PIPE END EXPANDING TOOL

PROBLEM TO BE SOLVED: To provide a pipe end expanding tool capable of preventing leakage of liquid by improving the roundness and the dimensional accuracy of the inside diameter of a connection end of a pipe. SOLUTION: The pipe end expanding tool includes a tool body 1 provided with an insertion hol...

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Bibliographic Details
Main Author TAKADA TAMOTSU
Format Patent
LanguageEnglish
Published 23.10.2008
Subjects
BLASTING
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
JOINTS OR FITTINGS FOR PIPES
LIGHTING
MEANS FOR THERMAL INSULATION IN GENERAL
MECHANICAL ENGINEERING
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PIPES
PUNCHING METAL
SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING
THERMAL INSULATION IN GENERAL
TRANSPORTING
WEAPONS
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Summary:PROBLEM TO BE SOLVED: To provide a pipe end expanding tool capable of preventing leakage of liquid by improving the roundness and the dimensional accuracy of the inside diameter of a connection end of a pipe. SOLUTION: The pipe end expanding tool includes a tool body 1 provided with an insertion hole part 10 having a first stepped part 11 for receiving a fore end face 29 of a pipe 9 on the distal side; and further includes a reciprocating member 2 having a columnar part 20 with the same axis L as that of the insertion hole part 10 and a front end swollen part 22, an elastic short cylindrical member 3 housed over the columnar part 20, and a reciprocating means 4. The tool body 1 has a second stepped part 12 which holds the short cylindrical member 3 together with the front end swollen part 22 and expands it in the outside diameter direction while reducing the dimension in the direction of the axis L. The insertion hole part 10 has a straight portion 15, an inversely tapered portion 14 of a backwardly expanding shape, and a first stepped part 11 backwardly in this order. A fore end 19 is plastically deformed along the inversely tapered part 14 by the swell of the short cylindrical member 3. The pipe 9 is drawn forwardly while the reciprocating member 2 is subjected to the forward operation. The diameter dimension and the roundness are corrected while the fore end 19 is squeezed by the straight portion 15 for correction. COPYRIGHT: (C)2009,JPO&INPIT
Bibliography:Application Number: JP20070100021