Question by MattN: Engineering coursework help about milling machines :(?
\nParameters
\nDepth of cut and cutter type for roughing and finishing cuts
\nPosition of workpiece \u2013 datum point
\nSafety cut out
\nGuards<\/p>\n
Information and explanations regarding these?<\/p>\n
Thank you for your help people \ud83d\ude42<\/p>\n
Best answer:
\nAnswer by WingmanI am guessing your are talking about a CNC mill?
\nI have no experience with one, although I wish I did.<\/p>\n
On a manual mill, for a datum point, I use an edge finder and locate the left hand edge of the
\nStationary jaw on the milling vise.<\/p>\n
Once located, I zero out the X axis Digital Read Out \/ DRO.
\nThen I lower table till the edge finder will clear the top of the vise jaws,
\nmove the table to the left 1\/2 of the edge finder diameter.
\nThen zero out the X axis display again.<\/p>\n
This makes the left hand corner on the stationary vise jaw X = 0.000<\/p>\n
I do the same thing for the inside edge of the same vise jaw to make Y = 0.000<\/p>\n
Most work pieces I work with, fit into the vise.<\/p>\n
My DRO map\/ drawings are based on the top left hand corner on the work piece.<\/p>\n
For round work like bolt circles, I work off of the center point of the work piece.<\/p>\n
That work piece is lightly center punched, clamped to the mill table and a pointed
\nedge finder is used to locate the circle center.
\nThe X and Y axis on the DRO are then zeroed out to make the center point of the
\nwork piece X = 0.000 and Y = 0.000<\/p>\n
For depth of cut, a lot depends on the physical size of the mill,
\nthe physical condition of the mill,
\nthe rigidity of the clamping of the work piece,
\navailable mill horse power,
\nsize of the cutter\/ diameter,
\nnumber of flutes on the cutter,
\nwhat I am using for coolant.
\nwhat material the work piece is made of\/ steel, aluminum, exotic<\/p>\n
A good rule of thumb is depth of cut to not to exceed cutter diameter.
\nThis can vary again by all the above mentioned items.<\/p>\n
For the traveling speed of the milling cutter, I do the math and try to keep the chip
\nthickness to 0.010 inches or less.<\/p>\n
Safety cut out, the mills I have worked with are all world war two or earlier and do not
\nhave a safety cut out.<\/p>\n
Guards are usually just clear PVC plastic. I prefer guards made of clear lexan as
\nthey are less prone to breakage than PVC plastic.<\/p>\n
Guards are primarily to keep the coolant and chips from going on the floor.<\/p>\n
For depth of cut, here is a Google search that contains much information.
\nGoogle search for [milling cutters, depth of cut]
\nhttp:\/\/www.google.com\/webhp?sourceid=navclient&ie=UTF-8#hl=en&source=hp&q=milling cutters, depth of cut&btnG=Google Search&rlz=1R2GZAZ_enUS364&aq=f&aqi=&aql=&oq=milling cutters, depth of cut&gs_rfai=&fp=25bac56246434a91<\/p>\n
For milling machine guards
\n[milling machine guards]
\nhttp:\/\/www.google.com\/webhp?sourceid=navclient&ie=UTF-8#hl=en&source=hp&q=milling machine guards&rlz=1R2GZAZ_enUS364&aq=0&aqi=g5g-m3&aql=&oq=milling machine g&gs_rfai=&fp=25bac56246434a91<\/p>\n
[tutorial milling machine workholding]
\nhttp:\/\/www.google.com\/webhp?sourceid=navclient&ie=UTF-8#hl=en&rlz=1R2GZAZ_enUS364&ei=2JG0S_ehE4TINd7HkOwJ&sa=X&oi=spell&resnum=0&ct=result&cd=1&ved=0CA4QBSgA&q=tutorial milling machine workholding&spell=1&fp=25bac56246434a91<\/p>\n
[tutorial CNC mill datum point]
\nhttp:\/\/www.google.com\/webhp?sourceid=navclient&ie=UTF-8#hl=en&source=hp&q=tutorial CNC mill datum point&btnG=Google Search&rlz=1R2GZAZ_enUS364&aq=f&aqi=&aql=&oq=tutorial CNC mill datum point&gs_rfai=&fp=25bac56246434a91<\/p>\n
[tutorial CNC mill workpiece positioning]
\nhttp:\/\/www.google.com\/webhp?sourceid=navclient&ie=UTF-8#hl=en&rlz=1R2GZAZ_enUS364&q=tutorial CNC mill workpiece positioning&aq=f&aqi=&aql=&oq=tutorial CNC mill workpiece positioning&gs_rfai=&fp=25bac56246434a91<\/p>\n
I hope this enough information for you, feel free to email me.
\nThis link will take you to my Profile Page;
\nhttp:\/\/answers.yahoo.com\/my\/profile;_ylt=At4whSUBlf4jc99McgHtxrjsy6IX;_ylv=3?show=arAcdUdgaa&preview=true<\/p>\n
Wingman<\/p>\n
What do you think? Answer below!<\/p>\n","protected":false},"excerpt":{"rendered":"
Question by MattN: Engineering coursework help about milling machines :(? Parameters Depth of cut and cutter type for roughing and finishing cuts Position of workpiece \u2013 datum point Safety cut out Guards Information and explanations regarding these? Thank you for your help people \ud83d\ude42 Best answer: Answer by WingmanI am guessing your are talking about […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[324,453,274,278,132,28],"class_list":["post-478","post","type-post","status-publish","format-standard","hentry","category-machining","tag-about","tag-coursework","tag-engineering","tag-help","tag-machines","tag-milling"],"yoast_head":"\n