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Date Submitted: 09/06/2013 10:10 PM
AENG 11 Engineering Shop Asst. Prof. Mark Keylord S. Onal
THE LATHE MACHINE
- the lathe is a metal turning machine tool in which metal is removed on a piece of work by slowly moving (feeding) a suitably formed cutting tool against a revolving piece of work - the direction of the feed may be more or less parallel to the axis of the work (longitudinal feed) or in a direction at right angles to the axis of the work (cross feed)
PRINCIPAL PARTS OF THE LATHE 1. BED – Often called the backbone of the lathe. The accuracy of the lathe depends upon the rigidity alignment and accuracy of the bed. The top surfaces, called ways, are machined to form inverted V’s and flat sides. 2. HEADSTOCK- It is located on the operator’s left. It supports and houses the spindle and the means of turning the spindle.
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AENG 11 Engineering Shop Asst. Prof. Mark Keylord S. Onal
3. TAILSTOCK- The moveable casting headstock on the ways of the bed.
located
opposite
the
4. CARRIAGE- The movable part which slides over the ways between the headstock and the tailstock. It carries the cutting tool and precisely controls its movements. 5. POWER FEED AND THREAD CUTTING MECHANISM- Transmits power from the spindle for precise longitudinal motion of the carriage as a whole. COMMON TYPES OF LATHE 1. BENCH LATHE- a small lathe usually mounted on a workbench and used for small work. 2. ENGINE LATHE- larger than the bench lathe, it is the most common kinds of lathe in the shop and is the most valuable machine tool in the shop. 3. TURRET LATHE- A major departure from the engine or basic lathes. These machines possess special features that adapt them to production. The skill of the worker has been built into these machines, making it possible for inexperienced operators to produce identical parts. 4. CNC Lathe - Same idea as a turret lathe but on computer control
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AENG 11 Engineering Shop Asst. Prof. Mark Keylord S. Onal
DIFFERENT LATHE OPERATIONS
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