A laser processing system herein includes a laser oscillator, a laser optical path that guides laser beam from the laser oscillator to a workpiece, a purge gas supply line for supplying a purge gas into the laser optical path, oxygen sensor and an impure gas sensor which detects an impure gas influencing the propagation of the laser beam that are installed in the laser optical path, and an impure gas sensor output value correction unit. The impure gas sensor output value correction unit corrects an output value of the impure gas sensor based on an output value of the oxygen sensor.

A laser build-up method according to an embodiment includes the processes of: forming an annular counter sunk groove 15 in an edge of an opening of a port on a side of a combustion chamber; and irradiating a laser beam 30 while a metallic powder 26 is being supplied to the counter sunk groove 15 and successively forming a cladding layer 16 for a valve seat, in which: the cladding layer 16 is formed while a seal gas 24 is being sprayed onto a melt pool 31, the cladding layer 16 includes a starting end part 17a, a part formed just after the starting end part is formed 18a, an intermediate part 18b, a part formed just before a terminating end part is formed 18c, and a terminating end part 17b, which are formed in this order.

Methods and apparatus for laser patterning leverage mask trench debris removal techniques to form etch singulation trenches. In some embodiments, the method includes forming a mask layer on the wafer, forming a pattern in the mask layer using a laser of a laser assembly where the pattern allows singulation of the wafer by deep etching and forms a trench in the mask layer with a laser beam which has a process point at a bottom of the trench, directing gas nozzles that flow a pressurized gas at the process point in the trench as the pattern is formed with a gas flow angle relative to the process point and evacuating debris from the trench using an area of negative pressure where the gas flow from gas nozzles and the area of negative pressure are in fluid contact and are confined within a cylindrical housing.

The invention provides a surface treatment method for a magnesium alloy hub. The process includes: cleaning a to-be-treated surface of the magnesium alloy hub; blackening the cleaned to-be-treated surface; and laser cladding the blackened to-be-treated surface, wherein a laser cladding mode is a synchronous powder feeding mode, and a coating material is chromium. According to the surface treatment method for the magnesium alloy hub, air holes can be avoided.

The present application provides a control method for a laser processing apparatus, and a laser processing system. The laser processing system includes a laser processing apparatus and an air pump. The laser processing apparatus includes an air supply channel connected to the air pump. The air pump is communicatively connected to the laser processing apparatus. The control method for the laser processing apparatus includes: (S10) acquiring processing task information and air pump configuration information of an air pump; (S20) starting a laser processing operation based on the processing task information and synchronously activating the air pump; and (S30) outputting an air pump adjustment instruction to the air pump based on the processing task information and the air pump configuration information, to adjust an air flow rate of the air pump during laser processing.