CN115121894B

CN115121894B - Vacuum brazing method and equipment for flareless pipeline connecting piece for aero-engine

Info

Publication number: CN115121894B
Application number: CN202211037034.9A
Authority: CN
Inventors: 王鹏; 任金茹
Original assignee: Xi'an Chengli Aviation Manufacturing Co ltd
Current assignee: Xi'an Chengli Aviation Manufacturing Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-11-18
Anticipated expiration: 2042-08-29
Also published as: CN115121894A

Abstract

The invention discloses a vacuum brazing method and equipment for a flareless pipeline connecting piece for an aircraft engine, and relates to the technical field of vacuum welding.

Description

Vacuum brazing method and equipment for flareless pipeline connecting piece for aircraft engine

Technical Field

The invention relates to the technical field of vacuum welding, in particular to a vacuum brazing method and equipment for a flareless pipeline connecting piece for an aircraft engine.

Background

The typical structure of the aircraft engine pipeline connecting piece commonly used at present can be generally divided into a flaring type structure and a non-flaring type structure, the pipeline connection development of the western countries is faster, the transition from 74-degree flaring type pipeline connection to 24-degree non-flaring clamping sleeve type pipeline connection is performed successively, the transition is performed to non-flaring extrusion type pipeline connection and non-flaring welding type pipeline connection, and other novel pipeline connection modes such as a memory alloy joint and the like are realized in recent years. The sealing principle of flared and non-flared pipeline connection is contact static sealing, and through the structural connection forms of a conduit, a pipeline connecting piece and the like, under the action of axial force and fluid pressure formed by threaded connection, extrusion is generated to form a sealing surface (line). The novel beam type sealing connection adopts an elastic beam type structure and realizes sealing by utilizing elastic deformation on the basis of simplifying the form of a connecting structure.

The pipe sleeve and the outer sleeve nut of the flaring-free welding type pipeline system connecting structure can be made of conventional materials and conventional processes, and the processing is convenient. But it is noted that problems of annealing, surface oxidation, and welding slag of the guide tube due to the hot welding prevent the strength reduction of the guide tube and the contamination of the system. The quality of the welding seam is checked at 100%, the welding seam is not allowed to have any crack, the main material of the welding part is not allowed to have typical welding quality problems such as crack, undercut, welding penetration and the like, the structure error compensation capability of the welding type pipeline system is insufficient, the manufacturing precision and dimensional tolerance control requirements are high, and the structure error mainly comprises the installation position deviation among the pipe sleeve, the guide pipe and the pipe joint.

The Chinese patent with application publication No. CN112620848A discloses a vacuum welding method for a hole shaft matching part slender weld joint, the front end of the hole shaft matching part of the vacuum brazing method is in tight fit, and nickel sheets with the same thickness are uniformly distributed at a conical surface along the circumference for spot welding, so that the welding gap is doubly ensured, the conical surface is prevented from being stuck in the assembling process, and the brazing quality of the slender weld joint is better ensured; the method only prevents the deformation generated in the vacuum welding process, still needs to carry out complex clamping and testing processes before spot welding, wastes time and labor after repeated testing and clamping, and can omit the step of carrying out electric welding, wastes time and increases the operation difficulty.

Disclosure of Invention

In view of the technical problems, the vacuum brazing method for the flareless pipeline connecting piece for the aircraft engine comprises the following steps:

the method comprises the following steps: the conduit, the brazed sleeve, the outer sleeve nut and the flawless conduit joint are arranged together to form a pipeline connecting assembly, the conduit and the brazed sleeve are stably clamped, and a gap between the conduit and the brazed sleeve is ensured to be uniform.

Step two: angular, radial and axial deviations between the catheter and the flareless catheter hub are detected.

Step three: after the detection result is qualified, the pipeline connecting assembly is released from clamping, the outer sleeve nut and the flareless type conduit joint are removed, and the conduit and the brazed sleeve are clamped together again; if the detection is not qualified, the detection is continued after the jacket nut is replaced.

Step four: and coating solder on the position to be welded between the guide pipe and the brazed sleeve.

Step five: and (5) conveying the mixture into a vacuum furnace for welding.

The invention further discloses vacuum brazing equipment used in the flareless pipeline connecting piece vacuum brazing method for the aero-engine, which comprises a fixing component and a vacuum furnace, wherein two sides of the fixing component are provided with adjusting components I, adjusting components II are arranged in the adjusting components I, adjusting components III are arranged in the adjusting components II, clamping plates are arranged on the adjusting components III, the clamping plates are used for clamping a guide pipe, the fixing component clamps the brazed sleeve, and a gap between the guide pipe and the brazed sleeve is adjusted through the adjusting components I, the adjusting components II and the adjusting components III.

Further, the fixed subassembly includes the connecting plate, and the fixed plate is all installed to the both sides of connecting plate, and slidable mounting has the centre gripping arm on the fixed plate, and the first end of centre gripping arm is used for centre gripping brazing formula sleeve pipe, and the second end of centre gripping arm is fixed to be equipped with the spring board, and the fixed spring that is equipped with between spring board and the fixed plate.

Further, the spring plate is fixedly provided with a lower mounting plate, the lower mounting plate is fixedly provided with an upper mounting plate, the adjusting component I comprises a worm wheel, the worm wheel is rotatably mounted between the lower mounting plate and the upper mounting plate, the upper mounting plate is rotatably provided with a worm, the worm is meshed with the worm wheel, and the clamping plate drives the guide pipe to rotate around the axis of the worm wheel by rotating the worm wheel.

Further, adjusting part II includes the sleeve, the inside spout that sets up of worm wheel, sleeve slidable mounting are in the worm wheel, and telescopic first end is fixed to be equipped with lead screw I, and telescopic second end articulates there is the connecting rod, the connecting rod with the upper end of grip block is articulated, rotatory being equipped with runner I between lower mounting panel and the last mounting panel, set up the screw in runner I and with I cooperation of lead screw.

Further, adjusting part III includes lead screw II, the inside slotted hole that sets up of sleeve, the sliding fit has short loop bar in the sleeve slotted hole, set up circular passageway in the lead screw I, lead screw II is at circular passageway internal rotation and removal, lead screw II and short loop bar fixed connection, short loop bar with the grip block lower extreme is articulated, rotatory runner II that is equipped with between lower mounting panel and the last mounting panel, II inside screw threads that set up of runner, II screw threads of runner and II cooperations of lead screw.

Furthermore, a moving assembly is arranged on one side of the vacuum furnace and comprises two slideways, the fixing assembly is arranged between the two slideways, and the moving assembly drives the fixing assembly to move into the vacuum furnace.

Further, be equipped with the support on the slide, be equipped with on the support and paint brazing filler metal subassembly, paint brazing filler metal subassembly and include the box, the rotatory carousel that is equipped with under the box, fixed being equipped with two slender poles on the carousel, slender pole downside slidable mounting has long loop bar, and the fixed shower nozzle that is equipped with of long loop bar downside, box, carousel, slender pole, long loop bar and shower nozzle form the route, and with brazing filler metal coating between pipe and brazing type sleeve pipe through the force pump, fixed being equipped with the electric jar on the carousel, the jar arm and the shower nozzle fixed connection of electric jar, the shower nozzle is the arc, and the inboard diameter of shower nozzle is greater than the pipe diameter, and the inboard diameter of shower nozzle is less than brazing type sleeve pipe upper end diameter, and when long loop bar and centre gripping arm contact, the shower nozzle covers the region that lies in centre gripping arm downside on the brazing type sleeve pipe completely.

Further, the vacuum furnace includes the furnace body, is provided with two slide rails in the furnace body, and width between two slide rails is the same with fixed subassembly, still sets up two heating rods in the furnace body, and the heating rod height is corresponding with brazing filler metal coating position, and width between two heating rods suits with the pipe, when fixed subassembly, adjusting part I, adjusting part II and III centre gripping pipes of adjusting part and brazing formula sleeve pipe to the slide rail on, the heating rod heats the position of brazing filler metal, is provided with the door on the furnace body.

Further, the movable assembly further comprises a motor II, the motor II is fixedly installed on the lower side of the slide way, a long lead screw is fixedly installed on a rotating shaft of the motor II, a clamping strip is arranged on the slide way, a push block is installed in the clamping strip in a sliding mode, a movable plate is fixedly installed on the lower side of the push block, the movable plate is matched with the long lead screw and drives the long lead screw to move, and the length of the push block is longer than the gap between the long lead screw and the slide rail.

Compared with the prior art, the invention has the beneficial effects that: (1) According to the method, the error of part installation is detected before welding, the defective part is found to be replaced in time, and the part white loss caused by the completion of welding is avoided; (2) The invention is sent into the vacuum furnace together with the clamp for welding, which can save one step compared with the pre-welding method, simplify the steps and improve the efficiency; (3) According to the welding equipment, the adjusting component I, the adjusting component II and the adjusting component III are arranged on the fixing component, after the adjusting component I, the adjusting component II and the adjusting component III are adjusted, the angles of the guide pipe and the brazing type sleeve are adjusted, even if repeated disassembly and assembly tests are carried out, the guide pipe and the brazing type sleeve are in an adjusted state after being clamped again, adjustment is not needed again, and the clamping efficiency is improved; (4) The adjusting component I can longitudinally and rotatably adjust the guide pipe, so that the gaps between the guide pipe and the brazing type sleeve are uniform in the longitudinal rotating dimension; (5) The adjusting assembly II can adjust the vertical rotation of the guide pipe, so that the gap between the guide pipe and the brazing type sleeve is uniform in the vertical rotation dimension; (6) The adjusting component III and the adjusting component II are matched to drive the guide pipe to move transversely, so that the radial gap between the guide pipe and the brazing type sleeve is uniform; (7) The invention is provided with two nozzles, which can move downwards from the upper side to coat solder on the guide pipe and the soldering type sleeve, and the arc shape of the nozzles ensures that no coating dead angle exists; (8) The heating rod heats the brazing position, so that the fixed assembly, the adjusting assembly I, the adjusting assembly II and the adjusting assembly III are less affected by heating, and parts are prevented from being damaged; (9) The length of the push block is longer than the gap between the long lead screw and the slide rail, so that the fixing plate can smoothly pass through the gap and completely reach the slide rail, and the door can be smoothly closed when the last group of fixing assemblies slide into the vacuum furnace.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is an overall structural view illustrating a solder coating process according to the present invention.

Fig. 3 is a schematic view of the overall structure of the solder coating of the present invention.

Fig. 4 is a schematic view of the piping connection assembly of the present invention.

Fig. 5 isbase:Sub>A cross-sectional view atbase:Sub>A-base:Sub>A in fig. 4.

FIG. 6 is a schematic view of a moving assembly of the present invention.

FIG. 7 is a schematic view of a securing assembly of the present invention.

FIG. 8 is a schematic view of the pipeline clamping connection assembly of the present invention with adjustment assembly I and adjustment assembly II.

Fig. 9 is a side view of the fixing assembly and three adjustment assemblies of the present invention.

Fig. 10 is a cross-sectional view taken at D-D in fig. 9.

Fig. 11 is an enlarged view of fig. 10 at a.

Fig. 12 is a schematic view of a stent and solder-smearing component of the present invention.

Fig. 13 is a side view of fig. 12.

Fig. 14 is a cross-sectional view at B-B in fig. 13.

Fig. 15 is a schematic view of a braze-applied assembly of the present invention.

Fig. 16 is a side view of fig. 15.

Fig. 17 is a cross-sectional view at C-C in fig. 16.

FIG. 18 is a schematic view of a vacuum furnace according to the present invention.

Reference numerals: 1-a pipeline connecting assembly; 2-a stationary component; 3-an adjustment component I; 4-adjusting the component II; 5-a regulating component III; 6-a scaffold; 7-coating a brazing filler metal component; 8-a moving assembly; 9-vacuum furnace; 10-a clamping plate; 11-a door; 12-a base plate; 13-a reinforcement plate; 14-a riser; 15-a sliding plate; 105-a cross slide; 101-a catheter; 102-brazed sleeves; 103-a cap nut; 104-flareless catheter hub; 201-a plugboard; 202-a connection plate; 203-spring plate; 204-a spring; 205-lower mounting plate; 206-upper mounting plate; 207-long rod; 208-a gripper arm; 209-fixing plate; 301-a worm gear; 302-a worm; 303-hand wheel; 401-screw I; 402-runner I; 403-a sleeve; 404-a connecting rod; 501-a screw II; 502-turning wheel ii; 503-short loop bar; 601-erecting a pole; 602-a diagonal rod; 603-a cross bar; 701-a handle; 702-a cover; 703-a box body; 704-a turntable; 705-thin rod; 706-electric cylinder; 707-long loop bar; 708-a spray head; 709-motor I; 710-a pinion gear; 711-toothed ring; 801-motor II; 802-moving plate; 803-a push block; 804-long lead screw; 805-engaging lugs; 806-a slide; 901-furnace body; 902-a slide rail; 903-heating rod; 904-groove.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Wherein the showings are for the purpose of illustration only and not for the purpose of limiting the same, the same is shown by way of illustration only and not in the form of limitation; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The first embodiment is as follows: a flareless pipeline connecting piece vacuum brazing method for an aircraft engine comprises the following steps.

The method comprises the following steps: the conduit 101, the brazed sleeve 102, the outer sleeve nut 103 and the flareless conduit fitting 104 are assembled together to form the conduit coupling assembly 1, and the conduit 101 and the brazed sleeve 102 are clamped stably to ensure uniform gaps between the conduit 101 and the brazed sleeve 102.

Step two: the angular, radial and axial deviations between the catheter 101 and the flareless catheter hub 104 were measured, with an angular deviation of no more than 2 ° and a radial deviation of no more than three tenths of a millimeter, with the axial direction being such that the tapered surface of the brazed sleeve 102 and the flareless catheter hub 104 were in contact and did not exert too much force.

Step three: after the detection result is qualified, the pipeline connecting assembly 1 is unclamped, the outer sleeve nut 103 and the flareless type conduit joint 104 are removed, and the conduit 101 and the brazed sleeve 102 are clamped together again; if the detection is unqualified, the detection is continued after the parts are replaced, the parts welded together can be ensured to be qualified by detecting before welding, and the material waste caused by detection after the welding is finished is avoided.

Step four: the positions to be welded between the pipe 101 and the brazed bushing 102 are coated with a brazing filler metal.

Step five: and (4) sending the molten solder into a vacuum furnace for welding, heating the position of the solder during welding, and filling the weld joint by the capillary principle after the solder is molten.

Example two: a vacuum brazing apparatus as shown in fig. 1-18 applied to a first embodiment of the present invention comprises a vacuum furnace 9, a moving assembly 8 is installed on one side of the vacuum furnace 9, a fixing assembly 2 is installed on the moving assembly 8, the fixing assembly 2 is used for clamping a brazing type sleeve 102, an adjusting assembly i 3 is installed in the fixing assembly 2, an adjusting assembly ii 4 is installed in the adjusting assembly i 3, an adjusting assembly iii 5 is installed in the adjusting assembly ii 4, a clamping plate 10 is installed on the adjusting assembly iii 5, the clamping plate 10 clamps and adjusts the angle of a conduit 101, the assembled conduit connecting assembly 1 is clamped and then detected, the angular deviation, the radial deviation and the axial deviation are detected, a casing nut 103 and a flawless conduit joint 104 are removed after the detection is qualified, the moving assembly 8 drives the fixing assembly 2 to the lower side of a brazing material assembly 7, brazing material is coated, and finally the moving assembly 8 sends the fixing assembly 2, the adjusting assembly i 3, the adjusting assembly ii 4, the adjusting assembly iii 5, the clamped conduit 101 and the brazing type sleeve 102 into the vacuum furnace 9 for vacuum brazing.

One side of vacuum furnace 9 is provided with bottom plate 12, bottom plate 12 first side and second side all weld two risers 14, use the bolt fastening to have reinforcing plate 13 between two risers 14 of homonymy, reinforcing plate 13 is used for consolidating riser 14, prevent riser 14 slope, be equipped with removal subassembly 8 through the bolt on two risers 14 of homonymy, removal subassembly 8 includes slide 806, slide 806 downside is fixed and is equipped with motor II 801 and engaging lug 805, the fixed long lead screw 804 that is equipped with in the pivot of motor II 801, long lead screw 804 and engaging lug 805 swivelling joint, set up the card strip on the slide 806, slidable mounting has ejector pad 803 in the card strip, the fixed movable plate 802 that is equipped with of downside of ejector pad 803, movable plate 802 and the cooperation of long lead screw 804, motor II 801 drive long lead screw 804 is rotatory, long lead screw 804 swivelling joint movable plate 802 and ejector pad 803 remove.

The fixing component 2 is further slidably mounted between the two sliding ways 806, the fixing component 2 comprises a connecting plate 202, fixing plates 209 are fixedly mounted on two sides of the connecting plate 202, a sliding plate 15 is further slidably mounted between the two fixing plates 209, a semicircular groove is formed in the middle of the sliding plate 15, a semicircular groove is also formed in the middle of the connecting plate 202, the two semicircular grooves are combined together to form a complete circle, the pipeline connecting component 1 is located in the circle after being clamped, clamping arms 208 are slidably mounted in the fixing plates 209, first ends of the two clamping arms 208 are arc-shaped plates and are used for clamping the pipeline connecting component 1, a spring plate 203 is fixedly mounted at a second end of each clamping arm 208, a spring 204 is sleeved on each clamping arm 208, a first end of the spring 204 is fixedly connected with the fixing plate 209, a second end of the spring 204 is fixedly connected with the spring plate 203, a lower mounting plate 205 is fixedly mounted on the spring plate 203 through bolts, a circular through hole is formed between the upper mounting plate 206 and the lower mounting plate 205, a side face of the spring plate 203 is fixedly mounted with a long rod 207, the long rod 207 is in contact with the fixing plates 209, one end of the long rod 207, the two plugging plates 201 are respectively located at positions far away from the spring plates 203 fixedly connected with the spring plates, when the vacuum pushing plates 203, the two plugging plates are close to the vacuum furnace, and the two plugging plates are moved to the vacuum pushing blocks 209, and the two plugging plates 209, and the vacuum furnace, and the two plugging plates are moved to be close to be moved to be close to the vacuum furnace, and to be moved to be released when the two pushing blocks 209, and the vacuum furnace are moved.

The adjusting assembly I3 comprises a worm wheel 301, a worm 302 and a hand wheel 303, the worm wheel 301 is rotatably installed in a circular through hole formed by the lower installing plate 205 and the upper installing plate 206, the worm 302 is rotatably installed on the upper installing plate 206, and the hand wheel 303 is fixedly installed at the top end of the worm 302; the adjusting assembly II 4 comprises a screw I401, a rotating wheel I402, a sleeve 403 and a connecting rod 404, a sliding groove is arranged in the worm wheel 301, the sliding groove is a rectangular sliding groove in the embodiment, the outer part of the sleeve 403 is rectangular in cross section, the sleeve 403 is slidably mounted in the rectangular sliding groove of the worm wheel 301, the rotating wheel I402 is rotatably mounted between the lower mounting plate 205 and the upper mounting plate 206, threads are arranged in the rotating wheel I402, the screw I401 is fixedly mounted at the first end of the sleeve 403, the screw I401 is matched with the rotating wheel I402, the screw I401 and the sleeve 403 can be driven to move by manually rotating the rotating wheel I402, the connecting rod 404 is hinged to the second end of the sleeve 403, and the connecting rod 404 is hinged to the upper end of the clamping plate 10; adjusting part III 5 includes lead screw II 501, II 502 of runner and short loop bar 503, also set up rectangular slot hole in the sleeve 403, short loop bar 503 slidable mounting is in the rectangular slot hole of sleeve 403, set up circular passageway in the lead screw I401, II 501 of lead screw and short loop bar 503 fixed connection, II 501 of lead screw can remove and rotate in circular passageway, rotatory II 502 of runner of being equipped with between lower mounting panel 205 and the last mounting panel 206, set up the screw in II 502 of runner, II 502 of runner and II 501 cooperation of lead screw, the one end of short loop bar 503 is articulated with the lower extreme of grip block 10, can drive grip block 10 vertical rotation through adjusting part I3, can drive grip block 10 vertical rotation through adjusting part II 4, can drive grip block 10 lateral shifting through adjusting part III 5.

Remove and be equipped with on the subassembly 8 through support 6 and paint brazing filler metal subassembly 7, support 6 includes pole setting 601, pole setting 601 passes through bolt fixed mounting on slide 806, the lower extreme of pole setting 601 sets up three connector, be triangle-shaped, the purpose makes the connection more firm, the top of pole setting 601 is equipped with horizontal pole 603 through bolt fastening, horizontal pole 603 and pole setting 601 are ninety degrees, be equipped with down tube 602 through bolt fastening between pole setting 601 and the horizontal pole 603, pole setting 601, form triangle-shaped between down tube 602 and the horizontal pole 603 in order to consolidate the support.

The brazing filler metal coating assembly 7 comprises a box body 703, the box body 703 is fixedly installed on a cross rod 603, a cover 702 is rotatably installed on the box body 703, a handle 701 is arranged on the cover 702, a motor I709 is fixedly installed on the side face of the box body 703 through a bolt, a pinion 710 is fixedly installed on a rotating shaft of the motor I709, a rotary disc 704 is rotatably installed at the lower end of the box body 703, a toothed ring 711 is fixedly installed on the outer side of the rotary disc 704, the toothed ring 711 is meshed with the pinion 710, two thin rods are fixedly installed on the lower side of the rotary disc 704, a long sleeve rod 707 is slidably installed on the lower side of the thin rod 705, a spray head 708 is fixedly installed at the lower end of the long sleeve rod 707, the box body 703, the rotary disc 704, the thin rods 705 and the long sleeve rod 707 form a channel with the interior of the spray head 708, an opening is formed in the spray head 708 for coating brazing filler metal, an electric cylinder 706 is fixedly installed on the rotary disc 704, a cylinder arm of the electric cylinder 706 is fixedly connected with the spray head 708, the electric cylinder arm 706 controls the spray head 708 to move up and down, the spray head 708 to rotate under the electric motor I709, the spray head 708 is in an arc shape, the inner side diameter of the spray head 708 is larger than the diameter of the guide pipe 101 and smaller than the diameter of the brazing sleeve 102, when the sleeve 208 is completely covered on the upper end of the brazing sleeve 102.

The vacuum furnace 9 comprises a furnace body 901, two slide rails 902 are arranged in the furnace body 901, the width between the two slide rails 902 is the same as that of the fixed assembly 2, two heating rods 903 are further arranged in the furnace body 901, the heights of the heating rods 903 correspond to the coating positions of brazing filler metal, the width between the two heating rods 903 is adaptive to the guide pipe 101, when the fixed assembly 2, the adjusting assembly I3, the adjusting assembly II 4 and the adjusting assembly III 5 clamp the guide pipe 101 and the brazing type sleeve 102 onto the slide rails 902, the brazing filler metal is heated by the heating rods 903, a door 11 is arranged on the furnace body 901, the gap between the slide rails 902 and the slide rails 806 is small and the length of a push block 803, the push block 803 can push the fixed assembly 2 to completely pass through the gap when the fixed assembly 2 is pushed, grooves 904 are arranged in the slide rails 902 and the furnace body 901, and the lower ends of the brazing type sleeve 102 are located in the grooves 904.

The working principle is as follows: firstly, assembling the conduit 101, the brazed sleeve 102, the outer nut 103 and the flareless conduit joint 104 together, sliding the sliding plate 15 away from the two fixing plates 209, pinching the two insertion plates 201 by hand, the insertion plates 201 driving the two spring plates 203 to move away from each other and simultaneously driving the two clamping arms 208 to move away from each other, at this time, the spring 204 is stretched, aligning the upper end surface of the brazed sleeve 102 with the upper ends of the clamping arms 208, gradually loosening the two insertion plates 201, clamping the brazed sleeve 102 by the two clamping arms 208 under the action of the spring 204, returning the sliding plate 15 to the original position, manually rotating the rotating wheel II 502 and the rotating wheel I402, rotating the rotating wheel II 502 to drive the screw II 501 to move, the screw II 501 drives the short sleeve rod 503 to move towards the conduit connection component 1, the short sleeve rod 503 slides in the sleeve 403 (the short sleeve rod 503 cannot rotate because the connection position is rectangular), the short sleeve rod 503 drives the two clamping plates 10 to approach each other, in order to match the movement of the clamping plates 10, the rotating wheel i 402 needs to be rotated simultaneously, the rotating wheel i 402 rotates to drive the screw rod i 401 and the sleeve 403 to move towards the direction of the pipeline connecting assembly 1, the sleeve 403 slides in the worm wheel 301 (the sleeve 403 does not rotate because the worm wheel 301 is also a rectangular sliding hole), so the two clamping plates 10 can gradually contact the conduit 101 at this time, the posture of the conduit 101 needs to be adjusted in order to ensure the uniform gap between the conduit 101 and the brazed sleeve 102, the rotating wheel i 402 can be rotated continuously at this time, under the condition that the adjusting assembly iii 5 is not moved, the rotating wheel i 402 drives the sleeve 403 to move back and forth, so that the clamping plates 10 rotate around the short sleeve rod 503 for adjustment, the hand wheel 303 can also be rotated, the hand wheel 303 drives the worm 302 to rotate, and the worm 302 drives the worm wheel 301 to rotate, since the sleeve 403 is slidably installed in the worm wheel 301, and the short sleeve rod 503 is slidably installed in the sleeve 403, and relative rotation cannot be generated, the connecting rod 404 and the short sleeve rod 503 can also rotate synchronously, that is, the connecting rod 404 and the short sleeve rod 503 drive the clamping plate 10 to rotate, so as to perform adjustment, and the adjustment is repeated until the gap between the conduit 101 and the brazed sleeve 102 is uniform.

At this time, a measuring tool is used for detecting the angular deviation, the axial deviation and the radial deviation between the conduit 101 and the flareless conduit joint 104, the two plug boards 201 are pinched by hands to approach each other after the detection is qualified, at this time, the two clamping boards 10 and the two clamping arms 208 simultaneously loosen the conduit 101 and the brazed sleeve 102, the pipeline connecting component 1 is taken down, and the outer sleeve nut 103 and the flareless conduit joint 104 are removed; if the detection is not qualified, the outer sleeve nut 103 or the flareless type conduit joint 104 is replaced, the deviation between the conduit 101 and the flareless type conduit joint 104 is detected, so that the deviation is eliminated by replacing the outer sleeve nut 103 and the flareless type conduit joint 104 (production errors are more prone to occur on the inclined surface of the outer sleeve nut 103), the detection is continued after parts are replaced, finally, the parts are clamped again after the parts are qualified, the motor II 801 is started, the motor II 801 drives the long lead screw 804 to rotate, the long lead screw 804 rotates to drive the moving plate 802 and the push block 803 to slide on the slide way 806, the push block 803 moves to push the fixing plate 209 to move, the fixing assembly 2 is pushed to the position under the brazing filler metal coating assembly 7, the conduit 101 corresponds to the spray head 708, the motor I709 is started, the motor I709 drives the pinion 710 to rotate, the pinion 710 drives the toothed ring 711 to rotate, the toothed ring 711 drives the rotary table 704 to rotate, the rotary table 704 drives the two spray heads 708 to rotate through the thin rod 705 and the long sleeve rod 707, so that the two spray heads 708 are not located on the upper sides of the two clamping arms 208, the electric cylinder 706 is started, the brazing filler metal cylinder 706, the brazing filler metal cylinder arm 706 drives the spray head 708 to move downwards, the brazing filler metal coating pump 102 to contact with the uppermost end of the box 703, and the pressure box 703. Solder is injected into the rotary disc 704, flows to the thin rod 705 from the rotary disc 704, flows into the long sleeve rod 707 along the thin rod 705, is coated at a gap between the brazed sleeve 102 and the guide pipe 101 from the spray head 708, then the motor I709 is continuously started, the motor I709 drives the two spray heads 708 to rotate, when the long sleeve rod 707 touches the clamping arm 208, the motor I709 rotates reversely, when the same long sleeve rod 707 touches the other clamping arm 208, the motor I709 stops rotating reversely, the pressure pump stops working, the spray heads 708 rotate reversely continuously, and when the two spray heads 708 are not located at the lower side of the clamping arm 208, the electric cylinder 706 retracts to retract the spray heads 708.

Opening the door 11 to enable the door not to block the furnace body 901 any more, starting the motor II 801 to drive the push block 803 to move, enabling the push block 803 to continue to drive the fixing assembly 2 to move, enabling the front end of the fixing plate 209 to slide onto the sliding rail 902 after leaving the sliding rail 806, enabling the push block 803 to continue to push the fixing plate 209 until the sliding rail 902 completely slides onto the sliding rail 902 after the rear end of the fixing plate 209 leaves the sliding rail 806, filling another set of fixing assembly 2, an adjusting assembly I3, an adjusting assembly II 4 and an adjusting assembly III 5 onto the moving assembly 8, continuing to detect and coat the brazing filler metal on other pipeline connecting assemblies 1, then similarly conveying the other pipeline connecting assemblies 1 into the vacuum furnace 9, pushing the fixing assembly 2 in the vacuum furnace 9 into the vacuum furnace 9, closing the door 11 after the vacuum furnace 9 is filled, starting the sliding rail 902, enabling the sliding rail 902 to heat the brazing filler metal between the guide pipe 101 and the brazing type sleeve 102, enabling the molten brazing filler metal to enter gaps through a capillary principle, and then cooling to finish welding.

Claims

1. A vacuum brazing device used in a flareless pipeline connecting piece vacuum brazing method for an aircraft engine comprises a fixing component (2) and a vacuum furnace (9), wherein adjusting components I (3) are arranged on two sides of the fixing component (2), adjusting components II (4) are arranged in the adjusting components I (3), adjusting components III (5) are arranged in the adjusting components II (4), a clamping plate (10) is arranged on the adjusting components III (5), the clamping plate (10) is used for clamping a guide pipe (101), the fixing component (2) clamps a brazing type sleeve (102), a gap between the guide pipe (101) and the brazing type sleeve (102) is adjusted through the adjusting components I (3), the adjusting components II (4) and the adjusting components III (5), a moving component (8) is arranged on one side of the vacuum furnace (9), and the moving component (8) fixes the component (2) and drives the fixing component (2) to enter the vacuum furnace;

the fixing assembly (2) comprises a connecting plate (202), fixing plates (209) are mounted on two sides of the connecting plate (202), a clamping arm (208) is mounted on each fixing plate (209) in a sliding mode, a first end of each clamping arm (208) is used for clamping the brazing type sleeve (102), a spring plate (203) is fixedly mounted at a second end of each clamping arm (208), and a spring (204) is fixedly mounted between each spring plate (203) and each fixing plate (209);

a lower mounting plate (205) is fixedly mounted on the spring plate (203), an upper mounting plate (206) is fixedly mounted on the lower mounting plate (205), the adjusting assembly I (3) comprises a worm wheel (301), the worm wheel (301) is rotatably mounted between the lower mounting plate (205) and the upper mounting plate (206), a worm (302) is rotatably mounted on the upper mounting plate (206), the worm (302) is meshed with the worm wheel (301), and the clamping plate (10) drives the guide pipe (101) to rotate around the axis of the worm wheel (301) by rotating the worm wheel (301);

the adjusting assembly II (4) comprises a sleeve (403), a sliding groove is formed in the worm wheel (301), the sleeve (403) is slidably mounted in the worm wheel (301), a lead screw I (401) is fixedly mounted at the first end of the sleeve (403), a connecting rod (404) is hinged to the second end of the sleeve (403), the connecting rod (404) is hinged to the upper end of the clamping plate (10), a rotating wheel I (402) is rotatably mounted between the lower mounting plate (205) and the upper mounting plate (206), and a thread is formed in the rotating wheel I (402) and is matched with the lead screw I (401);

the adjusting assembly III (5) comprises a screw II (501), a slotted hole is formed in the sleeve (403), a short sleeve rod (503) is arranged in the slotted hole of the sleeve (403) in a sliding mode, a circular channel is formed in the screw I (401), the screw II (501) rotates and moves in the circular channel, the screw II (501) is fixedly connected with the short sleeve rod (503), the short sleeve rod (503) is hinged to the lower end of the clamping plate (10), a rotating wheel II (502) is rotatably arranged between the lower mounting plate (205) and the upper mounting plate (206), threads are formed in the rotating wheel II (502), and the threads of the rotating wheel II (502) are matched with the screw II (501);

the vacuum brazing method comprises the following steps:

the method comprises the following steps: the pipe (101), the brazed type sleeve (102), the outer sleeve nut (103) and the flareless type pipe joint (104) are installed together to form a pipeline connecting assembly (1), the pipe (101) and the brazed type sleeve (102) are clamped stably, and the uniform gap between the pipe (101) and the brazed type sleeve (102) is ensured;

step two: detecting angular, radial and axial deviations between the catheter (101) and the flareless catheter hub (104);

step three: after the detection result is qualified, the pipeline connecting assembly (1) is unclamped, the outer sleeve nut (103) and the flareless type conduit joint (104) are removed, and the conduit (101) and the brazed sleeve (102) are clamped together again; if the detection is unqualified, the detection is continued after the outer sleeve nut (103) is replaced;

step four: coating solder on a position to be welded between the guide pipe (101) and the soldering type sleeve (102);

step five: and (5) conveying the mixture into a vacuum furnace for welding.

2. A vacuum brazing apparatus according to claim 1, wherein said moving assembly (8) comprises two runners (806), said fixed assembly (2) being mounted between the two runners (806).

3. The vacuum brazing equipment as claimed in claim 2, wherein a support (6) is mounted on the sliding way (806), a brazing filler metal component (7) is mounted on the support (6), the brazing filler metal component (7) comprises a box body (703), a rotary disc (704) is rotatably mounted below the box body (703), two thin rods (705) are fixedly mounted on the rotary disc (704), a long loop rod (707) is slidably mounted on the lower side of each thin rod (705), a spray head (708) is fixedly mounted on the lower side of each long loop rod (707), the box body (703), the rotary disc (704), the thin rods (705), the long loop rods (707) and the spray head (708) form a passage, brazing filler metal is coated between the guide pipe (101) and the brazed type sleeve (102) through a pressure pump, an electric cylinder (706) is fixedly mounted on the rotary disc (704), a cylinder arm of the electric cylinder (706) is fixedly connected with the spray head (708), the spray head (708) is arc-shaped, the diameter of the inner side of the spray head (708) is larger than the diameter of the guide pipe (101), the diameter of the inner side of the brazed type sleeve (102) is smaller than that of the upper end of the brazed type sleeve (208), and the upper clamping area of the spray head (708) are completely covered by the clamping arm (208).

4. A vacuum brazing apparatus according to claim 3, wherein the vacuum furnace (9) comprises a furnace body (901), two slide rails (902) are arranged in the furnace body (901), the width between the two slide rails (902) is the same as that of the fixed component (2), two heating rods (903) are further arranged in the furnace body (901), the height of each heating rod (903) corresponds to the brazing filler metal coating position, the width between the two heating rods (903) is adapted to the guide pipe (101), when the fixed component (2), the adjusting component i (3), the adjusting component ii (4) and the adjusting component iii (5) clamp the guide pipe (101) and the brazing type sleeve (102) onto the slide rails (902), the positions of the brazing filler metal are heated by the heating rods (903), and a door (11) is arranged on the furnace body (901).

5. The vacuum brazing equipment according to claim 4, wherein the moving assembly (8) further comprises a motor II (801), the motor II (801) is fixedly installed on the lower side of the slide rail (806), a long lead screw (804) is fixedly installed on a rotating shaft of the motor II (801), a clamping strip is arranged on the slide rail (806), a pushing block (803) is installed in the clamping strip in a sliding mode, a moving plate (802) is fixedly installed on the lower side of the pushing block (803), the moving plate (802) is matched with the long lead screw (804) and drives the long lead screw (804) to move, and the length of the pushing block (803) is longer than the gap between the long lead screw (804) and the slide rail (902).