INSTALLATION FOR LASER TREATMENT OF PRODUCT INNER SURFACE Russian patent published in 2018 - IPC B23K26/14 B23K26/02 B23K26/08 

FIELD: physics.

SUBSTANCE: optical system of the installation contains a lens, a deflection element, and a protective glass placed in the post and the rod of the mirror, mounted on the output part of the rod in the head. The head consists of a body with light-emitting elements and a composite nozzle. The composite nozzle comprises a body part with light guide holes, the axes of which are directed into the treatment zone, and a bushing with an inner surface coaxially placed therein, forming a nozzle for feeding the flow to the treatment zone. There are gas-distributing holes made in the form of cylindrical channels in the body part and the bushing, the axes of which are directed at an angle toward the protective glass, into the passage zone of light and laser radiation therethrough. The installation also comprises a distribution chamber connected to the gas-distributing holes and the process gas supplying connection. The inner surface of the body part and the outer surface of the bushing of the composite nozzle are made in the form of a cylinder turning into a cone and form a distribution chamber with their cylindrical surfaces and an annular nozzle - with their conical surfaces. The ratio of the cylindrical channel length of each gas-distributing hole of the body part and the bushing to its diameter is chosen to be from 4 to 8. The gas flow cutter, made in the form of a disk with evenly spaced holes, is located in the lower part of the annular chamber.

EFFECT: improving the efficiency of the installation by increasing the efficiency of gas jets acting on the protective glass, and creating the optimal gas flow from the composite nozzle for welding.

2 cl, 3 dwg