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Participant

Join Date: Jul 2008
Location: J-76, MIDC Bhosari, Pune -26
Posts: 1

Controlled Cooling for Cranks Shaft

07/02/2008 5:17 AM

We ned to design controlled cooling conveyor for crank shaft, to achieve micro alloy properties.Crank shaft matl will be 38mn Si Vs 5. After the component is forged, the temparature will be aroung 1050 degree Centigrade. Then sam eis to be passed thru controlled cooling conveyor. To achieve mechanical properties, we need to cool the same by passing the air all around the component, So pl tell me how to carry out the controlled cooling & process details.

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Anonymous Poster
#1

Re: Controlled Cooling for Cranks Shaft

07/02/2008 11:07 AM

Gosh! Probably by installing a modified like a 30' Ft. long low temperature (30*F) cover up display cooler similar to those in the supermarkets provided with circulators fans set-up for supply and return across the evaporator panel and pass them across it to cool it down few degrees as the conveyor being moved at low speed to give time enougth for heat transfering effect and then rinse it out at the end with tap water for 5 minutes before continuing operations. And probably you will like to take advantage of a Mini-Cooling Tower in order to save water in the process. And, at last apply an small film of ligth oil to protect them from corrosion in the meantime. And, storage them up rigth position by some wood made stands to avoid any further gravity stress in case they are long enougth that it will be affected by it during long storage time. And any way it will be wise to home made a wood crattle securing them for shipment purposes as well to protect it further for integrit deliver.

Allset Boss, you have the technology 'crank it up' and good luck with your goals.

Cooled Down,

MC

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Guru

Join Date: Jul 2006
Location: "Dancing over the abyss."
Posts: 4884
Good Answers: 243
#2

Re: Controlled Cooling for Cranks Shaft

07/03/2008 10:21 AM

Actually, you will need to do some engineering.

What is mass of crankshafts? each? per minute? per hour?

When you say "About 1050C," do you mean plus minus 10degrees? 20? 50? 100?

What is cycle time ? takt time / to make each?

The conveying system will have to be capable of withstanding high temperature of forging at time of first drop. and also porous to let air, or air water mist pass through. Lubrication on conveyor will have to withstand the drop temperature radiation and convection from forgings as well. (plus not wash out if indeed you go with air mist) I'm thinking a very open stainless steel link kind of conveyor, but perhaps a hook to let cranks hang and travel through vertical windboxes would be most cost effective.

What is Delta T per minute and or per foot of conveyor travel at air rate that you have available?

What will conveyor speed be?

This will tell you how long the conveyor needs to be.

At what temperature will it be safe to stack these at without reducing the properties developed by the control cooling?

The question that you are asking really does require some thought full engineering, not just an assertion of nonquantitative guesswork.

milo

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Anonymous Poster
#3
In reply to #2

Re: Controlled Cooling for Cranks Shaft

07/03/2008 7:31 PM

Oh Ok that's what I call it 'Industrial Grade Stuff' you catch me one that one again. Deaaamnn... Is alrigth I don't going arguing with you on that one neither, I surrender. You have the technology no doubth about it. Sounds well thougth designing absolutly, that will do it. --Hi Tech Conveyor Mechanism Definetly--

Let me know later how those puppy's came out Buddies. I'm keep telling you will get it here at CR-4 with these guys they mean business, definetly.

Allset have a good one and barbecue time now.. Enjoy it all and easy does it...

Crank that Barbecue Up,

MC

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