CN116237612A - Paste solder coating tool and soldering method for high-pressure turbine outer ring assembly - Google Patents
Paste solder coating tool and soldering method for high-pressure turbine outer ring assembly Download PDFInfo
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- CN116237612A CN116237612A CN202310476419.3A CN202310476419A CN116237612A CN 116237612 A CN116237612 A CN 116237612A CN 202310476419 A CN202310476419 A CN 202310476419A CN 116237612 A CN116237612 A CN 116237612A
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- outer ring
- pressure turbine
- ring assembly
- turbine outer
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- 238000000576 coating method Methods 0.000 title claims abstract description 122
- 239000011248 coating agent Substances 0.000 title claims abstract description 115
- 229910000679 solder Inorganic materials 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000005476 soldering Methods 0.000 title description 3
- 238000005219 brazing Methods 0.000 claims abstract description 114
- 229910052751 metal Inorganic materials 0.000 claims abstract description 66
- 239000002184 metal Substances 0.000 claims abstract description 66
- 239000000945 filler Substances 0.000 claims abstract description 65
- 239000002981 blocking agent Substances 0.000 claims abstract description 23
- 238000003466 welding Methods 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 6
- 239000011148 porous material Substances 0.000 claims description 13
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000004146 energy storage Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000005498 polishing Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- 238000010998 test method Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 244000137852 Petrea volubilis Species 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 229920001342 Bakelite® Polymers 0.000 claims description 4
- 239000004637 bakelite Substances 0.000 claims description 4
- 238000007598 dipping method Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000009991 scouring Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 239000003112 inhibitor Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000002347 injection Methods 0.000 description 25
- 239000007924 injection Substances 0.000 description 25
- 230000000712 assembly Effects 0.000 description 8
- 238000000429 assembly Methods 0.000 description 8
- 238000004321 preservation Methods 0.000 description 5
- 238000012937 correction Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0018—Brazing of turbine parts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention belongs to the field of welding, and discloses a paste solder coating and injecting tool and a brazing method for a high-pressure turbine outer ring assembly, wherein the paste solder coating and injecting tool comprises a tool plate; the bottom of the jig plate is provided with a bottom backing plate, and the side wall of the bottom backing plate is provided with a plurality of stop blocks; a plurality of supporting blocks are arranged on the end face of one end of the bottom backing plate, which is close to the jig plate; the top of tool board sets up a plurality of bosss that are used for installing and spacing high-pressure turbine outer loop subassembly, and processing is used for preventing the wrong step of direction of putting of high-pressure turbine outer loop subassembly on the boss. The brazing method comprises the steps of assembling the high-pressure turbine outer ring assembly on a paste brazing filler metal coating and injecting tool of the high-pressure turbine outer ring assembly, and coating and injecting the paste brazing filler metal through a brazing filler metal automatic coating and injecting machine; and (3) coating a flow blocking agent on the coated high-pressure turbine outer ring assembly, and then carrying out vacuum brazing. The problem of manual operation's uniformity, repeatability are relatively poor is effectively solved, when guaranteeing welding quality, production efficiency has been improved, manufacturing cost has been reduced.
Description
Technical Field
The invention belongs to the field of welding, and relates to a paste solder coating tool and a soldering method for a high-pressure turbine outer ring assembly.
Background
Currently, high pressure turbine outer ring assemblies for aircraft engines typically employ a vacuum brazing process to weld an orifice plate to an outer ring block. The outer ring block of the high-pressure turbine is a machining forming part, the pore plate is a thin-wall sheet metal stamping part, the gap difference to be welded on the whole circumferential weld joint of the pore plate and the outer ring block is large, and the assembly and positioning consistency of the pore plate and the outer ring block is difficult to be strictly ensured. And a plurality of densely distributed air film holes are processed on the pore plate and the outer ring block, and the air film holes are not blocked by the brazing filler metal in the welding process. Therefore, the control of the amount of solder is particularly important in vacuum brazing the orifice plate. When the amount of the brazing filler metal is excessive, the brazing filler metal in a narrow space is extremely easy to overflow and spread into the air film holes; too small an amount of solder is detrimental to the formation of a complete and effective solder joint.
The existing vacuum brazing process is dependent on manual operation for a long time. The operator firstly prepares the powdered brazing filler metal into paste brazing filler metal by using a binder according to a certain proportion, and then the prepared paste brazing filler metal is poured into a medical nylon injector. The operator clamps the injector by hand and pushes the piston in the injector to extrude the brazing filler metal by means of hand force. The force of the operator to squeeze the brazing filler metal by hand and the speed of controlling the movement of the injector jointly determine the amount of the brazing filler metal to be coated and injected, and the amount of the brazing filler metal to be coated and injected is automatically adjusted by the operator according to the processing experience of the operator, so that the brazing filler metal is difficult to accurately and quantitatively control, and the coating consistency and the repeatability are poor. On the other hand, the efficiency of manually coating and filling solder is very low in terms of processing efficiency, and the requirement of mass part production cannot be met.
Disclosure of Invention
The invention aims to overcome the defects of poor brazing quality, low production efficiency and high production cost of the outer ring component of the high-pressure turbine in the prior art, and provides a paste brazing filler metal coating tool and a brazing method of the outer ring component of the high-pressure turbine.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
the invention provides a paste solder coating tool for a high-pressure turbine outer ring assembly, which comprises a tool plate; the bottom of the jig plate is provided with a bottom backing plate, and the side wall of the bottom backing plate is provided with a plurality of stop blocks; a plurality of supporting blocks are arranged on the end face of one end of the bottom backing plate, which is close to the jig plate; the top of tool board sets up a plurality of bosss that are used for installing and spacing high-pressure turbine outer loop subassembly, and processing is used for preventing the wrong step of direction of putting of high-pressure turbine outer loop subassembly on the boss.
Optionally, the jig plate and the stop block are made of bakelite, and the bottom pad plate and the supporting block are made of aluminum alloy; the jig plate is connected with the bottom pad plate and the bottom pad plate is connected with the supporting block by bolts; the stop block is provided with a fixing hole which is used for being connected with a screw of the equipment working platform.
In a second aspect of the present invention, there is provided a method of brazing a high pressure turbine outer ring assembly, comprising:
assembling the high-pressure turbine outer ring assembly on the paste solder coating tool of the high-pressure turbine outer ring assembly according to claim 1 or 2, and fixing the paste solder coating tool of the high-pressure turbine outer ring assembly on an equipment working platform of a solder automatic coating machine;
setting coating process parameters, and coating and injecting paste solder by a solder automatic coating and injecting machine;
and (3) coating a flow blocking agent in all small holes on a pore plate of the coated high-pressure turbine outer ring assembly and on the positions, close to the pasty brazing filler metal, on the outer ring block, and then carrying out vacuum brazing on the high-pressure turbine outer ring assembly.
Optionally, the setting the coating process parameters includes: and according to the size of the space to be brazed of the high-pressure turbine outer ring assembly, debugging the automatic brazing filler metal coating and injecting machine by adopting a test plate weighing test method, and obtaining and setting coating and injecting technological parameters of the high-pressure turbine outer ring assembly.
Optionally, when the high-pressure turbine outer ring assembly is assembled on the paste brazing filler metal coating tool of the high-pressure turbine outer ring assembly according to claim 1 or 2, an energy storage spot welding mode is adopted to assemble and position a pore plate of the high-pressure turbine outer ring assembly on an outer ring block of the high-pressure turbine outer ring assembly, the energy storage spot welding energy is 60J, and a brazing gap to be welded of the high-pressure turbine outer ring assembly after assembly is smaller than 0.1mm; when the paste solder is coated and injected by the solder automatic coating and injecting machine, a double mark point is adopted to determine a search object and a search area on the high-pressure turbine outer ring component; wherein, the similarity of the double mark points is set to 75%, the angle deviation is set to +/-1 DEG, and the setting ratio is 0.035 mm/pixel.
Optionally, when the paste solder is coated and injected by the solder automatic coating and injection machine, the air pressure used for coating and injection is 60KPa, and the coating and injection speed is 10mm/ms.
Optionally, the paste solder is obtained by uniformly stirring powdery HBNi82CrSiB solder and a binder.
Optionally, when the high-pressure turbine outer ring assembly is subjected to vacuum brazing, the brazing temperature is 1020 ℃, and the heat preservation time is 7-13 min.
Optionally, the injecting the flow blocking agent in all small holes on the orifice plate of the outer ring assembly of the high-pressure turbine after being injected and at the positions on the outer ring block close to the paste brazing filler metal injection comprises: coating all small holes on the pore plate of the high-pressure turbine outer ring assembly after coating with Al 2 O 3 White choking agent prepared by micro powder; and red blocking agent with the brand of NICROBRAZ is coated on the outer ring block at a position close to the position where the paste brazing filler metal is coated.
Optionally, the method further comprises: blowing off the white choked flow agent on the vacuum brazed high-pressure turbine outer ring component by using compressed air, dipping the red choked flow agent into acetone by using a hairbrush to remove the white choked flow agent, and cleaning residual marks of the white choked flow agent or residual marks of the red choked flow agent by using sand paper or scouring pad; the splashed, overflowed or piled solder is removed by mechanical polishing.
Compared with the prior art, the invention has the following beneficial effects:
according to the paste brazing filler metal coating tool for the high-pressure turbine outer ring assembly, the high-pressure turbine outer ring assembly with the well-positioned pore plate assembled is placed on the top boss of the jig plate, a plurality of high-pressure turbine outer ring assemblies can be placed on each tool, the boss is processed to limit left and right movement of the high-pressure turbine outer ring assembly, and meanwhile, the boss and the groove formed on the surface of the jig plate are convenient for taking and placing the high-pressure turbine outer ring assembly. By combining the structure of the outer ring component of the high-pressure turbine, the step is machined on the boss, and further, the error in placing direction of the outer ring component of the high-pressure turbine can be effectively prevented. Through the paste solder coating tool for the high-pressure turbine outer ring assembly, paste solder coating of a plurality of high-pressure turbine outer ring assemblies is realized, and coating and welding quality is ensured.
According to the brazing method for the high-pressure turbine outer ring assembly, uniform paste brazing filler metal coating and injection of a plurality of high-pressure turbine outer ring assemblies is achieved through the paste brazing filler metal coating and injection tool for the high-pressure turbine outer ring assembly, meanwhile, paste brazing filler metal coating and injection is conducted on the basis of an automatic brazing filler metal coating and injection machine, automatic paste brazing filler metal coating and injection is achieved, the problems of poor consistency and repeatability of manual operation are effectively solved, welding quality is guaranteed, meanwhile, production efficiency is improved, production cost is reduced, and the brazing filler metal coating and injection method has a large engineering application reference value for machining and manufacturing of similar parts.
Furthermore, according to the size of the space to be brazed of the high-pressure turbine outer ring assembly, a test plate weighing test method is adopted to debug the automatic brazing filler metal coating machine, coating process parameters of the high-pressure turbine outer ring assembly are obtained and set, the optimal solution of the amount of powdery brazing filler metal required by brazing of the high-pressure turbine outer ring assembly is found, automatic correction of assembly deviation during paste brazing filler metal coating is realized by adopting double mark points, and stable, efficient and reliable execution of automatic coating is realized.
Drawings
FIG. 1 is a schematic view of a high pressure turbine outer ring assembly according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a paste solder coating tool for an outer ring assembly of a high-pressure turbine according to an embodiment of the invention.
Fig. 3 is a schematic structural view of a base plate, a supporting block and a stopper according to an embodiment of the present invention.
Fig. 4 is an assembly state schematic diagram of a paste solder coating tool for an outer ring assembly of a high-pressure turbine according to an embodiment of the invention.
FIG. 5 is a flow chart of a method of brazing a high pressure turbine outer ring assembly in accordance with an embodiment of the present invention.
Wherein: 1-an outer ring block; 2-well plate; 3-a jig plate; 4-a base plate; 5-supporting blocks; 6-a stop block; 7-high pressure turbine outer ring assembly.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1 to 4, in one embodiment of the present invention, a paste solder coating tool for a high-pressure turbine outer ring assembly is provided, including a tool plate 3; the bottom of the jig plate 3 is provided with a bottom pad plate 4, and the side wall of the bottom pad plate 4 is provided with a plurality of stop blocks 6; a plurality of supporting blocks 5 are arranged on the end face of one end of the bottom backing plate 4, which is close to the jig plate 3; the top of the jig plate 3 is provided with a plurality of bosses for installing and limiting the high-pressure turbine outer ring assembly 7, and steps for preventing the high-pressure turbine outer ring assembly 7 from being placed in wrong directions are machined on the bosses.
In one possible implementation, the jig plate 3 and the stop block 6 are made of bakelite, and the bottom pad plate 4 and the supporting block 5 are made of aluminum alloy; the jig plate 3 and the bottom pad plate 4 are connected with each other through bolts, and the bottom pad plate 4 and the supporting block 5 are connected with each other through bolts; the stop block 6 is provided with a fixing hole for being connected with a screw of the working platform of the equipment.
In summary, according to the paste brazing filler metal coating tool for the high-pressure turbine outer ring assembly, the high-pressure turbine outer ring assembly 7 with the well-positioned orifice plate 2 is placed on the top boss of the jig plate 3, a plurality of high-pressure turbine outer ring assemblies 7 can be placed on each tool, the boss is processed to limit left and right movement of the high-pressure turbine outer ring assembly 7, and meanwhile, the boss and the groove formed on the surface of the jig plate 3 are convenient for taking and placing the high-pressure turbine outer ring assembly 7. By combining the structure of the high-pressure turbine outer ring assembly 7, steps are machined on the boss, and further, the error in placing direction of the high-pressure turbine outer ring assembly 7 can be effectively prevented. Through the paste solder coating tool for the high-pressure turbine outer ring assembly, paste solder coating of a plurality of high-pressure turbine outer ring assemblies 7 is realized, and coating and welding quality is ensured.
Referring to fig. 5, in still another embodiment of the present invention, in order to guarantee production and delivery of an aeroengine, solve the problem that the prior art cannot meet the production requirement of a certain type of high-pressure turbine outer ring assembly 7, in order to accurately control the amount of brazing filler metal, guarantee welding quality and prevent the brazing filler metal from overflowing to block the air film hole, and simultaneously improve production efficiency and reduce production cost, a brazing method for the high-pressure turbine outer ring assembly is provided.
Specifically, the brazing method of the high-pressure turbine outer ring assembly comprises the following steps:
s1: and assembling the high-pressure turbine outer ring assembly 7 on a paste solder coating tool of the high-pressure turbine outer ring assembly, and fixing the paste solder coating tool of the high-pressure turbine outer ring assembly on an equipment working platform of an automatic solder coating machine.
S2: setting coating process parameters, and coating and injecting the paste solder by a solder automatic coating and injecting machine.
S3: and (3) coating a flow blocking agent in all small holes on the orifice plate 2 of the coated high-pressure turbine outer ring assembly 7 and at the position, close to the paste solder coating, on the outer ring block 1, and then carrying out vacuum brazing on the high-pressure turbine outer ring assembly 7.
According to the brazing method for the high-pressure turbine outer ring assembly, uniform paste brazing filler metal coating and injection of the plurality of high-pressure turbine outer ring assemblies 7 is achieved through the paste brazing filler metal coating and injection tool for the high-pressure turbine outer ring assembly, meanwhile, paste brazing filler metal is coated and injected based on an automatic brazing filler metal coating and injection machine, automatic paste brazing filler metal coating and injection is achieved, the problems of poor consistency and repeatability of manual operation are effectively solved, welding quality is guaranteed, meanwhile, production efficiency is improved, production cost is reduced, and the brazing filler metal coating and injection method has a large engineering application reference value for processing and manufacturing of similar parts.
In one possible embodiment, the setting the coating process parameters includes: and according to the size of the space to be brazed of the high-pressure turbine outer ring assembly 7, debugging the automatic brazing filler metal coating and injecting machine by adopting a test plate weighing test method, and obtaining and setting coating and injecting technological parameters of the high-pressure turbine outer ring assembly 7.
Optionally, when the high-pressure turbine outer ring assembly 7 is assembled on the paste brazing filler metal coating tool of the high-pressure turbine outer ring assembly, the orifice plate 2 of the high-pressure turbine outer ring assembly 7 is assembled and positioned on the outer ring block 1 of the high-pressure turbine outer ring assembly 7 in an energy storage spot welding mode, the energy of the energy storage spot welding is 60J, and the gap between the brazing filler metal to be welded of the high-pressure turbine outer ring assembly 7 after assembly is smaller than 0.1mm; when the paste solder is coated and injected by the solder automatic coating and injecting machine, a double mark point is adopted to determine a search object and a search area on the high-pressure turbine outer ring assembly 7; wherein, the similarity of the double mark points is set to 75%, the angle deviation is set to +/-1 DEG, and the setting ratio is 0.035 mm/pixel.
Optionally, when the paste solder is coated and injected by the solder automatic coating and injection machine, the air pressure used for coating and injection is 60KPa, and the coating and injection speed is 10mm/ms.
Optionally, the paste solder is obtained by uniformly stirring powdery HBNi82CrSiB solder and a binder.
Optionally, when the high-pressure turbine outer ring assembly 7 is subjected to vacuum brazing, the brazing temperature is 1020 ℃, and the heat preservation time is 7-13 min.
Optionally, the injecting the blocking agent in all the small holes on the orifice plate 2 of the high-pressure turbine outer ring assembly 7 after the injection and the position on the outer ring block 1 near the paste solder injection comprises: the coating of all small holes on the pore plate 2 of the high-pressure turbine outer ring assembly 7 after coating is carried out by Al 2 O 3 White choking agent prepared by micro powder; the red blocking agent with the brand of NICROBRAZ is coated on the outer ring block 1 at a position close to the position where the paste solder is coated.
In one possible embodiment, cleaning of the flow inhibitor and residual braze is also required for the vacuum brazed high pressure turbine outer ring assembly 7. Specifically, blowing off the white flow blocking agent on the high-pressure turbine outer ring assembly 7 after vacuum brazing by using compressed air, dipping the red flow blocking agent into acetone by using a hairbrush to remove the white flow blocking agent, and cleaning residual marks of the white flow blocking agent or residual marks of the red flow blocking agent by using sand paper or scouring pad; the splashed, overflowed or piled solder is removed by mechanical polishing.
In one possible embodiment, the high pressure turbine outer ring assembly brazing method comprises the following detailed steps:
The method can be concretely carried out by the following steps:
step 4.1, placing parts: and placing the high-pressure turbine outer ring assembly 7 with the well-positioned pore plate 2 into a paste solder coating tool of the high-pressure turbine outer ring assembly. In the embodiment, 1 paste solder coating tool for the outer ring assembly of the high-pressure turbine can be placed on each working platform, and 25 parts can be placed on each paste solder coating tool for the outer ring assembly of the high-pressure turbine. Taking a plane on the jig plate 3, which is in contact with the bottom surface of the high-pressure turbine outer ring assembly 7, as a reference, a boss is processed on the jig plate 3 and is used for limiting left-right movement of the high-pressure turbine outer ring assembly 7; and grooves are formed, so that the high-pressure turbine outer ring assembly 7 can be conveniently taken and placed. In combination with the structure of the high-pressure turbine outer ring assembly 7, the jig plate 3 is further provided with a step for preventing the error in the placement direction of the high-pressure turbine outer ring assembly 7.
Step 4.2, placing a whole disc of the high-pressure turbine outer ring assembly and a paste solder coating tool of the high-pressure turbine outer ring assembly: and placing the paste solder coating tool of the high-pressure turbine outer ring assembly on an equipment working platform, and limiting the periphery by adopting a stop block 6. The paste brazing filler metal coating tool for the high-pressure turbine outer ring assembly consists of a jig plate 3, a bottom pad plate 4, a supporting block 5 and a stop block 6. The jig plate 3 and the stop block 6 are made of bakelite, and the bottom pad plate 4 and the supporting block 5 are made of aluminum alloy. The jig plate 3 is connected with the bottom pad plate 4, the bottom pad plate 4 is connected with the supporting block 5, and the stop block 6 is connected with the equipment working platform by bolts.
Step 4.3, preparing paste solder: the powdered HBNi82CrSiB brazing filler metal and the binder are mixed according to a certain mass percentage and uniformly stirred, and then are put into a special cylinder for equipment and fixed stably. And a needle is arranged and connected with compressed air. It should be noted that the certain mass percentage is the optimal preparation proportion of the required powdered brazing filler metal amount of the high-pressure turbine outer ring assembly 7 determined by adopting a test plate weighing test method in the early stage and utilizing an automatic brazing filler metal coating machine to debug in combination with the size of the space to be brazed of the high-pressure turbine outer ring assembly 7.
The test board weighing test method specifically comprises the steps of coating and injecting paste brazing filler metal and vacuum brazing by taking a test board as a target under the same coating and injection process parameters, so as to obtain the ratio of the amount of powdered brazing filler metal in the paste brazing filler metal used under the optimal welding quality in the actual vacuum brazing process.
Step 4.4, image recognition: based on the image recognition function, the type of the marking points is set as double marking points according to the structural characteristics of the high-pressure turbine outer ring assembly 7, a plurality of products are shot for many times, and then coordinates of the marking points are edited to clearly determine the search objects and the search areas on the high-pressure turbine outer ring assembly 7. Before searching, the similarity of the two mark points was set to 75%, the angular deviation was set to ±1°, and the setting ratio was 0.035 mm/pixel for correcting the correction accuracy of the CCD camera for the search object/region.
Step 4.5, programming the coating and injection path: and fitting the geometric outline of the position of the solder joint to be welded by means of the image acquired by the CCD camera and the inserting point drawing line, so as to complete the programming of the paste solder coating and injecting path.
Step 4.6, setting the parameters of the coating and injection process: specific process parameters for paste solder coating are set, including but not limited to setting the air pressure for coating to be 60KPa, setting the coating speed to be 10mm/ms, and the like.
Step 4.7, automatic coating: clicking a start button, running a program, and automatically coating the equipment until the machine automatically resets after all parts on the working platform are coated.
Step 4.8, running a fixed program to repeatedly coat and annotate: taking out the high-pressure turbine outer ring assembly 7 of which the whole disc is coated with the paste solder, and transferring the whole disc into a process of coating and injecting a flow blocking agent; and placing the new assembled and positioned whole disc high-pressure turbine outer ring assembly 7 on an equipment working platform, and preparing for automatic paste solder coating and injection. All the high-pressure turbine outer ring assemblies 7 processed in the batch are completely coated by running a fixing program of automatic coating and injection of the brazing filler metal.
Step 8, checking: and carrying out visual inspection on the brazing quality according to the acceptance standard of the vacuum brazing process.
Therefore, the brazing method of the high-pressure turbine outer ring assembly introduces the thought, method and equipment for automatically coating and injecting the brazing filler metal, utilizes the automatic coating and injecting machine for debugging coating and injecting parameters of the brazing filler metal, finds the optimal solution of the amount of powdered brazing filler metal required by brazing, can display the discharge amount digitally in real time, and controls the precision to be +/-10%; the CCD camera is adopted, and based on the image recognition principle, the automatic correction of assembly deviation is realized when the solder is coated and injected, the positioning precision is less than 0.025mm, and the repeated positioning precision is less than 0.02mm; the special paste solder coating tool for the outer ring assembly of the high-pressure turbine is designed, and stable, efficient and reliable execution of automatic coating is realized by running a fixed program.
In addition, with the high-pressure turbine outer ring assembly brazing method of the present invention, when the high-pressure turbine outer ring assembly 7 is vacuum brazed, the following three schemes are implemented: scheme 1: the brazing temperature is 1020 ℃, and the heat preservation time is 7min. Scheme 2: the brazing temperature is 1020 ℃, and the heat preservation time is 10min. Scheme 3: the brazing temperature is 1020 ℃, and the heat preservation time is 13min. After visual inspection, good welding quality is achieved.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The paste brazing filler metal coating tool for the high-pressure turbine outer ring assembly is characterized by comprising a tool plate (3);
the bottom of the jig plate (3) is provided with a bottom backing plate (4), and the side wall of the bottom backing plate (4) is provided with a plurality of stop blocks (6);
a plurality of supporting blocks (5) are arranged on the end face of one end of the bottom base plate (4) close to the jig plate (3);
the top of tool board (3) sets up a plurality of bosss that are used for installing and spacing high pressure turbine outer loop subassembly (7), and processing is used for preventing the wrong step of direction of putting of high pressure turbine outer loop subassembly (7) on the boss.
2. The paste brazing filler metal coating tool for the high-pressure turbine outer ring assembly, according to claim 1, is characterized in that the jig plate (3) and the stop block (6) are made of bakelite, and the base plate (4) and the supporting block (5) are made of aluminum alloy; the jig plate (3) is connected with the bottom backing plate (4) and the bottom backing plate (4) is connected with the supporting block (5) by bolts; the stop block (6) is provided with a fixing hole which is used for being connected with a screw of the equipment working platform.
3. A method of brazing a high pressure turbine outer ring assembly, comprising:
assembling a high-pressure turbine outer ring assembly (7) on the paste solder coating tool of the high-pressure turbine outer ring assembly according to claim 1 or 2, and fixing the paste solder coating tool of the high-pressure turbine outer ring assembly on an equipment working platform of an automatic solder coating machine;
setting coating process parameters, and coating and injecting paste solder by a solder automatic coating and injecting machine;
and (3) coating a flow blocking agent in all small holes on the orifice plate (2) of the coated high-pressure turbine outer ring assembly (7) and at the position, close to the paste brazing filler metal coating, on the outer ring block (1), and then carrying out vacuum brazing on the high-pressure turbine outer ring assembly (7).
4. A method of brazing a high pressure turbine outer ring assembly in accordance with claim 3, wherein said setting of the coating process parameters comprises:
and according to the size of the space to be brazed of the high-pressure turbine outer ring assembly (7), debugging the automatic brazing filler metal coating machine by adopting a test plate weighing test method, and obtaining and setting coating technological parameters of the high-pressure turbine outer ring assembly (7).
5. A method for brazing a high-pressure turbine outer ring assembly according to claim 3, wherein when the high-pressure turbine outer ring assembly (7) is assembled on the paste brazing filler metal coating tool of the high-pressure turbine outer ring assembly (7) according to claim 1 or 2, an energy storage spot welding mode is adopted to assemble and position a pore plate (2) of the high-pressure turbine outer ring assembly (7) on an outer ring block (1) of the high-pressure turbine outer ring assembly (7), the energy storage spot welding energy is 60J, and a brazing gap to be welded of the assembled high-pressure turbine outer ring assembly (7) is smaller than 0.1mm; when the paste solder is coated and injected by the solder automatic coating and injecting machine, a double mark point is adopted to determine a search object and a search area on the high-pressure turbine outer ring assembly (7); wherein, the similarity of the double mark points is set to 75%, the angle deviation is set to +/-1 DEG, and the setting ratio is 0.035 mm/pixel.
6. A method of brazing an outer ring assembly of a high pressure turbine according to claim 3, wherein the paste solder is applied by an automatic solder applicator at a pressure of 60KPa and a speed of 10mm/ms.
7. A high-pressure turbine outer ring assembly brazing method according to claim 3, wherein the paste brazing filler metal is obtained by uniformly stirring powdered HBNi82CrSiB brazing filler metal and a binder.
8. A method of brazing a high pressure turbine outer ring assembly according to claim 3, wherein the brazing temperature is 1020 ℃ and the holding time is 7-13 min when the high pressure turbine outer ring assembly (7) is vacuum brazed.
9. A method of brazing a high pressure turbine outer ring assembly according to claim 3, wherein said applying a flow inhibitor in all of the apertures in the orifice plate (2) of the high pressure turbine outer ring assembly (7) after the applying and in the outer ring block (1) at a location adjacent to the applying of the paste solder comprises:
coating all small holes on an orifice plate (2) of a coated high-pressure turbine outer ring assembly (7) with Al 2 O 3 White choking agent prepared by micro powder; and red blocking agent with the brand of NICROBRAZ is coated on the outer ring block (1) at a position close to the position where the paste brazing filler metal is coated.
10. The method of brazing a high pressure turbine outer ring assembly in accordance with claim 9, further comprising:
blowing off the white flow blocking agent on the vacuum brazed high-pressure turbine outer ring assembly (7) by using compressed air, dipping the red flow blocking agent into acetone by using a hairbrush to remove the white flow blocking agent, and cleaning residual marks of the white flow blocking agent or residual marks of the red flow blocking agent by using sand paper or scouring pad; the splashed, overflowed or piled solder is removed by mechanical polishing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310476419.3A CN116237612A (en) | 2023-04-27 | 2023-04-27 | Paste solder coating tool and soldering method for high-pressure turbine outer ring assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310476419.3A CN116237612A (en) | 2023-04-27 | 2023-04-27 | Paste solder coating tool and soldering method for high-pressure turbine outer ring assembly |
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| JP3106374U (en) * | 2004-07-02 | 2005-01-06 | 日本インター株式会社 | Soldering jig |
| CN106216793A (en) * | 2016-08-23 | 2016-12-14 | 上海和伍复合材料有限公司 | A kind of method covering solder layer |
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