Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP13661396Aexternal-prioritypatent/JP2873568B2/en
Application filed by Kyoshin Kogyo KkfiledCriticalKyoshin Kogyo Kk
Publication of MY119417ApublicationCriticalpatent/MY119417A/en
Heat-Exchange Devices With Radiators And Conduit Assemblies
(AREA)
Abstract
A METHOD OF MANUFACTURING A HEAT EXCHANGER WITH A PLURALITY OF RADIATION FINS 6 WHICH ARE STACKED ON A PLURALITY OF HAIRPIN TUBES 7 INCLUDES THE STEPS OF CLAMPING BENT PORTIONS 7A OF THE HAIRPIN TUBES 7 IN SUCH A MANNER AS TO ARREST AXIAL MOVEMENT THEREOF BY A CLAMP 4A HAVING AT LEAST ONE PAIR OF CLAMPING JAWS 4B, PRESS FITTING A PLURALITY OF MANDRELS 2 RESPECTIVELY INTO OPENINGS 7B OF THE HAIRPIN TUBES 7 TO FORM EXPANDED PORTIONS 7D OF A PREDETERMINED LENGTH, MOVING A PLURALITY OF GRIPPERS 3, EACH OF WHICH INCLUDES A PLURALITY OF GRIPPING STRIPS 3A WITH THEIR LONGITUDINAL AXES COAXIALLY ALIGNED WITH THE TUBES, FROM A WITHDRAWAL POSITION TO AN OPERATIVE POSITION IN SUCH A MANNER AS TO GRIP EACH OF THE EXPANDED PORTIONS 7D OF THE TUBES, WHILE MAINTAINING A PREDETERMINED SPACE 3B BETWEEN THE ADJACENT GRIPPING STRIPS 3A, AND MOVING THE MANDRELS 2 WITHIN THE TUBES IN SUCH A MANNER AS TO EXPAND THE TUBES THROUGH THEIR ENTIRE LENGTHS INTO TIGHT, INTERLOCKED RELATIONSHIP WITH THE RADIATION FINS 6. (FIG. 1)
MYPI96035421995-11-071996-08-27Method and apparatus for manufacturing a heat exchanger
MY119417A
(en)