Automatic welding device for exhaust fan blades

Abstract

The invention relates to the technical field of fan blade machining, and discloses an automatic exhaust fan blade welding device which comprises a base, a fan clamping mechanism for driving fan blades to rotate and a movable laser welding gun are arranged on the base, and a fixed disc and a movable disc are arranged on the base. A displacement welding mechanism for driving the laser welding gun to move along a welding seam is arranged between the fixed disc and the movable disc, the displacement welding mechanism comprises a first motor, a swing arm transmission mechanism and a directional adjusting mechanism, the first motor enables the laser welding gun to move on the directional adjusting mechanism through the swing arm transmission mechanism, and the fan clamping mechanism obliquely clamps a hub. According to the full-automatic fan blade welding device, through the full-automatic welding process and the welding track control and decoupling mechanism, automatic welding of the fan blade is achieved, the welding quality and efficiency are remarkably improved, and the welding efficiency is improved. And manual intervention is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of fan blade processing, and in particular to an automatic welding device for exhaust fan blades. Background Art

[0002] Exhaust fans are a type of air conditioning appliance that uses an electric motor to drive the rotation of fan blades to drive air flow, thereby exchanging indoor and outdoor air. They are used in many places. The fan blades used in the exhaust fan in the factory exhaust system are larger and generally made of metal to improve durability. The fan blades are mainly composed of a hub and blades. When processing the fan blades, multiple blades need to be evenly welded to the hub. Existing fan blade processing equipment mostly uses semi-automatic processing. After the hub is clamped, the blades are fitted to the hub and positioned through positioning structures and angle adjustment mechanisms. Then, they are welded manually or by a robotic arm. The rotation angle of the hub is controlled to control the spacing of the blades. When robotic arm welding is used, it is difficult for traditional fixtures to ensure the precise alignment of the hub and blades. Offset is prone to occur during welding, resulting in uneven welds or cold welds. During the welding process, the welding gun and blades are prone to collision, causing damage to the equipment or workpiece. When manual welding is used, the welding gun angle and workpiece position need to be adjusted frequently. The welding speed is slow, which is difficult to meet mass production needs and has low processing efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the above difficulties and provide an automatic welding device for exhaust fan blades.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is: an automatic welding device for exhaust fan blades, comprising a base, on which a fan clamping mechanism for driving the blades to rotate and a movable laser welding gun are provided; A fixed plate and a movable plate are provided on the base, and a displacement welding mechanism for driving the laser welding gun to move along the welding seam is provided between the fixed plate and the movable plate; The displacement welding mechanism includes a motor 1, a swing arm transmission mechanism and a directional adjustment mechanism. The swing arm transmission mechanism includes a swing arm 1 and a swing arm 2. The swing arm 1 and the swing arm 2 are rotatably arranged on a fixed plate and a movable plate respectively. The motor 1 is connected to the swing arm 1 by power. One end of the swing arm 1 is provided with a vertical rod coupled with the end of the swing arm 2. The directional adjustment mechanism includes two sets of arc tracks and an adjustment platform on which the fixed plate and the movable plate are respectively installed. Two laser welding guns are installed on the two adjustment platforms. The swing arm 1 and the swing arm 2 synchronously drive the two adjustment platforms to move on the corresponding arc tracks. The fan clamping mechanism tilts the hub to keep the blades at the welding position in a horizontal state. Two symmetrical laser welding guns weld the upper and lower welds, and the moving trajectory of the working end of the laser welding gun is close to the weld.

[0005] As an improvement: an arc-shaped slide groove 2 is provided on the inner side of the arc-shaped track, a slider sliding on the inner side of the arc-shaped slide groove 2 is provided on the adjustment platform, two sets of rollers are respectively rotatably provided at both ends of the slider, the rollers cooperate with the side walls of the arc-shaped slide groove 2, a sliding shaft is provided on the top of the slider, straight grooves are provided at the ends of the swing arm 1 and the swing arm 2, and the sliding shaft and the straight grooves are slidably cooperated.

[0006] As an improvement: a plug-in column is provided at the through hole at one end of the swing arm 2, a baffle is provided on the top of the plug-in column, a spring is provided between the baffle and the swing arm 2, a slide is provided on the top of the baffle, a slot is provided on the top of the vertical pole to cooperate with the plug-in column, an arc-shaped slide groove 1 is provided at the bottom of the movable plate to slide with the slide, a decoupling groove is provided at one end point of the arc-shaped slide groove, and when the vertical pole moves to the decoupling groove position, the plug-in column leaves the slot.

[0007] As an improvement: a positioning arc groove is provided on the fixed plate, the bottom of the vertical rod extends into the positioning arc groove, and ball table one and ball table two are rotatably provided on the top of the slide and the bottom of the vertical rod respectively, ball table one and ball table two respectively cooperate with the bottom surface of the positioning arc groove and the top surface of arc slide groove one, a cylinder one is provided at the decoupling groove, and an annular pressure table that slides with the decoupling groove is provided at the output end of the cylinder one, and the annular pressure table abuts against the slide at the decoupling groove position.

[0008] As an improvement: a transmission frame is provided at the rear end of the movable disk, and rotating shafts hinged to the base are provided on both sides of the transmission frame. Cylinder 2 is hingedly provided on the rear side of the base, and the output end of cylinder 2 is hinged to the transmission frame. A butt plate abutting against the movable disk is provided on the top of the base.

[0009] As an improvement: the fan clamping mechanism includes a fixed platform and a swing arm, the fixed platform is installed at the bottom of the movable disk, the swing arm is hinged to the rotating shaft, a second motor is provided on the fixed platform, a pressure plate is provided at the output end of the second motor, a square platform abutting the swing arm is provided on the fixed disk, a positioning platform is rotatably provided at the end of the swing arm, and the positioning platform and the pressure plate clamp the wheel hub.

[0010] As an improvement: a linkage rod is provided at the bottom of the transmission frame, an arc-shaped notch is provided on the linkage rod, a follower shaft is provided on the swing arm, the follower shaft passes through the arc-shaped notch, and the linkage rod drives the swing arm to rotate.

[0011] As an improvement: a loading mechanism is provided on one side of the base, and the loading mechanism includes a vertical frame and a material box. The material box is arranged on the vertical frame, and a straight slide rail is provided at the bottom of the material box. A push plate is slidably provided on the straight slide rail, and a material trough for placing blades is provided on the top of the push plate. The top of the push plate slides in cooperation with the groove at the bottom of the material box, and a cylinder three for driving the push plate to move is provided on the vertical frame.

[0012] As an improvement: two fixed plates are provided at the bottom of the push plate, a sliding rod is provided between the fixed plates, a push platform is provided at the output end of cylinder three, a through hole is provided on the push platform for sliding cooperation with the sliding rod, a spring two is provided between the front end of the push platform and the front fixed plate, and a trigger one and a trigger two are provided on the front fixed plate and the front end of the push platform respectively.

[0013] As an improvement: positioning mechanisms are provided on both sides of the stand, the positioning mechanisms include cylinder four, a positioning plate is provided at the output end of cylinder four, and positioning grooves that fit the edges of the blades are provided at the ends of the two positioning plates.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the present invention realizes the automated process of feeding, positioning and welding of fan blades through a fully automated welding process, welding trajectory control and decoupling mechanism, significantly improves welding quality and efficiency, and reduces manual intervention. Specifically: 1. The fan clamping mechanism cooperates with the swing arm and the linkage rod. When the moving disk is closed, the hub is in an inclined state, so that the blades at the welding position are always in a horizontal position, which is convenient for the loading and positioning of the blades and for track welding; 2. The arc track of the directional adjustment mechanism matches the elliptical track of the weld. The laser welding gun moves accurately along the joint through the swing arm transmission mechanism. The two groups of symmetrically arranged laser welding guns weld the upper and lower welds at the same time, which improves efficiency and reduces thermal deformation. 3. The decoupling structure of the second swing arm and the vertical pole makes it easy for the moving plate to drive the second swing arm and the upper arc track and welding gun to move, which is convenient for the hub to be fed in and the fan blade to be discharged; 4. The feeding mechanism realizes automatic conveying and precise alignment of the blades through the push plate and positioning mechanism, and combines the photoelectric limiter to control the indexing rotation of the hub to achieve continuous welding; 5. The pushing structure at the bottom of the push plate cooperates with the trigger to trigger the alarm in time when the material is stuck to avoid damage to the blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure of the present invention is schematically shown in FIG. Figure 1 .

[0016] Figure 2 The structure of the present invention is schematically shown in FIG. Figure 2 .

[0017] Figure 3 It is a schematic diagram of the main structure of the present invention.

[0018] Figure 4 It is an exploded view of the main structure of the present invention.

[0019] Figure 5 It is a structural schematic diagram of the fixed disk of the present invention.

[0020] Figure 6 It is a structural schematic diagram of the mobile disk of the present invention.

[0021] Figure 7 It is a partial cross-sectional view of the movable disk of the present invention.

[0022] Figure 8It is a structural schematic diagram of the displacement welding mechanism of the present invention.

[0023] Fig. 9 It is an exploded view of the swing arm transmission mechanism of the present invention.

[0024] Fig.10 It is a structural schematic diagram of the directional adjustment mechanism of the present invention.

[0025] Fig.11 It is a structural schematic diagram of the adjustment platform of the present invention.

[0026] Fig.12 It is a structural schematic diagram of the fan clamping mechanism of the present invention.

[0027] Fig.13 It is an exploded view of the fan clamping mechanism of the present invention.

[0028] Fig.14 It is a structural schematic diagram of the feeding mechanism and the positioning mechanism of the present invention.

[0029] Fig.15 It is a structural schematic diagram of the push plate of the present invention.

[0030] Fig.16 It is an exploded view of the push plate of the present invention.

[0031] Fig.17 It is a schematic diagram of the structure of the fan blade.

[0032] As shown in the figure: 0, fan blade; 01, hub; 02, blade; 03, reinforcing rib; 1, base; 2, variable position welding mechanism; 3, swing arm transmission mechanism; 4, directional adjustment mechanism; 5, laser welding gun; 6, fan clamping mechanism; 7, feeding mechanism; 8, positioning mechanism; 11, fixed disk; 111, positioning arc groove; 112, square platform; 12, moving disk; 121, transmission frame; 122, rotating shaft; 123, linkage rod; 124, arc notch; 125, first arc chute; 126, decoupling groove; 127, first cylinder; 128, annular pressing platform; 13, second cylinder; 14, abutting plate; 15, photoelectric limiter; 21, first motor; 22, first gear; 31, first swing arm; 32, second swing arm; 321, inserting post; 322, baffle plate; 323, first spring; 324, sliding table; 325, first ball table; 33, straight notch; 34, wire loop; 35, vertical rod; 351, second ball table; 352, inserting slot; 36, second gear; 41, arc track; 411, second arc chute; 42, adjusting table; 421, sliding block; 422, roller; 423, sliding shaft; 43, connecting plate; 61, fixed platform; 62, second motor; 63, pressing plate; 64, swinging arm; 641, first arm rod; 642, follower shaft; 643, second arm rod; 644, connecting table; 65, positioning table; 651, positioning shaft; 71, vertical frame; 72, material box; 73, straight slide rail; 74, pushing plate; 741, material chute; 742, fixing plate; 743, sliding rod; 744, second spring; 745, first trigger; 746, limiting groove; 75, third cylinder; 76, pushing platform; 761, second trigger; 81, fourth cylinder; 82, positioning plate; 83, positioning groove. Detailed implementation mode

[0033] The present invention will be further described in detail below with reference to the accompanying drawings.

[0034] Combined with the attached Figure 1 、attached Figure 2 、attached Figure 3 and attached Figure 4 As shown in the figures, an automatic welding device for the fan blades of an exhaust fan includes a base 1. A fan clamping mechanism 6 for driving the rotation of the fan blade 0 and a movable laser welding gun 5 are provided on the base 1. A fixed disk 11 and a moving disk 12 are provided on the base 1. A variable position welding mechanism 2 for driving the laser welding gun 5 to move along the weld seam is provided between the fixed disk 11 and the moving disk 12. The variable position welding mechanism 2 includes a first motor 21, a swing arm transmission mechanism 3 and a directional adjustment mechanism 4. The first motor 21 drives the laser welding gun 5 to move on the directional adjustment mechanism 4 through the swing arm transmission mechanism 3. The fan clamping mechanism 6 clamps the hub 01 obliquely, so that the blade 02 at the welding position is in a horizontal state. Two symmetric laser welding guns 5 weld the upper and lower two weld seams, and the moving track of the working end of the laser welding gun 5 is close to the weld seam.

[0035] Combined with the attached Figure 8, Attachment Fig. 9 , Attachment Fig.10 and attached Fig.11 As shown, the directional adjustment mechanism 4 includes two sets of arc tracks 41 and an adjustment platform 42 on which the fixed disk 11 and the movable disk 12 are respectively installed. A connecting plate 43 is installed at the bottom of the adjustment platform 42, and the laser welding gun 5 is fixed on the connecting plate 43. The inner side of the arc track 41 is provided with an arc chute 411, and the adjustment platform 42 is provided with a slider 421 that slides inside the arc chute 411. Two sets of rollers 422 are rotatably provided at both ends of the slider 421, and the rollers 422 cooperate with the side walls of the arc chute 411. A sliding shaft 423 is provided on the top of the slider 421, and the swing arm transmission The driving mechanism 3 includes a swing arm 1 31 and a swing arm 2 32, which are rotatably arranged on the fixed disk 11 and the movable disk 12 respectively. A gear 1 22 is arranged at the output end of the motor 1 21, and a gear 2 36 meshing with the gear 1 22 is coaxially connected to the rotating axis of the swing arm 1 31. A vertical rod 35 coupled with the end of the swing arm 2 32 is arranged at one end of the swing arm 1 31, and straight slots 33 are arranged at the ends of the swing arm 1 31 and the swing arm 2 32. The sliding shaft 423 is slidably matched with the straight slots 33, and the swing arm 1 31 and the swing arm 2 32 are provided with wire loops 34 at the straight slots 33.

[0036] The working principle of the swing arm transmission mechanism 3 and the directional adjustment mechanism 4 is as follows: after the motor 1 21 is started, the gear 1 22 at its output end drives the gear 2 36 meshing with it to rotate. Since the gear 2 36 is coaxially connected with the swing arm 1 31, the swing arm 1 31 starts to rotate around the axis on the fixed disk 11, and the end of the swing arm 1 31 is coupled with the swing arm 2 32 through the vertical rod 35, driving the swing arm 2 32 to rotate synchronously on the movable disk 12. The ends of the two swing arms are provided with straight slots 33, which are slidably matched with the sliding shaft 423 through the straight slots 33. When the swing arms 1 31 and the swing arms 2 32 swing, the sliding shaft 423 slides along the straight slots 33, pushing the slider 421 to move on the arc track 41. Rollers 422 are provided at both ends of the slider 421, which roll along the inner side of the arc slide groove 2 411 to reduce friction and limit the motion trajectory to an arc. The adjustment platform 42 is fixed to the laser welding gun 5 through the connecting plate 43. When the slider 421 slides along the arc track 41, the adjustment platform 42 drives the laser welding gun 5 to move synchronously through the connecting plate 43. The geometric shape of the arc track 41 determines the movement path of the welding gun and limits the angle change of the working end of the laser welding gun 5 when moving, so that it can weld along the joint of the hub 01 and the blade 02. The joint trajectory of the hub 01 and the blade 02 is close to an ellipse. The path of the arc track 41 in the welding section is equidistant from the joint trajectory. When the blade 02 is arc-shaped, the arc slide groove 411 has a height change in the welding section, so that the working end of the laser welding gun 5 can adapt to the special-shaped weld. The path at the rear side of the welding section is adaptively extended to adjust the distance between the laser welding gun 5 and the blade 02 to prevent the laser welding gun 5 from colliding with the blade 02 when the movable disk 12 is opened.

[0037] Combined with Figure 6 , Attachment Figure 7 and attached Fig. 9 As shown, a plug post 321 is provided at a through hole at one end of the swing arm 32, a baffle 322 is provided at the top of the plug post 321, a spring 323 is provided between the baffle 322 and the swing arm 32, a slide 324 is provided at the top of the baffle 322, a slot 352 which is plugged and matched with the plug post 321 is provided at the top of the vertical rod 35, an arc-shaped slide groove 125 which is slidably matched with the slide 324 is provided at the bottom of the movable plate 12, a decoupling groove 126 is provided at one end of the arc-shaped slide groove 125, and when the vertical rod 35 moves to the position of the decoupling groove 126, the plug post 321 leaves the slot 352, The fixed plate 11 is provided with a positioning arc groove 111, and the bottom of the vertical rod 35 extends into the positioning arc groove 111. The top of the slide 324 and the bottom of the vertical rod 35 are respectively rotatably provided with a ball table 1 325 and a ball table 2 351. The ball table 1 325 and the ball table 2 351 are respectively matched with the bottom surface of the positioning arc groove 111 and the top surface of the arc slide groove 1 125. A cylinder 127 is provided at the decoupling groove 126. The output end of the cylinder 127 is provided with an annular pressure table 128 that slides with the decoupling groove 126. The annular pressure table 128 abuts against the slide 324 at the position of the decoupling groove 126.

[0038] Working principle of the swing arm transmission mechanism with decoupling function: the plug column 321 at the end of the second swing arm 32 is plugged into the vertical rod 35 through the slot 352 at the top to realize power transmission. The spring 1 323 is pressed between the baffle 322 and the second swing arm 32 to provide axial elastic force to ensure that the plug column 321 and the slot 352 are closely matched to avoid disengagement during movement. The slide 324 at the top of the plug column 321 slides along the arc-shaped slide groove 125 at the bottom of the moving disk 12 to limit the movement trajectory of the second swing arm 32. The ball table 1 325 and the ball table 2 351 are in rolling contact with the arc-shaped slide groove 125 and the positioning arc groove 111 respectively to reduce friction. When the vertical rod 35 moves to the position of the decoupling groove 126, the spring 1 323 pushes the baffle plate 322 into the decoupling groove 126, so that the plug post 321 is away from the slot 352. At this time, the vertical rod 35 and the swing arm 2 32 are automatically decoupled. When re-coupling is required, the cylinder 127 is started to push the annular pressing table 128 to slide along the decoupling groove 126 and press the slide 324 downward. After the slide 324 is pressed, it drives the plug post 321 to overcome the elastic force of the spring 1 323 and move downward, and reinsert into the slot 352 until the slide 324 moves down to the position of the arc-shaped slide groove 125, thereby realizing the power connection between the vertical rod 35 and the swing arm 2 32. When the vertical rod 35 moves, the slide 324 slides back into the arc-shaped slide groove 125. In the welding state, the vertical rod 35 will not move to the position of the decoupling groove 126. After all the blades 02 are welded, the vertical rod 35 moves to the position of the decoupling groove 126 to achieve decoupling. At this time, the laser welding gun 5 is located behind the fan blade 0, and the upper laser welding gun 5 will not collide with the fan blade 0 during the opening process of the movable disk 12.

[0039] Combined with Figure 3 , Attachment Figure 5 , Attachment Figure 6 , Attachment Fig.12 and attached Fig.13 As shown, the rear end of the movable disk 12 is provided with a transmission frame 121, and both sides of the transmission frame 121 are provided with a rotating shaft 122 hinged to the base 1, and the rear side of the base 1 is hinged with a cylinder 13, and the output end of the cylinder 13 is hinged to the transmission frame 121. The top of the base 1 is provided with a plate 14 that abuts against the movable disk 12, and the fan clamping mechanism 6 includes a fixed platform 61 and a swing arm 64, the fixed platform 61 is installed at the bottom of the movable disk 12, and a motor 62 is provided on the fixed platform 61, and a pressure plate 63 is provided at the output end of the motor 62, and the swing arm 64 includes an arm 1 641, an arm 2 643 and a connecting platform 644, one end of the arm 1 641 is hinged to the rotating shaft 122, and the other end is hinged to the arm 2 A follower shaft 642 is provided between the ends of 643, and the other end of the arm rod 643 is connected to the connecting platform 644. A positioning platform 65 is rotatably provided on the connecting platform 644, and a positioning shaft 651 is provided on the positioning platform 65. The positioning shaft 651 is plugged into the inner axial through hole of the hub 01, and the positioning platform 65 and the pressure plate 63 clamp the hub 01. A square platform 112 abutting against the arm rod 643 is provided on the fixed disk 11, and a linkage rod 123 is provided at the bottom of the transmission frame 121. An arc-shaped groove 124 is provided on the linkage rod 123. The follower shaft 642 passes through the arc-shaped groove 124, and the linkage rod 123 drives the swing arm 64 to rotate. Photoelectric limiters 15 are provided on both the fixed disk 11 and the movable disk 12.

[0040] The linkage working principle of the movable disk 12 and the fan clamping mechanism 6 is as follows: when the wheel hub 01 is in the feeding state, the movable disk 12 is in the open state, and the linkage rod 123 lifts the swing arm 64. At this time, the positioning platform 65 is at or close to the horizontal plane. After the wheel hub 01 is placed on the positioning platform 65, the cylinder 13 pushes the movable disk 12 to close. During this process, the swing arm 64 moves down to the square platform 112 by its own weight, and the movable disk 12 continues to rotate until the movable disk 12 contacts the abutment plate 14. At this time, the movable disk 12 is in a horizontal position, and the arc-shaped notch 124 cooperates with the square platform 112 to limit the swing arm 64, so that the swing arm 64 keeps its position unchanged, and the pressure plate 63 and the positioning platform 65 clamp the wheel hub 01; During welding, motor 2 62 drives the pressure plate 63 to rotate, driving the wheel hub 01 to rotate. The rotation stop time is provided by a signal from the photoelectric limiter 15. After a blade 02 is welded on the wheel hub 01, it rotates a certain angle. When this blade 02 blocks the light of the photoelectric limiter 15, the wheel hub 01 stops rotating and the welding of the next blade 02 is carried out. When all blades 02 are welded, the movable disk 12 is opened to facilitate the discharge of the fan blade 0. When the movable disk 12 is opened, the fixed table 61 first drives the pressure plate 63 to lift, releases the clamping state, and the linkage rod 123 rotates. When the lower end of the arc-shaped notch 124 contacts the follower shaft 642, the linkage rod 123 drives the swing arm 64 to rotate, so that the positioning table 65 lifts the fan blade 0 and moves it to a horizontal position, so that the welded fan blade 0 can be taken out.

[0041] Combined with Figure 2 , Attachment Fig.14 , Attachment Fig.15 , Attachment Fig.16 and attached Fig.17 As shown, a feeding mechanism 7 is provided on one side of the base 1, and the feeding mechanism 7 includes a stand 71 and a material box 72. The material box 72 is arranged on the stand 71, and a straight slide rail 73 is provided at the bottom of the material box 72. A push plate 74 is slidably provided on the straight slide rail 73. A material trough 741 for placing the blade 02 is provided on the top of the push plate 74. A limiting groove 746 is provided on the material trough 741. The limiting groove 746 matches the reinforcing rib 03 on the back of the blade 02. The top of the push plate 74 slides with the groove at the bottom of the material box 72. A cylinder three 75 for driving the push plate 74 to move is provided on the frame 71, and two fixed plates 742 are provided at the bottom of the push plate 74, a slide bar 743 is provided between the fixed plates 742, a push platform 76 is provided at the output end of the cylinder three 75, and a through hole is provided on the push platform 76 for sliding cooperation with the slide bar 743, a spring two 744 is provided between the front end of the push platform 76 and the front fixed plate 742, and a trigger one 745 and a trigger two 761 are provided at the front fixed plate 742 and the front end of the push platform 76 respectively.

[0042] Working principle of feeding mechanism 7: blade 02 is placed in material box 72, the bottom of material box 72 is open, blade 02 automatically falls onto material trough 741, the shape of material trough 741 fits blade 02, when blade 02 is arc-shaped, material trough 741, top surface of push plate 74 and bottom opening of material box 72 are also arc-shaped, when blade 02 is loaded, cylinder three 75 pushes push platform 76 to move, and through spring two 744 transmission, push plate 74 moves on straight slide rail 73, blade 02 moves to wheel hub 01 with push plate 74, in this process, top surface of push plate 74 blocks bottom opening of material box 72, preventing blade 02 inside material box 72 from falling, after push plate 74 is blocked by end of straight slide rail 73, push platform 76 continues to move, spring two 744 is compressed, trigger one 74 5 contacts with the contact of trigger two 761, combined with the output of cylinder three 75, it is judged that it is in the loading position. After the loading is completed, the push plate 74 is reset. After the material trough 741 moves to the bottom of the material box 72, the blade 02 inside the material box 72 automatically falls onto the material trough 741. The internal discharge structure of the material box 72 makes the blade 02 fall onto the material trough 741, and the reinforcing rib 03 is in the limit groove 746 to prevent the blade 02 from rotating when the push plate 74 moves. When the blade 02 falls, the posture changes, and the blade 02 gets stuck on the push plate 74, so that the movement of the push plate 74 is blocked. At this time, the contact of trigger one 745 and trigger two 761 contacts, combined with the output of cylinder three 75, it is judged that it is in the alarm position, and an alarm signal is issued to notify the staff to handle it.

[0043] Combined with Figure 3 , Attachment Fig.14 , Attachment Fig.16 and attached Fig.17 As shown, positioning mechanisms 8 are provided on both sides of the stand 71, and the positioning mechanisms 8 include a cylinder 81. A positioning plate 82 is provided at the output end of the cylinder 81, and positioning grooves 83 that fit the edges of the blades are provided at the ends of the two positioning plates 82.

[0044] When the push plate 74 is in the loading position, the cylinder 4 81 pushes the positioning plate 82 forward, so that the positioning groove 83 at the front end of the positioning plate 82 contacts the blade 02 and moves the blade 02 forward on the material groove 741, and the blade 02 is prevented from rotating during the lateral movement through the limiting effect of the reinforcing rib 03 and the limiting groove 746, until the end of the blade 02 is in close contact with the wheel hub. At this time, the positioning groove 83 is completely in close contact with the blade 02, limiting the position of the blade 02 and playing a role of temporary fixation. After a certain amount of welding, the blade 02 has been fixed on the wheel hub 01, and then the push plate 74 and the positioning plate 82 are reset to continue welding.

[0045] During the specific implementation of the present invention, the hub 01 is placed on the positioning table 65, the blade 02 is placed in the material box 72, the cylinder 2 13 drives the moving plate 12 to close, the swing arm 64 moves downward, the pressing plate 63 and the positioning table 65 automatically clamp the hub 01, the linkage rod 123 and the square table 112 fix the position of the swing arm 64, the hub 01 is in an inclined position, so that the blade 02 at the welding position is in a horizontal state, then the cylinder 3 75 pushes the push plate 74 to push the blade 02 close to the hub 01, and the positioning mechanism 8 is used to make the blade 02 close to the hub 01, and then Motor 1 21 drives the swing arm transmission mechanism 3 to rotate, and cooperates with the directional adjustment mechanism 4 to make the moving trajectory of the working end of the laser welding gun 5 close to the weld. The two laser welding guns 5 weld the upper and lower welds. After the welding of this blade 02 is completed, the wheel hub 01 is rotated by the fan clamping mechanism 6, and the photoelectric limiter 15 detects that this blade 02 is in place, and then stops rotating to carry out the loading and welding of the next blade 02. After all the welding is completed, the movable disk 12 is opened, and the swing arm 64 moves up with the movable disk 12 to lift the fan blade 0 to a horizontal position for easy removal.

[0046] The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and do not deviate from the purpose of the invention, they can creatively design a structure and embodiment similar to the technical solution, which should fall within the protection scope of the present invention.

Claims

1. An automatic welding device for exhaust fan blades, comprising a base (1), the base (1) being provided with a fan clamping mechanism (6) for driving the blades (0) to rotate and a movable laser welding gun (5), characterized in that: A fixed plate (11) and a movable plate (12) are provided on the base (1), and a displacement welding mechanism (2) for driving a laser welding gun (5) to move along a welding seam is provided between the fixed plate (11) and the movable plate (12); The displacement welding mechanism (2) comprises a motor 1 (21), a swing arm transmission mechanism (3) and a directional adjustment mechanism (4); the swing arm transmission mechanism (3) comprises a swing arm 1 (31) and a swing arm 2 (32); the swing arm 1 (31) and the swing arm 2 (32) are rotatably arranged on a fixed disk (11) and a movable disk (12) respectively; the motor 1 (21) is connected to the swing arm 1 (31) in power connection; one end of the swing arm 1 (31) is provided with a vertical rod (35) coupled to the end of the swing arm 2 (32); the directional adjustment mechanism (4) comprises two sets of arc tracks (41) and an adjustment platform (42) on which the fixed disk (11) and the movable disk (12) are respectively installed; two laser welding guns (5) are installed on the two adjustment platforms (42); the swing arm 1 (31) and the swing arm 2 (32) synchronously drive the two adjustment platforms (42) to move on the corresponding arc tracks (41); The fan clamping mechanism (6) tilts and clamps the hub (01) so that the blades (02) at the welding position are in a horizontal state, and two symmetrical laser welding guns (5) weld the upper and lower welds, with the moving track of the working end of the laser welding gun (5) being close to the weld.

2. The automatic welding device for exhaust fan blades according to claim 1 is characterized in that: The inner side of the arc track (41) is provided with an arc-shaped second slide groove (411), the adjusting platform (42) is provided with a slider (421) which slides inside the arc-shaped second slide groove (411), two sets of rollers (422) are rotatably provided at both ends of the slider (421), the rollers (422) cooperate with the side walls of the arc-shaped second slide groove (411), a sliding shaft (423) is provided at the top of the slider (421), straight slots (33) are provided at the ends of the swing arm (31) and the swing arm (32), and the sliding shaft (423) is slidably matched with the straight slots (33).

3. The automatic welding device for exhaust fan blades according to claim 1 is characterized in that: A plug post (321) is provided at a through hole at one end of the swing arm (32), a baffle (322) is provided at the top of the plug post (321), a spring (323) is provided between the baffle (322) and the swing arm (32), a slide (324) is provided at the top of the baffle (322), a slot (352) for plugging with the plug post (321) is provided at the top of the vertical rod (35), an arc-shaped slide groove (125) for slidingly cooperating with the slide (324) is provided at the bottom of the movable plate (12), a decoupling groove (126) is provided at one end of the arc-shaped slide groove (125), and when the vertical rod (35) moves to the position of the decoupling groove (126), the plug post (321) leaves the slot (352).

4. The automatic welding device for exhaust fan blades according to claim 3 is characterized in that: The fixed plate (11) is provided with a positioning arc groove (111), the bottom of the vertical rod (35) extends into the positioning arc groove (111), the top of the slide table (324) and the bottom of the vertical rod (35) are respectively provided with a ball table (325) and a ball table (351) which are rotatably provided, the ball table (325) and the ball table (351) are respectively matched with the bottom surface of the positioning arc groove (111) and the top surface of the arc slide groove (125), a cylinder (127) is provided at the decoupling groove (126), and an annular pressing table (128) which is slidably matched with the decoupling groove (126) is provided at the output end of the cylinder (127), and the annular pressing table (128) is abutted against the slide table (324) at the position of the decoupling groove (126).

5. The automatic welding device for exhaust fan blades according to claim 1 is characterized in that: A transmission frame (121) is provided at the rear end of the movable disk (12), and rotating shafts (122) hinged to the base (1) are provided on both sides of the transmission frame (121). A second cylinder (13) is hingedly provided at the rear side of the base (1), and an output end of the second cylinder (13) is hingedly connected to the transmission frame (121). A butt plate (14) abutting against the movable disk (12) is provided at the top of the base (1).

6. The automatic welding device for exhaust fan blades according to claim 5, characterized in that: The fan clamping mechanism (6) comprises a fixed platform (61) and a swing arm (64); the fixed platform (61) is mounted on the bottom of the movable disk (12); the swing arm (64) is hinged to the rotating shaft (122); a second motor (62) is provided on the fixed platform (61); a pressure plate (63) is provided at the output end of the second motor (62); a square platform (112) abutting against the swing arm (64) is provided on the fixed disk (11); a positioning platform (65) is rotatably provided at the end of the swing arm (64); the positioning platform (65) and the pressure plate (63) clamp the hub (01).

7. The automatic welding device for exhaust fan blades according to claim 6, characterized in that: A linkage rod (123) is provided at the bottom of the transmission frame (121), an arc-shaped notch (124) is provided on the linkage rod (123), a follower shaft (642) is provided on the swing arm (64), the follower shaft (642) passes through the arc-shaped notch (124), and the linkage rod (123) drives the swing arm (64) to rotate.

8. The automatic welding device for exhaust fan blades according to claim 1 is characterized in that: A loading mechanism (7) is provided on one side of the base (1), the loading mechanism (7) comprising a stand (71) and a material box (72), the material box (72) being arranged on the stand (71), a straight slide rail (73) being provided at the bottom of the material box (72), a push plate (74) being slidably provided on the straight slide rail (73), a material groove (741) for placing the blade (02) being provided at the top of the push plate (74), the top of the push plate (74) being slidably matched with a groove at the bottom of the material box (72), and a cylinder (75) for driving the push plate (74) to move is provided on the stand (71).

9. The automatic welding device for exhaust fan blades according to claim 8, characterized in that: The push plate (74) is provided with two fixed plates (742) at the bottom, a slide bar (743) is provided between the fixed plates (742), a push platform (76) is provided at the output end of the cylinder three (75), a through hole is provided on the push platform (76) for slidingly cooperating with the slide bar (743), a spring two (744) is provided between the front end of the push platform (76) and the front fixed plate (742), and a trigger one (745) and a trigger two (761) are provided at the front end of the front fixed plate (742) and the push platform (76), respectively.

10. The exhaust fan blade automatic welding device according to claim 8, characterized in that: Positioning mechanisms (8) are provided on both sides of the stand (71), and the positioning mechanism (8) comprises a fourth cylinder (81). A positioning plate (82) is provided at the output end of the fourth cylinder (81), and positioning grooves (83) that fit the edges of the blades are provided at the ends of the two positioning plates (82).

Images