铸件公差
符合金属严格按照国家标准规范
铸件的尺寸精度是铸件的重要质量指标之一.而铸件尺寸公差标准则是衡量铸件尺寸精度的客观依据。金属严格按照国家标准GB/T6414-2017执行。
对于熔模铸件，根据其最大公称尺寸选用以下相应的公差等级：
1、最大公称尺寸≤100时，选DCTG4~DCTG6级；
2、100＜最大公称尺寸≤400，选DCTG4~DCTG8级；
3、最大公称尺寸＞400时，选DCTG4~DCTG9级。
铸件尺寸公差(DCTG)
|
公称尺寸
|
铸件尺寸公差等级(DCTG)及相应的线性尺寸公差值
|
|
大于
|
至
|
DCTG1
|
DCTG2
|
DCTG3
|
DCTG4
|
DCTG5
|
DCTG6
|
DCTG7
|
DCTG8
|
DCTG9
|
|
-
|
10
|
0.09
|
0.13
|
0.18
|
0.26
|
0.36
|
0.52
|
0.74
|
1
|
1.5
|
|
10
|
16
|
0.1
|
0.14
|
0.2
|
0.28
|
0.38
|
0.54
|
0.78
|
1.1
|
1.6
|
|
16
|
25
|
0.11
|
0.15
|
0.22
|
0.3
|
0.42
|
0.58
|
0.82
|
1.2
|
1.7
|
|
25
|
40
|
0.12
|
0.17
|
0.24
|
0.32
|
0.46
|
0.64
|
0.9
|
1.3
|
1.8
|
|
40
|
63
|
0.13
|
0.18
|
0.26
|
0.36
|
0.5
|
0.7
|
1
|
1.4
|
2
|
|
63
|
100
|
0.14
|
0.2
|
0.28
|
0.4
|
0.56
|
0.78
|
1.1
|
1.6
|
2.2
|
|
100
|
160
|
0.15
|
0.22
|
0.3
|
0.44
|
0.62
|
0.88
|
1.2
|
1.8
|
2.5
|
|
160
|
250
|
-
|
0.24
|
0.34
|
0.5
|
0.7
|
1
|
1.4
|
2
|
2.8
|
|
250
|
400
|
-
|
-
|
0.4
|
0.56
|
0.78
|
1.1
|
1.6
|
2.2
|
3.2
|
|
400
|
630
|
-
|
-
|
-
|
0.64
|
0.9
|
1.2
|
1.8
|
2.6
|
3.6
|
|
630
|
1000
|
-
|
-
|
-
|
0.72
|
1
|
1.4
|
2
|
2.8
|
4
|
铸件直线度公差
|
公称尺寸
|
铸件几何公差等级(DCTG)及相应的直线度公差
|
|
大于
|
至
|
DCTG2
|
DCTG3
|
DCTG4
|
DCTG5
|
DCTG6
|
DCTG7
|
DCTG8
|
|
-
|
10
|
0.08
|
0.12
|
0.18
|
0.27
|
0.4
|
0.6
|
0.9
|
|
10
|
30
|
0.12
|
0.18
|
0.27
|
0.4
|
0.6
|
0.9
|
1.4
|
|
30
|
100
|
0.18
|
0.27
|
0.4
|
0.6
|
0.9
|
1.4
|
2
|
|
100
|
300
|
0.27
|
0.4
|
0.6
|
0.9
|
1.4
|
2
|
3
|
|
300
|
1000
|
0.4
|
0.6
|
0.9
|
1.4
|
2
|
3
|
4.5
|
|
1000
|
3000
|
-
|
-
|
-
|
3
|
2
|
6
|
9
|
|
3000
|
6000
|
-
|
-
|
-
|
6
|
8
|
12
|
18
|
|
6000
|
10000
|
-
|
-
|
-
|
12
|
16
|
24
|
36
|
铸件平面度公差
|
公称尺寸
|
铸件几何公差等级(DCTG)及相应的平面度公差
|
|
大于
|
至
|
DCTG2
|
DCTG3
|
DCTG4
|
DCTG5
|
DCTG6
|
DCTG7
|
DCTG8
|
|
-
|
10
|
0.12
|
0.18
|
0.27
|
0.4
|
0.6
|
0.9
|
1.4
|
|
10
|
30
|
0.18
|
0.27
|
0.4
|
0.6
|
0.9
|
1.4
|
2
|
|
30
|
100
|
0.27
|
0.4
|
0.6
|
0.9
|
1.4
|
2
|
3
|
|
100
|
300
|
0.4
|
0.6
|
0.9
|
1.4
|
2
|
3
|
4.5
|
|
300
|
1000
|
0.6
|
0.9
|
1.4
|
2
|
3
|
4.5
|
7
|
|
1000
|
3000
|
-
|
-
|
-
|
4
|
6
|
9
|
14
|
|
3000
|
6000
|
-
|
-
|
-
|
8
|
12
|
18
|
28
|
|
6000
|
10000
|
-
|
-
|
-
|
16
|
24
|
36
|
56
|
铸件圆度、平行度、垂直度和对称度公差
|
公称尺寸
|
铸件几何公差等级(DCTG)及相应的公差
|
|
大于
|
至
|
DCTG2
|
DCTG3
|
DCTG4
|
DCTG5
|
DCTG6
|
DCTG7
|
DCTG8
|
|
-
|
10
|
0.18
|
0.27
|
0.4
|
0.6
|
0.9
|
1.4
|
2
|
|
10
|
30
|
0.27
|
0.4
|
0.6
|
0.9
|
1.4
|
2
|
3
|
|
30
|
100
|
0.4
|
0.6
|
0.9
|
1.4
|
2
|
3
|
4.5
|
|
100
|
300
|
0.6
|
0.9
|
1.4
|
2
|
3
|
4.5
|
7
|
|
300
|
1000
|
0.9
|
1.4
|
2
|
3
|
4.5
|
7
|
10
|
|
1000
|
3000
|
-
|
-
|
-
|
6
|
9
|
14
|
20
|
|
3000
|
6000
|
-
|
-
|
-
|
12
|
18
|
28
|
40
|
|
6000
|
10000
|
-
|
-
|
-
|
24
|
36
|
56
|
80
|
铸件同轴度公差
|
公称尺寸
|
铸件几何公差等级(DCTG)及相应的同轴度公差
|
|
大于
|
至
|
DCTG2
|
DCTG3
|
DCTG4
|
DCTG5
|
DCTG6
|
DCTG7
|
DCTG8
|
|
-
|
10
|
0.27
|
0.4
|
0.6
|
0.9
|
1.4
|
2
|
3
|
|
10
|
30
|
0.4
|
0.6
|
0.9
|
1.4
|
2
|
3
|
4.5
|
|
30
|
100
|
0.6
|
0.9
|
1.4
|
2
|
3
|
4.5
|
7
|
|
100
|
300
|
0.9
|
1.4
|
2
|
3
|
4.5
|
7
|
10
|
|
300
|
1000
|
1.4
|
2
|
3
|
4.5
|
7
|
10
|
15
|
|
1000
|
3000
|
-
|
-
|
-
|
9
|
14
|
20
|
30
|
|
3000
|
6000
|
-
|
-
|
-
|
18
|
28
|
40
|
60
|
|
6000
|
10000
|
-
|
-
|
-
|
36
|
56
|
80
|
120
|
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