Centrifugal fan laser welding fixing clamp

Abstract

The centrifugal fan laser welding fixing clamp comprises a movable seat, a support with the angle capable of being adjusted is arranged on the movable seat, a conical table is rotationally installed on the support, a pull rod arranged in a sliding mode is arranged on the conical table in a penetrating mode, and the pull rod is sleeved with a sleeve in sliding connection with the pull rod. A plurality of pressing rods are fixed outside the mounting plate, when the centrifugal fan blades are welded, the support is rotated to be in a vertical state, the assembled centrifugal fan impeller is arranged on the conical table in a sleeving mode, the sleeve is installed on the pull rod, the pull rod moves to drive the sleeve, the mounting plate and the pressing rods to move, and the assembled centrifugal fan impeller is pressed. The support rotates by 90 degrees to enable the axis of the impeller to be horizontal, and the two ends of the blade wait to be welded. According to the impeller welding device, an assembled impeller can be clamped and positioned, the welding quality of the impeller is ensured, the impeller can rotate, insertion claws on the two sides can be welded at the same time, and the welding efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal fan processing, and in particular to a centrifugal fan laser welding fixing fixture. Background Art

[0002] The aluminum alloy impeller of the airfoil centrifugal fan is assembled by a front disc 29, a rear disc 31, and a plurality of blades 32 and then laser welded. Usually, a socket 30 is processed on the disc surface of the front disc 29 and the rear disc 31, and claws 33 (mostly elliptical or square) matching the socket 30 are formed on both sides of the blade 32. Before welding, a special fixing fixture is required to position the front disc 29, the rear disc 31, and the plurality of blades 3. Generally, the positioning and installation are realized in the order of the rear disc 31, the blades 32, and the front disc 29. Specifically, Figure 5 , Figure 6 shown.

[0003] After the rear disc 31, the blades 32, and the front disc 29 are assembled in sequence, the claws 33 need to be welded and fixed to the front disc 29 and the rear disc 31; the current method is mostly to assemble and weld the rear disc 31 and the blades 32, and then assemble the front disc 29 and the blades 32 again for welding, which reduces the efficiency of blade welding and is inconvenient to position the assembled blades 32, which will lead to reduced welding quality; for this reason, the present application proposes a centrifugal fan laser welding fixing fixture. Summary of the invention

[0004] The purpose of the present invention is to solve the above technical problems and to propose a centrifugal fan laser welding fixing fixture.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A centrifugal fan laser welding fixing fixture comprises a movable seat, the movable seat is provided with a bracket whose angle can be adjusted, the bracket is rotatably mounted with a conical table, a sliding pull rod passes through the conical table, the outer part of the pull rod is sleeved with a sleeve slidably connected to the pull rod, the outer part of the sleeve is sleeved with a mounting plate fixedly connected to the pull rod, and a plurality of pressure rods are fixed to the outside of the mounting plate. When welding centrifugal fan blades, the bracket is rotated to a vertical state, the assembled centrifugal fan impeller is sleeved on the conical table and the sleeve is mounted on the pull rod. The movement of the pull rod drives the sleeve, the mounting plate and the pressure rod to move and press the assembled centrifugal fan impeller. The bracket is rotated 90 degrees to make the axis of the impeller horizontal, and the two ends of the blade are ready for welding.

[0007] Preferably, four locking universal wheels are fixedly connected to the bottom of the movable seat, and the four locking universal wheels are distributed in a rectangular shape.

[0008] Preferably, it also includes a driving mechanism for driving the bracket to rotate, the driving mechanism includes a support plate and a support column fixed to the upper end of the movable seat, a rotating shaft with a rotatable connection is passed through the bracket, the rotating shaft passes through the support column and is rotatably connected thereto, a driving box is installed on the support plate, a first motor is installed on the driving box, the first motor is connected to the driving box, and the driving box is connected to the rotating shaft.

[0009] Preferably, a meshing worm wheel and worm are rotatably installed in the drive box, the output end of the first motor is fixedly connected to the worm, the other end of the worm is rotatably installed on the inner wall of the drive box, a fixedly connected transmission rod passes through the worm wheel, and the transmission rod is fixedly connected to the rotating shaft.

[0010] Preferably, a second motor is mounted on the bracket, a first gear is fixed to the output end of the second motor, a second gear fixedly connected to the cone-shaped platform is sleeved on the outside of the cone-shaped platform, and the first gear is meshed with the second gear.

[0011] Preferably, a mounting frame is fixed on the bracket, the rotating shaft is rotatably connected to the mounting frame, an electric push rod is installed on the mounting frame, and the output end of the electric push rod is fixedly connected to the pull rod.

[0012] Preferably, the sleeve is installed on the pull rod through a connecting mechanism, and the connecting mechanism includes a locking pin arranged through the sleeve, and a pull block is fixedly connected to the locking pin, and a spring is fixed on the pull block, and the other end of the spring is fixedly connected to the outer wall of the sleeve, and the spring is sleeved on the outside of the locking pin, and a pin groove is provided on the locking pin, and the locking pin is slidably connected in the pin groove.

[0013] Preferably, a through hole is penetrated through the sleeve, and the locking pin passes through the through hole and is slidably arranged therewith.

[0014] Preferably, the bracket is in the shape of an L-shaped plate, and a reinforcing rib is welded and fixed at a right angle of the bracket.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Pull the pull block by hand to drive the locking pin to move, put the sleeve on the outside of the pull rod, and then release the pull block. Under the action of the spring, the locking pin and the pull block are reset. The locking pin is against the outer wall of the pull rod, and the sleeve is moved until the locking pin is inserted into the pin groove. In this way, the sleeve can be fixed on the pull rod, and the sleeve can also be removed. The operation is simple and convenient.

[0017] 2. The electric push rod drives the pull rod to move, and the movement of the pull rod drives the sleeve, the mounting plate and multiple pressure rods to move. The pressure rods abut against and squeeze the front disk. Because of the cooperation with the conical table, the assembled centrifugal fan impeller can be corrected to make it coaxial with the conical table. In this way, the centrifugal fan impeller is locked to ensure the quality of subsequent welding.

[0018] 3. The first motor drives the worm to rotate, the worm drives the worm wheel and the transmission rod, the transmission rod drives the rotating shaft, and then drives the bracket to rotate. The rotation angle is 90°. Both ends of the centrifugal fan impeller that need to be welded are unobstructed. Laser welding can be used to weld the claws to the front and rear discs. In this way, both ends are welded at the same time, which improves the welding efficiency.

[0019] 4. During the welding process, the second motor drives the first gear to rotate, the first gear drives the second gear to rotate, the second gear drives the conical table to rotate, and the conical table drives the centrifugal fan impeller to rotate. In this way, another claw to be welded can be placed opposite to the laser head for welding. In this way, the centrifugal fan impeller can be welded, which improves the welding efficiency compared with the existing technology.

[0020] In summary, the present invention can not only clamp and position the assembled impeller to ensure the quality of the impeller welding, but also can rotate the impeller and weld the claws on both sides simultaneously, thereby improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a centrifugal fan laser welding fixture proposed by the present invention;

[0022] Figure 2 This is a state diagram of a centrifugal fan laser welding fixture proposed by the present invention when welding is required;

[0023] Figure 3 This is a structural schematic diagram of a connection mechanism in a centrifugal fan laser welding fixture proposed by the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of a worm gear in a laser welding fixture for a centrifugal fan proposed by the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of an impeller assembled in a laser welding fixture for a centrifugal fan proposed by the present invention;

[0026] Figure 6 This is a schematic structural diagram of the split impeller in a centrifugal fan laser welding fixing fixture proposed by the present invention.

[0027] In the figure: 1 moving seat, 2 universal wheel, 3 support plate, 4 drive box, 5 first motor, 6 support column, 7 rotating shaft, 8 bracket, 9 reinforcing rib, 10 mounting frame, 11 electric push rod, 12 pull rod, 13 centrifugal fan impeller, 14 sleeve, 15 mounting plate, 16 pressure rod, 17 conical table, 18 second gear, 19 first gear, 20 second motor, 21 pin groove, 22 through hole, 23 pull block, 24 lock pin, 25 spring, 26 worm, 27 worm wheel, 28 transmission rod, 29 front plate, 30 socket, 31 rear plate, 32 blade, 33 claw. DETAILED DESCRIPTION

[0028] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Reference Figure 1-Figure 6A centrifugal fan laser welding fixing fixture includes a moving seat 1. In order to facilitate the movement of the moving seat 1, four locking universal wheels 2 are fixedly connected to the bottom of the moving seat 1. The four locking universal wheels 2 are distributed in a rectangular shape. The flexibility of the moving seat 1 can be improved by locking the universal wheels 2. After moving to the desired position, the locking universal wheels 2 can be locked, so that the moving seat 1 can be stably supported.

[0032] The movable seat 1 is provided with a bracket 8 whose angle can be adjusted. The bracket 8 is in the shape of an L-shaped plate. A reinforcing rib 9 is welded and fixed at the right angle of the bracket 8 to increase the stability of the bracket 8; it also includes a driving mechanism for driving the bracket 8 to rotate, and the driving mechanism includes a support plate 3 and a support column 6 fixed to the upper end of the movable seat 1. A rotating shaft 7 that is rotatably connected is passed through the bracket 8. The rotating shaft 7 passes through the support column 6 and is rotatably connected thereto. A driving box 4 is installed on the support plate 3, and a first motor 5 is installed on the driving box 4. The first motor 5 is connected to the driving box 4, and the driving box 4 is connected to the rotating shaft 7. A meshing worm wheel 27 and a worm 26 are rotatably installed in the driving box 4, and the output end of the first motor 5 is fixedly connected to the worm 26, and the other end of the worm 26 is rotatably installed on the inner wall of the driving box 4. A fixedly connected transmission rod 28 is passed through the worm wheel 27, and the transmission rod 28 is fixedly connected to the rotating shaft 7.

[0033] A conical table 17 is rotatably mounted on the bracket 8. A second motor 20 is mounted on the bracket 8. A first gear 19 is fixed to the output end of the second motor 20. A second gear 18 is fixedly mounted on the outer portion of the conical table 17 and is meshed with the second gear 18.

[0034] A sliding pull rod 12 is provided through the conical platform 17 , a mounting frame 10 is fixed on the bracket 8 , the rotating shaft 7 is rotatably connected to the mounting frame 10 , an electric push rod 11 is installed on the mounting frame 10 , and the output end of the electric push rod 11 is fixedly connected to the pull rod 12 .

[0035] The outside of the pull rod 12 is sleeved with a sleeve 14 slidably connected thereto, and the sleeve 14 is installed on the pull rod 12 through a connecting mechanism, and the connecting mechanism includes a locking pin 24 arranged through the sleeve 14, and the sleeve 14 is penetrated by a through hole 22, and the locking pin 24 passes through the through hole 22 and is slidably arranged therewith; a pulling block 23 is fixedly connected to the locking pin 24, and a spring 25 is fixed on the pulling block 23, and the other end of the spring 25 is fixedly connected to the outer wall of the sleeve 14, and the spring 25 is sleeved on the outside of the locking pin 24, and a pin groove 21 is provided on the locking pin 24, and the locking pin 24 is slidably connected in the pin groove 21.

[0036] The outer part of the sleeve 14 is provided with a mounting plate 15 fixedly connected thereto, and a plurality of pressure rods 16 are fixed to the outer part of the mounting plate 15. When welding the centrifugal fan blades, the bracket 8 is rotated to a vertical state, the assembled centrifugal fan impeller 13 is sleeved on the conical platform 17 and the sleeve 14 is installed on the pull rod 12. The movement of the pull rod 12 drives the sleeve 14, the mounting plate 15 and the pressure rod 16 to move and press the assembled centrifugal fan impeller 13. The bracket 8 is rotated 90 degrees to make the axis of the impeller horizontal, and the two ends of the blade are ready for welding.

[0037] When the present invention is used, the device is as follows Figure 1 As shown, the rear disc 31 is placed on the conical platform 17 and pressed, then the claws 33 on the blades 32 are inserted into the insertion holes 30, and then the front disc 29 is installed on the claws 33 at the upper end, thus completing the assembly of the impeller.

[0038] Next, the staff pulls the pull block 23 by hand to move the locking pin 24, and puts the sleeve 14 on the outside of the pull rod 12, and then releases the pull block 23. Under the action of the spring 25, the locking pin 24 and the pull block 23 are reset, and the locking pin 24 is abutted against the outer wall of the pull rod 12. The sleeve 14 is moved until the locking pin 24 is inserted into the pin groove 21, so that the sleeve 14 can be fixed on the pull rod 12.

[0039] The electric push rod 11 is controlled to work, and the electric push rod 11 drives the pull rod 12 to move. The movement of the pull rod 12 drives the sleeve 14, the mounting plate 15 and multiple pressure rods 16 to move. The pressure rod 16 abuts against and squeezes the front disk 29. Due to the cooperation with the conical platform 17, the assembled centrifugal fan impeller 13 can be corrected to make it coaxial with the conical platform 17. In this way, the centrifugal fan impeller 13 is locked to ensure the quality of subsequent welding.

[0040] The first motor 5 drives the worm 26 to rotate, the worm 26 drives the worm wheel 27 and the transmission rod 28 to rotate, the transmission rod 28 drives the rotating shaft 7 to rotate, and then drives the bracket 8 to rotate, the rotation angle is 90°, and finally Figure 2 As shown, in this way, both ends of the centrifugal fan impeller 13 that need to be welded are not blocked, and the claws 33 can be welded together with the front plate 29 and the rear plate 31 by laser welding. In this way, both ends are welded at the same time, which improves the welding efficiency.

[0041] During the welding process, the second motor 20 drives the first gear 19 to rotate, the first gear 19 drives the second gear 18 to rotate, the second gear 18 drives the conical table 17 to rotate, and the conical table 17 drives the centrifugal fan impeller 13 to rotate, so that the other claw 33 to be welded can be placed opposite to the laser head for welding, so that the centrifugal fan impeller 13 can be welded, which improves the welding efficiency compared with the prior art.

[0042] After the welding is completed, the sleeve 14 is removed, and the welded centrifugal fan impeller 13 can be removed.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A centrifugal fan laser welding fixture, comprising a movable seat (1), characterized in that: The movable seat (1) is provided with a bracket (8) whose angle can be adjusted. A conical platform (17) is rotatably mounted on the bracket (8). A sliding pull rod (12) is passed through the conical platform (17). The outside of the pull rod (12) is sleeved with a sleeve (14) slidably connected to the pull rod. The outside of the sleeve (14) is sleeved with a mounting plate (15) fixedly connected to the pull rod. A plurality of pressure rods (16) are fixed to the outside of the mounting plate (15). When welding centrifugal fan blades, the bracket (8) is rotated to a vertical state, the assembled centrifugal fan impeller (13) is sleeved on the conical platform (17) and the sleeve (14) is mounted on the pull rod (12). The pull rod (12) moves to drive the sleeve (14), the mounting plate (15) and the pressure rod (16) to move and press the assembled centrifugal fan impeller (13). The bracket (8) is rotated (90) degrees to make the axis of the impeller horizontal, and the two ends of the blade are ready for welding.

2. The centrifugal fan laser welding fixture according to claim 1, characterized in that: Four locking universal wheels (2) are fixedly connected to the bottom of the movable seat (1), and the four locking universal wheels (2) are distributed in a rectangular shape.

3. The centrifugal fan laser welding fixture according to claim 1, characterized in that: The invention also comprises a driving mechanism for driving the bracket (8) to rotate, the driving mechanism comprising a supporting plate (3) and a supporting column (6) fixed to the upper end of the movable seat (1); a rotating shaft (7) for rotational connection is provided through the bracket (8); the rotating shaft (7) passes through the supporting column (6) and is rotationally connected thereto; a driving box (4) is installed on the supporting plate (3); a first motor (5) is installed on the driving box (4); the first motor (5) is connected to the driving box (4); and the driving box (4) is connected to the rotating shaft (7).

4. The centrifugal fan laser welding fixture according to claim 3, characterized in that: A worm wheel (27) and a worm (26) meshing with each other are rotatably mounted in the driving box (4); an output end of the first motor (5) is fixedly connected to the worm (26); the other end of the worm (26) is rotatably mounted on the inner wall of the driving box (4); a transmission rod (28) fixedly connected thereto passes through the worm wheel (27); and the transmission rod (28) is fixedly connected to the rotating shaft (7).

5. The centrifugal fan laser welding fixture according to claim 1, characterized in that: A second motor (20) is mounted on the bracket (8), a first gear (19) is fixed to the output end of the second motor (20), the outer portion of the conical platform (17) is sleeved with a second gear (18) fixedly connected thereto, and the first gear (19) is meshed with the second gear (18).

6. The centrifugal fan laser welding fixture according to claim 3, characterized in that: A mounting frame (10) is fixed on the bracket (8), the rotating shaft (7) is rotatably connected to the mounting frame (10), an electric push rod (11) is installed on the mounting frame (10), and the output end of the electric push rod (11) is fixedly connected to the pull rod (12).

7. The centrifugal fan laser welding fixture according to claim 1, characterized in that: The sleeve (14) is installed on the pull rod (12) through a connecting mechanism, and the connecting mechanism includes a locking pin (24) arranged to pass through the sleeve (14), and a pulling block (23) is fixedly connected to the locking pin (24), and a spring (25) is fixed to the pulling block (23), and the other end of the spring (25) is fixedly connected to the outer wall of the sleeve (14), and the spring (25) is sleeved on the outside of the locking pin (24), and a pin groove (21) is provided on the locking pin (24), and the locking pin (24) is slidably connected in the pin groove (21).

8. The centrifugal fan laser welding fixture according to claim 7, characterized in that: The sleeve (14) is provided with a through hole (22), and the locking pin (24) passes through the through hole (22) and is slidably arranged therewith.

9. The centrifugal fan laser welding fixture according to claim 1, characterized in that: The bracket (8) is in the shape of an L-shaped plate, and a reinforcing rib (9) is welded and fixed at a right angle of the bracket (8).

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