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TAKAYAMA SEISAKUSHO KK
Original Assignee
TAKAYAMA SEISAKUSHO KK
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Filing date
Publication date
Application filed by TAKAYAMA SEISAKUSHO KKfiledCriticalTAKAYAMA SEISAKUSHO KK
Priority to JP18447287ApriorityCriticalpatent/JPS6427721A/en
Publication of JPS6427721ApublicationCriticalpatent/JPS6427721A/en
PURPOSE:To reduce working stages and to improve the working efficiency by simultaneously executing by punching a pipe expanding or swaging and flange forming. CONSTITUTION:A pipe 4 is held by the fixed clamp die 3a forming a bead 2 on the inner peripheral face and a mobile clamp die 3b and subjected to punching by moving a punching die 6. In this case the pipe 4 is subjected to swaging by inserting the punching die 6 to an abutting part 9 and pushed in the state as it is to form a flange B. At the time when punching by the punching die 6, the pin 5 fitted in advance inside the punching die 6 is inserted into the pipe 4, hence the part where the pin 5 is inserted does not project to the inner side, but is bulged to the outside and the flange B is formed.
JP18447287A1987-07-231987-07-23Method for working pipe
PendingJPS6427721A
(en)