A welding device for assembling air ducts

Abstract

The present invention belongs to the technical field of air duct welding, and specifically relates to a welding device for air duct assembly, including a base, a butt joint unit, an annular welding assembly, a vertical wall, a first electric push rod, a C-shaped seat and a C-shaped grinding block; the first electric push rod pushes the C-shaped seat to move, so that the C-shaped grinding block aligns the end of the pipe wall of the air duct section; the butt joint unit lifts the air duct section and moves it towards the vertical wall, so that the end of the pipe wall of the air duct section is inserted into the groove of the C-shaped grinding block, and the annular welding assembly drives the first electric push rod to rotate, driving the C-shaped seat and the C-shaped grinding block to rotate, so that the C-shaped grinding block grinds and removes burrs on the end of the pipe wall of the air duct section; thus, the influence of burrs at the end of the air duct section on welding is avoided, the formation of slag inclusion and welding pores is reduced, the welding performance is improved, and then the processing quality of the air duct is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of air duct welding, in particular to a welding device for assembling air ducts. Background Art

[0002] An air duct is a pipe used for air transportation and distribution. When manufacturing an air duct, the plate is bent into a cylindrical shape, and then the seams are welded to form an air duct section. When in use, multiple air duct sections are assembled and welded according to needs to form the entire air duct.

[0003] A patent application with publication number CN116117423A discloses a duct welding device, including a base frame, a pillar fixedly connected to the bottom of the base frame, a pair of support frames for supporting the duct fixedly connected to the base frame, and a plurality of rolling rollers are provided on the support frames; a fixed frame is fixedly connected to one side of the base frame, a lifting cylinder is installed on the fixed frame, and a welding gun for welding two ducts is installed on the lifting cylinder; a driving mechanism for driving the duct to move is installed on both sides of the base frame, and the driving mechanism includes a connecting frame, a pair of movable sliders are symmetrically connected to the connecting frame, and a first pulley, a gear and a first driving wheel rotating coaxially are connected to the top of the sliders in sequence; a motor is installed on one of the sliders, and a belt line is connected between the two first pulleys for transmission; by providing a driving mechanism and a driving assembly, the duct can be driven to perform various movements, which is convenient for welding the duct.

[0004] There will be burr defects at the end of the duct section. When the duct section is assembled and welded in the later stage, it will not only reduce the processing accuracy and surface quality of the duct surface, but also affect the later welding performance of the duct, and sometimes even cause slag inclusions and welding pores.

[0005] To this end, the present invention provides a welding device for assembling an air duct. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A welding device for assembling air ducts according to the present invention includes a base; both ends of the top surface of the base are provided with butt-joint units; an air duct section is clamped at the top of the butt-joint unit; the middle of the top surface of the base is provided with a welding unit; the welding unit includes a vertical wall; the vertical wall is fixedly connected to the middle of the top surface of the base; a circular groove is opened in the middle of the vertical wall; an annular welding assembly is arranged inside the circular groove; both sides of the annular welding assembly are provided with a plurality of first electric push rods; the piston rod of the first electric push rod faces the axis of the circular groove; the end of the piston rod of the first electric push rod is fixedly connected with a C-shaped seat; a C-shaped grinding block is bolted inside the C-shaped seat; the butt-joint unit lifts the air duct section and moves it towards the vertical wall, so that the end of the pipe wall of the air duct section is inserted into the groove of the C-shaped grinding block. At this time, the annular welding assembly drives the first electric push rod to rotate, drives the C-shaped seat and the C-shaped grinding block to rotate, and enables the C-shaped grinding block to grind and remove burrs on the end of the pipe wall of the air duct section; thus, the influence of burrs at the end of the air duct section on welding is avoided, the formation of slag inclusions and welding pores is reduced, the welding performance is improved, and then the processing quality of the air duct is improved.

[0008] Preferably, the annular welding assembly includes an annular groove; the annular groove is opened in the middle of the outer circle of the circular groove; a rotating ring is rotatably installed inside the annular groove; a plurality of the first electric push rods are fixedly connected to both sides of the rotating ring; a gear ring is fixedly connected to the middle of the outer circle of the rotating ring; a first motor is fixedly connected to the middle of the top surface of the vertical wall; a gear is fixedly connected to the outer circle of the rotating shaft of the first motor; the gear meshes with the gear ring; a laser welding machine is fixedly connected to the middle of the inner circle of the rotating ring; it provides power for the rotation of the first electric push rod, the C-shaped seat and the C-shaped grinding block; at the same time, it drives the laser welding machine to rotate, so that the laser welding machine welds around the end of the pipe wall of the air duct section.

[0009] Preferably, the butt-joint unit includes a first support plate; the two first support plates are respectively slidably installed at both ends of the top surface of the base; a moving assembly is arranged inside the base, and the moving assembly drives the first support plate to slide; a fixing assembly is arranged on the top of the first support plate; the fixing assembly includes a support seat; the support seat is arranged on the top of the first support plate; an arc-shaped groove is opened in the middle of the top surface of the support seat; the air duct section is arranged in the arc-shaped groove at the top of the support seat.

[0010] Preferably, the moving component includes a sliding groove; the sliding groove is formed in the middle of the base; a bidirectional lead screw is rotatably installed in the middle of the sliding groove; one end of the base is fixedly connected with a second motor; the rotating shaft of the second motor is fixedly connected with the end of the bidirectional lead screw; a support cross frame is rotatably installed on the outer circle in the middle of the bidirectional lead screw; both ends of the support cross frame are fixedly connected with both sides of the sliding groove; the middle part of the bottom surface of the first support plate is fixedly connected with a slider; the slider is slidably matched with the sliding groove; the bidirectional lead screw penetrates through the slider, and the bidirectional lead screw is in threaded cooperation with the slider; thus, the splicing work of two air duct sections is completed.

[0011] Preferably, the splicing unit further includes a second support plate; a plurality of fixing grooves are formed on both sides of the second support plate and on the side of the first support plate away from the vertical wall; an extension frame is bolted between the first support plate and the second support plate; a plurality of convex blocks are fixedly connected to both sides of the extension frame; the convex blocks are matched with the fixing grooves; a fixing component is also arranged on the top of the second support plate; thus, the lifting length of the air duct section is extended, so that the air duct section can be welded in a horizontal state, and the welding quality is improved accordingly.

[0012] Preferably, the fixing component further includes an arc-shaped pressing plate; a pair of arc-shaped pressing plates are hinged at both ends of the top surface of the support seat; a second electric push rod is rotatably installed on both sides of the arc-shaped pressing plate; the end of the second electric push rod away from the arc-shaped pressing plate is hinged to the top surface of the support seat; thus, the fixing effect on the air duct section is improved, and the probability of the air duct section moving is reduced.

[0013] Preferably, clamping grooves are formed at both ends of the support seat; screws are fixedly connected to both ends of the top surface of the first support plate; the screws penetrate through the clamping grooves; nuts are threadedly installed at the tops of the screws; lower wedges are arranged at both ends of the top surface of the first support plate; upper wedges are arranged at the bottom surfaces of both ends of the support seat; the inclined surfaces of the upper wedges and the lower wedges correspond to each other; notches are formed in the middle of the ends of the lower wedges close to the support seat and in the middle of the ends of the upper wedges away from the support seat, and the notches are sleeved on the outer sides of the screws; thus, it is convenient for the staff to adjust the horizontal height of the support seat, and then it is convenient to carry out the welding work on air duct sections with different diameters.

[0014] Preferably, stepped grooves are formed on the top inclined surface of the lower wedge and the bottom inclined surface of the upper wedge; the stepped groove on the top of the lower wedge can be engaged with the stepped groove on the bottom of the upper wedge; thus, the connection strength between the lower wedge and the upper wedge is improved, and the situation of sliding displacement between the lower wedge and the upper wedge is reduced; and then the support strength of the support seat is improved.

[0015] Preferably, guide bars are fixedly connected to both sides of the bottom surface of the lower wedge block; guide grooves are formed in the top surfaces of both ends of the first support plate; the guide bars are slidably engaged with the guide grooves; positioning grooves are formed in both sides of the top surface of the upper wedge block; positioning blocks are fixedly connected to both sides of the bottom surfaces of both ends of the support seat; the positioning blocks are matched with the positioning grooves; by the cooperation of the positioning blocks and the positioning grooves, the upper wedge block can be fixed to the bottom surfaces of both ends of the support seat; through the sliding cooperation of the guide bars and the guide grooves, the position of the lower wedge block can be accurately adjusted, and the accuracy of the contact and cooperation between the upper wedge block and the lower wedge block is improved.

[0016] Preferably, a positioning assembly is arranged on one side of the first support plate close to the vertical wall; the positioning assembly includes a V-shaped elastic frame; the V-shaped elastic frame is fixedly connected to the middle of one side of the first support plate close to the vertical wall; a wedge-shaped frame is fixedly connected to the side of the V-shaped elastic frame away from the first support plate; a baffle is fixedly connected to the top of the wedge-shaped frame; the baffle can contact the end of the air duct section; wedge-shaped stoppers are fixedly connected to both sides of the middle of the bottom surface of the vertical wall; the inclined surface at the bottom of the wedge-shaped stopper can be in sliding contact with the inclined surface at the top of the wedge-shaped frame; an opening is formed in the middle of one side of the wedge-shaped frame close to the vertical wall; the width of the opening is greater than the diameter of the bidirectional lead screw; the end of the air duct section can enter the circular groove so that the two air duct sections can be accurately butted in the middle of the circular groove, and the laser welding machine can accurately perform the welding work.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. A welding device for air duct assembly according to the present invention includes a base, a butting unit, an annular welding assembly, a vertical wall, a first electric push rod, a C-shaped seat and a C-shaped grinding block; the butting unit lifts the air duct section and moves it towards the vertical wall, so that the end of the pipe wall of the air duct section is inserted into the groove of the C-shaped grinding block. At this time, the annular welding assembly drives the first electric push rod to rotate, drives the C-shaped seat and the C-shaped grinding block to rotate, and the C-shaped grinding block grinds the end of the pipe wall of the air duct section to remove burrs; thus, the influence of burrs at the end of the air duct section on welding is avoided, the formation of slag inclusion and welding pores is reduced, the welding performance is improved, and the processing quality of the air duct is improved.

[0019] 2. A welding device for air duct assembly according to the present invention includes a first support plate, a support seat, a card slot, a screw, a lower wedge block and an upper wedge block; the lower wedge block is installed at both ends of the top surface of the first support plate, so that the notch of the lower wedge block is sleeved on the outer circle of the screw, and the upper wedge block is in contact with the lower wedge block; push the lower wedge block to slide towards the middle of the first support plate, so that the upper wedge block and the support seat move upward, adjust the height of the air duct section, align the axis of the air duct section with the axis of the circular groove, and then lock the nut at the top of the screw to fix and lock the support seat; thus, it is convenient for the staff to adjust the horizontal height of the support seat, and then it is convenient to perform welding work on air duct sections with different diameters. Description of the Drawings

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a perspective view of the present invention;

[0022] Figure 2 is an exploded view of the present invention;

[0023] Figure 3 is a perspective view of the welding unit in the present invention;

[0024] Figure 4 is an exploded view of the welding unit in the present invention;

[0025] Figure 5 is an exploded view of the C-shaped seat in the present invention;

[0026] Figure 6 is a perspective view of the butt-joint unit in the present invention;

[0027] Figure 7 is an exploded view of the butt-joint unit in the present invention;

[0028] Figure 8 is a perspective view of the fixing component in the present invention;

[0029] Figure 9 is an exploded view of the fixing component in the present invention;

[0030] Figure 10 is a perspective view of the arc-shaped pressing plate in the present invention;

[0031] Figure 11 is a perspective view of the lower wedge block and the upper wedge block in the present invention;

[0032] Figure 12 is a perspective view of the support seat in the present invention;

[0033] Figure 13 is an exploded view of the positioning component in the present invention;

[0034] In the figure: 1, base; 2, air duct section; 3, vertical wall; 4, circular groove; 5, first electric push rod; 6, C-shaped seat; 7, C-shaped grinding block; 8, annular groove; 9, rotating ring; 10, gear ring; 11, first motor; 12, gear; 13, laser welding machine; 14, first support plate; 15, support seat; 16, sliding groove; 17, bidirectional lead screw; 18, second motor; 19, supporting cross frame; 20, slider; 21, second support plate; 22, fixing groove; 23, extension frame; 24, convex block; 25, arc-shaped pressing plate; 26, second electric push rod; 27, clamping groove; 28, screw; 29, lower wedge block; 30, upper wedge block; 31, stepped groove; 32, guide bar; 33, guide groove; 34, positioning groove; 35, positioning block; 36, V-shaped elastic frame; 37, wedge-shaped frame; 38, baffle; 39, wedge-shaped stop block; 40, opening. Detailed implementation manners

[0035] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0036] As Figures 1 to 5 shown, a welding device for assembling air ducts according to an embodiment of the present invention includes a base 1; both ends of the top surface of the base 1 are provided with butt-joint units; the top of the butt-joint units clamps an air duct section 2; the middle of the top surface of the base 1 is provided with a welding unit; the welding unit includes a vertical wall 3; the vertical wall 3 is fixedly connected to the middle of the top surface of the base 1; a circular groove 4 is opened in the middle of the vertical wall 3; an annular welding assembly is arranged inside the circular groove 4; a plurality of first electric push rods 5 are arranged on both sides of the annular welding assembly; the piston rod of the first electric push rod 5 faces the axis of the circular groove 4; the end of the piston rod of the first electric push rod 5 is fixedly connected to a C-shaped seat 6; a C-shaped grinding block 7 is bolted inside the C-shaped seat 6;

[0037] During operation, the two air duct sections 2 to be assembled and welded are respectively placed on the butt-joint units at both ends of the top of the base 1; the first electric push rod 5 pushes the C-shaped seat 6 to move, so that the C-shaped grinding block 7 aligns the end of the pipe wall of the air duct section 2; the butt-joint unit lifts the air duct section 2 and moves it towards the vertical wall 3, so that the end of the pipe wall of the air duct section 2 is inserted into the groove inside the C-shaped grinding block 7. At this time, the circular welding assembly drives the first electric push rod 5 to rotate, drives the C-shaped seat 6 and the C-shaped grinding block 7 to rotate, so that the C-shaped grinding block 7 grinds the end of the pipe wall of the air duct section 2 to remove burrs; after the grinding is completed, the butt-joint unit lifts the air duct section 2 and moves it backward, driving the end of the pipe wall of the air duct section 2 to move out of the groove of the C-shaped grinding block 7; then, the first electric push rod 5 receives, driving the C-shaped seat 6 and the C-shaped grinding block 7 to move towards the outside of the circular groove 4; then, the butt-joint unit lifts the air duct section 2 and inserts it into the circular groove 4 of the vertical wall 3, so that the ends of the pipe walls of the two air duct sections 2 are aligned and in contact, and the circular welding assembly welds the ends of the pipe walls of the two air duct sections 2; thus, the influence of burrs at the ends of the air duct section 2 on welding is avoided, the formation of slag inclusions and welding pores is reduced, the welding performance is improved, and then the processing quality of the air duct is improved.

[0038] As Figures 1 to 5 shown, the circular welding assembly includes a ring groove 8; the ring groove 8 is opened in the middle of the outer ring of the circular groove 4; a rotating ring 9 is rotatably installed inside the ring groove 8; a plurality of the first electric push rods 5 are fixedly connected to both sides of the rotating ring 9; a gear ring 10 is fixedly connected to the middle of the outer ring of the rotating ring 9; a first motor 11 is fixedly connected to the middle of the top surface of the vertical wall 3; a gear 12 is fixedly connected to the outer ring of the rotating shaft of the first motor 11; the gear 12 meshes with the gear ring 10; a laser welding machine 13 is fixedly connected to the middle of the inner ring of the rotating ring 9;

[0039] During operation, the first motor 11 drives the gear 12 to rotate, drives the gear ring 10 to rotate, drives the rotating ring 9 to rotate along the ring groove 8, provides power for the rotation of the first electric push rod 5, the C-shaped seat 6 and the C-shaped grinding block 7; at the same time, drives the laser welding machine 13 to rotate, so that the laser welding machine 13 welds around the end of the pipe wall of the air duct section 2, so that welding work can be carried out without the need for the air duct section 2 to rotate, and then the situation of misalignment of the two air duct sections 2 is reduced.

[0040] As Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 and Figure 8As shown, the butt-joint unit includes a first pallet 14; the two first pallets 14 are respectively slidably installed at both ends of the top surface of the base 1; a moving component is arranged inside the base 1, and the moving component drives the first pallet 14 to slide; a fixing component is arranged on the top of the first pallet 14; the fixing component includes a support seat 15; the support seat 15 is arranged on the top of the first pallet 14; an arc-shaped groove is formed in the middle of the top surface of the support seat 15; the air duct section 2 is arranged in the arc-shaped groove at the top of the support seat 15;

[0041] The moving component includes a chute 16; the chute 16 is formed in the middle of the base 1; a bidirectional lead screw 17 is rotatably installed in the middle of the chute 16; a second motor 18 is fixedly connected to one end of the base 1; the rotating shaft of the second motor 18 is fixedly connected to the end of the bidirectional lead screw 17; a support cross frame 19 is rotatably installed on the outer circle in the middle of the bidirectional lead screw 17; both ends of the support cross frame 19 are fixedly connected to both sides of the chute 16; a slider 20 is fixedly connected to the middle of the bottom surface of the first pallet 14; the slider 20 is slidably matched with the chute 16; the bidirectional lead screw 17 passes through the slider 20, and the bidirectional lead screw 17 is in threaded cooperation with the slider 20;

[0042] During work, the two air duct sections 2 to be assembled and welded are respectively placed on the support seats 15 at both ends of the top of the base 1, and the air duct section 2 is fixed in the arc-shaped groove at the top of the support seat 15; the second motor 18 drives the bidirectional lead screw 17 to rotate, drives the sliders 20 on both sides to slide relatively along the chute 16, drives the first pallets 14 and the support seats 15 on both sides to slide relatively, so that the two air duct sections 2 approach or move away from each other; thus, the splicing work of the two air duct sections 2 is completed.

[0043] As Figures 6 to 8 shown, the butt-joint unit further includes a second pallet 21; a plurality of fixing grooves 22 are formed on both sides of the second pallet 21 and on the side of the first pallet 14 away from the vertical wall 3; an extension frame 23 is bolted between the first pallet 14 and the second pallet 21; a plurality of convex blocks 24 are fixedly connected to both sides of the extension frame 23; the convex blocks 24 are matched with the fixing grooves 22; a fixing component is also arranged on the top of the second pallet 21;

[0044] During work, when the length of the air duct section 2 is too long, one end of the air duct section 2 away from the vertical wall 3 will sag, which is likely to cause displacement at the welding joint of the air duct section 2 and result in welding failure. At this time, it is necessary to additionally lift and support the air duct section 2; the second pallet 21 is fixedly installed on the side of the first pallet 14 away from the vertical wall 3 through the extension frame 23, and the connection strength of the first pallet 14, the extension frame 23 and the second pallet 21 is improved through the insertion and cooperation of the convex blocks 24 and the fixing grooves 22; thus, the lifting length of the air duct section 2 is extended, so that the air duct section 2 can be kept horizontal for welding, and the welding quality is improved accordingly.

[0045] As Figures 6 to 10 shown, the fixing component further includes an arc-shaped pressing plate 25; a pair of the arc-shaped pressing plates 25 are hinged at both ends of the top surface of the support base 15; two electric push rods 26 are rotatably installed on both sides of the arc-shaped pressing plate 25; one end of the two electric push rod 26 away from the arc-shaped pressing plate 25 is hinged to the top surface of the support base 15; during operation, when the air duct section 2 is placed into the arc-shaped groove inside the top of the support base 15, the two electric push rod 26 pushes the arc-shaped pressing plate 25 to rotate, so that the top of the arc-shaped pressing plate 25 contacts the outer wall of the air duct section 2; the arc-shaped pressing plates 25 on both sides clamp and fix the outer wall of the air duct section 2, thereby improving the fixing effect on the air duct section 2 and reducing the probability of the air duct section 2 moving.

[0046] As Figures 6 to 12 shown, clamping grooves 27 are formed at both ends of the support base 15; screw rods 28 are fixedly connected to both ends of the top surface of the first support plate 14; the screw rods 28 penetrate through the clamping grooves 27; nuts are threadedly installed at the tops of the screw rods 28; lower wedge blocks 29 are arranged at both ends of the top surface of the first support plate 14; upper wedge blocks 30 are arranged at the bottom surfaces of both ends of the support base 15; the inclined surfaces of the upper wedge blocks 30 correspond to those of the lower wedge blocks 29; through grooves are formed in the middle of one end of the lower wedge block 29 close to the support base 15 and the middle of one end of the upper wedge block 30 away from the support base 15, and the through grooves are sleeved on the outer sides of the screw rods 28;

[0047] During operation, since the diameters of the air duct sections 2 are different, and when the air duct sections 2 are welded, it is necessary to make the air duct sections 2 located at the center of the circular groove 4 for welding; at this time, it is necessary to adjust the horizontal height of the support base 15 according to the diameter of the air duct section 2; install the lower wedge blocks 29 at both ends of the top surface of the first support plate 14, so that the through grooves of the lower wedge blocks 29 are sleeved on the outer circles of the screw rods 28, and make the upper wedge blocks 30 contact the lower wedge blocks 29; push the lower wedge blocks 29 to slide towards the middle of the first support plate 14, so that the upper wedge blocks 30 and the support base 15 move upward, adjust the height of the air duct section 2, so that the axis of the air duct section 2 is aligned with the axis of the circular groove 4, and then lock the nuts at the tops of the screw rods 28 to fix and lock the support base 15; thus, it is convenient for the staff to adjust the horizontal height of the support base 15, and then it is convenient to carry out the welding work on the air duct sections 2 with different diameters.

[0048] As Figure 11As shown, stepped grooves 31 are provided on both the top inclined surface of the lower wedge block 29 and the bottom inclined surface of the upper wedge block 30; the stepped groove 31 on the top of the lower wedge block 29 can be engaged with the stepped groove 31 on the bottom of the upper wedge block 30; by providing the stepped grooves 31 on the inclined surfaces of the lower wedge block 29 and the upper wedge block 30, when the lower wedge block 29 contacts the upper wedge block 30, the stepped grooves 31 at the top and bottom are engaged with each other, thereby improving the connection strength between the lower wedge block 29 and the upper wedge block 30 and reducing the occurrence of sliding displacement between the lower wedge block 29 and the upper wedge block 30; subsequently, the support strength for the support base 15 is improved.

[0049] As Figure 9 and Figure 11 shown, guide bars 32 are fixedly connected to both sides of the bottom surface of the lower wedge block 29; guide grooves 33 are provided on the top surfaces at both ends of the first support plate 14; the guide bars 32 are in sliding fit with the guide grooves 33; positioning grooves 34 are provided on both sides of the top surface of the upper wedge block 30; positioning blocks 35 are fixedly connected to both sides of the bottom surfaces at both ends of the support base 15; the positioning blocks 35 are matched with the positioning grooves 34; by the cooperation of the positioning blocks 35 and the positioning grooves 34, the upper wedge block 30 can be fixed to the bottom surfaces at both ends of the support base 15; through the sliding fit of the guide bars 32 and the guide grooves 33, the position of the lower wedge block 29 can be adjusted accurately, thereby improving the accuracy of the contact and cooperation between the upper wedge block 30 and the lower wedge block 29.

[0050] As Figure 2 、 Figure 6 and Figure 13 shown, a positioning assembly is provided on one side of the first support plate 14 close to the vertical wall 3; the positioning assembly includes a V-shaped elastic frame 36; the V-shaped elastic frame 36 is fixedly connected to the middle of one side of the first support plate 14 close to the vertical wall 3; a wedge-shaped frame 37 is fixedly connected to the side of the V-shaped elastic frame 36 away from the first support plate 14; a baffle 38 is fixedly connected to the top of the wedge-shaped frame 37; the baffle 38 can contact the end of the air duct section 2; wedge-shaped stoppers 39 are fixedly connected to both sides of the middle of the bottom surface of the vertical wall 3; the inclined surface at the bottom of the wedge-shaped stopper 39 can be in sliding contact with the inclined surface at the top of the wedge-shaped frame 37; an opening 40 is provided in the middle of the side of the wedge-shaped frame 37 close to the vertical wall 3; the width of the opening 40 is greater than the diameter of the bidirectional lead screw 17.

[0051] During operation, when the air duct section 2 is placed inside the arc-shaped groove at the top of the support 15, the end of the air duct section 2 contacts the baffle 38, making the distances between the two air duct sections 2 and the vertical wall 3 the same; when the support 15 holds up the air duct section 2 and approaches the vertical wall 3, the first support plate 14 drives the V-shaped elastic frame 36, the wedge-shaped frame 37 and the baffle 38 to approach the vertical wall 3. The wedge-shaped frame 37 contacts the wedge-shaped stop 39, causing the wedge-shaped frame 37 to slide downward along the inclined surface of the wedge-shaped stop 39, making the V-shaped elastic frame 36 bend downward, driving the baffle 38 to move downward, exposing the end of the air duct section 2, enabling the end of the air duct section 2 to enter the circular groove 4 so that the two air duct sections 2 can be accurately butted in the middle of the circular groove 4, enabling the laser welding machine 13 to accurately perform the welding work.

[0052] Working principle: The second support plate 21 is fixedly installed on the side of the first support plate 14 away from the vertical wall 3 through the extension frame 23. Through the insertion and cooperation of the convex block 24 and the fixing groove 22, the connection strength of the first support plate 14, the extension frame 23 and the second support plate 21 is improved; the lifting length of the air duct section 2 is extended; according to the diameter of the air duct section 2, the horizontal height of the support 15 is adjusted; the lower wedge block 29 is installed at both ends of the top surface of the first support plate 14, making the notch of the lower wedge block 29 sleeved on the outer ring of the screw 28, and making the upper wedge block 30 contact the lower wedge block 29; pushing the lower wedge block 29 to slide towards the middle of the first support plate 14, making the upper wedge block 30 and the support 15 move upward, adjusting the height of the air duct section 2 so that the axis of the air duct section 2 is aligned with the axis of the circular groove 4, and then locking the nut at the top of the screw 28 to fix and lock the support 15.

[0053] The two air duct sections 2 to be assembled and welded are respectively placed on the supports 15 at both ends of the top of the base 1, and the air duct section 2 is fixed in the arc-shaped groove at the top of the support 15; the end of the air duct section 2 contacts the baffle 38, making the distances between the two air duct sections 2 and the vertical wall 3 the same; the second electric push rod 26 pushes the arc-shaped pressing plate 25 to rotate, making the top of the arc-shaped pressing plate 25 contact the outer wall of the air duct section 2; the arc-shaped pressing plates 25 on both sides clamp and fix the outer wall of the air duct section 2.

[0054] The second motor 18 drives the bidirectional lead screw 17 to rotate, driving the sliders 20 on both sides to slide relative to each other along the sliding groove 16, driving the first support plates 14 and the supports 15 on both sides to slide relative to each other, making the air duct sections 2 on both sides move towards the vertical wall 3; the first support plate 14 drives the V-shaped elastic frame 36, the wedge-shaped frame 37 and the baffle 38 to approach the vertical wall 3. The wedge-shaped frame 37 contacts the wedge-shaped stop 39, causing the wedge-shaped frame 37 to slide downward along the inclined surface of the wedge-shaped stop 39, making the V-shaped elastic frame 36 bend downward, driving the baffle 38 to move downward, exposing the end of the air duct section 2.

[0055] The first electric push rod 5 pushes the C-shaped seat 6 to move, so that the C-shaped grinding block 7 aligns with the end of the pipe wall of the air duct section 2, and the end of the pipe wall of the air duct section 2 is inserted into the groove inside the C-shaped grinding block 7; at this time, the first motor 11 drives the gear 12 to rotate, drives the gear ring 10 to rotate, drives the rotating ring 9 to rotate along the ring groove 8, drives the rotation of the first electric push rod 5, the C-shaped seat 6 and the C-shaped grinding block 7, so that the C-shaped grinding block 7 grinds the end of the pipe wall of the air duct section 2 to remove burrs;

[0056] After the grinding is completed, the splicing unit lifts the air duct section 2 and moves it backward, driving the end of the pipe wall of the air duct section 2 to move out of the groove of the C-shaped grinding block 7; then, the first electric push rod 5 retracts, driving the C-shaped seat 6 and the C-shaped grinding block 7 to move towards the outside of the circular groove 4; then, the splicing unit lifts the air duct section 2 and inserts it into the circular groove 4 of the vertical wall 3, so that the ends of the pipe walls of the two air duct sections 2 are aligned and in contact; the first motor 11 drives the gear 12 to rotate, drives the gear ring 10 to rotate, drives the rotating ring 9 to rotate along the ring groove 8, drives the laser welding machine 13 to rotate, so that the laser welding machine 13 welds around the end of the pipe wall of the air duct section 2;

[0057] Thus, the influence of burrs at the end of the air duct section 2 on welding is avoided, the formation of slag inclusions and welding pores is reduced, the welding performance is improved, and then the processing quality of the air duct is improved.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for assembling air ducts, characterized in that: It comprises a base; both ends of the top surface of the base are provided with a counter-jointed unit; the top of the counter-jointed unit clamps a duct section; a welding unit is provided in the middle of the top surface of the base; the welding unit comprises a vertical wall; the vertical wall is fixedly connected to the middle of the top surface of the base; a circular groove is provided in the middle of the vertical wall; an annular welding assembly is provided inside the circular groove; a plurality of No. 1 electric push rods are provided on both sides of the annular welding assembly; the piston rod of the No. 1 electric push rod faces the axis of the circular groove; the piston rod end of the No. 1 electric push rod is fixedly connected with a C-shaped seat; a C-shaped grinding block is bolted inside the C-shaped seat; the counter-jointed unit comprises a No. 1 support plate; two No. 1 support plates are slidably mounted on the two ends of the top surface of the base respectively; a moving assembly is provided inside the base, and the moving assembly drives the No. 1 support plate to slide; a fixing assembly is provided on the top of the No. 1 support plate; the fixing assembly comprises a bracket; the bracket is arranged on the top of the No. 1 bracket; an arc groove is provided in the middle of the top surface of the bracket; the duct section is arranged in the arc groove on the top of the bracket; The annular welding assembly comprises an annular groove; the annular groove is arranged in the middle of the outer ring of the circular groove; a rotating ring is rotatably installed inside the annular groove; a plurality of No. 1 electric push rods are fixedly connected to the two sides of the rotating ring; a gear ring is fixedly connected to the middle of the outer ring of the rotating ring; a No. 1 motor is fixedly connected to the middle of the top surface of the vertical wall; a gear is fixedly connected to the outer ring of the rotating shaft of the No. 1 motor; the gear is meshed with the gear ring; a laser welding machine is fixedly connected to the middle of the inner ring of the rotating ring; The moving component includes a slide groove; the slide groove is opened in the middle of the base; a bidirectional screw is rotatably installed in the middle of the slide groove; a No. 2 motor is fixedly connected to one end of the base; the rotating shaft of the No. 2 motor is fixedly connected to the end of the bidirectional screw; a supporting cross frame is rotatably installed on the middle outer ring of the bidirectional screw; the two ends of the supporting cross frame are respectively fixedly connected to the two sides of the slide groove; a slider is fixedly connected to the middle of the bottom surface of the No. 1 support plate; the slider is slidably matched with the slide groove; the bidirectional screw passes through the slider, and the bidirectional screw is threadedly matched with the slider.

2. A welding device for assembling air ducts according to claim 1, characterized in that: The splicing unit also includes a No. 2 pallet; multiple fixing grooves are provided on both sides of the No. 2 pallet and on the side of the No. 1 pallet away from the vertical wall; an extension frame is bolted between the No. 1 pallet and the No. 2 pallet; multiple protrusions are fixed on both sides of the extension frame; the protrusions match the fixing grooves; a fixing component is also provided on the top of the No. 2 pallet.

3. A welding device for assembling air ducts according to claim 1, characterized in that: The fixing assembly also includes an arc-shaped pressure plate; a pair of arc-shaped pressure plates are hinged at both ends of the top surface of the bracket; a No. 2 electric push rod is rotatably installed on both sides of the arc-shaped pressure plate; and one end of the No. 2 electric push rod away from the arc-shaped pressure plate is hinged to the top surface of the bracket.

4. A welding device for assembling air ducts according to claim 1, characterized in that: There are slots at both ends of the bracket; screws are fixed at both ends of the top surface of the No. 1 bracket; the screws pass through the slots; nuts are installed on the top threads of the screws; lower wedges are provided at both ends of the top surface of the No. 1 bracket; upper wedges are provided on the bottom surfaces of both ends of the bracket; the inclined surfaces of the upper wedges correspond to those of the lower wedges; slots are provided at the middle of one end of the lower wedge close to the bracket and at the middle of one end of the upper wedge away from the bracket, and the slots are sleeved on the outside of the screw.

5. A welding device for assembling air ducts according to claim 4, characterized in that: The top inclined surface of the lower wedge block and the bottom inclined surface of the upper wedge block are both provided with step grooves; the step groove at the top of the lower wedge block can be engaged with the step groove at the bottom of the upper wedge block.

6. A welding device for assembling air ducts according to claim 4, characterized in that: Guide bars are fixedly connected to both sides of the bottom surface of the lower wedge block; guide grooves are provided on the top surfaces of both ends of the No. 1 support plate; the guide bars and the guide grooves are slidably matched; positioning grooves are provided on both sides of the top surface of the upper wedge block; positioning blocks are fixedly connected to both sides of the bottom surfaces of both ends of the bracket; the positioning blocks match the positioning grooves.

7. A welding device for assembling air ducts according to claim 6, characterized in that: A positioning assembly is provided on one side of the No. 1 support plate close to the vertical wall; the positioning assembly comprises a V-shaped elastic frame; the V-shaped elastic frame is fixedly connected to the middle part of one side of the No. 1 support plate close to the vertical wall; a wedge-shaped frame is fixedly connected to the side of the V-shaped elastic frame away from the No. 1 support plate; a baffle is fixedly connected to the top of the wedge-shaped frame; the baffle can contact the end of the air duct section; wedge-shaped blocks are fixedly connected to both sides of the middle part of the bottom surface of the vertical wall; the inclined surface at the bottom of the wedge-shaped block can slide in contact with the inclined surface at the top of the wedge-shaped frame; an opening is provided in the middle part of one side of the wedge-shaped frame close to the vertical wall; the width of the opening is greater than the diameter of the bidirectional screw rod.

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