EP 2942122 A1 20151111 - SUB-MUFFLER AND MANUFACTURING METHOD OF SUB-MUFFLER
Title (en)
SUB-MUFFLER AND MANUFACTURING METHOD OF SUB-MUFFLER
Title (de)
NACHSCHALLDÄMPFER UND HERSTELLUNGSVERFAHREN EINES NACHSCHALLDÄMPFERS
Title (fr)
SILENCIEUX ET PROCÉDÉ DE FABRICATION D'UN SILENCIEUX
Publication
Application
Priority
JP 2014096759 A 20140508
Abstract (en)
A manufacturing method of a sub-muffler (1, 201) includes a tubular body shaping step (S3), a central part spinning machining step (S5, S7, S26, S27), and a diameter reduction machining step (S8, S28). In the tubular body shaping step (S3), a cylindrical body (2, 202) is formed by rolling a plate material (70). In the central part spinning machining step (S5, S7, S26, S27), the cross-sectional shape of a central part (20, 220) of the cylindrical body (2, 202) is machined into a rectangular shape by performing a spinning machining in which a rotating roller (88) is moved along a rectangular trajectory (T3, T6) while pressing the rotating roller (88) onto the central part (20, 220) of the cylindrical body (2, 208). In the diameter reduction machining step (S8, S28), the diameter of an end (80, 81, 280, 281) of the cylindrical body (2, 208) is reduced.
IPC 8 full level
B21D 22/14 (2006.01)
CPC (source: EP US)
B21D 5/12 (2013.01 - EP US); F01N 13/18 (2013.01 - US); F01N 13/1872 (2013.01 - EP US); F01N 2470/26 (2013.01 - EP US); Y10T 29/494 (2015.01 - EP US)
Citation (applicant)
JP 2002347664 A 20021204 - NISSAN MOTOR
Citation (search report)
- [Y] EP 1245303 A2 20021002 - SAKAMOTO IND CO LTD [JP]
- [Y] JP 2004243354 A 20040902 - JFE STEEL KK, et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2942122 A1 20151111; CN 105081039 A 20151125; JP 2015213924 A 20151203; US 2015322842 A1 20151112
DOCDB simple family (application)
EP 15166590 A 20150506; CN 201510205823 A 20150427; JP 2014096759 A 20140508; US 201514706169 A 20150507