Welding device for aluminum profile

Abstract

The invention discloses a welding device for aluminum profiles, and relates to the field of aluminum profile machining, the welding device comprises a welding gun, a main rack and a welding rod, and the welding gun is fixed on the main rack; the welding rod conveying mechanism is used for intermittently conveying welding rods; the grinding mechanism comprises a first grinding wheel, a second grinding wheel and a grinding belt, the two sides of the first grinding wheel are rotationally connected with sleeves correspondingly, the sleeves are in sliding connection with the main rack, the second grinding wheel is rotationally connected with the main rack, and the first grinding wheel and the second grinding wheel are sleeved with the two ends of the grinding belt correspondingly; the output end of the adjusting part is fixedly connected with the sleeve; the welding rod and the polishing mechanism are installed on the two sides of the welding gun correspondingly, in the welding process, the polishing mechanism polishes the next welding point in real time, the welding rod intermittently makes contact with the welding gun to weld the current welding point, the problem that polishing needs to be conducted in advance is solved, and the overall welding efficiency and welding quality are improved.

Description

Technical Field

[0001] The invention relates to the field of aluminum profile processing, and in particular to a welding device for aluminum profiles. Background Art

[0002] Aluminum profiles are made of aluminum as the main material. They are mainly used for the construction of some non-standard equipment and door and window frames. For example, when used for the construction of non-standard equipment, aluminum profiles need to be processed secondary according to the actual needs of non-standard equipment, such as cutting, punching or welding.

[0003] For example, a synchronous rotating welding device for aluminum profile processing disclosed in publication number CN117260152A includes a workbench, a square placement slot is arranged at the center of the workbench table, two symmetrical front and rear fixing clamps are arranged at the placement slot, each fixing clamp includes a symmetrically arranged upper half and lower half, the lower half is fixed inside the placement slot, and the upper half can be locked for vertical lifting; a fixed mold unit is rotatably connected inside the upper half and the lower half of the fixing clamp, a fixed sub-slot is arranged inside each fixed mold unit, and two fixed sub-slots form a complete fixed slot, and the fixed slot has the same shape as the multi-variable aluminum profile; a welding gun is arranged on the workbench table on one side of the placement slot, and a positioning plate for positioning the welding gun is arranged on one side of the welding gun;

[0004] This patent fixes the aluminum profile by fixing the mold unit and welding the aluminum profile with a welding gun. However, due to the special material of the aluminum profile, the surface of the aluminum profile is easily oxidized to form an oxide layer, which will affect the welding quality of the aluminum profile. Therefore, the aluminum profile is currently polished before welding, but the current welding equipment cannot polish the welding point in real time during the welding process. If polishing is performed in advance and then welding, the timeliness must be controlled, otherwise it will re-oxidize to form an oxide layer, affecting the welding quality. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a welding device for aluminum profiles, so as to achieve real-time grinding of the next welding point during the welding process and improve the welding quality.

[0006] In order to achieve the above technical purpose, the present invention provides a welding device for aluminum profiles:

[0007] It includes a welding gun, a main frame and a welding rod, wherein the welding gun is fixed on the main frame, and further includes:

[0008] A welding rod conveying mechanism, located above the welding gun and fixed to the main frame, is used for intermittently conveying welding rods;

[0009] A grinding mechanism is installed below the main frame, the grinding mechanism includes a first grinding wheel, a second grinding wheel and a grinding belt, both sides of the first grinding wheel are rotatably connected with sleeves, the sleeves are slidably connected to the main frame, the second grinding wheel is rotatably connected to the main frame, and both ends of the grinding belt are respectively sleeved on the first grinding wheel and the second grinding wheel;

[0010] The adjusting member, the output end of which is fixedly connected with the sleeve;

[0011] The driving component has an output end which is respectively linked with the welding rod conveying mechanism and the second grinding wheel, and is used to drive the welding rod conveying mechanism and the second grinding wheel respectively.

[0012] Preferably, a control unit is mounted on the main frame, and the control unit includes:

[0013] The first acquisition module is used to acquire i groups of welding point images in chronological order, where i is an integer greater than 1;

[0014] A second acquisition module is used to acquire the real-time pressure value applied to the welding point by the grinding mechanism;

[0015] An image processing module calculates and obtains a grinding difference value based on i groups of welding point images;

[0016] A grinding recognition module is used to input the real-time pressure value and the grinding difference value as grinding feature data into the trained grinding recognition model, and output the grinding pressure value;

[0017] The control module controls the regulating member to adjust the grinding pressure of the grinding mechanism based on the grinding pressure value.

[0018] Preferably, the method for the image processing module to calculate the polishing difference value includes:

[0019] Step 1: Obtain n grayscale values ​​of n pixels in the solder joint image, establish an analysis set for the n grayscale values, and calculate the average value of the analysis set, where n is an integer greater than 1;

[0020] Step 2: Repeat step 1 in chronological order to obtain m average values, where m is an integer greater than 1;

[0021] Step 3: Calculate the absolute value of the difference between m and m-1 as the polishing difference value.

[0022] Preferably, the method for the polishing recognition module to train the polishing recognition model is:

[0023] Pre-collecting g groups of historical grinding characteristic data and grinding pressure values ​​corresponding to the historical grinding characteristic data, where g is an integer greater than 1;

[0024] The historical polishing feature data and the polishing pressure values ​​corresponding to the historical polishing feature data are taken as a sample set, and the sample set is divided into a training set and a test set. The historical polishing feature data in the training set is taken as the input of the polishing recognition model, and the polishing pressure values ​​in the training set are taken as the output of the polishing recognition model. The polishing recognition model is trained to output a polishing recognition model that meets the preset accuracy. The polishing recognition model is a naive Bayes model or a support vector machine model.

[0025] Preferably, the welding rod conveying mechanism comprises:

[0026] There are at least two conveying wheels, which are respectively distributed on both sides of the welding rod and are both rotatably connected to the main frame;

[0027] The first transmission bevel gear is rotatably connected to the main frame;

[0028] The driven sprocket is coaxially connected with one of the conveying wheels and the main frame for rotation; the transmission chain has two ends respectively sleeved on the first transmission bevel gear and the driven sprocket.

[0029] Preferably, the drive assembly comprises:

[0030] The motor is fixed on the main frame;

[0031] Active bevel gear, fixedly connected to the output end of the motor;

[0032] The second transmission bevel gear is meshed with the active bevel gear, and the second transmission bevel gear is coaxially fixedly connected with the axis of the second grinding wheel.

[0033] Preferably, the driving assembly further comprises a synchronizing member, the active bevel gear is linked with the first transmission bevel gear through the synchronizing member, and the synchronizing member comprises:

[0034] A synchronous shaft, rotationally connected to the main frame;

[0035] A synchronous bevel gear is fixed to one end of the synchronous shaft, and the synchronous bevel gear is meshed with the active bevel gear;

[0036] The intermittent bevel gear is fixed to the other end of the synchronous shaft, and the intermittent bevel gear is intermittently meshed with the first transmission bevel gear.

[0037] Preferably, a driving sprocket is coaxially and fixedly connected to the axis of the first transmission bevel gear, and one end of the transmission chain away from the driven sprocket is sleeved on the driving sprocket.

[0038] Preferably, the grinding mechanism further comprises a tensioning assembly, and the tensioning assembly comprises:

[0039] A pulling frame, slidably connected to the main frame;

[0040] A belt holding roller is rotatably connected to the pulling frame, and the grinding belt abuts against the outer surface of the belt holding roller;

[0041] The spring has two ends respectively against the main frame and the pulling frame, and is used to apply elastic force to the pulling frame.

[0042] Preferably, the welding rod conveying mechanism further comprises a guide plate, the guide plate is fixed on the main frame, and the welding rod is slidably connected to the guide plate.

[0043] It can be seen from the above technical solutions that the present application has the following beneficial effects:

[0044] 1: By installing welding rods and grinding mechanisms on both sides of the welding gun, the grinding mechanism grinds the next welding point in real time during the welding process, while the welding rod intermittently contacts the welding gun to weld the current welding point, thus solving the problem of needing to grind in advance and improving the overall welding efficiency and welding quality.

[0045] 2: By acquiring the weld spot image in real time and comparing and analyzing the weld spot images on the previous and next time lines, the grinding intensity of the next weld spot can be adjusted in real time according to the analysis results to avoid over-grinding or under-grinding and further improve the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0047] Figure 1 A schematic diagram of the overall structure of a welding device for aluminum profiles provided by the present invention;

[0048] Figure 2 A front view structural schematic diagram of a welding device for aluminum profiles provided by the present invention;

[0049] Figure 3 A schematic cross-sectional view of a welding device for aluminum profiles provided by the present invention;

[0050] Figure 4 A schematic diagram of the partial structure of a welding device for aluminum profiles provided by the present invention;

[0051] Figure 5 A schematic diagram of the structure of a synchronous component of a welding device for aluminum profiles provided by the present invention;

[0052] Figure 6 A schematic diagram of the structure of a control unit of an aluminum profile welding device provided by the present invention.

[0053] Description of the drawings: 1. welding gun; 2. welding rod conveying mechanism; 21. conveying wheel; 22. guide plate; 23. first transmission bevel gear; 231. driving sprocket; 24. driven sprocket; 25. transmission chain; 3. grinding mechanism; 31. first grinding wheel; 311. second grinding wheel; 312. sleeve; 32. grinding belt; 33. tensioning assembly; 331. pulling frame; 332. belt pressing roller; 333. spring; 4. adjusting member; 5. motor; 51. driving bevel gear; 52. second transmission bevel gear; 53. synchronous member; 531. synchronous shaft; 532. synchronous bevel gear; 533. intermittent bevel gear; 6. main frame; 7. welding rod. DETAILED DESCRIPTION

[0054] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and use. It should be understood that in all of these figures, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present disclosure. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0055] Embodiment 1

[0056] See also Figure 1 As shown, a welding device for aluminum profiles includes a welding gun 1, a welding rod conveying mechanism 2, a grinding mechanism 3, a main frame 6 and a welding rod 7. The welding rod conveying mechanism 2 and the grinding mechanism 3 are respectively distributed on both sides of the welding gun 1. The welding gun 1, the welding rod conveying mechanism 2 and the grinding mechanism 3 are all fixed on the main frame 6. The welding rod conveying mechanism 2 is used to intermittently convey the welding rod 7 to the output part of the welding gun 1, and the welding gun 1 is used to generate heat to melt the welding rod 7 for welding. The grinding mechanism 3 is used to grind the next welding point. Generally, the weld is only 1 mm. The grinding mechanism of this embodiment has a width of 2 cm and can better grind the area to be welded. In addition, the welding gun 1 and the main frame 6 can be used in conjunction with a multi-axis manipulator, a slide, a linear module, etc. to form an automatic welding robot to solve the problem of grinding area and grind comprehensively.

[0057] Exemplarily, the welding direction of this embodiment during welding is to start from the grinding mechanism 3 as the starting point and move along the welding path, that is, the grinding mechanism 3 always grinds the point to be welded first, which is collectively referred to as the next welding point below, and then the welding gun 1 moves to the next welding point, and the welding rod 7 intermittently contacts the output part of the welding gun 1, so that the welding rod 7 melts and welds the next welding point.

[0058] The purpose is to weld while grinding, without having to grind all welding points first and then weld. This avoids the situation where if the grinding path is long, all welding points must be polished in advance and then welded, which will take too long and cause the aluminum profile to re-oxidize and affect the grinding quality.

[0059] For details, see Figure 2 As shown, the welding rod conveying mechanism 2 includes a conveying wheel 21, a guide plate 22, a first transmission bevel gear 23 and a driven sprocket 24. There are at least two conveying wheels 21, and the two conveying wheels 21 are respectively distributed on both sides of the welding rod 7, and the two conveying wheels 21 are rotatably connected to the main frame 6. By rotating the conveying wheel 21, the welding rod 7 can be driven to move by friction; the first transmission bevel gear 23 is rotatably connected to the main frame 6; the driven sprocket 24 is coaxially rotatably connected with one of the conveying wheels 21 and the main frame 6, and the two ends of the transmission chain 25 are respectively sleeved on the first transmission bevel gear 23 and the driven sprocket 24, the guide plate 22 is fixed on the main frame 6, and the welding rod 7 is slidably connected to the guide plate 22, and the guide plate 22 is used to hold the welding rod 7; it should be noted that this embodiment includes but is not limited to the use of the guide plate 22. If there are four conveying wheels 21, the four conveying wheels 21 are relatively distributed in pairs, and the guide plate 22 can also be replaced to achieve the function of holding the welding rod 7.

[0060] Exemplarily, by the rotation of the first transmission bevel gear 23 , the first transmission bevel gear 23 can drive the driven sprocket 24 to rotate through the transmission chain 25 , so that the driven sprocket 24 drives one of the conveying wheels 21 to rotate.

[0061] For more details, see Figure 3 and Figure 4 As shown, an adjusting member 4 is fixed on the main frame 6, and the grinding mechanism 3 includes a first grinding wheel 31, a second grinding wheel 311, a grinding belt 32 and a tensioning assembly 33. The first grinding wheel 31 is rotatably connected to sleeves 312 on both sides, and the sleeve 312 is slidably connected to the main frame 6, and the output end of the adjusting member 4 is fixedly connected to the sleeve 312, the second grinding wheel 311 is rotatably connected to the main frame 6, and the two ends of the grinding belt 32 are respectively sleeved on the first grinding wheel 31 and the second grinding wheel 311; the tensioning assembly 33 is used to adjust the tension of the grinding belt 32; in this embodiment, the grinding belt 32 can be replaced, which is specifically determined according to the wear situation.

[0062] Illustratively, by adjusting the sliding position of the sleeve 312 on the main frame 6 through the adjusting member 4, the position of the first grinding wheel 31 can be adjusted, thereby changing the distance between the grinding belt 32 and the grinding point, thereby changing the grinding pressure. For example, the closer the distance, the greater the grinding pressure, and vice versa. When adjusting the position of the first grinding wheel 31, the connection tension between the grinding belt 32 and the first grinding wheel 31 and the second grinding wheel 311 will change. By adjusting the tension of the grinding belt 32 through the tensioning assembly 33, the grinding belt 32 can be kept tensioned at all times to prevent it from falling off the first grinding wheel 31 and the second grinding wheel 311.

[0063] It is worth mentioning that the adjusting part 4 of this embodiment can adopt a device that can drive an object to move linearly, such as a cylinder or an electric push rod, without specific limitation. The slight dust generated by grinding the oxide layer will be blown away by the argon gas supplied by the argon arc welding gun 1, and the argon gas can protect the grinding position from re-oxidation.

[0064] See also Figure 3 and Figure 4 As shown, the tensioning assembly 33 includes a pulling frame 331, a belt holding roller 332 and a spring 333. The pulling frame 331 is slidably connected to the main frame 6, the belt holding roller 332 is rotatably connected to the pulling frame 331, and the grinding belt 32 is against the outer surface of the belt holding roller 332. The two ends of the spring 333 are respectively against the main frame 6 and the pulling frame 331. The spring 333 is used to apply elastic force to the pulling frame 331. Exemplarily, the spring 333 provides elastic force to the pulling frame 331, so that the pulling frame 331 always presses the grinding belt 32 with the belt holding roller 332, so that the grinding belt 32 can be kept tensioned.

[0065] For further information, see Figure 4 and Figure 5 As shown, the main frame 6 is fixed with a driving assembly, and the driving assembly includes a motor 5. The output ends of the motor 5 are respectively linked with the welding rod conveying mechanism 2 and the grinding mechanism 3, and the motor 5 is used to drive the welding rod conveying mechanism 2 and the grinding mechanism 3 respectively; the output end of the motor 5 is fixed with an active bevel gear 51, and the active bevel gear 51 is meshed with a second transmission bevel gear 52, and the second transmission bevel gear 52 is coaxially fixedly connected with the axis of the second grinding wheel 311; illustratively, the motor 5 drives the second transmission bevel gear 52 to rotate through the active bevel gear 51, and the second transmission bevel gear 52 can drive the second grinding wheel 311 to rotate, and the second grinding wheel 311 can drive the grinding belt 32 to roll, thereby grinding the aluminum profile.

[0066] The active bevel gear 51 is linked with the first transmission bevel gear 23 through a synchronous member 53. The synchronous member 53 includes a synchronous shaft 531. The two ends of the synchronous shaft 531 are respectively fixed with a synchronous bevel gear 532 and an intermittent bevel gear 533. The synchronous shaft 531 is rotatably connected to the main frame 6, and the synchronous bevel gear 532 is meshed with the active bevel gear 51, and the intermittent bevel gear 533 is intermittently meshed with the first transmission bevel gear 23; see Figure 5 As shown, the intermittent bevel gear 533, i.e., the surface tooth block, does not make a complete circle. The purpose is that the intermittent bevel gear 533 rotates one circle, and the first transmission bevel gear 23 only rotates less than one circle. In this way, it can ensure that the grinding mechanism 3 is always working, and the welding rod 7 can intermittently approach the welding gun 1.

[0067] More specifically, the first transmission bevel tooth 23 is coaxially fixedly connected to a driving sprocket 231 at its axis, and one end of the transmission chain 25 away from the driven sprocket 24 is sleeved on the driving sprocket 231. The intermittent bevel tooth 533 drives the first transmission bevel tooth 23 to rotate. The first transmission bevel tooth 23 can drive the transmission chain 25 to roll through the driving sprocket 231, thereby driving the driven sprocket 24 to rotate.

[0068] Embodiment 2

[0069] Based on the above embodiment, as shown in FIG6 , the main frame 6 is further equipped with a control unit, which is used to control the adjustment member 4. The control unit includes a first acquisition module, a second acquisition module, an image processing module, a grinding recognition module and a control module, wherein each module is connected via a wired and / or wireless network.

[0070] The first acquisition module is used to acquire i groups of welding point images in chronological order, where i is an integer greater than or equal to 1, that is, the welding point images on the welding path are acquired in chronological order. In this embodiment, the first acquisition module adopts a high-definition camera, and the shooting point coincides with the grinding point of the grinding mechanism 3. The specific installation position is not elaborated in detail here. It should be noted that, when the technicians in this field apply it in practice, the impact of the strong light generated by welding on the first acquisition module can be shielded in front of the lens, or the exposure can be reduced at the system level. The collected welding point images can be pre-processed for noise reduction, such as by cropping only the image of the welding point position. Image noise reduction is a known technology and is not elaborated in detail here.

[0071] The second acquisition module is used to collect the real-time pressure value applied to the weld by the grinding mechanism 3; the second acquisition module of this embodiment adopts a pressure sensor or a sensor with a pressure detection function. Taking the pressure sensor as an example, the pressure sensor is installed at the sliding connection between the sleeve 312 and the main frame 6 or at a position where the real-time pressure value applied to the weld by the grinding mechanism 3 can be indirectly measured. No specific limitation is made here. In this way, when the sleeve 312 moves, it can squeeze the pressure sensor, and the real-time pressure value applied to the weld by the grinding mechanism 3 can be indirectly measured.

[0072] The image processing module calculates and obtains the grinding difference value based on the i groups of welding point images. The method for the image processing module to calculate the grinding difference value includes:

[0073] Step 1: Obtain n grayscale values ​​of n pixels in the solder joint image, establish an analysis set for the n grayscale values, and calculate the average value of the analysis set;

[0074] Step 2: Repeat step 1 in chronological order to obtain m average values, where n and m are both integers greater than 1;

[0075] Step three, calculate the absolute value of the difference between m and m-1 as the polishing difference value. For example, if two average values ​​are measured in chronological order, which are 35 and 32 respectively, the difference between the first average value and the second average value is 35-32=3. The value of 3 can be used as a judgment parameter for the polishing effect. The specific judgment standard of the polishing difference value after polishing is determined by technical personnel in this field according to the specific situation and is not specifically limited here.

[0076] The grinding recognition module is used to input the real-time pressure value and the grinding difference value as grinding feature data into the trained grinding recognition model, and output the grinding pressure value. The method for training the grinding recognition model by the grinding recognition module is:

[0077] Under the experimental environment, g groups of historical polishing feature data and polishing pressure values ​​corresponding to the historical polishing feature data are collected in advance, where g is an integer greater than 1; multiple groups of the same historical polishing feature data are simulated under the experimental environment, and multiple groups of the same historical polishing feature data are polished with multiple groups of different polishing pressure values, and a group with the best polishing effect is selected by a technician in this field as the polishing pressure value corresponding to the historical polishing feature data; g groups of historical polishing feature data and polishing pressure values ​​corresponding to the historical polishing feature data can be obtained by conducting experiments on multiple groups of different historical polishing feature data;

[0078] The historical polishing feature data and the polishing pressure values ​​corresponding to the historical polishing feature data are taken as a sample set, and the sample set is divided into a training set and a test set. The historical polishing feature data in the training set is taken as the input of the polishing recognition model, and the polishing pressure values ​​in the training set are taken as the output of the polishing recognition model. The polishing recognition model is trained to output a polishing recognition model that meets the preset accuracy. It should be noted that the standard for meeting the preset accuracy is determined by technical personnel in this field according to actual conditions. The polishing recognition model is a naive Bayes model or a support vector machine model.

[0079] The control module controls the adjusting member 4 to adjust the grinding pressure of the grinding mechanism 3 based on the grinding pressure value, that is, by controlling the telescopic length of the adjusting member 4 and changing the position of the first grinding wheel 31, the grinding pressure of the grinding mechanism 3 can be changed; the control module of this embodiment can adopt a hardware device capable of logical control such as a PID controller or a PLC, which is not specifically limited here.

[0080] This embodiment analyzes the image data before and after the welding point is polished, and changes the polishing force in real time, so as to avoid over-polishing or under-polishing, avoid affecting the welding of the aluminum profile, and thus ensure the welding quality of the aluminum profile.

[0081] The exemplary implementation scheme of the present disclosure is described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure can be combined in various ways without exceeding the protection scope of the present disclosure, which is determined by the attached claims.

Claims

1. A welding device for aluminum profiles, comprising a welding gun (1), a main frame (6) and a welding rod (7), wherein the welding gun (1) is fixed on the main frame (6), and characterized in that: Also includes: A welding rod conveying mechanism (2), located above the welding gun (1) and fixed on the main frame (6), is used for intermittently conveying welding rods (7); A grinding mechanism (3) is installed below the main frame (6), the grinding mechanism (3) comprising a first grinding wheel (31), a second grinding wheel (311) and a grinding belt (32), the first grinding wheel (31) is rotatably connected to both sides with sleeves (312), the sleeves (312) are slidably connected to the main frame (6), the second grinding wheel (311) is rotatably connected to the main frame (6), and the two ends of the grinding belt (32) are respectively sleeved on the first grinding wheel (31) and the second grinding wheel (311); The adjusting member (4) has an output end fixedly connected to the sleeve (312); The drive assembly has an output end which is respectively linked to the welding rod conveying mechanism (2) and the second grinding wheel (311), and is used to drive the welding rod conveying mechanism (2) and the second grinding wheel (311).

2. The aluminum profile welding device according to claim 1, characterized in that: The main frame (6) is equipped with a control unit, which includes: The first acquisition module is used to acquire i groups of welding point images in chronological order, where i is an integer greater than 1; A second collection module, used for collecting the real-time pressure value applied by the grinding mechanism (3) to the welding point; An image processing module calculates and obtains a grinding difference value based on i groups of welding point images; A grinding recognition module is used to input the real-time pressure value and the grinding difference value as grinding feature data into the trained grinding recognition model, and output the grinding pressure value; A control module controls the regulating member (4) to adjust the grinding pressure of the grinding mechanism (3) based on the grinding pressure value.

3. The aluminum profile welding device according to claim 2, characterized in that: The method for calculating the grinding difference value by the image processing module includes: Step 1: Obtain n grayscale values ​​of n pixels in the solder joint image, establish an analysis set for the n grayscale values, and calculate the average value of the analysis set, where n is an integer greater than 1; Step 2: Repeat step 1 in chronological order to obtain m average values, where m is an integer greater than 1; Step 3: Calculate the absolute value of the difference between m and m-1 as the polishing difference value.

4. The aluminum profile welding device according to claim 2, characterized in that: The method for training the polishing recognition model by the polishing recognition module is: Pre-collecting g groups of historical grinding characteristic data and grinding pressure values ​​corresponding to the historical grinding characteristic data, where g is an integer greater than 1; The historical polishing feature data and the polishing pressure values ​​corresponding to the historical polishing feature data are taken as a sample set, and the sample set is divided into a training set and a test set. The historical polishing feature data in the training set is taken as the input of the polishing recognition model, and the polishing pressure values ​​in the training set are taken as the output of the polishing recognition model. The polishing recognition model is trained to output a polishing recognition model that meets the preset accuracy. The polishing recognition model is a naive Bayes model or a support vector machine model.

5. The aluminum profile welding device according to claim 1, characterized in that: The welding rod conveying mechanism (2) comprises: There are at least two conveying wheels (21), the two conveying wheels (21) are respectively distributed on both sides of the welding rod (7), and the two conveying wheels (21) are both rotatably connected to the main frame (6); A first transmission bevel gear (23) is rotatably connected to the main frame (6); The driven sprocket (24) is coaxially connected to one of the conveying wheels (21) and the main frame (6); the transmission chain (25) has two ends respectively sleeved on the first transmission bevel gear (23) and the driven sprocket (24).

6. The aluminum profile welding device according to claim 5, characterized in that: The drive components include: A motor (5) is fixed on a main frame (6); An active bevel gear (51) is fixedly connected to an output end of the motor (5); The second transmission bevel gear (52) is meshed with the active bevel gear (51), and the second transmission bevel gear (52) is coaxially fixedly connected to the axis of the second grinding wheel (311).

7. The aluminum profile welding device according to claim 6, characterized in that: The driving assembly further comprises a synchronizing member (53), the active bevel gear (51) is linked with the first transmission bevel gear (23) via the synchronizing member (53), and the synchronizing member (53) comprises: A synchronization shaft (531) is rotationally connected to the main frame (6); A synchronous bevel gear (532) is fixed to one end of the synchronous shaft (531), and the synchronous bevel gear (532) is meshed with the active bevel gear (51); The intermittent bevel gear (533) is fixed to the other end of the synchronous shaft (531), and the intermittent bevel gear (533) intermittently meshes with the first transmission bevel gear (23).

8. The aluminum profile welding device according to claim 5, characterized in that: A driving sprocket (231) is coaxially and fixedly connected to the axis of the first transmission bevel gear (23), and one end of the transmission chain (25) away from the driven sprocket (24) is sleeved on the driving sprocket (231).

9. The aluminum profile welding device according to claim 1, characterized in that: The grinding mechanism (3) further comprises a tensioning assembly (33), wherein the tensioning assembly (33) comprises: A pulling frame (331) is slidably connected to the main frame (6); A belt pressing roller (332) is rotatably connected to the pulling frame (331), and the grinding belt (32) abuts against the outer surface of the belt pressing roller (332); The spring (333) has two ends respectively abutting against the main frame (6) and the pulling frame (331), and is used to apply elastic force to the pulling frame (331).

10. The aluminum profile welding device according to claim 1, characterized in that: The welding rod conveying mechanism (2) further comprises a guide plate (22), wherein the guide plate (22) is fixed on the main frame (6), and the welding rod (7) is slidably connected to the guide plate (22).

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