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内螺旋齿、螺线的拉削是拉削工艺最成熟的典型之一，我们为该工序的加工可采用立式、卧式的拉削方式进行加工。加工对象范围涉及拖拉机、叉车、汽车转向器、军工行业、滚珠丝杆螺母及电动工具行业等大批量、多品种的内螺纹加工。
为进—步提高产品品质，我们又研制了数控螺纹拉床，采用CNC系统和交流伺服驱动装置。其加工精度能确保内螺纹螺距及螺纹起点公差，且精度可靠。注意运用拉削较之车削内螺纹，其工效可提高10倍以上。
Internal helical tooth thread and spiral curve usually adopts vertical broaching and horizontal broaching and it is one of the most mature techniques of broaching. It can be used for machining internal thread in quantity production in tractor, forklift, truck, automobile steering device, military industry, ball screw nut and electric tools industry. In order to improving the quality of the machine, we newly researched CNC broaching machine, which adopts CNC system and AC servo drive device. The machining precision of it guaranteed the thread pitch and starting point tolerance of internal thread.
Note: Working efficiency of broaching internal thread is 10 times compared with that of turning.
| 机床型号 Model |
LK8805 | LK8810 | LK8820 | 单位unit |
| 额定拉力 Rated pulling capacity | 50 | 100 | 200 | KN |
| 额定扭矩 Rated torque | 45 | 90 | 180 | Nm |
| 额定行程 Nominal stroke | 800 | 1250 | 1600 | mm |
| 拉刀最大长度 Max.length of broach | 990 | 1400 | 1850 | mm |
| 工作速度 Cutting speed | 1～10 | 1~10 | 1~20 | n/mim |
| 返回速度 Return speed | 1～10 | 1~10 | 1~20 | n/mim |
| 送刀速度 Tool down feeding speed | 1～5 | 1~5 | 1~5 | n/min |
| 提刀速度 Tool feeding speed | 1～5 | 1~5 | 1~5 | n/min |
| 工作台尺寸（长×宽） Size of work table(L×W) | 240×195 | 300×320 | 360×400 | mm |
| 工作台孔径 Bore of working table | 80 | 150 | 200 | mm |
| 上下料高度 Height of loading and unloading | 890 | 925 | 1050 | mm |
| 推料行程 Stroke of thrust workpiece | 72 | 90 | 200 | mm |
| Z轴伺服电机功率 Power of servo motor of Z axis | 9 | 20 | 37 | KW |
| Z轴伺服电机转矩 Torque of servo motor of Z axis | 45 | 90 | 180 | Nm |
| Z轴伺服电机转速 Speed of servo motor of Z axis | 2000 | 2000 | 2000 | rpm |
| C轴伺服电机功率 Power of servo motor of C axis | 1.5 | 3.5 | 7.5 | KW |
| C轴伺服电机转矩 Torque of servo motor of C axis | 7.5 | 16 | 36 | Nm |
| C轴伺服电机转速 Speed of servo motor of C axis | 2000 | 2000 | 2000 | rpm |
| 冷却泵电机功率 Power of coolant pump motor | 1.1 | 1.1 | 1.1 | KW |
| 润滑电机功率 Power of lubricating motor | 20 | 20 | 20 | W |
