Different Types of Lathe Operations And Alignment Test Group Members : Roll No Ahir Nischal 02 Bhavsar Miraj 10 Gupta Mukesh 18 Mahngani Rohit 26

PHOTOGRAPHIC VIEW OF LATHE

Lathes and Lathe Operations Lathes are the oldest machine tools Lathe Components Bed: supports all major components Carriage: slides along the ways and consists of the cross-slide, tool post, apron Headstock – Holds the jaws for the work piece, supplies power to the jaws and has various drive speeds Tailstock – supports the other end of the work piece Feed Rod and Lead Screw – Feed rod is powered by a set of gears from the headstock

Lathe Operations Turning: produce straight, conical, curved, or grooved work pieces Facing: to produce a flat surface at the end of the part or for making face grooves.   Boring: to enlarge a hole or cylindrical cavity made by a previous process or to produce circular internal grooves. Drilling: to produce a hole by fixing a drill in the tailstock Threading: to produce external or internal threads Knurling: to produce a regularly shaped roughness on cylindrical surfaces

Different Types Of Lathe Operations

Alignment Test A machine tools is capable of producing good work, certain tests are performed on it. These test can be classified as “ Geometric” and “ Practical” tests. Lathe Testes Spindle axis parallel to Bed Line of centers parallel to bed Tailstock quill movement parallel to bed

Spindle axis parallel to bed :- The equipment required for this test consists of a dial gauge and stand, together with a special mandrel. The dial gauge should be in 0.0125mm divisions and have a light measuring pressure. The mandrel has a parallel about 25 mm in diameter and 300 mm long, with taper end of fit the headstock spindle.

Line of centers parallel to Bed :- The mandrel is held between the centers on the machine and the dial gauge clamped to the carriage. The mandrel remains stationary while the dial gauge is moved along by traversing the carriage. If, as is usual, the tailstock has a set-over adjustment, the test is performed only in the vertical plane. Any error should be a rise, not exceeding 0.0125 mm per 300 mm at the tailstock end. Testing Parallelism of Line of Centers with bed

Cross –slide perpendicular to spindle axis:- In this method , a straightedge is clamped to the cross- side with its edge horizontal and perpendicular axis. A dial gauge is fixed to the edge of the faceplate The cross-slide is then moved from along its guides, carrying with it the straightedge across the dial gauge plunger. The second method consists in taking a light finishing cut on a work piece held in the chuck and then checking the straightness of a diameter across the finished surface.

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