Automatic welding device for high-temperature alloy

Abstract

The application discloses a high-temperature alloy automatic welding device and relates to the field of welding.The device comprises a mounting seat, wherein a welding gun is arranged in the mounting seat; the welding gun has a first position for preheating and a second position for welding; a foolproof mechanism is arranged on the mounting seat; when preheating is not performed at the welding position, the welding gun is fixed at the first position; and after preheating is performed at the welding position, the foolproof mechanism moves the welding gun from the first position to the second position.The high-temperature alloy automatic welding device can avoid direct welding when preheating is not performed at the welding position, thereby reducing the risk of cold cracking at the welding position.

Description

Technical Field

[0001] This invention relates to the field of welding, and more specifically to an automatic welding device for high-temperature alloys. Background Technology

[0002] As is well known, pipe welding is a processing method that joins two or more pipes together by melting metal or other materials. This method typically uses high temperatures to melt the filler material, fusing it with the workpiece surface and forming a strong joint upon cooling. Before pipe welding, the areas to be welded need to be preheated to reduce the risk of cold cracking at the weld.

[0003] For example, patent application number 202110608375.6, application date June 1, 2021, entitled "Automatic All-Position Welding Machine for Pipelines," includes a ring track installed circumferentially along the pipeline, a traveling mechanism, a welding mechanism, and a wire feeding mechanism. The traveling mechanism, welding mechanism, and wire feeding mechanism are laid flat along the circumference of the pipeline. The welding mechanism includes a welding torch mounted on a mounting base, a first motor, and a second motor. Both the first motor and the second motor are arranged axially along the pipeline. A lead screw is connected to the output shaft of the first motor, and a nut is fitted onto the lead screw. A drive rod is arranged parallel to the lead screw, with one end connected to the nut via a connector, and the other end extending from a second housing and connected to a mounting block for driving the mounting block to move. This invention, the automatic all-position welding machine for pipelines, achieves automatic welding of the pipeline in all directions, ensuring the equipment always operates close to the pipeline during use. This improves welding accuracy and is suitable for welding scenarios with small distances between pipelines.

[0004] The shortcoming of the existing technology is that when novices use welding machines to weld pipes, they may weld directly without preheating the welding position, which increases the risk of cold cracking at the weld position. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic welding device for high-temperature alloys to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An automatic welding device for high-temperature alloys includes a mounting base, inside which a welding torch is disposed; the welding torch has a first position for preheating and a second position for welding; the mounting base is provided with a foolproof mechanism, which fixes the welding torch in the first position when the welding position is not preheated, and after the welding position is preheated, the foolproof mechanism moves the welding torch from the first position to the second position.

[0008] The aforementioned high-temperature alloy automatic welding device further includes a machine base, on which a rotating frame is provided, and the mounting base is fixedly connected to the rotating frame;

[0009] It also includes a first power assembly for driving the rotation of the rotating frame.

[0010] The above-mentioned high-temperature alloy automatic welding device includes a first power component comprising a drive motor and a gear fixedly connected to the output end of the drive motor. A gear ring is provided on the outer circumferential surface of the rotating frame. The drive motor is fixedly connected to the machine base, and the gear meshes with the gear ring.

[0011] The above-mentioned high-temperature alloy automatic welding device includes a fault-prevention mechanism comprising a heat-conducting rod, a sealing cavity provided inside the mounting base, a welding torch being slidably and sealingly connected to the sealing cavity, the heat-conducting rod being disposed on the mounting base, one end of the heat-conducting rod abutting against the pipe fitting, and the other end of the heat-conducting rod extending through the side wall of the mounting base into the sealing cavity.

[0012] In the above-mentioned high-temperature alloy automatic welding device, a gas guide hole and a sliding cavity are provided in the side wall of the sealed cavity. One end of the gas guide hole is connected to the sliding cavity, and the other end of the gas guide hole is connected to the sealed cavity. A locking block is slidably arranged in the sliding cavity. A locking groove adapted to the locking block is provided on the welding torch. When the welding torch is in the second position, the locking block is inserted into the locking groove.

[0013] In the above-mentioned high-temperature alloy automatic welding device, the welding torch is provided with a sealing tube, the sealing tube penetrates the bottom wall of the sealing cavity, and the sealing tube is dynamically sealed to the sealing cavity.

[0014] The above-mentioned high-temperature alloy automatic welding device includes a welding torch comprising a body and a barrel communicating with the body. The barrel is provided with a flow-dividing mechanism, which is used to increase the preheating range of the welding torch when the welding torch is in the first position.

[0015] The above-mentioned high-temperature alloy automatic welding device includes a flow divider plate, a through hole on the gun barrel, and the flow divider plate rotatably mounted on the through hole.

[0016] It also includes a second power assembly for driving the splitter plate to rotate.

[0017] In the aforementioned high-temperature alloy automatic welding device, a heat-conducting pipe is provided on the flow divider plate.

[0018] The aforementioned high-temperature alloy automatic welding device also includes a fixing mechanism for fixing the position of the pipe fittings.

[0019] In the above technical solution, the present invention provides an automatic high-temperature alloy welding device. By setting a foolproof mechanism, when the welding position is not preheated, the welding torch is fixed in a first position. After the welding position is preheated, the foolproof mechanism moves the welding torch from the first position to a second position. This can avoid welding directly when the welding position is not preheated, thereby reducing the risk of cold cracking at the welding position. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a front view structural diagram provided for an embodiment of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the mounting base provided in an embodiment of the present invention;

[0023] Figure 3 for Figure 2 Enlarged view of the local structure at point A;

[0024] Figure 4 for Figure 2 Enlarged view of the local structure at point B in the middle.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Mounting base; 2. Welding torch; 201. Body; 202. Torch barrel; 3. Machine base; 4. Rotating frame; 5. Pipe fittings; 6. Drive motor; 7. Gear; 8. Gear ring; 9. Groove; 10. Heat-conducting rod; 11. Sealing cavity; 12. Air vent; 13. Sliding cavity; 14. Locking block; 15. Locking groove; 16. Sealing tube; 17. Diverter plate; 18. Through hole; 19. Rotating shaft; 20. Heat-conducting pipe; 21. Traction wire; 22. Sliding groove; 2201. First section; 2202. Second section; 23. Transmission rod; 24. Spring. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] In the description of this invention, it should be understood that... Figure 2The orientation of the barrel 202 relative to the body 201 is upward, and vice versa. The terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0029] Reference Figure 1-4 The present invention provides an automatic high-temperature alloy welding device, including a mounting base 1, wherein a welding torch 2 is disposed inside the mounting base 1; the welding torch 2 has a first position for preheating and a second position for welding; the mounting base 1 is provided with a foolproof mechanism, which fixes the welding torch 2 in the first position when the welding position is not preheated, and after the welding position is preheated, the foolproof mechanism moves the welding torch 2 from the first position to the second position.

[0030] Specifically, when welding pipe fittings 5, the two pipe fittings 5 ​​to be welded are arranged correspondingly at the welding positions. The outlet end of the welding torch 2 is aligned with the welding position. The high temperature sprayed from the welding torch 2 melts the joint or filler material of the two pipe fittings 5, and then cools them to achieve the connection of the pipe fittings 5. This is existing technology and will not be elaborated further. One of the core innovations of this invention is that the welding torch 2 is fixed by the mounting base 1. The mounting base 1 is a hollow U-shaped structure. The welding torch 2 is slidably connected to the mounting base 1, and the position of the mounting base 1 is fixed. By controlling the length of the internal space between the welding torch 2 and the mounting base 1, the distance between the end of the welding torch 2 and the welding position is controlled. The first position is the welding torch... The end of the welding torch 2 is far from the welding position, while the second position, i.e., the end of the welding torch 2, is close to the welding position. The foolproof mechanism is a combination of a temperature detection module and an existing linear reciprocating drive mechanism such as an electric push rod. The purpose of this arrangement is that before welding, the electric push rod fixes the welding torch 2 to the first position and turns on the welding torch 2. Since the welding torch 2 is far from the welding position, the temperature transmitted from the welding torch 2 to the welding position will not be too high, that is, it only achieves a preheating effect. When the temperature detection module detects that the temperature of the welding position is sufficient for welding, the electric push rod switches the welding torch 2 from the first position to the second position. This can prevent welding from being carried out directly without preheating the welding position, thereby reducing the risk of cold cracking at the welding position.

[0031] It should be noted that only the starting position needs to be preheated before welding, because the preheating process is short. During welding, the welding torch 2 moves slowly. When welding, the heat from the welding position will be transferred to the surroundings through the side wall of the pipe fitting 5, including the rear of the welding torch 2's movement stroke. This heat can be used to provide the heat required for preheating the rear of the welding torch 2's movement stroke.

[0032] Furthermore, it also includes a machine base 3, on which a rotating frame 4 is mounted. The bottom end of the U-shaped mounting base 1 is fixed to the inner side wall of the rotating frame 4. It also includes a first power assembly for driving the rotating frame 4 to rotate. The first power assembly includes a drive motor 6 and a gear 7 fixedly connected to the output end of the drive motor 6. A gear ring 8 is provided on the outer circumferential surface of the rotating frame 4. The drive motor 6 is fixedly connected to the machine base 3, and the gear 7 meshes with the gear ring 8. Specifically, the machine base 3 is cuboid in shape, with a groove 9 in the middle of its top. Arc-shaped grooves are provided on both sides of the groove 9. The two ends of the rotating frame 4 are rotatably connected to the arc-shaped grooves, and the gear ring 8 is mounted on the rotating frame 4. On the outer circumference of the rotating frame 4, the drive motor 6 is fixedly connected to the inside of the groove 9. The purpose of this arrangement is that during welding, the connection position of the pipe fitting 5 is placed above the groove 9, and at this time, the welding torch 2 is at the lowest end of the rotating frame 4, which is also the starting position. After the welding torch 2 is started and preheated at the welding position, the drive motor 6 is started. The drive motor 6 drives the gear 7 at its output end to rotate. Under the action of the gear 7 meshing with the gear ring 8, the rotating frame 4 can be driven to rotate. Since the welding torch 2 is fixedly connected to the rotating frame 4 through the mounting base 1, the welding torch 2 is driven to make a circular motion around the pipe fitting 5 while the rotating frame 4 is rotating, thereby realizing the automatic welding of the pipe fitting 5.

[0033] In another embodiment of the present invention, the error-proof mechanism includes a heat-conducting rod 10. A sealing cavity 11 is provided inside the mounting base 1. The welding torch 2 is slidably and sealingly connected to the sealing cavity 11. The heat-conducting rod 10 is disposed on the mounting base 1, with one end abutting against the pipe fitting 5, and the other end extending through the side wall of the mounting base 1 into the sealing cavity 11. Specifically, the heat-conducting rod 10 is made of a metal material with good thermal conductivity, is U-shaped, and its end located inside the sealing cavity 11 is located along the movement stroke of the welding torch 2. The sealed cavity 11 is filled with a gas with a high expansion coefficient. The purpose of this arrangement is that when the welding position is preheated by the welding torch 2, when the welding position reaches a temperature sufficient for welding, the heat will be transferred to the sealed cavity 11 through the heat conduction rod 10, causing the gas inside the sealed cavity 11 to expand. The gas will drive the welding torch 2 to move upward along the sealed cavity 11, thereby passively switching the welding torch 2 from the first position to the second position to realize the subsequent welding operation. After welding is completed, the temperature of the gas drops and it contracts, thereby driving the welding torch 2 to descend to achieve reset.

[0034] Furthermore, the sealing cavity 11 has a vent hole 12 and a sliding cavity 13 inside its side wall. One end of the vent hole 12 communicates with the sliding cavity 13, and the other end communicates with the sealing cavity 11. A locking block 14 is slidably disposed inside the sliding cavity 13. The welding torch 2 has a locking groove 15 adapted to the locking block 14. When the welding torch 2 is in the second position, the locking block 14 is inserted into the locking groove 15. Specifically, there are two sliding cavities 13 and two locking blocks 14, which are symmetrically arranged about the welding torch 2. The vent hole 12 and the sliding cavity 13 are arranged in a transverse U-shape. The purpose of this arrangement is that when the welding torch 2 is in the first position, its side wall blocks the sliding cavity 13 and the vent hole 12. When the welding torch 2 switches from the first position to the second position, the vent hole 12 is blocked. When the inlet end of the vent 12 is opened, the pressure inside the sealing cavity 11 is greater than the pressure inside the locking groove 15 due to the expansion of the gas. As a result, the locking block 14 slides into the locking groove 15 under the action of the gas pressure, so as to realize the insertion of the locking block 14 into the locking groove 15, thereby fixing the welding torch 2 in the second position and improving the stability of the welding torch 2 during welding. Conversely, after welding, the temperature of the sealing cavity 11 gradually decreases under the action of natural cooling or cooling mechanism such as a fan, so that the gas pressure inside the sealing cavity 11 is less than the gas pressure inside the locking groove 15. Therefore, the locking block 14 moves away from the locking groove 15 under the action of the gas pressure, thereby releasing the locking effect between the locking block 14 and the locking groove 15. The welding torch 2 automatically resets under its own gravity and gas pressure.

[0035] Furthermore, the welding torch 2 is provided with a sealing tube 16, which penetrates the bottom wall of the sealing cavity 11 and is dynamically sealed to the sealing cavity 11. Specifically, the sealing tube 16 is located at the bottom end of the welding torch 2 and extends to the outside of the mounting base 1. Its internal hollow channel can be used to provide materials such as welding wire.

[0036] Furthermore, the welding torch 2 includes a body 201 and a barrel 202 communicating with the body 201. A flow-dividing mechanism is provided on the barrel 202. When the welding torch 2 is in the first position, the flow-dividing mechanism is used to increase the preheating range of the welding torch 2. The flow-dividing mechanism includes a flow-dividing plate 17, and a through hole 18 is provided on the barrel 202. The flow-dividing plate 17 is rotatably disposed on the through hole 18. A second power assembly for driving the flow-dividing plate 17 to rotate is also included. Specifically, the body 201 is slidably connected to the sealing cavity 11. Preferably, there are four through holes 18, arranged in an array on the side wall of the barrel 202. The flow-dividing plate 17 is disposed on the side wall of the barrel. The arc-shaped structure of the sidewall of the 202 is adapted to the through hole 18. A rotating shaft 19 is provided in the middle of the through hole 18. The flow divider 17 can rotate vertically around the rotating shaft 19. The second power component is a motor or other mechanism that can drive the flow divider 17 to rotate. The purpose of this arrangement is that when the welding torch 2 is in the first position, the second power component drives the bottom end of the flow divider 17 to rotate in the direction of the central axis of the torch tube 202, thereby opening the through hole 18 and extending the bottom end of the flow divider 17 into the interior of the torch tube 202 to achieve the function of guiding the flow. This allows the heat generated by the welding torch 2 to be dispersed into multiple streams through the through hole 18 and then transferred to the surface of the welding position to increase the heating range of the welding torch 2.

[0037] Furthermore, a heat pipe 20 is provided on the flow divider 17. The heat pipe 20 is located on the side of the flow divider 17 away from the central axis of the gun barrel 202. It is made of heat-insulating material and its outlet end faces the welding position. When the through hole 18 is opened, heat will be transferred to the welding position through the heat pipe 20 to reduce heat loss during the transfer process.

[0038] Furthermore, it also includes a fixing mechanism for fixing the position of the pipe fitting 5. The fixing mechanism is a structure such as a cylinder and a clamping plate. The cylinder drives the movement of the clamping plate to achieve the fixing and loosening of the pipe fitting 5. This is existing technology and will not be described in detail.

[0039] In another embodiment of the present invention, the second power assembly includes a traction wire 21. A groove 22 is provided on the mounting base 1. A transmission rod 23 is slidably disposed within the groove 22, and a spring 24 is provided between the transmission rod 23 and the bottom wall of the groove 22. The two ends of the traction wire 21 are respectively connected to the lower half of the diverter plate 17 (i.e., the part below the rotating shaft 19) and the top end of the transmission rod 23. A torsion spring (not shown in the figure) is provided between the rotating shaft 19 and the diverter plate 17. Specifically, the groove 22 is divided into a first section 2201 and a second section 2202. The first section 2201 is located above the second section 2202, and the radial dimension of the first section 2201 is greater than... The radial dimension of the second segment 2202 and the radial dimension of the transmission rod 23 are adapted to the radial dimension of the first segment 2201. The two ends of the spring 24 are fixed to the bottom end of the transmission rod 23 and the inner bottom wall of the second segment 2202, respectively. The elastic force of the torsion spring causes the bottom end of the flow divider 17 to have a tendency to rotate towards the central axis of the barrel 202. The spring constant of the torsion spring is less than that of the spring constant of the spring 24. The purpose of this arrangement is that when the welding torch 2 is in the first position, the transmission rod 23 is at the bottom end of the first segment 2201. Since the radial dimension of the first segment 2201 is greater than that of the second segment 2202 and the spring constant of the torsion spring is less than that of the spring constant of the spring 24, the transmission rod 23 cannot continue along the first segment 2201. As the torch slides downwards, spring 24 has no effect on transmission rod 23. Under the action of the torsion spring, the bottom end of the flow divider 17 rotates towards the central axis of the barrel 202, thereby opening the through hole 18 to increase the preheating range of the welding torch 2. When the welding torch 2 switches from the first position to the second position, it slides upwards relative to the sealing cavity 11. Under the tension of the traction wire 21, the flow divider 17 rotates in the opposite direction (and a limiting structure is provided at the connection between the flow divider 17 and the through hole 18 to prevent excessive rotation). When the flow divider 17 completely blocks the through hole 18, the limiting structure prevents it from continuing to rotate. Therefore, as the welding torch 2 continues to slide upwards relative to the sealing cavity 11, the flow divider... Under the action of the traction wire 21, the transmission rod 23 is pulled to slide outward of the first section 2201, and the spring 24 is stretched to match the upward movement distance of the welding torch 2. During the upward movement of the welding torch 2, the stretching distance of the spring 24 increases, and the pulling force on the diverter plate 17 is also greater, so that the diverter plate 17 and the through hole 18 are more tightly attached, thereby improving the sealing performance of the diverter plate 17. Conversely, when the welding torch 2 moves downward relative to the sealing cavity 11, when the welding torch 2 returns to the first position, the elastic force of the spring 24 is released, which causes the transmission rod 23 to slide to the bottom of the first section 2201. At this time, the pulling force of the transmission rod 23 on the traction wire 21 disappears, and the through hole 18 is reopened under the action of the torsion spring.

[0040] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic welding device for high-temperature alloys, comprising a mounting base, characterized in that, The mounting base is equipped with a welding torch. The welding torch has a first position for preheating and a second position for welding; The mounting base is equipped with a foolproof mechanism. When the welding position is not preheated, the welding torch is fixed in the first position. After the welding position is preheated, the foolproof mechanism moves the welding torch from the first position to the second position. It also includes a machine base, on which a rotating frame is provided, and the mounting base is fixedly connected to the rotating frame; It also includes a first power assembly for driving the rotating frame to rotate; The foolproof mechanism includes a heat-conducting rod, and the mounting base has a sealed cavity inside. The welding torch is slidably and sealedly connected to the sealed cavity. The heat-conducting rod is disposed on the mounting base, and one end of the heat-conducting rod abuts against the pipe fitting. The other end of the heat-conducting rod passes through the side wall of the mounting base and extends into the sealed cavity.

2. The high-temperature alloy automatic welding device according to claim 1, characterized in that, The first power assembly includes a drive motor and a gear fixedly connected to the output end of the drive motor. A gear ring is provided on the outer circumferential surface of the rotating frame. The drive motor is fixedly connected to the machine base, and the gear meshes with the gear ring.

3. The high-temperature alloy automatic welding device according to claim 1, characterized in that, The sealing cavity has an air guide hole and a sliding cavity in its side wall. One end of the air guide hole is connected to the sliding cavity, and the other end of the air guide hole is connected to the sealing cavity. A locking block is slidably disposed in the sliding cavity. The welding torch has a locking groove that matches the locking block. When the welding torch is in the second position, the locking block is inserted into the locking groove.

4. The high-temperature alloy automatic welding device according to claim 3, characterized in that, The welding torch is equipped with a sealing tube that penetrates the bottom wall of the sealing cavity and is dynamically sealed to the sealing cavity.

5. The high-temperature alloy automatic welding device according to claim 1, characterized in that, The welding torch includes a body and a barrel connected to the body. The barrel is provided with a flow-dividing mechanism. When the welding torch is in the first position, the flow-dividing mechanism is used to increase the preheating range of the welding torch.

6. The automatic welding device for high-temperature alloys according to claim 5, characterized in that, The flow splitting mechanism includes a flow splitting plate, and the gun barrel has a through hole, with the flow splitting plate rotatably mounted on the through hole; It also includes a second power assembly for driving the splitter plate to rotate.

7. The high-temperature alloy automatic welding device according to claim 6, characterized in that, The distributor plate is equipped with heat pipes.

8. The high-temperature alloy automatic welding device according to claim 1, characterized in that, It also includes a fixing mechanism for fixing the position of pipe fittings.

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