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Patent Searching and Data


Title:
COIL SPRING MANUFACTURING DEVICE AND COIL SPRING MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2018/154953
Kind Code:
A1
Abstract:
This coil spring manufacturing device (30) includes a material supply part (31), a defect detecting device (33), a coiling machine (40), and a control unit (41). When a defect in a continuous material (1C) is detected by the defect detecting device (33), positional information about the defect is stored in a storage means (44) of the control unit (41). The continuous material (1C) is supplied to the coiling machine (40) regardless of the presence of defects, and coil springs are manufactured. The presence of defects in the continuous material (1C) supplied to the coiling machine (40) is determined on the basis of the defect position information stored in the control unit (41). In a sorting part, the shaped coil springs having defects are sorted out from defect-free coil springs. When a portion having a defect in the continuous material (1C) is coiled, shaping is performed such that the coil diameter and the number of turns are different from those of a typical coil spring.

Inventors:
SUGIYAMA MITSUHIRO (JP)
KOYAMA YOSHIMITSU (JP)
FURUSE TAKESHI (JP)
KUMAGAWA YUSUKE (JP)
MORI YUJI (JP)
Application Number:
PCT/JP2017/046239
Publication Date:
August 30, 2018
Filing Date:
December 22, 2017
Export Citation:
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Assignee:
NHK SPRING CO LTD (JP)
International Classes:
B21F35/00; B21F3/04
Foreign References:
JPH081267A1996-01-09
JPH04238621A1992-08-26
JP2005271081A2005-10-06
JP2012117612A2012-06-21
Attorney, Agent or Firm:
S & S INTERNATIONAL PPC (JP)
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