本次修订的主要内容：1.章节结构的调整；修改了原规范的章、节名称和机床的名称。2.修改和调整了部分金属切削机床的几何精度检测方法和允许偏差；3.增加了重型深孔钻镗床和小型组合机床的安装。
GB50271-2009······1
1 总则······10
2 基本规定······11
3 车床······17
3.1 单轴纵切、卧式多轴自动车床······17
3.2 回轮、转塔车床······17
3.3 单柱、双柱立式车床······20
3.4 卧式车床······23
3.5 重型卧式车床······26
4 钻床······35
4.1 摇臂钻床······35
4.2 立式钻床······37
5 镗床······39
5.1 重型深孔钻镗床······39
5.2 坐标镗床······49
5.3 卧式铣镗床······53
5.4 落地镗床、落地铣镗床······58
5.5 刨台卧式铣镗床······58
5.6 精镗床······68
6 磨床······72
6.1 无心外圆磨床······72
6.2 外圆磨床······72
6.3 内圆磨床······73
6.4 导轨磨床······74
6.5 刀具刃磨床······82
6.6 平面、端面磨床······84
6.7 立式内圆珩磨机······86
7 齿轮加工机床······87
7.1 锥齿轮加工机······87
7.2 滚齿机······87
7.3 剃齿机······89
7.4 插齿机······89
7.5 花键轴铣床······91
7.6 齿轮磨齿机······93
8 螺纹加工机床······94
8.1丝锥磨床······94
8.2 螺纹磨床······94
8.3丝杠车床······96
9 铣床······98
9.1 龙门铣床······98
9.2 平面铣床······104
9.3 升降台铣床、摇臂铣床、万能工具铣床······106
10 刨插床······107
10.1 悬臂刨床、龙门刨床······107
10.2插床······112
10.3 牛头刨床······114
11 拉床······115
11.1 立式内拉床······115
11.2 卧式内拉床······116
11.3 立式外拉床······118
12 锯床······120
13 特种加工机床······121
14 组合机床······122
14.1 钻镗组合机床······122
14.2 铣削组合机床······124
14.3 攻丝组合机床······125
14.4 小型组合机床······127
14.5 组合机床自动线······129
15 工程验收······133
附录A 本规范适用的金属切削机床范围······134
附录B 直线度偏差值的计算······137
本规范用词说明······138
附:条文说明······140
1 总则······143
2 基本规定······145
3 车床······148
3.1 单轴纵切、卧式多轴自动车床······148
3.2 回轮、转塔车床······148
3.3 单柱、双柱立式车床······149
3.4 卧式车床······149
3.5 重型卧式车床······149
4 钻床······150
4.1 摇臂钻床······150
4.2 立式钻床······150
5 镗床······151
5.1 重型深孔钻镗床······151
5.2 坐标镗床······151
5.3 卧式铣镗床······153
5.4 落地镗床、落地铣镗床······154
5.5 刨台卧式铣镗床······155
5.6 精镗床······156
6 磨床······157
6.2 外圆磨床······157
6.4 导轨磨床······157
6.5刀具刃磨床······157
6.6 平面、端面磨床······158
6.7 立式内圆珩磨机······159
7 齿轮加工机床······160
7.1 锥齿轮加工机······160
7.2 滚齿机······160
7.3 剃齿机······160
7.4 插齿机······160
7.5 花键轴铣床······161
7.6 齿轮磨齿机······161
8 螺纹加工机床······162
8.1 丝锥磨床······162
8.2 螺纹磨床······162
8.3 丝杠车床······162
9 铣床······163
9.1 龙门铣床······163
9.2 平面铣床······164
9.3 升降台铣床、摇臂铣床、万能工具铣床······164
10 刨插床······165
10.1 悬臂刨床、龙门刨床······165
10.2 插床······165
10.3 牛头刨床······165
11 拉床······167
11.1 立式内拉床······167
11.2 卧式内拉床······167
11.3 立式外拉床······167
12 锯床······168
13 特种加工机床······169
14 组合机床······170
14.2 铣削组合机床······170
14.3 攻丝组合机床······170
14.4 小型组合机床······170
14.5 组合机床自动线······171
15 工程验收······172
