http://www.todaysmachiningworld.com/forum/topic/surface-finish-problem-material-gummy-welding-to-edges-of-tooling Brought to you by Todays Machining World en-US Thu, 09 Feb 2012 03:17:34 +0000 http://bbpress.org/?v=1.0.2 q http://www.todaysmachiningworld.com/forum/search.php http://www.todaysmachiningworld.com/forum/topic/surface-finish-problem-material-gummy-welding-to-edges-of-tooling#post-114 Sun, 15 Feb 2009 23:39:27 +0000 Anonymous 114@http://www.todaysmachiningworld.com/forum/ <p>I would look at your coolant. If material is welding to your cutting tool, you are not removing enough heat. This is either from the lack of sufficient coolant or poor chip evacuation. Be sure the coolant is mixed to the right proportions and you have enough pressure delivering the coolant. </p> http://www.todaysmachiningworld.com/forum/topic/surface-finish-problem-material-gummy-welding-to-edges-of-tooling#post-83 Fri, 13 Feb 2009 13:03:27 +0000 Anonymous 83@http://www.todaysmachiningworld.com/forum/ <p>I use an air grinder to angle the cutting edge so as to direct the chip away from the work. The finished chip curler is usually conical with the large end away from the work.<br /> Careful attention to the cutting edge, as mentioned before, is critical. Use a fine stone to finish all edges, and hone by hand.<br /> Oil coolant is recommended.<br /> Tom </p> http://www.todaysmachiningworld.com/forum/topic/surface-finish-problem-material-gummy-welding-to-edges-of-tooling#post-56 Wed, 11 Feb 2009 19:15:02 +0000 Anonymous 56@http://www.todaysmachiningworld.com/forum/ <p>What material are you running? I'm assuming you've tried various lubricants and cooling fluids? </p> http://www.todaysmachiningworld.com/forum/topic/surface-finish-problem-material-gummy-welding-to-edges-of-tooling#post-51 Wed, 11 Feb 2009 16:40:07 +0000 Anonymous 51@http://www.todaysmachiningworld.com/forum/ <p>We are in a bind. We have a 1500 piece job that has to be delivered by<br /> the end of next week and we have yet to get the job to run to the surface<br /> finish we need. The part is about .750 inches long and formed up to .250 inches deep in<br /> some places. The material is gummy and is welding to the edges of our<br /> tooling. We have tried different rake angles with little luck and are<br /> looking for a quick and economical solution. </p>