Which type of Lathe is operated through Cams and Cam plate?

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ALP CBT 2 Fitter Previous Paper: Held on 23 Jan 2019 Shift 2
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  1. Precision Lathe
  2. Capstan Lathe
  3. Screw cutting Lathe (Automatic)
  4. Crankshaft Lathe 

Answer (Detailed Solution Below)

Option 3 : Screw cutting Lathe (Automatic)
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Detailed Solution

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Explanation:

  • A lathe is a machine tool on which surfaces of revolution can be produced.
  • Generally, the workpiece rotates, and the cutter moves relative to the workpiece.

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  • A lathe is a machine tool that holds the job in between the center and rotates the job on its own axis.
  • Due to this quality of holding the job from the center and rotating the job, it is called the center lathe.
  • There are different types of lathe:
    • Speed lathe
    • Engine lathe or Centre lathe
    • Bench lathe
    • Toolroom lathe
    • Capstan and turret lathe
    • Special purpose lathe
    • Automatic lathe
    • CNC machine
    • Precision Lathe

Capstan and turret lathe:

  • These are developed from engine lathe, used for production work.
  • The tailstock of an engine lathe is replaced by a hexagonal turret where a number of tools can be mounted.
  • A number of identical parts can be produced in minimum time.

Precision Lathe

  • Capable of giving a dimensional accuracy of 0.002 mm.
  • The precision turning of the previously rough-turned workpiece. 
  • In many cases, replace a high class grinding machine because of its fine dimensional accuracy.

Screw Cutting Lathe (automatic)

  • It is operated through cams and cam plates.
  • It is used for mass production of screwed parts. Especially suitable for precision screw work.

Crankshaft Lathe

  • It carries all the attachments, like taper turning and threading, etc.
  • In addition, a number of rests (supports) for the shafts.
  • It is used for turning very long parts such as turbine and engine shafts and crankshafts.
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