The method of making aluminum tube for spade-tooth PTC heater mainly includes the following steps: Step one is to make a metal aluminum profile by extrusion, the metal aluminum profile is a prismatic structure with a set length, and the metal aluminum profile is provided with a hollow chamber along its length; step two, it will be made The metal aluminum profile is aging treated to control its Webster’s hardness between 6 and 12; step three, the upper and lower surfaces of the aging metal aluminum profile are cut out of the set thickness at a set distance between the upper and lower surfaces The sheet is folded upward at the same time to form a fin-shaped tooth, and finally forms a shovel tooth-type aluminum tube for PTC heater.
