Spring Comparison

If one were "better" than the other, why would the "worse" type be manufactured?

Spring Type Gallery - Spring Selection Guide

This type of knowledge is acquired by doing research and gaining experience over time.

Expecting someone to infuse you with years of knowledge and experience is not realistic.

i was a trainee in a switchgear manufacturing company in 1967. i realised quickly that springs are the most important and least understood components of switchgear.

Obviously, you are in the same boat, whatever your industry is. So, i, an electrical engineer, a reasonably good spring designer, want to help. If you want to help yourself that is.

If you are in Bangalore, i can talk to you one-on-one and impart whatever little i know.

If you are somewhere else, and are sincere in your quest for knowledge, i am willing to send you some stuff so that you can learn a bit.

Do let me know.

hi,

I work in Mumbai...can you reply me to <email removed>

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Whichever meets the requirements is the best sping. Load and dimension will dictate which spring to choose. If either type spring will work, then cost can be considered.

Just off the top of my head, probably the leaf spring would have more positioning control over the sprung device than a coil spring. The coil would require additional hardware to locate the sprung device.

Sorta-kinda-maybe close?

which is the best ? depends upon its application.

I would sujjest - before coming to this forum , be matured, try to search books, net etc.

i think you are qualified [by education] in your current job. So be student and gather info. then go to expert you will get in depth of subject. Readymade info like fastfood is not good for your future as a engineer.

thank you..but i have done loads of research on it..i just need to compare it,there are question circling which need to be answred,so i thought its better to ask here

There are no stupid questions - rather ask and find out what you were supposed to know than not ask and still remain in the dark.

There are lots of stupid questions - I always considered that a silly statement.

I think you may have got some better answers if you had taken the time to outline exactly what your company is making......then the advice could be "aimed" better....

Well said.

vinayg do you have any additional info you can share?

if a force of 1000N acting on the body and a suspension is to be used for example a motor vehicle,space is not a constrain,now what spring is selected??

Ok, let's say you're designing a 4 wheeled automobile weighing 400kg.

From here on I imagine that you'll need info regarding the use and setup of the vehicle: how much wheel travel is required, how fast must the thing move - how easily will it be to maintain the thing, are there solid axes involved etc?

Let's say you've got all this info and want to properly engineer the answer then you need to figure out things like natural frequency, possible oscillation of sub systems and allot of other things that I know nothing about. Once you've got this info then only can you make an educated decision - maybe a coil spring will oscillate where a leaf will not? - I don't know

If you really don't give a damn about all those and you just need to design a little trolley that some bloke's going to push around in a workshop then use what's available to you and what's cheapest. Don't import a coil if you can buy a leaf at your nearest scrapyard.

But if this is only to settle an argument between a few friends over a beer then (in my opinion):

a) A leaf will give you less travel, will be cheaper to procure (depending where you are), will have a lower load to displacement ratio, will possibly be able to carry heavier loads and requires more horizontal installation space

b) A coil will give you more travel, may be more expensive and will need a more vertical installation space.

Peace out

KPG

GA.

However, i have seen variable-pitch compression springs in automobile suspension, mainly to give a rising force/stroke characteristic i thought, but maybe for damping purpose also.

Vinay, you may want to study the damping part of the pdf i sent to you this morning. Also maybe this link : http://claymore.engineer.gvsu.edu/~peirsonb/misc_egr_files/egr350_report.pdf

Considering that a car it suppose to be as light as possible, you might choose the torsion bar, or its derivate, coil spring (which is a little less effective). The reason is that for the same amount of material (same mass), this tip of springs are capable to store more energy, so for your vehicle, this spring it will be lighter then any other. This will improve your car's acceleration, shorten breaking distance, etc.

GA Andy!

Sometimes a good answer is good advice and that quite simply is it.

Randy

If you are close to a railroad, watch when a train goes by. You will notice the locomotive may have both coil and leaf springs , but the cars will have coil springs. Passenger cars usually used leaf springs and coil springs. The coil springs were to absorb the load and the leaf springs were to provide a comfortable ride. Automobiles follow the same rules.

In europe today few cars, if any at all, use leaf springs anymore.....even the few vans that have a fixed axle still use coils.....