An automatic welding device for a heavy-duty fan grille and its welding method

Abstract

The present invention relates to an automatic welding device for a heavy-duty fan shroud and a welding method thereof, which includes an upper mounting platform and a lower mounting platform. An upper welding electrode is provided on the upper mounting platform, and a lower welding electrode is provided on the lower mounting platform. A heavy-duty fan shroud is arranged between the upper welding electrode and the lower welding electrode. A camera captures an image of the heavy-duty fan shroud and sends it to a control unit, and the control unit determines the number of welding points and the welding positions according to the image; the lower mounting platform is provided with a cold air output device, and after welding, the cold air output device is used to rapidly cool the welding area to reduce heat accumulation and local stress; the upper mounting platform is provided with an infrared temperature measurement device capable of monitoring the temperature distribution data of the heavy-duty fan shroud after being cooled by cold air, and the control unit determines the position of the next welding point according to the temperature distribution data output by the infrared temperature measurement device, so as to avoid the influence of the heat accumulation of the previous welding point on the next welding point.

Description

Technical Field

[0001] The present invention relates to the field of automatic welding, and in particular to an automatic welding device for a heavy-duty fan shroud and a welding method thereof. Background Art

[0002] A heavy-duty fan shroud is usually composed of multiple components (such as grids, frames, stiffeners, etc.). During welding, precise docking between components needs to be ensured to avoid misalignment or gaps.

[0003] However, the heat generated during the arc welding process can cause material expansion and contraction, which easily leads to deformation of the shroud. Especially for large shrouds, the deformation problem is more prominent. In the prior art, reasonable welding sequences, fixture fixation, and preheating / post-heat treatment are required to control deformation, but the effect is not good, and it affects welding efficiency and welding quality. Summary of the Invention

[0004] The present invention designs an automatic welding device for a heavy-duty fan shroud and a welding method thereof. The technical problem it solves is that the heat generated during the welding process of a heavy-duty fan shroud in the prior art can cause material expansion and contraction, which easily leads to deformation of the shroud, and the traditional control process has problems of low welding efficiency and poor welding quality.

[0005] To solve the above-mentioned existing technical problems, the present invention adopts the following solutions:

[0006] An automatic welding device for a heavy-duty fan shroud includes an upper mounting platform and a lower mounting platform. An upper welding electrode is provided on the upper mounting platform, and a lower welding electrode is provided on the lower mounting platform. A heavy-duty fan shroud is arranged between the upper welding electrode and the lower welding electrode. A camera captures an image of the heavy-duty fan shroud and sends it to a control unit. The control unit determines the number of welding points and the welding positions based on the image. The lower mounting platform is provided with a cold air output device, and after welding, the cold air output device is used to quickly cool the welding area to reduce heat accumulation and local stress. The upper mounting platform is provided with an infrared temperature measurement device capable of monitoring the temperature distribution data of the heavy-duty fan shroud after being cooled by cold air. The control unit determines the position of the next welding point based on the temperature distribution data output by the infrared temperature measurement device, thereby avoiding the influence of heat accumulation at the previous welding point on the next welding point.

[0007] Preferably, the upper mounting platform includes a first upper moving member and a second upper moving member. The first upper moving member is provided with a first upper rack vertically arranged, and the second upper moving member is provided with a second upper rack vertically arranged. The first upper rack and the second upper rack arranged in parallel are connected by an upper transmission gear. The transmission gear is connected to the rotating shaft of the upper motor through a transmission mechanism or directly to realize clockwise rotation or counterclockwise rotation. A upper welding electrode is provided at the bottom of the first upper moving member, and an infrared temperature measuring device is provided on the second upper moving member. When the rotating shaft of the upper motor rotates clockwise, the upper welding electrode approaches the heavy-duty fan housing, and the infrared temperature measuring device moves away from the heavy-duty fan housing. When the rotating shaft of the upper motor rotates counterclockwise, the upper welding electrode moves away from the heavy-duty fan housing, and the infrared temperature measuring device approaches the heavy-duty fan housing.

[0008] Preferably, when the cold air output device is working, the infrared temperature measuring device is hidden in the second upper moving member through a position control mechanism. After the cold air output device finishes working, the infrared temperature measuring device is located outside the second upper moving member through the action of the position control mechanism.

[0009] Preferably, the position control mechanism includes an electromagnet, a magnetic body and a stainless steel spring. The second upper moving member is provided with an installation cavity. The left side of the installation cavity close to the first upper moving member is an opening, and the right side of the installation cavity is a closed plate. A magnetic body is provided on the right side of the infrared temperature measuring device. A stainless steel spring is provided between the magnetic body and one side of the closed plate, and an electromagnet is provided on the other side of the closed plate.

[0010] When the electromagnet is activated, the electromagnet adsorbs the magnetic body, causing the infrared temperature measuring device to move towards the closed plate while compressing the stainless steel spring. When the electromagnet is turned off, the stainless steel spring releases its elastic force to push the infrared temperature measuring device out of the installation cavity and collect the temperature of the heavy-duty fan housing after being cooled by the cold air below the first upper moving member.

[0011] Preferably, the lower mounting platform includes a first lower moving member and a second lower moving member. The first lower moving member is provided with a first lower rack vertically arranged, and the second lower moving member is provided with a second lower rack vertically arranged. The first lower rack and the second lower rack arranged in parallel are connected by a lower transmission gear. The transmission gear is connected to the rotating shaft of the lower motor through a transmission mechanism or directly to realize clockwise rotation or counterclockwise rotation. A lower welding electrode is provided at the top of the first lower moving member, and a cold air output device is provided at the top of the second lower moving member. When the rotating shaft of the lower motor rotates clockwise, the lower welding electrode approaches the heavy-duty fan housing, and the cold air output device moves away from the heavy-duty fan housing. When the rotating shaft of the lower motor rotates counterclockwise, the lower welding electrode moves away from the heavy-duty fan housing, and the cold air output device approaches the heavy-duty fan housing.

[0012] Preferably, the upper mounting platform and the lower mounting platform are respectively provided with an X-direction driving device and a Y-direction driving device to realize arbitrary positioning in the horizontal direction, so that the upper welding electrode and the lower welding electrode can reach any welding point of the heavy-duty fan housing.

[0013] Preferably, it further includes a support bracket, and the heavy-duty fan shroud is placed on the support bracket. The support bracket can be driven by a rotating motor to achieve 360° rotation.

[0014] A welding method for an automatic welding device for a heavy-duty fan shroud includes the following steps:

[0015] Step 1: The camera captures an image of the heavy-duty fan shroud and sends it to the control unit. The control unit determines the number and positions of the welding points based on the image.

[0016] Step 2: The control unit controls the X-direction driving devices and Y-direction driving devices of the upper mounting platform and the lower mounting platform respectively according to the positions of the upper welding electrode and the lower welding electrode, so that the upper welding electrode and the lower welding electrode are respectively located directly above and directly below the Nth welding point, where N is a natural number greater than or equal to 1.

[0017] Step 3: Start the upper motor to make the upper welding electrode move downward to contact the Nth welding point, and start the lower motor to make the lower welding electrode move upward to contact the Nth welding point. The upper welding electrode and the lower welding electrode weld the Nth welding point.

[0018] Step 4: After welding is completed, start the lower motor to make the lower welding electrode move away from the heavy-duty fan shroud. The cold air output device approaches the heavy-duty fan shroud, and the cold air output device outputs cold air to cool the heavy-duty fan shroud for A seconds, where A > 0.

[0019] Step 5: Turn off the lower motor and the cold air output device, and turn on the upper motor to make the upper welding electrode move away from the heavy-duty fan shroud. The infrared temperature measuring device approaches the heavy-duty fan shroud.

[0020] Step 6: The infrared temperature measuring device is located outside the second upper moving part through the action of the position control mechanism, and at the same time is located below the first upper moving part to collect the temperature of the heavy-duty fan shroud after being cooled by the cold air.

[0021] Step 7: The control unit calculates the safe distance from the Nth welding point according to the temperature distribution data output by the infrared temperature measuring device, so as to determine the coordinates of the Mth welding point, where M = N + 1.

[0022] Preferably, when welding the Mth welding point is required, repeat Steps 2 - 7, where the value of N is replaced by M + 1. When all welding points are welded, the welding is completed.

[0023] Preferably, in Step 1, the camera captures an image of the heavy-duty fan shroud and determines the number and welding positions of the welding points through image processing technology. The specific steps are as follows:

[0024] Image acquisition: Use a high-resolution camera to take clear images of the heavy-duty fan guard; Image preprocessing: Improve the image quality by denoising and enhancing the contrast; Feature extraction: Use edge detection and template matching techniques to identify the welding points and their positions; Location and recognition: Determine the precise positions of the welding points through image analysis algorithms; Verification and calibration: Compare with the actual positions to ensure the recognition accuracy.

[0025] Compared with the prior art, the automatic welding device for heavy-duty fan guards and its welding method have the following beneficial effects:

[0026] (1) In the present invention, the temperature of the previous welding point is detected by the infrared temperature measurement device, and thus the position of the next welding point is determined according to the safe distance, avoiding the heat generated during the welding process from causing the material to expand and contract, resulting in the deformation of the fan guard.

[0027] (2) In the present invention, the infrared temperature measurement device and the cold air output device cooperate with each other. The cold air output device quickly cools the welding area, and the infrared temperature measurement device checks the cooling effect, changing the disadvantage of wasting time by waiting for cooling in the traditional method and greatly improving the welding efficiency.

[0028] (3) In the present invention, the sensor of the infrared temperature measurement device is sensitive to temperature. If its own temperature changes, it may cause measurement errors. Therefore, it is hidden in the second upper moving part to avoid temperature measurement errors. Description of the Drawings

[0029] Figure 1 : Schematic diagram of the first state of the automatic welding device for heavy-duty fan guards of the present invention;

[0030] Figure 2 : Schematic diagram of the second state of the automatic welding device for heavy-duty fan guards of the present invention;

[0031] Figure 3 : Schematic diagram of the third state of the automatic welding device for heavy-duty fan guards of the present invention;

[0032] Figure 4 : Schematic diagram of the infrared temperature measurement device hidden in the present invention;

[0033] Figure 5 : Schematic diagram of the infrared temperature measurement device exposed in the present invention;

[0034] Figure 6 : Schematic diagram of the moving guiding structure of the infrared temperature measurement device in the present invention.

[0035] Description of the reference numerals:

[0036] 1 - Heavy - duty fan mesh cover; 2 - Upper mounting platform; 21 - First upper moving part; 211 - First upper rack; 22 - Second upper moving part; 221 - Second upper rack; 222 - Installation cavity; 223 - Guide part; 23 - Upper driving gear; 24 - Upper welding electrode; 3 - Lower mounting platform; 31 - First lower moving part; 311 - First lower rack; 32 - Second lower moving part; 321 - Second lower rack; 33 - Lower driving gear; 34 - Lower welding electrode; 35 - Cold - air output device; 4 - Infrared temperature - measuring device; 41 - Electromagnet; 42 - Magnetic body; 43 - Stainless - steel spring. Detailed implementation manners

[0037] The following is combined with Figures 1 to 6 , to further illustrate the present invention:

[0038] As Figures 1-3 shown, the automatic welding device of the present invention for the heavy - duty fan mesh cover includes an upper mounting platform 2 and a lower mounting platform 3. An upper welding electrode 24 is provided on the upper mounting platform 2, and a lower welding electrode 34 is provided on the lower mounting platform 3. A heavy - duty fan mesh cover 1 is arranged between the upper welding electrode 24 and the lower welding electrode 34. A camera captures the image of the heavy - duty fan mesh cover 1 and sends it to the control unit. The control unit determines the number of welding points and the welding positions according to the image; the lower mounting platform 3 is provided with a cold - air output device 35. After welding, the cold - air output device 35 is used to rapidly cool the welding area, reducing heat accumulation and local stress; the upper mounting platform 2 is provided with an infrared temperature - measuring device 4 capable of monitoring the temperature distribution data of the heavy - duty fan mesh cover 1 after being cooled by cold air. The control unit determines the position of the next welding point according to the temperature distribution data output by the infrared temperature - measuring device 4, thereby avoiding the influence of the heat accumulation of the previous welding point on the next welding point.

[0039] The upper mounting platform 2 includes a first upper moving part 21 and a second upper moving part 22. The first upper moving part 21 is provided with a vertically - arranged first upper rack 211, and the second upper moving part 22 is provided with a vertically - arranged second upper rack 221. The parallel - arranged first upper rack 211 and the second upper rack 221 are connected by an upper driving gear 23. The driving gear 23 is connected to the rotating shaft of the upper motor through a transmission mechanism or directly to realize clockwise rotation or counter - clockwise rotation; the bottom of the first upper moving part 21 is provided with an upper welding electrode 24, and the second upper moving part 22 is provided with an infrared temperature - measuring device 4; when the rotating shaft of the upper motor rotates clockwise, the upper welding electrode 24 approaches the heavy - duty fan mesh cover 1, and the infrared temperature - measuring device 4 moves away from the heavy - duty fan mesh cover 1; when the rotating shaft of the upper motor rotates counter - clockwise, the upper welding electrode 24 moves away from the heavy - duty fan mesh cover 1, and the infrared temperature - measuring device 4 approaches the heavy - duty fan mesh cover 1.

[0040] The lower mounting platform 3 includes a first lower moving member 31 and a second lower moving member 32. The first lower moving member 31 is provided with a first lower rack 311 arranged vertically, and the second lower moving member 32 is provided with a second lower rack 321 arranged vertically. The first lower rack 311 and the second lower rack 321 arranged in parallel are connected by a lower transmission gear 33. The transmission gear 33 is connected to the rotating shaft of the lower motor through a transmission mechanism or directly to realize clockwise rotation or counterclockwise rotation. A lower welding electrode 34 is provided at the top of the first lower moving member 31, and a cold air output device 35 is provided at the top of the second lower moving member 32. When the rotating shaft of the lower motor rotates clockwise, the lower welding electrode 34 approaches the heavy-duty fan shroud 1, and the cold air output device 35 moves away from the heavy-duty fan shroud 1. When the rotating shaft of the lower motor rotates counterclockwise, the lower welding electrode 34 moves away from the heavy-duty fan shroud 1, and the cold air output device 35 approaches the heavy-duty fan shroud 1.

[0041] The upper mounting platform 2 and the lower mounting platform 3 are respectively provided with an X-direction driving device and a Y-direction driving device to achieve arbitrary positioning in the horizontal direction, so that the upper welding electrode 24 and the lower welding electrode 34 can reach any welding point of the heavy-duty fan shroud 1.

[0042] It further includes a support bracket. The heavy-duty fan shroud 1 is placed on the support bracket, and the support bracket can be driven by a rotating motor to achieve 360° rotation.

[0043] As Figure 4 and Figure 5 As shown, when the cold air output device 35 is working, the infrared temperature measuring device 4 is hidden in the second upper moving member 22 through the position control mechanism; after the cold air output device 35 finishes working, the infrared temperature measuring device 4 is located outside the second upper moving member 22 through the action of the position control mechanism. The sensor of the infrared temperature measuring device is sensitive to temperature. If its own temperature changes, that is, affected by the cold air output device 35, it may cause measurement errors.

[0044] The position control mechanism includes an electromagnet 41, a magnetic body 42 and a stainless steel spring 43. The second upper moving member 22 is provided with an installation cavity 222. The left side of the installation cavity 222 close to the first upper moving member 21 is open, and the right side of the installation cavity 222 is a closed plate. A magnetic body 42 is provided on the right side of the infrared temperature measuring device 4. A stainless steel spring 43 is provided between the magnetic body 42 and one side of the closed plate, and an electromagnet 41 is provided on the other side of the closed plate. When the electromagnet 41 is started, the electromagnet 41 adsorbs the magnetic body 42 to make the infrared temperature measuring device 4 move towards the closed plate while compressing the stainless steel spring 43. When the electromagnet 41 is turned off, the stainless steel spring 43 releases its elastic force to push the infrared temperature measuring device 4 out of the installation cavity 222 and be located below the first upper moving member 21 to collect the temperature of the heavy-duty fan shroud 1 cooled by the cold air.

[0045] As Figure 6As shown, a guide member 223 is further provided at the bottom of the installation cavity 222, and a corresponding guide groove is provided at the bottom of the infrared temperature measuring device 4 to ensure that the infrared temperature measuring device 4 can move horizontally stably.

[0046] The welding method of the automatic welding device for the heavy-duty fan shroud of the present invention includes the following steps:

[0047] Step 1: The camera captures the image of the heavy-duty fan shroud 1 and sends it to the control unit, and the control unit determines the number and positions of the welding points according to the image.

[0048] Step 2: According to the positions of the upper welding electrode 24 and the lower welding electrode 34, the control unit controls the X-direction driving devices and Y-direction driving devices of the upper mounting platform 2 and the lower mounting platform 3 respectively, so that the upper welding electrode 24 and the lower welding electrode 34 are respectively located directly above and directly below the Nth welding point, where N is a natural number greater than or equal to 1.

[0049] Step 3: Start the upper motor to make the upper welding electrode 24 move downward to contact the Nth welding point, start the lower motor to make the lower welding electrode 34 move upward to contact the Nth welding point, and the upper welding electrode 24 and the lower welding electrode 34 weld the Nth welding point.

[0050] Step 4: After welding is completed, start the lower motor to make the lower welding electrode 34 move away from the heavy-duty fan shroud 1, and the cold air output device 35 approaches the heavy-duty fan shroud 1. The cold air output device 35 outputs cold air to cool the heavy-duty fan shroud 1 for A seconds, where A > 0.

[0051] Step 5: Turn off the lower motor and the cold air output device 35, turn on the upper motor to make the upper welding electrode 24 move away from the heavy-duty fan shroud 1, and the infrared temperature measuring device 4 approaches the heavy-duty fan shroud 1.

[0052] Step 6: The infrared temperature measuring device 4 is located outside the second upper moving member 22 through the action of the position control mechanism, and at the same time is located below the first upper moving member 21 to collect the temperature of the heavy-duty fan shroud 1 after being cooled by cold air.

[0053] Step 7: The control unit calculates the safe distance from the Nth welding point according to the temperature distribution data output by the infrared temperature measuring device 4, so as to determine the coordinates of the Mth welding point, where M = N + 1.

[0054] For example: when the temperature of the first welding point is T °C, the area beyond the distance L from the first welding point is the safe distance, and the nearest welding point outside the safe distance is selected as the second welding point.

[0055] When welding the Mth welding point is required, repeat steps 2 - 7, where the value of N is replaced by M + 1. When all welding points are welded, the welding is completed.

[0056] In Step 1, the camera captures an image of the heavy-duty fan shroud 1, and determines the number of welding points and welding positions through image processing technology. The specific steps are as follows: Image acquisition: Use a high-resolution camera to capture a clear image of the heavy-duty fan shroud 1; Image preprocessing: Improve the image quality by denoising and enhancing the contrast; Feature extraction: Use edge detection and template matching technologies to identify the welding points and positions; Positioning and recognition: Determine the precise positions of the welding points through image analysis algorithms; Verification and calibration: Compare with the actual positions to ensure the accuracy of recognition.

[0057] The present invention has been described exemplarily in conjunction with the accompanying drawings. Obviously, the implementation of the present invention is not limited by the above-mentioned methods. As long as various improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An automatic welding device for a heavy-duty fan grille, comprising an upper mounting platform (2) and a lower mounting platform (3). An upper welding electrode (24) is provided on the upper mounting platform (2), and a lower welding electrode (34) is provided on the lower mounting platform (3). A heavy-duty fan grille (1) is arranged between the upper welding electrode (24) and the lower welding electrode (34), and it is characterized in that: A camera captures an image of the heavy-duty fan grille (1) and sends it to a control unit, and the control unit determines the number of welding points and the welding positions according to the image; The lower mounting platform (3) is provided with a cold air output device (35). After welding, the cold air output device (35) is used to rapidly cool the welding area, reducing heat accumulation and local stress; The upper mounting platform (2) is provided with an infrared temperature measurement device (4) capable of monitoring the temperature distribution data of the heavy-duty fan grille (1) after being cooled by cold air. The control unit determines the position of the next welding point according to the temperature distribution data output by the infrared temperature measurement device (4), thereby avoiding the influence of the heat accumulation of the previous welding point on the next welding point; The upper mounting platform (2) includes a first upper moving member (21) and a second upper moving member (22). The first upper moving member (21) is provided with a first upper rack (211) arranged vertically, and the second upper moving member (22) is provided with a second upper rack (221) arranged vertically. The parallel first upper rack (211) and the second upper rack (221) are connected by an upper transmission gear (23), and the upper transmission gear (23) is connected to the rotating shaft of the upper motor through a transmission mechanism or directly to realize clockwise rotation or counterclockwise rotation; The bottom of the first upper moving member (21) is provided with an upper welding electrode (24), and the second upper moving member (22) is provided with an infrared temperature measurement device (4); When the rotating shaft of the upper motor rotates clockwise, the upper welding electrode (24) approaches the heavy-duty fan grille (1), and the infrared temperature measurement device (4) moves away from the heavy-duty fan grille (1); When the rotating shaft of the upper motor rotates counterclockwise, the upper welding electrode (24) moves away from the heavy-duty fan grille (1), and the infrared temperature measurement device (4) approaches the heavy-duty fan grille (1); The infrared temperature measurement device (4) is hidden in the second upper moving member (22) through a position control mechanism when the cold air output device (35) is working; After the cold air output device (35) finishes working, the infrared temperature measurement device (4) is located outside the second upper moving member (22) through the action of the position control mechanism; The position control mechanism includes an electromagnet (41), a magnetic body (42), and a stainless steel spring (43). The second upper moving member (22) is provided with an installation cavity (222). The left side of the installation cavity (222) close to the first upper moving member (21) is an opening, and the right side of the installation cavity (222) is a closed plate. A magnetic body (42) is provided on the right side of the infrared temperature measurement device (4). A stainless steel spring (43) is arranged between the magnetic body (42) and one side of the closed plate, and an electromagnet (41) is arranged on the other side of the closed plate; When the electromagnet (41) is activated, the electromagnet (41) attracts the magnetic body (42), causing the infrared temperature measuring device (4) to move towards the closing plate while compressing the stainless steel spring (43); when the electromagnet (41) is deactivated, the stainless steel spring (43) releases its elastic force to push the infrared temperature measuring device (4) out of the installation cavity (222) and position it below the first upward moving member (21) to collect the temperature of the heavy-duty fan grille (1) after being cooled by cold air.

2. The automatic welding device for a heavy-duty fan grille according to claim 1, characterized in that: The lower installation platform (3) includes a first lower moving member (31) and a second lower moving member (32). The first lower moving member (31) is provided with a first lower rack (311) arranged vertically, and the second lower moving member (32) is provided with a second lower rack (321) arranged vertically. The parallel first lower rack (311) and the second lower rack (321) are connected by a lower transmission gear (33). The lower transmission gear (33) is connected to the rotating shaft of the lower motor through a transmission mechanism or directly to achieve clockwise or counterclockwise rotation; a lower welding electrode (34) is provided at the top of the first lower moving member (31), and a cold air output device (35) is provided at the top of the second lower moving member (32); when the rotating shaft of the lower motor rotates clockwise, the lower welding electrode (34) approaches the heavy-duty fan grille (1), and the cold air output device (35) moves away from the heavy-duty fan grille (1); when the rotating shaft of the lower motor rotates counterclockwise, the lower welding electrode (34) moves away from the heavy-duty fan grille (1), and the cold air output device (35) approaches the heavy-duty fan grille (1).

3. The automatic welding device for the heavy-duty fan grille according to claim 2, characterized in that: The upper installation platform (2) and the lower installation platform (3) are respectively provided with an X-direction driving device and a Y-direction driving device to achieve arbitrary positioning in the horizontal direction, so that the upper welding electrode (24) and the lower welding electrode (34) can reach any welding point of the heavy-duty fan grille (1).

4. The automatic welding device for the heavy-duty fan grille according to claim 3, wherein: It further includes a support bracket. The heavy-duty fan grille (1) is placed on the support bracket, and the support bracket can be driven by a rotating motor to achieve 360° rotation.

5. A welding method for the automatic welding device for a heavy-duty fan grille according to claim 3 or 4, comprising the following steps: Step 1: The camera captures an image of the heavy-duty fan grille (1) and sends it to the control unit. The control unit determines the number and positions of the welding points based on the image. Step 2: According to the positions of the upper welding electrode (24) and the lower welding electrode (34), the control unit controls the X-direction driving devices and Y-direction driving devices of the upper installation platform (2) and the lower installation platform (3) respectively, so that the upper welding electrode (24) and the lower welding electrode (34) are respectively located directly above and directly below the Nth welding point, where N is a natural number greater than or equal to 1. Step 3: Start the upper motor to make the upper welding electrode (24) move downward to contact the Nth welding point, start the lower motor to make the lower welding electrode (34) move upward to contact the Nth welding point, and the upper welding electrode (24) and the lower welding electrode (34) weld the Nth welding point. Step 4: After welding is completed, start the lower motor to move the lower welding electrode (34) away from the heavy-duty fan housing (1), and move the cold air output device (35) closer to the heavy-duty fan housing (1). The cold air output device (35) outputs cold air to cool the heavy-duty fan housing (1) for A seconds, where A > 0; Step 5: Turn off the lower motor and the cold air output device (35), and start the upper motor to move the upper welding electrode (24) away from the heavy-duty fan housing (1), and move the infrared temperature measurement device (4) closer to the heavy-duty fan housing (1); Step 6: The infrared temperature measurement device (4) is located outside the second upper moving part (22) through the action of the position control mechanism, and at the same time is located below the first upper moving part (21) to collect the temperature of the heavy-duty fan housing (1) after being cooled by cold air; Step 7: The control unit calculates the safe distance from the Nth welding point according to the temperature distribution data output by the infrared temperature measurement device (4), so as to determine the coordinates of the Mth welding point, where M = N + 1.

6. The welding method of the automatic welding device for the heavy-duty fan shroud according to claim 5, characterized in that: When welding the Mth welding point is required, repeat Steps 2 - 7, where the value of N is replaced by M + 1. When all welding points are welded, the welding is completed.

7. The welding method of the automatic welding device for a heavy-duty fan housing according to claim 5, characterized in that: In Step 1, the camera captures an image of the heavy-duty fan housing (1) and sends it to the control unit. The control unit determines the number and positions of the welding points according to the image. The specific steps are as follows: Image acquisition: Use a high-resolution camera to capture a clear image of the heavy-duty fan housing (1); Image preprocessing: Improve the image quality by denoising and enhancing the contrast; Feature extraction: Use edge detection and template matching techniques to identify the welding points and their positions; Positioning and recognition: Determine the exact positions of the welding points through image analysis algorithms; Verification and calibration: Compare with the actual positions to ensure the accuracy of recognition.

Images