justfuzzit Posted May 22, 2006 Report Share Posted May 22, 2006 Is forging better than CNC machining? i think it is. because it almost eliminates ovalizing in the headset and bottom bracket areas. CNC machining is just very precise. forging takes an aluminum block and gets smashed into the shape of whatever is being made. the aluminum after being forged is already compacted, making it stronger and less likely to ovalise. it might be slightly heavier. is there an advantage to CNC that i don't know? Quote Link to comment Share on other sites More sharing options...
watto Posted May 22, 2006 Report Share Posted May 22, 2006 Cnc machines are extremely precise and can work to tolerances you could only dream about also it is fairly cost effective and looks good. Also correct me if i am wrong but isn't forgingvery time consuming wheras cnc maching can just be set to go and and all you have to do is put in a new block of material when it has finished its task . Quote Link to comment Share on other sites More sharing options...
Hobnobs Posted May 22, 2006 Report Share Posted May 22, 2006 For trials CNC is the don, stiff as my grandmother, and shes six foot under. Quote Link to comment Share on other sites More sharing options...
justfuzzit Posted May 22, 2006 Author Report Share Posted May 22, 2006 (edited) CNC machining is just very precise. you dont need the precision on bikes. or not to that degree. Personally i would like to have my bike perform well rather than looking "pretty" Edited May 22, 2006 by justfuzzit Quote Link to comment Share on other sites More sharing options...
watto Posted May 22, 2006 Report Share Posted May 22, 2006 Well obviously cnc is working better than forging otherwise why would so many manufacterours be using cnc controlled machines, also it is cost effective therefore keeping our frames prices down. Quote Link to comment Share on other sites More sharing options...
Walleee Posted May 22, 2006 Report Share Posted May 22, 2006 Forging imparts a grain structure within the metal which makes it stronger in certain ways. Depending on the rate of cooling, the product may end up very hard yet brittle, strong yet flexible, or a bit of both. CNC machining just removes material from a billet, can be light, and strong as you can remove material from areas unaffected by stress/strain. Quote Link to comment Share on other sites More sharing options...
Hobnobs Posted May 22, 2006 Report Share Posted May 22, 2006 Well obviously cnc is working better than forging otherwise why would so many manufacterours be using cnc controlled machines, also it is cost effective therefore keeping our frames prices down.How come CNC'ed stuff is more dollah then? Quote Link to comment Share on other sites More sharing options...
dave85 Posted May 22, 2006 Report Share Posted May 22, 2006 Longer process times. Once youve made the dies you can thump forged components out as quickly as you can feed the press. Quote Link to comment Share on other sites More sharing options...
craigjames Posted May 22, 2006 Report Share Posted May 22, 2006 forging is better for strength and resisting forces because you can align the grain of the metal with the direction in which the forces will be applied. its used in the production of cranks, they forge the product to as near a final shape as they can and then machine the excess away. mean less material waste, maximum space and the minimum weight needed. so both together is best Quote Link to comment Share on other sites More sharing options...
Hobnobs Posted May 22, 2006 Report Share Posted May 22, 2006 Oh righty. So tally ho for the combined deng beating cranks. Are middleburns etc forged? Quote Link to comment Share on other sites More sharing options...
Heatsink Posted May 22, 2006 Report Share Posted May 22, 2006 Here is some useful info:Check out the "Manufacturing Overview" link at the bottom - Good info there (aside from the 60s photos!)http://home.howstuffworks.com/question376.htmSteve Quote Link to comment Share on other sites More sharing options...
Will Arnold Posted May 22, 2006 Report Share Posted May 22, 2006 Oh righty. So tally ho for the combined deng beating cranks. Are middleburns etc forged?yer, middleburns are forged. in a place not far from me i believe also, i think forging is best used when it can be justified. for example on a large scale production. whereas CNC machining is used on smaller production thing, such as trials components (small market). designs can be easily changed when CNC machining stuff because yo cann just edit the program. if u want to change something thats being drop forged, then you need to change the whole die.thats what i've been taught anyways.Will Quote Link to comment Share on other sites More sharing options...
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