Channel welding device and method

Abstract

The invention discloses a channel welding device and method, and relates to the field of welding equipment.The channel welding device comprises a tool fixing part and an outer pressing tool, the tool fixing part comprises a tool platform and an outer pressing tool, the tool platform is provided with an inner supporting shaft core guide and an inner tool core shaft, and the periphery of the inner tool core shaft is provided with an inner tool core shaft expansion block in a telescopic mode; the inner tool mandrel expansion block is matched with the inner side molded surface of the splicing angle of the channel; the rotary welding part comprises a welding machine head and a roller carrier, a channel internally provided with an inner tool mandrel in a penetrating mode is rotationally arranged on the roller carrier, and the welding machine head slides outside the channel in the length direction of the channel; the electric control part is in control connection with the tool fixing part and the rotary welding part; by the adoption of the welding device, heat at the welding seam of the splicing angle can be eliminated in a water cooling mode in the welding process, meanwhile, a channel is fixed in an inner supporting and outer pressing mode through the inner tool mandrel expansion block and the outer pressing tool, it is guaranteed that a workpiece does not deform in the welding process, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the field of welding equipment, and more specifically, relates to a channel welding device and a welding method. Background Art

[0002] The automated welding method and tooling device for channel shells are mainly used for the production and manufacturing of channel products. Most of the existing channel products are welded using manual assembly, welding, welding and other processes, which have low production efficiency and unstable quality. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies in the prior art and to provide a channel welding device and a welding method. The welding device can eliminate heat at the joint fillet weld through water cooling during welding. At the same time, the channel is fixed with internal support and external pressure through the internal tooling core shaft expansion block and the external pressure tooling, thereby ensuring that the workpiece does not deform during welding. Automatic welding of the welding head replaces manual welding, thereby improving production efficiency.

[0004] In order to achieve the above object, the present invention provides a channel welding device, the channel is composed of four metal plates spliced ​​together, including: The tool fixing part includes a tool platform and an external pressure tool. The tool platform is provided with an inner support shaft core guide and an inner tool core shaft along the length direction. The inner tool core shaft can be slidably arranged in the inner support shaft core guide. The outer periphery of the inner tool core shaft is telescopically provided with an inner tool core shaft expansion block. The inner tool core shaft expansion block matches the inner side profile of the splicing angle of the channel. The rotating welding part includes a welding head and a roller frame, wherein a channel having the inner tooling mandrel passing therethrough is rotatably arranged on the roller frame, and the welding head slides outside the channel along its length direction; The electric control part is control-connected with the tool fixing part and the rotating welding part.

[0005] Optionally, the inner tooling mandrel comprises: The mandrel body has a core-pulling guide wheel disposed on its outer periphery, the core-pulling guide wheel is in rolling contact with the inner wall of the channel, and the inner tooling mandrel expansion blocks are respectively disposed on the four edges of the mandrel body; A driving gear is arranged at one end of the mandrel body, and a driven wheel is arranged at the other end of the mandrel body; A pneumatic connecting rod mechanism is arranged on the mandrel body, and the pneumatic connecting rod mechanism is connected to the inner tooling mandrel expansion block; A water-gas quick plug is arranged on the mandrel body, and the water-gas quick plug is connected to the inner tooling mandrel expansion block; A positioning cooling mechanism is arranged on the mandrel body, and the positioning cooling mechanism is connected to the inner tooling mandrel expansion block.

[0006] Optionally, the positioning cooling mechanism comprises: A connecting piece, arranged at the root of the inner tooling mandrel expansion block; A cooling copper block is arranged on the head of the inner tooling mandrel expansion block, and a protective air pipe is also arranged on the head of the inner tooling mandrel expansion block; A cooling water pipe, which runs through the connecting piece and is connected to the cooling copper block; The outer periphery of the inner tooling mandrel expansion block is a positioning surface, and the positioning surface matches the inner side profile of the splicing angle of the channel.

[0007] Optionally, the pneumatic connecting rod mechanism comprises: A base, arranged on the mandrel body; The cylinder is arranged on the base, and the driving end of the cylinder is connected to the connecting piece through a straight connecting rod, and a floating joint is arranged at the end of the straight connecting rod.

[0008] Optionally, a winch is also provided on the tooling platform, the output end of the winch is connected to the inner tooling core shaft, the inner support shaft core guide is two nylon positioning blocks arranged at intervals, and the sides of the nylon positioning blocks close to each other are in contact with the outer surface of the channel.

[0009] Optionally, the roller frame includes an active side roller frame and a driven side roller frame, the active side roller frame includes a roller base plate, rollers and gears are arranged on the roller base plate, the servo motor is meshed with the driving gear through the gear, the active side roller frame is connected to the active side pressure wheel frame through a column, the rollers on the active side roller frame and the rollers on the active side pressure wheel frame are rollingly fitted with the inner tooling core shaft, the rollers of the driven side roller frame are rollingly fitted with the driven wheel, and a conductive carbon brush is arranged between the rollers.

[0010] Optionally, the external pressure tooling on the outer periphery of the channel is connected and fixed by a pull rod.

[0011] Optionally, a pair of slide rails are provided on the welding base, and the slide rails are respectively arranged on both sides of the rotating roller frame, an operating machine column is slidably arranged on the slide rails, a crossbeam is provided on the operating machine column, a drag chain is provided on the crossbeam, the moving end of the drag chain is connected to the welding head, and a wire feeding mechanism is also provided on the crossbeam. The height and horizontal positions of the welding head are controlled by the electronic control part.

[0012] The present invention also provides a channel welding method, using the channel welding device, the welding method comprises: placing the spot-welded channel in the inner support shaft core guide; Move the inner tooling mandrel to the interior of the channel, and extend the inner tooling mandrel expansion block to contact the inner wall of the channel; Hoist the channel with the inner tooling mandrel onto the roller frame, and connect the air pipe and water pipe on the inner tooling mandrel accordingly; Install the external pressure tooling on the outside of the channel in sequence; The cooling water, compressed air and protective gas are conducted to the joint corners of the channel through the inner tooling mandrel expansion block, and at the same time, under the action of the compressed air, the push rods of the cylinders at various locations extend to tighten the joint corners, and the channel is welded by the welding head, and the channel is rotated by the electric control part; After welding is completed, the external pressure tooling on the channel is removed, and the welded channel is hoisted into the inner support shaft core guide, and the inner tooling core shaft expansion block is retracted; The inner tooling mandrel is disengaged from the completed welded channel.

[0013] Optionally, the welding head performs welding from the driven side to the active side of the roller frame on the channel, and cooling water flows from the active side to the driven side of the roller frame on the channel. The driven side and active side of the roller frame are respectively provided with an arc-starting plate and an arc-extinguishing plate.

[0014] The present invention provides a channel welding device and a welding method, which have the following beneficial effects: the channel welding device uses two sets of hot wire TIG external longitudinal seam welding systems as welding machine heads to achieve symmetrical welding of the channel joint angles, speed up the production cycle, and use an internal tooling mandrel and an external pressure tooling to fix the channel fixed by spot welding, so as to avoid the situation where the relative position of the workpiece changes during welding, improve the weld quality and the aesthetic appearance of the forming, and the channel welded by the welding device has a flatness error of each panel not exceeding 2mm / m 2 The flatness error over the entire length does not exceed 3mm, the verticality tolerance of the two adjacent and vertical surfaces of the channel shell is 3mm / m, the welds on the channel are tested PT-100% according to NB / T47013.2, and the result is qualified as Level I, and there are no defects such as undercut and unfusion on the outer surface.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0017] Figure 1 A schematic structural diagram of a channel according to an embodiment of the present invention is shown.

[0018] Figure 2 Shows Figure 1 Schematic cross-section of .

[0019] Figure 3 A schematic structural diagram of a tool fixing part according to an embodiment of the present invention is shown.

[0020] Figure 4 A schematic diagram showing a state in which a channel with an inner tooling mandrel is placed on a roller frame according to an embodiment of the present invention is shown.

[0021] Figure 5 A schematic structural diagram of an inner tooling mandrel according to an embodiment of the present invention is shown.

[0022] Figure 6 A schematic diagram showing a state where an external pressure tooling is installed on a channel according to an embodiment of the present invention is shown.

[0023] Figure 7 A schematic diagram of the installation state of a long side external pressing tool according to an embodiment of the present invention is shown.

[0024] Figure 8 A schematic diagram of the installation state of a short-side external pressing tool according to an embodiment of the present invention is shown.

[0025] Fig. 9 A schematic diagram of the connection between the inner tooling core shaft and the active side roller frame and the active side pressure wheel frame according to an embodiment of the present invention is shown.

[0026] Fig.10 A schematic diagram of the connection between the inner tooling mandrel and the driven side roller frame according to an embodiment of the present invention is shown.

[0027] Fig.11 A schematic structural diagram of an active side roller frame according to an embodiment of the present invention is shown.

[0028] Fig.12 A schematic structural diagram of an active side pressure wheel frame according to an embodiment of the present invention is shown.

[0029] Fig.13 A schematic structural diagram of a driven side roller frame according to an embodiment of the present invention is shown.

[0030] Fig.14 A cross-sectional schematic diagram showing an inner tooling mandrel and an external pressure tooling installed on a channel according to an embodiment of the present invention is shown.

[0031] Fig.15 A schematic diagram showing the state of a welding head welding a channel weld according to an embodiment of the present invention is shown.

[0032] Fig.16 A structural schematic diagram of a positioning cooling mechanism according to an embodiment of the present invention is shown.

[0033] Fig.17 A schematic structural diagram of a pneumatic connecting rod mechanism according to an embodiment of the present invention is shown.

[0034] Fig.18 A schematic diagram showing the positions of the inner tooling mandrel and the channel according to an embodiment of the present invention is shown.

[0035] Fig.19 A schematic diagram showing an inner tooling mandrel expansion block in a contracted state according to an embodiment of the present invention is shown.

[0036] Fig. 20 A schematic diagram showing an inner tooling mandrel expansion block in an extended state according to an embodiment of the present invention is shown.

[0037] Fig.21 A schematic structural diagram of a rotating welding part according to an embodiment of the present invention is shown.

[0038] Fig. 22 A connection schematic diagram of a welding head according to an embodiment of the present invention is shown.

[0039] Description of reference numerals: 1. Channel; 2. Metal plate; 3. Tooling platform; 4. Internal support shaft core guide; 5. Internal tooling mandrel; 6. Internal tooling mandrel expansion block; 7. Welding machine head; 8. Mandrel body; 9. Pull-out guide wheel; 10. Driving gear; 11. Driven wheel; 12. Pneumatic connecting rod mechanism; 13. Water-gas quick-connect connector; 14. Positioning cooling mechanism; 15. Connecting piece; 16. Cooling copper block; 17. Protective air pipe; 18. Cooling water pipe; 19. Positioning surface; 20. Base; 21. Cylinder; 22. Straight connecting rod; 23. Floating joint; 24. Winch; 25. Nylon positioning block; 26. Active side roller frame; 27. Driven side roller frame; 28. Roller base plate; 29. ​​Roller; 30. Gear; 31. Servo motor; 32. Column; 33. Active side pressure roller frame; 34. Conductive carbon brush; 35. Pull rod; 36. Welding base; 37. Slide rail; 38. Manipulator column; 39. Crossbeam; 40. Drag chain; 41. Wire feeding mechanism; 42. Welding seam; 43. Long side external pressure tooling; 44. Short side external pressure tooling. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0041] The present invention provides a channel welding device, the channel is composed of four metal plates spliced ​​together, including: The tooling fixed part includes a tooling platform and an external pressure tooling. The tooling platform is provided with an inner support shaft core guide and an inner tooling core shaft in the length direction. The inner tooling core shaft can be slidably arranged in the inner support shaft core guide. The outer periphery of the inner tooling core shaft is telescopically provided with an inner tooling core shaft expansion block. The inner tooling core shaft expansion block matches the inner side profile of the splicing angle of the channel. The rotating welding part includes a welding head and a roller frame, wherein a channel with an inner tooling mandrel is rotatably arranged on the roller frame, and the welding head slides outside the channel along its length direction; The electric control part is controlled and connected with the tooling fixed part and the rotating welding part.

[0042] Specifically, the welding device includes a tool fixing part, a rotating welding part and an electronic control part. The four metal plates fixed by spot welding are placed in the inner support shaft core guide to achieve preliminary positioning of the channel, and then the inner tool core shaft is inserted into the channel to provide simple support for the inside of the channel. Next, the channel is transferred to the roller frame, so that the inner tool core shaft and the roller frame can be connected to each other in a rolling manner. With the rotation cooperation of the roller frame, the external pressure tool is installed on the outside of the channel. With the dual cooperation of the inner tool core shaft supporting from the inside to the outside and the external pressure tooling tightening from the outside to the inside, the relative welding positions of the four metal plates in the channel are stable and accurate. Finally, the splicing angles of the channel are welded in turn through the welding head. During the entire fixing and welding process of the channel, the electronic control part can control the movement of the inner tool core shaft, the extension and retraction of the inner tool core shaft expansion block, the rotation of the roller frame and the welding of the welding head to achieve automatic welding of the channel.

[0043] Optionally, the inner tooling mandrel comprises: The mandrel body has a core-pulling guide wheel arranged on its outer periphery, the core-pulling guide wheel is in rolling contact with the inner wall of the channel, and inner tooling mandrel expansion blocks are arranged on the four edges of the mandrel body respectively; A driving gear is arranged at one end of the mandrel body, and a driven wheel is arranged at the other end of the mandrel body; A pneumatic connecting rod mechanism is arranged on the mandrel body, and the pneumatic connecting rod mechanism is connected with the inner tooling mandrel expansion block; A water-gas quick plug is arranged on the mandrel body and is connected to the inner tooling mandrel expansion block; The positioning cooling mechanism is arranged on the mandrel body and is connected with the inner tooling mandrel expansion block.

[0044] Specifically, the inner tooling mandrel is inserted into the channel after being placed in the inner support shaft core guide. The core-pulling guide wheel on the outer periphery of the mandrel body is convenient for rolling in and out of the channel, and before the inner tooling mandrel expansion block is extended, the channel can be simply supported internally; driving gears and driven wheels are respectively provided at both ends of the mandrel body. When the channel with the inner tooling mandrel is hoisted onto the roller frame, the driving gear and the driven wheel are correspondingly connected to the roller frame, and under the control of the electronic control part, the channel is driven to rotate, which facilitates the installation of external pressure tooling and welding machine heads on the outer surface of the channel; a pneumatic connecting rod mechanism and a positioning cooling mechanism are also provided on the mandrel body, which can drive the telescopic movement of the inner tooling mandrel expansion block. When the inner tooling mandrel expansion block extends outward and fits the splicing angle of the channel, the welding point is cooled by the coolant and the inner tooling mandrel expansion block. During welding, the protective gas can be quickly and accurately delivered to the welding point to improve the welding quality.

[0045] Optionally, the positioning cooling mechanism comprises: A connecting piece, arranged at the root of the inner tooling mandrel expansion block; A cooling copper block is arranged on the head of the inner tooling mandrel expansion block, and a protective air pipe is also arranged on the head of the inner tooling mandrel expansion block; A cooling water pipe runs through the connector and is connected to the cooling copper block; The outer periphery of the inner tooling mandrel expansion block is a positioning surface, and the positioning surface matches the inner side profile of the splicing angle of the channel.

[0046] Specifically, in the positioning and cooling mechanism, a connecting piece is provided at one end of the inner tooling mandrel expansion block away from the side wall of the channel, and the connecting piece can be telescopically driven by a straight connecting rod and a cylinder; a cooling copper block is also provided at the end of the inner tooling mandrel expansion block close to the side wall of the channel, and a protective air pipe and a cooling water pipe are provided on the cooling copper block. During welding, the temperature of the cooling water can be transferred to the splicing corner of the channel through the cooling copper block, and the protective gas is also delivered to the welding point; when the inner tooling mandrel expansion block extends outward, the positioning surface support of the inner tooling mandrel expansion block is fitted on the inner side of the metal plate, so that the inner tooling mandrel expansion block cooperates with the external pressure tooling to ensure the clamping and accurate positioning of the metal plate.

[0047] Optionally, the pneumatic linkage mechanism comprises: A base, arranged on the mandrel body; The cylinder is arranged on the base, and the driving end of the cylinder is connected to the connecting piece through a straight connecting rod, and a floating joint is arranged at the end of the straight connecting rod.

[0048] Specifically, bases are respectively arranged on the four corners of the core shaft body, and cylinders are arranged on the bases. In this way, the electronic control part can realize the telescopic control of the inner tooling core shaft expansion block by controlling the operation of the cylinder. In addition, a floating joint is arranged on the straight connecting rod to reduce the precision requirements and extend the service life of the telescopic structure.

[0049] Optionally, a winch is also provided on the tooling platform, the output end of the winch is connected to the inner tooling core shaft, the inner support shaft core guide is two nylon positioning blocks arranged at intervals, and the sides of the nylon positioning blocks close to each other fit the outer surface of the channel.

[0050] Specifically, when the channel initially fixed by spot welding is placed in the inner support shaft core guide, the horizontal position of the channel is limited by the nylon positioning blocks on both sides, and then the inner tooling core shaft is pulled into the channel by the traction of the winch, thereby realizing the electrical control installation of the inner tooling core shaft.

[0051] Optionally, the roller frame includes an active side roller frame and a driven side roller frame, the active side roller frame includes a roller base plate, rollers and gears are arranged on the roller base plate, the servo motor is meshed with the driving gear through the gear, the active side roller frame is connected to the active side pressure roller frame through the column, the rollers on the active side roller frame and the rollers on the active side pressure roller frame are rollingly fitted with the inner tooling core shaft, the rollers of the driven side roller frame are rollingly fitted with the driven wheels, and conductive carbon brushes are arranged between the rollers.

[0052] Specifically, when the channel with the inner tooling core shaft is placed on the roller frame, the driving gear and the gear are meshed for transmission, and the driven wheel rolls and fits with the roller of the driven side roller frame; when the servo motor drives the driving gear to rotate, the gear on the active side roller frame can drive the inner tooling core shaft to rotate through the driving gear, so that the channel can be rotated, and the external pressure tooling can only be installed on the upper surface of the channel, and then the external pressure tooling is fixed to the channel, and then the channel continues to rotate, and then the external pressure tooling is continued to be installed on the upper surface of the rotated channel. Repeating the above operations can realize the installation and fixation of four external pressure toolings on the outer periphery of the channel; after the channel with the inner tooling core shaft is placed on the roller frame, an active side pressure wheel frame is also installed above the active side roller frame, and the driving gear can be limited and transmitted through the upper and lower clamping cooperation of the active side roller frame and the active side pressure wheel frame; a conductive carbon brush is also arranged on the roller frame, which can conduct electricity to the inner tooling core shaft during rotation, so as to facilitate the telescopic control of the inner tooling core shaft expansion block.

[0053] Optionally, the external pressure tooling on the outer periphery of the channel is connected and fixed by a pull rod.

[0054] Specifically, after the roller frame drives the inner tooling mandrel for one circle, the external pressure tooling can be installed on the four surfaces of the channel in turn, and then the four external pressure tooling parts are connected and fixed by a pull rod, so that the external pressure tooling fits tightly to the outside of the channel, and cooperates with the inner tooling mandrel and the expansion block extending out of the inner tooling mandrel, so that the channel can achieve the fixing effect of internal support and external pressure.

[0055] Optionally, a pair of slide rails are provided on the welding base, and the slide rails are respectively provided on both sides of the rotating roller frame, an operating machine column is slidably provided on the slide rails, a crossbeam is provided on the operating machine column, a drag chain is provided on the crossbeam, the moving end of the drag chain is connected to the welding head, and a wire feeding mechanism is also provided on the crossbeam. The height and horizontal position of the welding head are controlled by the electronic control part.

[0056] Specifically, after the positions of the four metal plates of the channel are fixed, one plane of the channel is facing upward, and then the position of the welding head is adjusted, and then the welding of the splicing angle is started, while welding and moving along the slide rail. At the same time, the protective gas pipe transports protective gas to the welding point and the cooling water pipe transports cooling water to the cooling copper block to improve the welding effect.

[0057] The present invention also provides a channel welding method, using the channel welding device, the welding method comprises: Place the spot welded channel in the inner support shaft core guide; Move the inner tooling mandrel to the inside of the channel, and extend the inner tooling mandrel expansion block to contact the inner wall of the channel; Lift the channel with the inner tooling mandrel onto the roller frame, and connect the air pipe and water pipe on the inner tooling mandrel accordingly; Install the external pressure tooling on the outside of the channel in sequence; The cooling water, compressed air and protective gas are conducted to the joint corners of the channel through the inner tooling mandrel expansion block. At the same time, under the action of compressed air, the push rods of the cylinders at various locations extend to tighten the joint corners, and the channel is internally shaped. The channel is welded with a welding machine head, and the channel is rotated by the electronic control part. After welding is completed, the external pressure tooling on the channel is removed, and the welded channel is hoisted into the inner support shaft core guide, and the inner tooling core shaft expansion block is retracted; Disengage the inner tooling mandrel from the completed welded channel.

[0058] Optionally, the welding head welds from the driven side to the active side of the roller frame on the channel, and cooling water flows from the active side to the driven side of the roller frame on the channel. The driven side and active side of the roller frame are respectively provided with an arc striking plate and an arc extinguishing plate.

[0059] Specifically, when welding the splicing angle through the welding head, the welding head moves from the driven side to the active side, and the flow direction of the cooling water is from the active side to the driven side. This can ensure the cooling effect of the weld, and arc striking plates and arc extinguishing plates are respectively set at the starting point and the ending point to ensure that all parameters are stable when welding on the channel. Example

[0060] like Figures 1 to 22 As shown, the present invention provides a channel welding device, the channel 1 is composed of four metal plates 2 spliced ​​together, the cross section of the channel 1 is rectangular, and includes: The tool fixing part includes a tool platform 3 and an external pressure tool. The tool platform 3 is provided with an inner support shaft core guide 4 and an inner tool core shaft 5 along the length direction. The inner tool core shaft 5 can be slidably arranged in the inner support shaft core guide 4. The outer periphery of the inner tool core shaft 5 is telescopically provided with an inner tool core shaft expansion block 6. The inner tool core shaft expansion block 6 matches the inner side profile of the splicing angle of the channel 1. The external pressure tool includes a long side external pressure tool 43 and a short side external pressure tool 44. The rotating welding part includes a welding head 7 and a roller frame, a channel 1 with an inner tooling mandrel 5 passing through it is rotatably arranged on the roller frame, and the welding head 7 slides outside the channel 1 along its length direction; The electric control part is controlled and connected with the tooling fixed part and the rotating welding part.

[0061] In this embodiment, the inner tooling mandrel 5 comprises: The mandrel body 8 is provided with a core-pulling guide wheel 9 on its outer periphery. The core-pulling guide wheel 9 is in rolling contact with the inner wall of the channel 1. The four edges of the mandrel body 8 are respectively provided with inner tooling mandrel expansion blocks 6. A driving gear 10 is provided at one end of the mandrel body 8, and a driven wheel 11 is provided at the other end of the mandrel body 8; A pneumatic connecting rod mechanism 12 is arranged on the mandrel body 8, and the pneumatic connecting rod mechanism 12 is connected to the inner tooling mandrel expansion block 6; The water-gas quick-plug connector 13 is arranged on the mandrel body 8, and the water-gas quick-plug connector 13 is connected to the inner tooling mandrel expansion block 6; The positioning and cooling mechanism 14 is arranged on the mandrel body 8 , and the positioning and cooling mechanism 14 is connected to the inner tooling mandrel expansion block 6 .

[0062] In this embodiment, the positioning cooling mechanism 14 includes: The connecting member 15 is arranged at the root of the inner tooling mandrel expansion block 6; A cooling copper block 16 is arranged on the head of the inner tooling mandrel expansion block 6, and a protective air pipe 17 is also arranged on the head of the inner tooling mandrel expansion block 6; A cooling water pipe 18 passes through the connector 15 and is connected to the cooling copper block 16; The outer periphery of the inner tooling mandrel expansion block 6 is a positioning surface 19 , and the positioning surface 19 matches the inner side profile of the splicing angle of the channel 1 .

[0063] In this embodiment, the pneumatic connecting rod mechanism 12 includes: A base 20 is provided on the mandrel body 8; The cylinder 21 is disposed on the base 20 , and the driving end of the cylinder 21 is connected to the connecting member 15 via a straight connecting rod 22 , and a floating joint 23 is disposed at the end of the straight connecting rod 22 .

[0064] In this embodiment, a winch 24 is also provided on the tooling platform, the output end of the winch 24 is connected to the inner tooling core shaft 5, and the inner supporting shaft core guide 4 is two nylon positioning blocks 25 arranged at intervals, and the side of the nylon positioning blocks 25 close to each other fits with the outer surface of the channel 1.

[0065] In this embodiment, the roller frame includes an active side roller frame 26 and a driven side roller frame 27. The active side roller frame 26 includes a roller base plate 28, on which rollers 29 and gears 30 are arranged. The servo motor 31 is meshed with the driving gear 10 through the gear 30. The active side roller frame 26 is connected to the active side pressure roller frame 33 through the column 32. The rollers 29 on the active side roller frame 26 and the rollers on the active side pressure roller frame 33 are rollingly fitted with the inner tooling core shaft 5. The rollers of the driven side roller frame 27 are rollingly fitted with the driven wheel 11, and conductive carbon brushes 34 are arranged between the rollers.

[0066] In this embodiment, the long side external pressing tool 43 and the short side external pressing tool 44 on the outer periphery of the channel 1 are connected and fixed by a pull rod 35 .

[0067] In this embodiment, a pair of slide rails 37 are provided on the welding base 36, and the slide rails 37 are respectively arranged on both sides of the rotating channel 1. An operating machine column 38 is slidably arranged on the slide rails 37, and a crossbeam 39 is provided on the operating machine column 38. A drag chain 40 is provided on the crossbeam 39. The moving end of the drag chain 40 is connected to the welding head 7. A wire feeding mechanism 41 is also provided on the crossbeam 39. The height and horizontal positions of the welding head 7 are controlled by the electronic control part.

[0068] The present invention also provides a channel welding method, using the channel welding device, the welding method comprises: Place the spot-welded channel 1 in the inner support shaft core guide 4; Move the inner tooling mandrel 5 to the inside of the channel 1, and extend the inner tooling mandrel expansion block 6 to contact the inner wall of the channel 1; Lift the channel 1 with the inner tooling mandrel 5 onto the roller frame, and connect the air pipe and water pipe on the inner tooling mandrel 5 accordingly; Install the external pressure tooling on the outside of channel 1 in sequence; The cooling water, compressed air and protective gas are conducted to the joint corner of the channel through the inner tooling mandrel expansion block 6. At the same time, under the action of the compressed air, the push rods of the cylinders at various locations extend to tighten the joint corner. The welding machine head 7 is used to weld the weld 42 of the channel 1, and the channel 1 is rotated by the electric control part. After welding is completed, the external pressure tooling on the channel 1 is removed, and the welded channel is hoisted into the inner support shaft core guide 4, and the inner tooling core shaft expansion block 6 is retracted; The inner tooling mandrel 5 is separated from the welded channel 1 .

[0069] In this embodiment, the welding head 7 welds from the driven side to the active side of the roller frame on the channel, and the cooling water flows from the active side to the driven side of the roller frame on the channel. The driven side and the active side of the roller frame are respectively provided with an arc starting plate and an arc extinguishing plate.

[0070] In summary, the welding process of the channel welding device is as follows: first, the spot-welded channel 1 is hoisted onto the tooling platform 3 and placed between two rows of nylon positioning blocks 25, so that the channel 1 can be limited in the horizontal direction by the inner support shaft core guide 4; the inner tooling mandrel 5 is pulled into the channel 1 on the tooling platform 3 by the winch 24 until the channel contacts the end face positioning plate of the inner tooling mandrel 5, so that the inner tooling mandrel 5 and the channel 1 are installed in place; the inner tooling mandrel expansion block 6 is pushed outward by the pneumatic connecting rod mechanism 12 The inner tooling mandrel 5 is fixed in the channel 1 by the positioning surface 19 and the inner side of the metal plate 2; the channel 1 with the inner tooling mandrel 5 is hoisted to the rotating welding part, the driving gear 10 and the active side roller frame 26 are meshed and connected with each other, the driven wheel 11 and the driven side roller frame 27 are rolled and fitted, and then the active side pressure wheel frame 33 is connected to the active side roller frame 26 to ensure that the inner tooling mandrel 5 and the channel 1 can achieve stable rotation under the drive of the servo motor 31; the inner tooling mandrel 5 is hoisted to the rotating welding part, the driving gear 10 and the active side roller frame 26 are meshed and connected with each other, the driven wheel 11 and the driven side roller frame 27 are rolled and fitted, and then the active side pressure wheel frame 33 is connected to the active side roller frame 26. The compressed air, protective gas, cooling water and electrical aviation plug interfaces at the end of shaft 5 are connected accordingly, and arc-starting plates and arc-extinguishing plates are welded at both ends of the four welds 42 of channel 1; the corresponding external pressure tooling is installed on the top surface of channel 1, and then low-pressure compressed air is introduced into the external pressure tooling to fix channel 1 to the external pressure tooling. Next, channel 1 is rotated by servo motor 31. After turning 180°, the corresponding external pressure tooling is installed on the plane currently facing upward, and low-pressure compressed air is also introduced into the external pressure tooling. Next, The channel 1 is rotated 90° and 180° to complete the installation and fixation of the external pressure fixtures on the other two surfaces. Finally, the long-side external pressure fixture 43 and the short-side external pressure fixture 44 are connected and fixed by the pull rod 35, so that the entire external pressure fixture is pressed against the outer periphery of the channel 1; cooling water is transported to the cooling copper block 16 through the cooling water pipe 18 to cool the weld 42. At the same time, shielding gas is output to the weld 42 through the shielding gas pipe 17 to supply shielding gas to the back of the metal plate groove. The welding preparation work is completed. The welding head 7 is controlled by the electric control part so that the welding head 7 is welded from the driven side roller frame 27 to the active side roller frame 26. After welding two welds 42 on a plane, the channel 1 is rotated 180°, the original protective gas pipe 17 is closed, and the protective gas pipe 17 on the side to be welded is opened, and the protective gas continues to be supplied to the weld 42, thereby completing the welding of the last two welds 42; when all four welds 42 are welded, the cooling water, protective gas and compressed gas are turned off; by rotating the channel 1, the two long side external pressure fixtures 43 and the one short side external pressure fixture 44 are removed in turn, and the other short side external pressure fixture 44 that has not been removed is set upward, and the channel 1 with the short side external pressure fixture 44 is hoisted back to the fixture platform 3, and then the short side external pressure fixture 44 is removed; the inner fixture mandrel expansion block 6 is retracted by the pneumatic connecting rod mechanism 12, and then the inner fixture mandrel 5 is pulled out of the channel 1 by the winch.Finally, the weld quality of the welded channel 1 is inspected. Once the welding requirements are met, the channel can be transferred to the next process.

[0071] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A channel welding device, characterized in that: The channel is composed of four metal plates. The welding device includes: The tool fixing part includes a tool platform and an external pressure tool. The tool platform is provided with an inner support shaft core guide and an inner tool core shaft along the length direction. The inner tool core shaft can be slidably arranged in the inner support shaft core guide. The outer periphery of the inner tool core shaft is telescopically provided with an inner tool core shaft expansion block. The inner tool core shaft expansion block matches the inner side profile of the splicing angle of the channel. The rotating welding part includes a welding head and a roller frame, wherein a channel having the inner tooling mandrel passing therethrough is rotatably arranged on the roller frame, and the welding head slides outside the channel along its length direction; The electric control part is control-connected with the tool fixing part and the rotating welding part.

2. The channel welding device according to claim 1, characterized in that: The inner tooling mandrel comprises: The mandrel body has a core-pulling guide wheel disposed on its outer periphery, the core-pulling guide wheel is in rolling contact with the inner wall of the channel, and the inner tooling mandrel expansion blocks are respectively disposed on the four edges of the mandrel body; A driving gear is arranged at one end of the mandrel body, and a driven wheel is arranged at the other end of the mandrel body; A pneumatic connecting rod mechanism is arranged on the mandrel body, and the pneumatic connecting rod mechanism is connected to the inner tooling mandrel expansion block; A water-gas quick plug is arranged on the mandrel body, and the water-gas quick plug is connected to the inner tooling mandrel expansion block; A positioning cooling mechanism is arranged on the mandrel body, and the positioning cooling mechanism is connected to the inner tooling mandrel expansion block.

3. The channel welding device according to claim 2, characterized in that: The positioning cooling mechanism comprises: A connecting piece, arranged at the root of the inner tooling mandrel expansion block; A cooling copper block is arranged on the head of the inner tooling mandrel expansion block, and a protective air pipe is also arranged on the head of the inner tooling mandrel expansion block; A cooling water pipe, which runs through the connecting piece and is connected to the cooling copper block; The outer periphery of the inner tooling mandrel expansion block is a positioning surface, and the positioning surface matches the inner side profile of the splicing angle of the channel.

4. The channel welding device according to claim 3, characterized in that: The pneumatic connecting rod mechanism comprises: A base, arranged on the mandrel body; The cylinder is arranged on the base, and the driving end of the cylinder is connected to the connecting piece through a straight connecting rod, and a floating joint is arranged at the end of the straight connecting rod.

5. The channel welding device according to claim 1, characterized in that: A winch is also provided on the tooling platform, the output end of the winch is connected to the inner tooling core shaft, the inner support shaft core guide is two nylon positioning blocks arranged at intervals, and the sides of the nylon positioning blocks close to each other are in contact with the outer surface of the channel.

6. The channel welding device according to claim 2, characterized in that: The roller frame includes an active side roller frame and a driven side roller frame, the active side roller frame includes a roller base plate, rollers and gears are arranged on the roller base plate, the servo motor is meshed with the driving gear through the gear, the active side roller frame is connected with the active side pressure wheel frame through a column, the rollers on the active side roller frame and the rollers on the active side pressure wheel frame are rollingly fitted with the inner tooling core shaft, the rollers of the driven side roller frame are rollingly fitted with the driven wheel, and a conductive carbon brush is arranged between the rollers.

7. The channel welding device according to claim 1, characterized in that: The external pressure tooling on the outer periphery of the channel is connected and fixed by a pull rod.

8. The channel welding device according to claim 1, characterized in that: It also includes a welding base, which is provided with a pair of slide rails, which are respectively arranged on both sides of the rotating roller frame, an operating machine column is slidably arranged on the slide rails, the operating machine column is provided with a crossbeam, a drag chain is provided on the crossbeam, the moving end of the drag chain is connected to the welding head, and a wire feeding mechanism is also provided on the crossbeam. The height and horizontal positions of the welding head are controlled by the electronic control part.

9. A channel welding method, using the channel welding device according to any one of claims 1 to 8, characterized in that: The welding method includes: placing the spot-welded channel in the inner support shaft core guide; Move the inner tooling mandrel to the interior of the channel, and extend the inner tooling mandrel expansion block to contact the inner wall of the channel; Hoist the channel with the inner tooling mandrel onto the roller frame, and connect the air pipe and water pipe on the inner tooling mandrel accordingly; Install the external pressure tooling on the outside of the channel in sequence; The cooling water, compressed air and protective gas are conducted to the joint corners of the channel through the inner tooling mandrel expansion block, and at the same time, under the action of the compressed air, the push rods of the cylinders at various locations extend to tighten the joint corners, and the channel is welded by the welding head, and the channel is rotated by the electric control part; After welding is completed, the external pressure tooling on the channel is removed, and the welded channel is hoisted into the inner support shaft core guide, and the inner tooling core shaft expansion block is retracted; The inner tooling mandrel is disengaged from the completed welded channel.

10. The channel welding method according to claim 9, characterized in that: The welding head performs welding from the driven side to the active side of the roller frame on the channel, and cooling water flows from the active side to the driven side of the roller frame on the channel. The driven side and the active side of the roller frame are respectively provided with an arc starting plate and an arc extinguishing plate.

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