Single-lamp single-rod double-cavity light path system for laser cutting machine

[0014] Such as figure 1 As described, a single-lamp single-rod dual-cavity laser cutting machine optical path system is provided. The direction indicated by the arrow on the right in the figure is the beam transmission direction. Along the beam transmission direction, a red indicator 11, a total mirror 21, The first gold cavity 30, the second gold cavity 40, the half mirror 51, the water-cooled beam expander 61 and the follower cutting head 70, the red indicator 11 is installed on the four-dimensional mirror frame 12; the total mirror 21 is installed on the water-cooled The two-dimensional mirror frame 22; the half mirror 51 is mounted on the water-cooled two-dimensional mirror frame 52; the water-cooled beam expander 61 is mounted on the four-dimensional mirror frame 62; the right end of the first gold cavity 30 is provided with a first xenon lamp 31, and the left end is provided There is a first yttrium aluminum garnet crystal rod 32; the right end of the second gold cavity 40 is provided with a second xenon lamp 41, and the left end is provided with a second yttrium aluminum garnet crystal rod 42; the follower cutting head 70 includes a head body 71 and a sequential The 45° total mirror 72, the focusing lens 73, the protective mirror 74 and the nozzle 76 are connected to the head 71, and an induction line 75 is also provided on the head 71 near the nozzle 76.

[0015] The first xenon lamp 31 is excited externally to emit light. The emitted light beam enters the first gold cavity 30 after being reflected by the total reflection mirror 21. The light beam is reflected by the inner wall of the first gold cavity 30 to excite the first yttrium aluminum garnet crystal rod 32 to make it Absorbing the 1064nm wavelength beam, the remaining beam enters the second gold cavity 40. Similarly, the second xenon lamp 41 is excited externally to emit light, and the emitted light beam is reflected by the second gold cavity 40 to excite the second yttrium aluminum garnet crystal rod 42. Make it absorb the 1064nm wavelength beam, the remaining light beam of the first gold cavity 30 and the remaining light beam of the second gold cavity 40 are superimposed to obtain a high-quality laser beam, which passes through the second gold cavity 40, and then is reflected by the half mirror 51 , The diameter of the remaining beam is expanded by the water-cooled beam expander 61 and the divergence angle of the beam is reduced, so that the remaining beam becomes a quasi-parallel beam. The quasi-parallel beam enters the follower cutting head 70, and is first reflected by the 45° total mirror 72 Then, the horizontal beam becomes a vertically downward beam. After being focused by the focusing lens 73, a very small high-power density spot is formed at the focal position, and the concentrated very small high-power density spot passes through the protective lens 74 The output from the nozzle 76 is used to process the workpiece under the nozzle 76. As the workpiece is irradiated by the high-power density spot, a local high temperature of over 10000°C is generated, which makes the workpiece vaporize instantly. Relative movement forms a smooth cutting line.

[0016] Whether the above working process is running smoothly can be observed and judged by the red light indicator 11.

[0017] In order to avoid the unevenness of the surface of the processed workpiece, which may cause the uncontrollable phenomenon of the follower cutting head 70 during the cutting process, an induction line 75 is provided on the head body 71 near the nozzle 76.

[0018] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art to which the present invention belongs, without departing from the concept of the present invention Below, a number of simple deductions or substitutions can be made, all of which should be regarded as belonging to the protection scope of the present invention.