NORTH WESTERN RAILWAY, JAIPUR

BY AWANISH KUMAR13EJAME014

-: CONTENT :-

1. Introduction2. Organisation Structure3. North Western Railway4. Wheels5. Machine Shop6. Breaking System7. Bogie Shop8. Spring Shop

-: INDIAN RAILWAY :-

First passenger train introduced in India on 16 April 1853 between Mumbai to Thane (34 km).

Over 10,000 trains daily, transporting over 8,900 million passengers and over 1050 million tones of freight per year.

Indian Railways is the world's ninth largest organisation, by number of employees, with over 1.4 million employees.

As of 31 March 2013, 23,541 km (36%) of the total 65,000 km route length was electrified.

The number of zones in Indian Railways increased from six to eight in 1951, nine in 1952 and sixteen in 2003. Presently there are 17 zones & 84 divisions.

INTRODUCTION

Name Abbr. HeadquartersCentral Railway CR MumbaiEastern Railway ER KolkataEast Central Railway ECR HajipurEast Coast Railway ECoR BhubaneswarKonkan Railway KR PanvelNorthern Railway NR DelhiNorth Central Railway NCR AllahabadNorth Western Railway NWR JaipurNorth Eastern Railway NER GorakhpurNortheast Frontier Railway NFR Maligaon(Guwahati)Southern Railway SR ChennaiSouth Central Railway SCR SecunderabadSouth Eastern Railway SER KolkataSouth East Central Railway SECR Bilaspur, CGSouth Western Railway SWR HubliWestern Railway WR MumbaiWest Central Railway WCR JabalpurKolkata Metro KMR Kolkata

ZONES OF INDIAN RAILWAY

Department Of Indian Railway

Sr. No.

Name of Department Role And Function

1. Engineering DepartmentMaintenance of all Fixed Assets

2. Mechanical Engineering & power Department

Maintenance of all Rolling Stock of the division

3. Electrical Engineering Department

Maintenance of all electric locomotives

4. Signal & Telecommunication Engg. Department

Maintenance of the Signaling & Telecommunication

5. Operation and Traffic Department Train operations6. Commercial Department Passenger

Ticketing, Ticket checking, booking of freight rakes, collecting fare

Department Of Indian Railway

S.No.

Name of Department Role And Function

7. Medical Department Providing Medical Facility to Railway employee & their Family too.

8. Safety Department Ensuring safety of Train operations

9. Store Department Ensuring material for maintenance of Trains

10. Account Department Financial management of the division

11. Security Department Security of Railway material, passenger and passenger belonging

12. Personnel Department HR Function

Reporting mark : N.W.R Founded : 1st Oct. 2002 Headquarters : Jaipur, Rajasthan General Manager : Anil Singhal Track Gauge : 1,676mm (5 ft. 6in)- Broad Gauge :1000mm(3ft.3 3/8in) – Meter Gauge Length : 6559.546  Station : 578 Division : 4 Website : http://www.nwr.indianrailways.gov.in/

Map Of North Western Railway

IN THIS SHOP, REPAIR WORK OF THE WHEEL AND AXEL IS UNDER TAKEN. AS IT IS KNOWN THAT, THE WHEEL WEARS THROUGHOUT ITS LIFE.

WHEEL

Type

Wheel dia.(mm)

Distance b/w journal center (mm)

Journal size(mm)

Axel wheel seat dia. (mm)

ICF 915 2159 120*113.5 172,0.25,0.35BMEL

915 2210.2 120*179 171,0.45,0.63The diameter of new wheel is-( Table 3.1 list of wheels dimension )

Wheel testing & machining

Axial journal testing lathe

In this shop wheel sets are removed from the bogies, the entire wheel is first inspected for assessing the condition of the component of wheel such as axel trial wheel disc and guttering.

The shop consist of- 1. Axel journal testing lathe. 2. Hydraulic wheel press with facility of mounting. 3. Vertical turning lathe. Hydraulic wheel presses with a

facility of mounting

Vertical turning lathe

External and internal diameter is corrected by this lathe; wheel is tightened on the rotating clutch. The stationary is carbide tool cut the wheel to correct diameter.

-: THE MAINTENANCE SCHEDULES AND THE OVERHAULING PERIODS :-1. Trip schedule- After every trip by primary maintenance depot. 2. Schedule A - Monthly (1 month ) 3. Schedule B - Quarterly (3 months ) 4. IOH – 9 months5. POH – 18 months

Periodic overhauling is the best available process of maintenance of coaches in India. This generally operated after 18 months after the manufacturing or the previous periodic overhauling done in any workshop. This undergoes a huge process of lifting the coach, isolating the all parts, and changing or replacing the necessary or damaged parts. In other words this is the process of renewing the coaches.

> POH <

-It stands for periodic overhauling. -POH is allowed in nominated workshops only.-Painting of whole coach is necessary. -Profiling of wheel is necessary

-: WHEEL PROFILE :-

-: DEFECTS :- Thin Flange :- When the flange thickness reduces from 28.5 mm to 16 mm or less, then the flange is called thin flange.Sharp Flange :- When the radius given at the tip of flange is worn out from 14.5mm to 5 mm or less is called Sharp Flange. Thin Tyre :- If the remaining thickness of tyre is less than 25 mm, it is called thin tyre.

Hollow Tyre :- If the groove on the wheel tread is up to 5 mm or more, it is called Hollow tyre.

MACHINE SHOP

Machines are two types…1. AUTOMATIC.2. MANUALLY.

 There are three types of automatic machine.

• Numerical control.• Computer numerical control.• Direct numerical control machine.

Automatic Control

Computer Numerical Control

Manually Operated Machine

Drilling operation is carried out here. A large for the operation .To complete the operation faster a few gauge milling machine are also provides.

All the lathes have four jaws chuck for better holding centering is done either manually or with the help of universal scriber. All kinds of turning are performed here.

Drilling Section Centre Lathe Section

Manually Operated Machine

The machine is also called horizontal shaping machine. It works on quick-return mechanism .The arm of shaper reciprocating horizontal. The cutting takes place only in the forward stroke.

The is vertical shaping machine .The arm reciprocating in the vertical direction. Most parts are the same as shaper .

Shaper Slotter

BREAKING SYSTEM BRAKING SYSTEM

In Air Brake system compressed air is used for operating the brake system. The locomotive compressor charges the feed pipe and the brake pipes throughout the length of the train. The feed pipe is connected to the auxiliary reservoirs and the brake pipe is connected to the brake cylinders through the distributor valve. Brake application takes place by dropping the pressure in the brake pipe.

-: AXLE :-

It is the main long cylindrical bar on which bogie are fixed with the help of bearings. This is made of steel as above. Each axle contains 2 wheels, the brake cylinders are also attached to it and in case of LHB coaches, the braking discs are fixed on to the axle.

The axle mounted brake disc consists of a gray cast iron friction ring and a cast steel hub, connected by means of radially arranged elastic resilient sleeves which are secured in the hub by means of hexagon screws. The friction ring is manufactured as a solid component or in a split version. In the latter case, the two halves are held together by two tight –fit screws. DISC

-: AIR BRAKE SYSTEM :- The brake system in which compressed air is used in the

brake cylinder for the application of brakes is called air brake system.

MAIN COMPONENTS :-Control Reservoir 9 liter, 5 kg/cm2 Auxiliary Reservoir 200 liter, 6 kg/cm2Brake pipe – Dia. 32 mm Feed Pipe – Dia. 25 mm

-: BRAKE SHOE :-The brake shoe is provided with a brake pad holder carrying replaceable pads.

The brake shoe consists of the brake pad holder, the vertical pins and the brake pad.

SHOESDue to BC pressure, the piston moves forward and strikes against the brake caliper.

The lever arm of the brake caliper presses onto the disc brake through the brake shoe.

The disc brakes are mounted on the wheel axle and so rotate along with the wheels.

Due to application of brake shoes, the discs begin to lose their angular speed.

As a result the axle also begins to slow down since the two are connected.

Ultimately, the wheels stop rotating as they are mounted on the same axle.

1.Bogie frame longitudinal component 2. Cross-beam

BOGIE SHOP

The frame is made up of two longitudinal components………

(1) connected by two cross-beams (2) which also support the brake units. The various supports which connect the different bogie components are welded to the frame.

FLOW PROCESS OF A BCNHL WAGON

During welding in a BCNHL wagon various welding techniques are used like flat welding, horizontal welding, vertical welding,overhead welding, etc. But it is always preferred to weld as flat welding. So wherever possible, by using manipulators,work piece is so adjusted that it can be welded as flat or horizontal. It increases the efficiency of worker and it is also safe to do.

(Fig 6.7 fixed manipulator)

-: WINDOW UNITS :- The sealed window units consist of 8.4 mm outer glass and 4 mm inner glass with 6 mm Argon gas filled.

Argon is an inexpensive, non-toxic, odorless gas . It increase sound proofing characteristics of the window. Minimizes heat exchange through the window. Argon will not corrode the window material. This type of windows can even block ultraviolet rays.

SPRING SHOP• In this section the helical is prepared. For this purpose there certain

machine for testing, grading and repairing it.

Visual and magnetic crack detectionCAUSE PERCENTAGE OF FAILURE

Free of height 8.93%

Load test 82.08%Dent mark, corrosion & breakage 08.39%

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