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| cheaper but suitable alternate material for spring steel |  |  | |
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| Posted by: newton ® 11/03/2009, 10:21:12 Author Profile eMail author Edit |
hi all, i have a specific requirement.i have spring steel strip (like C75,EN 41 etc.)of 100*12*0.6mm with spring back ability(tempered). but the price of this matl.+cost of heat treatment is very high. so, i need to replace this with a suitable but price wise cheaper material(rather than spring steel) with appropriate surface treatments to provide the spring charactor. what about mild steel sheet after heat treatment? please suggest me some material and process... main intents are, should be spring enough.(15 to 20 deg. bending max. should be permissible)
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| : cheaper but suitable alternate material for spring steel -- newton | Post Reply | Top of thread | Engineering Forum |
| Posted by: jboggs ® 11/03/2009, 13:54:17 Author Profile eMail author Edit |
Have you considered urethane springs? They're available in many configurations. Many years ago I even replaced steel leaf springs with custom molded urethane springs (because of a highly corrosive environment) that worked very well. And custom molded urethane springs can be made at surprisingly low cost, even including tooling charges. If you can't find a good source email me and I can give you a referral. |
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| Posted by: newton ® 11/04/2009, 10:44:17 Author Profile eMail author Edit |
actually the application area is at the bottom segment of shoes to provide the spring action.
i have cost limit of 1 cent or 50 paise per component. and also i have one more question that how far it is feasible to use Urethene springs for this application.can you suggest me. what about using Mild steel or high carbon steel sheet after hardening and tempering? will that give spring property to the part? and also 20 degree is also approximate and hope you could have observed the actual requirement by this time which will create more clear idea. thanks |
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| Posted by: zekeman ® 11/03/2009, 15:29:33 Author Profile eMail author Edit |
For 20 degrees of pure bending, I calculated ( and I have been known to make errors) a stress of close to 300,000 psi.If so, I doubt that you got 20 degrees out of the existing spring, and the springs would be failing.I've been through this problem and believe me sometimes there is no easy solution, especially if you want to go on the cheap.
Since the stress varies inversely with the thickness, you could consider reducing the thickness and/or increasing the length which will also reduce the spring force. So,before a change materials is even feasible, why don't you give us the application, including cycling, required retaining force, etc. so that a proper design can be had. |
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| Posted by: zekeman ® 11/03/2009, 17:24:38 Author Profile eMail author Edit |
"Since the stress varies inversely with the thickness...."
Error, should be: Since the stress varies directly with the thickness, |
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