Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Heat setting of compression springs? 2

Status
Not open for further replies.

jackpot

Materials
Joined
Apr 27, 2004
Messages
25
Location
US
I am looking for information showing the advantages and disadvantages of heat setting compression springs for automotive application. Free length of 1.25" and Diameter of about 0.20" Chrome Silicon.

Jackpot
 
The advantage of heat setting (from SMI Handbook fo Spring Design) is that it removes the usually large first-stage relaxation that occurs when springs are heated above certain limits. It also can establish a favorable residual stress distribution, which will lessen the influence of relaxation. In some cases, the latter approach can be so effective that, in application, compression springs may "grow" or exhibit negative relaxation. Increase in free length does not usually exceed one to two percent.

The disadvantage, is that it is more costly than setting at ambient temperature. However, it can result in a spring that is less costly if Cr-Si alloy steel can be made to work when otherwise a more expensive grade would be required.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top