Carbide Tipping with Induction Heating

Machine tool manufactures require quality brazing of carbide tips onto their cutting tools. The cutting tips are stronger than the material being cut. A lower cost metal (typically steel) is joined with a small section of a stronger, expensive metal to reduce tooling costs.

Your benefits from induction brazing with Ameritherm equipment:

Higher quality with fewer rejects
Repeatable failure-resistant joints
Faster production with quick heat-up, cool-down cycles
Precise application of heat zone
Easy integration into production lines

Drill bits

image courtesy Bosch Power Tools and Accessories

image courtesy Miles Supply

Drill bits of varying diameters (0.25" to 1.5") require a tungsten carbide cutting tip brazed to a steel drill shaft with a braze flux.  A brazing temperature of approximately 1900°F. is reached with induction heating.  The time required ranges from 11 seconds for a 0.5" diameter bit to 32 seconds for a 1.5" diameter bit.

An Ameritherm 20 kW RF power supply with a set of custom 4-turn helical coils (for the varying sizes) maximizes coupling and heating efficiency.

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Trepan Tools

"We replaced our old tube units with Ameritherm's HOTSHOT 3.5 kW power supply for brazing carbide tips onto steel. Not only are we running our product lines at faster rates, we are also achieving more consistent quality."   Tom Wheeler President Muskegon Tool  image courtesy of: Muskegon Tool Industries