Friction-welded structure assembly, water-cooled internal combustion engine cylinder head, water-cooled internal combustion engine and machine equipped with same

• US 10,197,006 B2
• Filed: 12/22/2014
• Issued: 02/05/2019
• Est. Priority Date: 12/23/2013
• Status: Active Grant

• Current Assignee: Shanghai JIAO TONG University, Yaofu Jiang, Yimin Jiang
• Original Assignee: Shanghai JIAO TONG University, Yaofu Jiang, Yimin Jiang
• Inventors: Jiang, Yaofu, Ding, Wenjiang, Peng, Liming, Fu, Penghuai, Zhu, Yongkui
• Primary Examiner(s): Patel, Devang R
• Application Number:
  US15/028,692
• Publication Number:
  US 20160265473A1
• Time in Patent Office: 1,506 Days
• Field of Search: None
• CPC Class Codes: B23K 20/12 the heat being generated by friction; Friction welding
• CPC Class Codes: B23K 20/129 specially adapted for particular articles or workpieces
• CPC Class Codes: B23K 2101/006 Vehicles
• CPC Class Codes: F01L 3/08 Valves guides; Sealing of valve stem, e.g. sealing by lubricant
• CPC Class Codes: F02F 1/242 Arrangement of spark plugs or injectors
• CPC Class Codes: F02F 1/36 for liquid cooling
• CPC Class Codes: F02F 1/4285 of both intake and exhaust channel
• CPC Class Codes: F02F 2001/244 Arrangement of valve stems in cylinder heads
• CPC Class Codes: F02F 2001/249 with flame plate, e.g. insert in the cylinder head used as a thermal insulation between cylinder head and combustion chamber
• CPC Class Codes: F02F 2200/00 Manufacturing
• CPC Class Codes: H05B 6/02 Induction heating

Abstract

The invention provides a friction-welded structure assembly, comprising a first workpiece (10B), a second workpiece (10C) and a friction welding connecting part (10A). The lower side of the friction welding connecting part (10A) has a first friction welding junction interface (10H) which is in contact with a surface of the first workpiece (10B) and a second friction welding junction interface (11H) which is in contact with a surface of the second workpiece (10C). The friction welding connecting part (10A) is tightly pressed on both the first workpiece (10B) and the second workpiece (10C) which are positioned to be relatively corresponding and fixed to each other, while being moved under a pressure, so as to heat said first friction welding junction interface (10H) and said second friction welding junction interface (11H), then said friction welding connecting part (10A) is stopped under the pressure, and said first friction welding junction interface (10H) and said second friction welding junction interface (11H) become cool, thereby said first workpiece (10B) and said second workpiece (10C) are welded together to form the friction-welded structure assembly via said friction welding connecting part (10A). Also, The invention relates to a water-cooled internal combustion engine cylinder head using the friction-welded structure assembly described above.

Claims

1. A friction-welded structure assembly, comprising:

a first workpiece, said first workpiece having a first support shoulder notch and a second support shoulder notch;

a second workpiece, said second workpiece having a through hole corresponding to said first workpiece, and said second workpiece being supported at its lower portion on the first support shoulder notch of said first workpiece; and

a friction welding connecting part having an extended reinforcing portion being supported on the second support shoulder notch of said first workpiece, said friction welding connecting part (10A) having, at its lower portion, a first friction welding junction interface (10H) which is in contact with a surface of said first workpiece (10B), and a second friction welding junction interface (11H) which is in contact with a surface of said second workpiece (10C),

wherein said friction welding connecting part (10A) is tightly pressed on both said first workpiece (10B) and said second workpiece (10C) which are positioned to be relatively corresponding and fixed to each other while being moved under a pressure, so as to heat said first friction welding junction interface (10H) and said second friction welding junction interface (11H), then said friction welding connecting part (10A) is stopped under the pressure, and said first friction welding junction interface (10H) and said second friction welding junction interface (11H) become cool, thereby said first workpiece (10B) and said second workpiece (10C) are welded together to form the friction-welded structure assembly via said friction welding connecting part (10A), and

wherein said friction welding connecting part (10A) has an axially step-like shape so that said first friction welding junction interface (10H) and said second friction welding junction interface (11H) of said friction welding connecting part (10A) are in axially height-different planar surfaces and/or curved surfaces.

2. The friction-welded structure assembly according to claim 1, wherein said first workpiece (10B) has a first workpiece internal hole (11B), and said friction welding connecting part (10A) has a friction welding connecting part internal hole (11A), in the friction-welded structure assembly formed by welding said first workpiece (10B) and said second workpiece (10C) via said friction welding connecting part (10A), said friction welding connecting part internal hole (11A) is aligned with said first workpiece internal hole (11B).

3. The friction-welded structure assembly according to claim 1, wherein said friction welding connecting part (10A) is provided with engaging edges (12A) on an outside wall of one end thereof and/or on an inside wall of one end thereof.

4. The friction-welded structure assembly according to claim 1, wherein said friction welding connecting part (10A) is tightly pressed on both said first workpiece (10B) and said second workpiece (10C) which are positioned to be relatively corresponding and fixed to each other, while being rotated or reciprocated under a pressure.

5. The friction-welded structure assembly according to claim 1, wherein said first workpiece (10B), said second workpiece (10C) and/or said friction welding connecting part (10A) are made of metal materials and/or synthetic materials.

6. The friction-welded structure assembly according to claim 5, wherein said first workpiece (10B), said second workpiece (10C) and/or said friction welding connecting part (10A) are made of aluminum alloys, magnesium alloys and/or titanium alloys.