Impedance type composite silencer welding device

Abstract

The invention relates to an impedance type composite silencer welding device, and relates to the technical field of welding devices, the impedance type composite silencer welding device comprises a workbench, two sliding plates arranged on the workbench and a moving assembly driving the sliding plates to move in the X direction and the Y direction, a pre-fixed silencer body is horizontally and rotatably installed on the workbench, the number of the sliding plates is two, and the sliding plates are arranged on the workbench. The two sliding plates correspond to the two ends of the silencer body correspondingly, and a supporting assembly for positioning and supporting the silencer body, a welding assembly for welding the silencer body and an air cooling assembly for cooling the silencer body are arranged on the workbench. The silencer has the advantages that the welding quality of the silencer body is improved, the silencing performance of the silencer body is improved, and the service life of the silencer body is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of welding devices, and in particular to an impedance composite muffler welding device. Background Art

[0002] Impedance composite silencer is a silencer device that combines the characteristics of resistive silencer and reactive silencer. It can effectively eliminate high, medium and low frequency noise at the same time and has wide-band silencer characteristics, such as the common cylindrical micro-perforated plate silencer, which is widely used in industry, transportation, construction and other fields.

[0003] Reference Figure 1 When processing the common cylindrical micro-perforated silencer, the metal sheet is often cut by a laser cutting machine, and then further processed by punching equipment, rolling equipment, etc. to obtain a cylindrical outer shell, a cylindrical microporous inner cylinder and a partition with a through hole for the microporous inner cylinder to pass through. Then the technician coaxially sleeves the outer shell on the microporous inner cylinder, and seals the cavity between the outer shell and the microporous inner cylinder with the partition. At this time, the two ends of the microporous inner cylinder protrude from the outer shell. Then the technician coaxially fixes the two flanges on the opposite ends of the microporous inner cylinder, and pre-fixes the outer shell, microporous inner cylinder, partition and flange by riveting or welding. Then the connection parts are completely riveted or welded to realize the assembly of the muffler. If riveting is used, the technician also needs to apply sealant at the connection of the plates.

[0004] Regarding the above-mentioned related technologies, when fixed by riveting, due to the difference in expansion coefficients between the metal plate and the sealant, during long-term operation, the alternating hot and cold external environment can easily cause inconsistent deformation of the two, triggering interface stress concentration, resulting in tearing, debonding of the sealant or gaps between the sealant and the metal plate; when fixed by welding, since the metal plate of the muffler body is relatively thin, a slightly larger welding power can easily weld through the metal plate to form holes, and a slightly smaller welding power can easily cause slag inclusions, pores or incomplete welding, reducing the quality of the weld. The above problems will affect the airtightness of the muffler. When the muffler is working, turbulence is easily generated at the leakage point, causing excessive wind erosion of the microporous inner tube and reducing the muffler performance of the muffler. At the same time, leakage can easily cause pressure fluctuations, causing vibration fatigue or even fracture of the microporous inner tube, affecting the service life of the muffler, so there is room for improvement. Summary of the invention

[0005] In order to improve the welding quality of the muffler body and improve the muffler performance and service life of the muffler body, the present application provides an impedance composite muffler welding device.

[0006] The impedance composite muffler welding device provided in this application adopts the following technical solution: An impedance composite muffler welding device includes a workbench, a sliding plate disposed on the workbench, and a moving assembly for driving the sliding plate to move along the X and Y directions. The pre-fixed muffler body is horizontally rotatably mounted on the workbench. There are two sliding plates, and the two sliding plates respectively correspond to the two ends of the muffler body. A support assembly for positioning and supporting the muffler body, a welding assembly for welding the muffler body, and an air-cooling assembly for cooling the muffler body are provided on the workbench; The support assembly includes a support seat disposed on the workbench and a movable seat slidably disposed on the workbench. Fixed disks are rotatably provided on both the support seat and the movable seat. The two flanges of the pre-fixed muffler body are respectively in movable contact with the side walls of the two fixed disks close to each other, and the two flanges are respectively detachably and fixedly connected coaxially with the two fixed disks. A rotating assembly for driving the fixed disk on one side of the support seat to rotate is provided on the workbench; The welding assembly includes a welding torch disposed on the horizontal side of the muffler body, and the output end of the welding torch is arranged towards the outer peripheral wall of the muffler body. The other end of the welding torch extends obliquely downward to the side away from the muffler body. An adjusting member for adjusting the inclination angle of the welding torch is provided on the sliding plate. A mounting plate is rotatably provided on the sliding plate, and the welding torch is rotatably connected to the mounting plate. A driving member for driving the mounting plate to rotate, a swinging member for making the welding torch swing periodically, and a sliding member for adjusting the swing amplitude of the welding torch are also provided on the workbench.

[0007] By adopting the above technical solution, when welding is required, the technician transports the pre-fixed muffler body to the workbench, makes the flange on one side of the muffler body fit with the side wall of the fixed disk on one side of the support seat close to each other, and then the technician slides the movable seat close to the support seat, makes the fixed disk on one side of the movable seat fit with the side wall of the other flange close to each other, and fixes the flange and the fixed disk to achieve the positioning and support of the muffler body.

[0008] The technician adjusts the inclination angle of the welding torch by operating the adjusting member according to the plate thickness of the muffler body, that is, adjusts the walking angle of the welding torch. By adjusting the walking angle of the welding torch, the penetration depth of the molten pool during welding is adjusted, and the risk of welding through the muffler body is reduced.

[0009] Then, the moving component drives the sliding plate to slide, causing the welding torch to move to the connection between the flange and the microporous inner cylinder. Then, the welding torch operates. At this time, the working angle of the welding torch is 90°. Meanwhile, the rotating component drives the corresponding fixed disk to rotate, realizing the rotation of the muffler body, and making the output end of the welding torch face the front of the welding molten pool, achieving butt welding of the flange and the microporous inner cylinder. And the welding method is vertical welding with leftward welding. Since the output end of the welding torch faces the front of the molten pool, the heat input to the molten pool is reduced, thereby reducing the penetration depth of the molten pool and lowering the risk of welding through the muffler body. At the same time, the welding torch preheats the front of the molten pool. And due to the use of vertical welding, the surface tension and gravity of the molten pool are balanced, reducing the risk of deformation at the welding joint.

[0010] Meanwhile, during welding, the swinging component drives the welding torch to swing periodically, causing the output end of the welding torch to move away from / close to the outer peripheral wall of the muffler body periodically, realizing skip arc welding, reducing the risk of welding through the muffler body caused by concentrated heat input, improving the welding quality of the muffler body, enhancing the airtightness of the muffler body, and thus improving the sound absorption performance and service life of the muffler body.

[0011] Then, the moving component drives the sliding plate to slide in a direction away from the muffler body. At this time, the driving component drives the mounting plate to rotate 45°, thereby causing the welding torch to rotate 45°. Then, the moving component drives the sliding plate to slide, causing the welding torch to move to the connection between the microporous inner cylinder and the partition plate. Then, the welding torch operates. At this time, the working angle of the welding torch is 45°. Meanwhile, the rotating component drives the corresponding fixed disk to rotate, realizing the rotation of the muffler body, achieving fillet welding of the microporous inner cylinder and the partition plate, and thus realizing the adjustment of the working angle of the welding torch during butt welding and fillet welding, improving the welding quality at different positions.

[0012] Then, the moving component drives the sliding plate to slide, causing the welding torch to move to the connection between the partition plate and the outer shell. Then, the welding torch and the rotating component operate to achieve fillet welding of the partition plate and the outer shell. At the same time, since the weld length between the partition plate and the outer shell is longer than the weld length between the partition plate and the microporous inner cylinder, the welding time is long, and heat input is likely to accumulate, resulting in a local temperature rise, generating large thermal stress, and increasing the risk of cracks and deformation at the weld. At this time, the sliding component adjusts the swing amplitude of the welding torch, increasing the distance that the output end of the welding torch moves away from the outer peripheral wall of the muffler body periodically, thereby reducing heat input and improving the welding quality of the muffler body.

[0013] During welding, the air-cooling component cools the muffler body, accelerating the heat dissipation at the weld, shortening the high-temperature residence time, reducing thermal stress, and lowering the risks of welding through the muffler body and deformation of the muffler body caused by large thermal stress.

[0014] Optionally, the air-cooling assembly includes an air suction cylinder coaxially arranged on the fixed disk on one side of the movable seat. The air suction cylinder is movably attached to the side wall of the fixed disk on one side of the support seat that is close to each other. The outer peripheral wall of the air suction cylinder is evenly provided with flow holes. The diameter of the middle part of the air suction cylinder is smaller than the diameters of both ends of the air suction cylinder, and the diameter change of the air suction cylinder is smoothly transitioned. The middle part of the air suction cylinder corresponds to the microporous part of the microporous inner cylinder. A heat exchange cavity is formed between the air suction cylinder and the microporous inner cylinder. The fixed disk is provided with a communication port communicating with the inside of the air suction cylinder and an air inlet communicating with the inside of the heat exchange cavity. A blower is communicated at the communication port of the fixed disk on one side of the support seat.

[0015] By adopting the above technical solution, during welding, the blower works to drive the gas to enter and exit the air suction cylinder through the communication ports on the fixed disks on both sides, thereby forming a negative pressure in the air suction cylinder, causing the external gas to enter the heat exchange cavity from the air inlets on the fixed disks on both sides, and then being sucked into the air suction cylinder through the flow holes, thus driving the flow of the gas in the heat exchange cavity, realizing the cooling of the muffler body, reducing the range of the heat-affected zone, reducing welding deformation, and the gas enters the heat exchange cavity from both sides, making the air-cooling efficiency on both sides of the muffler body consistent, thereby ensuring the consistency of the welds on both sides.

[0016] When welding the partition plate and the microporous inner cylinder, since the microporous part of the microporous inner cylinder changes the heat conduction path, the heat needs to bypass the micropores during heat conduction, reducing the heat transfer efficiency. At the same time, due to the sound-absorbing characteristics of the microporous inner cylinder, when the gas flows in the heat exchange cavity, the gas generates heat energy by rubbing against the pore wall to achieve sound absorption, and the micropore size is small, making the convective heat dissipation effect of the air not obvious, easily causing the temperature of the microporous part of the microporous inner cylinder to rise, increasing the temperature gradient on both sides of the weld, and easily causing the weld to deform due to thermal stress. At this time, since the diameter of the part of the air suction cylinder corresponding to the microporous part of the microporous inner cylinder is smaller than the diameters of both ends of the air suction cylinder, the gas flow velocity at the part of the air suction cylinder corresponding to the microporous part of the microporous inner cylinder increases, making the gas at the microporous part of the microporous inner cylinder enter the air suction cylinder faster, improving the heat dissipation effect of the microporous part of the microporous inner cylinder, and reducing the deformation of the weld due to the temperature difference.

[0017] Optionally, the air-cooling assembly further includes heat absorption plates elastically and slidably arranged on the air suction cylinder. There are multiple heat absorption plates, and the multiple heat absorption plates are evenly arranged at intervals along the circumferential direction of the air suction cylinder. The heat absorption plates are arc-shaped and are movably abutted against the inner peripheral wall of the microporous inner cylinder.

[0018] By adopting the above technical solution, the heat absorption plates are abutted against the inner peripheral wall of the microporous inner cylinder under the elastic force. During welding, the heat absorption plates absorb the heat during welding, and then through the gas flow, the heat of the heat absorption plates is taken away, improving the heat dissipation efficiency. And when butt welding the flange and the microporous inner cylinder, the heat absorption plates are abutted against the inner peripheral wall of the microporous inner cylinder, making the heat absorption plates act as welding backing plates, which can reduce the risk of collapse on the back of the weld and improve the quality of the weld.

[0019] Meanwhile, the heat absorption plate set by elastic sliding facilitates the technician to coaxially insert the air suction cylinder and the heat absorption plate into the muffler body when supporting the muffler body.

[0020] Optionally, the adjusting member includes an adjusting block rotatably disposed on the mounting plate. The axis of rotation of the adjusting block is consistent with that of the welding torch, and the adjusting block is located above the welding torch. The side wall of the welding torch is in movable abutment with the bottom wall of the adjusting block. An elastic member for abutting the welding torch against the adjusting block is provided on the mounting plate. An adjusting screw is threadedly disposed on the mounting plate. The adjusting screw is arranged along the radius direction of the rotation axis of the adjusting block and is in movable abutment with the outer peripheral wall of the rotation axis of the adjusting block.

[0021] By adopting the above technical solution, before welding, the technician turns the adjusting screw to make the adjusting block rotate freely. Then, the technician adjusts the rotation of the adjusting block according to the thickness of the plate of the muffler body and tightens the adjusting screw to make the adjusting screw abut against the adjusting block, so as to fix the adjusting block. At this time, the welding torch abuts against the adjusting block under the action of the elastic member and maintains a constant relative position with the adjusting block, thereby realizing the rapid adjustment of the walking angle of the welding torch and facilitating the operation of the technician.

[0022] Optionally, the swinging member includes a pressing wheel rotatably and slidably disposed on the mounting plate. The outer peripheral wall of the pressing wheel is in movable abutment with the side wall of the welding torch. A wheel disc is rotatably disposed on the mounting plate. A connecting rod is rotatably connected to the side wall of the wheel disc. One end of the connecting rod away from the wheel disc is rotatably connected to the rotation axis of the pressing wheel. A swinging gear is coaxially provided on the wheel disc and is located on the side of the wheel disc away from the connecting rod. A driving gear is rotatably disposed on the mounting plate. The driving gear is meshed with the swinging gear. A first power member for driving the driving gear to rotate is further provided on the mounting plate.

[0023] By adopting the above technical solution, during welding, the first power member drives the driving gear to rotate, thereby driving the swinging gear and the wheel disc to rotate, and further driving the connecting rod to rotate around the rotation axis of the wheel disc. Since one end of the connecting rod away from the wheel disc is rotatably connected to the pressing wheel and the pressing wheel is slidably connected to the mounting plate, the connecting rod drives the pressing wheel to reciprocate, and the outer peripheral wall of the pressing wheel periodically abuts against the side wall of the welding torch, driving the welding torch to rotate, separating the welding torch from the adjusting block, and driving the welding torch to reverse under the drive of the elastic member, so that the welding torch abuts against the adjusting block, thereby driving the welding torch to reciprocate and realizing skip arc welding. Compared with directly driving the pressing wheel to reciprocate by a cylinder or an electric push rod, the above solution has high running stability. At the same time, compared with a multi-axis welding robot, the structure is simple, which is convenient for technicians to operate and reduces the equipment cost.

[0024] Optionally, the sliding member includes a sliding lead screw rotatably provided on the side wall of the turntable. A lead screw nut is also slidably provided on the side wall of the turntable, and the lead screw nut slides along the radial direction of the turntable. The lead screw nut is in threaded fit with the sliding lead screw. The connecting rod is rotatably connected to the side wall of the lead screw nut away from the turntable. A driving bevel gear is rotatably provided coaxially on the turntable. One end of the sliding lead screw close to the driving bevel gear is coaxially provided with a driven bevel gear. The driving bevel gear meshes with the driven bevel gear. A second power member for driving the driving bevel gear to rotate is provided on the turntable.

[0025] By adopting the above technical solution, when it is necessary to adjust the distance between the output end of the welding torch and the outer peripheral wall of the muffler body periodically, the second power member drives the driving bevel gear to rotate, drives the driven bevel gear and the sliding lead screw to rotate, so as to drive the lead screw nut to slide along the radial direction of the turntable. Furthermore, when adjusting the sliding distance of the pressing wheel driven by the connecting rod when the connecting rod rotates around the turntable, the swing amplitude of the welding torch can be adjusted. Compared with directly adjusting the stroke of the air cylinder or the electric push rod to drive the welding torch to swing periodically and adjust the swing amplitude of the welding torch, the above solution can ensure that the swing period of the welding torch is not easy to change while adjusting the swing amplitude of the welding torch, thereby improving the welding quality.

[0026] Optionally, the driving member includes a driving worm gear coaxially provided on the rotating shaft of the mounting plate, and the driving worm gear is located at the bottom of the sliding plate. A driving worm is rotatably provided on the side wall of the sliding plate close to the driving worm gear. The driving worm meshes with the driving worm gear. A switching gear is coaxially provided on the driving worm. A switching rack is provided on the workbench. The switching rack is movably meshed with the switching gear.

[0027] By adopting the above technical solution, after the muffler body is positioned and supported, at this time, the switching gear is located at the position corresponding to the switching rack. The moving assembly drives the sliding plate to slide towards the direction close to the outer peripheral wall of the muffler body, so that the switching gear meshes with the switching rack, thereby driving the switching rack to drive the switching gear and the driving worm to rotate, and then driving the driving worm gear to rotate, realizing the rotation of the mounting plate until the switching gear is separated from the switching rack. At this time, the mounting plate rotates 45°. And due to the self-locking of the worm and worm gear, the relative position between the mounting plate and the sliding plate is kept constant. At this time, the working angle of the welding torch is 90°. Then the sliding plate continues to slide, so that the welding torch moves to the connection between the flange and the micro-hole inner cylinder.

[0028] When welding is required at the connection between the micro-hole inner cylinder and the partition plate, the moving assembly drives the sliding plate to slide away from the outer peripheral wall of the muffler body, realizing the reverse rotation of the mounting plate until the switching gear is separated from the switching rack. At this time, the mounting plate rotates reversely by 45°, and the working angle of the welding torch is 45°. Then the moving assembly drives the sliding plate to move, so that the welding torch moves to the connection between the micro-hole inner cylinder and the partition plate.

[0029] When welding is required at the connection between the partition plate and the outer housing, the moving component drives the sliding plate to move, so that the welding torch moves to the connection between the partition plate and the outer housing. At this time, the mounting plate and the sliding plate maintain a constant relative position, and the working angle of the welding torch remains at 45°.

[0030] Through the above solution, the synchronous coordination of the rotation of the mounting plate and the sliding of the sliding plate is realized, so that when welding different positions of the muffler body, the synchronous switching of the working angle of the welding torch is realized, the coordination of the equipment operation is improved, and the power source is saved.

[0031] Optionally, a thermal imaging ranging module for monitoring the output end of the welding torch and the molten pool is provided on the welding torch, a controller is provided on the workbench, and a displacement sensor for monitoring the sliding distance of the sliding plate in the direction of approaching / leaving the muffler body is provided. The thermal imaging ranging module, the displacement sensor, the first power component, the second power component, the rotating component and the moving component are all electrically connected to the controller.

[0032] By adopting the above technical solution, the distance between the output end of the welding torch and the outer peripheral wall of the muffler body is monitored by the thermal imaging ranging module, and an electrical signal is transmitted to the controller. At the same time, the controller controls the working of the moving component, thereby improving the position accuracy between the welding torch and the outer peripheral wall of the muffler body.

[0033] During welding, the thermal imaging ranging module monitors the flow pattern and temperature of the molten pool at the welding position. When the fluidity of the molten pool is too strong, the temperature is too high, or the fluidity of the molten pool is too poor and the temperature is too low, the thermal imaging ranging module transmits an electrical signal to the controller. At this time, the controller controls the second power component to work, realizes the adjustment of the swing amplitude of the welding torch, thereby realizing the real-time adjustment of the heat input of the welding torch during welding, reducing the risk of welding through the muffler body, and further improving the welding quality of the muffler body. For example, when welding the partition plate and the outer housing, the welding position is far from the heat absorption plate. At this time, the heat dissipation efficiency is poor, the weld seam is long, it is easy to cause the accumulation of heat input, and it is easy for the temperature of the molten pool to be too high and the fluidity to be too strong.

[0034] After the moving component stops working, the displacement sensor monitors the sliding distance of the sliding plate in the direction of approaching / leaving the muffler body, so as to obtain the outer diameter of the position to be welded on the muffler body at this time, and transmits an electrical signal to the controller. At this time, the controller controls the first power component and the rotating component to work, and adjusts the first power component and the rotating component according to the outer diameter information of the position to be welded on the muffler body, so that the rotation speed of welding different positions of the muffler body is adapted to the frequency of the reciprocating swing of the welding torch, improves the welding quality of different positions of the muffler body, and at the same time realizes the automatic control of the welding process and improves the welding efficiency.

[0035] Optionally, the support assembly further includes support wheels rotatably arranged on the workbench. There are multiple groups of the support wheels, and the multiple groups of support wheels are evenly arranged at intervals along the axial direction of the suction cylinder. Each group of support wheels includes two support wheels arranged on both sides of the suction cylinder, and the outer peripheral wall of the support wheel is movably attached to the outer peripheral wall of the outer housing.

[0036] By adopting the above technical solution, when welding is required, the technician transports the pre-fixed muffler body to the support wheels and makes the outer peripheral wall of the outer housing fit with the outer peripheral wall of the support wheels to achieve the support of the muffler body. When the fixed disk rotates and drives the muffler body to rotate, the rotation stability of the muffler body is improved, and at the same time, the pre-fixed position of the muffler body is not easily separated under the action of the rotational torque and gravity.

[0037] In summary, the present application includes at least one of the following beneficial technical effects: 1. During welding, the rotating assembly drives the fixed disk and the muffler body to rotate, making the output end of the welding torch face the front of the welding molten pool, realizing vertical welding of the left welding method for the muffler body. Since the output end of the welding torch faces the front of the molten pool, the heat input to the molten pool is reduced, thereby reducing the penetration depth of the molten pool and lowering the risk of welding through the muffler body. At the same time, the welding torch preheats the front of the molten pool, and due to vertical welding, the surface tension of the molten pool is balanced with gravity, reducing the risk of deformation at the welding joint. At the same time, the swinging member drives the welding torch to swing periodically, making the output end of the welding torch periodically move away from / approach the outer peripheral wall of the muffler body, realizing skip arc welding, reducing the risk of welding through the muffler body caused by concentrated heat input, improving the welding quality of the muffler body, improving the airtightness of the muffler body, and thus improving the sound absorption performance and service life of the muffler body; 2. When the fan works, it drives the gas to enter the heat exchange cavity from both sides, making the air cooling efficiency on both sides of the muffler body consistent, thereby ensuring the consistency of the welds on both sides. At the same time, since the micro-hole inner cylinder realizes sound absorption by the friction between the gas and the hole wall, and the micro-hole size is small, the convective heat dissipation effect of the air is not obvious, and it is easy to form a temperature difference on both sides of the weld at the welding joint between the micro-hole inner cylinder and the partition plate, causing the weld to deform due to thermal stress. At this time, the diameter of the suction cylinder corresponding to the micro-hole part of the micro-hole inner cylinder is smaller than the diameters at both ends of the suction cylinder, and the gas flow velocity of the corresponding part of the suction cylinder and the micro-hole part of the micro-hole inner cylinder increases, improving the heat dissipation effect of the micro-hole part of the micro-hole inner cylinder and reducing the risk of deformation of the weld due to the temperature difference; 3. The heat absorption plate abuts against the inner peripheral wall of the micro-hole inner cylinder under the elastic force. During welding, the heat absorption plate absorbs the heat during welding and then, through gas flow, takes away the heat of the heat absorption plate, improving the heat dissipation efficiency. When butt welding the flange and the micro-hole inner cylinder, the heat absorption plate abuts against the inner peripheral wall of the micro-hole inner cylinder, making the heat absorption plate act as a welding backing plate, reducing the risk of collapse on the back of the weld and improving the quality of the weld; 4. When the moving component drives the sliding plate to slide, the switching gear is engaged with the switching rack, and the switching rack drives the switching gear and the driving worm to rotate, thereby driving the driving worm gear to rotate, realizing the rotation of the mounting plate. And due to the self-locking of the worm and worm gear, the relative position between the mounting plate and the sliding plate is kept constant, so as to realize the synchronous switching of the working angle of the welding torch when butt welding or fillet welding different positions of the muffler body, improve the operation coordination of the equipment, and save the power source; 5. During welding, the flow pattern and temperature of the molten pool at the welding position are monitored by the thermal imaging ranging module, and the electrical signal is transmitted to the controller. At this time, the controller controls the second power component to work, realizing the adjustment of the swing amplitude of the welding torch, so as to realize the real-time adjustment of the heat input of the welding torch during welding, reduce the risk of welding through the muffler body, and further improve the welding quality of the muffler body. Description of the Drawings

[0038] Figure 1 is the overall structural schematic diagram of the muffler body; Figure 2 is the overall structural schematic diagram of the embodiment of the present application; Figure 3 is the connection structural schematic diagram of the welding torch, the mounting plate, the sliding plate and the workbench; Figure 4 is the connection structural schematic diagram of the welding torch, the adjusting block, the wheel disc and the mounting plate; Figure 5 is the state schematic diagram of the welding torch, the mounting plate and the sliding plate in the fillet welding state; Figure 6 is the connection structural schematic diagram of the suction cylinder and the fixed disk; Figure 7 is the connection structural schematic diagram of the heat absorption plate and the suction cylinder.

[0039] Reference numerals: 1, workbench; 11, thermal imaging ranging module; 12, displacement sensor; 13, controller; 2, sliding plate; 3, welding assembly; 31, welding torch; 32, mounting plate; 33, adjusting member; 331, adjusting block; 332, adjusting screw; 333, dial; 334, indicating line; 34, swinging member; 341, pressing wheel; 342, wheel disc; 343, connecting rod; 344, swinging gear; 345, driving gear; 346, first power member; 35, sliding member; 351, sliding lead screw; 352, lead screw nut; 353, driving bevel gear; 354, driven bevel gear; 355, second power member; 36, driving member; 361, driving worm gear; 362, driving worm; 363, switching gear; 364, switching rack; 4, air-cooling assembly; 41, suction cylinder; 42, through hole; 43, heat exchange chamber; 44, communication port; 45, air inlet; 46, heat absorption plate; 5, support assembly; 51, support base; 52, movable seat; 53, fixed disk; 54, support wheel; 6, rotating assembly; 61, driving pulley; 62, driven pulley; 63, transmission belt; 64, third power member; 7, moving assembly; 8, muffler body; 81, outer housing; 82, micro-hole inner cylinder; 83, partition plate; 84, flange. Detailed implementation mode

[0040] The following is a further detailed description of the present application in conjunction with the attached Figure 1-7 drawings.

[0041] An impedance composite muffler welding device is disclosed in an embodiment of the present application. Referring to Figure 1 and Figure 2 , an impedance composite muffler welding device includes a workbench 1 horizontally fixed on the ground, and a pre-fixed muffler body 8 is rotatably installed on the workbench 1. In the present application, the muffler body 8 is pre-fixed by manual spot welding, and a support assembly 5 for positioning and supporting the muffler body 8 is arranged on the workbench 1.

[0042] Referring to Figure 2 , the support assembly 5 includes a support base 51 fixed on the workbench 1 and a movable seat 52 slidably connected to the workbench 1. The sliding direction of the movable seat 52 is consistent with the length direction of the workbench 1. Fixed disks 53 are rotatably connected to both the support base 51 and the movable seat 52. The two fixed disks 53 are arranged opposite to each other. The rotation axis of the fixed disk 53 is consistent with the length direction of the workbench 1. The two flanges 84 of the pre-fixed muffler body 8 are respectively in movable contact with the side walls of the two fixed disks 53 close to each other, and the two flanges 84 are coaxial with the two fixed disks 53 and are detachably fixedly connected to the fixed disks 53 through bolts and nuts.

[0043] In order to improve the stability of the support for the muffler body 8, referring to Figure 2, the support assembly 5 further includes a plurality of support wheels 54 rotatably connected to the workbench 1. The plurality of support wheels 54 are arranged at equal intervals along the length direction of the workbench 1. Each group of support wheels 54 includes two support wheels 54 arranged opposite to each other. The rotation axis of the support wheel 54 is parallel to the rotation axis of the fixed disk 53. The outer peripheral wall of the support wheel 54 is movably attached to the outer peripheral wall of the outer housing 81. In this application, there are two groups of support wheels 54. In other embodiments, according to the size of the outer housing 81, the support wheels 54 can also be set to three groups, five groups, eight groups or other multiple groups, as long as the arrangement method is the same as that of this application.

[0044] When welding the muffler body 8, the technician hoists the muffler body 8 pre-fixed by spot welding to the workbench 1 through a crane, and makes the outer peripheral wall of the outer housing 81 fit with the outer peripheral wall of the support wheel 54. Then, the technician pushes the movable seat 52 to slide close to the support seat 51, so that the fixed disk 53 on one side of the movable seat 52 fits with the side wall of the corresponding flange 84 that approaches each other, and the two flanges 84 and the fixed disk 53 are fixed in sequence by bolts and nuts, realizing the positioning and support of the muffler body 8. When the fixed disk 53 rotates and drives the muffler body 8 to rotate, the rotation stability of the muffler body 8 is improved, and at the same time, the muffler body 8 is not easily separated from the spot welding position due to the action of the rotational torque and gravity.

[0045] Further, a sliding plate 2 is slidably connected to the workbench 1, and a moving assembly 7 for driving the sliding plate 2 to slide in the X and Y directions. The length direction of the workbench 1 is the X direction, and the width direction of the workbench 1 is the Y direction. There are two sliding plates 2, and the two sliding plates 2 are arranged at intervals along the length direction of the workbench 1 and correspond to the two ends of the muffler body 8 respectively.

[0046] The moving assembly 7 includes a first sliding guide rail slidably connected to the workbench 1 and a moving plate fixed to the first connecting guide rail. The sliding direction of the first sliding guide rail is consistent with the width direction of the workbench 1. A second sliding guide rail is slidably connected to the moving plate, and the sliding plate 2 is fixed to the second sliding guide rail. The sliding direction of the second sliding guide rail is consistent with the length direction of the workbench 1. A first moving cylinder is fixed to the workbench 1, and the output end of the first moving cylinder is connected to the moving plate. A second moving cylinder is fixed to the moving plate, and the output end of the second moving cylinder is connected to the sliding plate 2. By driving the moving plate and the second sliding guide rail to slide through the first moving cylinder, the Y-direction movement of the sliding plate 2 is realized. By driving the sliding plate 2 to slide through the second moving cylinder, the X-direction movement of the sliding plate 2 is realized.

[0047] In order to weld the muffler body 8 and improve the welding quality, a welding assembly 3 is provided on the workbench 1. Refer to Figure 2 and Figure 3, the welding assembly 3 includes a welding torch 31 disposed on the horizontal side of the muffler body 8, and the output end of the welding torch 31 is arranged towards the outer peripheral wall of the muffler body 8. The other end of the welding torch 31 extends obliquely downward to the side away from the muffler body 8. A mounting plate 32 is rotatably provided on the sliding plate 2. The rotation axis of the mounting plate 32 is consistent with the height direction of the workbench 1. The welding torch 31 is rotatably connected to the mounting plate 32, and the rotation axis of the welding torch 31 is horizontally arranged.

[0048] In order to drive the fixed disk 53 on one side of the support seat 51 to rotate and realize the rotation of the muffler body 8, a rotation assembly 6 is provided on the workbench 1. Refer to Figure 2 , the rotation assembly 6 includes a driven belt pulley coaxially fixed on the fixed disk 53 on one side of the support seat 51. A driving belt pulley 61 is rotatably provided on the workbench 1. The rotation axis of the driving belt pulley 61 is parallel to the rotation axis of the driving belt pulley 61. A transmission belt 63 is connected between the driving belt pulley 61 and the driven belt pulley 62. A third power member 64 is fixedly connected to the workbench 1. The output end of the third power member 64 is connected to the driving belt pulley 61. In this application, the third power member 64 is a rotating motor.

[0049] In order to adjust the inclination angle of the welding torch 31 and realize the adjustment of the travel angle of the welding torch 31, an adjusting member 33 is provided on the sliding plate 2. Refer to Figure 4 , the adjusting member 33 includes an adjusting block 331 rotatably connected to the mounting plate 32. The rotation axis of the adjusting block 331 is consistent with the rotation axis of the welding torch 31, and the adjusting block 331 is located above the welding torch 31. The side wall of the welding torch 31 is in movable abutment with the bottom wall of the adjusting block 331. An elastic member for pressing the welding torch 31 against the adjusting block 331 is provided on the mounting plate 32. In this application, the elastic member is a return torsion spring. A scale disk 333 is inlaid and fixed on the mounting plate 32. The scale disk 333 is arc-shaped and coaxially arranged with the rotating shaft of the adjusting block 331. An indicating line 334 is fixed on the adjusting block 331. An adjusting screw 332 is threadedly connected to the mounting plate 32. The adjusting screw 332 is horizontally arranged and is arranged along the radius direction of the rotating shaft of the adjusting block 331 and is in movable abutment with the outer peripheral wall of the rotating shaft of the adjusting block 331.

[0050] In order to drive the mounting plate 32 to rotate, a driving member 36 is provided on the workbench 1. Refer to Figure 3 and Figure 4, the driving member 36 includes a driving worm gear 361 coaxially fixed to the rotating shaft of the mounting plate 32, and the driving worm gear 361 is located at the bottom of the sliding plate 2. A driving worm 362 is also rotatably connected to the bottom of the sliding plate 2. The rotation axis of the driving worm 362 is consistent with the width direction of the workbench 1. The driving worm 362 meshes with the driving worm gear 361. A switching gear 363 is coaxially fixed on the driving worm 362. A switching rack 364 is fixed on the workbench 1. The switching rack 364 corresponds to the connection between the micro-hole inner cylinder 82 and the flange 84. The switching rack 364 is movably meshed with the switching gear 363.

[0051] To achieve the automatic control of welding and improve the welding efficiency, referring to Figure 4 and Figure 5 , a thermal imaging ranging module 11 for monitoring the output end of the welding torch 31 and the molten pool is fixed at the bottom of the welding torch 31. In this application, the thermal imaging ranging module 11 is an infrared thermal imager integrated with a laser ranging sensor. A controller 13 and a displacement sensor 12 for monitoring the sliding distance of the sliding plate 2 in the Y direction are fixed on the workbench 1. The thermal imaging ranging module 11, the displacement sensor 12, the third power member 64, and the moving assembly 7 are all electrically connected to the controller 13.

[0052] After positioning and supporting the muffler body 8, the technician turns the adjusting screw 332 to make the adjusting block 331 rotate freely. Then, according to the plate thickness of the muffler body 8, the technician rotates the adjusting block 331 to make the indicating line 334 on the adjusting block 331 align with the specified scale on the alignment scale disk 333, and tightens the adjusting screw 332 to make the adjusting screw 332 press against the adjusting block 331 to fix the adjusting block 331. At this time, the welding torch 31 presses against the adjusting block 331 under the action of the elastic member and maintains a constant relative position with the adjusting block 331, thereby realizing the rapid adjustment of the traveling angle of the welding torch 31, which is convenient for the technician to operate.

[0053] Then the technician starts the equipment. The controller 13 controls the moving assembly 7 to work, driving the sliding plate 2 to slide close to the muffler body 8 in the Y direction. At the same time, the switching gear 363 moves to mesh with the switching rack 364, causing the switching rack 364 to drive the switching gear 363 and the driving worm 362 to rotate, thereby driving the driving worm gear 361 to rotate, realizing the rotation of the mounting plate 32. At the same time, the thermal imaging ranging module 11 monitors the output end of the welding torch 31 until it monitors that the welding torch 31 moves to the connection between the flange 84 and the micro-hole inner cylinder 82. The thermal imaging ranging module 11 transmits an electrical signal to the controller 13. At this time, the controller 13 controls the moving assembly 7 to stop working. At this time, the switching gear 363 is separated from the switching rack 364, and the mounting plate 32 rotates 45°. Due to the self-locking of the worm and worm gear, the mounting plate 32 and the sliding plate 2 maintain a constant relative position. At this time, the working angle of the welding torch 31 is 90°.

[0054] Meanwhile, the controller 13 controls the third power component 64 to work, driving the driving pulley 61 to rotate, thereby driving the driven pulley 62 and the fixed disk 53 on one side of the support base 51 to rotate, driving the rotation of the muffler body 8, making the output end of the welding torch 31 face the front of the welding molten pool. At the same time, the welding torch 31 works, and the working angle of the welding torch 31 is 90°, realizing the butt welding of the flange 84 and the micro-hole inner cylinder 82.

[0055] Meanwhile, due to the layout of the welding torch 31, the welding method at this time is vertical welding with the leftward welding method. The output end of the welding torch 31 faces the front of the molten pool, reducing the heat input to the molten pool, thereby reducing the penetration depth of the molten pool and lowering the risk of welding through the muffler body 8. At the same time, the welding torch 31 preheats the front of the molten pool, and due to the use of vertical welding, the surface tension and gravity of the molten pool are balanced, reducing the risk of deformation at the welding joint.

[0056] As the third power component 64 drives the fixed disk 53 to rotate one circle, the welding of the connection between the flange 84 and the micro-hole inner cylinder 82 is realized. Then the controller 13 controls the third power component 64 to stop working, and at the same time controls the moving component 7 to work, driving the sliding plate 2Y to slide away from the muffler body 8, making the switching rack 364 drive the switching gear 363 to rotate, realizing the reverse rotation of the mounting plate 32 until the sliding plate 2 slides to the point where the switching gear 363 is separated from the switching rack 364. At this time, the mounting plate 32 rotates reversely by 45°, making the working angle of the welding torch 31 45°. Then the moving component 7 drives the sliding plate 2X to move closer to the partition plate 83 and the sliding plate 2Y to move closer to the micro-hole inner cylinder 82, making the welding torch 31 move to the connection between the micro-hole inner cylinder 82 and the partition plate 83. Then the controller 13 controls the third power component 64 to work, and at the same time the welding torch 31 works, realizing the fillet welding at the connection between the micro-hole inner cylinder 82 and the partition plate 83. When performing butt welding or fillet welding at different positions of the muffler body 8, the synchronous switching of the working angle of the welding torch 31 improves the operation coordination of the equipment and saves the power source.

[0057] Then the controller 13 controls the third power component 64 to stop working, and at the same time controls the moving component 7 to work, driving the sliding plate 2Y to slide away from the muffler body 8, and then the moving component 7 continues to drive the sliding plate 2X to move closer to the outer housing 81 and the sliding plate 2Y to move closer to the outer housing 81, making the welding torch 31 move to the connection between the micro-hole inner cylinder 82 and the partition plate 83. At this time, the working angle of the welding torch 31 remains at 45°. Then the controller 13 controls the third power component 64 to work, and at the same time the welding torch 31 works, realizing the fillet welding at the connection between the micro-hole inner cylinder 82 and the partition plate 83, thereby realizing the welding of the muffler body 8.

[0058] Through the above solution, the synchronous and coordinated rotation of the mounting plate 32 and the sliding of the sliding plate 2 are realized, so as to realize the synchronous switching of the working angle of the welding torch 31 when welding different positions of the muffler body 8, improve the operation coordination of the equipment, and save the power source.

[0059] Meanwhile, when the moving component 7 stops working, the displacement sensor 12 monitors the sliding distance of the sliding plate 2 in the Y direction and transmits an electrical signal to the controller 13. At the same time, the controller 13 determines the length of the weld to be welded based on the sliding distance of the sliding plate 2 and adjusts the rotational speed of the third power component 64, thereby realizing the adjustment of the welding speed and improving the consistency of welds at different positions.

[0060] Furthermore, in order to make the welding torch 31 swing periodically to achieve skip arc welding, a swinging member 34 is provided on the workbench 1. Refer to Figure 3 and Figure 4 , the swinging member 34 includes a pressing wheel 341 that is rotatably and slidably connected to the mounting plate 32. The rotation axis of the pressing wheel 341 is parallel to the rotation axis of the welding torch 31. The sliding direction of the pressing wheel 341 is arranged horizontally and is perpendicular to the rotation axis of the pressing wheel 341. The outer peripheral wall of the pressing wheel 341 is movably pressed against the side wall of the welding torch 31 away from the workbench 1. A disc 342 is rotatably connected to the mounting plate 32. The rotation axis of the disc 342 is parallel to the rotation axis of the welding torch 31. A connecting rod 343 is rotatably connected to the side wall of the disc 342. The rotation axis of the connecting rod 343 is parallel to the rotation axis of the disc 342. One end of the connecting rod 343 away from the disc 342 is rotatably connected to the rotating shaft of the pressing wheel 341. A swinging gear 344 is coaxially fixed on the disc 342, and the swinging gear 344 is located on the side of the disc 342 away from the connecting rod 343. A driving gear 345 is rotatably connected to the mounting plate 32. The rotation axis of the driving gear 345 is parallel to the rotation axis of the disc 342. The driving gear 345 meshes with the swinging gear 344. A first power component 346 for driving the driving gear 345 to rotate is further provided on the mounting plate 32. In this application, the first power component 346 is set as a swinging motor.

[0061] In order to adjust the swing amplitude of the welding torch 31 and reduce the heat input to the weld, a sliding member 35 is provided on the workbench 1. Refer to Figure 3 and Figure 4, the sliding member 35 includes a sliding lead screw 351 rotatably connected to the side wall of the wheel disc 342. The rotation axis of the sliding lead screw 351 is consistent with the radial direction of the wheel disc 342. A lead screw nut 352 is also slidably connected to the side wall of the wheel disc 342. The lead screw nut 352 is threadedly engaged with the sliding lead screw 351. The connecting rod 343 is rotatably connected to the side wall of the lead screw nut 352 away from the wheel disc 342. A driving bevel gear 353 is coaxially rotatably connected to the wheel disc 342. One end of the sliding lead screw 351 close to the driving bevel gear 353 is coaxially fixed with a driven bevel gear 354. The driving bevel gear 353 is meshed with the driven bevel gear 354. A second power member 355 for driving the driving bevel gear 353 to rotate is provided on the wheel disc 342. In this application, the second power member 355 is set as an adjustment motor, and the second power member 355 conducts power transmission through an electric slip ring. The first power member 346 and the second power member 355 are both electrically connected to the controller 13.

[0062] During welding, the controller 13 controls the first power member 346 to work, driving the driving gear 345 to rotate, thereby driving the oscillating gear 344 and the wheel disc 342 to rotate, and further driving the connecting rod 343 to rotate around the rotation axis of the wheel disc 342. Since one end of the connecting rod 343 away from the wheel disc 342 is in abutting connection with the rotation of the wheel 341, and the abutting wheel 341 is slidably connected to the mounting plate 32, the connecting rod 343 drives the abutting wheel 341 to reciprocate, and the outer peripheral wall of the abutting wheel 341 periodically abuts against the side wall of the welding torch 31, driving the welding torch 31 to rotate, separating the welding torch 31 from the adjusting block 331, and driving the welding torch 31 to reverse under the drive of the elastic member, so that the welding torch 31 abuts against the adjusting block 331, thereby driving the welding torch 31 to reciprocate, realizing skip arc welding, reducing the risk of welding through the muffler body 8 caused by concentrated heat input, improving the welding quality of the muffler body 8, improving the airtightness of the muffler body 8, and thus improving the sound absorption performance and service life of the muffler body 8.

[0063] At the same time, compared with directly driving the abutting wheel 341 to reciprocate by a cylinder or an electric push rod, the above scheme has high operation stability. At the same time, compared with a multi-axis welding robot, the structure is simple, which is convenient for technicians to operate, reduces the equipment cost, and the controller 13 makes the rotation speeds of the first power member 346 and the third power member 64 match, so that the rotation speed of different positions of the welded muffler body 8 is adapted to the reciprocating swing frequency of the welding torch 31, improving the welding quality of different positions of the muffler body 8.

[0064] During the fillet welding of the partition plate 83 and the outer housing 81, since the weld length between the partition plate 83 and the outer housing 81 is longer than the weld length between the partition plate 83 and the microporous inner cylinder 82, the welding time is long, and the heat input is likely to accumulate, resulting in a local temperature rise, generating a large thermal stress, increasing the risk of cracks and deformation at the weld. At this time, the controller 13 controls the second power component 355 to work, driving the driving bevel gear 353 to rotate, driving the driven bevel gear 354 and the sliding lead screw 351 to rotate, thereby driving the lead screw nut 352 to slide away from the driven bevel gear 354, further increasing the sliding distance of the connecting rod 343 driving the pressing wheel 341, and thus increasing the periodic distance of the output end of the welding torch 31 away from the outer peripheral wall of the muffler body 8, thereby reducing the heat input and improving the welding quality of the muffler body 8.

[0065] At the same time during welding, the thermal imaging ranging module 11 monitors the flow pattern and temperature of the molten pool at the welding point. When the fluidity of the molten pool is too strong, the temperature is too high, or the fluidity of the molten pool is too poor and the temperature is too low, the thermal imaging ranging module 11 transmits an electrical signal to the controller 13. At this time, the controller 13 controls the second power component 355 to work, thereby driving the driving bevel gear 353 to rotate forward and backward, realizing driving the lead screw nut 352 to slide, and realizing the adjustment of the swing amplitude of the welding torch 31, thereby realizing the real-time adjustment of the heat input of the welding torch 31 during welding, reducing the risk of welding through the muffler body 8, and further improving the welding quality of the muffler body 8.

[0066] Furthermore, in order to cool down the welded muffler body 8 and improve the welding quality, an air-cooling component 4 is arranged on the workbench 1. Refer to Figure 6 and Figure 7 , the air-cooling component 4 includes an air suction cylinder 41 coaxially fixed on the fixed disk 53 on one side of the support seat 51. The air suction cylinder 41 is movably attached to the side wall of the fixed disk 53 on one side of the support seat 51 that is close to each other. Uniform flow holes 42 are provided on the outer peripheral wall of the air suction cylinder 41. The diameter of the middle part of the air suction cylinder 41 is smaller than the diameters of both ends of the air suction cylinder 41, and the diameter change of the air suction cylinder 41 is smoothly transitioned. The middle part of the air suction cylinder 41 corresponds to the microporous part of the microporous inner cylinder 82. A heat exchange chamber 43 is formed between the air suction cylinder 41 and the microporous inner cylinder 82. A communication port 44 communicating with the inside of the air suction cylinder 41 and an air inlet 45 communicating with the inside of the heat exchange chamber 43 are provided on the fixed disk 53. A blower is communicated at the communication port 44 of the fixed disk 53 on one side of the support seat 51.

[0067] In order to improve the heat dissipation efficiency of the muffler body 8, refer to Figure 6 and Figure 7, the air-cooling component 4 further includes a heat-absorbing plate 46 elastically and slidably connected to the air suction cylinder 41. The sliding direction of the heat-absorbing plate 46 is consistent with the radial direction of the air suction cylinder 41. There are multiple heat-absorbing plates 46, and the multiple heat-absorbing plates 46 are evenly arranged at intervals along the circumferential direction of the air suction cylinder 41. The heat-absorbing plate 46 is arc-shaped and is in movable abutment with the inner peripheral wall of the micro-hole inner cylinder 82. In this application, the heat-absorbing plate 46 is made of thick copper plate. In other embodiments, the heat-absorbing plate 46 can also be made of thick steel plate or ceramic plate and other materials.

[0068] In order to keep the connection part of two adjacent heat-absorbing plates 46 intact when the heat-absorbing plate 46 slides close to and abuts against the inner peripheral wall of the micro-hole inner cylinder 82, there are four heat-absorbing plates 46 in this application, and they are arranged in pairs. The joint surfaces of two adjacent heat-absorbing plates 46 always remain consistent with the sliding directions of two of the heat-absorbing plates 46 arranged oppositely.

[0069] When positioning and supporting the muffler body 8, the technician pushes the movable seat 52 to coaxially insert the air suction cylinder 41 into the micro-hole inner cylinder 82. At this time, due to the elastically slidable heat-absorbing plate 46, it is convenient for the technician to operate.

[0070] During welding, the fan works to drive the gas to enter and exit the air suction cylinder 41 through the communication ports 44 on the two fixed disks 53, and then a negative pressure is formed in the air suction cylinder 41, so that the external gas enters the heat exchange cavity 43 through the air inlets 45 on the two fixed disks 53, and is then inhaled into the air suction cylinder 41 through the flow holes 42, thereby driving the flow of the gas in the heat exchange cavity 43, realizing the cooling of the muffler body 8, reducing the range of the heat affected zone, reducing welding deformation, and the gas enters the heat exchange cavity 43 from both sides, making the air-cooling efficiency on both sides of the muffler body 8 consistent, thus ensuring the consistency of the welds on both sides. At the same time, the heat-absorbing plate 46 absorbs the heat during welding, and then through the gas flow, the heat of the heat-absorbing plate 46 is taken away, improving the heat dissipation efficiency.

[0071] When welding the partition plate 83 and the micro-hole inner cylinder 82, the heat dissipation efficiency of the micro-hole part of the micro-hole inner cylinder 82 is low, which is easy to increase the temperature gradient on both sides of the weld, causing the weld to deform due to thermal stress. At this time, since the diameter of the part of the air suction cylinder 41 corresponding to the micro-hole part of the micro-hole inner cylinder 82 is smaller than the diameters at both ends of the air suction cylinder 41, the gas flow velocity at the corresponding part of the air suction cylinder 41 and the micro-hole part of the micro-hole inner cylinder 82 increases, making the gas at the micro-hole part of the micro-hole inner cylinder 82 enter the air suction cylinder 41 faster, improving the heat dissipation effect of the micro-hole part of the micro-hole inner cylinder 82, and reducing the deformation of the weld due to the temperature difference.

[0072] When butt-welding the flange 84 and the micro-hole inner cylinder 82, the heat-absorbing plate 46 abuts against the inner peripheral wall of the micro-hole inner cylinder 82, making the heat-absorbing plate 46 act as a welding backing plate, which can reduce the risk of back collapse of the weld and improve the quality of the weld.

[0073] The implementation principle of a welding device for an impedance composite muffler in an embodiment of this application is as follows: When welding is required, technicians use a traveling crane to lift the muffler body 8 after spot welding pre-fixing onto the workbench 1, and make the shell fit with the support wheel 54. Then, the technicians push the movable seat 52 to coaxially insert the suction cylinder 41 into the micro-hole inner cylinder 82, and make the fixed disk 53 fit with the side walls of the flanges 84 that are close to each other. Then, the technicians fix the flanges 84 on both sides and the fixed disk 53 in sequence with bolts and nuts.

[0074] Then, the technicians start the equipment, and the controller 13 controls the movement component 7 to work, driving the sliding plate 2Y to slide close to the micro-hole inner cylinder 82, so that the switching rack 364 drives the switching gear 363 and the driving worm 362 to rotate, thereby driving the driving turbine and the mounting plate 32 to rotate until the welding torch 31 moves to the connection between the flange 84 and the micro-hole inner cylinder 82. At this time, the working angle of the welding torch 31 is 90°.

[0075] Then, the welding torch 31 works, and the controller 13 drives the first power component 346, the second power component 355, and the third power component 64 to work. At this time, the third power component 64 drives the driving pulley 61 to rotate, thereby driving the driven pulley 62 and the corresponding fixed disk 53 to rotate, realizing the rotation of the muffler body 8. The first power component 346 drives the driving gear 345 to rotate, thereby driving the oscillating gear 344 and the wheel disk 342 to rotate, further driving the connecting rod 343 to rotate, and the connecting rod 343 drives the pressing wheel 341 to reciprocate, making the pressing wheel 341 press against the welding torch 31 and driving the welding torch 31 to rotate. At the same time, under the action of the elastic component, it drives the welding torch 31 to reverse, thereby driving the welding torch 31 to reciprocate and swing, realizing the welding of the micro-hole inner cylinder 82 and the flange 84.

[0076] Then, the controller 13 controls the movement component 7 to work, driving the sliding plate 2Y to slide away from the micro-hole inner cylinder 82, so that the switching rack 364 drives the switching gear 363 and the driving worm 362 to reverse until the switching gear 363 is separated from the switching rack 364, realizing a 45° reverse rotation of the mounting plate 32. At this time, the working angle of the welding torch 31 is 45°. Then, the movement component 7 drives the sliding plate 2X to slide close to the side wall of the partition plate 83 and the sliding plate 2Y to slide close to the outer peripheral wall of the micro-hole inner cylinder 82, so that the welding torch 31 moves to the connection between the micro-hole inner cylinder 82 and the partition plate 83. Then, the controller 13 drives the first power component 346, the second power component 355, and the third power component 64 to work, realizing the welding of the micro-hole inner cylinder 82 and the partition plate 83.

[0077] Then, the controller 13 controls the movement component 7 to work, driving the sliding plate 2Y to slide away from the micro-hole inner cylinder 82. At this time, the holding working angle of the welding torch 31 is 45°. Then, the movement component 7 drives the sliding plate 2X to slide close to the side wall of the partition plate 83 and slide in the Y direction close to the outer peripheral wall of the outer housing 81, so that the welding torch 31 moves to the connection part between the micro-hole inner cylinder 82 and the partition plate 83. Then, the controller 13 drives the first power component 346, the second power component 355 and the third power component 64 to work, realizing the welding of the partition plate 83 and the outer housing 81, and thus realizing the welding of the muffler body 8.

[0078] At the same time, the controller 13 adjusts the rotation speeds of the first power component 346 and the second power component 355 according to the electrical signals of the thermal imaging module and the displacement sensor 12, realizing the adjustment of the welding speed and the swing frequency of the welding torch 31. At the same time, the controller 13 controls the second power component 355 to work, driving the driving bevel gear 353 to rotate, driving the driven bevel gear 354 and the sliding lead screw 351 to rotate, thereby driving the lead screw nut 352 to slide, and further adjusting the sliding distance of the connecting rod 343 driving the pressing wheel 341, so as to realize the adjustment of the swing amplitude of the welding torch 31, and thus adjust the heat input of the welding torch 31 to the molten pool.

[0079] During welding, the fan works simultaneously. At this time, the heat absorption plate 46 absorbs the energy during welding. The fan drives the gas to enter and exit the suction cylinder 41 through the communication ports 44 on the two fixed disks 53, thereby forming a negative pressure in the suction cylinder 41, so that the external gas enters the heat exchange cavity 43 through the air inlets 45 on the two fixed disks 53, and then is inhaled into the suction cylinder 41 through the flow holes 42, thus driving the flow of the gas in the heat exchange cavity 43, taking away the heat of the heat absorption plate 46, realizing the cooling of the muffler body 8, and improving the heat dissipation efficiency of the micro-hole part of the micro-hole inner cylinder 82, so that during welding, the temperature gradients on both sides of the weld are kept consistent.

[0080] After welding is completed, the technician removes the bolts and nuts used to fix the flange 84 and the fixed cylinder, and can transport the muffler body 8 away by a crane.

[0081] The above are all the preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An impedance composite muffler welding device, characterized in that: It includes a workbench, a sliding plate arranged on the workbench, and a moving component for driving the sliding plate to move along the X and Y directions. The pre-fixed muffler body is horizontally rotatably installed on the workbench. There are two sliding plates, and the two sliding plates respectively correspond to the two ends of the muffler body. A support component for positioning and supporting the muffler body, a welding component for welding the muffler body, and an air-cooling component for cooling the muffler body are arranged on the workbench; The support component includes a support seat arranged on the workbench and a movable seat slidably arranged on the workbench. Fixed disks are rotatably arranged on both the support seat and the movable seat. The two flanges of the pre-fixed muffler body are respectively movably attached to the side walls of the two fixed disks close to each other, and the two flanges are respectively detachably and fixedly connected coaxially with the two fixed disks. A rotating component for driving the fixed disk on one side of the support seat to rotate is arranged on the workbench; The welding component includes a welding torch arranged on the horizontal side of the muffler body, and the output end of the welding torch is arranged towards the outer peripheral wall of the muffler body. The other end of the welding torch extends obliquely downward to the side away from the muffler body. An adjusting piece for adjusting the inclination angle of the welding torch is arranged on the sliding plate. A mounting plate is rotatably arranged on the sliding plate, and the welding torch is rotatably connected to the mounting plate. A driving piece for driving the mounting plate to rotate, a swinging piece for making the welding torch swing periodically, and a sliding piece for adjusting the swing amplitude of the welding torch are also arranged on the workbench.

2. An impedance composite muffler welding device according to claim 1, characterized in that: The air-cooling component includes an air suction cylinder coaxially arranged on the fixed disk on one side of the movable seat. The air suction cylinder is movably attached to the side wall of the fixed disk on one side of the support seat close to it. A plurality of circulation holes are evenly arranged on the outer peripheral wall of the air suction cylinder. The diameter of the middle part of the air suction cylinder is smaller than the diameters of the two ends of the air suction cylinder, and the diameter change part of the air suction cylinder is smoothly transitioned. The middle part of the air suction cylinder corresponds to the microporous part of the microporous inner cylinder. A heat exchange cavity is formed between the air suction cylinder and the microporous inner cylinder. A communication port communicating with the inside of the air suction cylinder and an air inlet communicating with the inside of the heat exchange cavity are arranged on the fixed disk. A blower is communicated at the communication port of the fixed disk on one side of the support seat.

3. An impedance composite muffler welding device according to claim 2, characterized in that: The air-cooling component further includes a heat absorption plate elastically slidably arranged on the air suction cylinder. There are a plurality of heat absorption plates, and the plurality of heat absorption plates are evenly arranged at intervals along the circumferential direction of the air suction cylinder. The heat absorption plate is arc-shaped and is movably abutted against the inner peripheral wall of the microporous inner cylinder.

4. An impedance composite muffler welding device according to claim 3, characterized in that: The adjusting piece includes an adjusting block rotatably arranged on the mounting plate. The adjusting block is consistent with the rotation axis of the welding torch, and the adjusting block is located above the welding torch. The side wall of the welding torch is movably abutted against the bottom wall of the adjusting block. An elastic piece for pressing the welding torch against the adjusting block is arranged on the mounting plate. An adjusting screw is threadedly arranged on the mounting plate. The adjusting screw is arranged along the radius direction of the rotation axis of the adjusting block and is movably abutted against the outer peripheral wall of the rotation axis of the adjusting block.

5. An impedance composite muffler welding device according to claim 4, characterized in that: The swinging piece includes a pressing wheel rotatably and slidably arranged on the mounting plate. The outer peripheral wall of the pressing wheel is movably abutted against the side wall of the welding torch. A wheel disk is rotatably arranged on the mounting plate. A connecting rod is rotatably connected to the side wall of the wheel disk. The end of the connecting rod away from the wheel disk is rotatably connected to the rotation axis of the pressing wheel. A swinging gear is coaxially arranged on the wheel disk, and the swinging gear is located on the side of the wheel disk away from the connecting rod. A driving gear is rotatably arranged on the mounting plate. The driving gear is meshed with the swinging gear. A first power component for driving the driving gear to rotate is also arranged on the mounting plate.

6. An impedance composite muffler welding device according to claim 5, characterized in that: The sliding member includes a sliding lead screw rotatably provided on the side wall of the wheel disc. A lead screw nut is also slidably provided on the side wall of the wheel disc, and the lead screw nut slides along the radial direction of the wheel disc. The lead screw nut is in threaded fit with the sliding lead screw. The connecting rod is rotatably connected to the side wall of the lead screw nut away from the wheel disc. A driving bevel gear is rotatably provided coaxially on the wheel disc. One end of the sliding lead screw close to the driving bevel gear is coaxially provided with a driven bevel gear. The driving bevel gear meshes with the driven bevel gear. A second power member for driving the driving bevel gear to rotate is provided on the wheel disc.

7. An impedance composite muffler welding device according to claim 6, characterized in that: The driving member includes a driving worm gear coaxially provided on the rotating shaft of the mounting plate, and the driving worm gear is located at the bottom of the sliding plate. A driving worm is rotatably provided on the side wall of the sliding plate close to the driving worm gear. The driving worm meshes with the driving worm gear. A switching gear is coaxially provided on the driving worm. A switching rack is provided on the workbench. The switching rack is movably meshed with the switching gear.

8. An impedance composite muffler welding device according to claim 7, characterized in that: The welding torch is provided with a thermal imaging ranging module for monitoring the output end of the welding torch and the molten pool. The workbench is provided with a controller and a displacement sensor for monitoring the sliding distance of the sliding plate in the direction of approaching / leaving the muffler body. The thermal imaging ranging module, the displacement sensor, the first power member, the second power member, the rotating assembly and the moving assembly are all electrically connected to the controller.

9. An impedance composite muffler welding device according to claim 8, characterized in that: The support assembly further includes support wheels rotatably provided on the workbench. There are multiple groups of support wheels, and the multiple groups of support wheels are arranged at equal intervals along the axial direction of the air suction cylinder. Each group of support wheels includes two support wheels provided on both sides of the air suction cylinder. The outer peripheral wall of the support wheel is in active contact with the outer peripheral wall of the outer housing.

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