JP4085715B2 - Laser processing head and laser processing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laser processing head and laser processing equipment for processing a workpiece using laser light. More specifically, the present invention relates to a laser processing head and laser processing equipment that are used by attaching the laser processing head to an articulated robot.
[0002]
[Prior art]
Conventionally, laser processing equipment has been used to perform processing such as welding, cutting, and drilling on workpieces. In laser processing, high-speed and precise processing is possible, but safety measures are important. In particular, in a processing facility using a YAG laser, the periphery of the facility is designated as a laser management area over a predetermined range in order to protect the human body from laser light. A metal shielding plate surrounds the entire circumference of the laser management area, and a special filter for observation windows is provided in a part of it. This filter is formed of a material having optical characteristics as shown in FIG. 8, for example. That is, visible light is not absorbed so much and is transmitted relatively well, while it is a material that is quite opaque to laser light in the YAG laser wavelength region (indicated by a one-dot chain line in the figure). It is a filter made of such a material, and the intensity of the YAG laser beam is 10^-FiveTranslucent filters that can be attenuated to the extent are used for the windows. Since this special filter is very expensive, it is not practical to make the window area too large.
[0003]
In a general YAG laser processing facility, the laser irradiation direction on the workpiece is limited to some extent. That is, assuming a normal work form, the range in which the direct laser beam can reach the outer periphery of the management area is limited to some extent. Laser light reaching in other directions is scattered light and reflected light, which are weak. Therefore, the range where the direct laser beam can reach may be shielded by the metal shielding plate. For other ranges where only scattered or reflected light can reach, 10^-1-10^-3Even a filter with a moderate attenuation factor can be attenuated to a sufficiently safe level. With such an attenuation factor, there is an inexpensive and translucent filter, so it can be used even in a large area.
[0004]
[Problems to be solved by the invention]
However, the above-described conventional laser processing equipment has the following problems. That is, an inexpensive filter cannot be used when a laser processing head is mounted on an articulated robot in order to cope with various types of processing. When an articulated robot is used, it is necessary to consider unexpected robot movement due to robot runaway or teaching mistakes. In other words, it cannot be said that there is no possibility of irradiation in a direction other than the expected irradiation direction for processing. Considering this point, in the laser processing equipment using an articulated robot, there is almost no range where the above-described inexpensive filter can be used. This is because the range in which the articulated robot can operate is wide, so there is almost no range that can be determined when only scattered light or reflected light arrives. As a result, when using an articulated robot, almost all the circumference had to be surrounded by a metal shielding plate. For this reason, laser processing equipment and processes in which laser processing is performed are difficult to see from the surroundings. This, for example, makes it difficult to notice unexpected situations such as equipment failures, and makes it difficult to perform safe and quick recovery.
[0005]
The present invention has been made to solve the problems of the conventional laser processing equipment. In other words, the problem is to provide a laser processing head and a laser processing facility that can be made inexpensive and have good prospects while ensuring safety even if the laser processing head is installed on an articulated robot. It is to provide.
[0006]
[Means for Solving the Problems]
The laser processing head of the present invention, which has been made for the purpose of solving this problem, is a laser processing head that performs laser processing on a processing object by irradiating a laser beam from a laser irradiation port, and the processing object exists at the processing target position. The processing object detection means for detecting whether or not the processing object is detected, and in the normal state, the irradiation of the laser beam is prohibited and the processing object detection means detects that the processing object exists at the processing target position. The laser processing head has an irradiation prohibiting means for canceling the prohibition only when it is present.
[0007]
According to the laser processing head of the present invention, whether or not a processing target exists at the processing target position is detected by the processing target detection means, and when there is no processing target at the processing target position, Laser irradiation is prohibited by the irradiation prohibiting means. The laser beam is irradiated only when the workpiece is present at the machining target position, and the laser beam irradiated at this time correctly strikes the workpiece. Therefore, the laser beam is not irradiated to directions other than the workpiece. Even when this laser processing head is attached to an articulated robot having a large actionable range, it is sufficient to surround only the direction of the processing object with an opaque shielding wall. And in other directions, safety is ensured even with a cheap and translucent shielding wall. As a result, even a facility in which a laser processing head is attached to an articulated robot can be made inexpensive and have good prospects while ensuring safety.
[0008]
  The processing object detection means of the laser processing head according to the present invention is a moving member that is biased in a direction away from the laser irradiation port and pressed by the processing object in a direction approaching the laser irradiation port during processing. AhThe
  At the time of processing, the processing target always exists at the processing target position of the laser processing head. For this reason, the moving member is pressed in a direction approaching the laser irradiation port by the workpiece. Thus, it can be determined that the processing object is at the processing target position.
[0009]
  In addition, the irradiation prohibiting means of the laser processing head according to the present invention canVia linkIn conjunction with this, it is a light-shielding member that protrudes on the optical path of the laser beam from the laser irradiation port in a normal state and retreats from the optical path when the moving member is pressed in the direction approaching the laser irradiation port.The
[0010]
  The moving member is pressed in the direction approaching the laser irradiation port when the processing object is set at the processing target position. If the light shielding member is retracted from the optical path at that time, the laser beam is irradiated to the workpiece without being blocked. For this reason, laser processing is not hindered. On the other hand, in a normal state, since the light shielding member protrudes on the optical path of the laser light, the laser light is blocked by the light shielding member. Therefore, when there is no object to be processed at the position to be processed, irradiation of the laser beam to the outside is prohibited.The
[0011]
  The laser processing equipment of the present invention isAboveA laser processing equipment having a laser processing head and a shielding wall surrounding the laser processing head and an object to be processed. The laser processing head is mounted on an articulated robot., ShieldingThe barrier isat leastLaser processing head in normal processingFrom end to end of workpieceLaser lightTheIrradiationDirect laser light will arrive whenA first shielding plate provided with an opaque material in a certain range and a second shielding plate provided in the remaining range, and the second shielding plate has a visible attenuation factor for laser light from the laser processing head. This is a laser processing facility that is made of a material that is larger than the light attenuation factor.
[0012]
Since the laser processing head of the laser processing equipment of the present invention is prohibited from irradiating laser light except when the processing object is present at the processing target position, the laser light is irradiated in a direction other than the processing object. There is nothing. Therefore, in the equipment in which the laser processing head is attached to the articulated robot, the opaque first shielding wall is provided in a range including the direction in which the laser beam is irradiated from the laser processing head in a normal processing operation. Since the laser beam is shielded by the first shielding wall, safety in that direction is ensured. On the other hand, the second shielding wall provided in the other direction has a larger attenuation rate with respect to the laser light than visible light. In other words, laser light is attenuated to some extent, but visible light is considerably transmitted, and there is a relatively inexpensive one. Since only weak laser light reaches the direction of the second shielding wall, sufficient safety is ensured with such a shielding wall, and the inside can be seen through. As a result, even a facility in which a laser processing head is attached to an articulated robot can be made inexpensive and have good prospects while ensuring safety.
[0013]
Further, the second shielding plate of the laser processing facility according to the present invention has an attenuation rate of 10 with respect to the laser beam from the laser processing head.^-1-10^-3It is desirable that the material is within the range.
This is because there is no problem in providing a large window because there is an inexpensive and translucent material with such an attenuation factor.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
“First Embodiment”
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, the present invention is embodied as a laser processing head attached to an articulated robot and a laser welding equipment using the laser processing head.
[0015]
In the laser welding equipment 1 of the present embodiment, as shown in the plan view of FIG. 1, a laser processing head 10 that irradiates YAG laser light 11 is attached to the tip of a vertical articulated robot 2 installed on the floor. This equipment is centered on the welding equipment. The laser processing head 10 is connected to a laser oscillator 4 by an optical fiber 3. When a welding operation is performed by the laser welding equipment 1, a workpiece 5 that is a welding target is placed at a welding target position corresponding to the focal position of the laser beam emitted from the laser processing head 10.
[0016]
In this laser welding equipment 1, a laser management area 6 is set around the apparatus, and a shielding plate for protecting a human body is provided around the area. A part of the shielding plate is an opaque metallic shielding plate 7, and the remaining part is a translucent simple shielding plate 8. The material of the metal shielding plate 7 does not have to be heavy metal such as lead, and a general material such as iron or aluminum is sufficient. As shown in FIG. 8, the material of the simple shielding plate 8 has such a characteristic that visible light is transmitted to some extent and YAG laser light is not transmitted so much. The simple shielding plate 8 has an attenuation factor of 10 with respect to the YAG laser beam due to such a material.^-1-10^-3It is configured as a semitransparent plate. The simple shielding plate 8 is 10 for YAG laser light.^-FiveCompared to a filter having a high attenuation factor, the cost is low. The metal shielding plate 7 corresponds to the first shielding plate, and the simple shielding plate 8 corresponds to the second shielding plate.
[0017]
Of the boundary of the laser management area 6, the shielding range by the metal shielding plate 7 is determined as follows. First, the irradiation range of the direct laser beam 11 irradiated from the laser processing head 10 during the welding operation is determined from the position of the laser processing head 10 as indicated by a broken line in FIG. Considering that the laser processing head 10 moves from end to end of the workpiece 5, a region D indicated by diagonal lines in FIG. 1 is a range in which a strong direct laser beam of the laser beam 11 can reach. The metal shielding plate 7 is provided so as to surround at least the region D. Or the laser intensity | strength in the boundary of the laser management area 6 may be measured about all the states at the time of a normal welding operation, and the range of the metal shielding board 7 may be determined according to the measurement result. That is, the portion where the measured laser intensity reaches a level harmful to the human body must be surrounded by the metal shielding plate 7. A portion of the boundary of the laser management area 6 other than the shielding range of the metal shielding plate 7 determined in this way is surrounded by the simple shielding plate 8. Since the range covered with the simple shielding plate 8 is sufficiently large, the work process of the laser welding equipment 1 can be well seen from the outside.
[0018]
As shown in FIG. 2, the articulated robot 2 is used with a base 13 installed on the floor surface. This has a plurality of joint parts, and the tip hand part 14 can be moved to various positions and angles by rotating each joint part. A laser processing head 10 to which the optical fiber 3 is connected is attached to the hand portion 14. The articulated robot 2 receives control signals from the outside, sequentially reads out control signals stored in a built-in storage device, and operates according to the control signals. Therefore, various movement commands and work commands can be stored by teaching, and a series of continuous welding operations can be performed. The articulated robot 2 is not limited to that shown in FIG.
[0019]
Next, the laser processing head 10 attached to the hand part 14 of the articulated robot 2 will be described. As shown in FIGS. 3 and 4, the laser processing head 10 has an irradiation port 20 for irradiating the laser beam 11 transmitted by the optical fiber 3 toward the irradiation position. The laser beam 11 shown by a broken line in FIGS. 3 and 4 only shows an optical path when irradiated, and does not mean that the laser beam 11 is always irradiated. A bracket 21, an arm 22, and a link 23 that connects them are attached to the side surface of the laser processing head 10.
[0020]
The bracket 21 is urged downward in the figure by a spring 24. And, it is movable in the vertical direction in the figure along the case 25 fixed to the side surface of the laser processing head 10. The lower portion of the bracket 21 is formed slightly obliquely toward the optical path of the laser beam 11, and a pressing roller 26 is attached to the lower end portion. A stopper 27 protrudes inward and is fixed inside the case 25. When the bracket 21 moves upward in the figure, the bracket 21 comes into contact with the stopper 27. Thereby, the upper limit position of the movement of the bracket 21 is defined. This upper limit position is a position in the welding operation state shown in FIG. At this time, the tip position of the pressing roller 26 and the irradiation focal position of the laser beam 11 are substantially equidistant from the irradiation port 20. On the other hand, FIG. 3 shows a normal state where only the urging force of the spring 24 acts on the bracket 21. This bracket 21 corresponds to a moving member.
[0021]
The arm 22 is attached to the side surface of the laser processing head 10 so as to be rotatable about the shaft 31. In addition, a laser shielding plate 32 made of a material (metal or the like) that is opaque and has sufficient strength with respect to the laser beam 11 is fixed to the lower end portion of the arm 22. In the normal state shown in FIG. 3, the laser shielding plate 32 is in contact with the pressing roller 26 and shields the irradiation position of the laser beam 11. This laser shielding plate 32 corresponds to a light shielding member.
The link 23 is formed in a substantially L shape, and is attached to the side surface of the laser processing head 10 so as to be rotatable about the shaft 33. Further, the bracket 21 and the arm 22 are provided with pins 34 and 35 in the vicinity of the upper end in the drawing, respectively. The pin 34 of the bracket 21 is engaged with a groove 36 provided at the left end of the link 23 in the drawing. Further, the pin 35 of the arm 22 is engaged with a groove 37 provided at the right end of the link 23 in the drawing.
[0022]
With these configurations, the vertical movement of the bracket 21 is converted into the rotation of the arm 22 through the rotation of the link 23. First, in the normal state shown in FIG. 3, since the laser shielding plate 32 is disposed on the optical path of the laser beam 11, the laser beam 11 is shielded by the laser shielding plate 32. This state is a state in which the workpiece 5 is not installed at the welding target position of the laser processing head 10. In a normal welding operation, the laser beam 11 is not irradiated from the irradiation port 20 in this state, but even if the laser beam 11 is irradiated, it is shielded by the laser shielding plate 32. Irradiation light does not leak outside the laser processing head 10. At this time, the laser shielding plate 32 functions as irradiation prohibiting means.
[0023]
From the state of FIG. 3, the work 5 to be welded is set at a predetermined position at the start of the welding operation. Then, the articulated robot 2 is driven to bring the laser processing head 10 close to the workpiece 5. First, the tip end portion of the pressing roller 26 abuts against the workpiece 5 and further presses the laser processing head 10 toward the workpiece 5. Then, the bracket 21 is pushed upward relative to the laser processing head 10 while the spring 24 is contracted. By the movement of the bracket 21, the link 23 is rotated clockwise and the arm 22 is rotated counterclockwise. Therefore, the lower end of the arm 22 moves in the right direction in the figure, and the laser shielding plate 32 moves to a position deviated from the optical path of the laser beam 11. Finally, when the upper end of the bracket 21 comes into contact with the stopper 27, the workpiece 5 is arranged at the focal position of the laser beam 11 that is the position to be welded. As a result, the welding work state shown in FIG. 4 is obtained. If the laser beam 11 is irradiated from the irradiation port 20 in this state, the laser beam 11 is irradiated to the workpiece 5 and the workpiece 5 is welded. At this time, the bracket 21 functions as a workpiece detection means.
[0024]
When the welding is completed, the irradiation of the laser beam 11 is stopped and the articulated robot 2 is driven to move the laser processing head 10 away from the workpiece 5. Accordingly, the laser machining head 10 is no longer pressed by the workpiece 5, and the bracket 21 is pushed back downward in the figure by the urging force of the spring 24. As a result, the link 23 is rotated counterclockwise and the arm 22 is rotated clockwise. As a result, the lower end portion of the arm 22 moves to the left in the drawing until the laser shielding plate 32 contacts the pressing roller 26, and returns to the normal state of FIG. It is to be noted that the welding operation can be performed linearly using the pressing roller 26. That is, the laser processing head 10 is moved so that the pressing roller 26 rolls on the surface of the work 5 while the laser processing head 10 is pressed against the work 5 for welding. Thereby, welding can be performed smoothly and continuously while maintaining the focal length with respect to the workpiece 5. When the linear welding is completed, the laser processing head 10 may be moved away from the workpiece 5 as described above.
[0025]
On the other hand, let us consider a case where the laser processing head 10 faces in an unexpected direction due to unexpected causes such as runaway of the articulated robot 2 or teaching mistakes. Of course, in this case, the laser processing head 10 is detached from the workpiece 5. Therefore, the arrangement of the workpiece 5 is no longer the position to be welded with respect to the laser processing head 10. That is, the bracket 21 is in the normal state shown in FIG. 3, and the optical path of the laser light 11 is shielded by the laser shielding plate 32. Therefore, irradiation of the laser beam 11 is prohibited outside the laser processing head 10.
[0026]
Thereby, the laser beam 11 is irradiated to the outside of the laser processing head 10 only when the workpiece 5 exists at the position to be welded and a welding operation is being performed. For this reason, the range in which the direct laser beam 11 may reach is limited to the region D shown in FIG. Since all the outer periphery in this area D is covered with the metal shielding plate 7, all the direct laser light 11 is shielded by the metal shielding plate 7. The other portions are only attenuated by the simple shielding plate 8 because they only receive weak scattered light and reflected light. Therefore, the safety for the human body is ensured by the shielding plate in which the metallic shielding plate 7 and the simple shielding plate 8 are combined.
[0027]
As described in detail above, according to the laser welding equipment 1 of the first embodiment, when the workpiece 5 is present at the welding target position of the laser processing head 10 for welding work, the pressing roller 26 is moved by the workpiece 5. Is pressed. As a result, the arm 22 is rotated counterclockwise in conjunction with the bracket 21 and the link 23, and the laser shielding plate 32 moves to a position off the optical path of the laser beam 11. In this state, the workpiece 5 can be irradiated with the laser beam 11 and welded. On the other hand, when the workpiece 5 is not present at the welding target position of the laser processing head 10, the bracket 21 is pushed downward by the urging force of the spring 24 in the drawing. As a result, the arm 22 is rotated clockwise in conjunction with the bracket 21 and the link 23, and the laser shielding plate 32 is disposed on the optical path of the laser beam 11. Therefore, in this normal state, the laser beam 11 is shielded by the laser shielding plate 32. As a result, it is only necessary to provide the metal shielding plate 7 having a high attenuation rate only in a range where the irradiation light can reach by welding work. A shielding plate 8 can be used. Therefore, even laser welding equipment using the articulated robot 2 can be made inexpensive and have good prospects while ensuring safety.
[0028]
“Second Embodiment”
Hereinafter, a second embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the laser welding equipment of this embodiment, a part of the laser processing head 40 is only different from the laser processing head 10 of the laser welding equipment 1 of the first embodiment, so only the different parts will be described.
[0029]
In the laser machining head 40 of the second embodiment, an air hose 41 and an air vent valve 42 are attached to the case 25 instead of the spring 24 as shown in FIG. The laser processing head 40 is used in a state where air is introduced into the case 25 through the air hose 41 and the bracket 21 is urged downward in the figure by the pressure of the air. The air vent valve 42 is for discharging unnecessary air to the outside. The air pressure can be adjusted according to the amount of air introduced. Therefore, the urging force applied to the bracket 21 and the pressing force of the pressing roller 26 against the work 5 can be adjusted.
[0030]
Also in the laser machining head 40 of the second embodiment, the laser beam 11 is shielded by the laser shielding plate 32 in a normal state where the workpiece 5 is not present at the welding target position of the laser machining head 40. Further, in the welding operation state where the workpiece 5 exists at the welding target position of the laser processing head 40, the laser beam 11 is irradiated onto the workpiece 5. These points are the same as those of the laser processing head 10 of the first embodiment. Therefore, as in the first embodiment, a predetermined range of the shielding plates surrounding the laser management area 6 can be used as the simple shielding plate 8. On the other hand, unlike the spring 24 of the first embodiment, the urging force applied to the bracket 21 can be adjusted by the amount of air introduced. As a result, it is possible to make fine adjustments such as changing the pressing force of the pressing roller 26 depending on the type of the workpiece 5 and the content of the welding operation.
[0031]
As described above in detail, according to the laser welding equipment of the second embodiment, as in the first embodiment, even in the laser welding equipment using the articulated robot 2, safety is ensured. While ensuring, it can be cheap and have good prospects. Furthermore, the pressing force against the workpiece 5 can be adjusted. If an oil hose and an oil vent valve are used in place of the air hose 41 and the air vent valve 42, the hydraulic pressure can be used instead of the air pressure as the urging force for the bracket 21.
[0032]
“Third Embodiment”
Hereinafter, a third embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the laser welding equipment of the present embodiment, a part of the laser processing head 50 is only different from the laser processing head 10 of the laser welding equipment 1 of the first embodiment, and therefore only different parts will be described.
[0033]
As shown in FIG. 6, the laser processing head 50 according to the third embodiment is provided with a switch 51 instead of the arm 22 and the link 23 of the laser processing head 10. The conducting wire opened and closed by the switch 51 is connected to the power input line of the laser oscillator 4. The switch 51 is an automatic OFF type limit switch, and the movable piece thereof is disposed at the upper part of the bracket 21 in the figure.
[0034]
In the normal state shown in FIG. 6, the bracket 21 is pushed downward in the figure by the spring 24, so that the bracket 21 and the movable piece of the switch 51 are not in contact with each other. Accordingly, the switch 51 is in the OFF state, and no power is supplied to the laser oscillator 4, so that the laser beam 11 is not irradiated. When the workpiece 5 is set at the welding target position of the laser processing head 50 and the pressing roller 26 is pressed against the workpiece 5 and the bracket 21 moves upward in the figure, the movable piece of the switch 51 is pushed up by the bracket 21. It is done. As a result, the switch 51 is turned on and power is supplied to the laser oscillator 4. That is, the laser beam 11 is not irradiated except when the workpiece 5 is present at the welding target position of the laser processing head 50 and the welding operation state is entered. As a result, the laser processing head 50 does not require the laser shielding plate 32 and can be implemented with a simpler configuration.
[0035]
As described above in detail, according to the laser welding equipment of the third embodiment, as in the first embodiment, even in the laser welding equipment using the articulated robot 2, safety is ensured. While ensuring, it can be cheap and have good prospects. Furthermore, according to this embodiment, the laser beam 11 is not irradiated even if a laser irradiation signal is input at an incorrect position due to runaway of the articulated robot 2, a teaching error, etc. It becomes.
[0036]
“Fourth Embodiment”
Hereinafter, a fourth embodiment embodying the present invention will be described in detail with reference to the accompanying drawings. In the laser welding equipment of this embodiment, a part of the laser processing head 60 is only different from the laser processing head 50 of the laser welding equipment of the third embodiment, and therefore only the different parts will be described.
[0037]
As shown in FIG. 7, the laser machining head 60 of the fourth embodiment is provided with a connection terminal 61 at the upper end portion of the bracket 21 in the drawing, instead of the switch 51 of the third embodiment. . Further, the stopper 27 is made of a conductive material, and functions as a switch by contact / non-contact between the connection terminal 61 and the stopper 27. Then, similarly to the switch 51 of the third embodiment, the power input line of the laser oscillator 4 is connected so that it can be opened and closed. As a result, power is supplied to the laser oscillator 4 only while the workpiece 5 is present at the position to be welded of the laser processing head 60 and the bracket 21 is pushed upward in the drawing and the connection terminal 61 and the stopper 27 are in contact with each other. Is done.
[0038]
As described above in detail, according to the laser welding equipment of the fourth embodiment, as in the third embodiment, even in the laser welding equipment using the articulated robot 2, safety is ensured. While ensuring, it can be cheap and have good prospects.
[0039]
Note that this embodiment is merely an example, and does not limit the present invention. Therefore, the present invention can naturally be improved and modified in various ways without departing from the gist thereof.
For example, in each of the above embodiments, the present invention is applied to laser welding equipment, but can be applied to other processing equipment as long as it is equipment that uses a laser processing head. For example, the present invention can also be implemented in laser processing equipment such as cutting and drilling.
Further, for example, in each of the above embodiments, the pressing roller 26 is attached to the tip of the bracket 21, but instead of the pressing roller 26, a rolling ball may be used. Alternatively, the tip portion of the bracket 21 can be formed of a material that is slippery and can slide on the surface of the workpiece 5. If it does in this way, it can be moved in any direction along the work 5.
[0040]
【The invention's effect】
As is clear from the above description, according to the laser processing head and the laser processing equipment of the present invention, even if the laser processing equipment uses an articulated robot, it is inexpensive and has good prospects while ensuring safety. be able to.
[Brief description of the drawings]
FIG. 1 is a plan view showing the overall configuration of a laser welding facility.
FIG. 2 is an external view showing an external appearance of an articulated robot.
FIG. 3 is a side view showing the configuration of the laser processing head according to the first embodiment.
FIG. 4 is a side view showing the configuration of the laser processing head according to the first embodiment.
FIG. 5 is a side view showing a configuration of a laser processing head according to a second embodiment.
FIG. 6 is a side view showing a configuration of a laser processing head according to a third embodiment.
FIG. 7 is a side view showing a configuration of a laser processing head according to a fourth embodiment.
FIG. 8 is a graph showing characteristics of a special filter.
[Explanation of symbols]
1 Laser welding equipment
2 Articulated robot
5 Work
7 Metal shield
8 Simple shielding plate
10, 40, 50, 60 Laser processing head

Claims (3)

In a laser processing head that irradiates a laser beam from a laser irradiation port and processes a workpiece,
Whether the processing object exists at the processing target position by being biased in a direction away from the laser irradiation port and moved by being pressed by the processing object in a direction approaching the laser irradiation port during processing Processing object detection means for detecting whether or not,
In conjunction with the movement of the workpiece detection means via a link, in the normal state, the laser beam irradiation is prohibited by projecting onto the optical path of the laser beam from the laser irradiation port , and the workpiece to be processed at the processing target position . the laser processing head and having an irradiation prohibiting means for the workpiece detecting means for canceling the prohibition retracted from is the optical path pressed in the direction approaching the laser irradiation port by things. A laser processing facility comprising: the laser processing head according to claim 1; and a shielding wall surrounding the laser processing head and an object to be processed.
The laser processing head is mounted on an articulated robot ,
Before Symbol shielding wall,
A first shielding plate provided with an opaque material to cormorants area by receive a direct laser light when irradiated with an end from to the end the laser beam of the object in the laser machining head in at least a normal machining operation,
A second shielding plate provided in the remaining area;
The laser processing equipment, wherein the second shielding plate is made of a material having an attenuation rate with respect to laser light from the laser processing head larger than an attenuation rate with respect to visible light. In the laser processing equipment according to claim 2 ,
The second shielding plate has an attenuation rate with respect to the laser beam from the laser processing head.
Laser processing equipment characterized by being made of a material in the range of 10 ^-1 to 10 ^-3 .

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