |
100 |
80 |
160 |
120 |
151~200 |
25 |
20 |
40 |
30 |
50 |
40 |
80 |
60 |
120 |
100 |
200 |
160 |
201~250 |
30 |
25 |
50 |
40 |
60 |
50 |
100 |
80 |
160 |
120 |
250 |
200 |
251~300 |
40 |
30 |
60 |
50 |
80 |
60 |
120 |
100 |
200 |
160 |
300 |
250 |
>300 |
50 |
40 |
80 |
60 |
100 |
80 |
160 |
120 |
250 |
200 |
400 |
300 |
c 和 h 值 /mm |
b/a |
<0.4 |
0.5~0.65 |
0.66~0.8 |
>0.8 |
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≈c |
≈0.7(a - b) |
0.8(a - b) |
a - b |
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≈h |
钢 |
8 c |
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铁 |
9 c |
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注:对于锰钢件应比表中数值增大1.5倍。 |