METHOD FOR MANUFACTURING AND DEVICE FOR MANUFACTURING ARC SHAPED COIL SPRING

WIPO Patent Application WO/2017/204074

A1

[Problem] The present invention focuses on a servo press that can operate at high speed and high precision by numerical control in a method for manufacturing an arc shaped coil spring and provides a manufacturing method and a manufacturing device that can assure freedom in curvature for an arc shaped coil spring,. [Solution] The manufacturing method comprise a clamping step for affixing a straight cylindrical coil spring, an end part detection step for detecting an end part, a rotational angle positioning step, a pitch feed step, a pressing member striking step, and a striking direction conversion step. The manufacturing method and manufacturing device are a means for forming the coil spring having a curvature from the straight cylindrical coil spring by continuously repeating an operation of pushing the pressing member between pitches from above.

JPH0673708	[Title of Invention] Combination spring manufacturing apparatus
JP3324079	METHOD FOR ERECTING LEG PART OF SECOND SPRING PEG OF COIL SPRING, AND ITS APPARATUS

SUGITA TAKESHI (JP)

PCT/JP2017/018639

November 30, 2017

May 18, 2017

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SYSTEM-TECHNICA CO LTD (JP)

B21F35/02; B21F35/00; F16F1/06

JPH1119743A	1999-01-26
JP2013223883A	2013-10-31
US20110239719A1	2011-10-06
EP1533053A1	2005-05-25

KAMIYOSHIHARA, Hiroshi (JP)

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