Laser welding method, high-pressure fuel supply pump 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
CN107708913BActive Publication Date: 2019-08-16HITACHI ASTEMO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HITACHI ASTEMO LTD
Publication Date
2019-08-16

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Abstract

An object of the present invention is to provide a laser welding method capable of securing an effective welding length when irradiating a laser beam obliquely. In the laser welding method in which the laser beam (4) is oscillated and scanned periodically while the object to be welded (9) is moved, and the surface of the object to be welded (9) is irradiated for welding, the output and scanning of the laser (4) are controlled. Welding is performed in such a manner that at least one of the speed and the scanning trajectory makes the heat input amounts on the left and right sides of the welding progress direction substantially different.
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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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