R & D Engineer

02/10/2017

Happy Birthday Gandhi

22/10/2016

22/10/2016

25/09/2016

BEARING AND ITS TYPE
What is Bearing? What are Main Types of Bearings?

Bearing is a machine element that have constrained relative motions and used to reduces friction between moving parts of machine to obtain desired
motion or we can say that the machine elements which are support the rotating parts of a machine and reduce friction are called bearings. For example to stop deviation in a shaft of a machine while rotating, a bearing is used.

The word bearing is derived from the verb “to bear”. A bearing is a machine element that allows one part to bear another. The main functions of bearings are

To reduce friction between moving rotatory parts.
To support rotating parts of a machine.
To bear radial and thrust load.

Types of bearings:

According to design, load and shape, there are many types of bearings used in industries. The mains bearings can be classified as follows.

According to the Friction:
on the basis of friction bearings are classified as

1. Friction bearing:
As the name implies, in this bearings the bearing surface is in contact with moving surface or the shaft which produces more friction. These bearing are made up of cast iron, bronze, brass, baibit and white metal having hollow round shape. Lubricant is used for slow moving and heavy weighted running on shaft. These bearings to support crack shaft, rocker arm of IC engine. Friction bearing are also subdivided into following types

(A.)Solid bearings:
It is a simplest hole made in cast iron to support the shaft and form running fit. These are made up of cast iron or bronze in the form of bush and press-fitted in fabricated or cast iron housings. This is used for small and light shafts moving at low speed. A hole is provided on its face of lubrication.

(B.)Split bearings:
Split bearings are same like solid bearings but have an arrangement of split. Split bearings are made in halves and assembled in special plumber blocks. It has collar on its external surfaces and also made in two parts as shown in figure.

(C.)Self-aligning bush bearings:
It consist mainly two parts. The first one is cast iron block and other is bush. These bearing bush are made up of brass or any other soft material in round shape. To protect it from moving, a screw is fixed at one end and this screw is fixed half to the bush and half in block.

(D.)Adjustable slide bearings:
It can adjust the tightness between bearings and the shaft. This type of bearing has provision for wear adjustment. The bearing is fitted in the tapered hole of the housing for adjustment of wear. The bearing is drawn inside by means of a slotted ring nut.

Advantages and disadvantages of friction bearings:

Advantages:
Friction bearings are cheap to produce and have noiseless operation.
They can be easily machined, occupy small radial space and have vibration damping properties.
They can cope with tapped to the foreign matter.

Disadvantages:
It damages machines.
It restricts early movement of machine
It produces a lot of heat energy.

2. Anti-friction bearing:

The main purpose of these bearings is to minimize the friction in bearing. Due to this reason, the speed of an object increases and friction and temperature decreases. Such bearing have long life. These bearing also sub-divided into following categories.

(A.)Ball bearings:
A ball bearing is a rolling element bearing that used ball to maintain the separation between the bearing races. The width of these bearing is smaller than the bore diameter or ball. On the basis of load and groove cut, ball bearings are classified in the following types.

(a.)Single row ball bearings:
These bearing have only one groove cut in outer and inner rings with the ball in identical line.

(b.)Double row ball bearing:
These bearing have two grooves cut in inner and outer rings lie in two rows of the bearing.

(c.)Self-aligning ball bearings:
These bearings can withstand with journal loads. These loads are generally inclined due to shaft mis

24/09/2016

DIFFERENCE BETWEEN FORGING AND CASTING
Casting and forging are both industrial processes of metal forming and shaping. Different process used in different conditions. The main difference between casting and forging is that the metal is compulsory to heat and convert
into liquid stage in casting but in forging metal is converted into desire shape by applying pressure with or without applying heat. If the metal is preheated into forging it does not convert into liquid stage. But before differentiate this both terms; you have to know about what is casting and what is forging.

Forging vs Casting:

What is casting?

Casting is a process in which metal is heated until molten stage and pour this liquid metal into a mold or cavity where it is allow solidifying. This process converts the metal into desire shape. It is useful to make complex structure. Most of the industrial structures parts are like lathe machine bed, milling machine bed make big base of other machinery part, IC engine components etc. are made by this process.

Advantages of Casting
This process can form very large structure which is impossible to form by other process.
It can make any complex and unsymmetrical structure.
The structure formed by this process has high compressive strength.
It can attain wide range of properties.
This process can attain high accuracy.

What is forging?

On the other hand forging is the process of converting metal into desire shape by applying pressure and with or without heat. When the metal is heated before applying pressure the process is called hot forging. In forging metal is heated before below critical temperature or below molten stage. Rolling, pressing, Wire drawing etc. is various types of forging. All sheets, small component, wire etc are formed by this process.

Advantages of Forging:
It produces tougher product compare to other.
The product made by forging has high impact or tensile strength.

10/06/2016

Advantages & Disadvantages of being a Design Engineer
How it is to be a Design Engineer? Working with drawings, reading standards and design references, tired sitting long hours on desk, frustrating when not finding a fix for your design, angry about the stupid changes people want in your design or something more. I found some more ins and outs, positives and negatives of being a design engineer. Let us start with the negatives first and then positives so that final taste of the article remains good… But do not worry, if you are a design engineer like me, positives are more than the negatives.
Ever changing standards
Standards and information are ever changing in the design world and most of the time you need a professional engineer certification renewal after some years. New changes are usually tough and you have to implement them on your entire system.
High stress level
Stress level for a design engineer is usually high as compared to the average stress level for different jobs. There are always deadlines and pressure of completing the job as per requirement. Project work can call for long hours to meet deadlines.
You have to tolerate your belly tire
Design is done most of the time sitting in front of computers using software, doing lengthy calculations. It all makes your life sluggish and slowly as your design experience grows, your belly tire also grows with it. You should not mind if someone guesses your design experience with the size of it.
You have to know a lot
If you are a design engineer, you are expected to know every bit of engineering from A to Z. You should have a solution in your pocket for each and every technical problem your company may face. Otherwise you can hear this, “you do not know this! what kind of design engineer you are?”
Keep yourself up to date
You have to study a lot to keep you up to date with the changing information and knowledge. You read new research, see new techniques, learn new updates in your design software and much more. This is an endless journey.
It may be boring
Every one subconsciously or consciously wants to impress others especially the others from opposite s*x. If you think for creating that kind of impression, design engineering is not for you as number of females is almost zero in this field, compared to some other fields.
You may fall in love with your design
When you design something, you got attached with it. It is like your baby but the love can be dangerous and can create a lot of frustration for you. Frustration can come when a design change is requested from the customer or your boss and you find the change not less than a bu****it. Ironically, such type of requests come when you have almost done your design. Sometime there is a genuine need of change in your design but you are not able to sense the need of it as you are fascinated by your design. Such situation comes mostly in your 3D Design work.
Virtual world of Design
Your design is all in your paper work or in some design software and you will feel time to time what it will be in the real world. The virtual world of design is frustrating most of the time.
It comes with liability
All the solutions and designs given by you comes with liability. What if your design fails, the minimum loss may be of some capital and your reputation in the company.
Now let us see the positive side of it
Innovation and creation
If you love innovation and creativity then design engineering is for you.You will feel like an artist while doing your design work.
High level of pay scale
The salary of a design engineer is good and above average. In US, it may fall in the range of 48 to 105 K per year. Good haan!
You would love a big city life
Jobs of a design engineer are mostly in head offices of the companies and you would likely enjoy your life in a cosmopolitan city. There is no issue with the education of your children and there may be many more perks out of it.

Power of knowledge

Design engineer means knowledge and skills with a continuous increase in them and soon you would start feeling the power of it.

High number of jobs

Design engineers are needed in a wide variety of industries, and availability of job is high. You may have a good chance of switching your job if you want a change. Reasons for switching a job are many and with a smart move results are usually fruitful.

Feel of satisfaction

Most of the time, everyone will look at you whenever there is any technical issue in your company. You are the knowledge base of your company and you will enjoy feeling like a backbone of your company.

You would end up as entrepreneur

Roughly 22% of design engineers have their own business. If you want to be one of them, design engineering is the field for you.

I want to stay home

There is an increase in trend of outsourcing the design work. Reasons are many, fact is outsourcing your design works is very beneficial if done tactfully. if you are a design engineer you can start your design work from your home based office, doing the work for different design engineering firms throughout the world.

28/03/2016

``A designer must be able to trade
[modeling/simulation/analysis] accuracy for cost during [engineering] design.''

28/03/2016

``Scientists investigate that which already is;
Engineers create that which has never been.''

28/03/2016

``Science is the study of what Is,
Engineering builds what Will Be.''

``The scientist merely explores
that which exists,
while the engineer creates
what has never existed before.''

21/03/2016

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www.only4engineer.com

Engineering free e-book, study-materials, previous year questions, exam tips for ECE,CSE, ME,CE,IT.EE and others branch

09/03/2016

"Design can be art. Design can be aesthetics. Design is so simple, that's why it is so complicated."

09/03/2016

"Good design is the most important way to differentiate ourselves from our competitors."