Abstract:The expansion tube processing key technology of the T2M internal tooth tube of air conditioner component heat exchanger was analyzed.The T2M tube is expanded by the mechanical expansion tube processing,so that the T2M copper tube is in close contact with the aluminum foil fin,and the heat exchange is performed efficiently.After common inflation,the inner diameter of T2M is increased,and the corresponding cross-sectional area is also increased.When the volume is equal,the length dimension of the tube will compensate the increased area of the cross-section,and the length of the copper tube will shrink.A equipment was researched,in which the copper pipe upper end of the workpiece was locked by using the locking structure,and the lower U-shaped seat was fixed by the pull-down type anti-locking mechanism to ensure that the length of the copper tube of the heat exchanger was not contracted.At the same time,the cup-shaped port of the two-way working position can be simultaneously rotated by 180°.The material amount of T2M copper tubes in the entire heat exchanger reduces by about 5%.