铸造外圆角(摘自JB/ZQ4256—1997)(mm)
| 表面最小 边尺寸P | R 值 |
外 圆 角α |
≤50° | 51~75º | 76~105º | 106~135º | 136~165º | >165º |
≤25 | 2 | 2 | 2 | 4 | 6 | 8 |
25~60 | 2 | 4 | 4 | 6 | 10 | 16 |
60~160 | 4 | 4 | 6 | 8 | 16 | 25 |
160~250 | 4 | 6 | 8 | 12 | 20 | 30 |
250~400 | 6 | 8 | 10 | 16 | 25 | 40 |
400~600 | 6 | 8 | 12 | 20 | 30 | 50 |
600~1 000 | 8 | 12 | 16 | 25 | 40 | 60 |
1 000~1 600 | 10 | 16 | 20 | 30 | 50 | 80 |
1 600~2 500 | 12 | 20 | 25 | 40 | 60 | 100 |
>2 500 | 16 | 25 | 30 | 50 | 80 | 120 |
注:⒈P为表面的最小边尺寸。⒉如一铸件按表铸造外圆角可选出许多不同的圆角“R”时,应尽量减少或只取一适当的“R”值以求统一。铸造内圆角(摘自JB/ZQ4255—1997)(mm)
|
| R 值 |
内 圆 角 α |
<50° | 51°~75° | 76°~105° | 106°~135° | 136°~165° | >165° |
钢 | 铁 | 钢 | 铁 | 钢 | 铁 | 钢 | 铁 | 钢 | 铁 | 钢 | 铁 |
≤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 | d2/d1 | <0.4 | 0.5~0.65 | 0.66~0.8 |
c | ≈0.7(d1-d2) | ≈0.8(d1-d2) | ≈d1-d2 |
h | 钢≈8c | 铁≈9c |
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