A blade welding and positioning device for blower impeller production

Abstract

This invention discloses a blade welding positioning technology, specifically a blade welding positioning device for blower impeller production. The device includes a support platform with a limiting groove at its upper end. An impeller base is engaged within the limiting groove. Several blades are arranged in a circular array at the upper end of the impeller base. An annular cover is provided at the upper end of each blade. A support frame is fixedly connected to the upper end of the support platform, and a lifting mechanism is installed at the upper end of the support frame. The advantages of this invention are: first, the blade is initially positioned using a second clamping mechanism; then, the outer side of the blade is pushed and calibrated using a positioning mechanism to ensure the blade can accurately engage within the second clamping mechanism; the annular cover presses down on the blade to ensure that both ends of the blade contact the impeller base and the annular cover respectively; finally, a locking mechanism clamps and fixes the positioned blade to prevent blade displacement during welding.

Description

Technical Field

[0001] This invention relates to the field of blade welding positioning technology, specifically to a blade welding positioning device for blower impeller production. Background Technology

[0002] A blower relies on the eccentric rotation of an offset rotor within a cylinder, which causes volume changes between the blades in the rotor slots to draw in, compress, and expel air. As a common gas conveying and pressurizing device, the impeller is the core component of a blower. A typical blower impeller is usually welded together from an impeller base, a top cover, and multiple spatially curved blades. During welding and assembly, it is essential to ensure that all blades are circumferentially evenly distributed between the impeller base and the top cover, have consistent radial extension, and are precisely installed at the correct angles to guarantee good aerodynamic performance and dynamic balance of the impeller.

[0003] Chinese Invention Patent Publication No. CN120680303A discloses a centrifugal blower blade assembly machine, including a base with a feeding slide on one side, a welding unit and a grinding unit on the base, and a rotating seat vertically rotatably connected to the base. The rotating seat has a mounting cavity coaxially formed on its top, the inner diameter of which decreases sequentially from top to bottom. The rotating seat is driven to rotate by a rotating unit mounted on the base. A clamping part engages with the mounting cavity, the outer diameter of which decreases sequentially from top to bottom and cooperates with the mounting cavity. The top of the clamping part has a blind hole-type clearance groove coaxially formed. Multiple blade limiting grooves are arrayed along the axial direction of the periphery of the clamping part. A deformation joint communicating with the lower side of the blade limiting groove is also formed on the periphery of the clamping part. The blade limiting groove and the deformation joint communicate with the clearance groove. The action of the pusher wedge can be linked with the action of the welding unit. When welding is required, the pusher wedge automatically pushes the blade to ensure the welding accuracy of the blade. In addition, the pusher wedge has a certain limit on the blade, so that the blade will not deviate in the direction of the feeding slide during welding, further improving the welding quality.

[0004] However, the aforementioned blade welding process for wind turbine impellers still has certain defects. The typical procedure is as follows: first, the blades are manually placed one by one onto the impeller base; then, the blades are welded to the impeller base to form a semi-finished assembly; next, the top cover is assembled onto the blades, and after manual alignment again, the blades are welded to the top cover. This existing method has significant drawbacks: first, it requires multiple assembly and positioning steps, resulting in low positioning accuracy and poor consistency, easily leading to product dynamic imbalance; second, the process is cumbersome, requiring multiple clamping and alignment steps, resulting in low production efficiency; finally, under the influence of welding thermal stress, the spot-welded blades may shift due to the lack of a positioning device.

[0005] Existing specialized blade welding fixtures exist, but most are complex in structure and often fail to achieve synchronous, rapid, and precise one-time positioning and assembly of the blades, impeller, and cover plate. Therefore, there is an urgent need for a blade welding positioning device for blower impeller production to solve the problems of low positioning accuracy, cumbersome operation steps, and low production efficiency in existing technologies. Summary of the Invention

[0006] The purpose of this invention is to provide a blade welding and positioning device for blower impeller production, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a blade welding and positioning device for blower impeller production, comprising a support platform, a limiting groove being formed at the upper end of the support platform, an impeller base being engaged in the limiting groove, a plurality of blades being arranged in a circular array at the upper end of the impeller base, an annular cover being provided at the upper end of the blades, a support frame being fixedly connected to the upper end of the support platform, a lifting mechanism being installed at the upper end of the support frame, a first clamping mechanism for clamping the annular cover being installed at the lower end of the lifting mechanism, a lifting seat being provided below the lifting mechanism, and the upper end of the lifting seat being fixedly connected to the lower end of the lifting mechanism through a connecting plate;

[0008] A support mechanism is installed below the lifting seat. Above the outside of the support mechanism, a second clamping mechanism for limiting several blades is installed via multiple connecting frames. Several locking mechanisms are installed in a circular array inside the second clamping mechanism. A positioning mechanism for limiting the outer side of several blades is installed inside the support frame.

[0009] As a further embodiment of the present invention, the lifting mechanism includes a hydraulic cylinder fixedly installed on the upper end of the support frame, a lifting plate fixedly connected to the lower end of the inner rod of the hydraulic cylinder, and a sliding rod symmetrically fixedly connected to the upper end of the lifting plate, the sliding rod extending upward through the upper end of the support frame.

[0010] As a further embodiment of the present invention, the first clamping mechanism includes an inner support ring fixedly connected to the lower end of the lifting plate. The lower end of the lifting plate is fixedly connected to a plurality of fixed side plates in a circular array outside the inner support ring. A first electric push rod is fixedly installed through the side of each fixed side plate. The end of the inner rod of the first electric push rod faces the inner support ring. A clamping seat is fixedly connected to the end of the inner rod of the first electric push rod. A guide plate is symmetrically fixedly connected to the side of the clamping seat away from the inner support ring. The guide plate passes through the fixed side plate.

[0011] As a further embodiment of the present invention, the upper end of the connecting plate is fixedly connected to the bottom of the lifting plate, and the lower end of the connecting plate is fixedly connected to the upper end of the lifting seat. The support mechanism includes a lower limit seat disposed below the lifting seat. The lower end of the lower limit seat contacts the upper surface of the impeller base. Multiple light rods are fixedly connected to the upper end of the lower limit seat in a circular array. The upper end of the light rods passes through the lifting seat upward and is fixedly sleeved with an annular stop block. A buffer spring is sleeved on the lower end of the outer side of the light rod. The two ends of the buffer spring abut against the lifting seat and the lower limit seat, respectively.

[0012] As a further embodiment of the present invention, the outer side of the lower limit seat is fixedly connected to the connecting frame, and the second clamping mechanism includes an annular plate fixedly installed on the upper end of the connecting frame. The outer side of the annular plate is provided with a plurality of positioning slots in an annular array. The inner side of each positioning slot is provided with a shrinkage groove. The inner sidewall of the shrinkage groove is provided with a fan-shaped movable groove. The locking mechanism is installed in adjacent shrinkage grooves and fan-shaped movable grooves.

[0013] As a further embodiment of the present invention, the upper and lower sides of the annular plate are fixedly connected with multiple reinforcing seats in an annular array. The reinforcing seats are distributed on the outside of the positioning slot, and the reinforcing seats are located at the end of the positioning slot closer to the support mechanism.

[0014] As a further embodiment of the present invention, the locking mechanism includes a pressing block slidably installed in the shrinkage groove, a fan-shaped movable block fixedly connected to the side of the pressing block near the fan-shaped movable groove, one end of the movable block passing through the fan-shaped movable groove and extending to the outside, a roller being rotatably installed on the end of the movable block outside the fan-shaped movable groove via a rotating shaft, and a reset spring abutting between the side of the movable block near the positioning slot and the fan-shaped movable groove.

[0015] As a further embodiment of the present invention, a protective pad is fixedly installed at one end of the clamping block near the positioning slot, and an extrusion plate is provided on the side of the movable block where the roller is installed. The extrusion plate is fixedly installed on the side of the lifting seat, and an extrusion slope is formed by cutting off the lower end of the extrusion plate. The extrusion plate is in rolling connection with the roller.

[0016] As a further embodiment of the present invention, the positioning mechanism includes an outer limiting ring sleeved on the outside of the blade. Multiple baffles are fixedly connected in a ring array on the inner side of the outer limiting ring. The baffles abut against the side of the blade away from the positioning slot. A transmission plate is symmetrically fixedly connected to the outer side of the outer limiting ring. The end of the transmission plate away from the outer limiting ring is slidably connected to the inner side of the support frame. A second electric push rod is fixedly connected to the upper end of the transmission plate. The second electric push rod is fixedly installed on the inner side wall of the support frame.

[0017] The upper end of the support platform has an annular groove adapted to the outer limiting ring on the outside of the limiting groove. Multiple slots adapted to the baffle are arranged in a ring array between the limiting groove and the annular groove. The slots pass through the support platform. Grooves adapted to the transmission plate are symmetrically arranged on the side of the annular groove.

[0018] As a further embodiment of the present invention, a fixing mechanism for locking the impeller base is installed in the limiting groove. The fixing mechanism includes suction cups fixedly installed in a ring array in the limiting groove. An air guide pipe is fixedly installed at the lower end of the suction cups, and the air guide pipe is connected to the negative pressure pump through a hose.

[0019] The beneficial effects of this invention are:

[0020] 1. When assembling the impeller, first, the impeller base is clamped in the limiting groove at the upper end of the support platform, and the annular upper cover is clamped and fixed by the first clamping mechanism; after the lifting mechanism drives the lower end of the lower limit seat in the support mechanism to contact the upper surface of the impeller base, the operation of the lifting mechanism stops; several blades are inserted into the multiple positioning slots in the second clamping mechanism in a ring shape, and at the same time, the lower end of the blades contacts the upper surface of the impeller base, completing the initial installation of the blades.

[0021] 2. After the blades are initially installed, the multiple baffles in the positioning mechanism move upward along the outer surfaces of several blades. The baffles push and calibrate the position of the blades, so that the blades can be accurately and firmly inserted into the positioning slots of the second clamping mechanism. This ensures that the blades are accurately positioned on the impeller base to be welded, guaranteeing the accuracy of subsequent welding.

[0022] 3. The lifting mechanism drives the annular top cover and the lifting seat to move downwards until the annular top cover contacts the upper end of the blade. During this process, the pressing plate pushes the locking mechanism to move, so that the locking mechanism further clamps and locks the blade. By positioning the blade from multiple directions, the accuracy of the blade position is ensured.

[0023] 4. First, the blade is initially positioned using the second clamping mechanism. Then, the outer side of the blade is pushed and aligned using the positioning mechanism to ensure that the blade can be accurately inserted into the second clamping mechanism. The blade is then pressed down using the annular cover to ensure that both ends of the blade plate can contact the impeller base and the annular cover respectively. Finally, the positioned blade is clamped and fixed using the locking mechanism to prevent the blade from shifting during welding, thereby ensuring the welding accuracy of the blade. This method allows for simple and efficient assembly of the impeller base, blade, and annular cover, while also providing continuous clamping and locking, ensuring processing accuracy and greatly improving work efficiency. Attached Figure Description

[0024] Figure 1This is a perspective view of the blade welding and positioning device for blower impeller production according to the present invention;

[0025] Figure 2 This is a side sectional view of the blade welding and positioning device for blower impeller production of the present invention;

[0026] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0027] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point B;

[0028] Figure 5 This is an exploded view of the blade welding and positioning device for blower impeller production of the present invention;

[0029] Figure 6 This is a side sectional view of the support platform and impeller base structure of the present invention;

[0030] Figure 7 This is a perspective view of the first clamping mechanism, the annular upper cover, and the positioning mechanism of the present invention;

[0031] Figure 8 This is a perspective view of the support mechanism and the second clamping mechanism of the present invention;

[0032] Figure 9 This is a perspective view of the support mechanism of the present invention;

[0033] Figure 10 This is a cross-sectional view of the blade, the second clamping mechanism, and the locking mechanism of the present invention;

[0034] Figure 11 for Figure 10 Enlarged schematic diagram of the structure at point C;

[0035] Figure 12 This is an exploded view of the blade, support mechanism, second clamping mechanism, and locking mechanism of the present invention;

[0036] Figure 13 This is a perspective view of the locking mechanism of the present invention;

[0037] Figure 14 This is a partial schematic diagram of the second clamping mechanism, blade, and baffle of the present invention.

[0038] In the diagram: 1. Support platform; 11. Limiting groove; 12. Annular groove; 13. Slot; 14. Impeller base; 15. Blade; 16. Annular top cover; 17. Suction cup; 18. Groove; 2. Support frame; 21. Hydraulic cylinder; 22. Lifting plate; 23. Slide rod; 24. Inner support ring; 3. Fixed side plate; 31. First electric push rod; 32. Clamping seat; 33. Guide plate; 4. Lifting seat; 41. Connection 42. Lower limit seat; 43. Smooth rod; 44. Buffer spring; 45. Connecting frame; 46. Extrusion plate; 5. Annular plate; 51. Positioning slot; 52. Shrinkage groove; 53. Fan-shaped movable groove; 54. Reinforcing seat; 6. Pressing block; 61. Protective pad; 62. Movable block; 63. Roller; 64. Reset spring; 7. Outer limit ring; 71. Baffle; 72. Transmission plate; 73. Second electric push rod. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figures 1 to 14 The present invention provides a technical solution: a blade welding and positioning device for blower impeller production, including a support platform 1, a limiting groove 11 is formed at the upper end of the support platform 1, an impeller base 14 is clamped in the limiting groove 11, the upper surface of the impeller base 14 is higher than the upper surface of the support platform 1, a number of blades 15 are arranged in a ring array at the upper end of the impeller base 14, an annular cover 16 is provided at the upper end of the blades 15, a support frame 2 is fixedly connected to the upper end of the support platform 1, a lifting mechanism is installed at the upper end of the support frame 2, a first clamping mechanism for clamping the annular cover 16 is installed at the lower end of the lifting mechanism, a lifting seat 4 is provided below the lifting mechanism, and the upper end of the lifting seat 4 is fixedly connected to the lower end of the lifting mechanism through a connecting plate 41.

[0041] A support mechanism is installed below the lifting seat 4. A second clamping mechanism for limiting several blades 15 is installed above the outer side of the support mechanism via multiple connecting frames 45. Several locking mechanisms are installed in a circular array inside the second clamping mechanism. The locking mechanisms are used to lock the blades 15. A positioning mechanism for limiting the outer side of several blades 15 is installed inside the support frame 2.

[0042] When assembling the impeller base 14, blades 15 and annular cover 16, the impeller base 14 is first clamped in the limiting groove 11 at the upper end of the support platform 1, and the annular cover 16 is clamped and fixed by the first clamping mechanism at the lower end of the lifting mechanism.

[0043] The lifting mechanism drives the annular upper cover 16, lifting seat 4, support mechanism, second clamping mechanism and locking mechanism to move downward. When the lower end of the support mechanism contacts the upper surface of the impeller base 14, the support mechanism and the second clamping mechanism can no longer move downward, and the operation of the lifting mechanism stops.

[0044] Several blades 15 are sequentially inserted into the second clamping mechanism. At the same time, after the lower end of the blades 15 contacts the upper surface of the impeller base 14, the positioning mechanism moves upward along the outer side of the blades 15 to calibrate the position of the blades 15. This ensures that the blades 15 can be accurately and firmly inserted into the second clamping mechanism. The shape of the second clamping mechanism is set according to production needs so that the blades 15 can be placed at the required angle. This ensures that after the blades 15 are inserted, they are accurately positioned on the impeller base 14 to be welded, thus ensuring the accuracy of subsequent welding.

[0045] Then, the lifting mechanism drives the annular upper cover 16 and the lifting seat 4 to move downward until the annular upper cover 16 contacts the upper end of the blade 15. At this time, the locking mechanism in the second clamping mechanism further clamps and locks the blade 15. By positioning the blade 15 from multiple directions, the accuracy of the blade 15 position is ensured.

[0046] First, the blade 15 is initially positioned by the second clamping mechanism so that the blade 15 is in the position to be welded on the impeller base 14. Then, the blade 15 is pushed by the positioning mechanism to ensure that the blade 15 can be accurately inserted into the second clamping mechanism. Finally, the positioning blade 15 is clamped and fixed by the locking mechanism to prevent the blade 15 from shifting during the welding process, thereby ensuring the welding accuracy of the blade 15.

[0047] Please see Figure 1 and Figure 2 The lifting mechanism includes a hydraulic cylinder 21 fixedly installed on the upper end of the support frame 2. The hydraulic cylinder 21 extends downward through the upper end of the support frame 2. The lower end of the inner rod of the hydraulic cylinder 21 is fixedly connected to a lifting plate 22. The upper end of the lifting plate 22 is symmetrically fixedly connected to a sliding rod 23. The sliding rod 23 extends upward through the upper end of the support frame 2, and the sliding rod 23 is slidably connected to the support frame 2.

[0048] The lifting plate 22 moves up and down by extending and retracting the inner rod of the hydraulic cylinder 21. The lifting plate 22 drives the slide rod 23 to slide up and down along the upper end of the support frame 2, thereby enabling the lifting plate 22 to move up and down stably.

[0049] Please see Figure 2 , Figure 3 , Figure 5 and Figure 7The first clamping mechanism includes an inner support ring 24 fixedly connected to the lower end of the lifting plate 22. Multiple fixed side plates 3 are fixedly connected in a ring array to the lower end of the lifting plate 22 outside the inner support ring 24. A first electric push rod 31 is fixedly installed through the side of each fixed side plate 3. The end of the inner rod of the first electric push rod 31 faces the inner support ring 24. A clamping seat 32 is fixedly connected to the end of the inner rod of the first electric push rod 31. An anti-slip rubber pad is fixedly installed on the side of the clamping seat 32 near the inner support ring 24. A guide plate 33 is symmetrically fixedly connected to the side of the clamping seat 32 away from the inner support ring 24. The guide plate 33 passes through the fixed side plate 3 and is slidably connected to the fixed side plate 3.

[0050] The extension and retraction of the inner rod of the first electric push rod 31 drives the clamping seat 32 to move closer to or further away from the inner support ring 24, thereby clamping or releasing the annular upper cover 16. When the clamping seat 32 moves, it drives the guide plate 33 to slide along the fixed side plate 3, thereby enabling the clamping seat 32 to move stably.

[0051] When clamping and fixing the annular top cover 16, the annular top cover 16 is sleeved on the outside of the inner support ring 24 from bottom to top, so that the inner side of the annular top cover 16 is in contact with the outer side of the inner support ring 24. At this time, the annular top cover 16 is between the inner support ring 24 and the clamping seat 32.

[0052] The inner rod of the first electric push rod 31 extends and drives the clamping seat 32 to approach the annular cover 16, so that the clamping seat 32 and the anti-slip rubber pad are tightly attached to the outer side of the annular cover 16. The annular cover 16 is clamped and fixed by the cooperation of multiple clamping seats 32. The anti-slip rubber pad can prevent the clamping seat 32 from slipping during the clamping process of the annular cover 16, and at the same time prevent the clamping force from being too large and damaging the annular cover 16. The inner support ring 24 supports and shapes the annular cover 16, and prevents the annular cover 16 from being deformed or damaged by excessive clamping force.

[0053] Please see Figure 2 , Figure 4 , Figure 5 , Figures 8 to 10 , Figure 12The upper end of the connecting plate 41 is fixedly connected to the bottom of the lifting plate 22, and the lower end of the connecting plate 41 is fixedly connected to the upper end of the lifting seat 4. The connecting plate 41 is located inside the inner support ring 24. The support mechanism includes a lower limit seat 42 located below the lifting seat 4. The lower end of the lower limit seat 42 contacts the upper surface of the impeller base 14. The ground of the lower limit seat 42 is adapted to the upper surface of the impeller base 14, so that the lower limit seat 42 can be accurately locked on the upper end of the impeller base 14. Multiple light rods 43 are fixedly connected to the upper end of the lower limit seat 42 in a ring array. The upper end of the light rod 43 passes through the lifting seat 4 and is fixedly sleeved with a ring stop. The light rod 43 and the lifting seat 4 are slidably connected up and down. A buffer spring 44 is sleeved on the lower end of the outer side of the light rod 43. The two ends of the buffer spring 44 abut against the lifting seat 4 and the lower limit seat 42 respectively. The buffer spring 44 applies a downward elastic force to the lower limit seat 42.

[0054] When the lifting plate 22 in the lifting mechanism moves downward, the lifting plate 22 drives the lifting seat 4 to move downward through the connecting plate 41. Initially, under the gravity of the lower limit seat 42 and the guide rod 43, the lower limit seat 42 moves away from the lifting seat 4. At this time, the annular stop block abuts against the upper end of the lifting seat 4 to prevent the guide rod 43 from slipping off the lifting seat 4. The lifting seat 4 drives the lower limit seat 42 to move downward synchronously through the guide rod 43 until the lower end of the lower limit seat 42 abuts against the upper surface of the impeller base 14. At this time, the downward movement of the lifting plate 22 is stopped, and the blade 15 is installed.

[0055] As the lifting plate 22 continues to move downward, the lower limit seat 42 is unable to move further downward because its lower end is in contact with the impeller base 14. At this time, when the lifting plate 22 drives the lifting seat 4 to move downward through the connecting plate 41, the lifting seat 4 slides downward along the smooth rod 43 and the lifting seat 4 compresses the buffer spring 44.

[0056] As the lifting plate 22 continues to move downward, it drives the annular upper cover 16 to move downward synchronously through the first clamping mechanism until the annular upper cover 16 contacts the upper ends of the multiple blades 15. At this point, the lifting plate 22 stops moving downward.

[0057] Please see Figure 8 , Figures 10 to 12 , Figure 14The outer side of the lower limit seat 42 is fixedly connected to the connecting frame 45. Multiple connecting frames 45 are fixedly installed in a ring array on the outer side of the lower limit seat 42. The second clamping mechanism includes an annular plate 5 fixedly installed on the upper end of the connecting frame 45. The diameter of the annular plate 5 is smaller than the inner diameter of the annular upper cover 16, so that after the impeller is welded, the second clamping mechanism can be pulled upward from inside the impeller. The outer side of the annular plate 5 is provided with several positioning slots 51 in a ring array. The shape of the positioning slots 51 is adapted to the shape of the blade 15 to ensure that the blade 15 can... The blades are accurately inserted into the positioning slots 51. The number of positioning slots 51 is the same as the number of blades 15 on the impeller. Rubber pads are fixedly installed on the two inner side walls of the positioning slots 51. Each positioning slot 51 has a shrinkage groove 52 on its inner side. A fan-shaped movable groove 53 is opened through the inner side wall of the shrinkage groove 52. The opening of the fan-shaped movable groove 53 is located on the inner side of the annular plate 5. The number of locking mechanisms is the same as the number of blades 15 and the number of shrinkage grooves 52. The locking mechanisms are installed in adjacent shrinkage grooves 52 and fan-shaped movable grooves 53.

[0058] The upper and lower sides of the annular plate 5 are fixedly connected with multiple reinforcing seats 54 in an annular array. The reinforcing seats 54 are distributed on the outside of the positioning slot 51, and the reinforcing seats 54 are located at the end of the positioning slot 51 near the support mechanism. The side of the reinforcing seat 54 near the blade 15 has a matching reinforcing groove, and the blade 15 is engaged with the reinforcing groove.

[0059] When it is necessary to clamp the blade 15, insert the blade 15 into the positioning slot 51 until one side of the blade 15 contacts the innermost side of the positioning slot 51. At this time, the blade 15 is inserted into the two reinforcing seats 54 on the upper and lower sides of the positioning slot 51, thereby further clamping the blade 15 and preventing the blade 15 from shifting. At the same time, the bottom of the blade 15 contacts the upper surface of the impeller base 14. The impeller base 14 consists of an annular frame and a conical cylinder. At this time, the blade 15 is on the upper surface of the annular frame, thus completing the installation and positioning of the blade 15.

[0060] Please see Figures 10 to 13 The locking mechanism includes a pressing block 6 that is slidably installed in the shrinkage groove 52. A fan-shaped movable block 62 is fixedly connected to the side of the pressing block 6 near the fan-shaped movable groove 53. One end of the movable block 62 passes through the fan-shaped movable groove 53 and extends to the outside. A roller 63 is rotatably installed on the side of the movable block 62 outside the fan-shaped movable groove 53 via a rotating shaft. An installation groove is opened on the side of the movable block 62. The roller 63 is rotatably installed in the installation groove via a rotating shaft. A reset spring 64 abuts between the side of the movable block 62 near the positioning slot 51 and the fan-shaped movable groove 53. The reset spring 64 applies a spring force to the movable block 62, causing the movable block 62 to tend to move away from the blade 15.

[0061] A protective pad 61 is fixedly installed at one end of the clamping block 6 near the positioning slot 51. A pressing plate 46 is provided on the side of the movable block 62 where the roller 63 is installed. The pressing plate 46 is fixedly installed on the side of the lifting seat 4. The lower end of the pressing plate 46 is cut off to form a pressing slope, and the pressing plate 46 is in rolling connection with the roller 63.

[0062] Initially, the extrusion plate 46 is positioned above the roller 63, and the roller 63 is aligned vertically with the extrusion ramp.

[0063] After the blade 15 is installed, the lifting plate 22 in the lifting mechanism continues to move downward, and the lifting seat 4 slides downward along the light rod 43. At this time, the lifting seat 4 drives the extrusion plate 46 to move downward synchronously. The extrusion slope at the lower end of the extrusion plate 46 first contacts the roller 63, and pushes the roller 63 to move through the extrusion slope until the side of the extrusion plate 46 contacts the roller 63, and then the roller 63 stops moving.

[0064] As the roller 63 moves, it drives the movable block 62 to slide along the fan-shaped movable groove 53. The movable block 62 presses the reset spring 64. At the same time, the movable block 62 drives the pressing block 6 to move outward of the positioning slot 51. The pressing block 6 drives the protective pad 61 to move closer to the blade 15. When the roller 63 rolls into contact with the side of the pressing plate 46, the protective pad 61 tightly abuts against the side of the blade 15, thereby locking the blade 15. The protective pad 61 prevents the blade 15 from being damaged due to excessive locking force.

[0065] Please see Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 14 The positioning mechanism includes an outer limiting ring 7 sleeved on the outside of the blade 15. Multiple baffles 71 are fixedly connected in a ring array on the inner side of the outer limiting ring 7. The number of baffles 71 is the same as that of the blade 15. The baffles 71 abut against the side of the blade 15 away from the positioning slot 51. A transmission plate 72 is symmetrically fixedly connected to the outer side of the outer limiting ring 7. The end of the transmission plate 72 away from the outer limiting ring 7 is slidably connected to the inner side of the support frame 2. A second electric push rod 73 is fixedly connected to the upper end of the transmission plate 72. The second electric push rod 73 is fixedly installed on the inner wall of the support frame 2.

[0066] The upper end of the support platform 1 has an annular groove 12 adapted to the outer limiting ring 7 on the outside of the limiting groove 11. Multiple slots 13 adapted to the baffle 71 are arranged in an annular array between the limiting groove 11 and the annular groove 12. The number of slots 13 is the same as the number of blades 15. The slots 13 penetrate the support platform 1 and connect the limiting groove 11 and the annular groove 12 through the slots 13. The sides of the annular groove 12 are symmetrically provided with grooves 18 adapted to the transmission plate 72.

[0067] Initially, the outer limiting ring 7 is engaged in the annular groove 12, the baffle 71 is inserted through into the adjacent slot 13, and the transmission plate 72 is engaged in the groove 18. At this time, the inner rod of the second electric push rod 73 is in the extended state.

[0068] Both ends of the baffle 71 near the blade 15 are cut off to form a pushing slope. When the blade 15 is not accurately inserted into the positioning slot 51, the pushing slope at the end of the baffle 71 first contacts the blade 15 and pushes the blade 15 into the positioning slot 51 through the pushing slope.

[0069] After the blade 15 is initially installed, the inner rod of the second electric push rod 73 is retracted, causing the transmission plate 72 to move upward. The transmission plate 72 drives the baffle 71 to move upward through the outer limit ring 7, so that the baffle 71 slides from bottom to top along the side of the blade 15 away from the positioning slot 51, thereby pushing the blade 15 to accurately engage in the positioning slot 51, and further positioning the blade 15.

[0070] Please see Figure 5 and Figure 6 The limiting groove 11 is equipped with a fixing mechanism for locking the impeller base 14. The fixing mechanism includes suction cups 17 fixedly installed in a ring array in the limiting groove 11. An air guide pipe is fixedly installed at the lower end of the suction cups 17. The air guide pipe is connected to a negative pressure pump through a hose. The negative pressure pump controls the suction cups 17 to perform negative pressure adsorption locking and release adsorption locking on the impeller base 14.

[0071] The fixing mechanism can also be replaced with other clamping mechanisms that can lock the impeller base 14.

[0072] Working principle: When assembling the impeller, the impeller base 14 is first clamped in the limiting groove 11 at the upper end of the support platform 1. The impeller base 14 is then attracted and locked by the suction cup 17. At this time, the lifting mechanism, the first clamping mechanism, the support mechanism and the second clamping mechanism are all at the top, and the positioning mechanism is retracted into the support platform 1.

[0073] The annular upper cover 16 is sleeved onto the outside of the inner support ring 24 from bottom to top, and the annular upper cover 16 is clamped and fixed by the first clamping mechanism.

[0074] Start the hydraulic cylinder 21 to extend its inner rod downwards, causing the lifting mechanism to move the annular upper cover 16, lifting seat 4, support mechanism, second clamping mechanism and locking mechanism downwards. When the lower end of the lower limit seat 42 in the support mechanism contacts the upper surface of the impeller base 14, the operation of the lifting mechanism stops.

[0075] Several blades 15 are sequentially inserted into multiple positioning slots 51 in the second clamping mechanism in a ring, while the lower end of the blades 15 contacts the upper surface of the impeller base 14. After the blades 15 are initially installed, the inner rod of the second electric push rod 73 is retracted, causing multiple baffles 71 in the positioning mechanism to move upward along the outer side of the blades 15, thereby pushing and calibrating the position of the blades 15, so that the blades 15 can be accurately and firmly inserted into the positioning slots 51 of the second clamping mechanism, and the blades 15 can be accurately positioned on the impeller base 14 to be welded, ensuring the accuracy of subsequent welding.

[0076] The inner rod of the hydraulic cylinder 21 continues to extend downward, and the lifting mechanism drives the annular upper cover 16 and the lifting seat 4 to move downward until the annular upper cover 16 contacts the upper end of the blade 15. During this process, the lifting seat 4 drives the extrusion plate 46 to move downward, and the extrusion plate 46 pushes the locking mechanism to move, so that the locking mechanism further clamps and locks the blade 15. By positioning the blade 15 from multiple directions, the accuracy of the blade 15 position is ensured.

[0077] First, the blade 15 is initially positioned by the second clamping mechanism so that the blade 15 is in the position to be welded on the impeller base 14. Then, the outer side of the blade 15 is pushed and calibrated by the positioning mechanism to ensure that the blade 15 can be accurately inserted into the second clamping mechanism. The blade 15 is pressed down by the annular upper cover 16 to ensure that both ends of the blade 15 can contact the impeller base 14 and the annular upper cover 16 respectively. Finally, the positioned blade 15 is clamped and fixed by the locking mechanism to prevent the blade 15 from shifting during the welding process, thereby ensuring the welding accuracy of the blade 15.

[0078] The second clamping mechanism can effectively clamp and position the blade 15 with a certain curvature. The shape of the positioning slot 51 in the second clamping mechanism is adapted to the curvature of one end of the blade 15, which can well adapt to and clamp the blade 15. The positioning mechanism further restricts and positions the blade 15, thereby ensuring the accuracy of assembly and the precision of welding.

[0079] During the welding process, the following methods can be used: TIG welding, using a long-necked, small-diameter nozzle welding torch or an elbow welding torch; or micro-beam plasma welding, using a slender plasma welding torch. These welding methods are suitable for working in confined spaces and will not hinder the welding operation due to the small gaps between the blades.

[0080] After the blade 15 is welded, the welded area of ​​the blade 15 can be ground by the grinding device. When the first clamping mechanism, the second clamping mechanism and the positioning mechanism clamp and position the blade 15, they do not contact the two ends of the blade 15, so they will not hinder the welding and grinding of the blade 15.

[0081] After processing, the positioning mechanism is moved downwards to reset, the first clamping mechanism is released from clamping the annular cover 16, and the inner rod of the hydraulic cylinder 21 is retracted, causing the lifting mechanism to move the first clamping mechanism and the lifting seat 4 upwards. At this time, the support mechanism and the second clamping mechanism do not move. The lifting seat 4 causes the pressing plate 46 to separate from the locking mechanism. Under the action of the spring force of the reset spring 64, the locking mechanism is released from locking the blade 15. At this time, the lifting mechanism continues to move upwards. When the lifting seat 4 contacts the annular stop, the lifting seat 4 causes the support mechanism and the second clamping mechanism to move upwards synchronously, so that the second clamping mechanism slides along the blade 15 from bottom to top until the two are far apart, thereby resetting the lifting mechanism, the first clamping mechanism, the support structure and the second clamping mechanism. Then the welded impeller is taken out, waiting for the next welding.

[0082] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blade welding positioning device for blower impeller production, comprising a support table (1), characterized in that: The upper end of the support platform (1) has a limiting groove (11), and an impeller base (14) is snapped into the limiting groove (11). Several blades (15) are arranged in a ring array on the upper end of the impeller base (14). An annular cover (16) is provided on the upper end of the blades (15). A support frame (2) is fixedly connected to the upper end of the support platform (1). A lifting mechanism is installed on the upper end of the support frame (2). A first clamping mechanism for clamping the annular cover (16) is installed on the lower end of the lifting mechanism. A lifting seat (4) is provided below the lifting mechanism. The upper end of the lifting seat (4) is fixedly connected to the lower end of the lifting mechanism through a connecting plate (41). A support mechanism is installed below the lifting seat (4). A second clamping mechanism for limiting several blades (15) is installed above the outer side of the support mechanism via multiple connecting frames (45). Several locking mechanisms are installed in a ring array inside the second clamping mechanism. A positioning mechanism for limiting the outer side of several blades (15) is installed inside the support frame (2). The lifting mechanism includes a hydraulic cylinder (21) fixedly installed on the upper end of the support frame (2). The lower end of the inner rod of the hydraulic cylinder (21) is fixedly connected to a lifting plate (22). The upper end of the connecting plate (41) is fixedly connected to the bottom of the lifting plate (22), and the lower end of the connecting plate (41) is fixedly connected to the upper end of the lifting seat (4). The support mechanism includes a lower limit seat (42) set below the lifting seat (4). The lower end of the lower limit seat (42) contacts the upper surface of the impeller base (14). The second clamping mechanism includes an annular plate (5) fixedly installed on the upper end of the connecting frame (45). The outer side of the annular plate (5) is provided with a plurality of positioning slots (51) in an annular array. The inner side of each positioning slot (51) is provided with a shrinkage groove (52). The inner side wall of the shrinkage groove (52) is provided with a fan-shaped movable groove (53). The locking mechanism is installed in adjacent shrinkage grooves (52) and fan-shaped movable grooves (53). The locking mechanism includes a pressing block (6) that is slidably installed in the shrinkage groove (52). A fan-shaped movable block (62) is fixedly connected to the side of the pressing block (6) near the fan-shaped movable groove (53). One end of the movable block (62) passes through the fan-shaped movable groove (53) and extends to the outside. A roller (63) is rotatably installed on the end of the movable block (62) outside the fan-shaped movable groove (53) through a rotating shaft. A reset spring (64) abuts against the side of the movable block (62) near the positioning slot (51) and the fan-shaped movable groove (53). The movable block (62) is provided with a pressing plate (46) on one side where the roller (63) is installed. The pressing plate (46) is fixedly installed on the side of the lifting seat (4). The lower end of the pressing plate (46) is cut off to form a pressing slope, and the pressing plate (46) is in rolling connection with the roller (63).

2. The blade welding positioning device for the production of a blower impeller according to claim 1, characterized in that: The upper end of the lifting plate (22) is symmetrically fixedly connected with a sliding rod (23), which extends upward through the upper end of the support frame (2).

3. The blade welding positioning device for the production of a blower impeller according to claim 2, characterized in that: The first clamping mechanism includes an inner support ring (24) fixedly connected to the lower end of the lifting plate (22). The lower end of the lifting plate (22) is fixedly connected to multiple fixed side plates (3) in a ring array outside the inner support ring (24). Each fixed side plate (3) is fixedly installed with a first electric push rod (31) through it. The end of the inner rod of the first electric push rod (31) faces the inner support ring (24). The end of the inner rod of the first electric push rod (31) is fixedly connected to a clamping seat (32). A guide plate (33) is symmetrically fixedly connected to the side of the clamping seat (32) away from the inner support ring (24). The guide plate (33) passes through the fixed side plate (3).

4. The blade welding positioning device for the production of a blower impeller according to claim 1, characterized in that: The upper end of the lower limit seat (42) is fixedly connected with multiple light rods (43) in a ring array. The upper end of the light rod (43) passes through the lifting seat (4) and is fixedly sleeved with a ring block. The lower end of the outer side of the light rod (43) is sleeved with a buffer spring (44). The two ends of the buffer spring (44) abut against the lifting seat (4) and the lower limit seat (42) respectively.

5. The blade welding and positioning device for blower impeller production according to claim 4, characterized in that: The outer side of the lower limit seat (42) is fixedly connected to the connecting frame (45).

6. The blade welding and positioning device for blower impeller production according to claim 1, characterized in that: The upper and lower sides of the annular plate (5) are fixedly connected with multiple reinforcing seats (54) in an annular array. The reinforcing seats (54) are distributed on the outside of the positioning slot (51), and the reinforcing seats (54) are located at the end of the positioning slot (51) near the support mechanism.

7. The blade welding and positioning device for blower impeller production according to claim 1, characterized in that: A protective pad (61) is fixedly installed at one end of the clamping block (6) near the positioning slot (51).

8. The blade welding and positioning device for blower impeller production according to claim 1, characterized in that: The positioning mechanism includes an outer limiting ring (7) sleeved on the outside of the blade (15). Multiple baffles (71) are fixedly connected in a ring array on the inner side of the outer limiting ring (7). The baffles (71) abut against the side of the blade (15) away from the positioning slot (51). A transmission plate (72) is symmetrically fixedly connected on the outer side of the outer limiting ring (7). The end of the transmission plate (72) away from the outer limiting ring (7) is slidably connected up and down to the inner side of the support frame (2). A second electric push rod (73) is fixedly connected to the upper end of the transmission plate (72). The second electric push rod (73) is fixedly installed on the inner wall of the support frame (2). The upper end of the support platform (1) has an annular groove (12) adapted to the outer limit ring (7) on the outside of the limiting groove (11). Multiple slots (13) adapted to the baffle (71) are arranged in an annular array between the limiting groove (11) and the annular groove (12). The slots (13) penetrate the support platform (1). The sides of the annular groove (12) are symmetrically provided with grooves (18) adapted to the transmission plate (72).

9. The blade welding and positioning device for blower impeller production according to claim 1, characterized in that: The limiting groove (11) is equipped with a fixing mechanism for locking the impeller base (14). The fixing mechanism includes suction cups (17) fixedly installed in the limiting groove (11) in a ring array. The lower end of the suction cups (17) is fixedly installed with an air guide pipe, which is connected to the negative pressure pump through a hose.

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