In down-hole fixed-cutter, rock or hammer drill bit manufacturing and rebuild operations, multiple tool inserts are individually brazed onto a single drill bit. These inserts may be polycrystalline diamond compact (PCD) or tungsten carbide insert (TCI).
Induction heating is a comparatively rapid, efficient method of preheating drill bits to 600 °C (1100 °F) in preparation for torch brazing of the diamond inserts. Let's take a look at the additional benefits of induction preheating:
Safety: no preheating with an open flame or a hot furnace, which is safer and also introduces less unnecessary heat into the work environment.
Better efficiency: instant on, instant off heating so it's only heating when necessary, there's no open flame or large oven heating.
Throughput: induction heating reduces preheat time which of course boosts throughput.
Better quality with braze temperature control.
Repeatability: you can count on a precise, consistent quality braze every time with induction heating as it's not dependent on operator skill.
Easy integration into lean manufacturing processes. Induction workheads can be placed away from the unit itself.
Small footprint: induction systems are modestly sized compared to ovens which frees up valuable factory floor space.