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Laser welding method, pump for supplying high-pressure fuel, and fuel injection valve

A laser welding and laser technology, which is applied in laser welding equipment, welding equipment, transportation and packaging, etc., can solve the problems of effective welding length change, excessive heat input, etc., and achieve longer effective welding length, enlarged welding width, and improved Effect of Target Position Margin

Active Publication Date: 2018-02-16
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such cases, there is the problem of excessive heat input being required to obtain a sufficient effective weld length
In addition, in the case where the target position is shifted due to differences in position settings, etc., there are cases where the effective welding length varies greatly

Method used

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  • Laser welding method, pump for supplying high-pressure fuel, and fuel injection valve
  • Laser welding method, pump for supplying high-pressure fuel, and fuel injection valve
  • Laser welding method, pump for supplying high-pressure fuel, and fuel injection valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] figure 1 It is a schematic diagram of the laser welding apparatus of Example 1.

[0044] exist figure 1 Among them, 1 indicates the laser oscillator, 2 indicates the optical fiber for the laser, 3 indicates the galvanometer scanner, 4 indicates the laser, 5 indicates the rotation direction of the laser, and 6 indicates the rotation direction of the object to be welded (moving direction of the welded part) , 7 denotes a shielding gas nozzle, 8 denotes a shielding gas, 9 denotes an object to be welded, 10 denotes a rotating spindle, 11 denotes a processing table, and 24 denotes a control device.

[0045] In this embodiment, the welding object 9 is a fuel pump component, and the material is 304 stainless steel. In addition, laser light 4 is a disk laser with a wavelength of about 1030 nm. The scanning track of the laser 4 is a circle. Laser 4 tilts 25° for construction. The protective gas 8 is nitrogen.

[0046] Laser light 4 generated by laser oscillator 1 reaches g...

Embodiment 2

[0065] refer to Figure 4 ~ Figure 6B , Embodiment 2 of the present invention will be described. In each figure, the same reference numerals as in the first embodiment are attached to the same constituent elements as in the first embodiment. The description of the same components as those in the first embodiment is omitted.

[0066] Figure 4 It is a schematic diagram of the laser welding apparatus of Example 2.

[0067] In this example, 9 A of objects to be welded are different from Example 1. FIG. Object 9A to be welded is a fuel injection component, and its material is 304 stainless steel. In addition, laser light 4 is a disk laser with a wavelength of about 1030 nm. The scanning track of the laser 4 is a circle. The laser beam 4 is irradiated from the vertical direction of the welding target object 9, and is constructed. The protective gas 8 is the same nitrogen as in the first embodiment.

[0068] The welding object 9A is fixed to the rotating spindle 10 and rotat...

Embodiment 3

[0080] refer to Figure 7 ~ Figure 9B , Embodiment 3 of the present invention will be described. In each figure, the same reference numerals as those in Example 1 and Example 2 are attached to the same constituent elements as in Example 1 and Example 2. FIG. The description of the same constituent elements as those in Embodiment 1 and Embodiment 2 is omitted.

[0081] Figure 7 It is a schematic diagram of the laser welding apparatus of Example 3.

[0082] In this example, welding object 9B is different from Example 1 and Example 2. Since the object to be welded 9B is different from the first and second embodiments, the arrangement of the rotating spindle 10B is different from the first and second embodiments. In Embodiment 1 and Embodiment 2, the rotation axis of the rotation main shaft 10B is arranged in the horizontal direction, but in this embodiment, the rotation axis of the rotation main shaft 10B is arranged in the vertical direction. However, since the direction o...

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Abstract

The purpose of the present invention is to provide a laser welding method with which it is possible to ensure an effective welding length when irradiating a laser beam at an incline. A laser welding method for performing welding by periodically scanning a laser 4 in an oscillating manner and directing the laser 4 on the surface of an object to be welded 9 while the object to be welded 9 is causedto move, wherein at least one of the output, scanning speed, and scanning path of the laser 4 is controlled, and the amount of input heat on both left and right sides along the direction in which welding proceeds is caused to vary substantially, to perform welding.

Description

technical field [0001] The present invention relates to laser welding, in particular to a laser welding method suitable for laser welding of automobile parts. Background technique [0002] Laser welding can achieve deep penetration welding, and it can perform precise and high-speed welding compared with conventional arc welding, so the use of laser welding has increased in recent years. The reason why welding with deep penetration can be realized is that since laser light has a higher power density than arc welding and the like, metal irradiated with laser light melts and evaporates instantaneously. Due to the high reaction force caused by this evaporation, the melting portion is pressed down, forming a space called a keyhole. The laser is able to reach the interior of the material through the keyhole, thus enabling deep penetration welds. Automobile parts have complex structures, and due to the constraints of the production line structure, there are many cases where it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/00B23K26/082B23K26/21
CPCB23K26/26B23K26/28B23K26/082B23K26/242B23K2101/006B23K26/046B23K26/06B23K26/244
Inventor 宫城雅德一户诚之张旭东黑木达郎
Owner HITACHI ASTEMO LTD
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