KNOW WHY FILLETS ARE PREFERRED ON EDGES !!

In mechanical engineering a fillet is a rounding of the interior or exterior corner of a part. On the inlet fillets are concave while on exterior corners these are convex.We generally use fillet on the edges of almost every product.In this article we will see why fillets are used at corners.

We generally use fillets due to following reasons:

1.)Fillets are mainly used to reduce stress concentration compared to chamfers. These can easily distribute stress more uniformly.

2.)Fillets give a part better flow and less resistance. Using a fillet also eliminates any sharp edges that can be easily damaged, or that could cause injury when the part is handled. This means there is less risk of failing an inspection for having a burr or sharp edge.

3.)Industrial designers tend to prefer fillets compared to chamfers as these are considered to be visually pleasing.

4.)One of the other reasons is that protective coating like paint are more uniformly distributed over a fillet compared to chamfer. Thickness of coating is reduced on sharp corners of chamfers so coating is lost first on these spots. Fillets have no such issues due to uniform distribution of coating.

But when it comes to comparison with chamfer in terms of cost then fillet is costly due to following reasons:

1.)A chamfer requires less machining time that a fillet radius.

2.)For fillets different radii of tools has to be stocked to create different radii, but a single tool can be used for creating different chamfers.

Still fillets are more preferred as compared to chamfers by industrial designers due to its advantages.Comment down your views in comment box.

KNOW THE FUNCTION OF LINES ON REAR WINDSHIELD !!

You have probably noticed the lines on the rear windshield of your vehicle.Have you ever wondered what those thin lines running across the length of your rear window are for? We will discuss about these lines in this post.

These lines are called defoggers. These lines are electrified filaments which dissipate heat in the case your rear windows begins to fog up.A small current is passed through those embedded wires or lines, and as the current is conducted, it heats up the glass slightly—just enough to melt any snow or ice blocking your view, or eliminating any fog/condensation that was built up.Your front windshield comes equipped with defoggers, too. But since driving with a bunch of thin lines obstructing your view probably isn't ideal, it instead comes in the form of vents near the base of the glass.

All of these small details on a car may not seem to add up to much, but they are integral to the safety and comfort of the passengers, as well as the structural integrity of the vehicle itself. Next time you sit down for a long drive, pay attention to those tiny details and be grateful that someone in the car manufacturing industry thinks about the small stuff!

DIFFERENCE BETWEEN FORCE AND PRESSURE EXPLAINED !!

Force and Pressure are the two important concepts of physics which are often erroneously interchanged by the people. But, these two are not same at all, as there is a vast difference between force and pressure,we will discuss about the difference between them in this post.

FORCE:

Force is the pull or push on an object which can change the velocity of the object on which it is applied. We can say that if force is applied on an object from one direction and there is no opposing force, then the object will move. If it’s already moving, it will either get faster or slower depending upon the direction of the applied force.

PRESSURE:

Pressure can be explained as force applied on a unit area.When the force is applied over a large area, then the pressure developed.

Now have you ever wondered, why tools which are made to cut, chop, trim or pierce always have sharp edges? Or why heavy vehicles always have fat tyres? This is only due to pressure, which refers to the physical force per unit area.

The difference between force and pressure is summarized in the table given below:

 

WHY SMALLER WHEELS ARE USED IN SCOOTERS ?? KNOW HERE !!

Scooters are often used as a way to get around that’s both good on fuel as well as easy on the pocket. They generally weight less than motorcycles but are also slower. However, the type of wheels that you have on a scooter, whether they’re big or small, can make a lot of difference.

More common these days are that scooters are getting 12” and 13” inch wheels. So what is the advantage? 

Using small tyres in a scooter provides additional space between the seat and tyre, where you can mount the engine and transmission. Because of small size only, this space is available. Hence the scooter is compact, has under seat storage and space at front for keeping your legs and goods.

Also, small wheels and tyres helps in incredibly quick steering. But again it leads to poor handling at higher speed.

So,the main reason for giving smaller wheels to scooters is to reduce the weight of the vehicle, increase the space requirement, and to offer a great manuvarity in city traffic.When it comes to poor handling at higher speed, scooters are not designed to run at high speed that is why smaller wheels are provided.

WHY TRACTORS HAVE 2 BRAKE PEDALS? CHECK OUT HERE !!

Tractors are equipped with 2 brake pedals. There is a specific reason behind this. 

In tractors, each pedal controls one side of the tractors rear-drive wheel.y using one pedal this allows the tractor to lock that wheel on the spot forcing the other rear-drive wheel to swing in an arch around the locked wheel.

During filed operations, a tractor should take a turn as minimum radius as possible. So, two brakes are provided in tractor because by pressing left side brake, left wheel stops rotating, the right wheel rotates around left wheel and vice-versa. Thus, turning radius decreases. A simple mechanism always provided in the tractor to lock both brakes for on-road operations to avoid accidents. Below figure shows two brakes with locking mechanism. B and C are two brakes for each wheel, while A is locking mechanism.

WHY MAHINDRA VEHICLE NAME ENDS WITH "O" ? KNOW HERE !

Not many would have realized that every Mahindra product ends with an 'O' - Bolero, Scorpio, Xylo, Quanto, Verito, and even the XUV500 and TUV300, pronounced five double 'oh' and three double 'oh'. Take even the motorcycles that Mahindra manufactures - Panter(o), Moj(o), Gust(o), Dur(o), Rode(o), and so on.

WHAT IS THE REASON BEHIND THIS?

The Scorpio and the Bolero were two of Mahindra's greatest success stories. Pawan Goenka, president, automotive and farm equipment sector, Mahindra & Mahindra, says after the success of Bolero and Scorpio, the company thought the 'O' at the end of the vehicle was lucky and decided to stick with it.

"You can call it a bit of superstition, but it has worked for us. It has become a tradition for us and it is now an expectation from M&M to follow that practice. Thanks to this, people easily identify an M&M product," Goenka said. Since both the vehicles end with an 'O', Mahindra just thought it was lucky, so decided to name all the vehicles based on that. You can call it superstitious in a way, but thinking practically, it also makes the vehicles sound uniform, maintaining a pattern.

Even the commercial vehicles made by Mahindra follow the invisible rule of ending with an 'O' - Maxximo, Jeeto, Supro, and Truxo. Another interesting thing to note is that the letter 'O' is the fourth most common letter used in the English language.

But the new 2018 Mahindra Alturas G4 doesn’t ends with ‘O’ and also does the Thar.

KNOW HOW A CAR ACCELERATES ?

Going from 0 to 60 mainly involves the throttle, engine, transmission or differential, and tires of a vehicle. How fast it takes depends on the features of these parts.When you hit the gas pedal/throttle on your vehicle, there are a number of forces at play to get it going. 

Here is a basic run-down of what happens when your vehicle accelerates.

1.)Throttle to engine

The throttle pedal/throttle is a direct line to your vehicle’s engine. It controls the airflow into the intake manifold either through a throttle body for fuel injection, or a carburetor. This air is then mixed with fuel, fed either by a fuel rail and fuel injectors, or a carburetor, and is then introduced with spark (such as fire), fed by spark plugs. This causes combustion, which forces the engine’s pistons down to rotate the crankshaft. As the throttle pedal gets closer to the floor(full throttlr in case of motorbikes), the more air is sucked into the intake manifold to be mixed with even more fuel to rotate the crankshaft faster. This is your engine “revving” as the revolutions per minute (rpm) of the crankshaft increase.

2.)Engine to transmission

If an engine’s crankshaft output shaft is not connected to anything, it will simply rev and make noise - not acceleration. This is where a transmission comes into play, as it helps transform engine speed into wheel speed. Regardless of whether you have a manual or an automatic transmission, both varieties tap into the engine via an input shaft. Sandwiched between the engine and the transmission is either a clutch for manual transmissions, or a torque converter for automatics. In essence, a clutch and engages the engine from the transmission, while a torque converter maintains the connection but uses a fluid-fed one-way stator and a turbine to eliminate engine stalling when idle. Think of it as a device that is constantly “slipping” the connection between the engine and the transmission.

And from transmission the motion goes to tyres in case of motorbikes through chain or belt and in case of cars, it will go to differential and from differential it will go to tyres.