According to the furnace temperature system, it can be divided into a heating period and a preheating period. The furnace is also divided into a heating section and a preheating section accordingly. The small furnace for heating thin materials is also heated on one side. PRECISION CNC SURFACE GRINDING MACHINE Generally, it is heated on both sides. When burning coal, there is a combustion chamber at the end, which is called the head furnace, and the combustion chamber for lower heating is located on both sides, which is called the waist furnace. For heavy oil or gas stoves, burners are installed on the upper and lower end walls, and sometimes burners are also installed on the side walls.FX27-60 HIGH PRECISION TRADITIONAL CYLINDRICAL GRINDER When the thickness of the billet is not large, a two-stage furnace can be used, but when the end face of the billet is thick, the temperature difference between the inside and outside is relatively large after heating.Effect of Magnesium on Aluminum Alloy Vacuum Brazed Joints In order to eliminate the temperature difference, the heating time must be extended, but it is limited by the surface temperature of the material. If the surface temperature is too high, heating defects will occur. At this time, the two-stage continuous heating furnace cannot meet the requirements.The importance of brazing holding time