Vacuum welding clamp for internal support honeycomb assembly of engine guide vane

Abstract

The invention discloses a vacuum welding clamp for an engine guide vane inner supporting honeycomb assembly, relates to the technical field of vacuum welding, and aims to solve the problem that an existing vacuum welding clamp can cause the situation that a clamping part of the engine guide vane inner supporting honeycomb assembly is missed in the vacuum brazing process, the vacuum welding clamp comprises a vane inner cavity, and a bearing platform is arranged outside the vane inner cavity. According to the vacuum welding clamp for the engine guide vane inner supporting honeycomb assembly, when the device is used for welding the engine guide vane inner supporting honeycomb assembly, the clamping blocks are alternately used at intervals, and brazing filler metal between a vane inner cavity and a honeycomb core material is heated and melted through a vacuum brazing furnace; and the situation that molten brazing filler metal is extruded out of a clamping part due to long-time extrusion of the honeycomb core material by the clamping block is avoided, so that effective distribution of the molten brazing filler metal is guaranteed, the situation of solder skips is avoided, connection of the honeycomb core material and the inner cavity of the blade is guaranteed, and the welding effect is improved.

Description

Technical Field

[0001] This invention relates to the field of vacuum welding technology, and in particular to a vacuum welding fixture for an engine guide vane inner support honeycomb assembly. Background Technology

[0002] The internal support honeycomb assembly of the engine guide vane is an ingenious structure in modern advanced cooling design. It cleverly integrates mechanical support, vibration damping and enhanced heat transfer by introducing a layer of brazed metal honeycomb inside. While the manufacturing technology of general metal cutting and welding equipment such as automatic and semi-automatic electric arc welding and plasma arc welding is very mature, vacuum brazing is still the only feasible and mature special process to achieve reliable connection of complex, dissimilar and thin-walled structures for such precision components under extreme working conditions, ensuring the structural integrity and functional stability of the assembly throughout the engine's entire life cycle.

[0003] When the honeycomb assembly supporting the engine guide vane is held in a fixture and heated in a vacuum brazing furnace, the existing welding fixtures hold the honeycomb core material and the inner cavity of the blade together for a long time. As the brazing filler metal between the honeycomb core material and the inner cavity of the blade is heated and melted, it is squeezed to the outside of the clamping area under the action of force. This causes incomplete welding between the honeycomb core material and the inner cavity of the blade at the clamping area, which has a significant impact on the welding quality. Summary of the Invention

[0004] This invention discloses a vacuum welding fixture for an engine guide vane inner support honeycomb assembly, which aims to solve the technical problem that existing vacuum welding fixtures cause incomplete welding at the clamping part of the engine guide vane inner support honeycomb assembly during vacuum brazing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A vacuum welding fixture for an engine guide vane inner support honeycomb assembly includes a blade inner cavity. A support platform is provided on the outside of the blade inner cavity, and a placement groove is provided on the upper side of the support platform. The inner wall of the placement groove is slidably connected to the outside of the blade inner cavity. A base bracket is fixedly connected to the bottom of the support platform, and a central rod is provided on the base bracket. Multiple clamping blocks are arranged circumferentially and evenly on the central rod, and a spaced clamping module is provided on the outside of the central rod. The inner wall of the blade inner cavity is provided with a honeycomb core material, and the outside of the honeycomb core material contacts the outside of three of the clamping blocks. A positioning calibration module is provided on the base bracket. The spaced clamping module includes a transmission ring and a moving ring. A connecting ring is movably connected to the outside of the moving ring. The external movable connection of the transmission ring has three push-pull rods equidistantly distributed in a circle. The external movable connection of the transmission ring has three push rods equidistantly distributed in a circle. One end of each push rod and push-pull rod is movably connected to a rotating seat. The external of each rotating seat is fixedly connected to the external of the clamping block on the same side. Each clamping block is equipped with a pressure sensor, and the external of each pressure sensor is in contact with the external of the rotating seat. The external movable connection of the central rod has two intersecting tri-leaf limiting plates. The external of the upper tri-leaf limiting plate is in contact with the external of the clamping block on the same side. The external fixed connection of the central rod has a mounting plate with multiple equidistantly distributed movable grooves in a circle. The inner wall of each movable groove is slidably connected to the external of the clamping block.

[0006] In a preferred embodiment, a threaded sleeve is fixedly connected to the outside of the central rod. The threaded sleeve is located above the mounting plate, and the outside of the threaded sleeve is rotatably connected to the inner wall of the moving ring via an external thread. A reserved groove is provided on the upper side of the central rod, and a rotating motor is fixedly connected to the bottom inner wall of the reserved groove. The output end of the rotating motor is connected to a drive shaft via a coupling. A sealing cover is fixedly connected to the upper side of the drive shaft, and the bottom of the sealing cover is slidably connected to the upper side of the central rod. The bottom of the sealing cover has three circumferentially equidistant circular openings, each containing a movable rod. The bottom of each movable rod is fixedly connected to the upper side of the moving ring. A fixed platform is fixedly connected to the outside of the central rod, located below the mounting plate. Two symmetrical hydraulic rods are fixedly connected to the upper side of the fixed platform. The output ends of the hydraulic rods are fixedly connected to the bottom of the transmission ring. The mounting plate has three circumferentially spaced arc-shaped grooves, each containing a sliding connecting rod. The bottom and top of each of the three connecting rods are fixedly connected to the outside of two three-lobed limiting plates. A recessed hole is formed on the central rod, with a drive motor fixedly connected to its inner wall. A curved groove is formed on the inner wall of the recessed hole, containing a sliding actuating block. The output end of the drive motor is connected to the upper side of the actuating block via a coupling. The end of the actuating block away from the drive motor is fixedly connected to the inner wall of the bottom three-leaf limiting plate; each of the multiple clamping blocks has a hollow groove on the side away from the central rod, and two symmetrical springs are fixedly connected to the inner wall of each hollow groove. A contact block is fixedly connected to the end of each spring away from the central rod. The outer side of each contact block is slidably connected to the inner wall of the hollow groove, and the side of each contact block away from the clamping block is in contact with the outer side of the honeycomb core material; the support platform has multiple circumferentially equidistant fixing grooves, each fixing groove having a limiting component slidably connected inside. The outer side of each limiting component is engaged with the outer side of the blade's inner cavity, and a steel wire rope is fixedly connected to the bottom of each limiting component. The end of the wire rope furthest from the limiting component is fixedly connected to a hook. A pressure ring is provided below the support. The outer side of the pressure ring has multiple circumferentially distributed notches. Short rods are fixedly connected to the inner walls of the notches. The outer side of the short rods is engaged with the outer side of the hooks on the same side. Multiple circumferentially distributed small holes are opened on the pressure ring. A round shaft is slidably connected in each small hole. The upper side of the round shaft is fixedly connected to the bottom of the support. The outer side of the round shaft has a threaded groove. An adjusting ring is provided outside the threaded groove. A spring is wrapped around the outer side of the round shaft. One end of the spring contacts the bottom of the adjusting ring, and the other end is fixedly connected to the upper side of the pressure ring.

[0007] In a preferred embodiment, the positioning calibration module includes multiple adjusting screws distributed circumferentially. The outer surface of the support platform has multiple threaded holes distributed circumferentially. The inner walls of each threaded hole are rotatably connected to the outer surface of the adjusting screw on the same side via external threads. The bottom inner wall of the placement slot has multiple recessed holes distributed circumferentially. Each recessed hole has a slidingly connected push rod. The bottom of each push rod has an inclined surface, the outer surface of which is slidably connected to the outer surface of the adjusting screw on the same side. The base bracket has a slot containing a lead screw. A receiving block is movably connected to the upper side of the lead screw. The upper side of the receiving block is fixedly connected to the bottom of the central rod. A follower ring is provided on the outer surface of the lead screw. The upper side of the follower ring is movably connected to the bottom of the base bracket. An annular friction plate is fixedly connected to the outer surface of the follower ring. A rotating frame is provided on the outer surface of the lead screw. The rotating frame is movably connected to the bottom of the base bracket. Multiple circumferentially distributed curved blocks are fixedly connected to the inner wall of the rotating frame. Multiple circumferentially distributed contact pieces are provided on the outside of the annular friction pad. Mounting blocks are fixedly connected to the outside of each contact piece. An arc-shaped block is fixedly connected to the side of each mounting block away from the contact piece. The outside of each arc-shaped block is slidably connected to the outside of the curved block on the same side. A groove is provided on the side of each arc-shaped block near the curved block. The inner wall of the groove is engaged with the outside of the curved block. A lever is fixedly connected to the outside of the rotating frame. A rectangular block is fixedly connected to the bottom of each of the mounting blocks. An outer bracket is slidably connected to the outside of each rectangular block. The upper side of the outer bracket is fixedly connected to the bottom of the base bracket. The outer bracket is located outside the rotating frame. A spring is fixedly connected to the bottom of each outer bracket. The end of each spring away from the outer bracket is fixedly connected to the outside of the rectangular block on the same side.

[0008] As can be seen from the above, the vacuum welding fixture for the inner support honeycomb assembly of the engine guide vane provided by the present invention has the technical effect of ensuring effective distribution of the molten brazing material, avoiding incomplete welding, and ensuring the connection between the honeycomb core material and the inner cavity of the blade after the vacuum brazing furnace heats and melts the brazing filler metal. This is achieved by using the clamping blocks alternately at intervals when welding the inner support honeycomb assembly of the engine guide vane. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of a vacuum welding fixture for an engine guide vane inner support honeycomb assembly proposed in this invention.

[0010] Figure 2 This is a cross-sectional view of a vacuum welding fixture for an engine guide vane inner support honeycomb assembly proposed in this invention.

[0011] Figure 3This is a bottom view of the vacuum welding fixture for the inner support honeycomb assembly of an engine guide vane proposed in this invention.

[0012] Figure 4 This is a schematic diagram of the mounting plate structure of a vacuum welding fixture for an engine guide vane inner support honeycomb assembly proposed in this invention.

[0013] Figure 5 This is a schematic diagram of the central rod structure of a vacuum welding fixture for an engine guide vane inner support honeycomb assembly proposed in this invention.

[0014] Figure 6 This is a schematic diagram of the threaded sleeve structure of a vacuum welding fixture for an engine guide vane inner support honeycomb assembly proposed in this invention.

[0015] Figure 7 This is a schematic diagram of the three-blade limiting plate structure of a vacuum welding fixture for an engine guide vane inner support honeycomb assembly proposed in this invention.

[0016] Figure 8 This is a schematic diagram of the clamping block structure of a vacuum welding fixture for an engine guide vane inner support honeycomb assembly proposed in this invention.

[0017] Figure 9 This is a schematic diagram of the limiting component and the lower pressure ring structure of a vacuum welding fixture for an engine guide vane inner support honeycomb assembly proposed in this invention.

[0018] Figure 10 This is a schematic diagram of the positioning calibration module and support structure of a vacuum welding fixture for an engine guide vane inner support honeycomb assembly proposed in this invention.

[0019] Figure 11 This is a schematic diagram of the mounting block structure of a vacuum welding fixture for an engine guide vane inner support honeycomb assembly proposed in this invention.

[0020] In the diagram: 1. Blade inner cavity; 2. Support platform; 3. Placement slot; 4. Base bracket; 5. Center rod; 6. Clamping block; 7. Interval clamping module; 701. Mounting plate; 702. Movable slot; 703. Fixed platform; 704. Hydraulic rod; 705. Transmission ring; 706. Push rod; 707. Threaded sleeve; 708. Moving ring; 709. Connecting ring; 710. Push-pull rod; 711. Reserved slot; 712. Rotating motor; 713. Transmission shaft; 714. Sealing cover; 715. Movable rod; 716. Transmission motor; 717. Actuating block; 718. Arc-shaped groove; 719. Connecting rod; 720. Three-lobe limiting plate; 721. Rotating seat; 722. Pressure sensor; 723. Hollowed-out part. 724. Groove; 725. Spring 1; 726. Contact block; 727. Fixing groove; 728. Limiting component; 729. Steel wire rope; 730. Hook; 731. Pressure ring; 732. Short rod; 733. Round shaft; 734. Adjusting ring; 735. Spring 2; 8. Positioning calibration module; 801. Adjusting screw; 802. Top rod; 803. Lead screw; 804. Receiving block; 805. Annular friction plate; 806. Handle; 807. Rotating frame; 808. Toggle lever; 809. Curved block; 810. Mounting block; 811. Contact plate; 812. Arc block; 813. Groove; 814. Outer bracket; 815. Rectangular block; 816. Spring 3; 817. Follower ring; 9. Honeycomb core material. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] The vacuum welding fixture for the inner support honeycomb assembly of the engine guide vane disclosed in this invention is mainly used in scenarios where existing vacuum welding fixtures may cause incomplete welding at the clamping part of the inner support honeycomb assembly of the engine guide vane during vacuum brazing.

[0023] Reference Figures 1-11A vacuum welding fixture for an engine guide vane inner support honeycomb assembly includes a blade inner cavity 1, a support platform 2 on the outside of the blade inner cavity 1, a placement groove 3 on the upper side of the support platform 2, the inner wall of the placement groove 3 being slidably connected to the outside of the blade inner cavity 1, a base bracket 4 bolted to the bottom of the support platform 2, a central rod 5 on the base bracket 4, multiple circumferentially equidistant clamping blocks 6 on the central rod 5, and an interval clamping module 7 on the outside of the central rod 5, a honeycomb core material 9 on the inner wall of the blade inner cavity 1, the outside of the honeycomb core material 9 contacting the outside of three of the clamping blocks 6, and a positioning calibration module 8 on the base bracket 4. The interval clamping module 7 includes a transmission ring 705 and a moving ring 708, a connecting ring 709 rotatably connected to the outside of the moving ring 708 via a bearing, and three circumferentially equidistant clamping blocks 6 rotatably connected to the outside of the connecting ring 709 via a bearing. The push-pull rods 710 are distributed at a distance. The transmission ring 705 is rotatably connected to three circumferentially distributed push rods 706 via bearings. One end of each push rod 706 and push-pull rod 710 is rotatably connected to a rotating seat 721 via bearings. The outside of each rotating seat 721 is bolted to the outside of a clamping block 6 on the same side. Each clamping block 6 is equipped with a pressure sensor 722. The outside of each pressure sensor 722 is in contact with the outside of the rotating seat 721. The outside of the center rod 5 is rotatably connected to two interlocking tri-leaf limiting plates 720 via bearings. The outside of the upper tri-leaf limiting plate 720 is in contact with the outside of the clamping block 6 on the same side. The outside of the center rod 5 is bolted to a mounting plate 701. The mounting plate 701 has multiple circumferentially distributed movable grooves 702. The inner walls of each movable groove 702 are slidably connected to the outside of the clamping block 6.

[0024] Specifically, the device utilizes the interval clamping module 7 to ensure that when welding the honeycomb assembly supporting the engine guide vane, the alternating use of the clamping blocks 6 allows the brazing furnace to heat and melt the brazing filler metal between the inner cavity 1 of the blade and the honeycomb core material 9. This prevents the molten brazing filler metal from being squeezed out of the clamping area due to prolonged pressure of the clamping blocks 6 on the honeycomb core material 9, thus ensuring the effective distribution of the molten brazing filler metal, avoiding incomplete welding, ensuring the connection between the honeycomb core material 9 and the inner cavity 1 of the blade, and improving the welding effect.

[0025] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9In a preferred embodiment, a threaded sleeve 707 is bolted to the outside of the center rod 5. The threaded sleeve 707 is located above the mounting plate 701. The outside of the threaded sleeve 707 is rotatably connected to the inner wall of the moving ring 708 via an external thread. A reserved groove 711 is provided on the upper side of the center rod 5. A rotating motor 712 is bolted to the bottom inner wall of the reserved groove 711. The output end of the rotating motor 712 is connected to a drive shaft 713 via a coupling. A sealing cover 714 is bolted to the upper side of the drive shaft 713. The bottom of the closing cover 714 is slidably connected to the upper side of the central rod 5, and the bottom of the closing cover 714 has three circular openings evenly distributed around the circumference. A movable rod 715 is slidably connected to each of these openings, and the bottom of each movable rod 715 is bolted to the upper side of the moving ring 708. A fixed platform 703 is bolted to the outside of the central rod 5. The fixed platform 703 is located below the mounting plate 701, and two symmetrical hydraulic rods 704 are bolted to the upper side of the fixed platform 703. The output ends of the hydraulic rods 704 are connected to the bottom of the transmission ring 705. The mounting plate 701 is bolted together and has three circumferentially equidistant arc-shaped grooves 718. Each arc-shaped groove 718 is slidably connected to a connecting rod 719. The bottom and top of each of the three connecting rods 719 are bolted to the outside of two three-lobed limiting plates 720. A recessed hole is formed on the center rod 5, and a drive motor 716 is bolted to the inner wall of the recessed hole. A curved groove is formed on the inner wall of the recessed hole, and a toggle block 717 is slidably connected within the curved groove. The output end of the drive motor 716 is connected to the upper side of the toggle block 717 via a coupling. Furthermore, the end of the actuating block 717 away from the drive motor 716 is bolted to the inner wall of the bottom three-leaf limiting plate 720; multiple clamping blocks 6 are provided with hollow grooves 723 on the side away from the central rod 5, and the inner wall of the hollow grooves 723 is bolted to two symmetrical springs 724. The end of the springs 724 away from the central rod 5 is bolted to a contact block 725. The outside of the contact block 725 is slidably connected to the inner wall of the hollow groove 723, and the side of the contact block 725 away from the clamping block 6 is in contact with the outside of the honeycomb core material 9;The support platform 2 has multiple circumferentially equidistant fixing grooves 726. Each fixing groove 726 is slidably connected to a limiting element 727. The outer surface of each limiting element 727 is engaged with the outer surface of the blade cavity 1. A steel wire rope 728 is bolted to the bottom of each limiting element 727. A hook 729 is bolted to the end of each steel wire rope 728 away from the limiting element 727. A lower pressure ring 730 is located below the support platform 2. The outer surface of the lower pressure ring 730 has multiple circumferentially equidistant notches. Short rods 731 are bolted to the inner walls of each notch. The short rod 731 is externally engaged with the hook 729 on the same side. The lower pressure ring 730 has multiple circumferentially spaced fine holes, each containing a slidably connected round shaft 732. The upper side of each round shaft 732 is bolted to the bottom of the support 2. Each round shaft 732 has a threaded groove on its exterior, and an adjusting ring 733 is located outside each threaded groove. A second spring 734 surrounds the exterior of each round shaft 732. One end of each spring 734 contacts the bottom of the adjusting ring 733, and the other end is bolted to the upper side of the lower pressure ring 730.

[0026] In specific application scenarios, the interval clamping module 7 is mainly suitable for the interval clamping stage in the interval clamping process. Specifically, the interval clamping module 7 utilizes a moving ring 708, a push-pull rod 710, a movable groove 702, a transmission ring 705, a push rod 706, and a clamping block 6 to enable the device to perform interval cyclic clamping. This ensures that the device maintains the fixed position of the honeycomb core material 9 and the blade inner cavity 1 at all times. Simultaneously, by uniformly applying pressure to the honeycomb core material 9, it ensures that the molten brazing filler metal is evenly distributed on the honeycomb core material 9 and the contact surface between the honeycomb core material 9 and the blade inner cavity 1 during welding. This reduces the concentrated distribution of molten brazing filler metal, making the temperature field of the welding surface more uniform and reducing thermal stress. The module also utilizes a drive motor 716, a toggle block 717, and a clamping block 6 to achieve this. The connecting rod 719 and the three-leaf limiting plate 720 can lock the position of the clamping block 6 during the alternating clamping process, thereby preventing the honeycomb core material 9 from shifting due to the loss of sufficient adhesion between the molten brazing filler metal and the blade inner cavity 1 during the alternating switching process. This ensures the stability of the relative position between the blade inner cavity 1 and the honeycomb core material 9, ensuring the stability of the device and improving the welding quality. The contact block 725, the hollow groove 723, the spring 724, and the pressure sensor 722 can be used to control the pressure applied by the clamping block 6 to the honeycomb core material 9 and the blade inner cavity 1, thereby preventing excessive pressure on the clamping block 6 from causing deformation of the blade inner cavity 1 and the honeycomb core material 9 at high temperatures.

[0027] Reference Figure 10 and Figure 11In a preferred embodiment, the positioning calibration module 8 includes multiple adjusting screws 801 circumferentially distributed. The outer surface of the support 2 has multiple threaded holes circumferentially distributed, the inner walls of which are rotatably connected to the outer surfaces of the adjusting screws 801 on the same side via external threads. The bottom inner wall of the placement groove 3 has multiple recessed holes circumferentially distributed, the inner walls of which are slidably connected to top rods 802. The bottom of each top rod 802 has an inclined surface, the outer surface of which is slidably connected to the outer surface of the adjusting screws 801 on the same side. The base bracket 4... A slot is provided, and a lead screw 803 is installed in the slot. A receiving block 804 is rotatably connected to the upper side of the lead screw 803 via a bearing. The upper side of the receiving block 804 is bolted to the bottom of the central rod 5. A follower ring 817 is provided on the outside of the lead screw 803. The upper side of the follower ring 817 is rotatably connected to the bottom of the base bracket 4 via a bearing. An annular friction plate 805 is bolted to the outside of the follower ring 817. A rotating frame 807 is provided on the outside of the lead screw 803. The upper side of the rotating frame 807 is rotatably connected to the bottom of the base bracket 4 via a bearing. The inner wall of the 7 is bolted with multiple circumferentially equidistant curved surface blocks 809, and the outer side of the annular friction plate 805 is provided with multiple circumferentially equidistant contact pieces 811. Each contact piece 811 is bolted with a mounting block 810. On the side of the mounting block 810 away from the contact piece 811, an arc-shaped block 812 is bolted. The outer side of each arc-shaped block 812 is slidably connected to the outer side of the curved surface block 809 on the same side. Each arc-shaped block 812 has a groove 813 on the side near the curved surface block 809. The inner wall of the groove 813 is flush with the curved surface block 809. All external components of 9 are snap-fitted together. The external of the rotating frame 807 is bolted to a lever 808. The bottom of multiple mounting blocks 810 is bolted to a rectangular block 815. The external of the rectangular block 815 is slidably connected to an outer bracket 814. The upper side of the outer bracket 814 is bolted to the bottom of the base bracket 4. The outer bracket 814 is located outside the rotating frame 807. The bottom of the outer bracket 814 is bolted to a spring 816. The end of the spring 816 away from the outer bracket 814 is bolted to the external of the rectangular block 815 on the same side.

[0028] In specific application scenarios, the positioning calibration module 8 is mainly used in the positioning calibration process. That is, the positioning calibration module 8 uses the adjusting screw 801, the push rod 802 and the lead screw 803 to enable the device to complete the calibration of the position of the welding surface and the clamping block 6 on the inner cavity 1 of the blade. This allows the device to accurately control the position of the honeycomb core material 9 on the inner cavity 1 of the blade, ensuring the accuracy of welding, reducing the occurrence of defective products, reducing the probability of rework, and controlling costs.

[0029] Working principle: Overcoming the elastic force of spring 734, the lower pressure ring 730 is pushed upward, causing the wire rope 728 to be in a relaxed state. The limiting member 727 is pulled out from the wire rope 728, and the inner cavity 1 of the blade to be welded is placed into the placement groove 3 on the bearing 2. The lower pressure ring 730 is released. Under the weight of the lower pressure ring 730 and the elastic force of spring 734, the wire rope 728 tightens, pulling the limiting member 727 down into the fixing groove 726, pressing the inner cavity 1 of the blade into place. On the support 2, a solder paste is applied to the contact surface between the honeycomb core material 9 and the inner wall of the blade cavity 1. The honeycomb core material 9 is placed at the welding position where it adheres to the blade cavity 1. The hydraulic rod 704 is activated, and its output end pushes the transmission ring 705 upward. This causes the transmission ring 705 to push the clamping block 6 outward from the mounting plate 701, making the contact block 725 on the clamping block 6 contact the outside of the honeycomb core material 9 and overcome the spring pressure as it moves. The elastic force of spring 724 slides inward in the hollowed-out groove 723 until spring 724 is fully compressed. The outer edge of clamping block 6 will then fasten to the outside of honeycomb core material 9, fixing honeycomb core material 9 to the inner cavity 1 of the blade. The drive motor 716 is started, and the drive motor 716 drives the actuating block 717 to rotate, causing the upper three-leaf limiting plate 720 to rotate to a position that abuts the outside of clamping block 6 in contact with honeycomb core material 9. At this time, the position of clamping block 6 in contact with honeycomb core material 9 is locked, and the pressure data on pressure sensor 722 is recorded. During the process of heating the brazing filler metal in the vacuum brazing furnace, the brazing filler metal melts and diffuses to the contact surface between honeycomb core material 9 and inner cavity 1 of blade. Some of the brazing filler metal is absorbed by the honeycomb structure in honeycomb core material 9, and the other part remains in the gap. Due to the squeezing force of clamping block 6 on honeycomb core material 9, the molten brazing filler metal on the contact surface is squeezed to the outside of the contact surface. At this time, the rotation motor 712 is started.The rotating motor 712 drives the transmission shaft 713 to rotate, causing the movable rod 715 to drive the moving ring 708 to rotate. The moving ring 708 rotates and descends on the threaded sleeve 707. The connecting ring 709 on the moving ring 708 pushes the clamping block 6 connected to the push-pull rod 710 to move outward of the mounting plate 701 until the contact block 725 on the clamping block 6 is in close contact with the outside of the honeycomb core material 9. Adjust the pressing force of the transmission ring 705 on the honeycomb core material 9 to be the same as the previous pressure value. Start the transmission motor 716 again, causing the actuating block 717 to drive the three-leaf limit plate 720 to rotate, so that the upper three-leaf limit plate 720 releases the three clamping blocks 6 in the above steps. The clamping of the honeycomb core material 9 causes the hydraulic rod 704 to drive the push rod 706 to pull back the clamping block 6. The actuating block 717 continues to rotate, causing the lower three-leaf limiting plate 720 to rotate to the position where it abuts the clamping block 6. Under the pressure of the clamping block 6, the newly clamped clamping block 6 will, through the transmission of extrusion force, squeeze the molten brazing material back into the blank area created by the previous extrusion. Following the above operation, after the vacuum brazing furnace gradually cools down, this process is repeated multiple times. As the temperature decreases, the brazing material in the blank area will solidify in layers after being squeezed back, until all the brazing material is completely solidified. After the blade inner cavity 1 is placed on the placement groove 3, if the bottom of the blade inner cavity 1 cannot be completely solidified... If the welding surface of the honeycomb core material 9 to the inner cavity 1 of the blade is not horizontal, use a screwdriver to rotate the adjusting screw 801. This moves the adjusting screw 801 closer to or further away from the push rod 802, causing the push rod 802 to extend or retract from the placement groove 3. This adjusts the welding surface on the inner cavity 1 of the blade to a horizontal state. Rotate the rotating frame 807 counterclockwise to make the curved block 809 slide along the outer surface of the arc block 812, releasing the lock on the groove 813. Under the tension of the spring 816, the rectangular block 815 causes the contact piece 811 connected to the mounting block 810 to disengage from the annular friction piece 805. The contact piece 811 is brought into contact with the annular friction piece 805, thus relieving the pressure of the contact piece 811 on the annular friction piece 805. Rotating the handle 806 causes the lead screw 803 to rotate, raising or lowering the center rod 5 connected to the receiving block 804. This allows the clamping block 6 on the mounting plate 701 to be on the same plane as the honeycomb core material 9. Grasping the lever 808 and rotating the rotating frame 807 clockwise causes the curved block 809 to contact the arc-shaped block 812 during rotation, pushing the mounting block 810 connected to the arc-shaped block 812 to overcome the tension of the spring 816 and move towards the annular friction piece 805, ultimately pressing it tightly against the annular friction piece 805, causing the lead screw 803 to stop rotating.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A vacuum welding fixture for an engine guide vane inner support honeycomb assembly, comprising a blade inner cavity (1), characterized in that, A support platform (2) is provided on the outside of the blade cavity (1). A placement groove (3) is provided on the upper side of the support platform (2). The inner wall of the placement groove (3) is slidably connected to the outside of the blade cavity (1). A base bracket (4) is fixedly connected to the bottom of the support platform (2). A central rod (5) is provided on the base bracket (4). Multiple clamping blocks (6) are arranged in a circular equidistant pattern on the central rod (5). An interval clamping module (7) is provided on the outside of the central rod (5). A honeycomb core material (9) is provided on the inner wall of the blade cavity (1). The outside of the honeycomb core material (9) is in contact with the outside of three of the clamping blocks (6). A positioning calibration module (8) is provided on the base bracket (4). The interval clamping module (7) includes a transmission ring (705) and a moving ring (708). A connecting ring (709) is movably connected to the outside of the moving ring (708). Three pushers are movably connected to the outside of the connecting ring (709) in a circular equidistant pattern. The pull rod (710) and the transmission ring (705) are externally connected to three push rods (706) that are equidistantly distributed in a circle. One end of each push rod (706) and the push rod (710) is movably connected to a rotating seat (721). The outside of each rotating seat (721) is fixedly connected to the outside of a clamping block (6) on the same side. Each clamping block (6) is equipped with a pressure sensor (722). The outside of each pressure sensor (722) is fixedly connected to the outside of the rotating seat (721). The center rod (5) has two intersecting tri-leaf limiting plates (720) on its outside. The outside of the upper tri-leaf limiting plate (720) is in contact with the outside of the clamping block (6) on the same side. The center rod (5) is fixedly connected to a mounting plate (701). The mounting plate (701) has multiple circumferentially distributed movable grooves (702). The inner walls of the movable grooves (702) are all slidably connected to the outside of the clamping block (6).

2. The vacuum welding fixture for the inner support honeycomb assembly of an engine guide vane according to claim 1, characterized in that, A threaded sleeve (707) is fixedly connected to the outside of the central rod (5). The threaded sleeve (707) is located above the mounting plate (701). The outside of the threaded sleeve (707) is rotatably connected to the inner wall of the moving ring (708) through an external thread. A reserved groove (711) is provided on the upper side of the central rod (5). A rotating motor (712) is fixedly connected to the bottom inner wall of the reserved groove (711). The output end of the rotating motor (712) is connected to a drive shaft (713) through a coupling. A closed cover (714) is fixedly connected to the upper side of the drive shaft (713). The bottom of the closed cover (714) is slidably connected to the upper side of the central rod (5). The bottom of the closed cover (714) is provided with three circular openings that are equidistantly distributed around the circumference. A movable rod (715) is slidably connected to each of the circular openings. The bottom of each movable rod (715) is fixedly connected to the upper side of the moving ring (708).

3. The vacuum welding fixture for the inner support honeycomb assembly of an engine guide vane according to claim 1, characterized in that, The center rod (5) is fixedly connected to a fixed platform (703). The fixed platform (703) is located below the mounting plate (701). Two symmetrical hydraulic rods (704) are fixedly connected to the upper side of the fixed platform (703). The output ends of the hydraulic rods (704) are fixedly connected to the bottom of the transmission ring (705). The mounting plate (701) has three arc-shaped grooves (718) that are equidistantly distributed in a circle. Each arc-shaped groove (718) is slidably connected to a connecting rod (719).

4. The vacuum welding fixture for the inner support honeycomb assembly of an engine guide vane according to claim 3, characterized in that, The bottom and top of the three connecting rods (719) are respectively fixedly connected to the outside of the two three-leaf limiting plates (720). The center rod (5) has a concave hole, and a drive motor (716) is fixedly connected to the inner wall of the concave hole. A curved groove is provided on the inner wall of the concave hole, and a toggle block (717) is slidably connected in the curved groove. The output end of the drive motor (716) is connected to the upper side of the toggle block (717) through a coupling, and the end of the toggle block (717) away from the drive motor (716) is fixedly connected to the inner wall of the bottom three-leaf limiting plate (720).

5. A vacuum welding fixture for an engine guide vane inner support honeycomb assembly according to claim 1, characterized in that, Each of the clamping blocks (6) has a hollowed-out groove (723) on the side away from the central rod (5). Two symmetrical springs (724) are fixedly connected to the inner wall of each hollowed-out groove (723). A contact block (725) is fixedly connected to the end of each spring (724) away from the central rod (5). The outside of the contact block (725) is slidably connected to the inner wall of the hollowed-out groove (723), and the side of the contact block (725) away from the clamping block (6) is in contact with the outside of the honeycomb core material (9).

6. A vacuum welding fixture for an engine guide vane inner support honeycomb assembly according to claim 1, characterized in that, The support platform (2) is provided with multiple circumferentially equidistant fixing grooves (726). Each fixing groove (726) is slidably connected to a limiting member (727). The outer side of each limiting member (727) is engaged with the outer side of the blade cavity (1). A steel wire rope (728) is fixedly connected to the bottom of each limiting member (727). A hook (729) is fixedly connected to the end of each steel wire rope (728) away from the limiting member (727). A pressure ring (730) is provided below the support platform (2). The outer side of the pressure ring (730) is provided with multiple circumferentially equidistant notches. A short rod (73) is fixedly connected to the inner wall of each notch. 1) The outside of the short rod (731) is engaged with the outside of the hook (729) on the same side. The lower pressure ring (730) has multiple small holes that are equidistantly distributed in a circle. A round shaft (732) is slidably connected in each of the small holes. The upper side of the round shaft (732) is fixedly connected to the bottom of the support (2). The outside of the round shaft (732) is provided with a threaded groove. An adjusting ring (733) is provided outside the threaded groove. A second spring (734) is surrounded around the outside of the round shaft (732). One end of the second spring (734) is in contact with the bottom of the adjusting ring (733), and the other end is fixedly connected to the upper side of the lower pressure ring (730).

7. A vacuum welding fixture for an engine guide vane inner support honeycomb assembly according to claim 1, characterized in that, The positioning calibration module (8) includes multiple adjusting screws (801) distributed circumferentially. The outer side of the support (2) is provided with multiple threaded holes distributed circumferentially. The inner wall of each threaded hole is rotatably connected to the outer side of the adjusting screw (801) on the same side through external threads. The bottom inner wall of the placement groove (3) is provided with multiple sinking holes distributed circumferentially. The inner wall of each sinking hole is slidably connected with a top rod (802). The bottom of each top rod (802) is provided with an inclined surface. The outer side of each inclined surface is slidably connected to the outer side of the adjusting screw (801) on the same side.

8. A vacuum welding fixture for an engine guide vane inner support honeycomb assembly according to claim 1, characterized in that, The bottom bracket (4) has a slot, and a lead screw (803) is installed in the slot. A receiving block (804) is movably connected to the upper side of the lead screw (803). The upper side of the receiving block (804) is fixedly connected to the bottom of the center rod (5), and a follower ring (817) is provided on the outside of the lead screw (803).

9. A vacuum welding fixture for an engine guide vane inner support honeycomb assembly according to claim 8, characterized in that, The upper side of the follower ring (817) is movably connected to the bottom of the base bracket (4). An annular friction plate (805) is fixedly connected to the outside of the follower ring (817). A rotating frame (807) is provided outside the lead screw (803). The upper side of the rotating frame (807) is movably connected to the bottom of the base bracket (4). Multiple circumferentially equidistant curved surface blocks (809) are fixedly connected to the inner wall of the rotating frame (807). Multiple circumferentially equidistant contact plates (811) are provided outside the annular friction plate (805). A mounting block (810) is fixedly connected to the outside of the contact piece (811). An arc-shaped block (812) is fixedly connected to the side of the mounting block (810) away from the contact piece (811). The outside of the arc-shaped block (812) is slidably connected to the outside of the curved block (809) on the same side. A groove (813) is provided on the side of the arc-shaped block (812) close to the curved block (809). The inner wall of the groove (813) is engaged with the outside of the curved block (809). A lever (808) is fixedly connected to the outside of the rotating frame (807).

10. A vacuum welding fixture for an engine guide vane inner support honeycomb assembly according to claim 9, characterized in that, A rectangular block (815) is fixedly connected to the bottom of each of the mounting blocks (810). An outer bracket (814) is slidably connected to the outside of each rectangular block (815). The upper side of the outer bracket (814) is fixedly connected to the bottom of the base bracket (4). The outer bracket (814) is located outside the rotating frame (807). A spring three (816) is fixedly connected to the bottom of each outer bracket (814). The end of the spring three (816) away from the outer bracket (814) is fixedly connected to the outside of the rectangular block (815) on the same side.

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