Mechanical Design Spring selection and Canculation

RonWang5 years ago (2021-09-20)工业技术 INDS32

有一根弹簧实物(材料为304SS),长度是38mm,最大直径是11.7mm,线径是1.7mm,每一圈的距离是5.5mm,要把它的高度垂直挤压到17mm,请计算需要多少牛的力?

F=f*G*d^4/(8*n*D^3)

F:压力,N

f:变形量,mm

G:材料的切变模量,MPa

d:钢丝直径,mm

n:弹簧有效圈数

D:弹簧中径,mm 关于G,一般碳素弹簧钢丝取79000. 304,G=71000.

F=f*G*d^4/(8*n*D^3)

  =(38-17)*71000*1.7^4/(8*38/5.5*10^3)

  =225.3(N)

Spring

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