JP2017170477A5 - - Google Patents

Description

In order to solve the above-described problems and achieve the object, the present invention condenses and irradiates a workpiece material with laser light through a machining nozzle and injects a machining gas in the machining head space from the machining nozzle onto the workpiece material. to a processing head of a laser processing apparatus, an axis symmetric shape to the central axis of the processing nozzle, an annular passage which is connected via a connecting channel to the working head space, a process gas into the annular channel And a processing gas supply channel to be supplied. The processing gas supply channel is disposed offset with respect to the central axis of the processing nozzle.

In this embodiment, a CO2 laser, a fiber laser, a disk laser, a YAG (Yttrium Aluminum Garnet) laser, and a direct diode laser can be applied to the laser oscillator 100, but it is not limited to these. Although the propagation optical system 101 shown in FIG. 1 is mirror transmission, a configuration using a curvature mirror or lens in the middle may be used. Furthermore, the fiber laser, in the case of a disk laser, YAG laser or direct diode laser, by forming the propagation optical system 101 by an optical fiber, the After guiding the laser beam 3 to the machining head 1, the processing Generally, a collimating lens may be installed in the head 1 to produce collimated light, and then guided to the processing lens 4. Alternatively, the optical system in the processing head 1 may be a zoom lens using two or more lens groups. The laser beam 3 incident on the processing lens 4 is not necessarily collimated, and can be focused on the processing point with a desired beam diameter by controlling the position of the lens system in conjunction with each other.

Claims (7)

A processing head of a laser processing apparatus for condensing and irradiating a processing material with laser light through a processing nozzle and injecting a processing gas in a processing head inner space from the processing nozzle to the processing material,
The axisymmetrical shape to the central axis of the processing nozzle, an annular passage which is connected via a connecting channel to the working head space,
A processing gas supply channel for supplying the processing gas to the annular channel,
The processing head of the laser processing apparatus, wherein the processing gas supply flow path is arranged offset with respect to a central axis of the processing nozzle.   The processing head of the laser processing apparatus according to claim 1, wherein a cross-sectional area of the connection flow path is larger than a cross-sectional area of the processing gas supply flow path. A plurality of the processing gas supply channels;
3. The processing head of the laser processing apparatus according to claim 1, wherein each of the processing gas supply passages is installed in different directions with respect to the central axis.   The laser processing according to any one of claims 1 to 3, wherein the processing gas supply channel is installed in a direction away from the inlet from the annular channel to the connection channel. The machining head of the device.   5. The processing head of the laser processing apparatus according to claim 1, further comprising a flow path barrier between the downstream outlet of the processing gas supply flow path and the connection flow path.   The processing head of the laser processing apparatus according to claim 1, further comprising a rectifying member that divides the connection flow path in a circumferential direction of the central axis. The processing head of the laser processing apparatus according to claim 6 , wherein a cross-sectional shape of the connection channel divided by the rectifying member is circular.