CN113664399A - Machining method of K-shaped partition plate cavity - Google Patents
Machining method of K-shaped partition plate cavity Download PDFInfo
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- CN113664399A CN113664399A CN202110936937.XA CN202110936937A CN113664399A CN 113664399 A CN113664399 A CN 113664399A CN 202110936937 A CN202110936937 A CN 202110936937A CN 113664399 A CN113664399 A CN 113664399A
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- 238000005192 partition Methods 0.000 title claims abstract description 137
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000003754 machining Methods 0.000 title claims abstract description 17
- 238000005219 brazing Methods 0.000 claims abstract description 98
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 28
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052786 argon Inorganic materials 0.000 claims abstract description 14
- 238000003466 welding Methods 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 238000003801 milling Methods 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 41
- 229910052751 metal Inorganic materials 0.000 claims description 41
- 238000010438 heat treatment Methods 0.000 claims description 39
- 238000001816 cooling Methods 0.000 claims description 20
- 238000012360 testing method Methods 0.000 claims description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 239000002390 adhesive tape Substances 0.000 claims description 7
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 7
- 239000010931 gold Substances 0.000 claims description 7
- 229910052737 gold Inorganic materials 0.000 claims description 7
- 229910000679 solder Inorganic materials 0.000 claims description 7
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 239000008213 purified water Substances 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 230000003044 adaptive effect Effects 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 230000001788 irregular Effects 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000003350 kerosene Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
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- 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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention relates to the technical field of aerospace precision machining, and discloses a machining method of a K-shaped partition plate cavity, which comprises the following steps: A1. processing a partition plate and a three-way adapter, and assembling the adapter and the partition plate; fixing the adapter and the partition plate by using a partition plate tool, and performing vacuum brazing to obtain a K-shaped partition plate assembly; A2. a fan-shaped water tank, a runner square hole and a flow hole which are communicated with the water inlet hole are processed on the body; cutting a plurality of annular ribs; assembling the ring rib on the inner end surface of the body; fixing the annular rib and the body by using a body tool, and performing vacuum brazing to obtain a body assembly; A3. dividing the body assembly into an inner body ring and an outer body ring; finish turning the upper and lower end surfaces of the inner ring and the annular rib of the body to form a sinking table surface respectively, and finish milling a compensation block; roughly turning a reinforcing block; assembling the K-shaped partition plate assembly, the reinforcing block and the compensating block on the inner ring of the body; after the partition board is fixed by a cavity tool, carrying out vacuum brazing to obtain a K-shaped partition board cavity; A4. and (3) performing argon arc welding on the outer ring of the body at the periphery of the sub-cavity of the K-shaped partition plate, and performing finish machining to obtain the K-shaped partition plate cavity.
Description
Technical Field
The invention relates to the technical field of aerospace precision machining, in particular to a machining method of a K-shaped partition plate cavity.
Background
The K-shaped partition plate cavity is a part in the aerospace scramjet power ground test device, mainly has the function of forming a cooling channel which needs to bear pressure of 5MPa in a partition plate cavity assembly and is used for cooling high-temperature fuel gas passing through a K-shaped area, and mainly comprises a body, a ring rib, a plurality of partition plates and a connector connected among the partition plates; wherein, a plurality of baffles are brazed with the adapter and are formed K-shaped baffle plate assembly, and body and the body assembly that forms after the annular rib is brazed, K-shaped baffle plate assembly forms K-shaped baffle plate chamber after being brazed with the body assembly.
The following problems exist when the prior art is adopted to process the K-shaped partition plate cavity: 1) the size of the body assembly is large, the K-shaped partition plate assembly is irregular and irregular, and the assembly gap is difficult to guarantee when the K-shaped partition plate assembly and the K-shaped partition plate assembly are assembled; 2) when brazing the body assembly and the K-shaped clapboard assembly, the K-shaped clapboard assembly and the body assembly have large mass, weight and size difference, and the heat distribution is uneven easily in the brazing process, so that the K-shaped clapboard assembly deforms.
Disclosure of Invention
The invention provides a method for processing a K-shaped partition plate cavity, which solves the problems that a K-shaped partition plate assembly and a body assembly are not easy to assemble in the process of processing the K-shaped partition plate cavity in the prior art, and the K-shaped partition plate assembly is easy to deform during brazing after assembly.
The invention is realized by the following scheme:
a machining method of a K-shaped partition plate cavity comprises the following steps:
A1. processing a plurality of straight-line-shaped partition plates with different sizes and a plurality of three-way adapters, coating paste-shaped brazing filler metal at the interface of each adapter, and assembling the brazing filler metal and the partition plates; fixing the plurality of adapters and the plurality of clapboards by a clapboard tool, and performing vacuum brazing to obtain a K-shaped clapboard assembly;
A2. roughly turning an annular body, roughly drilling a plurality of reference holes on the annular surface of the annular body, boring and milling a plurality of water inlet holes around the annular body, and processing a fan-shaped water tank, a flow channel square hole and a flow hole which are communicated with the water inlet holes on the body; cutting a plurality of annular ribs in a line, and lathing a plurality of cooling channels on the outer end surface of each annular rib to form ribs between adjacent cooling channels; the adhesive band brazing filler metal is preset on the ribs, the annular ribs are assembled on the inner end face of the body, so that the interfaces of the annular ribs correspond to the square holes of the flow channels, and the cooling channels correspond to the flow holes; fixing the annular rib and the body by using a body tool, and performing vacuum brazing to obtain a body assembly;
A3. dividing the body assembly into an inner body ring and an outer body ring; finish turning the upper and lower end faces of the inner ring and the annular rib of the body to form a sinking table surface respectively, and finish milling a compensation block according to the sinking table surface; roughly turning a reinforcing block with a square groove in the middle, and machining brazing filler metal grooves on the outer end surface and two sides of the square groove; presetting adhesive tape brazing filler metal on the bottom surface of the compensation block, coating paste brazing filler metal in a brazing filler metal groove of the reinforcement block, and assembling the K-shaped partition plate assembly, the reinforcement block and the compensation block on the inner ring of the body; fixing the K-shaped partition plate assembly, the reinforcing block, the compensating block and the inner ring of the body by using a cavity tool, and performing vacuum brazing to obtain a K-shaped partition plate sub-cavity; A4. and (3) performing argon arc welding on the outer ring of the body at the periphery of the sub-cavity of the K-shaped partition plate, and performing finish machining to obtain the K-shaped partition plate cavity.
Further, the body is made of stainless steel; the partition plate, the adapter, the annular rib, the compensation block and the reinforcing block are all made of high-strength copper alloy materials; the paste brazing filler metal and the sticky brazing filler metal are both made of nickel-based gold-containing materials.
Further, during fixing, respectively brushing solder resist with the thickness of 0.1-0.2mm on contact surfaces of the partition plate tool and the K-shaped partition plate assembly, the body tool and the body assembly, and the cavity tool and a sub-cavity of the K-shaped partition plate;
the diameters of the paste solder coating are all 0.5-1 mm;
the preset thickness of the adhesive tape brazing filler metal is 0.05-0.1 mm.
Further, the partition plate tool comprises a plurality of L-shaped clamping plates which are arranged on the bottom plate and are processed according to the size of the partition plate; the vertical plates of the clamping plates are arranged on two sides of the partition plate, the transverse plates of the clamping plates and the bottom plate are provided with corresponding fixing holes, and the clamping plates are fixed on two sides of the partition plate by arranging fasteners in the fixing holes to clamp the partition plate; the bottom plate sets up the round hole that prevents unnecessary brazing filler metal with K shape baffle subassembly and cavity frock adhesion with the region that the adapter corresponds.
Further, the flow of vacuum brazing the partition plate and the adapter is as follows:
cold state vacuum degree of 2-5X 10-2Pa, the working vacuum degree is 3-5 Pa;
heating to 400-500 ℃ at the speed of 150 ℃/h and keeping for 0.3-0.5 h;
heating to 900-950 ℃ at the rate of 150-180 ℃/h, and keeping the partial pressure at 3-5Pa for 2-4 h;
heating to 1010-1035 ℃ at the rate of 210 ℃/h and 180 ℃ and keeping the temperature at 3-5Pa for 0.2-0.5 h;
cooling to 700 and 750 ℃ at the temperature of 150 and 180 ℃/h, and filling high-purity argon into the furnace along with the furnace cooling to 400 and 500 ℃ so that the pressure in the furnace reaches 6-8 x 104And (4) starting a fan after Pa, cooling to below 100 ℃ and discharging.
Further, the body tool comprises a plurality of lining plates and a plurality of top plates which are fixed on the base and are sequentially arranged in the annular rib; the inner end surface and the top plate of the lining plate are both arranged to be regular polygons, and the outer end surface of the lining plate is arranged to be an arc matched with the annular rib; a plurality of pressing holes are uniformly formed in the top plate, and the lining plate presses the annular rib by fixing the pressing piece in the pressing holes, so that the annular rib is tightly attached to the body.
Further, the vacuum brazing process of the body and the annular rib is as follows:
cold state vacuum degree of 2-5X 10-2Pa, the working vacuum degree is 3-5 Pa;
heating to 400-500 ℃ at the speed of 60-90 ℃/h, and keeping for 0.3-0.5 h;
heating to 900-950 ℃ at the rate of 90-120 ℃/h, and keeping for 4-6 h;
heating to 1010-1035 ℃ at the rate of 120-150 ℃/h, and keeping the temperature for 0.2-0.5 h;
after the heating is finished, the temperature is controlled and cooled to 700-750 ℃ at the speed of 90-120 ℃/h, the furnace is cooled to 400-500 ℃ along with the furnace, and high-purity argon is filled into the furnace to ensure that the pressure in the furnace reaches 6-8X 104And (4) starting a fan after Pa, cooling to below 100 ℃ and discharging.
Further, the cavity tool comprises a fixing assembly connected between the first fixing plate and the second fixing plate; the inner end face of the first fixing plate is an arc face adaptive to the outer end face of the K-shaped partition plate cavity, the outer end face of the first fixing plate is a plane, the inner end face of the second fixing plate is a plane, and the outer end face of the first fixing plate is an arc face adaptive to the inner end face of the K-shaped partition plate cavity; offer the perpendicular groove that is adapted to the baffle size between first fixed plate upper portion to bottom, all be equipped with the trompil that is used for running through fixed subassembly on first fixed plate and the second fixed plate, run through fixed subassembly, fix in the trompil between first fixed plate and the second fixed plate, make compensation piece and body inner ring compress tightly.
Further, the vacuum brazing process of the K-shaped clapboard assembly and the inner ring of the body comprises the following steps:
cold state vacuum degree of 2-5X 10-2Pa, the working vacuum degree is 3-5 Pa;
heating to 400-500 ℃ at the speed of 45-60 ℃/h, and keeping for 0.3-0.5 h;
heating to 900-950 ℃ at the speed of 60-90 ℃/h, and keeping the partial pressure at 3-5Pa for 4-5 h;
heating to 1010-1035 ℃ at the rate of 90-120 ℃/h and keeping the temperature at 3-5Pa for 0.2-0.5 h;
after the heating is finished, the temperature is controlled and cooled to 700-750 ℃ at the speed of 90-120 ℃/h, the furnace is cooled to 400-500 ℃ along with the furnace, and high-purity argon is filled into the furnace to ensure that the pressure in the furnace reaches 6-8X 104And (4) starting a fan after Pa, cooling to below 100 ℃ and discharging.
Further, after the K-shaped partition plate assembly, the body assembly and the K-shaped partition plate are separated, pressure testing is carried out on the K-shaped partition plate assembly, the body assembly and the K-shaped partition plate; the conditions of the pressure test are the same and are as follows: testing is carried out for 30min under the purified water pressure of 5 MPa.
The invention has the following advantages:
1) in order to ensure the assembling and brazing quality of the irregular K-shaped partition plate assembly and the body assembly, firstly, the body assembly is divided into an inner body ring and an outer body ring, the inner body ring is firstly assembled and brazed with the irregular K-shaped partition plate assembly to obtain a partition plate cavity split body, and then argon arc welding is carried out on the partition plate cavity split body and the outer body ring; by the method, the assembly difficulty and the assembly workload of the K-shaped partition plate assembly and the body assembly are reduced, the quality difference between the body assembly and the K-shaped partition plate assembly is also reduced, the heat distribution is relatively uniform in the brazing process, and the deformation of the K-shaped partition plate assembly during brazing is reduced;
2) the brazing structure of the inner ring of the body and the K-shaped partition plate assembly is adjusted, the reinforcing block and the compensating block are added, the brazing of the body assembly and the K-shaped partition plate assembly is adjusted to be the brazing of the K-shaped partition plate assembly, the reinforcing block, the compensating block and the inner ring of the body, the brazing area is increased, and the brazing seam strength is enhanced.
Drawings
FIG. 1 is a schematic view of a K-shaped baffle plate assembly;
FIG. 2 is a right side view of the K-shaped diaphragm assembly;
FIG. 3 is a top view of the spacer tool;
FIG. 4 is a cross-sectional view of the spacer tool taken along line A-A;
FIG. 5 is a schematic view of the body assembly;
FIG. 6 is a cross-sectional view of the body assembly along the longitudinal axis;
FIG. 7 is a schematic view of the engaging surface of the annular rib and the body;
FIG. 8 is a schematic view of a body tooling;
FIG. 9 is a cross-sectional view of the body tooling along a transverse axis;
FIG. 10 is a schematic view of the body inner ring and the body outer ring;
FIG. 11 is a schematic view of the assembly of the K-shaped diaphragm assembly, the inner ring of the body and the reinforcing block;
FIG. 12 is a schematic view of a cavity tooling fixing a K-shaped baffle assembly and a body inner ring;
fig. 13 is a structural view of a second fixing plate;
FIG. 14 is a schematic view of argon arc welding of the inner ring and the outer ring of the body;
FIG. 15 is a cross-sectional view taken along the central axis of the inner ring and the outer ring of the main body during argon arc welding;
FIG. 16 is a schematic view of a K-shaped baffle cavity;
in the figure: 1-partition plate, 2-adapter, 3-partition plate tool, 31-bottom plate, 32-clamping plate, 33-fastening piece, 4-body, 5-ring rib, 6-body tool, 61-base, 62-top plate, 63-lining plate, 64-pressing piece, 7-compensating block, 8-reinforcing block, 9-cavity tool, 91-first fixing plate, 92-second fixing plate, 93-fixing component, 10-body inner ring and 11-body outer ring.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
Example 1
A machining method of a K-shaped partition plate cavity comprises the following steps:
A1. cutting five corrugated plates and hollow plates with different sizes by using a high-strength copper alloy material line; spot welding a layer of amorphous brazing filler metal on the two sides of the corrugated plate, respectively assembling the amorphous brazing filler metal in the five hollow plates, enabling the contact surfaces of the two hollow plates to be tightly attached, and allowing a plurality of layers of brazing filler metals to be fixed if the gap is too large until the two hollow plates are pressed;
putting the assembled corrugated plate and hollow plate into a vacuum brazing furnace, and brazing according to the following procedures:
cold state vacuum degree of 2-5X 10-2Pa, the working vacuum degree is 3-5 Pa;
heating to 400-500 ℃ at the speed of 300 ℃/h of 240-0 ℃, and keeping for 0.2-0.4 h;
heating to 900-950 ℃ at the rate of 300-360 ℃/h, and keeping the partial pressure at 3-5Pa for 1-2 h;
heating to 1020-1035 ℃ at the speed of 360-420 ℃/h, and keeping the partial pressure at 3-5Pa for 0.2-0.5 h;
after the heating is finished, the furnace is cooled to 400-500 ℃ along with the furnace, and high-purity argon is filled into the furnace to ensure that the pressure in the furnace reaches 6-8 multiplied by 104After Pa, starting a fan to cool to below 100 ℃ and discharging;
after the brazing is finished, a linear clapboard 1 with a plurality of through grooves inside is obtained;
cutting the two adapters 2 in a line, so that two directions of the adapters 2 are on the same straight line, and the other direction forms a certain angle with the straight line; milling a brazing filler metal groove in the interface of the adapter 2;
cleaning the partition plate 1 and the adapter 2 by using kerosene and alcohol; cutting a rotary joint cover on one end line of the rotary joint 2; coating and injecting a nickel-based gold-containing paste brazing filler metal into a brazing filler metal groove of the adapter 2, adhering a 0.05mm thick nickel-based gold-containing adhesive tape brazing filler metal to the inner end surface of the interface, assembling five partition plates 1 and two adapter ports 2 into a K shape, and ensuring that the angular deviation between the five partition plates and the two adapter ports is less than 0.2 mm; a layer of nickel-based gold-containing adhesive tape brazing filler metal with the thickness of 0.1mm is adhered to the inner wall of the adapter cover and is assembled on the adapter 2;
respectively coating solder resist with the thickness of 0.1-0.2mm on the contact surfaces of the partition plate tool 3, the partition plate 1 and the adapter 2 shown in the figures 3 and 4; fixing the assembled partition board and the adapter 2 by using a partition board tool 3; specifically, the partition fixture 3 comprises a plurality of L-shaped clamping plates 32 which are arranged on a bottom plate 31 and are processed according to the size of the partition 1; the vertical plates of the clamping plates 32 are arranged on two sides of the partition board 1, the transverse plates of the clamping plates 32 and the bottom plate 31 are provided with corresponding fixing holes, and the clamping plates 32 are fixed on two sides of the partition board 1 by arranging fasteners 33 in the fixing holes to clamp the partition board 1; a circular hole for preventing the redundant brazing filler metal from adhering the partition plate, the adapter and the cavity tool is formed in the area, corresponding to the adapter 2, of the bottom plate 31;
putting the partition plate tool 3, the assembled partition plate 1 and the adapter 2 into a vacuum brazing furnace, and brazing according to the following procedures:
cold state vacuum degree of 2-5X 10-2Pa, the working vacuum degree is 3-5 Pa;
heating to 400-500 ℃ at the speed of 150 ℃/h and keeping for 0.3-0.5 h;
heating to 900-950 ℃ at the rate of 150-180 ℃/h, and keeping the partial pressure at 3-5Pa for 2-4 h;
heating to 1010-1035 ℃ at the rate of 210 ℃/h and 180 ℃, and keeping the partial pressure at 3-5Pa for 0.2-0.5 h;
after the heating is finished, the temperature is controlled and cooled to 700-4After Pa, starting a fan to cool to below 100 ℃ and discharging;
after the brazing is finished, obtaining a K-shaped clapboard assembly shown in the figures 1 and 2;
visually inspecting the integrity of the brazing seam, and testing the pressure of a cavity channel of the K-shaped partition plate cavity, wherein the testing medium is purified water, and the testing is carried out for 30min under the condition that the pressure is 5MPa, so that the brazing seam is ensured not to be leaked;
A2. roughly turning an annular body 4 by using stainless steel, roughly drilling a plurality of reference holes on the annular surface of the annular body, boring and milling a plurality of water inlet holes on the periphery of the annular body, cutting a plurality of fan-shaped grooves and a plurality of wedge-shaped vertical grooves on the inner periphery of the body according to the positions of the water inlet holes, and forming a spigot at the groove opening; processing a plurality of upper cover plates and a plurality of lower cover plates matched with the fan-shaped grooves by using stainless steel, and processing interfaces matched with a plurality of wedge-shaped inserts on the inner end surfaces of the upper cover plates and the lower cover plates; processing a plurality of wedge-shaped inserts matched with the wedge-shaped vertical grooves by using a stainless steel material, processing a step groove and 32 flow holes with the angles of 15 degrees and the diameters of 3mm on the inner end surface of each wedge-shaped insert, processing 7 flow channel square holes inside, and processing at least 3 brazing filler metal grooves on two surfaces respectively; presetting nickel-based paste brazing filler metal at the seam allowance and the brazing filler metal groove, and respectively assembling a plurality of upper cover plates and a plurality of lower cover plates at a plurality of fan-shaped grooves to form a fan-shaped water tank between each group of upper cover plates and lower cover plates; respectively assembling a plurality of wedge-shaped inserts at a plurality of wedge-shaped vertical grooves to enable the water inlet hole, the fan-shaped water tank and the runner square hole to be communicated with the flow hole; putting the assembled body, the upper cover plate, the lower cover plate and the wedge-shaped insert into an effective area of a vacuum brazing furnace for vacuum brazing;
processing a plurality of annular ribs 5 with different sizes by using a high-strength copper alloy material, and lathing 16 cooling channels with the width of 3mm on the outer surfaces of the four annular ribs 5 to form ribs with the width of 3mm between the adjacent cooling channels;
cleaning the body 4 and the annular ribs 5 by using kerosene and alcohol, adhering a layer of nickel-based gold-containing brazing filler metal with the thickness of 0.1mm at each rib part, and assembling four annular ribs 5 on the inner periphery of the body 4 as shown in fig. 7, so that the interfaces of the annular ribs 5 correspond to the square flow channel holes of the insert blocks, and the cooling channels correspond to the flow holes;
respectively coating solder resist with the thickness of 0.1-0.2mm on the contact surfaces of the body tool 6, the body 4 and the annular rib 5 shown in the figures 8 and 9; fixing the annular rib 5 and the body 4 by using a body tool 6, wherein the body tool 6 comprises a plurality of lining plates 63 and a top plate 62 which are fixed on a base 61 and sequentially arranged in the annular rib; the inner end surface of the lining plate 63 and the top plate 62 are both set to be regular polygons, and the outer end surface of the lining plate 63 is set to be an arc shape matched with the annular rib 5; a plurality of pressing holes are uniformly formed in the top plate 62, and the lining plate 63 presses the annular rib 5 by fixing the pressing piece 64 in the pressing holes, so that the annular rib 5 is tightly attached to the body 4;
placing the body tool 6, the annular rib 5 and the body 4 in a vacuum brazing furnace, and brazing according to the following parameters:
cold state vacuum degree of 2-5X 10-2Pa, the working vacuum degree is 3-5 Pa;
heating to 400-500 ℃ at the speed of 60-90 ℃/h, and keeping for 0.3-0.5 h;
heating to 900-950 ℃ at the rate of 90-120 ℃/h, and keeping for 4-6 h;
heating to 1010-1035 ℃ at the rate of 120-150 ℃/h, and keeping the temperature for 0.2-0.5 h;
after the heating is finished, the temperature is controlled and cooled to 700-4After Pa, starting a fan to cool to below 100 ℃ and discharging;
after the brazing is finished, a body assembly shown in the figures 5 and 6 is obtained;
after the brazing is finished, visually checking the integrity of a brazing seam, and testing the cavity pressure of the body assembly; specifically, the test medium is purified water, and the test is carried out for 30min under the condition that the pressure is 5MPa, so that the brazing seam is ensured not to leak;
A3. as shown in fig. 10, the body assembly is line-cut into a body inner ring 10 and a body outer ring 11; finely turning sinking table surfaces on the upper end surfaces and the lower end surfaces of the inner ring 10 and the ring ribs of the body respectively, and finely milling the lower surfaces of the inner ring and the ring ribs by using a high-strength copper alloy material according to the sinking table surfaces to be matched with the sinking table surfaces, wherein the upper surfaces are planar compensating blocks 7; roughly turning a reinforcing block 8 with a plane inner end surface and a matched outer end surface with the ring rib by using a high-strength copper alloy material, forming a square groove in the middle of the reinforcing block 8, and cutting brazing filler metal grooves on two sides of the square groove and the outer end surface of the reinforcing block 8;
cleaning the compensation block 7 and the reinforcing block 8 by using kerosene and alcohol, as shown in fig. 11, pre-arranging paste-shaped brazing filler metal in a brazing filler metal groove of the reinforcing block 8, assembling the brazing filler metal on the inner end surface of an inner ring 10 of the body, and assembling a partition plate 1 at the outer end of the K-shaped partition plate assembly in a step groove of the insert after penetrating through a square groove of the reinforcing block 8 and an interface of a ring rib 5; a layer of 0.1mm nickel-based gold-containing adhesive tape brazing filler metal is adhered to the bottom surface of the compensation block 7 and then assembled in the sinking platform surface;
respectively coating solder resist with the thickness of 0.1-0.2mm on the contact surfaces of the cavity tool 9, the K-shaped partition plate assembly, the reinforcing block 8, the compensating block 7 and the inner ring of the body as shown in figures 12 and 13; fixing the K-shaped partition plate assembly, the reinforcing block 8, the compensating block 7 and the body inner ring 10 by using a cavity tool 9, wherein the cavity tool 9 comprises a fixing assembly 93 connected between a first fixing plate 91 and a second fixing plate 92; the inner end face of the first fixing plate 91 is an arc face adapted to the outer end face of the K-shaped partition cavity, the outer end face is a plane, the inner end face of the second fixing plate 92 is a plane, and the outer end face is an arc face adapted to the inner end face of the K-shaped partition cavity; a vertical groove which is suitable for the size of the partition board 1 is formed between the upper part and the bottom of the first fixing plate 91, the first fixing plate 91 and the second fixing plate 92 are both provided with an opening for penetrating the fixing component 93, and the fixing component 93 penetrates and is fixed in the opening between the first fixing plate 91 and the second fixing plate 92, so that the compensation block 7, the reinforcing block 8 and the inner body ring 10 are pressed tightly;
placing the cavity tool 9, the K-shaped partition plate assembly, the reinforcing block 8, the compensating block 7 and the body inner ring 10 in a vacuum brazing furnace, and brazing according to the following parameters:
cold state vacuum degree of 2-5X 10-2Pa, the working vacuum degree is 3-5 Pa;
heating to 400-500 ℃ at the speed of 45-60 ℃/h, and keeping for 0.3-0.5 h;
heating to 900-950 ℃ at the speed of 60-90 ℃/h, and keeping the partial pressure at 3-5Pa for 4-5 h;
heating to 1010-1035 ℃ at the rate of 90-120 ℃/h and keeping the temperature at 3-5Pa for 0.2-0.5 h;
after the heating is finished, the temperature is controlled and cooled to 700-750 ℃ at the speed of 90-120 ℃/h, the furnace is cooled to 400-500 ℃ along with the furnace, and high-purity argon is filled into the furnace to ensure that the pressure in the furnace reaches 6-8X 104After Pa, starting a fan to cool to below 100 ℃ and discharging;
obtaining a K-shaped partition plate cavity after brazing;
visually checking the integrity of the drill seam, and performing pressure test on the K-shaped partition plate cavity; specifically, the test medium is purified water, and the test is carried out for 30min under the condition that the pressure is 5MPa, so that the brazing seam is ensured not to leak;
A4. as shown in fig. 14 and 15, the outer ring 11 of the main body is argon arc welded on the periphery of the partitioned cavity of the K-shaped partition board, and in order to prevent the influence on the brazing seam, the argon arc welding operation is carried out under the cooling of circulating water;
finely machining the K-shaped partition plate cavity to the designed size, and removing the redundant part of the reinforcing block 8;
after finishing, a K-shaped partition cavity as shown in fig. 16 is obtained;
placing the K-shaped clapboard cavity in a vacuum brazing furnace to eliminate stress;
testing the pressure of the cavity channel of the K-shaped partition plate; specifically, the test medium is purified water, and the test is carried out for 30min under the condition that the pressure is 5MPa, so that the brazing seam is ensured not to leak.
By the method, the processing of the K-shaped partition plate cavity is realized, the cavity channel is not leaked in the pressure experiment process, and the deformation of the K-shaped partition plate assembly is within 0.5mm, so that the design requirement is met.
The invention has the beneficial effects that: in order to ensure the assembling and brazing quality of the K-shaped partition plate assembly and the body assembly, firstly, the body assembly is divided into an inner body ring and an outer body ring, the inner body ring is firstly assembled and brazed with the special-shaped K-shaped partition plate assembly to obtain a partition plate cavity split body, and then argon arc welding is carried out on the inner body ring and the outer body ring; by the method, the assembly difficulty and the assembly workload of the K-shaped partition plate assembly and the body assembly are reduced, the quality difference between the body assembly and the K-shaped partition plate assembly is also reduced, the heat distribution is relatively uniform in the brazing process, and the deformation of the K-shaped partition plate assembly during brazing is reduced; the brazing structure of the body inner ring and the K-shaped partition plate assembly is adjusted, the reinforcing block and the compensating block are added, brazing of the body assembly and the K-shaped partition plate assembly is adjusted to brazing of the K-shaped partition plate assembly, the reinforcing block, the compensating block and the body inner ring, the brazing area is increased, and the brazing seam strength is enhanced.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (10)
1. A machining method of a K-shaped partition plate cavity is characterized by comprising the following steps:
A1. processing a plurality of straight-line-shaped partition plates with different sizes and a plurality of three-way adapters, coating paste-shaped brazing filler metal at the interface of each adapter, and assembling the brazing filler metal and the partition plates; fixing the plurality of adapters and the plurality of clapboards by a clapboard tool, and performing vacuum brazing to obtain a K-shaped clapboard assembly;
A2. roughly turning an annular body, roughly drilling a plurality of reference holes on the annular surface of the annular body, boring and milling a plurality of water inlet holes around the annular body, and processing a fan-shaped water tank, a flow channel square hole and a flow hole which are communicated with the water inlet holes on the body; cutting a plurality of annular ribs in a line, and lathing a plurality of cooling channels on the outer end surface of each annular rib to form ribs between adjacent cooling channels; the adhesive band brazing filler metal is preset on the ribs, the annular ribs are assembled on the inner end face of the body, so that the interfaces of the annular ribs correspond to the square holes of the flow channels, and the cooling channels correspond to the flow holes; fixing the annular rib and the body by using a body tool, and performing vacuum brazing to obtain a body assembly;
A3. dividing the body assembly into an inner body ring and an outer body ring; finish turning the upper and lower end faces of the inner ring and the annular rib of the body to form a sinking table surface respectively, and finish milling a compensation block according to the sinking table surface; roughly turning a reinforcing block with a square groove in the middle, and machining brazing filler metal grooves on the outer end surface and two sides of the square groove; presetting adhesive tape brazing filler metal on the bottom surface of the compensation block, coating paste brazing filler metal in a brazing filler metal groove of the reinforcement block, and assembling the K-shaped partition plate assembly, the reinforcement block and the compensation block on the inner ring of the body; after the partition board is fixed by a cavity tool, carrying out vacuum brazing to obtain a K-shaped partition board cavity;
A4. and (3) performing argon arc welding on the outer ring of the body at the periphery of the sub-cavity of the K-shaped partition plate, and performing finish machining to obtain the K-shaped partition plate cavity.
2. The method for processing the K-shaped partition plate cavity according to claim 1, wherein the body is made of stainless steel; the partition plate, the adapter, the annular rib, the compensation block and the reinforcing block are all made of high-strength copper alloy materials; the paste brazing filler metal and the tape bonding brazing filler metal are nickel-based gold-containing brazing filler metals.
3. The method for processing the K-shaped partition board cavity according to claim 2, wherein when the K-shaped partition board cavity is fixed, the contact surfaces of the partition board tool and the K-shaped partition board assembly, the body tool and the body assembly, and the cavity tool and the K-shaped partition board cavity are respectively coated with a solder resist with the thickness of 0.1-0.2 mm;
the diameters of the paste solder coating are all 0.5-1 mm;
the preset thickness of the adhesive tape brazing filler metal is 0.05-0.1 mm.
4. The method for processing the K-shaped partition chamber according to claim 1, wherein the partition tool comprises a plurality of L-shaped clamping plates which are arranged on a bottom plate and processed according to the size of the partition; the vertical plates of the clamping plates are arranged on two sides of the partition plate, the transverse plates of the clamping plates and the bottom plate are provided with corresponding fixing holes, and the clamping plates are fixed on two sides of the partition plate by arranging fasteners in the fixing holes to clamp the partition plate; the bottom plate is provided with a circular hole for preventing the adhesion of the partition plate, the adapter and the cavity tool by the redundant brazing filler metal in the area corresponding to the adapter.
5. The method of claim 4, wherein the vacuum brazing process of the partition and the adapter is as follows:
cold state vacuum degree of 2-5X 10-2Pa, the working vacuum degree is 3-5 Pa;
heating to 400-500 ℃ at the speed of 150 ℃/h and keeping for 0.3-0.5 h;
heating to 900-950 ℃ at the rate of 150-180 ℃/h, and keeping the partial pressure at 3-5Pa for 2-4 h;
heating to 1010-1035 ℃ at the rate of 210 ℃/h and 180 ℃, and keeping the partial pressure at 3-5Pa for 0.2-0.5 h;
after the heating is finished, the temperature is controlled and cooled to 700-4And (4) starting a fan after Pa, cooling to below 100 ℃ and discharging.
6. The machining method of the K-shaped partition plate cavity according to claim 1, wherein the body tool comprises a plurality of lining plates and top plates which are fixed on a base and sequentially arranged inside an annular rib; the inner end surface and the top plate of the lining plate are both arranged to be regular polygons, and the outer end surface of the lining plate is arranged to be an arc matched with the annular rib; a plurality of pressing holes are uniformly formed in the top plate, and the lining plate presses the annular rib by fixing the pressing piece in the pressing holes, so that the annular rib is tightly attached to the body.
7. The method for processing the K-shaped partition plate cavity according to claim 6, wherein the vacuum brazing process of the body and the annular rib is as follows:
cold state vacuum degree of 2-5X 10-2Pa, the working vacuum degree is 3-5 Pa;
heating to 400-500 ℃ at the speed of 60-90 ℃/h, and keeping for 0.3-0.5 h;
heating to 900-950 ℃ at the rate of 90-120 ℃/h, and keeping for 4-6 h;
heating to 1010-1035 ℃ at the rate of 120-150 ℃/h, and keeping the temperature for 0.2-0.5 h;
after the heating is finished, the temperature is controlled and cooled to 700-4And (4) starting a fan after Pa, cooling to below 100 ℃ and discharging.
8. The method for processing the K-shaped partition cavity according to claim 1, wherein the cavity tool comprises a fixing assembly connected between a first fixing plate and a second fixing plate; the inner end face of the first fixing plate is an arc face adaptive to the outer end face of the K-shaped partition plate cavity, the outer end face of the first fixing plate is a plane, the inner end face of the second fixing plate is a plane, and the outer end face of the first fixing plate is an arc face adaptive to the inner end face of the K-shaped partition plate cavity; offer the perpendicular groove that is adapted to the baffle size between first fixed plate upper portion to bottom, all be equipped with the trompil that is used for running through fixed subassembly on first fixed plate and the second fixed plate, run through fixed subassembly, fix in the trompil between first fixed plate and the second fixed plate, make compensation piece and body inner ring compress tightly.
9. The method of claim 8, wherein the vacuum brazing process of the K-shaped diaphragm assembly and the inner ring of the body is as follows:
cold state vacuum degree of 2-5X 10-2Pa, the working vacuum degree is 3-5 Pa;
heating to 400-500 ℃ at the speed of 45-60 ℃/h, and keeping for 0.3-0.5 h;
heating to 900-950 ℃ at the speed of 60-90 ℃/h, and keeping the partial pressure at 3-5Pa for 4-5 h;
heating to 1010-1035 ℃ at the rate of 90-120 ℃/h and keeping the temperature at 3-5Pa for 0.2-0.5 h;
after the heating is finished, the temperature is controlled and cooled to 700-4And (4) starting a fan after Pa, cooling to below 100 ℃ and discharging.
10. The machining method of the K-shaped partition plate cavity according to claim 1, wherein after the K-shaped partition plate assembly, the body assembly and the K-shaped partition plate are separated, a pressure test is further performed on the K-shaped partition plate assembly, the body assembly and the K-shaped partition plate; the conditions of the pressure test are the same and are as follows: testing is carried out for 30min under the purified water pressure of 5 MPa.
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