Hot air automatic welding machine

Abstract

An automatic hot air welding machine comprises a welding machine trolley and a blower gun, a support shaft is arranged on the side face of the welding machine trolley, the blower gun is rotatably arranged on the support shaft in a sleeved mode, a detachable balancing weight is arranged at the front end of the welding machine trolley, and a pressing wheel is arranged at the bottom of the detachable balancing weight. The welding machine trolley has the advantages that the detachable balancing weight is arranged at the front end of the welding machine trolley, the balancing weight can be mounted or dismounted according to the material condition of a welded product, and it is ensured that the optimal pressing and welding effect is achieved. The hanging and operation locking functions of the blower gun are achieved through the hook and the magnetic attraction device, the mechanical structure is greatly simplified, meanwhile, operation of operators is more convenient, and the working efficiency is improved. And the guide wheel can be put down and folded through cooperation of the elastic positioning column and the cambered surface groove, operation is easy, and reliability is high.

Description

Technical Field

[0001] This utility model relates to the field of welding machines, and in particular to an automatic hot air welding machine. Background Technology

[0002] Hot air welding machine is a special equipment used for welding waterproof membrane. It is widely used in water conservancy projects, municipal engineering, building waterproofing and other fields. It mainly uses hot air to heat the waterproof membrane (such as PVC, PE, EVA and other materials) to melt it and then weld it together to form a sealed waterproof structure.

[0003] Existing automatic heat sealing welding machines have the following problems:

[0004] The material has poor adaptability. The roll material itself has different hardness. If the material is too soft, it is easy to produce indentations when welding. If the material is too hard, it is easy to cause it to not be pressed tightly and the edges to curl up.

[0005] The hanging and locking structure for the air blower is quite complex. When the blower is in use, it needs to be kept in a locked position via a mechanical structure. When the blower is not in use, it needs to be hung up and removed from the workstation. Existing implementation methods and structures vary, but all are quite complex and affect work efficiency.

[0006] Due to limitations in operating space and material structure, traditional heat-sealing welding machines typically have their travel wheels located on the outside of the machine body, while the welding torch is usually positioned below the center of the machine body. This results in the minimum distance for welding being the distance from the outer end face of the travel wheel to the welding torch. Welding cannot be performed at locations smaller than this distance. Summary of the Invention

[0007] To address the aforementioned issues, a hot air automatic welding machine has been developed. This machine can counterweight the welding trolley according to the actual material conditions, achieving better welding results. It also simplifies the air gun hanging and operation locking structure and further reduces the limit distance of the weldable position.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a hot air automatic welding machine, comprising a welding machine carriage and an air gun, wherein a support shaft is provided on the side of the welding machine carriage, the air gun is rotatably mounted on the support shaft, and a detachable counterweight is provided at the front end of the welding machine carriage, with a pressure roller at the bottom of the detachable counterweight.

[0009] Furthermore, the support shaft includes an optical shaft and a limiting plate. One end of the optical shaft is fixedly installed on the side of the welding trolley, and the other end is connected to the limiting plate. The limiting plate has a groove, and the air gun is sleeved on the optical shaft. The side of the air gun has a hook, which can be inserted into the groove of the limiting plate to hang the air gun.

[0010] Furthermore, a magnetic suction device is provided on the side of the welding machine carriage, and correspondingly, a magnetic block is provided on the side of the hot air gun. When the hot air gun is moved into position along the optical axis to one side of the welding machine carriage, the magnetic suction device can attract and position the hot air gun.

[0011] Furthermore, guide wheels are provided at the rear end of the welding machine trolley.

[0012] Furthermore, the guide wheel includes a base, a connecting rod, and a guide roller. The base is fixedly installed at the rear end of the welding machine carriage. The base has a mounting groove in the middle. One end of the connecting rod is rotatably connected to the mounting groove, and the other end of the connecting rod is connected to the guide roller. An elastic positioning bead is provided on the side wall of the mounting groove. Correspondingly, an arc-shaped concave hole is provided on the side of the connecting rod. When the arc-shaped concave hole is aligned with the elastic positioning bead, the elastic positioning bead can position the connecting rod.

[0013] Furthermore, the air gun includes an air gun body and a nozzle. The nozzle is located at the head of the air gun body. The nozzle is in the shape of an irregular right-angled fan. One right-angled end face serves as an air inlet connected to the air gun body, and the other right-angled end face serves as an air outlet. Several ventilation holes are provided on both the upper and lower end faces of the nozzle.

[0014] Furthermore, a drive wheel is located near the front end of the welding machine, a driven wheel is located near the rear end of the welding machine, and an auxiliary pressure roller assembly is located between the drive wheel and the driven wheel.

[0015] Furthermore, the axial outer end face of the drive wheel is flush with the side end face of the welding machine carriage. The driven wheel includes a driven wheel mounting seat and a driven wheel body. The driven wheel mounting seat is fixedly installed at the bottom of the welding machine carriage. The driven wheel body can be axially translated in the driven wheel mounting seat. The axial outer end face of the auxiliary pressure roller assembly is flush with the side end face of the welding machine carriage.

[0016] The advantages of this utility model are:

[0017] A detachable counterweight is installed at the front of the welding machine carriage. The counterweight can be installed or removed according to the material of the product being welded to ensure the best clamping welding effect.

[0018] The hanging and locking functions of the air gun are achieved using hooks and magnetic devices, which greatly simplifies the mechanical structure, makes it easier for operators to operate, and improves work efficiency.

[0019] The guide wheels can be lowered or folded, achieved through the cooperation of elastic positioning pins and curved grooves, making operation simple and highly reliable.

[0020] The nozzle features an irregular right-angled fan shape, which allows hot air to be output more evenly to the outlet, preventing localized heat loss or overheating and resulting in better welding performance.

[0021] The drive wheel, auxiliary pressure roller assembly, driven wheel, and outer ends of the welding machine carriage are aligned to achieve the narrowest possible welding distance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a hot air automatic welding machine according to the present invention.

[0023] Figure 2 This is a schematic diagram of the overall structure of a hot air automatic welding machine according to the present invention.

[0024] Figure 3 This is a schematic diagram of the overall structure of a hot air automatic welding machine according to the present invention.

[0025] Figure 4 This is a schematic diagram of the structure of the air gun in a hot air automatic welding machine according to the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of the gun head in a hot air automatic welding machine according to the present invention.

[0027] Reference numerals: 1. Pressure roller; 2. Drive wheel; 3. Auxiliary pressure roller assembly; 4. Driven wheel; 5. Connecting rod; 6. Guide roller; 7. Counterweight; 8. Welding trolley; 9. Air gun body; 10. Driven wheel mounting seat; 11. Optical shaft; 12. Limiting plate; 13. Hook; 14. Magnetic attraction device; 15. Magnetic block; 16. Gun head. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] An automatic hot air welding machine includes a welding carriage 8 and an air gun. The welding carriage 8 has a support shaft on its side, and the air gun is rotatably mounted on the support shaft. A detachable counterweight 7 is located at the front end of the welding carriage 8, and a pressure roller 1 is located at the bottom of the detachable counterweight 7. The support shaft includes a light shaft 11 and a limiting plate 12. One end of the light shaft 11 is fixedly mounted on the side of the welding carriage, and the other end is connected to the limiting plate 12. The limiting plate 12 has a groove, and the air gun is mounted on the light shaft 11. A hook 13 is located on the side of the air gun, which can be inserted into the groove of the limiting plate 12 to hang the air gun. A magnetic attraction device 14 is also provided on the side of the welding carriage 8, and correspondingly, a magnetic block 15 is provided on the side of the air gun. When the air gun is moved along the light shaft 11 to one side of the welding carriage 8, the magnetic attraction device 14 can attract and position the air gun. A guide wheel is located at the rear end of the welding carriage 8. The guide wheel includes a base, a connecting rod 5, and a guide roller 6. The base is fixedly installed at the rear end of the welding machine carriage 8. A mounting groove is provided in the middle of the base. One end of the connecting rod 5 is rotatably connected to the mounting groove, and the other end of the connecting rod 5 is connected to the guide roller 6. An elastic positioning bead is provided on the side wall of the mounting groove. Correspondingly, an arc-shaped concave hole is provided on the side of the connecting rod 5. When the arc-shaped concave hole aligns with the elastic positioning bead, the elastic positioning bead can position the connecting rod 5. The air gun includes an air gun body 9 and a nozzle. The nozzle is located at the head of the air gun body 9. The nozzle is irregularly shaped like a right-angled fan. One right-angled end face serves as an air inlet connected to the air gun body 9, and the other right-angled end face serves as an air outlet. Several ventilation holes are provided on both the upper and lower end faces of the nozzle. A drive wheel 2 is located near the front end of the welding machine, and a driven wheel 4 is located near the rear end of the welding machine. An auxiliary pressure roller assembly 3 is also provided between the drive wheel 2 and the driven wheel 4. The axial outer end face of the drive wheel 2 is flush with the side end face of the welding machine carriage 8. The driven wheel 4 includes a driven wheel mounting seat 10 and a driven wheel body. The driven wheel mounting seat 10 is fixedly installed at the bottom of the welding machine carriage 8. The driven wheel body can be axially translated in the driven wheel mounting seat 10. The axial outer end face of the auxiliary pressure roller assembly 3 is flush with the side end face of the welding machine carriage 8.

[0030] The actual usage method is as follows:

[0031] The counterweight 7 is bolted to the front end of the welding machine carriage 8. A pressure roller 1 is located below the counterweight 7. Pressure is applied to the pressure roller 1 by the counterweight 7. For materials that are prone to warping, a certain pressure needs to be applied to ensure that the material is flat during welding.

[0032] Air gun hung up:

[0033] When not in use, the air gun needs to be hung up. The air gun can move left and right on the optical axis 11. When it moves to one end of the limiting plate 12, the air gun is rotated at a certain angle so that the hook 13 can be inserted into the groove of the limiting plate 12, and the air gun is in the hung (non-working) state.

[0034] Welding machine movement, air gun operation:

[0035] The welding machine travels in sync with the operation of the air gun. When the air gun is working, in order to ensure its welding accuracy, it needs to be positioned to a certain extent. When the air gun moves along the optical axis 11 to the end near the side of the welding machine carriage 8, the magnetic attraction device 14 and the magnetic block 15 are attracted to each other, which plays a positioning role for the air gun. When separating, only a certain reverse external force needs to be applied.

[0036] The welding machine trolley 8 has guide wheels at its rear end, which guide the trolley's movement. However, under certain conditions, guide wheels are not needed. In such cases, the guide wheels can be folded upwards, and the guide wheels are positioned by the cooperation of elastic positioning beads and curved concave holes. The elastic positioning beads consist of a spring and a steel ball, with the spring pressing against the steel ball to provide a certain restoring force.

[0037] The nozzle is designed with an irregular fan shape, mainly utilizing its curved edge to change the original vertical airflow to curved airflow. Vertical airflow concentrates the airflow on the outside of the outlet, while the airflow on the inside is less, resulting in uneven heat distribution. Curved airflow allows for a more uniform airflow distribution at the outlet.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this invention is defined by the appended claims rather than the foregoing description, and it is therefore intended to include all variations falling within the meaning and scope of the equivalents of the claims within this invention.

Claims

1. A hot air automatic welding machine, characterized in that, It includes a welding machine carriage (8) and an air gun. The welding machine carriage (8) has a support shaft on its side, and the air gun is rotatably mounted on the support shaft. The front end of the welding machine carriage (8) is provided with a detachable counterweight (7), and the bottom of the detachable counterweight (7) is provided with a pressure roller (1).

2. The hot air automatic welding machine according to claim 1, characterized in that, The support shaft includes an optical shaft (11) and a limiting plate (12). One end of the optical shaft (11) is fixedly installed on the side of the welding trolley, and the other end is connected to the limiting plate (12). The limiting plate (12) has a groove. The air gun is sleeved on the optical shaft (11). The side of the air gun has a hook (13). The hook (13) can be put into the groove of the limiting plate (12) to hang the air gun.

3. The automatic hot air welding machine according to claim 2, characterized in that, A magnetic suction device (14) is also provided on the side of the welding machine carriage (8). Correspondingly, a magnetic block (15) is provided on the side of the air gun. When the air gun moves along the optical axis (11) to the side of the welding machine carriage (8) and is positioned, the magnetic suction device (14) can attract and position the air gun.

4. The automatic hot air welding machine according to claim 1, characterized in that, Guide wheels are provided at the rear end of the welding machine trolley (8).

5. The automatic hot air welding machine according to claim 4, characterized in that, The guide wheel includes a base, a connecting rod (5) and a guide roller (6). The base is fixedly installed at the rear end of the welding machine carriage (8). The base has an installation groove in the middle. One end of the connecting rod (5) is rotatably connected in the installation groove, and the other end of the connecting rod (5) is connected to the guide roller (6). The side wall of the installation groove is provided with an elastic positioning bead. Correspondingly, the side of the connecting rod (5) is provided with an arc-shaped concave hole. When the arc-shaped concave hole is aligned with the elastic positioning bead, the elastic positioning bead can position the connecting rod (5).

6. The automatic hot air welding machine according to claim 1, characterized in that, The air gun includes the air gun body (9) and the nozzle. The nozzle is located at the head of the air gun body (9). The nozzle is in the shape of an irregular right-angled fan. One right-angled end face serves as the air inlet and is connected to the air gun body (9). The other right-angled end face serves as the air outlet. Both the upper and lower end faces of the nozzle are provided with several ventilation holes.

7. The automatic hot air welding machine according to claim 1, characterized in that, A drive wheel (2) is provided near the front end of the welding machine carriage (8), and a driven wheel (4) is provided near the rear end of the welding machine carriage (8). An auxiliary pressure wheel assembly (3) is also provided between the drive wheel (2) and the driven wheel (4).

8. A hot air automatic welding machine according to claim 7, characterized in that, The axial outer end face of the drive wheel (2) is flush with the side end face of the welding machine carriage (8). The driven wheel (4) includes a driven wheel mounting seat (10) and a driven wheel body. The driven wheel mounting seat (10) is fixedly installed at the bottom of the welding machine carriage (8). The driven wheel body can be axially translated in the driven wheel mounting seat (10). The axial outer end face of the auxiliary pressure roller assembly (3) is flush with the side end face of the welding machine carriage (8).

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