Laser power measuring device and laser welding machine

Abstract

The utility model discloses a laser power measuring device and a laser welding machine, and belongs to the technical field of power measurement. The laser power measuring device is applied to the laser welding machine and comprises a supporting column used for being fixedly installed on the laser welding machine; one end of the rotating part is connected with the supporting column, and the rotating part can rotate around the axis of the supporting column; the measuring device is installed at the other end of the rotating piece, and the measuring device can be driven by the rotating piece to move to a detection position right opposite to the laser of the laser welding machine and an avoiding position staggered with the laser. By arranging the rotating piece and the measurer, laser power measurement can be completed safely, efficiently and accurately, the operation is simple, and the working efficiency and the safety are effectively improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power measurement, and particularly relates to a laser power measurement device and a laser welding machine. BACKGROUND

[0002] In the steel industry, the Miba laser welding machine is applied to the normalizing and pickling production line, aiming to weld the heads and tails of two strips of steel together, and is a key equipment for continuous production of the production line. The Miba welding machine laser adopts a Rofin laser, laser is emitted from the inside of the generator, and is transmitted to the weld surface through the outer light path three mirrors to realize the connection of the two strips of steel. The power of the laser is consumed after passing through the outer light path three mirrors. Since the external environment cannot be controlled, long-time production leads to low laser power, and thus the power needs to be checked regularly. The existing detection means is low in efficiency and large in deviation, and has certain safety hazards. CONTENT OF THE UTILITY MODEL

[0003] The application aims to at least solve one of the technical problems existing in the prior art. To this end, the application provides a laser power measurement device and a laser welding machine, which can safely, efficiently and accurately complete laser power measurement, is simple to operate, and effectively improves work efficiency and safety.

[0004] In a first aspect, the application provides a laser power measurement device applied to a laser welding machine, and the laser power measurement device comprises:

[0005] A support column is used for fixed installation on the laser welding machine;

[0006] A rotating member is connected to one end of the support column and is rotatably arranged around the axis of the support column;

[0007] A measurer is installed at the other end of the rotating member, and the measurer is movable to a detection position opposite the laser of the laser welding machine and an avoiding position staggered with the laser under the driving of the rotating member.

[0008] According to the laser power measurement device of the application, the measurer is movable between the detection position and the avoiding position under the driving of the rotating member. When the measurer is located at the detection position, the measurer is opposite the laser to accurately detect the power of the laser. When the measurer is located at the avoiding position, the measurer is staggered with the laser and does not affect the normal welding work. The laser power measurement device can safely, efficiently and accurately complete laser power measurement, is simple to operate, and effectively improves work efficiency and safety.

[0009] According to one embodiment of the application, a limiting structure is arranged between the rotating member and the support column, and the limiting structure is used for limiting the rotating member when the measurer moves to the detection position.

[0010] According to one embodiment of the application, one end of the rotating member is provided with a connecting ring, a side wall of the support column is provided with a connecting groove arranged in a ring shape, and the connecting ring is slidingly installed in the connecting groove.

[0011] According to one embodiment of the present application, one of the side wall of the connecting ring and the side wall of the connecting groove is provided with a limiting groove, and the other is provided with a limiting protrusion, the limiting groove extends along the circumference of the supporting column, and the limiting protrusion is slidably arranged in the limiting groove;

[0012] Wherein, in the case that the measuring device is moved to the detection position, the limiting protrusion is limited by abutting against one end of the limiting groove; and in the case that the measuring device is moved to the avoiding position, the limiting protrusion is limited by abutting against the other end of the limiting groove.

[0013] According to one embodiment of the present application, the connecting ring comprises two connecting arms arranged in a circular arc shape, and the concave sides of the two connecting arms are opposite and are installed in the connecting groove, one end of the two connecting arms is connected with the rotating member, and the other end is detachably connected through the first connecting member.

[0014] According to one embodiment of the present application, the other end of the rotating member is provided with a mounting seat, and the measuring device is detachably mounted on the mounting seat.

[0015] According to one embodiment of the present application, the mounting seat comprises two mounting arms arranged in a concave shape, and the concave sides of the two mounting arms are opposite and clamp the measuring device, one end of the two mounting arms is connected with the rotating member, and the other end is detachably connected through the second connecting member.

[0016] According to one embodiment of the present application, the measuring device comprises:

[0017] a receiving part, which is fixedly installed on the mounting seat and is opposite to the laser when the measuring device is in the detection position;

[0018] a power meter, which is arranged on one side of the receiving part and is connected with the receiving part.

[0019] According to one embodiment of the present application, the supporting column comprises a base, and the supporting column is fixedly installed on the base, and a reinforcing rib is arranged between the supporting column and the base.

[0020] In a second aspect, the present application provides a laser welding machine, which comprises:

[0021] a rack, on which a laser is installed;

[0022] a travelling base connected with the rack, and a movable trolley is arranged on the travelling base;

[0023] The laser power measuring device according to any one of the technical solutions in the first aspect, the supporting column is fixedly installed on the travelling base and is located on one side of the movement track of the trolley, and is dislocated with the movement track of the trolley in the case that the measuring device is in the avoiding position.

[0024] The laser welding machine provided in the second aspect of the present application has the same beneficial effects as the laser power measuring device provided in the first aspect of the present application, which will not be described here again.

[0025] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the description of the embodiments, given in conjunction with the accompanying drawings.

[0027] Figure 1 is one of the structural schematic diagrams of the laser power measuring device provided by the embodiments of the present application;

[0028] Figure 2 is another structural schematic diagram of the laser power measuring device provided by the embodiments of the present application;

[0029] Figure 3 is a structural schematic diagram of a rotating member, a connecting ring and a mounting seat provided by the embodiments of the present application;

[0030] Figure 4 is a structural schematic diagram of a support column and a base provided by the embodiments of the present application.

[0031] REFERENCE NUMERALS

[0032] 1, laser power measuring device; 11, support column; 111, connecting groove; 12, rotating member; 13, connecting ring; 131, connecting arm; 132, first connecting member; 14, mounting seat; 141, mounting arm; 142, second connecting member; 15, measuring device; 151, receiving portion; 152, power meter; 16, base; 17, reinforcing rib. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0034] In the steel industry, the MIBACH laser welding machine is applied to the normalizing and pickling production line, aiming to weld the heads and tails of two coils of strip steel together, which is a key equipment for continuous production of the production line. The MIBACH welding machine laser adopts a Rofin laser, and the laser is emitted from the inside of the generator and transmitted to the weld surface through the external light path three mirrors, realizing the connection of the two strip steels. After the laser passes through the external light path three mirrors, the power is consumed. Since the external environment cannot be controlled, long-time production leads to low laser power, so it is necessary to regularly check the power.

[0035] In the related art, when the laser is tested, the maintenance personnel turns on the red light, aligns the power meter center to the red light (tested, the laser hits the power meter center to measure the loss of the laser power from the light outlet to the weld surface), and places it above the welding wheel without fixing device. The position of the red light is deviated from the laser, and it is placed by feeling. If the deviation is large, the measurement is inaccurate. At the same time, the power meter is placed above the welding wheel and is easy to fall, which has the risk of burning the tester and the welding wheel peripheral parts by the laser, low work efficiency, poor safety and other shortcomings.

[0036] Based on the above considerations, the present application provides a laser power measuring device, which can safely, efficiently and accurately complete the laser power measurement, is simple to operate, and effectively improves the work efficiency and safety.

[0037] The laser power measuring device according to the embodiments of the present application is described below with reference to the accompanying drawings. Figures 1-4 The laser power measuring device according to the embodiments of the present application is described below with reference to the accompanying drawings.

[0038] Please refer to Figure 1 and Figure 2 The laser power measuring device 1 provided by the embodiments of the present application is applied to a laser welding machine, and comprises a support column 11, a rotating part 12 and a measurer 15.

[0039] The support column 11 is used for fixedly mounting on the laser welding machine. The support column 11 serves as the basic structure of the device, is used for fixedly connecting with the laser welding machine, ensures the stability and the accuracy of the position of the whole measuring device, and provides a stable mounting base to ensure the stability of the measurer 15 in different positions.

[0040] The rotating part 12 is connected with the support column 11 at one end and is rotatably arranged around the axis of the support column 11. The rotating part 12 connects the support column 11 and the measurer 15, and drives the measurer 15 to move to different positions by rotating around the axis of the support column 11. The flexible movement of the measurer 15 enables it to accurately align with the laser for measurement and to move to a safe position in a non-measurement state to avoid interfering with the normal operation of the laser welding machine.

[0041] The measurer 15 is installed at the other end of the rotating part 12, and the measurer 15 is movable to a detection position opposite to the laser of the laser welding machine and an avoiding position deviated from the laser under the driving of the rotating part 12.

[0042] The measurer 15 can directly receive the laser and make power measurement, by installing the measurer 15 at the other end of the rotating member 12 to rotate under the driving of the rotating member 12. In the case that the measurer 15 is located at the detection position, the position of the measurer 15 is just opposite to the laser irradiation point of the laser welder, and the distance from the laser outlet is appropriate to accurately determine the loss from the light outlet to the weld. In the case that the measurer 15 is located at the avoiding position, the position is staggered with the laser to avoid the laser and the welding parts, ensure the normal work of the laser welder, and reduce the interference to the production process.

[0043] In actual implementation, the laser center position can be found and marked by the laser power mode "inserting wire" of the laser welder, and then the laser power measurement device 1 is installed on the laser welder, taking the laser center position as the detection position, driving the rotating member 12 to drive the measurer 15 to move to the detection position before welding, and detecting whether the laser power meets the standard. After the detection is completed, the rotating member 12 drives the measurer 15 to move to the avoiding position, and the welding starts.

[0044] According to the laser power measurement device 1 provided by the embodiment of the present application, the measurer 15 is driven by the rotating member 12 to move between the detection position and the avoiding position. When the measurer 15 is located at the detection position, it is opposite to the laser to accurately detect the power of the laser, and when it is located at the avoiding position, it is staggered with the laser to not affect the normal welding work. The laser power measurement can be safely, efficiently and accurately completed, the operation is simple, and the work efficiency and safety are effectively improved.

[0045] Please refer to Figure 1 and Figure 2 In some embodiments, the rotating member 12 can be a rod member, such as a circular tube or a square tube, which has sufficient structural strength and light weight, and a relatively long length to conveniently extend to the detection position.

[0046] According to some embodiments of the present application, a limiting structure is arranged between the rotating member 12 and the supporting column 11, and the limiting structure is used to limit the rotating member 12 when the measurer 15 moves to the detection position.

[0047] By cooperating with the rotating member 12 and the supporting column 11, when the measurer 15 moves to the detection position, the limiting structure can lock the rotating member 12 to prevent the movement of the measurer 15 during the measurement, and ensure the accuracy and safety of the measurement.

[0048] In an example, the rotating member 12 and the supporting column 11 can each be provided with a positioning hole, and when the measurer 15 moves to the detection position, a positioning pin is used to pass through the two positioning holes to limit the rotating member 12 and the supporting column 11.

[0049] In another example, the rotating member 12 and one of the support columns 11 can be provided with a convex part, and the other can be provided with a concave part. When the measuring device 15 is moved to the detection position, the convex part is positioned and clamped with the concave part, so as to limit the rotating member 12 and the support column 11.

[0050] Please refer to Figure 1 , Figure 3 and Figure 4 According to some embodiments of the present application, one end of the rotating member 12 is provided with a connecting ring 13, and the side wall of the support column 11 is provided with a connecting groove 111 arranged in a ring shape. The connecting ring 13 is slidingly installed in the connecting groove 111.

[0051] Through the cooperation of the connecting ring 13 and the connecting groove 111, the sliding connection between the rotating member 12 and the support column 11 is realized, so as to ensure that the rotating member 12 can stably rotate around the axis of the support column 11, and the installation is convenient. In some embodiments, the connecting ring 13 can be made of wear-resistant material to reduce the wear of the connecting ring 13. In some embodiments, a plain bearing can be arranged between the connecting ring 13 and the side wall of the connecting groove 111 to reduce friction loss.

[0052] According to some embodiments of the present application, one of the side wall of the connecting ring 13 and the side wall of the connecting groove 111 is provided with a limiting groove, and the other is provided with a limiting convex part. The limiting groove extends along the circumference of the support column 11, and the limiting convex part is slidingly arranged in the limiting groove. When the measuring device 15 is moved to the detection position, the limiting convex part abuts against one end of the limiting groove to limit the position. When the measuring device 15 is moved to the avoidance position, the limiting convex part abuts against the other end of the limiting groove to limit the position.

[0053] Through the combination of the limiting groove and the limiting convex part, the rotation of the rotating member 12 at a specific angle is limited, so as to ensure that the measuring device 15 accurately reaches the detection position or the avoidance position. The limiting groove extends along the circumference of the support column 11, and cooperates with the sliding of the limiting convex part to ensure the free rotation of the rotating member 12 and provide accurate limiting when the measuring device 15 reaches the predetermined position, so as to avoid position error and facilitate the operation of workers. In some embodiments, the limiting groove and the limiting convex part can limit the rotation angle of the rotating member 12 to 90°.

[0054] In an example, the limiting groove can be arranged on the side wall of the connecting groove 111, and the limiting convex part is arranged on the side wall of the connecting ring 13 and extends into the limiting groove along the axial direction of the support column 11, so that the limiting convex part can slide in the limiting groove.

[0055] In another example, the limiting convex part can be arranged on the side wall of the connecting groove 111, and the limiting groove is arranged on the side wall of the connecting ring 13.

[0056] Please refer to Figure 3 and Figure 4According to some embodiments of the present application, the connecting ring 13 comprises two connecting arms 131 arranged in a circular arc shape, and the concave sides of the two connecting arms 131 are opposite and installed in the connecting groove 111, one end of the two connecting arms 131 is connected with the rotating piece 12, and the other end is detachably connected through the first connecting piece 132.

[0057] Through the two connecting arms 131 arranged in a circular arc shape, the fitting installation with the connecting groove 111 of the support column 11 is realized, and the stable connection between the rotating piece 12 and the support column 11 is ensured. The concave sides of the connecting arms 131 are opposite and installed in the connecting groove 111, which not only ensures the smooth rotation of the rotating piece 12, but also facilitates the installation and maintenance of the device and simplifies the processing cost of the parts.

[0058] Exemplarily, the other end of the two connecting arms 131 is provided with opposite connecting holes, and at least one of the connecting holes is a threaded hole. The screw passing through the two connecting holes realizes the matching connection. When it is necessary to replace and maintain, the screw is unscrewed to separate the two connecting arms 131, and the connecting ring 13 is detached from the connecting groove 111. Moreover, by adjusting the tightening degree of the screw, the assembly tightness of the connecting ring 13 and the connecting groove 111 can be adjusted.

[0059] In another example, the other end of the two connecting arms 131 can be connected through a buckle structure.

[0060] Please refer to Figure 1 and Figure 3 According to some embodiments of the present application, the other end of the rotating piece 12 is provided with a mounting seat 14, and the measurer 15 is detachably installed on the mounting seat 14.

[0061] By providing the mounting seat 14, an installation platform is provided for the measurer 15, and the fixation of the measurer 15 is facilitated. The detachable installation design enables the operator to quickly replace or maintain the measurer 15 without disassembling the entire device, thereby improving the work efficiency. Moreover, the detachability of the measurer 15 allows the user to quickly replace different models or precision measurers 15 according to different measurement requirements, thereby enhancing the adaptability of the device and the accuracy of the measurement.

[0062] Please refer to Figure 3 According to some embodiments of the present application, the mounting seat 14 comprises two mounting arms 141 arranged in a concave shape, and the concave sides of the two mounting arms 141 are opposite and clamp the measurer 15, one end of the two mounting arms 141 is connected with the rotating piece 12, and the other end is detachably connected through the second connecting piece 142.

[0063] The two installation arms 141 are concave, and the concave sides are opposite to the clamping of the measurer 15, which ensures that the measurer 15 is stably and safely installed on the rotating part 12, provides good support and fixing effect, and reduces the measurement error caused by mechanical vibration. The detachable connection of the other end of the installation arm 141 through the second connecting part 142 facilitates the installation and disassembly of the measurer 15, simplifies the maintenance process, and also facilitates the replacement of measurers 15 of different specifications to meet different measurement requirements.

[0064] Exemplarily, the other end of the two installation arms 141 is provided with opposite mounting holes, and at least one of the mounting holes is a threaded hole. The cooperation installation is realized by the screw passing through the two mounting holes. When replacement and maintenance are needed, the screw is unscrewed to separate the two installation arms 141, and the mounting ring is disassembled from the mounting groove. Moreover, the assembly tightness of the mounting ring and the mounting groove can be adjusted by adjusting the tightening degree of the screw.

[0065] In another example, the other end of the two installation arms 141 can be cooperatively installed through a buckle structure.

[0066] Please refer to Figure 1 According to some embodiments of the present application, the measurer 15 includes a receiving part 151 and a power meter 152, which are fixedly installed on the mounting seat 14 and are opposite to the laser when the measurer 15 is located at the detection position; the power meter 152 is arranged on one side of the receiving part 151 and connected with the receiving part.

[0067] The receiving part 151 is fixedly installed on the mounting seat 14, and when the measurer 15 is located at the detection position, it is ensured that it is opposite to the laser to receive the laser energy. The power meter 152 is arranged on one side of the receiving part 151 and connected with the receiving part 151, and is used for measuring the laser energy received by the receiving part 151. The power meter 152 can accurately convert the laser energy into readable data, provide intuitive power reading, and facilitate user understanding and analysis of the laser power.

[0068] Please refer to Figure 4 According to some embodiments of the present application, the support column 11 includes a base 16, and the support column 11 is fixedly installed on the base 16. The support column 11 and the base 16 are provided with a reinforcing rib 17.

[0069] By arranging the base 16, the fixed connection with the laser welding machine is facilitated, the stability of the measuring device during use is ensured, and the measurement error caused by external force or vibration is prevented. By arranging the reinforcing rib 17, the strength and stability of the connection between the support column 11 and the base 16 are enhanced, the vibration resistance and carrying capacity of the whole device are improved, and the stability and safety in different use environments are ensured.

[0070] The present application also provides a laser welding machine.

[0071] The laser welding machine comprises a frame, a travelling base and the laser power measuring device 1 according to any one of the technical solutions described above.

[0072] The frame is provided with a laser, the travelling base is connected with the frame, and a movable trolley is arranged on the travelling base; the supporting column 11 of the laser power measuring device 1 is fixedly arranged on the travelling base and located at one side of the movable track of the trolley, and is dislocated with the movement track of the trolley when the measurer 15 is located at the avoiding position.

[0073] The frame provides a basic frame for the laser welding machine, the laser is arranged on the frame and used to generate laser for welding operation; the travelling base is connected with the frame, and the trolley is movable on the travelling base and used to carry and move workpieces; the laser power measuring device 1 is fixed on the travelling base and cooperates with the movable track of the trolley, and avoids interference with the movement track of the trolley when the measurer 15 is located at the avoiding position. The laser power measuring device 1 does not block the laser path and the movement of the trolley when welding operation is performed, and the laser power can be accurately measured when needed, thereby ensuring the welding quality.

[0074] Exemplarily, when the measurer 15 is located at the avoiding position, the rotating member 12 is parallel to the movable track of the trolley, thereby avoiding interference with the movement of the trolley; when the rotating member 12 is rotated by 90° to be perpendicular to the movable track of the trolley, the measurer 15 is located at the detecting position.

[0075] According to the laser welding machine, the measurer 15 is movable between the detecting position and the avoiding position by driving the rotating member 12, the measurer 15 is opposite to the laser to accurately detect the power of the laser when the measurer 15 is located at the detecting position, and the measurer 15 is dislocated with the laser to not affect normal welding operation when the measurer 15 is located at the avoiding position, so that the laser power measurement can be safely, efficiently and accurately completed, the operation is simple, and the working efficiency and safety are effectively improved.

[0076] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and are not limited in number, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the objects before and after are in an "or" relationship.

[0077] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0078] In the description of the application, "first feature" and "second feature" can include one or more of the features.

[0079] In the description of the application, "a plurality of" means two or more.

[0080] In the description of the application, "above" or "below" the first feature of the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.

[0081] In the description of the application, "above", "over" and "on" the first feature of the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0082] In the description of the application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the description of the application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0083] Although embodiments of the application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A laser power measuring device applied to a laser welding machine, characterized in that, The laser power measuring device comprises: a support column fixedly installed on the laser welding machine; a rotating member connected to one end of the support column and rotatably arranged around the axis of the support column; a measuring device installed on the other end of the rotating member, which is movable to a detection position opposite the laser of the laser welding machine and an avoiding position offset from the laser under the driving of the rotating member; one end of the rotating member is provided with a connecting ring, and the side wall of the support column is provided with a connecting groove arranged in a ring shape, and the connecting ring is slidably installed in the connecting groove; one of the side wall of the connecting ring and the side wall of the connecting groove is provided with a limiting groove, and the other is provided with a limiting protrusion, the limiting groove extends along the circumference of the support column, and the limiting protrusion is slidably arranged in the limiting groove; wherein, in the case that the measuring device moves to the detection position, the limiting protrusion abuts against one end of the limiting groove for limiting; in the case that the measuring device moves to the avoiding position, the limiting protrusion abuts against the other end of the limiting groove for limiting.

2. The laser power measurement device of claim 1, wherein, A limiting structure is arranged between the rotating member and the support column, which is used for limiting the rotating member when the measuring device moves to the detection position.

3. The laser power measurement device of claim 1, wherein, The connecting ring comprises two connecting arms arranged in a circular arc shape, and the concave sides of the two connecting arms are opposite and installed in the connecting groove, one end of the two connecting arms is connected to the rotating member, and the other end is detachably connected through a first connecting member.

4. The laser power measurement device of claim 1, wherein, The other end of the rotating member is provided with a mounting seat, and the measuring device is detachably installed on the mounting seat.

5. The laser power measurement device of claim 4, wherein, The mounting seat comprises two mounting arms arranged in a concave shape, and the concave sides of the two mounting arms are opposite and hold the measuring device, one end of the two mounting arms is connected to the rotating member, and the other end is detachably connected through a second connecting member.

6. The laser power measurement device of claim 5, wherein, The measuring device comprises: a receiving part fixedly installed on the mounting seat and opposite the laser when the measuring device is located at the detection position; a power meter arranged on one side of the receiving part and connected to the receiving part.

7. The laser power measurement device of any one of claims 1-6, wherein, The support column comprises a base, the support column is fixedly installed on the base, and a reinforcing rib is arranged between the support column and the base.

8. A laser welding machine characterized by, It comprises: a rack, a laser is installed on the rack; a travelling base connected to the rack, a movable trolley is arranged on the travelling base; The laser power measuring device according to any one of claims 1-7, the support column is fixedly installed on the travelling base and located on one side of the movement track of the trolley, and is offset from the movement track of the trolley when the measuring device is located at the avoiding position.

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