Induction hardening of gear teeth is well known for itschallenges, but also for its potential for improved quality andprocess control. For complex geometric parts like gears, the powerdensity and induction frequency need to be adjusted very preciselyto achieve the required hardening pattern. Since 1940s it is knownthat working with two simultaneous frequencies (1-15 kHz and200-20000 kHz) is the optimal way to heat a geared part tohardening temperature. The key point in this process is that themedium frequency (about 10 kHz) affects primarily the tooth rootand the high frequency affects first of all the tip of the toothand the flanks. The right combination of the power densities ofmedium- and high frequency energy values and the heating time arethe crucial factors to reach a contour true heating pattern and,thereby, a contour true hardening pattern. The authors willdescribe the state of the art of induction hardening of gears withsimultaneous dual frequency using some examples of use and presentthe possibilities to manipulate the hardening pattern in a positiveway for different gear geometries.
- Edition:
- 11
- Published:
- 10/01/2011
- Number of Pages:
- 8
- File Size:
- 1 file , 690 KB
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