Auxiliary welding device and method for sealing ring of front disc of ventilator

Abstract

The invention belongs to the technical field of ventilator parts, and particularly discloses a ventilator front disc sealing ring welding auxiliary device and method.The ventilator front disc sealing ring welding auxiliary device comprises a base assembly, a front disc clamping assembly and a sealing ring clamping assembly, and the front disc clamping assembly comprises a supporting mechanism, a first rotating mechanism and a front disc positioning mechanism; the front disc positioning mechanism is used for clamping and positioning a front disc; the sealing ring clamping assembly comprises an XYZ-axis moving platform, a second rotating mechanism, a second automatic centering chuck and a plurality of sets of second clamping jaws. The XYZ-axis moving platform is used for moving the second automatic centering chuck; and the second rotating mechanism is used for rotating the second automatic centering chuck. The front disc and the sealing ring are accurately aligned, the impeller has higher efficiency, meanwhile, the welding operation mode of the front disc and the sealing ring is improved, the labor intensity of operators is relieved, the consistency of the welding efficiency and the welding seam quality is improved, and then high-quality and high-efficiency stable production of the front disc part of the ventilator is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of ventilator parts, and in particular relates to a welding auxiliary device and method for a sealing ring of a front disc of a ventilator. Background Art

[0002] The centrifugal fan is mainly composed of air inlet, casing, impeller, transmission mechanism and other parts. When working, the high-speed rotating impeller sucks the gas from the air inlet into the impeller and accelerates it. The gas changes its flow direction when it flows through the middle and rear discs of the impeller, and then the gas is discharged by centrifugal force. Among them, the length and gap of the sealing ring of the front disc of the impeller inserted into the air inlet play a decisive role in the performance of the fan. The front disc of the impeller is mainly welded by the front disc and the inlet sealing ring. The existing welding method of the front disc and the inlet sealing ring in the industry is mainly manual welding. The worker needs to lay the front disc flat on the ground, and then lift the inlet sealing ring onto the front disc for alignment and welding. During this process, due to the elastic aftereffect of the spinning of the front disc and the pressing of the mold and manual operation errors, alignment is difficult or positioning is inaccurate, which leads to poor concentricity between the front disc and the imported sealing ring after welding. In subsequent processing, problems such as inaccurate front disc profile or excessive gap at the sealing ring are prone to occur, making the efficiency of the fan substandard. At the same time, the workers need to squat to perform welding operations throughout the whole process, which has low welding efficiency, high labor intensity, and the weld quality cannot be guaranteed. Summary of the invention

[0003] The purpose of the present invention is to provide a welding auxiliary device and method for the front disc sealing ring of a ventilator, so as to solve the problem of misalignment between the front disc and the inlet sealing ring, thereby causing poor concentricity after welding the front disc and the inlet sealing ring. This scheme can greatly improve the alignment accuracy of the front disc and the inlet sealing ring.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a welding auxiliary device for the front disc sealing ring of a ventilator comprises a base assembly and a front disc clamping assembly and a sealing ring clamping assembly installed on the base assembly, the front disc clamping assembly comprises a supporting mechanism, a first rotating mechanism and a front disc positioning mechanism, the supporting mechanism is used to support the first rotating mechanism and the front disc positioning mechanism, the first rotating mechanism is used to rotate the front disc positioning mechanism, the front disc positioning mechanism is used to clamp and position the front disc, the front disc positioning mechanism comprises a first automatic centering chuck and a plurality of first The first clamping jaw is slidably connected to the first automatic centering chuck, and multiple groups of the first clamping jaws are used to clamp and position the front disk; the sealing ring clamping assembly includes an XYZ axis moving platform, a second rotating mechanism, a second automatic centering chuck and multiple groups of second clamping jaws, the second clamping jaws are slidably connected to the second automatic centering chuck, and multiple groups of the second clamping jaws are used to clamp and position the sealing ring; the XYZ axis moving platform is used to move the second automatic centering chuck and the second rotating mechanism; the second rotating mechanism is used to rotate the second automatic centering chuck.

[0005] Furthermore, the support mechanism includes a driving member and a first support plate, the driving member is used to drive the first support plate to rotate from a horizontal state to a vertical state; the first rotating mechanism is installed on the first support plate.

[0006] Furthermore, the driving member is a linear driver, the driving member is rotatably connected to the base assembly, the output end of the driving member is rotatably connected to the first support plate, and one side of the first support plate is rotatably connected to the base assembly.

[0007] Further, the XYZ-axis moving platform includes a second support plate, an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism, the X-axis moving mechanism is installed on the base assembly, the Z-axis moving mechanism is installed on the X-axis moving mechanism, the Y-axis moving mechanism is installed on the Z-axis moving mechanism, the second support plate is installed on the Y-axis moving mechanism, and the second automatic centering chuck and the second rotating mechanism are installed on the second support plate.

[0008] Furthermore, the first clamping claw comprises a supporting block and a hook block, the hook block is fixed on one side of the supporting block, and the inner side of the hook block is set as an inclined surface.

[0009] Furthermore, a seat is provided on one side of the base assembly.

[0010] A method for welding a front disc sealing ring of a ventilator, using the above-mentioned auxiliary device for welding a front disc sealing ring of a ventilator to perform welding, comprises the following steps:

[0011] Cutting: Cutting and cutting of sealing rings and front disc fan-shaped blocks;

[0012] Beveling processing: Beveling is performed on the joints between the sealing ring and the front disc fan-shaped block, and the welding between the front disc and the sealing ring;

[0013] Forming treatment: rolling and forming the front disc sector blocks;

[0014] Welding and forming: The front disc and the sealing ring are welded and formed separately;

[0015] Marking treatment: Draw the docking line on the sealing ring;

[0016] Front plate clamping: lay the first automatic centering chuck flat through the driving member, then hang the front plate onto the first automatic centering chuck, and use the first clamping claw to position and lock the front plate;

[0017] Sealing ring clamping: lift the sealing ring to the second automatic centering chuck, with the butt joint facing outwards, and use the second clamping claw to position and lock the sealing ring;

[0018] Alignment: Flip the first automatic centering chuck 90° through the driving member, and align the butt joint line of the front plate groove on the sealing ring through the XYZ axis moving platform;

[0019] Spot welding: spot weld the aligned front disc and sealing ring, and re-measure the distance between the groove of the front disc and the outer diameter of the sealing ring after spot welding;

[0020] Welding process: first weld the outer groove, then loosen the second jaw, and level the first automatic centering chuck through the driving part, and finally weld the inner groove.

[0021] Furthermore, after the welding forming step, a shape correction process will be carried out: the welded front disc is calibrated, and the small circle accuracy is <0.5mm.

[0022] Furthermore, after the welding process, a flaw detection process is also performed: the welded front disc sealing ring assembly is subjected to a radiographic flaw detection.

[0023] The beneficial effects of this technical solution are:

[0024] In view of the difficulty and low precision of manual welding between the front disc and the sealing ring, which leads to unqualified front disc profile and reduced fan performance, a special welding auxiliary device is used to achieve precise alignment of the front disc and the sealing ring. Compared with conventional manual welding, the welding auxiliary device and method provided by the present invention use XYZ three axes to achieve precise alignment of the front disc and the sealing ring, so that the impeller has higher efficiency. At the same time, it improves the welding operation mode of the front disc sealing ring, improves the labor intensity of the operators, and improves the welding efficiency and consistency of the weld quality, thereby realizing high-quality, high-efficiency and stable production of the front disc of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a welding auxiliary device for a front disc sealing ring of a ventilator according to the present invention;

[0026] Figure 2 for Figure 1 The structural diagram of the first automatic centering chuck in the industry;

[0027] Figure 3 for Figure 1 A schematic diagram of the structure of the first clamping claw;

[0028] Figure 4 The present invention is a flow chart for welding the sealing ring of the front disc of a ventilator. DETAILED DESCRIPTION

[0029] The following is further described in detail through specific implementation methods:

[0030] The figure marks in the drawings of the specification include: base assembly 1, driving member 2, first support plate 3, first automatic centering chuck 4, first claw 5, limit block 6, second automatic centering chuck 7, second claw 8, second rotating mechanism 9, second support plate 10, support seat 11, support frame 12, X-axis rotating motor 13, intermediate screw rod 14, sliding block 15, Z-axis moving mechanism 16, Y-axis moving mechanism 17, X-axis moving mechanism 18, support block 19, hook block 20, inclined surface 21, sliding groove 22.

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] Basically as attached Figure 1-3 As shown: A welding auxiliary device for the front disc seal ring of a ventilator, such as Figure 1As shown, it includes a base assembly 1 and a front plate clamping assembly and a sealing ring clamping assembly installed on both sides of the base assembly 1. A seat is provided on one side of the base assembly 1, so that the operator can perform welding operations while sitting. The front plate clamping assembly includes a support mechanism, a first rotating mechanism and a front plate positioning mechanism. The support mechanism is used to support the first rotating mechanism and the front plate positioning mechanism. The support mechanism includes a driving member 2 and a first support plate 3. The driving member 2 is used to drive the first support plate 3 to rotate from a horizontal state to a vertical state. Specifically, the driving member 2 adopts a linear drive, which can be a hydraulic cylinder. The cylinder body of the driving member 2 is rotatably connected to the base assembly 1, and the output end of the driving member 2 is rotatably connected to the first support plate 3. The lower side of the first support plate 3 is rotatably connected to the base assembly 1. A limit block 6 is provided on the support assembly. The limit block 6 is used to vertically limit the bottom of the first support plate 3. The limit block 6 and the driving member 2 are located on the same side of the first support plate 3.

[0034] The first rotating mechanism is installed on the first support plate 3, and the first rotating mechanism is used to rotate the first automatic centering chuck 4. The first rotating mechanism can be manually driven or electrically driven. When manually driven, the first rotating mechanism includes a mandrel, a bearing, a gasket and a locking nut. The first support plate 3 is provided with a first through hole, and the bearing is installed in the first through hole. The middle section of the mandrel can rotate in the bearing. One end of the mandrel is fixed to the first automatic centering chuck 4, and the other end is provided with a threaded section matching the locking nut. The locking nut is threadedly connected to the threaded section, and the gasket is located between the locking nut and the first support plate 3. Rotate the locking nut so that the locking nut and the gasket press the first support plate 3 tightly, thereby preventing the first automatic centering chuck 4 from rotating. When electric drive is adopted, the first rotating mechanism includes a driving motor, a mandrel and a bearing, a first through hole is provided on the first support plate 3, the bearing is installed in the first through hole, the middle section of the mandrel can rotate in the bearing, one end of the mandrel is fixed to the first automatic centering chuck 4, and the other end is connected to the driving end of the driving motor, and the housing of the driving motor is fixed to the first support plate 3. In this embodiment, the first rotating mechanism is manually driven.

[0035] The front disc positioning mechanism is used to clamp and position the front disc. The front disc positioning mechanism includes a first automatic centering chuck 4 and multiple groups of first claws 5 (three groups in this embodiment). Figure 2 As shown, the first automatic centering chuck 4 is provided with a sliding groove 22 corresponding to the first claws 5, and the first claws 5 are slidably connected to the first automatic centering chuck 4. Multiple groups of first claws 5 are used to clamp and position the front disc. Figure 3 As shown, the first clamping claw 5 includes a supporting block 19 and a hook block 20 . The hook block 20 is fixed to one side of the supporting block 19 (specifically, integrally formed), and the inner side of the hook block 20 is set as an inclined surface 21 .

[0036] The sealing ring clamping assembly includes an XYZ axis moving platform, a second rotating mechanism 9, a second automatic centering chuck 7 and multiple groups of second jaws 8 (specifically two groups). The second jaws 8 are slidably connected to the second automatic centering chuck 7, and the multiple groups of second jaws 8 are used to clamp and position the sealing ring.

[0037] The XYZ axis moving platform is used to move the second automatic centering chuck 7 and the second rotating mechanism 9; the XYZ axis moving platform includes a second support plate 10, an X axis moving mechanism 18, a Y axis moving mechanism 17 and a Z axis moving mechanism 16, the X axis moving mechanism 18 is mounted on the base assembly 1, the Z axis moving mechanism 16 is mounted on the X axis moving mechanism 18, the Y axis moving mechanism 17 is mounted on the Z axis moving mechanism 16, the second support plate 10 is mounted on the Y axis moving mechanism 17, and the second automatic centering chuck 7 and the second rotating mechanism 9 are mounted on the second support plate 10. Specifically, the X axis moving mechanism 18 includes a support seat 11, a support frame 12, an X axis rotating motor 13 and an intermediate screw rod 14, the support seat 11 and the support frame 12 are mounted on the base assembly 1, the X axis rotating motor 13 is fixed on the support frame 12, the output end of the X axis rotating motor 13 is connected to the intermediate screw rod 14, and the intermediate screw rod 14 is rotatably connected to the support seat 11 at a side away from the X axis rotating motor 13. The intermediate screw 14 is threadedly connected with a sliding block 15, and the base assembly 1 is provided with a slide groove, the length direction of the slide groove is consistent with the length direction of the intermediate screw 14, and the sliding block 15 is slidably connected in the slide groove. The Z-axis moving mechanism 16 and the Y-axis moving mechanism 17 are cross-shaped ball screws, the horizontal side of the cross-shaped ball screw is installed on the sliding block 15, and the vertical side of the cross-shaped ball screw is connected to the second support plate 10.

[0038] The second rotating mechanism 9 is used to rotate the second automatic centering chuck 7. The second rotating mechanism 9 can be manually driven or electrically driven. When manually driven, the second rotating mechanism 9 includes a mandrel, a bearing, a gasket and a locking nut. A second through hole is provided on the second support plate 10, and the bearing is installed in the second through hole. The middle section of the mandrel can rotate in the bearing. One end of the mandrel is fixed to the second automatic centering chuck 7, and the other end is provided with a threaded section matching the locking nut. The locking nut is threadedly connected to the threaded section, and the gasket is located between the locking nut and the second support plate 10. Rotate the locking nut so that the locking nut and the gasket press the second support plate 10 tightly, thereby preventing the second automatic centering chuck 7 from rotating. When electric drive is adopted, the second rotating mechanism 9 includes a driving motor, a mandrel and a bearing, a second through hole is provided on the second support plate 10, the bearing is installed in the second through hole, the middle section of the mandrel can rotate in the bearing, one end of the mandrel is fixed to the second automatic centering chuck 7, and the other end is connected to the driving end of the driving motor, and the housing of the driving motor is fixed to the second support plate 10. In this embodiment, the second rotating mechanism 9 adopts electric drive.

[0039] Embodiment 2

[0040] Basically as attached Figure 4 As shown, a method for welding a front disc sealing ring of a ventilator is provided, wherein the welding is performed using an auxiliary device for welding a front disc sealing ring of a ventilator in Embodiment 1, and the method comprises the following steps:

[0041] S01: Cutting: Use CNC cutting machine to cut the sealing ring and front disc fan-shaped block;

[0042] S02: Beveling process: Beveling process is performed on the joints of the sealing ring and the front disc fan-shaped block, and the welding places between the front disc and the sealing ring;

[0043] S03: Forming process: Use a CNC cone plate rolling machine to roll and shape the front disc sector block according to the rolling slope;

[0044] S04: Welding and forming: The front disc and the sealing ring are welded and formed separately;

[0045] S05: Profiling: Use a cone plate rolling machine to calibrate the front plate after welding, with a small circle accuracy of <0.5mm;

[0046] S06: Marking process: draw the docking line on the sealing ring;

[0047] S07: front disc clamping: the first automatic centering chuck 4 is laid flat by the driving member 2, and then the front disc is hoisted onto the first automatic centering chuck 4, and the front disc is positioned and locked by the first clamping claw 5;

[0048] S08: Clamping the sealing ring: lift the sealing ring to the second automatic centering chuck 7, with the butt joint facing outwards, and use the second clamping claw 8 to position and lock the sealing ring;

[0049] S09: Alignment processing: The first automatic centering chuck 4 is turned over 90 degrees by the driving member 2, and the butt joint line of the front plate groove on the sealing ring is aligned by the XYZ axis moving platform;

[0050] S10: Spot welding: spot weld the aligned front disc and the sealing ring, and after spot welding, re-measure the distance between the groove of the front disc and the outer diameter of the sealing ring with a caliper;

[0051] S11: Welding process: first perform welding of the weld at the outer groove, then release the second clamping jaw 8, and level the first automatic centering chuck 4 through the driving member 2, and finally perform welding of the weld at the inner groove;

[0052] S12: NDT processing: Perform radiographic inspection on the welded front disc sealing ring assembly.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A welding auxiliary device for a front disc sealing ring of a ventilator, characterized in that: The invention comprises a base assembly (1) and a front disc clamping assembly and a sealing ring clamping assembly mounted on the base assembly (1); the front disc clamping assembly comprises a supporting mechanism, a first rotating mechanism and a front disc positioning mechanism; the supporting mechanism is used to support the first rotating mechanism and the front disc positioning mechanism; the first rotating mechanism is used to rotate the front disc positioning mechanism; the front disc positioning mechanism is used to clamp and position the front disc; the front disc positioning mechanism comprises a first automatic centering chuck (4) and a plurality of first clamping claws (5); the first clamping claws (5) are slidably connected to the first automatic centering chuck (4); the plurality of first clamping claws (5) are slidably connected to the first automatic centering chuck (4); The first group of jaws (5) is used for clamping and positioning the front disk; the sealing ring clamping assembly includes an XYZ axis moving platform, a second rotating mechanism (9), a second automatic centering chuck (7) and multiple groups of second jaws (8), the second jaws (8) are slidably connected to the second automatic centering chuck (7), and the multiple groups of second jaws (8) are used for clamping and positioning the sealing ring; the XYZ axis moving platform is used for moving the second automatic centering chuck (7) and the second rotating mechanism (9); the second rotating mechanism (9) is used for rotating the second automatic centering chuck (7).

2. The auxiliary device for welding the front disc seal ring of a ventilator according to claim 1, characterized in that: The support mechanism comprises a driving member (2) and a first support plate (3); the driving member (2) is used to drive the first support plate (3) to rotate from a horizontal state to a vertical state; and the first rotating mechanism is mounted on the first support plate (3).

3. The auxiliary device for welding the front disc seal ring of a ventilator according to claim 2, characterized in that: The driving member (2) is a linear drive, the driving member (2) is rotatably connected to the base assembly (1), the output end of the driving member (2) is rotatably connected to the first support plate (3), and one side of the first support plate (3) is rotatably connected to the base assembly (1).

4. The auxiliary device for welding the front disc seal ring of a ventilator according to claim 1, characterized in that: The XYZ axis moving platform comprises a second support plate (10), an X axis moving mechanism (18), a Y axis moving mechanism (17) and a Z axis moving mechanism (16); the X axis moving mechanism (18) is mounted on the base assembly (1); the Z axis moving mechanism (16) is mounted on the X axis moving mechanism (18); the Y axis moving mechanism (17) is mounted on the Z axis moving mechanism (16); the second support plate (10) is mounted on the Y axis moving mechanism (17); and the second automatic centering chuck (7) and the second rotating mechanism (9) are mounted on the second support plate (10).

5. The auxiliary device for welding the front disc seal ring of a ventilator according to claim 1, characterized in that: The first clamping claw (5) comprises a supporting block (19) and a hook block (20); the hook block (20) is fixed on one side of the supporting block (19); and the inner side of the hook block (20) is set as an inclined surface (21).

6. The auxiliary device for welding the front disc seal ring of a ventilator according to claim 1, characterized in that: A seat is provided on one side of the base assembly (1).

7. A method for welding a front disc sealing ring of a ventilator, using the auxiliary device for welding a front disc sealing ring of a ventilator as claimed in claim 2, characterized in that: The following steps are involved: Cutting: Cutting and cutting of sealing rings and front disc fan-shaped blocks; Beveling processing: Beveling is performed on the joints between the sealing ring and the front disc fan-shaped block, and the welding between the front disc and the sealing ring; Forming treatment: rolling and forming the front disc sector blocks; Welding and forming: The front disc and the sealing ring are welded and formed separately; Marking treatment: Draw the docking line on the sealing ring; Front disc clamping: the first automatic centering chuck (4) is laid flat by the driving member (2), and then the front disc is hoisted onto the first automatic centering chuck (4), and the front disc is positioned and locked by the first clamping claw (5); Clamping the sealing ring: hoist the sealing ring to the second automatic centering chuck (7), with the butt joint facing outwards, and use the second clamping claw (8) to position and lock the sealing ring; Alignment processing: the first automatic centering chuck (4) is turned over 90 degrees by the driving member (2), and the butt joint line of the front plate groove on the sealing ring is aligned by the XYZ axis moving platform; Spot welding: spot weld the aligned front disc and sealing ring, and re-measure the distance between the groove of the front disc and the outer diameter of the sealing ring after spot welding; Welding process: firstly weld the weld seam at the outer groove, then loosen the second clamping claw (8), and level the first automatic centering chuck (4) through the driving member (2), and finally weld the weld seam at the inner groove.

8. A method for welding a sealing ring of a front disc of a ventilator according to claim 7, characterized in that: After the welding forming step, a calibration process will be carried out: the welded front disc will be calibrated, and the small circle accuracy is <0.5mm.

9. A method for welding a sealing ring of a front disc of a ventilator according to claim 8, characterized in that: After the welding process, nondestructive testing will be carried out: the welded front disc sealing ring assembly will be subjected to radiographic testing.

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