Unit 4 Machine Tools The Engine Lathe(普通车床) o Engine lathe: the versatile engine lathe ranges in size and design from small bench and speed lathes to large floor types. The workpiece may be held between tapered centers and rotated with the powder spindle by means of a clamping device, or it may held in a chuck, or even fixed to a rotating plate. When the work is swung between centers, the tailstocks clamped firmly in place. 普通车床:多用途的车床,其大小和设计多种多样,有小的台式车床、高 速车床,大的落地式车床 工件支在两个锥形顶尖之间。通过夹紧装置且与主轴一起转动,或者工件 装在夹盘上,甚至可固定在一个转盘上。 当工件在两个顶尖之间转动时,尾轴则保持不动。Unit 4 Machine Tools ⚫ The Engine Lathe（普通车床） ⚫ Engine lathe: the versatile engine lathe ranges in size and design from small bench and speed lathes to large floor types. ⚫ The workpiece may be held between tapered centers and rotated with the powder spindle by means of a clamping device, or it may be held in a chuck, or even fixed to a rotating plate. ⚫ When the work is swung between centers, the tailstock is clamped firmly in place. 普通车床：多用途的车床，其大小和设计多种多样，有小的台式车床、高 速车床，大的落地式车床。 工件支在两个锥形顶尖之间。通过夹紧装置且与主轴一起转动，或者工件 装在夹盘上，甚至可固定在一个转盘上。 当工件在两个顶尖之间转动时，尾轴则保持不动