LEEVENSPARK

This type of power screw is used for high  speed high efficiency applications, and is  becoming more common. It has become  popular because it is essential in CNC, as well as robots and aircraft actuators. The ball screw assembly is as shown below and includes a circular shaped groove cut in a helix on the shaft. The ball nut also includes an internal circular shaped groove which matches the shaft groove. The nut is retained in position on the shaft by balls moving within the groove. When the nut rotates relative to the shaft the balls move in one direction along the groove supporting any axial load. When the balls reach one end of the nut they are directed back to the other end via ball guides. The balls are therefore being continuously recirculated. The recirculated ball screw has the following advantages and disadvantages to the conventional threaded power screws:  Advantages: ...

Well,many of will be thinking that HOW AEROPLANES FLY??,Same question strike in my mind,so here is the answer for you guys. Drop a stone into the ocean and it will sink into the deep. Chuck a stone off the side of a mountain and it will plummet as well. Sure, steel ships can float and even very heavy airplanes can fly, but to achieve flight, you have to exploit the four basic aerodynamic fo rces: lift, weight, thrust and drag. You can think of them as four arms holding the plane in the air, each pushing from a different direction. First, let's examine thrust and drag. Thrust, whether caused by a propeller or a jet engine, is the aerodynamic force that pushes or pulls the airplane forward through space. The opposing aerodynamic force is drag, or the friction that resists the motion of an object moving through a fluid (or immobile in a moving fluid, as occurs when you fly a kite).If you stick your hand out of a car window while moving, you'll experience a very simple demon...

A clutch is a mechanical device that provides for the transmission of power (and therefore usually motion) from one component (the driving member) to another (the driven member) when engaged, but can be disengaged. Clutches are used whenever the transmission of power or motion needs to be controlled either in amount or over time (e.g., electric screwdrivers limit how much torque is transm itted through use of a clutch; clutches control whether automobiles transmit engine power to the wheels). In the simplest application, clutches are employed in devices which have two rotating shafts (drive shaft or line shaft). In these devices, one shaft is typically attached to a motor or other power unit (the driving member) while the other shaft (the driven member) provides output power for work to be done. In a torque-controlled drill, for instance, one shaft is driven by a motor and the other drives a drill chuck. The clutch connects the two shafts so that they may be locked together and s...

Surface tension is a contractive tendency of the surface of a liquid that allows it to resist an external force. It is revealed, for example, in the floating of some objects on the surface of water, even though they are denser than water, and in the ability of some insects (e.g. water striders) to run on the water surface. This property is caused by cohesion of similar molecules,  and is responsible for many of the behaviors of liquids. Surface tension has the dimension of force per unit length, or of energy per unit area. The two are equivalent—but when referring to energy per unit of area, people use the term surface energy—which is a more general term in the sense that it applies also to solids and not just liquids.The cohesive forces among liquid molecules are responsible for the phenomenon of surface tension. In the bulk of the liquid, each molecule is pulled equally in every direction by neighboring liquid molecules, resulting in a net force of zero.

Thanks to gyros, accelero meters  and sophisticated control  mechanisms, remaining upright on  a two-wheeled vehicle is no longer  quite the balancing act it might  once have been, even when at a  standstill. Visions of future mobility  like Honda's U3-X take such ideas  in whole new directions, quite  literally, by including multi- directional capabilities, and  concepts such as Supple go even  further still by ditching wheels  altogether in favor of balls. It's this  freedom of movement that inspired  a group of students from the  Charles W Davidson College Of  Engineering at San Jose State  University to begin work on the  ambitious Spherical Drive System  (SDS) electric motorcycle. The SDS concept vehicle is described as a self-balancing electric motorcycle that rides on spheres. Rather than using the kind of mechanical gyros that help keep the Gyrobike or...

Next week Audi will debut their prototype Wörthersee e-bike, which promises to be a highly advanced, versatile electric bike from the German automakers. The Audi e-bike will be unveiled at Wörthersee in Carinthia, Austria where trial biker Julien Dupont and downhill specialist Petra Bernhard will demonstrate their stunts and streetbike skills. “As a high-performance e-bike for sports and trick cyc ling, it features the Audi core competences of design, ultra, e-tron and connect,” stated Audi’s Head of Design Wolfgang Egger. weighs 24 pounds and features a compact frame made of carbon fiber-reinforced polymer with a low center of gravity to make it superbly agile. The same carbon fiber-reinforced polymer is also used for the 26″ wheels which feature an innovative “Audi ultra blade” design with broad flat spokes for an optimized transmission of pedal power. The 2.3 kW electric motor sends up to 184 lb-ft. of torque to the rear wheel and uses a lithium-ion battery that only need...

Mechanical engineering is a discipline of engineering that applies the principles of physics and materials science for analysis, design, manufacturing, and maintenance of mechanical systems. It is the branch of engineering that involves the production and usage of heat and mechanical power for the design, production, and operation of machine s and tools. It is one of the oldest and broadest engineering disciplines. The engineering field requires an understanding of core concepts including mechanics, kinematics, thermodynamics, materials science, and structural analysis. Mechanical engineers use these core principles along with tools like computer-aided engineering and product lifecycle management to design and analyze manufacturing plants, industrial equipment and machinery, heating and cooling systems, transport systems, aircraft, watercraft, robotics, medical devices and more. Mechanical engineering emerged as a field during the industrial revolution in Europe in the 1...

MARK ZUCKERBURG GETS MARRIED!In a surprise ceremony, Facebook CEOand founder Mark Zuckerberg marriedhis longtime girlfriend, Priscilla Chan,in a private wedding at his home inPalo Alto California on Saturday.Zuckerberg, who just became abillionaire as a result of the FacebookIPO on Friday, reportedly placed a ringon his wife’s finger during theceremony — the ring was describedas featuring a “very  simple ruby.”According to the Associated Press,Zuckerberg’s marriage to PriscillaChan took place in front of about 100invited guests who thought they werecelebrating Ms. Chan’s medical schoolgraduation. It all happened inZuckerberg’s backyard.Take a look at Zuckerberg’s personalpage on Facebook, and you’ll see theabove picture, which Zuckerbergreportedly placed onto his own site asa change of his status after theceremony.The couple met while both wereattending Harvard, and have beentogether for nine years. —

Awesome work done by mechanical engineers.The Real Grass-roots Innovation by Indian wins Best Product Design!This winning product was made at a minuscule cost of Rs. 300 and has potential to affect lives of millions of people across the globe.  Project Goal:“Load carrier for labor” project aims to improve the working condition of laborers and wo rkers at many places globally like construction site, factories, ports, railway stations, etc.Objective:  The objective is to prevent various occupational hazards and demonstrating Product design and ergonomic consideration in welfare of human life.This is called Real Engineering..

maximum mechanical engineers and the mechanical students are having the innovative thinking and has an extraordinary talent to prove themselves in any kind of fields that they are well interested   What it takes to be a Mechanical Engineering?What it takes to be a Mech. Engg.?We entered the college with lot of dreams,With the first day, came the first shock: NO GIRLS.With this we started the great journey.First half of first year passed getting acquainted;Getting out of school mentality, exploring the campus;Second half entangled in daughters, t-squares, set square, sheets;Eventually ended  by rewriting the drawing rules.Third was the semester of great transformation;Mastering the art of copying assignments,Getting famous for infamous acts;No matter lost only few marks.Then came the fourth semester,The of tech fests, seminars;We were the hearth of all the events;And were rated best till date.Fire began from fifth semester;Suddenly t...

A dream is being crafted on the dock in Cochin Shipyard. Groups of workers in red and navy blue are shaping a vessel that will make the Indian Navy a truly blue-water force.They are making India’s first Indigenous Aircraft Carrier (IAC).The 22 functional aircraft carriers in the world are owned by nine navies. Only the US, Russia and the UK have built carriers exceeding 40,000 tonnes. India is the fourth country to build a ship in this classWork on the IAC started in November 2006 and 70 per cent of the hull blocks are done. Displacement tests, defining the hull form and structure, space analysis and hydrodynamic modelling have also been completed. The indigenous aircraft carrier project signifies not only an attempt to modernise the Navy, but also a shift in strategy. In the past, India had planned only to counter threats from Pakistan and China. But now it is aiming  at global reach. International maritime laws recognise aircraft carriers as sovereign territories in alm...

Advanced warning for our Antipodean friends in northern Australia not to panic later today when the sky goes dark and the sun seems to disappear: it’s just a total solar eclipse. As it happens, the best view of it will be in the middle of the Pacific Ocean, so anyone bobbing about in a boat east of New Zealand and directly above Antarctica will enjoy the spectacle for the longest time, but lots of people in countries between NZ and South America will get the chance to see at least a partial eclipse. We love an eclipse here at E&T . When the birds fall silent because they think it’s night time: eerie. Click on the graphic for an expanded view. Total solar eclipse 13-14 November 2012

Every time when one look into a blog or any popular website in the sub-continent or even in the Asia-pacific we could see many discussions in the topic “INDIA OR CHINA”.Patriots from both nations will be joining in and posting their thoughts,and I would like to say that my blog is no different and the motivation to this has certainly come from an book called “SUPER POWER” written by Raghav Bahl,an renowned author and journalist,and one of my favourite CNN-IBN host. So books and mags apart what really makes the difference in these two nations.The first and foremost thing coming to mind will be the nature of  governments, Democratic and communist. Many in the west criticized the way communist handle things and their administration techniques, but unlike other communist missions the Chinese had their own growth model and made sure that their development becomes inclusive. What have we done so wrong which the Chinese did so correctly,simple, ...

With a bare-bones sticker price of $1.3 million, Suidobashi Heavy Industry will build you a high-tech, robotic suit that might even make Tony Stark a little nervous. Suidobashi’s Kuratas robot stands 13-feet tall and weighs about 6 tons. It comes standard with a leather seat and a “next-generation” V-Sido robot operating system, which allows the pilot to move the this gigantic bot’s arms and drive it around at a speed of six miles per hour. Weapon systems such a pair of BB-firing mini guns cost extra (Click below to see the super suhweet video). The diesel-powered Kuratas can also be controlled remotely through a 3G network. Read more:  http://defensetech.org/2012/08/06/japanese-iron-man-suit-for-sale/#ixzz2Cw5nZ0ko  

Having already celebrated the Pacific total solar eclipse earlier today, now seems like as good a time as any to punt these two space-related graphics out there for all to enjoy. It’s all about looking up in to the sky and getting big stuff up there,  For your delectation and edification, we present the new generation of super-telescopes (begging the question as to why everything has to be super these days, whether it’s storms or telescopes) and the European Space Agency’s next-generation heavy-lift rockets. They don’t come cheap, you know. Click on the graphics for an expanded view. New generation of super-telescopes

A Puff Of Dust India’s collective memory plays strange tricks. British Raj no longer evokes outrage or indignation in India, within a few decades after the end of colonial rule. The same British Raj, who were overseers of India’s rapid decline from the richest economy to the poorest in a short span of 100 years. Britain’s rapid decline after the loss of India rarely registers on Indian minds. Inspite of a nuclear neighbourhood, defence issues are not electoral hot-buttons in India’s mind-scape. China and Pakistan apart, the three other nuclear powers, (USA, Britain, France) also have military presence in India’s immediate vicinity. In India’s collective memory, its remarkable rise from the Great Bengal Famine of 1941 to overflowing food godowns in 2011 is lost in the media  din and NGO activism . But then, this par for the course, for  a society that keeps re-indexing  even heroes like Raghu Ramachandra and Yadu Krishna. Walk The Talk … 65 years later, afte...