Can a Warped Heatsink be Straightened for PCB Mounting?

AI Thread Summary
A heatsink is warped by about 2mm in the middle, raising concerns about potential PCB cracking during mounting. The warping is attributed to mass fabrication limitations, such as improper cooling or uneven heating. The user is exploring options to straighten the heatsink but finds machining too costly, especially for the fins. Suggestions for secondary operations to rectify the warpage are sought from experienced engineers. Addressing the warpage is crucial to ensure the longevity and reliability of the PCB mounting.
Seth.T
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Hi,

I need advise on a heatsink warpage(see attached), the heatsink is deflected in the middle about 2mm off, i need to mount pcb on it and might cause cracking over time, I was wondering if any experienced engineers have a good approach to straighten it?



Thanks
Seth
 

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Seth.T said:
Hi,

I need advise on a heatsink warpage(see attached), the heatsink is deflected in the middle about 2mm off, i need to mount pcb on it and might cause cracking over time, I was wondering if any experienced engineers have a good approach to straighten it?



Thanks
Seth

Welcome to the PF. Can you just buy a new one? How did it get warped?
 
Hi Berkeman,
I am buying from OEM , due to certain mass fabrication process limitation(improper cooling or uneven heating from them), a little warping is inevitable. Is there anyway i can add a secondary operation to straighten it out? i thought of machining it to be flat however the fins would be extremely difficult and not worth the cost.
 
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