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Prodoggg

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  1. On the drilling and tapping side, solid carbide drills 100 sfm .001 per tooth, 30% peck depth. Tapping; Form tapping works the best for Invar. 15/20 sfm coated forming tap.
  2. What I have done in the past is to leave more material, .100 or so on the floor post finish. If you start machining in the center of the pocket ramping to finished depth. Now start spiraling out with a radial engagement of 25% or less. The added material on the pocket floor will support the thin wall as you machine it. No skim cuts allowed, that would defeat the purpose. I hope this helps.
  3. We still use the shear hog on quite a bit of our alum. jobs, works well.
  4. If you would like to use MMC on both the feature the control frame is referencing and the A datum the correct way to do so is to have a circled 'M' after both the .004 and after the A datum callout. You should have a dia. symbol before the .004 in the feature control frame. This will give you a bonus on the .196 hole of one to one as the feature departs from its maximum material condition (at .197 you would get .002 dia. bonus). The way the additional bonus is gained, in this case, is also one to one as the datum A feature departs from its maximum material condition. The only other thing to consider is that the envelope rule applies so the cylinders are straight within the tolerance zone. So whatever fits in the holes will indeed fit. I hope this helps.
  5. In G93 (inverse time feed) there must be an F (feedrate) command on every line. The control calculates the length of the axis move and the time specified with the F command on every line. The feedrate is only modal in G94 (feed per minute) or G95 (feed per rev) modes. Hope this helps.
  6. You might want to try using a smaller dia. solid carbide end mill, 1/2" or so. Try running it at 100 to 140 surface feet feeding at about .002 per tooth. a small corner radius up to .015" will keep the corner from breaking down too quickly. Don't go with too large of a radius or heat may build up and cause warping and /or work hardening. We have had good luck with this approach.
  7. We machine a lot of Ti. What I do is drill the hole with .0925 dia. drill (2.35 mm)and tap with YMW ZELX Ti LHS/RHC GH2 tap. Use Emuge tapping fluid while tapping. Blow out the hole to be free of coolant first. Drill HSS Co @ 40-50 SFM, Carbide drill @ 100-120 SFM. .0003/.0006 per tooth chip load. Tap @ 12-15 SFM. You can use a dwell in the G84 rigid tapping cycle by adding a P to the canned cycle, this helps cool the tap before retract. (P1000 = 1sec, P2000 = 2sec, ect.) We get hundreds of holes per tap. Hope this helps, If you go with a thread mill do yourself a favor and use a rough and a finish thread mill. Stay away .001/.002 with the rougher and the finisher will last much longer while most the abuse is taken by the rougher. Have Fun!
  8. Our holders measure .0009" under nominal.
  9. The machinability of this grade is similar to that of Titanium 6Al-4V. TICN coated carbide tools work well. Turning inserts, positive rake inserts in negative rake holders work best. Better to increase DOC than to increase feed for maximum removal rate. For milling solid carbide woks well at about 200 SFM, drilling with solid carbide 100 SFM, cobalt at 45 SFM. Don't try and push a worn out tool this material it will work harden. About 75% of our jobs are Ti, have fun.
  10. Look for a button called "CHANGE EDITOR" on mine it is next to BG EDIT button. enter edit mode, on the full prog screen then push (OPTR), then the + key. It is on that screen on mine. Hope that helps.
  11. There should be an edit "type" soft key in the menus somewhere. I had the same thing happen to me on our OKK 5-axis mill with Fanuc 31i A5. after the cycle ends I will try and find it and let you know exactly what it is called.
  12. I would like some suggestions for a deep micro trepanning operation we need to do. It looks like a blind weld prep around a hole that is .101 +/- .001 dia. the small dia. of the prep (O.D.) is .141 +/- .001, the large dia. (I. D.) is .200 +/- .001. Here is the kicker, it goes .145 +/- .005 deep. There is a .010 radius on both corners at the bottom of the prep, and the .200 dia. needs a 32 finish or better. The material is Nickel 200. could anyone help me out with some advise on the best way the machine this and the best tools to use. Thanks
  13. I would like some suggestions for a deep micro trepanning operation we need to do. It looks like a blind weld prep around a hole that is .101 +/- .001 dia. the small dia. of the prep (O.D.) is .141 +/- .001, the large dia. (I. D.) is .200 +/- .001. Here is the kicker, it goes .145 +/- .005 deep. There is a .010 radius on both corners at the bottom of the prep, and the .200 dia. needs a 32 finish or better. The material is Nickel 200. could anyone help me out with some advise on the best way the machine this and the best tools to use. Thanks
  14. We have a VM3 and don't have any problems running at high RPM. The coolant is used to cool the head and flows around the casting before coming out of the nozzle. Make sure you have plenty of coolant flowing around the head and it is not being restricted by a valve. If we don't need all the coolant flow on the part we will direct one or two lines off the table with full flow and one on the part. Also make sure your tool holders are balanced, check for tool run out, should be less than .0003 on small tools. We use shrink fit holders and have good luck. Hope this helps.

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