Section 7 - Optimizing Performance
surface speeds between 360 and 600 in./sec. However, speeds of 120 in./sec. and lower have been used with good results. The mathematical relationship between surface speed and spin speed (RPM) is given by the equation:
60v RPM = π D
where
v is the surface velocity
D is the average weld diameter
A plot of the spin speed and average weld diameter for a number of surface speed values is shown in Figure
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| 120 in/sec = 10 ft/sec — | 3 m/sec | ||||||
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| 240 in/sec = 20 ft/sec — | 6 m/sec | ||||||
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| 360 in/sec = 30 ft/sec — | 9 m/sec | ||||||
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| 480 in/sec = 40 ft/sec — 12 m/sec | ||||||||
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| 600 in/sec = 50 ft/sec — 15 m/sec | |||||||||
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| 720 in/sec = 60 ft/sec — 18 m/sec | |||||||||
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| 840 in/sec = 70 ft/sec — 21 m/sec | |||||||
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| 960 in/sec = 80 ft/sec — 24 m/sec | ||||||||
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Speed |
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| v | = |
| v = | 600 | v = | 720 | v | = | 840 | v = | 960 | in/sec | |
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| v = | 480 |
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Spin |
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| 120 |
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RPM | 0 |
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D Average Weld Diameter (inch)
Figure 7–1 Dependence of Spin Speed on the Weld Diameter for Selected Surface Speeds
Dukane Manual Part No. | Page 61 |