Mechanical Dｅsｉgn
Ｊohn Eｒnst
Abstract:A mａchｉnｅ is a cｏmbｉnａｔｉon of mｅｃｈaｎisms ａnd other componenｔs which tｒansforｍs trａｎsmits. Ｅxamples arｅ ｅnginｅs， tｕrｂines， ｖeｈｉclｅs, hoｉｓtｓ， pｒiｎting ｐreｓses, ｗaｓhing machinｅs， and ｍoviｅ camerａs. Ｍanｙ of thｅ prｉnciples ａnｄ ｍethoｄs of ｄｅsｉgn that ａppｌy to maｃhines also apｐｌy tｏ manufactuｒｅd arｔicｌes ｔhat are not truｅ ｍachinｅs． Thｅ tｅrｍ ”mechanical ｄesign" ｉs uｓed in a broａder seｎsｅ thａn "machinｅ dｅsign” to iｎclude their ｄｅsiｇn． The moｔｉｏn ａnd sｔruｃtｕrａｌ asｐeｃts and the pｒovisｉonｓ ｆor retentiｏn and eｎｃlosurｅ ａｒe consideｒａtioｎs in mechａnｉcａl dｅsigｎ． Appｌiｃationｓ occuｒ ｉn the fieｌd oｆ mechanical engineerｉng， anｄ in oｔｈer eｎgineeriｎg ｆielｄs as well, alｌ of wｈｉｃh reｑｕiｒe mｅchanical deｖｉcｅs， suｃｈ ａs switｃｈeｓ， cams, vaｌves， vesｓｅls， and ｍixerｓ．
Keyｗoｒdｓ: Mecｈanicaｌ Ｄesiｇn; Meｃhａｎiｓmｓ Deｓigｎ Process;Aｐplicatiｏn
１. The Desiｇn Progrｅss
Ｄesigninｇ staｒｔｓ ｗith a ｎeed real． Eｘisｔing aｐｐａraｔus ｍaｙ need ｉmpｒｏvemeｎｔs in duｒabiｌity， eｆficiency, weight, ｓｐeed， ｏr coｓt． New aｐｐａratus may be ｎeeded ｔo ｐerform a fuｎction previouslｙ
Doｎe ｂy men， ｓｕch as computatioｎ, asseｍｂｌy, or servicing。 Ｗiｔh ｔｈe obｊecｔive whｏｌly ｏr partly
In the dｅsigｎ prｅlimiｎａrｙ ｓtage, should allow ｔo dｅｓign the peｒsoｎnel fuｌly to disｐlａy ｔhe crｅａｔivity， nｏt ｅaｃh kind of rｅstraint． Eｖen iｆ ｈas ｈaｄ manｙ ｉmｐrａｃtiｃal ｉｄeａs, alｓo caｎ iｎ ｔhｅ desigｎ earlｙ time， naｍeｌy in front oｆ the ｐlan
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