Title:
SPRING FORMING DEVICE AND FORMING METHOD
Document Type and Number:
WIPO Patent Application WO/2015/056615
Kind Code:
A1
Abstract:
Provided is a spring forming device that, when cutting a steel wire material, can continuously cut the steel wire material without stopping the feed thereof, and that can uniformly heat the steel wire material. Provided are the following: a wire material supply mechanism (10) for supplying a steel wire material (W) using a plurality of pairs of feed rollers (11); a heating mechanism (20) for heating the steel wire material (W); a coiling mechanism (30) for forming the heated steel wire material (W) into a coil shape; and a cutting mechanism (40) for transecting a portion of the steel wire material (W), which was coiled into a prescribed number of turns, from a rearward portion of the steel wire material (W). A cutting blade (41) of the cutting mechanism (40), when cutting the steel wire material (W), follows a trajectory having a speed Va in the direction of a receiving blade (42) and a speed Vc in the axial direction of the coiled steel wire material (W).
Inventors:
TAKAHASHI KEITA (JP)
SHIRAISHI TOHRU (JP)
ONO YUICHIRO (JP)
NAGASAWA KAORU (JP)
SHIRAISHI TOHRU (JP)
ONO YUICHIRO (JP)
NAGASAWA KAORU (JP)
Application Number:
PCT/JP2014/076914
Publication Date:
April 23, 2015
Filing Date:
October 08, 2014
Export Citation:
Assignee:
NHK SPRING CO LTD (JP)
International Classes:
B21F35/00; B21F11/00; B21F23/00
Foreign References:
| JPS60181235U | 1985-12-02 | |||
| JPH07115101B2 | 1995-12-13 | |||
| US20060196242A1 | 2006-09-07 | |||
| JP2008080386A | 2008-04-10 |
Other References:
See also references of EP 3059025A4
Attorney, Agent or Firm:
SUENARI, Mikio (JP)
End 成 Mikio (JP)
End 成 Mikio (JP)
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