Amanyadavnbc.ppt

SUBMITTED TO

SUBMITTED BY

Sulabh Nalwaya Aman Yadav

Introduction of NBCWhat NBC produce?Various sectionHeat treatment processBall bearing grindingDresser for grinding wheel dressingBall bearing assembly

NBC is the biggest, bearing industry of India.

NATIONAL ENGINEERING INDUSTRIES LTD., JAIPUR was founded in the year 1946 as a pioneer industry in the field of bearing manufacture by the renowned industrialist, Late Mr. B.M. Birla, under the name of "National Bearing Company Limited".

NEI has the distinctions of being one of the ten manufacturers of bearing world who produced large diameter bearing up to 2000mm Diameter.

NBC manufacturing wide variety and range of bearings such as Ball Bearings, Steel Balls, Tapered Roller Bearings, Cylindrical Roller Bearings & Axle Boxes for Railway and Large Diameter special Bearings in separate fully equipped factories.

BALL BEARINGS: - Radial Ball Bearing Angular Contact Bearing Self Aligning Two Row Ball

Bearing Belt tensione

TAPERED ROLLER BEARING: - Single Row & Double Row Tapered Roller

Bearing

LARGE DIA SPECIAL BEARING: - Single Row Double Row Ball, Cylindrical and Four Row Tapered Roller Bearing Thrust Bearing

SPHERICAL ROLLER BEARING: - Railway bearing

Railway bearing dptt.Ball bearing Dptt.Roller tapper Dptt.Machine bearing dptt. Ball dptt.Large diameter bearing dptt.Research development dptt.Forging dptt.

FLOW CHART OF CHUGAI-RO FURNACEJOB

/PRE WASHING(60°C)

/HARDENING BY ENDO (AIR+LPG+CATALYST)

/ZONE 1ST (840°C)

/ZONE 2ND (850°C)

/ZONE 3RD (850°C)

/ZONE 4TH (850°C)

/QUENCHING IN OIL TANK AT 120°C, MIXING IS DONE BY

AN AGITATOR/

AIR COOLING/

COOLING FROM WATER AND AIR/

TEMPERING IN A FURNACE AT 170°C (90 MINUTES)/

AIR COOLING

7

1. Deep groove (Conrad) bearing

8

2. Filling notch or maximum capacity ball bearings

Notch

9

3. Angular contact bearings (AC)

Extra support in the back

Direction of thrust

Facing OD Grinding OR Track Grinding OR Track Honing IR Track Grinding.Bore grinding.IR Track Honing.Washing

The face grinding machine is employed to face the outer and inner races of bearing material by the application of two grind wheels. The coolant which is used for this process is water soluble chemical coolant.

The center less grinding machine is used for this process (MICRON MACHINE). It uses a grinding wheel whose maximum speed is 2700 rpm and wheel size is 405 mm. This machine removes the material from the outer diameter of both the inner and outer races with the action of grind wheel.

The process removes the material from the track of the outer race. A grinding wheel is used in this process.

This process is accomplished with the help of a special grinding machine where the surface of outer race is super finished with the help of specific stones

This process is accomplished with the help of grinding machine. Here the track of inner races is grinded so as to achieve the required finish. Oil is used as a coolant.

The bearing is now subjected to the bore grinding machine where the material is removed from the bore of the bearing job.

The coolant is water soluble chemical.

This process is accomplished with the help of a special grinding machine where the surface of inner and outer races of bearing job are polished from both surfaces and oil is used as a coolant.

After the grinding process the inner and outer races are washed before sending them for the assembly.