Royal Mechanical Engineering

1) Investment casting 2) Permanent mold casting 3) Centrifugal casting 4) Continuous casting 5) Sand casting Investment casting Investment casting (known as lost-wax casting in art) is a process that has been practiced for thousands of years, with lost wax process being one of the oldest known metal forming techniques. From 5000 years ago, when bees wax formed the pattern, to today’s high technology waxes, refractory materials and specialist alloys, the castings ensure high quality components are produced with the key benefits of accuracy, repeatability, versatility and integrity. Investment casting derives its name from the fact that the pattern is invested, or surrounded, with a refractory material. The wax patterns require extreme care for they are not strong enough to withstand forces encountered during the mold making. One advantage of investment casting it that the wax can be reused. The process is suitable for repeatable

Manual transmissions use mostly helical gears, but reverse is a special situation that requires a different type of gear - a spur gear. The gears that make up the forward gear ratios are all helical gears. The teeth on helical gears are cut at an angle to the face of the gear. When two teeth on a helical gear system engage, the contact starts at one end of the tooth and gradually spreads as the gears rotate, until the two teeth are in full engagement. This gradual engagement makes helical gears operate much more smoothly and quietly than spur gears. Also, because of the angle of the gear teeth, more teeth are in engagement at any one time. This spreads the load out more and reduces stresses. The only problem with helical gears is that it is hard to slide them in and out of engagement with each other. On a manual transmission the forward gears stay engaged with each other at all times, and collars that are controlled by the shift stick lock different gears to the output sha

There has always been a debate and discussion among all engineering students about which engineering course is the best? Students always love discussing about the best branch of engineering. Though this is a proven fact and it needs no discussion that mechanical engineering is the best still I will be providing 10 reasons over here which make mechanical engineering The Best among all other branches of engineering. 10 reasons why Mechanical Engineering is the best 1) Evergreen Field: Mechanical engineering is an evergreen field. Applications of mechanical engineering have spread over such a wide spectrum that it has penetrated into almost every industry. Mechanical engineering got its application started right from the birth of this universe and it will continue till the end of this universe. 2) Mother Of All Engineering Disciplines : Yeah it’s mother of all engineering disciplines and you know it! Mechanical engineering links all engineering disciplines together and provid

Ultrasonic welding is represented as a friction welding method, where oxides and other contaminants present on the material surfaces are broken up and also the components to be welded are brought together under simultaneous pressure. Molecular bonding, just like the conventional cold-press welding, then takes place. Ultrasonic welding is the conversion of high frequency electrical energy into high frequency mechanical energy. In ultrasonic welding spot welds in thin steels are produced by the local application of high frequency vibrating energy to work pieces held together under pressure. The work pieces are clamped together under a moderate static force applied normal to their face and oscillating shear stresses of ultrasonic frequencies (1 KHz to 40 KHz) with a power ranging of 700 to 6000 watts are applied parallel to the interface. The vibrating probe called “a sonotrode” induces lateral vibrations and slip between the surfaces fracturing the brittle oxide layers and

Although two stroke engines have long since been updated with four stroke racing bike engines, two stroke engines provide a lightweight and suitable solution for racing bikes, motocross and dirt bikes. Earlier on, the two stroke engines in racing bikes were quite popular, but they have since then have been replaced with the four stroke version of the engine. The two stroke engine was a much simpler design, therefore provided a low cost solution for racing teams. The two stroke bike engine operates in two strokes, instead of the normal four stroke Otto cycle. The stages in a two stroke engine are: 1. Power/exhaust stroke: This is the stroke that occurs right after the ignition of the charge, forcing the piston down. After sometime, the top of the piston goes over the exhaust port, with a large amount of the pressurized gases to escape. The downward movement of the piston continues to compress crankcase containing the air, fuel, oil mixture. The top of the piston having pass