A square inner hole laser welding device and welding method

Abstract

The application relates to the technical field of laser welding equipment, in particular to a square inner hole laser welding equipment and a welding method, which comprises a supporting table, a fixing frame is fixedly installed on the top of the supporting table, a motor is fixedly installed on the top of the fixing frame, a hydraulic cylinder is installed on the output end of the motor, a mounting plate is fixedly installed on the output end of the hydraulic cylinder, a welding head is installed on the mounting plate, a positioning and correcting mechanism is arranged below the welding head, the positioning and correcting mechanism comprises two first fixing plates which are fixedly installed on the supporting table in a symmetrical mode, second fixing plates are installed on the sides, which are close to each other, of the two first fixing plates in a vertical staggered mode from top to bottom, the positioning and correcting mechanism can make butt joint of square pipes more rapid and accurate, can avoid the problems of insufficient welding firmness and influence on the aesthetic property, can also avoid material waste and improve work efficiency.

Description

Technical Field

[0001] This invention relates to a laser welding device for square internal holes, and more particularly to a laser welding device and welding method for square internal holes, belonging to the technical field of laser welding equipment. Background Technology

[0002] Laser welding is a welding method that uses a focused laser beam as an energy source to bombard the workpiece and generate heat. Due to the optical properties of lasers such as refraction and focusing, laser welding is very suitable for welding micro parts and areas with poor accessibility. Laser welding also has the characteristics of low heat input, small welding deformation, and no influence from electromagnetic fields.

[0003] When welding square tubes, laser welding is usually performed in the square inner hole of the tube to ensure the aesthetic appearance of the welded surface. Before welding, the welding equipment is usually manually aligned and corrected before being fixed. Manual alignment is slow and not precise enough, which can easily lead to an insufficiently strong weld and affect the aesthetic appearance of the welded surface, resulting in material waste and reduced work efficiency.

[0004] Therefore, improvements are urgently needed to address the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a laser welding device and method for square inner holes. The device uses a positioning laser to position and correct the joint of two square tubes, which makes the joint of square tubes faster and more accurate, avoids insufficient welding and affects the aesthetics, and also avoids material waste and improves work efficiency.

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include: A square internal hole laser welding device includes a support platform. A fixing frame is fixedly installed on the top of the support platform. A motor is fixedly installed on the top of the fixing frame. A hydraulic cylinder is installed on the output end of the motor. A mounting plate is fixedly installed on the output end of the hydraulic cylinder. A welding head is installed on the mounting plate. A positioning and correction mechanism is provided below the welding head. The positioning and correction mechanism includes two first fixing plates symmetrically fixedly installed on the support platform. A second fixing plate is installed opposite to each other from top to bottom on one side of the two first fixing plates. A fixing frame is fixedly installed at one end of the second fixing plate. Two first electric telescopic rods are symmetrically fixedly installed on the fixing frame. Two clamps connected to the first electric telescopic rods are provided inside the fixing frame. Two first support frames are fixedly installed on the surfaces of the two fixing frames. A positioning laser is installed on the first support frame.

[0007] Preferably, the outer side of the positioning laser is fitted with a protective frame that is connected to the first support frame by bolts, and the protective frame has a slot.

[0008] Preferably, two fans are fixedly installed on the surface of the fixed frame, and a filter tube is installed on the input end of the fan extending into the fixed frame. Both sides of the welding head are provided with suction nozzles that are installed and connected to the fixed frame through multiple fixing rods, and the suction nozzles are connected to the filter tubes.

[0009] Preferably, a second support frame is fixedly installed on the support platform, and two second electric telescopic rods are symmetrically fixedly installed on the second support frame. Fans are installed on the output ends of the two second electric telescopic rods.

[0010] Preferably, multiple guide rails are symmetrically fixedly installed on the inner wall of the support platform, and a baffle connected to the guide rails is provided above the fan.

[0011] Preferably, the mounting plate has a groove, and two springs are symmetrically fixedly installed inside the groove, with a locking rod fixedly installed on one end of each spring.

[0012] Preferably, a locking block that engages with the locking rod is fixedly installed on the welding head, and one end of the locking rod is arc-shaped.

[0013] Preferably, a first storage box and a second storage box are fixedly installed on the front of the support platform, and a movable door is provided on one side of the second storage box via a hinge.

[0014] Preferably, a label box is fixedly installed on the front of both the first storage box and the second storage box, and the label box is equipped with a glass window.

[0015] Preferably, it includes the following steps: Step 1: Install the two square tubes vertically on the inner walls of the two fixed frames respectively, and connect the two square tubes together. Activate the positioning laser to calibrate the connection point of the two square tubes so that the connection point of the two square tubes is in the middle of the two fixed frames and to prevent displacement. Then, activate the two first electric telescopic rods at the same time to push the clamping plate to clamp and fix the square tubes. Step 2: After fixing the square tubes together, start the hydraulic cylinder to drive the welding head down so that the welding end extends into the joint of the square tubes. Start the welding head and start the motor to drive it to rotate to weld the inner hole of the square tubes. Step 3: During the welding process, start the two fans. The fans draw in the welding gas through the suction nozzle and filter pipe and filter it out. Step 4: After welding is completed, start the second electric telescopic rod to drive the fan to rise, and start the fan to send air to the welded square tube to cool it.

[0016] This invention has at least the following beneficial effects: By setting up a positioning and correction mechanism, two square tubes are placed in two fixed frames distributed above and below and initially joined together. After the joining is completed, the positioning laser is activated to position and correct the joining point of the square tubes using a laser light source, preventing the joining of the two square tubes from being misaligned. After correction, two first electric telescopic rods are activated to push the clamping plate to fix and hold the square tubes. Using a positioning laser to position and correct the joining point of the two square tubes makes the joining of square tubes faster and more accurate, avoiding insufficient welding and affecting aesthetics. It also avoids material waste and improves work efficiency. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the fixed frame structure of the present invention; Figure 3 This is a schematic diagram of the protective frame structure of the present invention; Figure 4 This is a schematic diagram of the fan structure of the present invention; Figure 5 This is a schematic diagram of the filter tube structure of the present invention; Figure 6 This is a schematic diagram of the lever structure of the present invention.

[0018] In the diagram, 1. Support platform; 2. Fixing frame; 3. Motor; 4. Hydraulic cylinder; 5. Mounting plate; 6. Welding head; 7. Positioning and correction mechanism; 8. First fixing plate; 9. Second fixing plate; 10. Fixing frame; 11. First electric telescopic rod; 12. Clamping plate; 13. First support frame; 14. Positioning laser; 15. Protective frame; 16. Empty slot; 17. Fan; 18. Filter tube; 19. Fixing rod; 20. Suction nozzle; 21. Second support frame; 22. Second electric telescopic rod; 23. Fan; 24. Guide rail; 25. Baffle; 26. Groove; 27. Spring; 28. Locking rod; 29. ​​Locking block; 30. First storage box; 31. Second storage box; 32. Movable door; 33. Label box; 34. Glass window. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-6 As shown in this embodiment, a laser welding device and welding method for square internal holes are provided.

[0021] A square internal hole laser welding device includes a support platform 1, a fixed frame 2 fixedly installed on the top of the support platform 1, a motor 3 fixedly installed on the top of the fixed frame 2, a hydraulic cylinder 4 installed on the output end of the motor 3, a mounting plate 5 fixedly installed on the output end of the hydraulic cylinder 4, a welding head 6 installed on the mounting plate 5, and a positioning and correction mechanism 7 provided below the welding head 6. The positioning and correction mechanism 7 includes two first fixed plates 8 symmetrically fixedly installed on the support platform 1, and two second fixed plates 9 installed alternately from top to bottom on the side of the two first fixed plates 8 that are close to each other. A fixed frame 10 is fixedly installed at one end of the second fixed plate 9, and two first electric telescopic rods 11 are symmetrically fixedly installed on the fixed frame 10. Two clamps 12 connected to the first electric telescopic rods 11 are provided inside the fixed frame 10. Two first support frames 13 are fixedly installed on the surfaces of the two fixed frames 10, and a positioning laser 14 is installed on the first support frame 13. By setting up the positioning and correction mechanism 7, the two square tubes are placed in the two fixed frames 10 distributed above and below and initially joined together. After the joining is completed, the positioning laser 14 is activated to position and correct the joining point of the square tubes using a laser light source to prevent the joining of the two square tubes from being misaligned. After correction, the two first electric telescopic rods 11 are activated to push the clamping plate 12 to fix and hold the square tubes. Using the positioning laser 14 to position and correct the joining point of the two square tubes makes the joining of the square tubes faster and more accurate, avoiding insufficient welding and affecting the aesthetics. It also avoids material waste and improves work efficiency.

[0022] like Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, a protective frame 15 is fitted on the outside of the positioning laser 14 and connected to the first support frame 13 by bolts. A slot 16 is opened on the protective frame 15. Two fans 17 are fixedly installed on the surface of the fixed frame 2. A filter tube 18 is installed on the input end of the fan 17 extending into the fixed frame 2. Both sides of the welding head 6 are provided with suction nozzles 20 that are installed and connected to the fixed frame 2 by multiple fixed rods 19, and the suction nozzles 20 are connected to the filter tubes 18. A second support frame 21 is fixedly installed on the support platform 1. Two second electric telescopic rods 22 are symmetrically fixedly installed on the second support frame 21. Fans 23 are installed on the output ends of the two second electric telescopic rods 22. The protective frame 15 protects the positioning laser 14 from collision damage. The slot 16 facilitates the emission of the light source. The fan 17, filter tube 18, fixing rod 19, and suction nozzle 20 facilitate the absorption and filtration of welding exhaust gas, preventing workers from inhaling it and causing harm. The second support frame 21, second electric telescopic rod 22, and fan 23 enable rapid cooling of the welded square tube by activating the second electric telescopic rod 22 to drive the fan 23 upward after welding.

[0023] like Figure 1 , Figure 4 and Figure 6 As shown, multiple guide rails 24 are symmetrically fixedly installed on the inner wall of the support platform 1. A baffle 25 connected to the guide rails 24 is provided above the fan 23. A groove 26 is provided on the mounting plate 5. Two springs 27 are symmetrically fixedly installed inside the groove 26. A locking rod 28 is fixedly installed on one end of the spring 27. A locking block 29 that engages with the locking rod 28 is fixedly installed on the welding head 6. One end of the locking rod 28 is arc-shaped. With the guide rail 24 and baffle 25 in place, during welding, the guide rail 24 pushes the two baffles 25 to move above the fan 23 and fit together, preventing sparks generated during welding from falling onto the fan 23 and causing damage. With the groove 26, spring 27, locking rod 28 and locking block 29 in place, the welding head 6 is installed on the mounting plate 5 by the locking action of the locking rod 28 and locking block 29. Since one side of the locking rod 28 is supported by the spring 27 and one end is arc-shaped, pushing and pulling the welding head 6 will cause the locking block 29 to squeeze the locking rod 28 and retract it, thus completing the installation and removal of the welding head 6, which is convenient to use.

[0024] like Figure 1As shown, a first storage box 30 and a second storage box 31 are fixedly installed on the front of the support platform 1. A hinged door 32 is provided on one side of the second storage box 31. Label boxes 33 are fixedly installed on the front of both the first and second storage boxes 30, and glass windows 34 are installed on the label boxes 33. The first and second storage boxes 30 and 31 facilitate the storage of unwelded and welded square tubes. The hinged door 32 on one side of the second storage box 31 facilitates the removal of collected welded square tubes. The label boxes 33 and glass windows 34 facilitate the placement of identification tags.

[0025] In this embodiment, as Figures 1-6 As shown in the figure, the working process of the square internal hole laser welding equipment and welding method provided in this embodiment is as follows: Step 1: Install the two square tubes vertically on the inner walls of the two fixed frames 10 respectively, and connect the two square tubes together. Start the positioning laser 14 to calibrate the connection point of the two square tubes so that the connection point of the two square tubes is in the middle of the two fixed frames 10 and to prevent displacement. Then, simultaneously start the two first electric telescopic rods 11 to push the clamping plate 12 to clamp and fix the square tubes. Step 2: After fixing the square tubes together, start the hydraulic cylinder 4 to drive the welding head 6 to descend so that its welding end extends into the joint of the square tubes. Start the welding head 6 and start the motor 3 to drive it to rotate to weld the inner hole of the square tubes. Step 3: During the welding process, the two fans 17 are started. The fans 17 draw in and filter the welding gas through the suction nozzle 20 and the filter pipe 18. Step 4: After welding is completed, start the second electric telescopic rod 22 to drive the fan 23 to rise, and start the fan 23 to send air to the welded square tube to cool it.

[0026] In summary, in this embodiment, the square internal hole laser welding equipment and welding method of this embodiment, through the setting of the protective frame 15, can protect the positioning laser 14 and prevent it from being damaged by collision. At the same time, the opening of the slot 16 facilitates the emission of the light source. Through the setting of the fan 17, filter tube 18, fixing rod 19 and suction nozzle 20, it is easy to draw in and filter the exhaust gas generated during welding, preventing workers from inhaling it and causing harm to their bodies. Through the setting of the second support frame 21, the second electric telescopic rod 22 and the fan 23, after welding is completed, the second electric telescopic rod 22 is activated to drive the fan 23 to rise, and the fan 23 is activated to deliver air to the welded square tube, which can quickly cool it down. Through the setting of the guide rail 24 and the baffle 25, during welding, the guide rail 24 is activated to push the two baffles 25 to move to the fan 20. The welding head 6 is mounted on the mounting plate 5 by means of groove 26, spring 27, locking rod 28 and locking block 29. Since one side of the locking rod 28 is supported by spring 27 and the other end is arc-shaped, the welding head 6 can be installed and disassembled by pushing and pulling the welding head 6 so that the locking block 29 can squeeze the locking rod 28 to retract it. The first storage box 30 and the second storage box 31 are provided for easy storage of unwelded square tubes and welded square tubes. The second storage box 31 has a movable door 32 on one side for easy removal of the collected welded square tubes. The label box 33 and the glass window 34 are provided for easy placement of identification for identification.

[0027] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0028] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0029] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A square internal hole laser welding device, comprising a support platform (1), a fixing frame (2) fixedly mounted on the top of the support platform (1), a motor (3) fixedly mounted on the top of the fixing frame (2), a hydraulic cylinder (4) mounted on the output end of the motor (3), a mounting plate (5) fixedly mounted on the output end of the hydraulic cylinder (4), and a welding head (6) mounted on the mounting plate (5), characterized in that: A positioning and correction mechanism (7) is provided below the welding head (6). The positioning and correction mechanism (7) includes two first fixing plates (8) symmetrically fixed on the support platform (1). A second fixing plate (9) is installed opposite each other from top to bottom on one side of the two first fixing plates (8). A fixing frame (10) is fixedly installed at one end of the second fixing plate (9). Two first electric telescopic rods (11) are symmetrically fixedly installed on the fixing frame (10). Two clamps (12) connected to the first electric telescopic rods (11) are provided inside the fixing frame (10). Two first support frames (13) are fixedly installed on the surface of the two fixing frames (10). A positioning laser (14) is installed on the first support frame (13). The outer side of the positioning laser (14) is fitted with a bolt connected to the first support frame (13). 13) Connected protective frame (15), the protective frame (15) has a slot (16) on it, two fans (17) are fixedly installed on the surface of the fixed frame (2), the fan (17) extends to the input end inside the fixed frame (2) and a filter tube (18) is installed thereon, both sides of the welding head (6) are provided with suction nozzles (20) that are connected to the fixed frame (2) by multiple fixed rods (19), and the suction nozzles (20) are connected to the filter tubes (18), the mounting plate (5) has a groove (26), two springs (27) are symmetrically fixedly installed inside the groove (26), a clamping rod (28) is fixedly installed on one end of the spring (27), and a clamping block (29) that engages with the clamping rod (28) is fixedly installed on the welding head (6), and one end of the clamping rod (28) is set to be arc-shaped.

2. The square internal hole laser welding equipment according to claim 1, characterized in that: A second support frame (21) is fixedly installed on the support platform (1). Two second electric telescopic rods (22) are symmetrically fixedly installed on the second support frame (21). Fans (23) are installed on the output ends of the two second electric telescopic rods (22).

3. The square internal hole laser welding equipment according to claim 2, characterized in that: Multiple guide rails (24) are symmetrically fixed on the inner wall of the support platform (1), and a baffle (25) connected to the guide rails (24) is provided above the fan (23).

4. The square internal hole laser welding equipment according to claim 3, characterized in that: The support platform (1) is fixedly installed with a first storage box (30) and a second storage box (31) on its front side. The second storage box (31) has a movable door (32) installed on one side by a hinge.

5. A square internal hole laser welding device according to claim 4, characterized in that: Label boxes (33) are fixedly installed on the front of both the first storage box (30) and the second storage box (31), and glass windows (34) are installed on the label boxes (33).

6. A welding method for a square internal hole laser welding device as described in claim 5, characterized in that, Includes the following steps: Step 1: Install the two square tubes vertically on the inner walls of the two fixed frames (10) respectively, and connect the two square tubes together. Start the positioning laser (14) to calibrate the connection point of the two square tubes so that the connection point of the two square tubes is in the middle of the two fixed frames (10) and to prevent displacement. Then, start the two first electric telescopic rods (11) at the same time to push the clamp (12) to clamp and fix the square tubes. Step 2: After fixing the square tubes together, start the hydraulic cylinder (4) to drive the welding head (6) to descend so that its welding head extends into the joint of the square tubes. Start the welding head (6) and start the motor (3) to drive it to rotate to weld the inner hole of the square tubes. Step 3: During the welding process, the two fans (17) are started. The fans (17) draw in the welding gas through the suction nozzle (20) and the filter pipe (18) and filter it out. Step 4: After welding is completed, start the second electric telescopic rod (22) to drive the fan (23) to rise, and start the fan (23) to send air to the welded square tube to cool it.

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