CN113172265A - Anti-cavity-crossing high-temperature gas generation device body and machining method thereof - Google Patents
Anti-cavity-crossing high-temperature gas generation device body and machining method thereof Download PDFInfo
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- 238000003754 machining Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title claims description 36
- 238000003466 welding Methods 0.000 claims abstract description 77
- 238000003801 milling Methods 0.000 claims abstract description 32
- 238000005242 forging Methods 0.000 claims abstract description 11
- 238000003672 processing method Methods 0.000 claims abstract description 11
- 238000000137 annealing Methods 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 4
- 230000004323 axial length Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 229910000679 solder Inorganic materials 0.000 claims 1
- 238000005219 brazing Methods 0.000 abstract description 21
- 238000003825 pressing Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 16
- 238000002485 combustion reaction Methods 0.000 description 13
- 238000001816 cooling Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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- 238000007514 turning Methods 0.000 description 1
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- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
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Abstract
The invention provides a cavity-crossing-preventing high-temperature gas generating device body and a processing method thereof, and solves the problems of low welding quality, low reliability and high cost of the existing high-temperature gas generating device body for ground test which is connected by brazing. The body part comprises a cylindrical structure body, a plurality of grooves which are axially arranged on the outer wall of the body part body and are uniformly distributed on the circumference, and a strip-shaped cover plate which covers each groove; the gap between two adjacent cover plates is filled by welding. The body processing method comprises the following steps: 1) processing a cylindrical forging and pressing piece and drilling to form a cylindrical structure; 2) indexing the excircle of the cylindrical structure, and milling a groove at an indexing position; 3) processing corresponding strip-shaped cover plates according to the number and the size of the grooves to be processed and the required outer diameter of the body; 4) welding the strip-shaped cover plate on the corresponding groove; 5) welding gaps between adjacent strip-shaped cover plates to form cylindrical body blanks; 6) annealing treatment; 7) and (5) machining the inner circle and the outer circle of the body blank to required sizes.
Description
Technical Field
The invention relates to a direct connection test technology of a ramjet, in particular to a cavity-crossing-preventing high-temperature fuel gas generation device body of an incoming flow simulation system of a ground direct connection test of the ramjet and a processing method thereof.
Background
The ramjet in flight absorbs air from the atmosphere as an oxidant, burns with fuel carried by the ramjet to generate thrust, and the working conditions of the inner flow and the outer flow of the ramjet are determined by the atmospheric parameters of a certain flight altitude: static pressure, static temperature and flight speed. And calculating parameters such as total temperature, total pressure, Mach number and the like of the air flow at the inlet of the air inlet channel according to the atmospheric parameters in the flight and the critical geometric dimension of the air inlet channel of the engine.
In the ground test process, the total temperature simulation usually adopts a mode of heating air by combusting an oxidant and a fuel to generate high-temperature fuel gas. The burner generally comprises an injector, a combustion chamber body and a throat, wherein an oxidant and a fuel are injected, atomized and mixed by the injector, then the oxidant and the fuel start to burn on the ground at a certain distance from an injection surface, and the total temperature is about 2450K under the conditions of different Mach numbers, different total temperatures and Mach number Ma 8. This places severe demands on the thermal protection of the combustion chamber body.
The combustion chamber body of the existing rocket engine and high heat flux density combustion device adopts a corrugated plate structure, a milled groove structure and the like, and figures 1a and 1b show a corrugated plate type cooling structure which comprises an inner cylinder 01, an outer cylinder 02 and a corrugated plate 03 arranged between the inner cylinder 01 and the outer cylinder 02, wherein the corrugated plate 03 is in brazed connection with the inner cylinder 01 and the outer cylinder 02, and a brazed surface 04 is formed at the brazed connection part; fig. 2a and 2b show a groove milling type cooling structure, which comprises an inner cylinder 01, an outer cylinder 02 and a plurality of rib plates 05, wherein the outer end surface and the inner end surface of each rib plate 05 are respectively connected with the inner wall of the outer cylinder 02 and the outer wall of the inner cylinder 01 by brazing, a brazing surface 04 is formed at the brazing connection position, and the plurality of rib plates 05 are uniformly distributed along the circumferential direction.
The body parts of the combustion chamber are connected by brazing, so that the welding quality is poor in detection due to the problems of uniformity of laying of brazing filler metal and the like during brazing connection, and the risk of cavity stringing and the like due to insufficient welding and flowing of the brazing filler metal is caused, so that the structural part is easy to ablate in places with partial cooling which is not in place, and even disastrous problems are caused. And the tolerance of the brazing gap is closely related to the characteristics of the brazing filler metal and the experience of designers and processing personnel, peripheral equipment such as a brazing furnace, a vacuum box and the like is required for the whole processing, the system matching is complex, the cost is high, and the yield can be gradually improved only through a large number of tests.
The high-temperature gas generating device for the ground test has the same function as the rocket engine combustion chamber body part, but has different requirements, ground test facilities require repeated use, and the rocket engine has the weight requirement and only ensures that the single use requirement is met. Therefore, the ground combustion device needs to ensure that each welding line is reliably welded in the body processing process, each cooling channel needs to be capable of bearing pressure and cooling in place, the long service life and the reusability of the test bed can be ensured, and the cost controllability and the production period need to be ensured.
Disclosure of Invention
The invention provides a cavity-crossing-preventing high-temperature gas generating device body and a processing method thereof, and aims to solve the technical problems that the existing high-temperature gas generating device body for ground test is in a brazing connection mode, and has low welding quality, low welding reliability and high cost.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the utility model provides a prevent cluster chamber high temperature gas generation device body portion which characterized in that: the body part comprises a body part body with a cylindrical structure, a plurality of grooves which are axially arranged on the outer wall of the body part body and are uniformly distributed on the circumference, and a strip-shaped cover plate which is welded on the outer wall of the body part body in a welding mode and covers each groove;
the gap between two adjacent strip-shaped cover plates is filled by adopting a welding mode.
Further, the section of the strip-shaped cover plate is trapezoidal.
Meanwhile, the invention also provides a processing method of the cavity-crossing-preventing high-temperature gas generating device body, which is characterized by comprising the following steps of:
1) processing a cylindrical forging piece, and axially drilling the forging piece to form a cylindrical structure;
2) processing the outer diameter of the cylindrical structure, indexing the excircle of the cylindrical structure according to the number of grooves to be processed, and milling the grooves at the indexing positions;
3) processing the strip-shaped cover plates with corresponding quantity and length and width according to the quantity and length and width of the grooves to be processed, and processing the corresponding height of the strip-shaped cover plates according to the difference between the required outer diameter of the body part and the outer diameter of the processed cylindrical structure;
4) welding the strip-shaped cover plate on the corresponding groove;
5) welding gaps between adjacent strip-shaped cover plates for multiple times until the gaps between all the cover plates are filled with the welding flux to form a cylindrical body blank;
6) annealing the body blank after welding;
7) and (4) after the annealing is finished, machining the outer circle and the inner circle of the body blank to the required size to obtain the body.
Further, in the step 2), an even number of grooves are formed, and the groove milling process adopts a symmetrical groove milling process.
Further, the symmetrical processing and groove milling process specifically comprises the following steps:
a) milling a groove A according to the feeding amount, and then milling an groove A' symmetrical to the groove A; then milling a groove B adjacent to the groove A, and then milling a groove B' symmetrical to the groove B; and so on until the processing of the whole circle of grooves is finished;
b) increasing the feeding amount, and repeatedly executing the step a);
c) and repeating the step b) until the required groove depth of the groove 11 is reached.
Further, in the step a) and the step b), the feeding amount is less than or equal to 0.2mm, and the closer to the center of the cylindrical structure, the smaller the feeding amount.
Further, in the step 3), a linear cutting method is adopted to process the strip-shaped cover plate, and the section of the strip-shaped cover plate is trapezoidal.
Further, the step 4) is specifically as follows: and (c) fixing the end parts of the strip-shaped cover plates on the corresponding grooves in a spot welding mode, wherein the installation sequence of the strip-shaped cover plates adopts the method which is the same as the groove processing sequence in the step a).
Further, the step 5) is as follows:
5.1) backing welding the gap I between any two adjacent strip-shaped cover plates, and then backing welding the gap I' symmetrical to the gap I; then backing welding is carried out on a gap II adjacent to the gap I, and backing welding is carried out on a gap II' symmetrical to the gap II; and so on until the backing welding of the whole circle of gaps is completed;
5.2) recycling the step of the step 5.1) until the gap between the adjacent strip-shaped cover plates reaches the required filling thickness to form the cylindrical body blank.
Further, in the step 1), the outer diameter of the forged piece is 2-3 mm larger than the required outer diameter of the body, and the axial length of the forged piece is 20mm or more than 20mm larger than the required length of the body;
step A) is also included between step 3) and step 4): solid bars are arranged in the cylindrical structure in a penetrating way; in the step 5), the thickness of the welding seam welded each time is less than or equal to 1 mm.
Compared with the prior art, the invention has the advantages that:
1. the body part and the processing method adopt a common welding technology, avoid the existing brazing connection mode, effectively reduce the problem of welding quality caused by brazing, simplify processing supporting facilities, reduce the processing cost, improve the overall strength and rigidity of a processed part and shorten the processing period.
2. According to the invention, the groove is formed in the body part body, the strip-shaped cover plate covers the groove in a welding mode, the cavity-crossing ablation risk caused by the brazing quality can be effectively avoided, the welding process is simplified, the production cost is reduced, the yield of the body part production is improved, and the welding quality and the welding reliability are high.
3. The groove processing of the invention adopts a symmetrical groove milling processing technology, can effectively control the residual stress and the deformation in the processing process, simultaneously ensures the integral rigidity of the structural member in the processing process, and prevents the processing failure caused by the deformation of raw materials in the processing process.
Drawings
FIG. 1a is a schematic view of a conventional combustion chamber body adopting a corrugated plate type cooling structure;
FIG. 1b is a partial cross-sectional view of FIG. 1 a;
FIG. 2a is a schematic view of a conventional combustion chamber body employing a slot-milled cooling structure;
FIG. 2b is a partial cross-sectional view of FIG. 2 a;
FIG. 3 is a schematic diagram of a cross-sectional structure of a body of the cavity-crossing-preventing high-temperature gas generator (a welding structure between strip-shaped cover plates is not shown);
FIG. 4 is a schematic diagram of a transverse half-section structure of a body of the anti-cross-cavity high-temperature gas generating device (a welding structure between strip-shaped cover plates is not shown, and a half groove is shown in a body of the body);
FIG. 5 is an enlarged partial schematic view of FIG. 4;
FIG. 6 is a process diagram of groove milling in the method for processing the body of the anti-cross-cavity high-temperature gas generation device according to the invention;
FIG. 7 is a process diagram of welding a strip cover plate in the method for processing the body of the anti-cross-cavity high-temperature gas generating device of the invention;
in the figures, the reference numerals are as follows:
01-inner cylinder, 02-outer cylinder, 03-corrugated plate, 04-brazing surface and 05-ribbed plate;
1-body part body, 11-groove and 2-strip cover plate.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
As shown in fig. 3 to 5, the cavity-crossing-preventing high-temperature gas generating device body part comprises a body part body 1 with a cylindrical structure and a plurality of strip-shaped cover plates 2, wherein a plurality of grooves 11 are uniformly distributed on the periphery of the outer wall of the body part body 1 along the axial direction, the width of the lower bottom surfaces of the strip-shaped cover plates 2 is larger than that of the grooves 11, the strip-shaped cover plates 2 are respectively welded on the outer wall of the body part body 1 in a welding mode and cover the grooves 11, and the strip-shaped cover plates 2 are uniformly distributed along the circumferential direction; the gap between two adjacent strip-shaped cover plates 2 is filled by adopting a welding mode.
The final structure of the body part is a milling groove type interlayer water cooling structure, the well-known in the industry is combined, the rib height Lh1, the rib width Lk1, the groove depth dh1 (the groove depth and the rib height are the same in size) and the groove width dk1 of a milling groove are obtained by calculation according to the temperature T of a combustion chamber, the heat flow density h and the cooling water flow Qh, the inner wall thickness d is obtained, meanwhile, the inner diameter phi d1 and the top diameter phi d2 of the combustion chamber are obtained by calculation according to the parameters such as the total flow Qm of high-temperature gas, the residence time T of gas, the characteristic length L, the characteristic speed V and the like, and the outer diameter phi d3 of the combustion chamber is obtained by calculation according to the strength.
The number Sl of ribs is PI ═ Φ d2/(Lh1+ dk1), where PI is the circumference ratio, i.e., PI;
the number of grooves Sc is equal to the number of ribs Sl.
The invention provides a high-reliability and low-cost combustion chamber body part processing method, which aims to solve the problems of welding quality, welding reliability, low-cost production, maintainability, replaceability and the like of a high-temperature gas generating device body part for a ground test. The method can effectively avoid the risk of cavity cluster ablation caused by brazing quality, simplify the welding process, reduce the production cost and improve the yield of body production.
The detailed processing flow of the high-temperature gas generation device body part with the cavity crossing prevention function is as follows:
1) in order to ensure the tissue density, a forging piece with a cylindrical outline is processed by a forging and pressing forming process, the outer diameter of the forging piece is larger than phi d2, the machining allowance is ensured to be 2-3 mm, and the axial length allowance is not less than 20 mm;
2) drilling the forged piece along the axial direction to form a cylindrical structure, wherein the diameter phi d of the drilled hole needs to be smaller than phi d 1; meanwhile, the machining allowance is required to be not less than 20mm, and if the outer diameter of the forged piece is less than 20mm, the machining allowance of the step can be ignored;
3) turning the outer diameter of the cylindrical structure forging piece to phi d2, indexing the excircle of the cylindrical structure according to the number of the grooves 11 to be processed, and making an index line;
4) milling a groove 11 at each index line position, and feeding along the axial direction by adopting a milling cutter smaller than phi dk 1;
the number of the grooves 11 is even, and a symmetrical groove milling process is adopted when the grooves 11 are milled, and the process specifically comprises the following steps:
a) as shown in fig. 6, firstly milling a cutter to form a groove A, adjusting the position opposite to the groove A (the position symmetrical to the groove A), then milling a cutter to form a groove A ', then clockwise advancing a groove to mill a cutter to form a groove B, then adjusting the position opposite to the groove B (the position symmetrical to the groove B), and then milling a cutter to form a groove B'; the steps are repeated in a similar manner, and the groove-by-groove processing is carried out around the circumferential direction until the processing of the circumferential whole circle of the groove 11 is completed;
b) increasing the feed amount of the milling cutter along the radial direction, and repeatedly executing the step a);
c) repeating the step b), wherein the groove depth is increased along with the increase of the circumferential turns until the required groove depth phi d2-2 & dh1 of the groove 11 is reached, as shown in fig. 6;
the groove (groove) milling is processed gradually according to a certain feeding amount, the feeding amount is adjusted to move by one circle after one circle is milled, the processing is repeated until the requirement is met, the feeding amount in the radial direction is not more than 0.2mm each time, and the feeding amount is smaller as the groove (groove) is closer to the center of the cylindrical structure.
5) Processing the strip-shaped cover plates 2 with corresponding quantity and length and width according to the quantity and length and width of the grooves 11 to be processed, and processing the corresponding height and size of the strip-shaped cover plates 2 according to the difference between the required outer diameter of the body and the outer diameter of the tubular structure after finish machining; processing the strip-shaped cover plate 2 by adopting a linear cutting method, wherein the strip-shaped cover plate 2 adopts a structure with a trapezoidal cross section, the diameter of an upper top circular arc of the strip-shaped cover plate 2 is larger than phi d3, the processing allowance is not smaller than 0.5mm, and the diameter of a lower bottom circular arc of the strip-shaped cover plate 2 is phi d2, and the strip-shaped cover plate is directly in place;
6) the strip-shaped cover plates 2 are welded on the forged piece after the groove milling, namely the strip-shaped cover plates 2 are in one-to-one correspondence and are covered on each groove 11 in a welding mode, a method (symmetrical installation process) consistent with the groove milling processing sequence is adopted during welding of the strip-shaped cover plates 2, namely after one welding seam of one strip-shaped cover plate 2 is welded, the strip-shaped cover plate 2 is welded to the opposite position along the circumference, and then the next group of two symmetrical strip-shaped cover plates 2 are welded along clockwise (or anticlockwise) advancing.
In the embodiment, an argon arc welding mode is adopted, two end surfaces and the middle of the strip-shaped cover plates 2 are connected in a segmented spot welding mode for the first time during welding, and each strip-shaped cover plate 2 is fixed firstly; when the strip-shaped cover plate is welded, the cover plate is fixed by electric welding, then the cover plate is symmetrically welded one by one, the welding height is controlled, and the cover plate is formed by multiple times of welding, so that the uniform thermal deformation can be ensured;
7) as shown in fig. 7, the middle welding seams of every two strip-shaped cover plates 2 are subjected to sectional backing welding, one welding seam is welded, the other welding seam is symmetrically welded, and thus the welding seams are welded one by one along the circumferential direction; the method specifically comprises the following steps: backing welding is carried out on a gap I between any two adjacent strip-shaped cover plates 2, and then backing welding is carried out on a gap I' symmetrical to the gap I; then backing welding is carried out on a gap II adjacent to the gap I, and backing welding is carried out on a gap II' symmetrical to the gap II; and so on until the backing welding of the whole circle of gaps is completed; the thickness of the welding seam is controlled not to exceed 1mm every time, and the welding seam needing to be welded is filled for multiple times, namely, the gap between the adjacent strip-shaped cover plates 2 reaches the required filling thickness, and a cylindrical body blank is formed.
8) Annealing the body blank after welding;
9) after the annealing is finished, the outer circle and the inner circle of the body part blank are machined to required sizes to obtain a body part;
10) processing the inner circle to phi d1, and carrying out integral acid pickling and passivation;
11) finally welding the front end face flange and the rear end face flange, pickling and passivating the final welding line;
12) and carrying out a hydraulic strength test on the welding seam, wherein the pressure is not lower than 2 MPa.
In the welding process, a solid bar with the diameter slightly smaller than phi d can be penetrated through the center of the hole of the tubular structure forging piece, and the forging piece can rotate on the bar, so that deformation caused by welding can be avoided.
The processing method of the embodiment adopts a common argon arc welding technology, avoids the existing brazing connection mode, can effectively reduce the problem of welding quality caused by brazing, and simultaneously reduces the processing cost, simplifies processing supporting facilities and improves the overall strength and rigidity of a processed part.
In the existing brazing process, along with the increase of the size of a machined part, the required vacuum brazing furnace is larger, and the cost is greatly increased; the body part prepared by the processing method of the embodiment is not limited by size. The cavity-crossing-preventing high-temperature gas generating device body processed and obtained by the method has reliable overall quality, good process, low cost and high yield, and can meet the use requirements.
The above description is only for the preferred embodiment of the present invention and does not limit the technical solution of the present invention, and any modifications made by those skilled in the art based on the main technical idea of the present invention belong to the technical scope of the present invention.
Claims (10)
1. The utility model provides a prevent cluster chamber high temperature gas generation device body portion which characterized in that: the body part comprises a body part body (1) with a cylindrical structure, a plurality of grooves (11) which are axially formed in the outer wall of the body part body (1) and are uniformly distributed on the circumference, and strip-shaped cover plates (2) which are welded on the outer wall of the body part body (1) in a welding mode and cover each groove (11);
the gap between two adjacent strip-shaped cover plates (2) is filled by adopting a welding mode.
2. The anti-cross cavity high-temperature gas generating device body part according to claim 1, characterized in that: the section of the strip-shaped cover plate (2) is trapezoidal.
3. A processing method of a cavity-crossing-preventing high-temperature gas generating device body is characterized by comprising the following steps:
1) processing a cylindrical forging piece, and axially drilling the forging piece to form a cylindrical structure;
2) processing the outer diameter of the cylindrical structure, indexing the outer circle of the cylindrical structure according to the number of the grooves (11) to be processed, and milling the grooves (11) at the indexing positions;
3) processing the strip-shaped cover plates (2) with corresponding quantity and length and width according to the quantity and length and width of the grooves (11) to be processed, and processing the corresponding height and size of the strip-shaped cover plates (2) according to the difference between the required outer diameter of the body and the outer diameter of the processed cylindrical structure;
4) welding the strip-shaped cover plate (2) on the corresponding groove (11);
5) welding gaps between adjacent strip-shaped cover plates (2) for multiple times until the gaps between all the cover plates are filled with solder to form cylindrical body blanks;
6) annealing the body blank after welding;
7) and (4) after the annealing is finished, machining the outer circle and the inner circle of the body blank to the required size to obtain the body.
4. The method for processing the cavity-crossing-preventing high-temperature gas generating device body part according to claim 3, characterized in that: in the step 2), the number of the grooves (11) is even, and the milling grooves (11) adopt a symmetrical groove milling process.
5. The method for processing the body part of the anti-cross cavity high-temperature gas generation device according to claim 4, wherein the symmetrical processing and groove milling process specifically comprises the following steps:
a) milling a groove A according to the feeding amount, and then milling an groove A' symmetrical to the groove A; then milling a groove B adjacent to the groove A, and then milling a groove B' symmetrical to the groove B; the process is repeated until the whole circle of the groove (11) is processed;
b) increasing the feeding amount, and repeatedly executing the step a);
c) and repeating the step b) until the required groove depth of the groove (11) is achieved.
6. The method for processing the cavity-crossing-preventing high-temperature gas generating device body part according to claim 5, characterized in that: in the step a) and the step b), the feeding amount is less than or equal to 0.2mm, and the closer to the center of the cylindrical structure, the smaller the feeding amount.
7. The method for processing the cavity-crossing-preventing high-temperature gas generating device body part according to claim 6, characterized in that: in the step 3), a linear cutting method is adopted to process the strip-shaped cover plate (2), and the section of the strip-shaped cover plate (2) is trapezoidal.
8. The processing method for the cavity-crossing-preventing high-temperature gas generating device body part according to claim 7, wherein the step 4) is specifically as follows: and (b) fixing the end parts of the strip-shaped cover plates (2) on the corresponding grooves (11) in a spot welding mode, wherein the installation sequence of the strip-shaped cover plates (2) adopts the same method as the processing sequence of the grooves (11) in the step a).
9. The method for processing the cavity-crossing-preventing high-temperature gas generating device body part according to claim 8, wherein the step 5) is as follows:
5.1) backing welding a gap I between any two adjacent strip-shaped cover plates (2), and then backing welding a gap I' symmetrical to the gap I; then backing welding is carried out on a gap II adjacent to the gap I, and backing welding is carried out on a gap II' symmetrical to the gap II; and so on until the backing welding of the whole circle of gaps is completed;
5.2) the step of the step 5.1) is repeatedly utilized until the gap between the adjacent strip-shaped cover plates (2) reaches the required filling thickness, and a cylindrical body blank is formed.
10. The method for processing the cavity-crossing-preventing high-temperature gas generating device body part according to claim 9, characterized in that: in the step 1), the outer diameter of the forged piece is 2-3 mm larger than the required outer diameter of the body, and the axial length of the forged piece is 20mm or more than 20mm larger than the required length of the body;
step A) is also included between step 3) and step 4): solid bars are arranged in the cylindrical structure in a penetrating way;
in the step 5), the thickness of the welding seam welded each time is less than or equal to 1 mm.
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| CN109079322A (en) * | 2018-07-11 | 2018-12-25 | 陕西蓝箭航天技术有限公司 | The engine jet pipe preparation method of space launch vehicle |
| CN209724523U (en) * | 2019-03-13 | 2019-12-03 | 蓝箭航天技术有限公司 | A kind of thrust chamber's structure |
| CN111015091A (en) * | 2019-11-26 | 2020-04-17 | 西安远航真空钎焊技术有限公司 | Welding method of covered spray pipe |
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2021
- 2021-04-15 CN CN202110405485.2A patent/CN113172265A/en active Pending
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| CN109079322A (en) * | 2018-07-11 | 2018-12-25 | 陕西蓝箭航天技术有限公司 | The engine jet pipe preparation method of space launch vehicle |
| CN209724523U (en) * | 2019-03-13 | 2019-12-03 | 蓝箭航天技术有限公司 | A kind of thrust chamber's structure |
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