Patent Number: 
Section: claims

1. A laser welding apparatus comprising:a welding head including a head body, and a collimate lens opposite to an end face of an optical fiber connected to the head body and installed in the head body; anda welding head scanning apparatus of scanning the welding head;wherein a laser path of introducing a laser emitted from the optical fiber and passing through the collimate lens is formed in the head body;wherein the welding head includes no lenses except the collimate lens;wherein a laser outlet of the laser path is formed in an end portion of the head body;wherein the laser outlet has a size that allows the laser, which is a parallel beam converted by the collimate lens, to pass through the laser outlet;wherein a powder feed path of introducing metallic powder which is a filler metal is formed in the head body, the powder feed path being contained entirely within the head body; andwherein an injection outlet of the powder feed path is formed in the end portion of the head body. 2. The laser welding apparatus according to claim 1, wherein the powder feed path includes a first portion parallel to the laser path and a second portion arranged at an acute angle to the laser path.