Title:
MANUFACTURING METHOD OF COMMON RAIL
Document Type and Number:
Japanese Patent JP2017008812
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a common rail which can suppress a bend of a cylindrical part at autofrettage processing.SOLUTION: A common rail 1 comprises a cylindrical part 3 in which a space 4 used as a pressure accumulation chamber of fuel is formed in a longitudinal direction, and a plurality of connecting parts 7 which are formed along the longitudinal direction of the cylindrical part 3 at a side face of the cylindrical part 3, and connected to the fuel piping of a supply pump and an injector. Lateral holes 8 whose one-side ends communicate with the space 4, and other-side ends are opened at the outside are formed in the connecting parts 7. Ribs 5, 6 are formed at an upper side face at a side at which the connecting parts 7 of the cylindrical part 3 are formed, and at a lower side face at a side opposite to the upper side face side in the longitudinal direction of the cylindrical part 3. A manufacturing method of the common rail 1 manufactures an uncut base to which the ribs 5, 6 are integrally molded by firstly forging a round bar being a raw material. A raw base before autofrettage processing is manufactured by cutting the necessary part of the uncut base. Autofrettage processing is performed on the raw base.SELECTED DRAWING: Figure 1
Inventors:
NISHIWAKI TADASHI
Application Number:
JP2015125257A
Publication Date:
January 12, 2017
Filing Date:
June 23, 2015
Export Citation:
Assignee:
DENSO CORP
International Classes:
F02M55/02; B21D3/14; B23P13/00; B23P25/00
Domestic Patent References:
| JP2010159676A | 2010-07-22 | |||
| JPS63179175A | 1988-07-23 | |||
| JP2000073909A | 2000-03-07 | |||
| JPH09144625A | 1997-06-03 | |||
| JPH0514561U | 1993-02-26 |
Foreign References:
| US20050188956A1 | 2005-09-01 |
Attorney, Agent or Firm:
Ryuji Harikawa