COIL SPRING FORMING METHOD AND FORMING DEVICE

A method for forming a wire into a coil spring includes winding the wire around a coiling mandrel to form the wire into a cylindrical coil shape, clamping one end of the wire formed into the cylindrical coil shape, clamping an intermediate portion of the wire spaced from the clamped one end of the w...

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Bibliographic Details
Main Authors OKURA SHINSUKE, GOTO TAKASHI, YAMASHITA TAKASHI
Format Patent
LanguageEnglish
Published 21.07.2016
Subjects
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PUNCHING METAL
TRANSPORTING
WORKING OR PROCESSING OF METAL WIRE
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Summary:A method for forming a wire into a coil spring includes winding the wire around a coiling mandrel to form the wire into a cylindrical coil shape, clamping one end of the wire formed into the cylindrical coil shape, clamping an intermediate portion of the wire spaced from the clamped one end of the wire; and moving the clamped one end of the wire relative to the clamped intermediate position at least in an axis direction of the cylindrical coil shape, whereby a pigtail having a desired shape is formed.
Bibliography:Application Number: US201415024511