Lap welding joint, fuel injection valve and laser welding method
A welding head and laser technology, applied in laser welding equipment, fuel injection equipment, welding equipment, etc., can solve the problem that thick plates cannot obtain penetration depth H100
Active Publication Date: 2016-06-01
HITACHI ASTEMO LTD
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] However, in the heat transfer type laser welding described in Patent Document 1, since the bead width W100 of the weld bead 103 is larger than the penetration depth H100, there is a problem that a sufficient penetration depth H100 cannot be obtained when welding a thick plate.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] Hereinafter, the lap welded joint according to this embodiment will be described with reference to the drawings. In addition, the lap weld joint according to the present embodiment can be applied, for example, to a nozzle of a fuel injection valve (also referred to as an injector) F used in an internal combustion engine of an automobile. figure 1 Indicates the nozzle of the fuel injection valve provided with the lap welded joint according to the present embodiment, figure 1 (a) is a longitudinal section view, figure 1 (b) is a plan view seen from the tip side.
[0025] Such as figure 1 As shown in (a), the fuel injection valve F is formed by joining the nozzle plate (Japanese: ノズルプレート) 1 (the part to be welded) and the nozzle body 2 (the part to be welded) by deep penetration (small hole type) laser welding. become. In addition, in figure 1 In the figure, only the nozzle at the tip portion of the fuel injection valve F is shown, and the needle, piston, solenoi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| wavelength | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides an overlap joint welding head, a fuel injection valve and a laser welding method. The overlap joint welding head can prevent welding crack of a welded member in deep penetration type laser welding. Deep penetration type welding is performed through overlapping of a nozzle plate (1) and a nozzle body (2), irradiation of laser at the side of the nozzle plate (1) and evaporation of the nozzle plate (1) and the nozzle body (2). The shape of the cross section of a welding joint is characterized in that: (i) the angle formed by the a border line (4) forming the border of the nozzle plate (1) and the nozzle body (2) and a tangent line (TL1) of the welding joint (3A) at the point of intersection (P1) between the welding joint (3A) and the border line (4) is greater than 90 DEG, and (ii) the ratio (D1 / L1) of the penetration width (L1) of the welding joint (3A) at the border line (4) to the penetration depth (D1) from the border line (4) to the bottom (3a) of the welding joint (3A) is less than or equal to 1.0.
Description
technical field [0001] The present invention relates to a lap welding joint in which a plurality of parts are lap joined, a fuel injection valve provided with the lap welding joint, and a laser welding method. Background technique [0002] Laser welding is used in various fields because the energy density of the laser light used as a heat source is high, and a welded joint with little deformation, high speed, and high precision can be obtained. In the field of automobiles, steel materials such as stainless steel and carbon steel, and metal materials such as aluminum alloys and nickel alloys are welded by stacking a plurality of workpieces to be welded. [0003] However, if Figure 9 As shown, in the heat transfer type laser welding, in the joint formed by overlapping the welded piece 101 and the welded piece 102, when the laser 104 is irradiated from the surface of the welded piece 101 side, the laser light 104 is welded by the welded pieces 101, 102 Absorption, the laser l...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/24
CPCF02M51/06F02M61/18
Inventor 张旭东小林信章茂木康广矢出典洋
Owner HITACHI ASTEMO LTD