Practical Summer Industrial Training at Bharat Electronic (BEL)

We as engineering students are studying theory subjects and some particles. So, that we may not feel short of practical training which will be useful in our job, The University has provided us with a 45 days training slot to help us learn better. Theory along with practical is always good as it makes us learn quickly. The industrial training will help me in securing a job ,I will share some of interesting finding with subscribers of JC-Team 

About Bharat Electronic

        Set up in 1954 for defence electronics, BEL manufactures radars, sonars, communication network, electronic warfare systems, electro optics, tank electronics, broadcasting equipment, components, electronic voting machine, photovoltaic systems and other high tech products. It has nine manufacturing units at different locations of India. BEL spends 4 to 5% of its annual revenue on R & D. 60% of its revenue is from indigenously developed products. It employs 12,390 people including 1200 R & D engineers. BEL has been ranked first among medium-sized aerospace/defence companies worldwide in 2003 & 2004.

        It has come a long way since its inception in 1954 and today is hailed as one of the top professional electronics companies, not just in India but around the world.Profit 2004-05 Rs 4460 million, Revenue Rs 32,120 million.

      

 The special processes in use in the company are Nut Riveting, Helix Coils & special kind of PCB’s.

Why are helix coils used?

• The tank is a very huge and bulky unit. It has to be made of a metal to give it strength and to withstand stress and strain during exercises and war.
• If it is made up of plastic to make it light, it will disintegrate easily.• Hence, to make it light we should use a light metal.
• Aluminium is a metal which is both light and has good mechanical strength.• But, Aluminium is also a very soft metal.
• In a tank assembly various fastners would be required.To repair and for testing purpose they would be required to be again & again fastened or loosened. This   can damage the soft Aluminium and hence cause the holes to expand.

Importance of Nut Riveting 

• Nut riveting is a special type of riveting only used for defense purpose.
• The tank is fast becoming more & more dependent on electronics.
• A tank has to move through various terrains. It could be rough or smooth, uneven or mountainous.
• The connections on the PCB should not break during operation which could lead to the failure of the whole system.•    To avoid this nut riveting is used.
• It is a special type of rivet which is tapered from the bottom to lock into the PCB and hence make the connection permanent.
• This riveting can also be used when we have very thin thread or no possible access to nuts through the other side.

Assembly Area Stabilizer 

     If we try and position the barrel of a gun, according to Newton’s 3rd law the gun will take some time to position itself which can be fatal in a war situation. So, stablizers are used.In the assembly area the stablizers are assembled.

        The various parts of a stabilizer are:

1.     K1
2.     K2
3.     Frequency Stablizers
4.     Gun Setting Device
5.     Block Relays
6.     Hydraulic Traverse
7.     Hydraulic Elevation                                        

Tank Intercom System

R-174 (MK-II) is indigenous version of Russian equipment meant for intercommunication between crew members through radio designed for compatability with radio sets R-173 & other CNR, STARS-I, TADIRAN.

•The following sub units are used for maximum configuration-

1.     Main Control Unit, AC34
2.     Operating Control Unit, AC35
3.     Matching Amplifier Unit, AC37
4.     Line Communication Unit, AC38
5.     Chest Switch, MH1
6.     Interconnecting Cables

 

Instruments Calibrated

1.    Digital Multimeter

2.    Oscilloscope

3.    Function Generator

4.    Distortion & Audio Analyzer

5.    Power Supply

6.    Thermometer

7.    Break down Tester

8.    High Resistance Meter

9.    Frequency Counter

10.    XY Graphic Recorder

11.    Power Meter

12.    Synchronous Meter

13.    Resolver Meter

14.    Dynamic Signal Analyzer

15.    Control System Analyzer

16.    Spectrum Analyzer

It gives me immense pleasure to write that my practical training was completed successfully. I hope this unique opportunity provided to me by The University  will in future help me in gelling with my colleagues & doing team work. I also learned to abide by the rules and regulations of industries & how to present myself towards my seniors. I hope I can help my country in the near future to go ahead of other countries and develop.