Method of manufacturing the air conditioning for the aluminum alloy inner surface grooved tube and a method for manufacturing and air conditioning for the aluminum inner surface grooved tube air-conditioned and equipped with aluminum alloy inner grooved tube provided with the grooved tube

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy made tube with inner face grooves capable of obtaining sufficient connecting state in spite of a small tube expanding force by which fin collapse hardly happens, and a method for manufacturing the same.;SOLUTION: The aluminum alloy made tube with inner face grooves having convex fins in a longitudinal direction in an inner face characterized in that a surface roughness Ra of the surface of an outside of the tube is in the range of 2 μm to 10 μm is used. Further, the method for manufacturing the aluminum alloy made tube with the inner face grooves having convex fins in a longitudinal direction in the inner face including a step carrying out inner face groove forming machining to the aluminum alloy made tube and a step carrying out surface roughening processing such that the surface roughness Ra of the surface of the outside of the pipe is in the range of 2 μm to 10 μm is used.;COPYRIGHT: (C)2013,JPO&INPIT