这是米国人搞出来的东东: L1 \. @( _9 |; d
有压簧和拉簧， 1#的是拉压两用弹簧。0 K- ~- F9 w6 R6 l& C* o7 ], U! l
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A. Machined Springs for the isolation of optical benches on the Airborne Laser. B. Machined Springs for the load isolation system on a cargo transportation container used on Space Shuttle/Space Station. C. Conventional Helical Style Springs are also available. AdvantagesLinearity
7 m2 |8 d) [5 e IMachined springs are inherently linear because residual stresses are eliminated and the coils never rest against each other as the spring deflects. Spring rate is the same in both tension and compression. Spring Rate Accuracy We can predict spring rate within +/- 1% before any parts are made using finite element analysis. After making your first part we can then measure its spring rate and remove a calibrated amount of material to achieve the specified rate within measurement error. One Piece Construction Mounting flanges, attachment threads and other fittings can be part of the machined spring. The spring can be an integral part of the machine instead of an add-on. Extremely Long Life Finite element analysis accurately predicts stresses at all points in the spring to provide a design that stays well within fatigue limits. Machined springs can achieve essentially infinite cycle life. Wide Variety of Materials Machined springs can be made from a variety of materials such as high strength steel, stainless steel, aluminum, titanium, and high strength plastics. No Cocking or Twisting The ends of a machined spring are inherently square and the design of the spring automatically eliminates both twisting and cocking. Tension/Compression Operation Unlike coil springs which require a special attachment to operate in tension, machined springs inherently permit both tension and compression operation because their attachments are built in. Freedom from Resonant Vibrations Unlike coil springs which have unavoidable low frequency resonances (surge), machined springs have much higher resonances which are less troublesome. We also have a proprietary treatment that effectively damps out all resonances. Light Weight As spring weight is inversely proportional to the square of the allowable material stress, the ultra-high strength steels available for machined springs can cut 50% or even more from their weight. - B% B4 ^" Y; I/ J
The Only Disadvantage, w9 |$ j6 u9 D1 b6 b+ R
The only disadvantage to a machined spring is cost. You can expect to pay 10 to 100 times as much as you would for a conventional coil spring. So don't expect to use machined springs in most applications. But if you need extraordinarily light weight, or precise alignment, or exact and consistent spring rate, then please consider using a machined spring.. h/ G% Y" Z- c
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楼主: LIAOYAO
发表于 2012-8-25 08:17:02
楼主
