| 摘要 |
PURPOSE:To heat and anneal the entire part of coils uniformly with good thermal efficiency by disposing radiant tubes on the top and side surfaces of the coils, and heating the coil through circulation of radiant heat and high temp. atmosphere gases in a box type annealing furnace for annealing coils. CONSTITUTION:Radiant tubes 4 are disposed to the ceiling of annealing furnace 1, and baffle plates 5 are erected vertically on both sides of the furnace to constitute circulating flow passages 6 for the atmosphere gas in the furnace. Radiant tubes 7 and fans 8 are beforehand provided in these passages 6. The coils A put into the furnace are heated at the top surfaces by the radiation heat of the radiant tubes 4; at the same time, the high temp. atmosphere gas in the furnace flows through the passages 6, is heated by the tubes 7, is flowed through a plenum chamber B by the fans and circulates by passing the insides of the coils from the bottom surfaces of the coils A, and therefore the inside of the coil is heated quickly, and the coils A are heated and annealed uniformly in a short time. |
