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QXF Shell & Yoke: LARP Experience in LR, HQ, LQ Dan Cheng Sept 17, 2013.

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Presentation on theme: "QXF Shell & Yoke: LARP Experience in LR, HQ, LQ Dan Cheng Sept 17, 2013."— Presentation transcript:

1 QXF Shell & Yoke: LARP Experience in LR, HQ, LQ Dan Cheng Sept 17, 2013

2 Outline Examination of machining and assembly factors that could affect the shell/yoke friction factor behavior differences within LARP magnets – LR – LQ – HQ Sept 17, 2013 D.W. Cheng - LARP Shell & Yoke Experience 2

3 LR Information LR Shell (25O943) – 6061-T6 Aluminum (drawn tube) – Surface finish: called out to be 64 or better Raw material was thick-walled tube that was bored and honed to final diameter (nicer finish than 64, that is) – ID: /-.000 LR Yoke (25O944) – 1018 Steel – Surface finish on OD: 32 OD turned on a lathe before disks were cut in half – OR: /-.003 (equivalent OD: /-.006) Lubricant: – Dow Corning Molykote® Z Moly Powder – 3-4 µm particle size Sept 17, 2013 D.W. Cheng - LARP Shell & Yoke Experience 3

4 LQ Information LQ Shell (27E993) – 6061-T6 Aluminum (forged) – Surface finish: 32 – ID: / segments made from 1 long cylinder, with end-to-end variance in diameter of.002; made from same vendor as LR LQ Yoke (27F188) – 1018 Steel – Surface finish on OD: 32 – OR: /-.002 (Equiv. OD /-.004) Lubricant: – Dow Corning Molykote® Z Moly Powder – 3-4 µm particle size Sept 17, 2013 D.W. Cheng - LARP Shell & Yoke Experience 4

5 HQ Information HQ Shell (27F839) – 7075-T6 Aluminum (Oakland Machine works) – Surface finish: 32 (honed bore) – ID: /-0 HQ Yoke (27F846) – 1018 Steel (Mon-Tek) – Surface finish on OD: 32 – OD: /-.002 (equiv /-.004) Lubricant: – Dow Corning Molykote® Z Moly Powder – 3-4 µm particle size Sept 17, 2013 D.W. Cheng - LARP Shell & Yoke Experience 5

6 Items to Note All shell ID surfaces were honed to at least a 32 finish Yoke OD surfaces called out to 32 finish as well – LR (dipole configuration) yoke diameter was machined.040 undersized, max – LQ & HQ yoke diameters were machined to shell ID, max All assemblies used Dow Corning Molykote Z Powder Sept 17, 2013 D.W. Cheng - LARP Shell & Yoke Experience 6


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