Title:
METHOD FOR PRODUCING A FLAT SPIRAL SPRING, AND BENDING DEVICE FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2016/020294
Kind Code:
A1
Abstract:
The invention relates to a method for producing a flat spiral spring, in particular a spring sheet for covering a cooling area of a piston of internal combustion engines, said spring sheet being formed at least as an annular disk-shaped segment (12), wherein a strip-shaped material (23) is fed to a bending device (27) that comprises at least one drum (29), said drum rotating about a rotational axis (31), and the strip-shaped material (23) is supplied in a tangential alignment to the lateral surface (36) of the drum (29) such that a lateral wall (20) which determines the thickness of the strip-shaped material (23) rests against at least some sections of a contact surface (37) on the lateral surface (36) of the drum (29). The contact surface (37) of the drum (29) has a radius which substantially corresponds to an internal radius of the strip-shaped material (23) to be bent into the segment (12), and at least one deflecting device (32) is aligned at a distance to the drum (29) such that the strip-shaped material (23) is guided in a forced manner between the drum (29) and the deflecting device (32), and the strip-shaped material (23) is bent so as to follow the drum (29) by means of the deflecting device.
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Inventors:
NAUE KURT (DE)
HAUNHOLTER ANDY (DE)
HAUNHOLTER ANDY (DE)
Application Number:
PCT/EP2015/067712
Publication Date:
February 11, 2016
Filing Date:
July 31, 2015
Export Citation:
Assignee:
SCHNORR ADOLF GMBH CO KG (DE)
International Classes:
B21F3/04; B21D5/14; B21D11/06; B21F3/08; B21F35/04; B21F37/04
Domestic Patent References:
| WO2006018313A1 | 2006-02-23 |
Foreign References:
| JPS5575818A | 1980-06-07 | |||
| DE1752683B1 | 1971-12-30 | |||
| US3729968A | 1973-05-01 | |||
| US3608347A | 1971-09-28 | |||
| US20070183867A1 | 2007-08-09 | |||
| JP2011052777A | 2011-03-17 | |||
| JPH01210127A | 1989-08-23 | |||
| GB1248473A | 1971-10-06 |
Attorney, Agent or Firm:
PATENTANWÄLTE MAMMEL UND MASER (DE)
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