DESIGN AND FABRICATION OF STEADY REST FOR LATHE

PROJECT MEMBERSS.RAHUMAN

S.BALAMURUGANK.V.MANOBHARATH

P.VELMURUGAN

UNDER THE GUIDANCE OF Mr.A.BALAJI,M.E.

COMPANY DETAILS

Neyveli Lignite Corporation is one of the major public sector company in India and largest in south.

The Corporation was interested with the task of implementing the integrated Lignite Project comprising the open cast mines and Thermal Station.

The central workshop maintenance yard for all concerns of Neyveli Lignite Corporation enterprise viz., Mine-I, Thermal power station-I, fertilizer unit, and carbonization plant.

UNITS OF NLC LIMITED

MINE-I MINE-I A MINE-II THERMAL POWER STATIONS-I THERMAL POWER STATION- EXPANSIO THERMAL POWER STATION-II

A FEW IMPORTANT JOBS CARRIED OUT ARE

MANUFACTURING AND RECONTIONING OF DRIVE SHAFTS OF B.W.E’S AND CONVEYORS

MACHINING OF LARGE GEAR BOX HOUSINGS.  RECONDITIONING OF HOLLOW SHAFTS OF BUCKET

WHEEL EXCAVATORS.

MANUFACTURING OF 20”DIA PLAIN PIPES AND SLOTTED PIPES .

 

AIM To fabricate the maximum

diameter(380mm) holding steady rest with perfect design for main aspects.

To avoid the delivery time and new part

purchasing .

To reduce the downtime of the rework part adopted machines

STATEMENT OF PROBLEM

304 nos. of important jobs like drive shafts, conveyor idler rollers, cam wheel housing, hollow shafts etc are machined in heavy duty lathes like vertical turret and Lehmann lathes.

They are unable to complete all the jobs on time. Due this job deliver time increased .

Delay in allocation of these jobs due to non availability of machines.

Non availability of suitable steady rest in medium duty lathes for loading jobs.

REASON FOR CHOOSE THIS TITLE Company steady rest available for medium duty

Bombay lathe is maximum 180mm diameter job holding capacity.

Mines department purchased new part when the rework delayed .

so we are decide to make the new steady rest for Bombay lathe to increase the job holding capacity(180mm to 380mm) and reduce the job setting time.

METHODOLOGY

Basically steady rest is one of the jig and fixture of lathe .

It reduces the vibration and eccentricity of job at the time of various operations in lathe. And also one of the support of the job.

The steady size is depends upon the lathe bed width. its size is not exceed to lathe bed width.

The steady rest used to holding the job and it is not affected the job rotation and surface of the job.

DRAWINGS

3D VIEW OF STEADY REST

TIME LINE

December 08

January 09

February 09

Problem Identification, Analysis , Design

Material collection, machining operations

Assembly and Result analysis

Completed Completed -