H7与H8级精度孔加工方式及余量(在实体材料上加工)
(2009-03-21 10:35:37)
标签:
杂谈 |
分类: 机械制造技术 |
H7与H8级精度孔加工方式及余量(在实体材料上加工)
加工孔的直径 |
直径 |
|||||||
钻 |
粗加工 |
半精加工 |
精加工 |
|||||
第一次 |
第二次 |
粗镗 |
或扩孔 |
粗铰 |
或半精镗 |
精铰 |
或精镗 |
|
3 |
2.9 |
- |
- |
- |
- |
- |
3 |
- |
4 |
3.9 |
- |
- |
- |
- |
- |
4 |
- |
5 |
4.8 |
- |
- |
- |
- |
- |
5 |
- |
6 |
5 |
- |
- |
5.85 |
- |
- |
6 |
- |
8 |
7 |
- |
- |
7.85 |
- |
- |
8 |
- |
10 |
9 |
- |
- |
9.85 |
- |
- |
10 |
- |
12 |
11 |
- |
- |
11.85 |
11.95 |
- |
12 |
- |
13 |
12 |
- |
- |
12.85 |
12.95 |
- |
13 |
- |
14 |
13 |
- |
- |
13.85 |
13.95 |
- |
14 |
- |
15 |
14 |
- |
- |
14.85 |
14.95 |
- |
15 |
- |
16 |
15 |
- |
- |
15.85 |
15.95 |
- |
16 |
- |
18 |
17 |
- |
- |
17.85 |
17.95 |
- |
18 |
- |
20 |
18 |
- |
19.8 |
19.8 |
19.95 |
19.9 |
20 |
20 |
22 |
20 |
- |
21.8 |
21.8 |
21.95 |
21.9 |
22 |
22 |
24 |
22 |
- |
23.8 |
23.8 |
23.95 |
23.9 |
24 |
24 |
25 |
23 |
- |
24.8 |
24.8 |
24.95 |
24.9 |
25 |
25 |
26 |
24 |
- |
25.8 |
25.8 |
25.95 |
25.9 |
26 |
26 |
28 |
26 |
- |
27.8 |
27.8 |
27.95 |
27.9 |
28 |
28 |
30 |
15 |
28 |
29.8 |
29.8 |
29.95 |
29.9 |
30 |
30 |
32 |
15 |
30 |
31.7 |
31.75 |
31.93 |
31.9 |
32 |
32 |
35 |
20 |
33 |
34.7 |
34.75 |
34.93 |
34.9 |
35 |
35 |
38 |
20 |
36 |
37.7 |
37.75 |
37.93 |
37.9 |
38 |
38 |
40 |
25 |
38 |
39.7 |
39.75 |
39.93 |
39.9 |
40 |
40 |
42 |
25 |
40 |
41.7 |
41.75 |
41.93 |
41.9 |
42 |
42 |
45 |
30 |
43 |
44.7 |
44.75 |
44.93 |
44.9 |
45 |
45 |
48 |
36 |
46 |
47.7 |
47.75 |
47.93 |
47.9 |
48 |
48 |
50 |
36 |
48 |
49.7 |
49.75 |
49.93 |
49.9 |
50 |
50 |
注:在铸铁上加工直径为30mm与32mm的孔可用Ф28与Ф30钻头钻一次。