3 Vertex Drum Lead TimeCurrent ProcessComplete Drum Design – 5 – 10 DaysRough ID and Rough Length (Niigata) - 1 DayRough OD (Lathe) – 1 DaysSemi-Finish OD off Centers (Lathe) – 1 DaySemi-Finish Bore ID & length (Niigata) – 1 DayFinish Hone OD (OSW) – 5 DaysFinish mill length & Chamfers (Nigata) – 2 DaysSemi-Finish OD – center on ID (Lathe) – 1 DayFinish Grind OD –center on ID (OSW) – 4 Days5 Axis machining - mill cavities (SNK) - 4 DaysDebur ID and OD by Hand – 1 DayChrome - 7 DaysAttached Gears- ½ DayTotal: 35 – 45 Working Days (7-9 weeks)Proposed ProcessFinalize Prints – 3 DaysMill cavities (SNK) daysDebur ID and OD by Hand – 1 DayChrome (w/o interior fixturing) DaysAttached Gears - ½ DayTotal: Working Days (2-3 weeks)Need to have “stock thickness” to reduce lead timeSuggested Stock Sizes:Nugget Drum .284McChicken Drum .30010 to 1 Drum4 to 1 Drum
6 Vertex Drum Rework Fixture Inside Diameter Machining- 2 ½ D / Ribble Machining Fixture- Rework / Drum ID ChangeCurrent idea – Walco would build a large holding fixture – and run on their large vertical latheFixtures have NOT been released – Estimated Lead Time 12 weeksRisks include tolerancing and finish. Walco thinks they can hit 63 m finishWalco may also need some sort of surface polishing fixture if 63 m finishdoes not meet requirementsWalco has quoted:$27,100 rework fixtureAt some point we will need to make a decision to kick off2 ½ D fixturing and/or rework fixture
7 RevoPortioner / Drum Cost Calculation RevoFormer500/600/700Competitor tooling costs can be fairly closely estimated
8 RevoPortioner / Drum Mfg Information Mfg - Sintered Drum / Burnished ODFixed OD / No ID requirementsFixed Internal PartsHardware – looks to be able to be reusedCurrent LT – 8 weeksPotential LT – 3-4 wks – don’t know why it can’t be shorter…. If local machinedKeep fixed drums on shelfOnly Programming & Machining w/5 Axis LatheLT may be including made in Europe / may face reduced LT if machined in USCurrent – Sell Price $35K (630 Drum)Cost – Estimated at $18KDrum with roll / burnish? $10-12KCould be rolled or cast in cylinderOD 5 axis Machining – Program & Machine $5kHardware? Estimate $2-3KReworkAdd weightLooks possible - $5K? Don’t see why notReduce weightWith burnished OD – not possible –Key competitive edgeNote – Revo may be working on a “sectional” production drum similar to their test drum.
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