CN209754273U

CN209754273U - Laser welding detection equipment

Info

Publication number: CN209754273U
Application number: CN201920068597.1U
Authority: CN
Inventors: 黄学浩; 吴楚辉; 王永峰; 熊辉彪
Original assignee: Shenzhen Yuzhan Precision Technology Co ltd
Current assignee: Fulian Yuzhan Technology Shenzhen Co Ltd
Priority date: 2019-01-15
Filing date: 2019-01-15
Publication date: 2019-12-10
Anticipated expiration: 2029-01-15

Abstract

The utility model provides a laser welding detection device, which comprises a welding device, an identification device, a detection device, a controller and a display device; the recognition device is used for scanning the code to recognize the workpiece, the jig corresponding to the workpiece and the welding parameters, and the controller can control the welding device to weld according to the welding parameters obtained by the recognition device; the detection device is positioned on a light path of laser reflected by the workpiece and comprises a first sensor, a second sensor and a third sensor, and the controller judges whether the workpiece has poor welding according to the plasma concentration, the reflected laser energy and the molten pool temperature fed back by the detection device; the controller can control the display device to display the identification information acquired by the identification device, and can also control the display device to pop up an alarm window when the workpiece is judged to have poor welding. The utility model discloses can be automatic the defective products that appear among the nondestructive identification laser welding process.

Description

Laser welding detection equipment

Technical Field

The utility model relates to the field of welding technique, especially, relate to a laser welding check out test set.

Background

Welding is the most important connection mode of steel structures, however, in the existing welding technology, it is difficult to completely avoid poor items such as welding slag splashing, welding holes, insufficient solder, cracks, air holes and the like, and therefore, the welded workpieces need to be detected to remove welding defective products. The traditional detection mode (visual and CCD camera) can only detect the quality of welding appearance surfaces such as welding slag, welding holes and the like, and can not effectively detect poor welding such as insufficient solder, cracks, air holes and the like; the X-ray CT mode detection can detect poor cold joint caused by overlarge welding holes, air holes and gaps, but can not detect poor cold joint, cracks and other welding caused by insufficient fusion depth; the slicing method can detect all defective items, but destroys the welded product and cannot be applied to production work.

SUMMERY OF THE UTILITY MODEL

In view of the above situation, the present invention provides a laser welding detection device capable of automatically identifying defective products occurring in a laser welding process without damage and performing alarm interception.

In order to achieve the above object, the utility model provides a laser welding detection device, including welding set, welding set includes laser emitter and the galvanometer that is used for transmitting laser, the laser that laser emitter transmitted is incident on the work piece of waiting to weld through the galvanometer, laser welding detection equipment still includes recognition device, detection device, controller and display device, welding set, recognition device, detection device, display device respectively with the controller electric connection; the recognition device is used for scanning the code to recognize the workpiece, and a jig and welding parameters corresponding to the workpiece, and the controller can control the welding device to weld according to the welding parameters obtained by the recognition device; the detection device is positioned on a light path of laser reflected by the workpiece and comprises a first sensor for detecting plasma concentration, a second sensor for detecting reflected laser energy and a third sensor for detecting molten pool temperature, and the controller judges whether the workpiece has poor welding according to the plasma concentration, the reflected laser energy and the molten pool temperature fed back by the detection device; the controller can control the display device to display the identification information acquired by the identification device.

Furthermore, the welding device further comprises a collimating device and a first lens which are positioned on a light path between the laser emitter and the galvanometer, and laser emitted by the laser emitter is collimated by the collimating device and then reflected by the first lens to enter the galvanometer.

Furthermore, the first lens and the collimating device form an included angle of 45 degrees, and an entrance angle of laser emitted by the laser emitter and incident on the first lens after being collimated by the collimating device is 45 degrees.

Furthermore, the welding device also comprises a field lens positioned on a light path between the galvanometer and the workpiece, and laser emitted by the laser emitter is focused by the field lens after passing through the galvanometer so as to be converged on the workpiece.

Furthermore, the detection device further comprises a second lens and a third lens which are sequentially arranged along the light path, the laser reflected by the workpiece can be partially reflected and partially transmitted by the second lens, and the laser transmitted by the second lens is partially reflected and partially transmitted by the third lens; the laser light reflected by the second mirror enters the first sensor, the laser light reflected by the third mirror enters the second sensor, and the laser light transmitted by the third mirror enters the third sensor.

Further, the second mirror and the third mirror are arranged in parallel, an incident angle of the laser beam reflected by the workpiece on the second mirror is 45 °, and an incident angle of the laser beam on the third mirror is 45 °.

Furthermore, the laser welding detection equipment also comprises a photographing device connected with the controller, the photographing device can transmit the image information of the workpiece to the controller, and the controller judges whether the positioning of the workpiece in the welding process is accurate according to the image information and can judge whether a poor welding point exists in the appearance of the workpiece.

Further, the photographing device comprises a CCD camera and a light source for emitting visible light, and the visible light emitted by the light source is incident on the workpiece and reflected by the workpiece to enter the CCD camera.

Further, the laser welding detection equipment further comprises a signal amplifier, and the first sensor, the second sensor and the third sensor are respectively connected with the controller through the signal amplifier.

Furthermore, the first sensor, the second sensor and the third sensor are all photoelectric sensors, and can convert received optical signals into electric signals and transmit the electric signals to the controller.

The utility model provides a laser welding detection device passes through recognition device, detection device, controller and display device, not only can carry out high-efficient, high quality welding to the work piece, and the defective products that can also appear in the automatic nondestructive identification laser welding process are reported to the police the interception. In addition, the jig and the welding parameters of the defective products can be tracked through the identification device, and the reason for the defective products can be judged subsequently.

Drawings

Fig. 1 is a block diagram of a laser welding detection apparatus according to an embodiment of the present invention.

Fig. 2 is a block diagram showing a configuration of a welding apparatus in the laser welding detection apparatus shown in fig. 1.

Fig. 3 is a schematic perspective view of a welding device, a detection device, and a photographing device in the laser welding detection device shown in fig. 1.

Fig. 4 is a schematic view of the optical paths between the welding device, the detection device and the workpiece shown in fig. 3.

Description of the main elements

Laser welding detection equipment	100
		Welding device	10
Laser transmitter	11
		Vibrating mirror	12
Collimating device	13
		First lens	14
Scene lens	15
		Identification device	20
Detection device	30
		First sensor	31
Second sensor	32
		Third sensor	33
Second lens	34
		Third lens	35
Controller	40
		Display device	50
Photographing device	60
		CCD camera	61
Light source	62
		Workpiece	200

The following detailed description of the invention will be further described in conjunction with the above-identified drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a preferred embodiment of the present invention provides a laser welding detection apparatus 100, which includes a welding device 10, an identification device 20, a detection device 30, a controller 40 and a display device 50, wherein the welding device 10, the identification device 20, the detection device 30 and the display device 50 are electrically connected to the controller 40 respectively.

The working principle of the laser welding detection device 100 is as follows: the welding device 10 can emit laser and irradiate the laser onto a workpiece 200 (as shown in fig. 4) for welding, the recognition device 20 can scan and recognize the workpiece 200 and a jig and welding parameters corresponding to the workpiece 200 and transmit the recognition information to the controller 40, and the controller 40 can store the recognition information and control the welding device 10 to weld according to the welding parameters in the recognition information. A small part of laser light incident on the workpiece 200 is reflected and enters the detection device 30, the detection device 30 obtains detection information such as plasma concentration, reflected laser energy, and molten pool temperature in the welding process according to the laser light reflected from the workpiece 200, and transmits the detection information to the controller 40, and the controller 40 can judge whether the workpiece 200 has poor welding according to the detection information. In addition, the controller 40 can control the display device 50 to display the identification information transmitted from the identification device 20, and can also control the display device 50 to pop up an alarm window when it is determined that the welding failure of the workpiece 200 exists.

Referring to fig. 2 to 4, the welding device 10 includes a laser emitter 11 for emitting laser and a galvanometer 12, wherein the laser emitted by the laser emitter 11 is incident on a workpiece 200 to be welded through the galvanometer 12. It will be appreciated that the galvanometer 12 can adjust the shape and position of the laser beam incident on the workpiece 200 to suit the welding requirements of the workpiece 200.

Further, the welding device 10 may further include a collimating device 13, a first lens 14, and a field lens 15. The collimating device 13 and the first lens 14 are located on a light path between the laser emitter 11 and the galvanometer 12, and laser emitted by the laser emitter 11 is reflected by the first lens 14 to enter the galvanometer 12 after being collimated by the collimating device 13. The field lens 15 is located on the light path between the galvanometer 12 and the workpiece 200, and the laser emitted by the laser emitter 11 passes through the galvanometer 12 and is focused by the field lens 15 to be converged on the workpiece 200.

In this embodiment, the first lens 14 and the collimating device 13 form an included angle of 45 °, and an incident angle of the laser emitted by the laser emitter 11 and incident on the first lens 14 after being collimated by the collimating device 13 is 45 °.

In this embodiment, the identification device 20 may be a scan gun, and the laser welding detection apparatus 100 can trace the welded workpiece 200 and the jig and welding parameters corresponding to the workpiece 200 through the identification device 20 and the controller 40 storing the identification information, which is beneficial to subsequently determining the reason of poor welding. If the poor welding is caused by the abnormal jig, the plurality of workpieces 200 adopting the same abnormal jig can generate similar poor welding conditions, and the controller 40 can draw a conclusion that the jig is abnormal and provide identification information of the abnormal jig when the number of the workpieces 200 generating the above conditions reaches a first preset value, so that the abnormal jig can be conveniently detected manually. If the welding failure is caused by abnormal welding parameters, similar welding failure conditions can be caused to occur on a plurality of workpieces 200 adopting different jigs, and the controller 40 can draw a conclusion that the welding parameters are abnormal when the workpieces 200 with the conditions reach the second preset value, so that the welding parameters of the equipment can be conveniently adjusted manually and subsequently. It should be noted that, in other embodiments, a storage device may be additionally provided to store the identification information obtained by the identification device 20, and the controller 40 is electrically connected to the additional storage device, so as to achieve the effect of extracting the identification information.

The detection device 30 is located on the optical path of the laser light reflected from the workpiece 200, and includes a first sensor 31 for detecting the plasma concentration, a second sensor 32 for detecting the reflected laser light energy, and a third sensor 33 for detecting the molten pool temperature. It should be noted that, in the laser welding process, plasma cloud is generated, the pinhole effect of reflected laser energy and the fluctuation of the temperature of the molten pool are affected, the three phenomena can indirectly reflect the quality of welding, and the plasma concentration, the reflected laser energy and the temperature of the molten pool can be monitored by light of different wave bands.

Specifically, the first sensor 31, the second sensor 32, and the third sensor 33 are all photoelectric sensors, and can convert received light signals into electric signals and transmit the electric signals to the controller 40.

Further, the laser welding detection apparatus 100 may further include a signal amplifier (not shown), and the first sensor 31, the second sensor 32, and the third sensor 33 are respectively connected to the controller 40 through the signal amplifier to achieve the signal amplification effect.

In this embodiment, the detecting device 30 further includes a second lens 34 and a third lens 35, and the second lens 34 and the third lens 35 are located on the light path of the laser beam emitted from the workpiece 200 and are sequentially disposed. The laser light reflected from the workpiece 200 is partially reflected and partially transmitted by the second mirror 34, and the laser light transmitted by the second mirror 34 is partially reflected and partially transmitted by the third mirror 35. The laser light transmitted by the second mirror 34 enters the first sensor 31, the laser light reflected by the third mirror 35 enters the second sensor 32, and the laser light transmitted by the third mirror 35 enters the third sensor 33.

Specifically, the second mirror 34 is disposed parallel to the third mirror 35, and the incident angle of the laser light reflected from the workpiece 200 incident on the second mirror 34 is 45 °, and the incident angle of the laser light incident on the third mirror 35 is 45 °.

Further, the laser welding detection apparatus 100 further includes a photographing device 60 connected to the controller 40, the photographing device 60 can transmit image information of the workpiece 200 to the controller 40, and the controller 40 can determine whether the positioning of the workpiece 200 during the welding process is accurate according to the image information and can determine whether a welding failure point exists in the appearance of the workpiece 200. Specifically, the photographing device 60 includes a CCD camera 61 and a light source 62 for emitting visible light, and the visible light emitted by the light source 62 is incident on the workpiece 200 and reflected by the workpiece 200 to enter the CCD camera 61.

In addition, other changes may be made by those skilled in the art without departing from the spirit of the invention, and it is intended that all such changes be considered within the scope of the invention.

Claims

1. The utility model provides a laser welding check out test set, includes welding set, welding set is including the laser emitter and the mirror that shakes that are used for transmitting laser, the laser that laser emitter transmitted is through shake the mirror incident to waiting to weld on the work piece which its characterized in that: the laser welding detection equipment further comprises an identification device, a detection device, a controller and a display device, wherein the welding device, the identification device, the detection device and the display device are respectively and electrically connected with the controller; the recognition device is used for scanning the code to recognize the workpiece, and a jig and welding parameters corresponding to the workpiece, and the controller can control the welding device to weld according to the welding parameters obtained by the recognition device; the detection device is positioned on a light path of laser reflected by the workpiece and comprises a first sensor for detecting plasma concentration, a second sensor for detecting reflected laser energy and a third sensor for detecting molten pool temperature, and the controller judges whether the workpiece has poor welding according to the plasma concentration, the reflected laser energy and the molten pool temperature fed back by the detection device; the controller can control the display device to display the identification information acquired by the identification device.

2. The laser welding inspection apparatus of claim 1, wherein: the welding device further comprises a collimating device and a first lens which are positioned on a light path between the laser transmitter and the galvanometer, and laser emitted by the laser transmitter is reflected by the first lens to enter the galvanometer after being collimated by the collimating device.

3. The laser welding inspection apparatus of claim 2, wherein: the first lens and the collimating device form an included angle of 45 degrees, and the incident angle of laser emitted by the laser emitter, which is collimated by the collimating device and then enters the first lens, is 45 degrees.

4. The laser welding inspection apparatus of claim 1, wherein: the welding device further comprises a field lens positioned on a light path between the galvanometer and the workpiece, and laser emitted by the laser emitter is focused by the field lens after passing through the galvanometer so as to be converged on the workpiece.

5. The laser welding inspection apparatus of claim 1, wherein: the detection device further comprises a second lens and a third lens which are sequentially arranged along a light path, the laser reflected by the workpiece can be partially reflected and partially transmitted by the second lens, and the laser transmitted by the second lens is partially reflected and partially transmitted by the third lens; the laser light reflected by the second mirror enters the first sensor, the laser light reflected by the third mirror enters the second sensor, and the laser light transmitted by the third mirror enters the third sensor.

6. The laser welding inspection apparatus of claim 5, wherein: the second lens and the third lens are arranged in parallel, the incident angle of the laser reflected by the workpiece on the second lens is 45 degrees, and the incident angle of the laser incident on the third lens is 45 degrees.

7. The laser welding inspection apparatus of claim 1, wherein: the laser welding detection equipment further comprises a photographing device connected with the controller, the photographing device can transmit image information of the workpiece to the controller, and the controller judges whether positioning in the welding process of the workpiece is accurate according to the image information and can judge whether poor welding points exist in the appearance of the workpiece.

8. The laser welding inspection apparatus of claim 7, wherein: the photographing device comprises a CCD camera and a light source for emitting visible light, and the visible light emitted by the light source is incident on the workpiece and is reflected by the workpiece to enter the CCD camera.

9. The laser welding inspection apparatus of claim 1, wherein: the laser welding detection equipment further comprises a signal amplifier, and the first sensor, the second sensor and the third sensor are respectively connected with the controller through the signal amplifier.

10. The laser welding inspection apparatus of claim 1, wherein: the first sensor, the second sensor and the third sensor are all photoelectric sensors and can convert received optical signals into electric signals and transmit the electric signals to the controller.