A lathe is a machine tool that rotates the workpiece about an axis of rotation to perform various operations such as cutting, sanding, knurling, drilling, deformation, facing, turning, with tools that are applied to the workpiece to create an object with symmetry about that axis.
>They are lighter in construction.
>Only limited amount of feed and depth of cut are provided for machining.
>It is use for mass production of small size equal part.
>It have hand operated collet chucks.
There are basically two broad classification of semi-automatic lathe.They are:
- Turret Lathe
- Capstan Lathe
TURRET LATHE :
>The turret lathe is a form of metalworking lathe that is used for repetitive production of duplicate parts, which by the nature of their cutting process are usually interchangeable.
>It has additional turret, which is an indexable toolholder that allows multiple cutting operations to be performed, each with a different cutting tool.
>Need for the operator to perform set-up tasks in between, such as installing or uninstalling tools is not required.
>The turret head is directly mounted on the saddle and the saddle slides over the bed ways. (See figure.)
Fig:Turret Lathe |
>Saddle is moved to provide feed to the tool.
>They are heavy and durable.
>More feed and depth of cut are provided for machining.
>It is use for mass production of large size equal part.
>It is accommodated with power chucks.
>They are heavy and durable.
>More feed and depth of cut are provided for machining.
>It is use for mass production of large size equal part.
>It is accommodated with power chucks.
CAPSTAN LATHE :
>The capstan lathe also has a turret which contains multiple cutting tools but in case of capstan lathe the turret head is mounted on the ram and the ram is mounted on the saddle.(See figure)
Fig:Capstan Lathe
>Saddle is locked at a particular point and the ram is moved to provide feed to the tool.>They are lighter in construction.
>Only limited amount of feed and depth of cut are provided for machining.
>It is use for mass production of small size equal part.
>It have hand operated collet chucks.
Also see : LATHE AND OPERATIONS ON IT
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