Laser welding gun test system and test method

Abstract

The invention belongs to the technical field of equipment detection, and discloses a laser welding gun testing system and a testing method.The laser welding gun testing system comprises a testing device and a light emitting testing module, and the light emitting testing module comprises a light emitting module, a light path module, a light metering module and a processing unit; and the control module is connected with the testing module and is used for comparing the parameter information including the current light emitting parameters measured by the testing device with preset parameter information so as to judge whether the light emitting parameters are qualified or not. According to the invention, the actual light emitting parameters of the welding gun can be calculated according to the light emitting parameters of the amplified light spots, and corresponding adjustment or judgment can be made, so that more accurate test of the light path is realized, errors are effectively reduced, the working efficiency is improved, automatic test and higher-precision light path test of the laser handheld welding gun can be realized, and the test accuracy is improved. Manual detection is omitted, the testing efficiency is improved, the production cost is reduced, and intelligent recording management is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of equipment detection, and in particular relates to a laser welding gun testing system and a testing method. Background Art

[0002] At present, the testing of handheld laser welding guns mainly relies on manual testing, and the optical path testing scheme is mostly visual, and manual statistics are used to record test information and management information, which will cause the following problems:

[0003] 1. Low efficiency;

[0004] 2. Poor test consistency and low accuracy;

[0005] 3. The optical path is mostly visually inspected, with poor accuracy;

[0006] 4. Manual recording is prone to errors and mistakes;

[0007] 5. Without intelligent management, production traceability cannot be achieved. Summary of the invention

[0008] In view of this, an object of the present invention is to provide a laser welding gun testing system and testing method to solve the problem of poor precision and inaccuracy in the existing laser welding gun testing due to manual visual inspection of the optical path.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] In one aspect, a laser welding gun testing system comprises:

[0011] A testing device, comprising a light emission testing module, the light emission testing module comprising a light emitting module, an optical path module, a photometric module and a processing unit, the light emitting module is used to pass laser light into a welding gun, the optical path module is connected to a light outlet of the welding gun and is used to amplify the light incident into the optical path module to a preset multiple, the photometric module is connected to the light outlet of the optical path module and is used to detect a light spot amplified to a preset multiple to obtain amplified light emission parameters after the light spot is amplified, the amplified light emission parameters include a zero point position and a swing width, and the processing unit is used to calculate current light emission parameters of the light on the welding gun according to the amplified light emission parameters; and

[0012] The control module is connected to the test module and is used to compare the parameter information including the current light output parameters measured by the test device with the preset parameter information to determine whether the parameters are qualified.

[0013] In a possible implementation, the optical path module includes a light guide column and a light shielding layer located outside the light guide column, the light guide column is made of a light guiding material and has an extended length that amplifies the laser to a preset multiple.

[0014] In a possible implementation, the light metering module includes a test circuit board, which includes a plurality of photosensitive diodes arranged in parallel to cover a light spot magnified to a preset multiple, and outputs a first signal to the processing unit when the photosensitive diode is illuminated, and outputs a second signal to the processing unit when the photosensitive diode is not illuminated, and the processing unit obtains the amplified light output parameters according to the first signal and the second signal of the photosensitive diode on the test circuit board and calculates the current light output parameters based on the amplified light output parameters.

[0015] In a possible implementation, there are multiple light guides, and the light board test module also includes multiple test interfaces corresponding to each light guide and used for the welding gun to emit light. The photosensitive diode on the test circuit board simultaneously covers the light spot emitted by each light guide.

[0016] In a possible implementation, the parameter information also includes state parameter information;

[0017] The laser welding gun test system also includes an acquisition module, which is used to collect status parameter information under the operation state of the welding gun, and the status parameter information includes one or more of the welding gun protection mirror temperature, focusing mirror temperature, welding gun protection mirror plug-in status, focusing mirror plug-in status, safety interlock information, motor operation information, light output button status information, and welding gun whole machine power consumption information.

[0018] In a possible implementation, the control module includes a processing and computing unit and a communication unit connected to the processing and computing unit, the processing and computing unit includes an AI edge computing chip, and the AI ​​edge computing chip is connected to the acquisition module through the communication unit.

[0019] In a possible implementation, the control module also includes a liquid crystal display unit and a network interface connected to the AI ​​edge computing chip.

[0020] In a possible implementation, the control module further includes an identification unit and a storage unit respectively connected to the processing and computing unit, the identification unit is used to identify the preset coding information of the welding gun and obtain the equipment information of the welding gun, and the storage unit is used to store the welding gun test information.

[0021] In a possible implementation, the testing device further includes a fixture for installing a welding gun to connect with the light output testing module, the fixture is provided with a first sensor for detecting whether the welding gun is installed in place, and the first sensor is connected to the control module.

[0022] On the other hand, a laser welding gun testing method is also provided, comprising the following steps:

[0023] Read the preset coding information of the welding gun to be tested to obtain the equipment information of the welding gun;

[0024] Obtaining state parameter information of the welding gun to be tested, wherein the state parameter information includes one or more of welding gun protection lens temperature, focusing lens temperature, welding gun protection lens plug-in status, focusing lens plug-in status, safety interlock information, motor operation information, light output button status information, and welding gun whole machine power consumption information;

[0025] The current light emission parameters of the welding gun to be tested are detected by a testing device; wherein the testing device comprises a light emission testing module, the light emission testing module comprises a light emitting module, an optical path module, a light measuring module and a processing unit, the light emitting module is used to pass laser into the welding gun, the optical path module is connected to the light emission port of the welding gun and is used to amplify the light incident into the optical path module to a preset multiple, the light measuring module is connected to the light emission port of the optical path module and is used to detect the light spot amplified to the preset multiple to obtain the amplified light emission parameters after the light spot is amplified, the amplified light emission parameters include a zero point position and a swing width, and the processing unit is used to calculate the current light emission parameters of the light on the welding gun according to the amplified light emission parameters;

[0026] Performing an initial adjustment on the welding gun, and then obtaining current parameter information of the welding gun after the initial adjustment, wherein the current parameter information includes current light emission parameters and current state parameter information, and comparing the current parameter information with the preset parameter information to determine whether it is qualified;

[0027] The test information of welding guns that pass the test is uploaded to the background, and an information code for query and traceability is generated. For welding guns that fail the test, a prompt is given to return them for repair.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The laser welding torch test system and test method of the present invention, through the light output test module of the test device, the light output test module can provide light simulating the laser, and the simulated light can be amplified by the optical path module to obtain a larger light spot, and then the amplified light spot can be detected by the photometric module, so that the actual welding torch light output parameters can be calculated according to the light output parameters of the amplified light spot and corresponding adjustments or judgments can be made, thereby achieving more accurate testing of the light path, effectively reducing errors, and improving work efficiency. Moreover, through such a scheme, automated testing of laser handheld welding torches and higher-precision light path testing can be achieved, eliminating manual detection, improving test efficiency, reducing production costs, and facilitating intelligent record management. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural block diagram of a laser welding gun testing system;

[0031] Figure 2 It is an enlarged schematic diagram of an optical path module of a laser welding gun testing system;

[0032] Figure 3 A circuit diagram of a light emitting circuit of a laser welding gun testing system;

[0033] Figure 4 A circuit diagram of a light measuring module of a laser welding gun testing system;

[0034] Figure 5 The figure is a flowchart of a laser welding gun testing method. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0036] Please refer to Figure 1 As shown, a laser welding gun testing system according to an embodiment of the present application includes a testing device and a control module.

[0037] Among them, the testing device includes a light output test module, which includes a light emitting module, an optical path module, a photometric module and a processing unit. The light emitting module is used to pass laser into the welding gun, the optical path module is connected to the light output port of the welding gun and is used to amplify the light incident into the optical path module to a preset multiple, the photometric module is connected to the light output port of the optical path module and is used to detect the light spot amplified to a preset multiple to obtain the amplified light output parameters after the light spot is amplified, the amplified light output parameters include a zero point position and a swing width, and the processing unit is used to calculate the current light output parameters of the light on the welding gun based on the amplified light output parameters.

[0038] The light output test module is used to detect the light output of the welding gun and obtain the light output parameters. It provides simulated light for testing through the light emitting module, such as red light. The simulated light is consistent with the light output characteristics of the laser on the welding gun, so testing can be performed through such simulated light; the optical path module is used to amplify the incident simulated light and amplify it into a light spot of a preset multiple. The amplified parameter data can be obtained by amplifying the light and then detecting it, while the photometric module is used to detect the amplified light spot and obtain the amplified light output parameters including the zero point position and the swing width; after obtaining the amplified light output parameters, the current light output parameters of the light output light on the welding gun can be calculated by inverse calculation through the processing unit, and then more accurate error data can be obtained. This testing method is more precise and efficient.

[0039] The control module is connected to the test module and is used to compare the parameter information including the current light emission parameters measured by the test device with the preset parameter information to determine whether the parameters are qualified. The control module is mainly used to compare the measured current parameter information with the preset parameter information. By comparing, it can be determined whether the qualified factory requirements are met. The parameter information includes the current light emission parameters, and of course, other information can also be included for comparison to determine whether multiple parameters meet the factory requirements, without limitation.

[0040] Through the above technical scheme, the light output test module of the testing device can provide light simulating laser, and can obtain a larger light spot by amplifying the simulated light through the optical path module, and then the position of the amplified light spot can be detected through the photometric module, so that the actual welding gun light output parameters can be calculated according to the light output parameters of the amplified light spot and corresponding adjustments or judgments can be made, thereby realizing more accurate testing of the optical path, effectively reducing errors, and improving work efficiency.

[0041] In one embodiment, the optical path module includes a light guide column and a light shielding layer located outside the light guide column, wherein the light guide column is made of a light guiding material and has an extended length for amplifying the laser to a preset multiple.

[0042] In this way, by extending the light guide column, the light incident therein can be extended and magnified by multiples, and different or required magnification multiples can be set according to different lengths, so as to obtain the light spot after the light is amplified, and on this basis, detection can be performed to obtain more accurate parameter data; and the light shielding layer located outside the light guide column is used to shield the external light source to prevent the external light source from interfering with the simulated laser light, so as to provide the accuracy of the test. Specifically, the light guide column can be made of quartz crystal, and the light shielding layer can be made of black material as a component to shield the external light source, so that the simulated light output by the welding gun can be introduced losslessly, and the actual position of the light spot can be guided to the light measuring module through the extension and amplification of the optical path.

[0043] It can be understood that the principle of simulating light passing through the light guide column is that the original light output position of the welding gun is at the exit position of the welding gun nozzle, and the welding position is in contact with it, and by extending and enlarging the light path, it can be enlarged to the target magnification S. Figure 2 As shown, the optical path magnification area can be seen as a right triangle formed with the zero-point optical path. According to the principle of similar right triangles, the original optical path height is H1, and the optical path height after extension is H, and the optical path magnification factor S = H / H1. The magnified light spot can obtain relevant parameter data through the photometric optical path through the way of light sensing to calculate the light parameters.

[0044] In a preferred embodiment of the light-emitting module, the light-emitting module includes a light-emitting circuit. The circuit of the invention can be directly driven by a diode with a selected wavelength and a current-limiting resistor in series. Figure 3 As shown, this can emit simulated light of the required wavelength.

[0045] In the specific implementation process, the light-emitting circuit and the photometric module need to ensure that the central wavelength is consistent. The light is emitted by a 940nm wavelength light-emitting diode, which is focused into a 14um light spot through a fiber optic buncher and transmitted to the welding gun outlet through the optical fiber of the welding gun itself.

[0046] In a preferred embodiment of the light measuring module, Figure 4 As shown, the light measuring module includes a test circuit board, and the test circuit board includes a plurality of photosensitive diodes arranged in parallel to cover a light spot magnified to a preset multiple, and outputs a first signal to the processing unit when the photosensitive diode is illuminated, and outputs a second signal to the processing unit when the photosensitive diode is not illuminated, and the processing unit obtains the amplified light output parameters according to the first signal and the second signal of the photosensitive diode on the test circuit board and calculates the current light output parameters based on the amplified light output parameters.

[0047] The test circuit board forms an optical path receiving circuit by arranging multiple photosensitive diodes in parallel to cover the light spot magnified to a preset multiple, and uses photosensitive diodes for receiving. The receiving center wavelength of the photosensitive diodes is consistent with that of the light emitting diodes.

[0048] Specifically, the entire photoelectric measurement circuit is composed of multiple photosensitive diodes, which are arranged in parallel, with a spacing of 1mm between adjacent diodes. Each photosensitive diode is numbered in a processing unit such as an MCU, and a position information to the center point is mapped. The MUC collects the state of the photosensitive diode. When there is light, the diode is turned on and outputs a low-level signal. When there is no light, it outputs a high-level signal. The MCU detects the level change of each diode, determines the current light position through a mapping table, and determines the distance L from this point to the zero point position. Then, the position L1 after the theoretical light output is amplified is queried, thereby calculating the light error E=(L-L1) / L1. The relationship between the photosensitive diode position and the photometric distance is shown in Table 1.

[0049]

[0050] In order to enable batch testing of multiple workstations, further, the light guide column is provided with multiple, the light board test module also includes multiple test interfaces corresponding to each light guide column and used for supplying light to the welding gun, and the photodiode on the test circuit board covers the light spot emitted by each light guide column at the same time.

[0051] In this way, through multiple test interfaces and multiple photodiodes of the photometric circuit board that can cover the light spot amplified by each light guide column, multiple welding guns can be tested at the same time, which improves work efficiency and is more convenient.

[0052] Furthermore, in order to be able to detect the fixing and installation status of the welding gun, the testing device also includes a fixture for installing the welding gun to connect with the light output test module, and the fixture is provided with a first sensor for detecting whether the welding gun is installed in place, and the first sensor is connected to the control module.

[0053] In this way, the clamp can clamp and fix the welding gun, and the clamping status can be detected through the first sensor. The first sensor sends different signals in different clamping states or only sends signals after clamping into place. The control module can detect whether the welding gun is clamped in place, which is more convenient and practical.

[0054] In some embodiments, the parameter information may also include state parameter information; the laser welding torch test system also includes an acquisition module, which is used to collect state parameter information under the operation state of the welding torch, and the state parameter information includes one or more of the welding torch protection mirror temperature, focusing mirror temperature, welding torch protection mirror plug-in status, focusing mirror plug-in status, safety interlock information, motor operation information, light output button status information, and welding torch whole machine power consumption information.

[0055] The acquisition module can be used to obtain status parameter information of the welding gun except for the light emission parameters, and compare it with the preset status parameter information to obtain more comprehensive welding gun status parameter data, and then it can be more comprehensively and accurately judged whether the welding gun meets the qualified requirements, so as to choose whether to leave the factory based on the test results.

[0056] In a specific implementation process, for acquiring the state parameter information of the welding gun during operation, the acquisition module may acquire the state parameter information by using a sensor corresponding to each parameter information, or by using an existing circuit with a state acquisition function, without limitation.

[0057] In an embodiment of the present application, the control module includes a processing and computing unit and a communication unit connected to the processing and computing unit, the processing and computing unit includes an AI edge computing chip, and the AI ​​edge computing chip is connected to the acquisition module through the communication unit.

[0058] The AI ​​edge computing chip can use Rockchip RK3588 domestically produced industrial-grade AI edge computing chip. Such a computing chip can better test and obtain the obtained parameter information and compare it with the preset parameters, and then obtain more accurate comparison results to determine whether the various functions of the welding gun meet the factory requirements. The communication unit is used to interact with the welding gun and obtain various status information of the welding gun. Specifically, the communication unit can interact with the welding gun through the RS485 communication module to obtain various status information of the welding gun.

[0059] During the specific implementation, a nine-pin female connector and a nine-pin male connector may be provided for transfer.

[0060] In order to facilitate operation, remote viewing and management, the control module also includes a liquid crystal display unit and a network interface connected to the AI ​​edge computing chip. In this way, convenient display and related control can be performed through a liquid crystal display unit such as a liquid crystal touch screen, and information can be viewed at any time in the background or on a mobile phone APP through a network interface such as 4G, which is convenient for management.

[0061] In the specific implementation process, in order to facilitate data tracking and tracing, the control module also includes an identification unit and a storage unit respectively connected to the processing and computing unit, the identification unit is used to identify the preset coding information of the welding gun and obtain the equipment information of the welding gun, and the storage unit is used to store the welding gun test information. The welding gun is pre-burned with a program, and each welding gun generates a unique and multi-bit address code according to certain rules, such as a 12-bit address code. Then, when performing a functional test, the address code of the welding gun is read by the identification unit, and the test results are recorded by the storage unit after the welding gun is tested. After the product is qualified, the current welding gun information is uploaded to the day after tomorrow, and a unique information code for query and tracing is automatically generated to facilitate subsequent query and tracing.

[0062] Please refer to Figure 5 As shown, the embodiment of the application also provides a laser welding gun testing method, comprising the following steps:

[0063] Step S1: Reading the preset coding information of the welding gun to be tested to obtain the equipment information of the welding gun.

[0064] In this step, the equipment information of the welding gun can be obtained by reading the coding information of the welding gun, and the equipment information may include the production model, serial number, production date and other information of the welding gun.

[0065] Step S2: obtaining status parameter information of the welding gun to be tested, wherein the status parameter information includes one or more of welding gun protection mirror temperature, focusing mirror temperature, welding gun protection mirror plug-in status, focusing mirror plug-in status, safety interlock information, motor operation information, light output button status information, and welding gun whole machine power consumption information.

[0066] In this step, by obtaining various status information of the welding gun, the current status test information can be adjusted or compared, which can help determine whether it meets the factory requirements.

[0067] Step S3: detecting the current light emission parameters of the welding gun to be tested by means of a testing device; wherein the testing device comprises a light emission testing module, the light emission testing module comprises a light emitting module, an optical path module, a light measuring module and a processing unit, the light emitting module is used to introduce laser into the welding gun, the optical path module is connected to the light emission port of the welding gun and is used to amplify the light incident into the optical path module to a preset multiple, the light measuring module is connected to the light emission port of the optical path module and is used to detect the light spot amplified to a preset multiple to obtain the amplified light emission parameters after the light spot is amplified, the amplified light emission parameters include a zero point position and a swing width, and the processing unit is used to calculate the current light emission parameters of the light on the welding gun according to the amplified light emission parameters.

[0068] In this step, the testing device can be tested by simulating light such as red light, and amplifying the light path through the optical path module, and amplifying the simulated light through the optical path module to obtain a larger light spot, and then the position of the amplified light spot can be detected through the photometric module, so that the actual welding gun light parameters can be calculated according to the light parameters of the amplified light spot and corresponding adjustments or judgments can be made, thereby achieving more accurate testing of the optical path, effectively reducing errors, and improving work efficiency.

[0069] Step S4: Perform an initial adjustment on the welding gun, and then obtain current parameter information of the welding gun after the initial adjustment, wherein the current parameter information includes current light output parameters and current state parameter information, and compare the current parameter information with the preset parameter information to determine whether it is qualified.

[0070] In this step, after obtaining the status information for the first time, the welding gun is adjusted for the first time. The first adjustment can be done by plugging and unplugging the protective lens and the focusing lens through the mechanical arm, and by operating the buttons and the wire feeding knob through the mechanical arm, so that the first adjustment can be achieved, so that the parameters that can be adjusted by the welding gun are adjusted to the correct state. Since the various state parameters of unqualified products cannot be adjusted to the correct state, it is necessary to obtain again to determine whether there are state parameters that have not been successfully adjusted. After obtaining the current state parameter information again, the current state parameter information is compared with the current light output parameters and the preset parameter information, so as to determine whether it is qualified. This judgment method is more accurate. In the first adjustment, for the light output parameters, the red light zero point and the swing width can be adjusted through the control module, so that the red light zero point output by the welding gun is in the middle of the welding gun nozzle, and the swing width meets the design requirements of 5mm and the accuracy is 0.1mm. Specifically, after the welding gun is powered on, the red light has an initial position. Through photosensitive detection, it is determined whether the existing red light origin is in the middle. If it is not in the middle, the corresponding position adjustment is made until the red light zero point is in the middle. Then the control module starts to control the swing position of the welding gun galvanometer motor and adjusts it to the required position. The initial swing width is detected and compared with 5mm after photosensitive detection. If it is larger than 5mm, the swing is reduced, and if it is smaller than 5mm, the swing is widened until the swing width reaches the required 5mm.

[0071] Step S5: The test information of the welding guns that have passed the test is uploaded to the background, and an information code for query and traceability is generated. For welding guns that have failed the test, a repair prompt is given.

[0072] In this step, after the test information of the welding guns that have passed the test is uploaded to the background, it can be queried and traced through the information code, which is convenient for querying the production progress and status through the background host computer or APP, and is more conducive to management and traceability. For welding guns that fail the test, it is prompted that they need to be repaired.

[0073] Through the above-mentioned testing method, such a solution can realize the automated testing of the laser handheld welding gun and the optical path testing with higher precision, eliminating the need for manual inspection, improving the testing efficiency, reducing the production cost, and facilitating the intelligent record management.

[0074] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A laser welding gun testing system, characterized in that: include: A testing device, comprising a light emission testing module, wherein the light emission testing module comprises a light emitting module, an optical path module, a photometric module and a processing unit, wherein the light emitting module is used to pass a laser into a welding gun, the optical path module is connected to a light outlet of the welding gun and is used to amplify the light incident into the optical path module to a preset multiple, the photometric module is connected to the light outlet of the optical path module and is used to detect a light spot amplified to a preset multiple to obtain amplified light emission parameters after the light spot is amplified, wherein the amplified light emission parameters comprise a zero point position and a swing width, and the processing unit is used to calculate a current light emission parameter of the light on the welding gun according to the amplified light emission parameters; as well as The control module is connected to the test module and is used to compare the parameter information including the current light output parameters measured by the test device with the preset parameter information to determine whether the parameters are qualified.

2. A laser welding gun testing system as claimed in claim 1, characterized in that: The optical path module comprises a light guide column and a light shielding layer located outside the light guide column. The light guide column is made of a light guide material and has an extended length for amplifying the laser to a preset multiple.

3. A laser welding gun testing system as claimed in claim 2, characterized in that: The light metering module includes a test circuit board, which includes a plurality of photosensitive diodes arranged in parallel to cover a light spot magnified to a preset multiple, and outputs a first signal to the processing unit when the photosensitive diode is illuminated, and outputs a second signal to the processing unit when the photosensitive diode is not illuminated. The processing unit obtains the amplified light output parameters according to the first signal and the second signal of the photosensitive diode on the test circuit board, and calculates the current light output parameters based on the amplified light output parameters.

4. A laser welding gun testing system as claimed in claim 3, characterized in that: There are multiple light guides, and the light board test module also includes multiple test interfaces corresponding to each light guide and used for the welding gun to emit light. The photodiode on the test circuit board covers the light spot emitted by each light guide at the same time.

5. A laser welding gun testing system as claimed in claim 1, characterized in that: The parameter information also includes state parameter information; The laser welding gun test system also includes an acquisition module, which is used to collect status parameter information under the operation state of the welding gun, and the status parameter information includes one or more of the welding gun protection mirror temperature, focusing mirror temperature, welding gun protection mirror plug-in status, focusing mirror plug-in status, safety interlock information, motor operation information, light output button status information, and welding gun whole machine power consumption information.

6. A laser welding gun testing system as claimed in claim 5, characterized in that: The control module includes a processing and computing unit and a communication unit connected to the processing and computing unit. The processing and computing unit includes an AI edge computing chip, and the AI ​​edge computing chip is connected to the acquisition module through the communication unit.

7. A laser welding gun testing system as claimed in claim 6, characterized in that: The control module also includes a liquid crystal display unit and a network interface connected to the AI ​​edge computing chip.

8. A laser welding gun testing system as claimed in claim 6, characterized in that: The control module also includes an identification unit and a storage unit respectively connected to the processing and computing unit, the identification unit is used to identify the preset coding information of the welding gun and obtain the equipment information of the welding gun, and the storage unit is used to store the welding gun test information.

9. A laser welding gun testing system as claimed in claim 1, characterized in that: The testing device also includes a fixture for installing a welding gun to connect with the light emission test module. The fixture is provided with a first sensor for detecting whether the welding gun is installed in place. The first sensor is connected to the control module.

10. A laser welding gun testing method, characterized in that: The following steps are involved: Read the preset coding information of the welding gun to be tested to obtain the equipment information of the welding gun; Obtaining state parameter information of the welding gun to be tested, wherein the state parameter information includes one or more of welding gun protection lens temperature, focusing lens temperature, welding gun protection lens plug-in status, focusing lens plug-in status, safety interlock information, motor operation information, light output button status information, and welding gun whole machine power consumption information; The current light emission parameters of the welding gun to be tested are detected by a testing device; wherein the testing device comprises a light emission testing module, the light emission testing module comprises a light emitting module, an optical path module, a light measuring module and a processing unit, the light emitting module is used to pass laser into the welding gun, the optical path module is connected to the light emission port of the welding gun and is used to amplify the light incident into the optical path module to a preset multiple, the light measuring module is connected to the light emission port of the optical path module and is used to detect the light spot amplified to the preset multiple to obtain the amplified light emission parameters after the light spot is amplified, the amplified light emission parameters include a zero point position and a swing width, and the processing unit is used to calculate the current light emission parameters of the light on the welding gun according to the amplified light emission parameters; Performing an initial adjustment on the welding gun, and then obtaining current parameter information of the welding gun after the initial adjustment, wherein the current parameter information includes current light emission parameters and current state parameter information, and comparing the current parameter information with the preset parameter information to determine whether it is qualified; The test information of welding guns that pass the test is uploaded to the background, and an information code for query and traceability is generated. For welding guns that fail the test, a prompt is given to return them for repair.

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