A positioning fixture for welding an air intake casing and a method of using the same

Abstract

The application discloses a positioning clamp for welding of an air inlet machine case and a use method thereof. The clamp comprises a fixed bottom plate, a top end of which is fixedly connected with an inner ring of a bearing; a welding station conversion turntable, a bottom end surface of the welding station conversion turntable is fixedly connected with an outer ring of the bearing, and a locking piece for locking with the fixed bottom plate is fixed on an outer wall of the outer ring; a case positioning tool, which is installed on a top end surface of the welding station conversion turntable and is used for clamping and positioning the air inlet machine case placed on the welding station conversion turntable; a plurality of welding point positions are arranged between a plurality of case supporting plates on the air inlet machine case and an inner side wall of a case outer ring, the welding station conversion turntable is rotated, different welding point positions are converted to the welding station, and continuous welding of the plurality of welding point positions of the air inlet machine case is realized. The positioning clamp realizes one-time clamping and multi-station continuous welding through rotation and locking, eliminates repeated positioning errors, and greatly improves welding efficiency and position consistency.

Description

Technical Field

[0001] This invention relates to the field of fixture technology for welding aerospace components, and more specifically to a positioning fixture for welding an air intake casing and its method of use. Background Technology

[0002] The air intake casing of an aero-engine is a crucial structural component that serves as the engine's load-bearing and airflow passageway. It typically consists of an outer casing ring, an inner casing ring, and multiple casing support plates. Its large size, complex spatial shape, and high assembly precision requirements make it a critical component in aero-engine manufacturing. During the manufacturing process, the casing support plates and the outer casing ring are usually connected by welding. The welding quality directly affects the overall rigidity, assembly accuracy, and service reliability of the casing. Because the air intake casing is a thin-walled, complex annular component, it is susceptible to heat input, clamping constraints, and uneven structural rigidity during welding, leading to problems such as welding deformation, localized misalignment, and residual stress concentration. Therefore, specialized positioning fixtures are required during the welding process to reliably support, clamp, and position the entire casing component.

[0003] Existing intake casing welding fixtures mostly employ fixed supports or rigid clamping structures, typically only suitable for positioning specific casing sizes, resulting in poor adaptability. When casing dimensions (such as changes in the height or thickness of the outer ring), support plate positions, or welding areas change, the fixture often needs to be readjusted or replaced, increasing manufacturing costs and clamping time. Furthermore, for intake casings with multiple support plates and weld seams, the welding positions are usually distributed circumferentially. If the fixture lacks rotation and locking functions, frequent adjustments to the welding torch position or re-clamping of the workpiece are required before welding, leading to low operational efficiency and easily introducing repeatability errors.

[0004] In related technologies, existing technologies CN120002278B and CN118989690A both disclose a welding fixture for thin-walled air intake casings and its usage method, which can, to a certain extent, achieve positioning and clamping of individual welded parts and improve the positional accuracy during the welding process. Existing technology CN223642974U discloses a welding fixture for aviation intermediate casings, which can be used for welding positioning of casing-type components. However, the above-mentioned fixtures are still mainly geared towards specific structures or single clamping requirements, and still cannot adapt to casing dimensions, such as welding multiple models of casings with varying outer ring heights and thicknesses. Summary of the Invention

[0005] In view of this, the present invention provides a positioning fixture for welding intake casing and its usage method, which can be adapted to the welding positioning of intake casings of various specifications and can realize continuous welding of multiple welding points of intake casing, so as to reduce repeated clamping and secondary alignment, and improve welding efficiency and positioning consistency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A positioning fixture for welding an intake casing includes: A fixed base plate is provided, the top of which is fixedly connected to the inner ring of the bearing. A welding station conversion turntable, the bottom end face of which is fixedly connected to the outer ring of the bearing, and a locking element for locking with the fixed base plate is fixed on the outer wall of the outer ring; A casing positioning fixture is installed on the top surface of the welding station conversion turntable and is used to clamp and position the intake casing placed on the welding station conversion turntable. There are multiple welding points between the multiple casing support plates on the intake casing and the inner side wall of the outer ring of the casing. By rotating the welding station conversion turntable, different welding points can be switched to the welding station to achieve continuous welding of multiple welding points of the intake casing.

[0008] Furthermore, the locking elements are a plurality of those arranged circumferentially along the outer ring.

[0009] Furthermore, the locking element includes: A locking rod, the top of which is fixed to the outer side wall of the outer ring; A tightening screw is screwed to the bottom of the locking rod, and the tail end of the tightening screw is in tight contact with the top surface of the fixed base plate.

[0010] Furthermore, the casing positioning fixture includes: A height-adjustable support assembly is provided, with its bottom end mounted on the top surface of the welding station turntable. The outer ring of the casing is placed on the top surface of the height-adjustable support assembly. Multiple vertical clamping clamps are evenly distributed and fixed on the top surface of the height-adjustable support assembly at positions on the outer periphery of the outer ring of the casing. The multiple vertical clamping clamps are pressed and fixed to the outer flange at the bottom end of the outer ring of the casing. The outer ring of the casing has multiple inner clamping components installed on the top surface of the welding station turntable. These multiple inner clamping components are arranged circumferentially on the inner side of the outer ring of the casing, and they are in radial clamping contact with the inner wall of the outer ring of the casing. The inner ring clamping assembly is installed on the top surface of the welding station turntable and located inside the multiple outer ring clamping assemblies. It is used to clamp and position the inner ring placed inside the outer ring. The inner ring is composed of multiple inner ring units spliced ​​together around the circumference. The outer wall of each inner ring unit is fixedly connected to the casing support plate. The tail end of the casing support plate away from the inner ring unit is welded to the inner wall of the outer ring to form the welding point. The outer ring clamping assemblies are respectively provided on both sides of each casing support plate. The outer ring clamping assemblies are used to prevent the outer ring from undergoing welding deformation.

[0011] Furthermore, the height-adjustable support assembly includes: The lifting drive component consists of multiple components fixed to the top surface of the welding station conversion turntable and arranged in a ring. The outer ring support plate of the casing is fixed at its bottom end to the lifting end of the plurality of lifting drive components. The vertical clamping clamp is fixed at the top surface of the outer ring support plate of the casing, and the outer ring of the casing is placed on the top surface of the outer ring support plate of the casing.

[0012] Furthermore, each of the aforementioned casing outer ring inner clamping assemblies includes: A spring mounting plate, the bottom end of which is fixed to the top surface of the welding station turntable, and a spring guide cylinder is fixed on the side of the spring mounting plate facing the outer ring of the casing; A clamping spring, one end of which extends into the spring guide cylinder and is fixedly connected to one side of the spring mounting plate; A radial clamping block is fixedly connected to the other end of the clamping spring, and the radial clamping block is in radial clamping contact with the inner sidewall of the outer ring of the casing.

[0013] Furthermore, the inner ring clamping assembly of the casing includes: Inner ring motor mounting plate, the inner ring motor mounting plate is fixed on the top surface of the welding station conversion turntable; An inner ring telescopic motor, wherein the inner ring telescopic motor is fixed on the inner ring motor mounting plate; An inner ring clamping shaft passes through the inner ring of the casing, and a lower support plate for supporting the bottom end face of the inner ring of the casing is fixed at the lower end of the inner ring clamping shaft. A locking nut is screwed onto the upper part of the inner ring clamping shaft. An upper pressure plate is attached to the top surface of the inner ring of the casing. The upper pressure plate is sleeved on the inner ring pressure shaft and located below the locking nut. Tightening the locking nut clamps and positions the inner ring of the casing between the upper pressure plate and the lower support plate.

[0014] Furthermore, the casing positioning fixture also includes a casing support assembly for supporting the bottom end face of each casing support plate to prevent welding deformation of the casing support plate.

[0015] Furthermore, the casing support plate assembly includes: Mounting ring plate, the bottom end of which is fixed to the top surface of the welding station conversion turntable; The support plate telescopic motor consists of multiple motors fixed to the outer wall of the mounting ring plate and arranged in a ring shape. The support plate has multiple support blocks, the bottom ends of which are fixedly connected to the telescopic ends of the multiple support plate telescopic motors, and the top ends of which abut against the bottom surfaces of the multiple casing support plates.

[0016] This invention provides a method for using the positioning fixture for welding the intake casing, comprising the following steps: S1: Place the intake casing on the welding station turntable; S2: The intake casing is clamped and positioned by the casing positioning fixture, and one of the welding points is placed at the welding station. The welding station conversion turntable is locked and fixed by the locking component to keep the intake casing in a stable state. S3: Use a welding device to weld the welding point; S4: After the welding at this point is completed, unlock the locking parts, rotate the welding station conversion turntable to move the next welding point to the welding station, and relock the locking parts to fix the position of the welding station conversion turntable. Then, welding is performed by the welding device. S5: Repeat step S4 to complete the welding of all welding points on the intake casing.

[0017] Furthermore, the specific process of step S2 is as follows: S2.1: The lifting drive adjusts the height of the outer ring support plate of the casing so that the outer ring of the casing is at the predetermined welding height position; S2.2: Vertically clamp and position the outer ring of the casing using vertical clamping clamps; S2.3: Then the clamping spring radially clamps and positions the inner wall of the outer ring of the casing through the radial clamping block, and provides radial floating clamping force through the clamping spring; S2.4: The lower support plate is lifted by the inner ring telescopic motor so that the lower support plate abuts against and supports the bottom end face of the inner ring of the casing. Then, the locking nut is rotated to clamp and position the inner ring of the casing between the upper pressure plate and the lower support plate, thus completing the axial pressing and locking of the inner ring of the casing. S2.5: The support plate support block is driven to move upward by the support plate telescopic motor, so that the support plate support block abuts against and supports the casing support plate, thereby limiting the deformation of the casing support plate during the welding process; S2.6: Tighten the locking screws so that the tail end of the locking screws is in tight contact with the top surface of the fixed base plate, so that the intake casing as a whole remains stable.

[0018] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a positioning fixture and a method for welding an intake casing, which has the following advantages: (1) By setting up rotation and locking components, the circumferential rotation and locking positioning of the entire intake casing can be realized, so that multiple welding points can be quickly adjusted to the welding position, reducing repeated clamping and secondary alignment, and improving welding efficiency and positioning consistency. It also enables continuous positioning welding of multiple welding areas of the entire intake casing.

[0019] (2) By setting up height-adjustable support components and radial floating clamping structure, it can be adapted to different models of intake casings, such as welding positioning with different heights and thicknesses of the outer ring of the casing, thus realizing the universality of the welding fixture of the present invention.

[0020] (3) By cooperating with the vertical clamping clamp, the inner clamping assembly of the outer ring of the casing, and the inner ring clamping assembly of the casing, multi-directional coordinated positioning of the outer ring and inner ring of the casing can be achieved, thereby improving the clamping rigidity and welding positioning accuracy.

[0021] (4) By setting the casing support plate support assembly, the casing support plate can be locally supported and positioned, limiting its warping or displacement under the action of welding heat input, thereby improving the stability of the welding process and the quality of weld formation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a front view structural schematic diagram of a positioning fixture for welding an air intake casing provided by the present invention.

[0024] Figure 2 for Figure 1A top-view structural diagram.

[0025] Figure 3 for Figure 1 A longitudinal cross-sectional schematic diagram.

[0026] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure behind the outer ring of the hidden casing.

[0027] Figure 5 for Figure 4 A magnified schematic diagram of the structure of part A in the middle.

[0028] Figure 6 This is a schematic diagram of the intake casing.

[0029] Figure 7 This is a schematic diagram of the inner ring clamping shaft. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] This invention discloses a positioning fixture for welding an intake casing, see details below. Figures 1-7 As shown, the positioning fixture includes: Fixed base plate 1, the top of fixed base plate 1 is fixedly connected to the inner ring of bearing 2; The bottom end face of the welding station conversion turntable 3 is fixedly connected to the outer ring 21 of the bearing 2, and a locking part 4 for locking with the fixed base plate 1 is fixed on the outer wall of the outer ring 21. The casing positioning fixture 5 is installed on the top surface of the welding station conversion turntable 3 and is used to clamp and position the intake casing 100 placed on the welding station conversion turntable 3. There are multiple welding points 200 between the multiple casing support plates 1001 on the intake casing 100 and the inner side wall of the outer ring 1002 of the casing. By rotating the welding station conversion turntable 3, different welding points 200 can be switched to the welding station to achieve continuous welding of multiple welding points 200 on the intake casing 100.

[0035] In this embodiment, the positioning fixture of the present invention achieves continuous welding at multiple stations with a single clamping by rotation and locking, eliminating repeated positioning errors and greatly improving welding efficiency and positional consistency.

[0036] In some embodiments, the locking member 4 includes: Locking rod 41, the top of which is fixed to the outer side wall of outer ring 21; Tightening screw 42 is screwed to the bottom of locking rod 41, and the tail end of the screw 42 is in tight contact with the top surface of the fixed base plate 1.

[0037] The effects of the above solution: Reliable locking and easy operation: It adopts a mechanical threaded clamping method, which has a simple structure and can provide stable and sufficient frictional torque, effectively preventing the turntable from rotating unexpectedly during the welding process.

[0038] Continuously adjustable locking position: Unlike pin-hole positioning (which can only be locked in a fixed hole position), the screw tightening method can lock at any angle of the turntable rotation, which can adapt to welding points with non-uniform angle distribution and has extremely high flexibility.

[0039] This invention provides a specific embodiment of the housing positioning fixture 5, which includes: The height-adjustable support assembly 51 is mounted on the top surface of the welding station conversion turntable 3. The outer ring 1002 of the casing is placed on the top surface of the height-adjustable support assembly 51. Multiple vertical clamping clamps 52 are evenly distributed and fixed on the top surface of the height-adjustable support assembly 51 at the position on the outer periphery of the outer ring 1002 of the casing. The multiple vertical clamping clamps 52 are pressed and fixed to the outer flange 10021 at the bottom of the outer ring 1002 of the casing. The outer ring of the casing has multiple inner clamping components 53, which are installed on the top surface of the welding station turntable 3. The multiple inner clamping components 53 are arranged circumferentially on the inner side of the outer ring 1002 of the casing, and the multiple inner clamping components 53 are radially clamped to the inner wall of the outer ring 1002 of the casing. The inner ring clamping assembly 54 is installed on the top surface of the welding station turntable 3 and is located inside the multiple outer ring clamping assemblies 53. It is used to clamp and position the inner ring 1003 placed inside the outer ring 1002. The inner ring 1003 is composed of multiple inner ring units 10031 spliced ​​around the circumference. Each inner ring unit 10031 has a casing support plate 1001 fixedly connected to its outer wall. The tail end of the casing support plate 1001 away from the inner ring unit 10031 is welded to the inner wall of the outer ring 1002 to form a welding point 200. Each casing support plate 1001 has an outer ring clamping assembly 53 on both sides. The outer ring clamping assembly 53 is used to prevent the outer ring 1002 from being deformed during welding.

[0040] The effects of the above solution: Multi-point coordination and all-round constraint: Through the combination of support (Z-direction load bearing), compression (Z-direction anti-warping), inner side tightening (radial anti-shrinkage), and inner ring clamping (axial positioning), a rigid-flexible coupling constraint system with over-positioning is formed for the thin-walled casing, which suppresses welding deformation to the greatest extent.

[0041] Active anti-deformation design: The inner side clamping components of the outer ring are clearly arranged on both sides of each support plate, which realizes precise local radial support for the outer ring area near each weld. It directly targets the heat-affected zone of the weld to resist deformation and damping, and the effect is significantly better than the overall support.

[0042] The height-adjustable support assembly 51 includes: The lifting drive component 511 (which can be an electric push rod or a pneumatic push rod) consists of multiple lifting drive components 511 that are fixed on the top surface of the welding station conversion turntable 3 and arranged in a ring. The outer ring support plate 512 of the casing is fixed at its bottom end to the lifting end of multiple lifting drive components 511. The vertical clamping clamp 52 is fixed on the top surface of the outer ring support plate 512 of the casing, and the outer ring 1002 of the casing is placed on the top surface of the outer ring support plate 512 of the casing.

[0043] The above solution achieves the following effects: multiple lifting drive components enable the height of the outer ring support plate of the casing to be adjustable, and the lifting stroke can adapt to casing models with different height dimensions, realizing a mode where one tooling can be used for multiple product models, greatly improving the versatility of welding fixtures.

[0044] Each casing outer ring inner clamping assembly 53 includes: Spring mounting plate 531, the bottom end of spring mounting plate 531 is fixed on the top surface of welding station conversion turntable 3, and spring guide cylinder 532 is fixed on the side of spring mounting plate 531 facing the outer ring 1002 of the casing. A clamping spring 533 is provided, with one end of the clamping spring 533 extending into the spring guide cylinder 532 and being fixedly connected to one side of the spring mounting plate 531. Radial clamping block 534 is fixedly connected to the other end of clamping spring 533, and radial clamping block 534 is radially clamped to the inner side wall of outer ring 1002 of casing.

[0045] The technical effects of the above solution: Provides flexible, adaptive radial damping force: The non-rigid nature of the clamping spring allows it to provide continuous clamping force while allowing the outer ring to make slight outward displacement during welding thermal expansion, thus avoiding thermal stress cracks caused by rigid clamping.

[0046] Dynamic thermal shrinkage compensation: When welding is completed and the temperature drops, the outer ring shrinks radially. The spring can push the clamping block to automatically follow, always maintaining close contact and continuously providing anti-shrinkage resistance, effectively maintaining the roundness of the outer ring.

[0047] The guide cylinder ensures the stability of the spring: the guide cylinder constrains the radial runout of the spring, ensuring that the clamping force always acts in the precise radial direction and avoids the generation of tangential force.

[0048] Radial clamping for casing rings of different thicknesses: The radial clamping block can automatically match the inner clamping requirements of casing outer rings of different thicknesses as the clamping spring floats, achieving universality for different product specifications. There is no need to process positioning fixtures of different sizes according to different models of intake casings, reducing welding costs.

[0049] The casing inner ring clamping assembly 54 includes: Inner ring motor mounting plate 541, the inner ring motor mounting plate 541 is fixed on the top surface of the welding station conversion turntable 3; Inner ring telescopic motor 542, the inner ring telescopic motor 542 is fixed on inner ring motor mounting plate 541; The inner ring clamping shaft 543 passes through the inner ring 1003 of the casing, and the lower end of the inner ring clamping shaft 543 is fixed with a lower support plate 5431 for supporting the bottom end face of the inner ring 1003 of the casing. The upper part of the inner ring clamping shaft 543 is screwed with a locking nut 544. The inner ring upper clamping plate 545 is pressed against the top surface of the inner ring 1003 of the casing, and the inner ring upper clamping plate 545 is sleeved on the inner ring clamping shaft 543 and located below the locking nut 544. Tightening the locking nut 544 will clamp and position the inner ring 1003 of the casing between the inner ring upper clamping plate 545 and the lower support plate 5431.

[0050] The technical effects of the above solution: Provides independent and strong axial constraint for the inner ring: firmly clamps the inner ring of the casing between the upper pressure plate and the lower support plate, completely restricting the axial movement and runout of the inner ring of the casing during the welding process, and ensuring the relative positional accuracy of the inner ring and the outer ring in the height direction.

[0051] Adapting to Inner Ring Assembly Errors: The large flat structure of the upper clamping plate and lower support plate can adapt to minor unevenness that may exist on the upper and lower surfaces of the inner ring, achieving uniform surface contact and clamping, and avoiding local crushing.

[0052] In some embodiments, the casing positioning fixture 5 further includes a casing support plate assembly 55 for supporting the bottom end face of each casing support plate 1001 to prevent welding deformation of the casing support plate 1001.

[0053] The technical effects of the above solution: Solving the "sag" problem of the cantilever support plate: The casing support plate is a typical cantilever structure, which is prone to bending downwards under its own weight and welding thermal stress. The bottom support provides a rigid process fulcrum, ensuring that the end of the support plate is precisely aligned with the weld seam of the inner sidewall of the outer ring before welding, preventing the "misalignment" defect.

[0054] Suppressing out-of-plane deformation of the support plate: Welding heat input can cause the support plate to have a complex warping tendency, and the bottom support constrains the Z-direction displacement, which significantly improves the shape stability of the support plate.

[0055] Specifically, the casing support plate assembly 55 includes: Mounting ring plate 551, the bottom end of mounting ring plate 551 is fixed to the top surface of welding station conversion turntable 3; The support plate telescopic motor 552 consists of multiple motors fixed on the outer wall of the mounting ring plate 551 and arranged in a ring shape. Support plate support block 553, there are multiple support plate support blocks 553, the bottom ends of multiple support plate support blocks 553 are fixedly connected to the telescopic ends of multiple support plate telescopic motors 552 respectively, and the top ends of multiple support plate support blocks 553 respectively abut against the bottom end surfaces of multiple casing support plates 1001.

[0056] The technical effects of the above solution: Achieving independent and precise support for each support plate: Since there may be height tolerances in each support plate after manufacturing and assembly, the independently driven support blocks can be adjusted to just contact the bottom of their respective support plates to achieve "zero gap" support and avoid some support plates being suspended or overloaded due to inconsistent support heights.

[0057] Controllable and stable support force: The motor drive can provide a stable lifting force, which is maintained continuously during the welding process, effectively counteracting the tendency of the support plate to collapse caused by welding stress.

[0058] Highly adaptable: The ring-shaped arrangement has a compact structure and adjustable extension stroke, which can adapt to different casing models with varying support plate heights.

[0059] Of course, in another embodiment, the present invention may also add an elastic clamping hook or upper pressure block to the casing support plate assembly to form a clamping grip with the bottom support plate support block, thereby limiting the warping of the support plate from both the top and bottom directions.

[0060] A method for using a positioning fixture for welding an intake casing includes the following steps: S1: Place the intake casing 100 on the welding station turntable 3; S2: The intake casing 100 is clamped and positioned by the casing positioning fixture 5, and one of the welding points 200 is placed at the welding station. The welding station conversion turntable 3 is locked and fixed by the locking part 4, so that the intake casing 100 is kept in a stable state. S3: Use a welding device to weld the welding point 200; S4: After the welding point 200 is completed, unlock the locking part 4, rotate the welding station conversion turntable 3 to make the next welding point 200 rotate to the welding station, and relock the locking part 4 to fix the position of the welding station conversion turntable 3, and then perform welding through the welding device. S5: Repeat step S4 to complete the welding of all welding points 200 on the intake casing 100.

[0061] 10. A method of using a positioning fixture for welding an intake casing according to claim 9, characterized in that the specific process of step S2 is as follows: S2.1: The lifting drive component 511 adjusts the height of the outer ring support plate 512 of the casing so that the outer ring 1002 of the casing is at the predetermined welding height position; S2.2: Vertical clamping clamp 52 is used to vertically clamp and position the outer ring 1002 of the casing; S2.3: Then the clamping spring 533 radially clamps and positions the inner wall of the outer ring 1002 of the casing through the radial clamping block 534, and provides radial floating clamping force through the clamping spring 533; S2.4: The lower support plate 5431 is lifted by the inner ring telescopic motor 542, so that the lower support plate 5431 abuts against and supports the bottom end face of the inner ring 1003 of the casing. Then, the locking nut 544 is rotated to clamp and position the inner ring 1003 of the casing between the upper pressure plate 545 of the inner ring and the lower support plate 5431, thus completing the axial pressing and locking of the inner ring 1003 of the casing. S2.5: The support plate support block 553 is driven to move upward by the support plate telescopic motor 552, so that the support plate support block 553 abuts against and supports the casing support plate 1001, thereby limiting the deformation of the casing support plate 1001 during the welding process. S2.6: Tighten the top screw 42 so that the end of the screw 42 is in tight contact with the top surface of the fixed base plate 1, so that the intake casing as a whole remains stable.

[0062] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0063] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A positioning fixture for welding an intake casing, characterized in that, include: A fixed base plate (1) is fixedly connected to the inner ring of the bearing (2) at its top end; The bottom end face of the welding station conversion turntable (3) is fixedly connected to the outer ring (21) of the bearing (2), and a locking member (4) for locking with the fixed base plate (1) is fixed on the outer wall of the outer ring (21). The casing positioning fixture (5) is installed on the top surface of the welding station conversion turntable (3) and is used to clamp and position the intake casing (100) placed on the welding station conversion turntable (3). There are multiple welding points (200) between the multiple casing support plates (1001) on the intake casing (100) and the inner side wall of the outer ring (1002) of the casing. By rotating the welding station conversion turntable (3), different welding points (200) can be converted to the welding station to achieve continuous welding of multiple welding points (200) of the intake casing (100).

2. The positioning fixture for welding an intake casing according to claim 1, characterized in that, The locking element (4) includes: Locking rod (41), the top of which is fixed to the outer side wall of the outer ring (21); A tightening screw (42) is screwed to the bottom of the locking rod (41), and the tail end of the screw (42) is in tight contact with the top surface of the fixed base plate (1).

3. The positioning fixture for welding an intake casing according to claim 1, characterized in that, The casing positioning fixture (5) includes: A height-adjustable support assembly (51) is installed at its bottom end on the top surface of the welding station conversion turntable (3). The outer ring of the casing (1002) is placed on the top surface of the height-adjustable support assembly (51). Multiple vertical clamping clamps (52) are evenly distributed and fixed on the top surface of the height-adjustable support assembly (51) at a position on the outer periphery of the outer ring of the casing (1002). The multiple vertical clamping clamps (52) are pressed and fixed to the outer flange (10021) at the bottom end of the outer ring of the casing (1002). The outer ring of the casing has an inner clamping assembly (53). The outer ring of the casing has an inner clamping assembly (53) which is a plurality of components installed on the top surface of the welding station turntable (3). The plurality of outer ring of the casing has an inner clamping assembly (53) arranged in a circumferential manner on the inner side of the outer ring of the casing (1002). The plurality of outer ring of the casing has an inner clamping contact with the inner sidewall of the outer ring of the casing (1002). The casing inner ring clamping assembly (54) is installed on the top surface of the welding station conversion turntable (3) and located inside the multiple casing outer ring inner clamping assemblies (53). It is used to clamp and position the casing inner ring (1003) placed inside the casing outer ring (1002). The casing inner ring (1003) is composed of multiple inner ring units (10031) spliced ​​around its circumference. Each inner ring unit (10031) has a... The casing support plate (1001) is fixedly connected. The tail end of the casing support plate (1001) away from the inner ring unit (10031) is welded to the inner sidewall of the outer ring (1002) of the casing to form the welding point (200). Each casing support plate (1001) is provided with a casing outer ring inner tightening component (53) on both sides. The casing outer ring inner tightening component (53) is provided to prevent the outer ring (1002) of the casing from undergoing welding deformation.

4. A positioning fixture for welding an intake casing according to claim 3, characterized in that, The height-adjustable support assembly (51) includes: The lifting drive component (511) is a plurality of components fixed on the top surface of the welding station conversion turntable (3) and arranged in a ring. The outer ring support plate (512) of the casing is fixed at its bottom end to the lifting end of the plurality of lifting drive components (511), the vertical clamping clamp (52) is fixed at the top surface of the outer ring support plate (512), and the outer ring (1002) of the casing is placed on the top surface of the outer ring support plate (512).

5. A positioning fixture for welding an intake casing according to claim 3, characterized in that, Each of the aforementioned casing outer ring inner clamping assemblies (53) includes: A spring mounting plate (531) is fixed at its bottom end to the top surface of the welding station conversion turntable (3), and a spring guide cylinder (532) is fixed on the side of the spring mounting plate (531) facing the outer ring (1002) of the casing. A clamping spring (533) is provided, one end of which extends into the spring guide cylinder (532) and is fixedly connected to one side of the spring mounting plate (531). A radial clamping block (534) is fixedly connected to the other end of the clamping spring (533), and the radial clamping block (534) is in radial clamping contact with the inner sidewall of the outer ring (1002) of the casing.

6. A positioning fixture for welding an intake casing according to claim 3, characterized in that, The casing inner ring clamping assembly (54) includes: Inner ring motor mounting plate (541), the inner ring motor mounting plate (541) is fixed on the top surface of the welding station conversion turntable (3); An inner ring telescopic motor (542) is fixed on the inner ring motor mounting plate (541); An inner ring clamping shaft (543) passes through the inner ring (1003) of the casing, and a lower support plate (5431) for supporting the bottom surface of the inner ring (1003) of the casing is fixed at the lower end of the inner ring clamping shaft (543). A locking nut (544) is screwed onto the upper part of the inner ring clamping shaft (543). An upper inner ring clamping plate (545) is pressed against the top surface of the inner ring (1003) of the casing. The upper inner ring clamping plate (545) is sleeved on the inner ring clamping shaft (543) and located below the locking nut (544). Tightening the locking nut (544) clamps and positions the inner ring (1003) of the casing between the upper inner ring clamping plate (545) and the lower support plate (5431).

7. A positioning fixture for welding an intake casing according to any one of claims 1-6, characterized in that, The casing positioning fixture (5) further includes a casing support assembly (55) for supporting the bottom end face of each casing support plate (1001) to prevent welding deformation of the casing support plate (1001).

8. A positioning fixture for welding an intake casing according to claim 7, characterized in that, The casing support plate assembly (55) includes: Mounting ring plate (551), the bottom end of which is fixed to the top surface of the welding station conversion turntable (3); The support plate telescopic motor (552) consists of multiple motors fixed to the outer wall of the mounting ring plate (551) and arranged in a ring shape. Support plate support block (553), there are multiple support plate support blocks (553), the bottom ends of multiple support plate support blocks (553) are respectively fixedly connected to the telescopic ends of multiple support plate telescopic motors (552), and the top ends of multiple support plate support blocks (553) respectively abut against the bottom end surfaces of multiple casing support plates (1001).

9. A method of using the positioning fixture for welding the intake casing as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: Place the intake casing (100) on the welding station turntable (3); S2: The intake casing (100) is clamped and positioned by the casing positioning fixture (5), and one of the welding points (200) is placed at the welding station. The welding station conversion turntable (3) is locked and fixed by the locking part (4) so ​​that the intake casing (100) remains stable. S3: Use a welding device to weld the welding point (200); S4: After the welding point (200) is completed, unlock the locking part (4), rotate the welding station conversion turntable (3) to make the next welding point (200) rotate to the welding station, and relock the locking part (4) to fix the position of the welding station conversion turntable (3), and then perform welding through the welding device; S5: Repeat step S4 to complete the welding of all welding points (200) on the intake casing (100).

10. A method of using a positioning fixture for welding an intake casing according to claim 9, characterized in that, The specific process of step S2 is as follows: S2.1: The lifting drive (511) adjusts the height of the outer ring support plate (512) of the casing so that the outer ring (1002) of the casing is at the predetermined welding height position; S2.2: Vertically clamp and position the outer ring (1002) of the casing by using vertical clamping clamps (52); S2.3: Then the clamping spring (533) radially clamps and positions the inner wall of the outer ring (1002) of the casing through the radial clamping block (534), and provides radial floating clamping force through the clamping spring (533); S2.4: The lower support plate (5431) is lifted by the inner ring telescopic motor (542) so that the lower support plate (5431) abuts against and supports the bottom end face of the inner ring (1003) of the casing. Then, the locking nut (544) is rotated to clamp and position the inner ring (1003) of the casing between the upper pressure plate (545) and the lower support plate (5431) of the inner ring, thereby completing the axial pressing and locking of the inner ring (1003) of the casing. S2.5: The support plate support block (553) is driven to move upward by the support plate telescopic motor (552), so that the support plate support block (553) abuts against and supports the casing support plate (1001) to limit the deformation of the casing support plate (1001) during the welding process. S2.6: Tighten the top screw (42) so that the end of the screw of the top screw (42) is in contact with the top surface of the fixed base plate (1) so that the intake casing is kept in a stable state.

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