pls,,,,,,helppp
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Re: pls,,,,,,helppp
Re: pls,,,,,,helppp -- vinnyak	Post Reply	Top of thread	Forum

Posted by: randykimball ® 02/13/2007, 20:51:37 Author Profile eMail author Edit

If you are explaining a vee shaped groove in the face of the part towards the column of the machine, grind one from an old two flute end mill. Simply, grind the shape onto the flutes using a protractor then blue the tool. Then grind relief behind the cutting edges of the flutes leaving some of the blued edges. Blue the tool again and take a test cut on some extra material and make corrections, due to the spiral you will likely need to adjust your grind angle. The blue will help you see which flute had cut with which portions of its cutting edge, it is ok if one flute cuts some areas of the groove better and the other cuts the other areas best, as long as the groove is the shape you are wanting to cut (in fact this is an asset). A couple of correction grind trys should get the job done. If the vee groove is large you may need one tool with a flat bottom and another that completes the bottom of the groove. Just don't be afraid to hand grind a tool, and keep touching it with your fingers, if it is too warm to touch cool it off... this way you will never get the major part of the tool over 130°f (pain happens at 130°f) Please realize that the bottom of a vee groove is very hard to cut. In that location the surface footage of the cutter is very near to zero. You need plenty of RPM and a very slow feed rate. .... however, at the same time as you come up the tool to the upper end of the groove where the tool is wider there tends to be too much surface footage (RPM) and the too will want to burn. So plenty of coolant is vital! Slow feed rates are a must. The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them. Modified by randykimball at Tue, Feb 13, 2007, 21:04:38

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