JP2007007698A - Laser beam machining head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laser beam machining head designed to be able to monitor, for example, condition of a part to be machined without making the machining head larger. <P>SOLUTION: In performing laser welding by bisecting with reflection mirrors 113, 114 a laser beam L10 which is made a parallel laser beam L11 and by converging with a condensing lens group 115 these divided laser beams L12a, L12b on a part W to be machined, the optical image of the weld zone caught by the condensing lens group 115 is formed on an image sensor 131. With a groove irradiated by a slit beam from a guide light source 132, an image of the slit beam traversing the groove can be recognized in an image processor 140, also a position of the groove can be recognized. In addition, if a sensor capable of receiving a light beam of plasma or of weld metal is arranged instead of the image sensor, a condition of the light emission can also be recognized. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a laser processing head. The laser processing head targeted by the present invention performs laser processing (for example, laser welding) by dividing the laser beam into two parts and then condensing the laser beam on the processing part, and processing means disposed between the divided laser beams This is a type of laser processing head that simultaneously performs processing (for example, arc welding) by the tip processing portion.
In the present invention, such a type of laser processing head is devised so that the state of the part to be processed can be monitored without increasing the size.

  Laser welding and arc welding are one type of welding technology for joining metals together. In laser welding, a laser beam is focused by an optical device to obtain a high energy density, so that deep penetration welding can be performed in a narrow melting range. On the other hand, in arc welding, since the arc spreads over a relatively wide range, welding with a wide bead width is possible, and welding with a high groove tolerance is possible.

  For this reason, in recent years, laser processing heads capable of performing laser welding and arc welding simultaneously have been developed for the purpose of performing welding with a wide welding range and deep penetration.

  Here, an outline of the laser processing head developed and filed by the inventor of the present application and published (Japanese Patent Laid-Open No. 2002-59286) will be described with reference to FIG.

  In the laser processing head 10 shown in FIG. 3, an arc held by a collimating lens group 12, a first reflecting mirror 13, a second reflecting mirror 14, a condenser lens group 15, and an electrode head 16 in an outer cylinder 11. An electrode 17 is provided.

  Laser light L0 output from a YAG laser oscillator (not shown) and transmitted by the optical fiber 20 is irradiated toward the collimating lens group 12 of the laser processing head 10. The laser light L0 is converted into parallel parallel laser light L1 by passing through a collimating lens group 12 formed by arranging a plurality of lenses in series.

  A part of the parallel laser beam L1 is reflected by the first reflecting mirror 13 in a direction orthogonal to the optical axis of the parallel laser beam L0. In this way, the parallel laser beam L1 is divided into the remaining divided laser beam L2a that has not been reflected by the first reflecting mirror 13 and the divided laser beam L2b that has been reflected by the first reflecting mirror 13.

The divided laser beam L2b is reflected by the second reflecting mirror 14 in a direction parallel to the optical axes of the parallel laser beam L1 and the divided laser beam L2a.
In this way, the divided laser beam L2a and the divided laser beam L2b are parallel, and a space (gap) is formed between them.

  The divided laser beams L <b> 2 a and L <b> 2 b are condensed by a condenser lens group 15 configured by arranging a plurality of lenses in series, and are condensed and irradiated toward a welded portion of the base material W. Thereby, laser welding is performed by the condensed divided laser beams L2a and L2b.

  The arc electrode 17 supported by the outer cylinder 11 by the electrode head 16 is closer to the workpiece W than the condensing lens 15 and is a space (gap between the divided laser light L2a and the divided laser light L2b that is condensed. ). Arc welding is performed by the arc electrode 17.

  Thus, by using this laser processing head 10, laser welding and arc welding can be performed simultaneously.

JP 2002-59286 A

There is a desire to observe the welding state at the time of welding in the machining head 10 that can perform laser welding and arc welding at the same time, or can perform only one welding.
In order to realize this demand, an image pickup means that can take an image of a portion welded by the laser processing head 10 is attached to the side of the laser processing head 10, and the image pickup means is synchronized with the movement of the laser processing head 10. Just move.
However, if such an imaging means is attached separately from the laser processing head 10, the apparatus configuration becomes large. Further, when the image pickup means is disposed beside the laser processing head 10, the image pickup means may interfere (collision) with surrounding members during welding, resulting in a decrease in welding accuracy and welding efficiency. May end up.

  In view of the above prior art, the present invention is a laser processing head that simultaneously performs laser processing such as laser welding and processing such as arc welding, and is capable of monitoring the state of the processing portion without increasing the size of the apparatus configuration. The object is to provide a head.

The configuration of the present invention for solving the above problems is as follows.
A collimating optical system that collimates input laser light and outputs it as parallel laser light;
A splitting optical system that splits the parallel laser light output from the collimating optical system into two parts and separately transmits the two split laser lights along two split optical paths that are parallel and spatially separated from each other;
A condensing optical system for condensing the split laser beam divided into two parts transmitted from the splitting optical system onto a workpiece;
A tip processing portion of a processing means that occupies a position between the divided laser beams divided into two at a position closer to the processing portion than the condensing optical system;
An adjusting optical system that condenses the light emitted from the processed part side and captured by the condensing optical system and propagated through one of the two divided optical paths;
And a sensor arranged at a position where the light is condensed by the adjustment optical system.

The configuration of the present invention is as follows.
A collimating optical system that collimates input laser light and outputs it as parallel laser light;
A first reflecting mirror that divides the parallel laser beam output from the collimating optical system into two parts, a first split laser beam that has not been reflected and a second split laser beam that has been reflected by reflecting a part of the parallel laser beam output from the collimating optical system When,
While the second divided laser beam reflected by the first reflecting mirror is further reflected and travels in a direction parallel to the first divided laser beam and spatially separated from the first divided laser beam, A second reflecting mirror that transmits light having a wavelength different from the wavelength of the laser light (visible light, ultraviolet light, or part of infrared light);
A condensing optical system for condensing the first divided laser beam and the second divided laser beam reflected by the second reflecting mirror on the workpiece;
A tip processing portion of a processing means that occupies a position between the first and second divided laser beams at a position closer to the processing portion than the condensing optical system;
Light (visible light, ultraviolet light, or part of infrared light) emitted from the processed part side, captured by the condensing optical system, and transmitted through the second reflecting mirror is collected. An adjusting optical system that emits light;
And a sensor arranged at a position where the light (visible light, ultraviolet light, or part of infrared light) is collected by the adjusting optical system.

The configuration of the present invention is as follows.
A collimating optical system that collimates input laser light and outputs it as parallel laser light;
A beam splitter that reflects parallel laser light output from the collimating optical system and divides the parallel laser light into a first split laser light and a second split laser light;
A first reflecting mirror that further reflects the first split laser beam and travels in a direction parallel to the parallel laser beam;
The second divided laser beam is further reflected and travels in a direction parallel to the parallel laser beam and spatially separated from the first divided laser beam, while having a wavelength different from the wavelength of the laser beam ( A second reflecting mirror that transmits visible light, ultraviolet light, or part of infrared light);
A condensing optical system for condensing the first divided laser beam reflected by the first reflecting mirror and the second divided laser beam reflected by the second reflecting mirror on the workpiece;
A tip processing portion of a processing means that occupies a position between the first and second divided laser beams at a position closer to the processing portion than the condensing optical system;
Light (visible light, ultraviolet light, or part of infrared light) emitted from the processed part side, captured by the condensing optical system, and transmitted through the second reflecting mirror is collected. An adjusting optical system that emits light;
And a sensor arranged at a position where the light (visible light, ultraviolet light, or part of infrared light) is collected by the adjusting optical system.

The configuration of the present invention is as follows.
A guide light source that emits guide light that is visible light toward the workpiece,
A guide light source for obliquely irradiating guide light, which is slit-like visible light, toward the workpiece is provided.

The configuration of the present invention is as follows.
The sensor is an image sensor,
The sensor is a temperature sensor that determines a temperature from the color of light.

The configuration of the present invention is as follows.
A tip processing portion of the processing means is a GMA electrode, a TIG electrode, a filler wire, or a brazing material.

According to the present invention, laser processing (for example, laser welding) is performed by dividing the laser beam into two and then condensing the laser beam on the processing portion, and by the tip processing portion of the processing means disposed between the divided laser beams. In a laser processing head of the type that performs processing (for example, arc welding) at the same time, the state of the processing part can be monitored without increasing the size of the processing head.
For this reason, the state of a to-be-processed part, a welding state, position control, etc. can be performed easily.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

  FIG. 1 shows a laser processing apparatus 100 including a laser processing head 110 according to Embodiment 1 of the present invention.

  In the laser processing head 110 according to the first embodiment, an arc held by the collimating lens group 112, the first reflecting mirror 113, the second reflecting mirror 114, the condenser lens group 115, and the head 116 in the outer cylinder 111. An electrode 117, an adjustment optical system 130, an image sensor 131, and a guide light source 132 are provided.

The collimating lens group 112 is configured by arranging a plurality of lenses in series.
The first reflecting mirror 113 and the second reflecting mirror 114 constitute a split optical system. The first reflection mirror 113 is a flat mirror that reflects laser light (infrared light: wavelength is 1064 nm, for example). The second reflecting mirror 114 reflects laser light (infrared light: wavelength is 1064 nm, for example), but light having a wavelength other than the wavelength of the laser light, that is, visible light (wavelength is 360 nm to 830 nm, for example) and ultraviolet light. This is a flat mirror that transmits a part of infrared light. Specifically, the second reflection mirror 114 is configured by applying a transparent infrared-based reflection coat to quartz, and functions as a total reflection mirror for laser light, and for visible light. It functions as a transparent plate.

The condenser lens group 115 is configured by arranging a plurality of lenses in series.
The head 116 is located below the condensing lens group 115, that is, on the base material (processed part) W side, and is located at a position between two divided laser beams L12a and L12b described later. Is arranged. As the arc electrode 117, a GMA (gas metal arc welding) electrode or a TIG (tungusten inert gas welding) electrode can be used.

The adjusting optical system 130 is configured by arranging a plurality of lenses in series.
The image sensor 131 is configured by a CCD (Charge Coupled Device).
The guide light source 132 irradiates guide light, which is visible light, obliquely toward the base material W. The guide light source 132 may not be used depending on an inspection item described later.
The guide light source 132 may irradiate guide light for simply increasing illuminance or irradiate slit light.

  The laser beam L10 output from the YAG laser oscillator 121 and transmitted through the optical fiber 120 is irradiated toward the collimating lens group 112 of the laser processing head 110. The laser light L10 input to the collimating lens group 112 passes through the collimating lens group 112 and is output as parallel parallel laser light L11.

  A part of the parallel laser beam L11 is reflected by the first reflecting mirror 113 in a direction orthogonal to the optical axis of the parallel laser beam L10. In this way, the parallel laser beam L10 is divided into the first divided laser beam L12a that has not been reflected by the first reflecting mirror 113 and the second divided laser beam L12b that has been reflected by the first reflecting mirror 113.

The divided laser light L12b is further reflected by the second reflecting mirror 114, and travels in a direction parallel to the optical axes of the parallel laser light L11 and the divided laser light L12a.
In this way, the divided laser beam L12a and the divided laser beam L12b are parallel, and a space (gap) is formed between them.

  The divided laser beams L12a and L12b are condensed by the condensing lens group 115 and condensed and irradiated toward the welded portion of the base material W. Thereby, laser welding is performed by the condensed divided laser beams L12a and L12b.

  The arc electrode 117 supported by the outer cylinder 111 by the head 116 is closer to the workpiece W than the condensing lens 115, and is a space (gap) between the divided laser light L12a and the divided laser light L12b that are collected. Is arranged. Arc welding is performed by the arc electrode 117.

Thus, by using this laser processing head 110, laser welding and arc welding can be performed simultaneously.
Instead of the arc electrode 117, filler wire or brazing material may be supplied from the cylindrical head 116 to perform filler welding or brazing.

Light (optical image) emitted from the processed portion of the base material W is captured by the condenser lens 115, passes through the reflection mirror 114, and propagates to the adjustment optical system 130. This light (optical image) is condensed (imaged) on the image sensor 131 by the adjustment optical system 130. For this reason, the image sensor 131 photoelectrically converts the image of the part to be processed of the base material W and outputs it as an image signal S.
The optical path from the condenser lens system 115 to the second reflecting mirror 114 is referred to as “one split optical path” in claim 1.

  The image processing apparatus 140 performs signal processing on the image signal S, and displays a processed portion of the base material W (that is, an image captured by the condenser lens 115) on the monitor 141.

At this time, by visually recognizing the image displayed on the monitor 141, the operator can observe the state of the part to be processed before, for example, welding.
Further, after the welding is completed, if the laser processing head 110 is moved along the welding-completed part (welding line where the welding is completed), the state of the welding-completed part (building up state) is displayed on the monitor 141. It can also be confirmed visually.

  Further, based on the result of image processing by the image processing device 140, the control device 142 recognizes the positional relationship between the laser processing head 110 and the base material W and performs laser processing so as to perform alignment before starting welding. The position of the head 110 can also be controlled.

  When the part to be processed is dark, the guide light source 132 may be irradiated with illumination guide light (visible light) to increase the illuminance.

  In addition, when slit light (visible light) is applied from the guide light source 132 in a state where it crosses a welding groove that is a part to be processed of the base material W, an image in a state where the slit light crosses the welding groove becomes a condensing lens 115. The image is formed on the image sensor 131 via the second reflecting mirror 114 and the adjusting optical system 130. For this reason, an image signal S indicating an image in which the slit light crosses the welding groove is sent to the image processing device 140.

At this time, the image processing device 140 can detect the position of the welding groove by applying the principle of triangulation by performing image processing on the image in which the slit light crosses the welding groove. Since this position detection method is a well-known technique, detailed description thereof is omitted.
When the laser processing head 110 is moved along the welding groove (welding line), the image processing apparatus 140 can recognize the position of the welding line by continuously performing such processing. Based on the weld line position recognized by the image processing apparatus 140, the control apparatus 142 can perform scanning control so that the laser processing head 110 moves along the weld line position.

  Further, the image processing apparatus 140 can determine the temperature state of the molten pool and the temperature state of plasma emission during welding, for example, by processing and detecting the color and color distribution of the image.

Furthermore, instead of the image sensor 131, a temperature sensor that determines the temperature from the color of light can be attached, and the temperature state of the base material W can be determined and detected based on the detection result of the temperature sensor.
Furthermore, instead of the image sensor 131, a welding state can be determined by attaching an intensity sensor that detects ultraviolet light or the like emitted from plasma. Further, it is possible to determine the welding process state by attaching a sensor for detecting the reflected light of the laser used for processing.

  In the laser processing head 110 according to the first embodiment, the laser light is once divided into two so as to be able to perform laser welding and arc welding at the same time. In the laser processing head 110 according to the first embodiment having such a configuration, the upper position of the second reflecting mirror 114 has a margin in terms of optical and space. Therefore, the adjustment optical system 130 and the image sensor 131 are installed at this position. Arranged. For this reason, it is possible to perform monitoring such as image recognition of the welded portion without causing an increase in the size of the laser processing head 110.

  FIG. 2 shows a laser processing apparatus 200 including a laser processing head 210 according to the second embodiment of the present invention.

  In the laser processing head 210 according to the second embodiment, a collimating lens group 212, a beam splitter 218, a first reflecting mirror 213, a second reflecting mirror 214, a condensing lens group 215, and a head are provided in an outer cylinder 211. An arc electrode 217 held at 216, an adjustment optical system 230, an image sensor 231, and a guide light source 232 are provided.

The collimating lens group 212 is configured by arranging a plurality of lenses in series.
The beam splitter 218 is an optical element that functions to divide laser light into two.
The first reflecting mirror 213 and the second reflecting mirror 214 constitute a split optical system. The first reflecting mirror 213 is a flat mirror that reflects laser light (infrared light: wavelength is 1064 nm, for example). The second reflecting mirror 214 reflects laser light (infrared light: wavelength is 1064 nm, for example), but light having a wavelength other than the wavelength of the laser light, that is, visible light (wavelength is 360 nm to 830 nm, for example) and ultraviolet light. This is a flat mirror that transmits a part of infrared light. Specifically, the second reflection mirror 214 is configured by applying a transparent infrared-based reflection coating to quartz, and functions as a total reflection mirror for laser light, and for visible light. It functions as a transparent plate.

The condensing lens group 215 is configured by arranging a plurality of lenses in series.
The head 216 is positioned below the condensing lens group 215, that is, on the base material (processed part) W side, and is located at a position between two divided laser beams L22a and L22b described later. Is arranged. As the arc electrode 217, a GMA (gas metal arc welding) electrode or a TIG (tungusten inert gas welding) electrode can be used.

The adjusting optical system 230 is configured by arranging a plurality of lenses in series.
The image sensor 231 is configured by a CCD (Charge Coupled Device).
The guide light source 232 irradiates guide light, which is visible light, obliquely toward the base material W. The guide light source 232 may not be used depending on an inspection item described later.
The guide light source 232 may irradiate guide light for simply increasing illuminance or irradiate slit light.

  The laser beam L20 output from the YAG laser oscillator 221 and transmitted through the optical fiber 220 is irradiated toward the collimating lens group 212 of the laser processing head 210. The laser beam L20 input to the collimating lens group 212 passes through the collimating lens group 212 and is output as a parallel parallel laser beam L21.

  The parallel laser beam L21 is converted into a first divided laser beam L22a and a first divided laser beam L22b by the beam splitter 218 in the directions orthogonal to the optical axis of the parallel laser beam L21 and the traveling directions are opposite to each other. Divided into two.

The divided laser beam L22a that has traveled toward the first reflecting mirror 213 is further reflected by the first reflecting mirror 213 and travels in a direction parallel to the optical axis of the parallel laser beam L21.
The divided laser beam L22b that has traveled toward the second reflecting mirror 214 is further reflected by the second reflecting mirror 214 and travels in a direction parallel to the optical axis of the parallel laser beam L21.
In this way, the divided laser beam L22a and the divided laser beam L22b are parallel, and a space (gap) is formed between them.

  The divided laser beams L22a and L22b are condensed by the condenser lens group 215, and are condensed and irradiated toward the welded portion of the base material W. Thereby, laser welding is performed by the condensed divided laser beams L22a and L22b.

  The arc electrode 217 supported by the outer cylinder 211 by the head 216 is closer to the workpiece W than the condensing lens 215 and is a space (gap) between the divided laser light L22a and the divided laser light L22b that are being condensed. Is arranged. Arc welding is performed by the arc electrode 217.

Thus, by using this laser processing head 210, laser welding and arc welding can be performed simultaneously.
Instead of the arc electrode 217, filler wire or brazing material may be supplied from the cylindrical head 216 to perform filler welding or brazing.

Light (optical image) emitted from the processed portion of the base material W is captured by the condenser lens 215, passes through the reflection mirror 214, and propagates to the adjustment optical system 230. This light (optical image) is condensed (imaged) on the image sensor 231 by the adjusting optical system 230. For this reason, the image sensor 231 photoelectrically converts the image of the part to be processed of the base material W and outputs it as an image signal S.
The optical path from the condenser lens system 215 to the second reflection mirror 214 is referred to as “one split optical path” in claim 1.

  The image processing device 240 performs signal processing on the image signal S, and displays a processed portion of the base material W (that is, an image captured by the condenser lens 215) on the monitor 241.

At this time, by visually recognizing the image displayed on the monitor 241, the operator can observe the state of the part to be processed before, for example, welding.
If the laser processing head 210 is moved along the welded part (welded line where welding is completed) after welding is completed, the state of the welded part (filled state) is displayed on the monitor 241. It can also be confirmed visually.

  Further, based on the result of image processing by the image processing device 240, the control device 242 recognizes the positional relationship between the laser processing head 210 and the base material W, and performs laser processing so as to perform alignment before starting welding. The position of the head 210 can also be controlled.

  When the part to be processed is dark, the guide light source (visible light) may be irradiated toward the base material W in order to increase the illuminance from the guide light source 232.

  In addition, when slit light (visible light) is applied from the guide light source 232 in a state where it crosses a welding groove that is a portion to be processed of the base material W, an image in a state where the slit light crosses the welding groove is a condensing lens 215. The image is formed on the image sensor 231 through the second reflecting mirror 214 and the adjusting optical system 230. For this reason, an image signal S indicating an image in which the slit light crosses the welding groove is sent to the image processing device 240.

At this time, the image processing device 240 can detect the position of the welding groove by applying the principle of triangulation by performing image processing on an image in a state where the slit light crosses the welding groove. Since this position detection method is a well-known technique, detailed description thereof is omitted.
When the laser processing head 210 is moved along the welding groove (welding line), the image processing apparatus 240 can recognize the position of the welding line by continuously performing such processing. Based on the weld line position recognized by the image processing device 240, the control device 242 can perform scanning control so that the laser processing head 210 moves along the weld line position.

  Further, the image processing apparatus 240 can determine the temperature state of the molten pool, the temperature state of plasma emission, and the like during welding, for example, by processing and detecting the color and color distribution of the image.

Furthermore, instead of the image sensor 231, a temperature sensor that determines the temperature from the color of light can be attached, and the temperature state of the base material W can be determined and detected based on the detection result of the temperature sensor.
Furthermore, instead of the image sensor 231, it is possible to determine the welding state by attaching an intensity sensor that detects ultraviolet light emitted from plasma. Further, it is possible to determine the welding process state by attaching a sensor for detecting the reflected light of the laser used for processing.

  In the laser processing head 210 according to the second embodiment, the laser beam is focused after being divided into two parts so that laser welding and arc welding can be performed simultaneously. In the laser processing head 210 according to the second embodiment having such a configuration, the upper position of the second reflecting mirror 214 has an optical and spatial margin, and therefore the adjustment optical system 230 and the image sensor 231 are installed at this position. Arranged. For this reason, it is possible to perform monitoring such as image recognition of the welded portion without causing an increase in the size of the laser processing head 210.

1 is a configuration diagram showing a laser processing head according to Embodiment 1 of the present invention. FIG. The block diagram which shows the laser processing head which concerns on Example 2 of this invention. The block diagram which shows the conventional laser processing head.

Explanation of symbols

100,200 Laser processing equipment
110,210 Laser processing head
111,211 outer cylinder
112,212 collimating lens group
113,213 First reflection mirror
114,214 Second reflection mirror
115,215 Condensing lens group
116,216 heads
117,217 arc electrodes
218 Beam splitter
120,220 optical fiber
121,221 YAG laser oscillator
130,230 Adjustment optics
131,231 Image sensor
132,232 Guide light source
140,240 Image processing device
141,241 monitors
142,242 Control unit

Claims (8)

A collimating optical system that collimates input laser light and outputs it as parallel laser light;
A splitting optical system that splits the parallel laser light output from the collimating optical system into two parts and separately transmits the two split laser lights along two split optical paths that are parallel and spatially separated from each other;
A condensing optical system for condensing the split laser beam divided into two parts transmitted from the splitting optical system onto a workpiece;
A tip processing portion of a processing means that occupies a position between the divided laser beams divided into two at a position closer to the processing portion than the condensing optical system;
An adjusting optical system that condenses the light emitted from the processed part side and captured by the condensing optical system and propagated through one of the two divided optical paths;
A sensor disposed at a position where the light is condensed by the adjustment optical system;
A laser processing head characterized by comprising: A collimating optical system that collimates input laser light and outputs it as parallel laser light;
A first reflecting mirror that divides the parallel laser beam output from the collimating optical system into two parts, a first split laser beam that has not been reflected and a second split laser beam that has been reflected by reflecting a part of the parallel laser beam output from the collimating optical system When,
While the second divided laser beam reflected by the first reflecting mirror is further reflected and travels in a direction parallel to the first divided laser beam and spatially separated from the first divided laser beam, A second reflecting mirror that transmits light having a wavelength different from the wavelength of the laser light;
A condensing optical system for condensing the first divided laser beam and the second divided laser beam reflected by the second reflecting mirror onto the workpiece;
A tip processing portion of a processing means that occupies a position between the first and second divided laser beams at a position closer to the processing portion than the condensing optical system;
An adjusting optical system that condenses light emitted from the processed part side, captured by the condensing optical system, and transmitted through the second reflecting mirror;
A sensor disposed at a position where the light is condensed by the adjustment optical system;
A laser processing head characterized by comprising: A collimating optical system that collimates input laser light and outputs it as parallel laser light;
A beam splitter that reflects parallel laser light output from the collimating optical system and divides the parallel laser light into a first split laser light and a second split laser light;
A first reflecting mirror that further reflects the first split laser beam and travels in a direction parallel to the parallel laser beam;
The second split laser beam is further reflected and travels in a direction parallel to the parallel laser beam and spatially separated from the first split laser beam, while having a wavelength different from the wavelength of the laser beam. A second reflecting mirror for transmission;
A condensing optical system for condensing the first divided laser beam reflected by the first reflecting mirror and the second divided laser beam reflected by the second reflecting mirror on the workpiece;
A tip processing portion of a processing means that occupies a position between the first and second divided laser beams at a position closer to the processing portion than the condensing optical system;
An adjusting optical system that condenses light emitted from the processed part side, captured by the condensing optical system, and transmitted through the second reflecting mirror;
A sensor disposed at a position where the light is condensed by the adjustment optical system;
A laser processing head characterized by comprising: In any one of Claims 1 thru | or 3,
A laser processing head, comprising: a guide light source that emits guide light that is visible light toward the workpiece. In any one of Claims 1 thru | or 3,
A laser processing head, comprising: a guide light source that obliquely irradiates guide light, which is slit-like visible light, toward the workpiece. In any one of Claims 1 to 5,
The laser processing head, wherein the sensor is an image sensor. In any one of Claims 1 to 5,
The laser processing head, wherein the sensor is a temperature sensor that determines a temperature from a color of light. In any one of Claims 1 thru | or 7,
The laser processing head according to claim 1, wherein a tip processing portion of the processing means is a GMA electrode, a TIG electrode, a filler wire, or a brazing material.

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