Gallery, Projects and General > How do I??
Machining a flat face with good surface finish and accuracy
RobWilson:
--- Quote from: picclock on July 10, 2016, 07:54:46 AM ---Hi I really struggled with this so it would be useful to know if there was a better solution out there.
--- End quote ---
There is , get someone else to do all the hard work :med: I use this supplier http://www.groundflatstock.com/Shop/CategoryID/1/ProductID/3 , price is per 500mm ,
Rob
hanermo:
Unusually, disagree with PekkaF.
Abrasives will average local surface errors, thus making stuff more consistent.
Mostly avoiding edges, this will make the object more flat.
Even some modern toolmakers use abrasives to make tools for Haas, in their haas mills, with grinding stones.
Fwiw.
Youtube.
picclock:
Hi, Thanks for your interest and replies.
No shaper, no cast iron plate. As a side issue, what happens when the cast iron plate becomes abraded and no longer flat :scratch:
@PekkaF - The nub of the problem is that you can machine a surface flat overall but the machining marks make it a poor surface. So to get a good surface its necessary to abrade it up to the depth of the machining marks, and in doing so some of the cutting accuracy is lost. Hence my thought that an abrasive wheel on the mill may be an option to get the finish and maintain the accuracy.
@chipenter - Sounds like you have been there and done it. Was it a silicon carbide cone? What sort of speeds did you use? Any chance of a picture ?
@hanermo - Looked up some links on you tube and was quite surprised to see them using grinding stones on a mill. Should have done that before. Seems like its an acceptable solution.
Many Thanks
Best regards
picclock
chipenter:
I will be using my gringing wheel later today , to finish 4 tool holders made from fork lift tines , this is tough stuff and hard to get a finnish on will take some photoes .
RobWilson:
Hi Picclock
How big is the job ? I use a fly cutter on large ish jobs and get canny results .
--- Quote from: chipenter on July 11, 2016, 02:54:45 AM ---I will be using my gringing wheel later today , to finish 4 tool holders made from fork lift tines , this is tough stuff and hard to get a finnish on will take some photoes .
--- End quote ---
Odd Jeff I get a cracking finish on FLT fork material , machines a dream . ( I have access to and have tones of the stuff )
All above are just a few of the things I made from
Rob
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