CN114871676A - Welding fixture for mounting seat on wall surface of combustion chamber casing and welding deformation control method - Google Patents
Welding fixture for mounting seat on wall surface of combustion chamber casing and welding deformation control method Download PDFInfo
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- CN114871676A CN114871676A CN202210660894.1A CN202210660894A CN114871676A CN 114871676 A CN114871676 A CN 114871676A CN 202210660894 A CN202210660894 A CN 202210660894A CN 114871676 A CN114871676 A CN 114871676A
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- 238000003466 welding Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002485 combustion reaction Methods 0.000 title claims description 35
- 238000003825 pressing Methods 0.000 claims abstract description 48
- 230000006835 compression Effects 0.000 claims description 20
- 238000007906 compression Methods 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000001788 irregular Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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Classifications
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses a method and a fixture for controlling welding dent deformation when a mounting seat is welded after holes are formed on the surface of a typical annular thin-wall casing shell in the field of aerospace machining. The clamp provided by the invention adopts the tapered wedge mechanism to convert the longitudinal movement of the pressing block into the transverse movement of the expansion block, and realizes the movement self-locking after the expansion block is tightly pushed through the friction between the contact surfaces of the tapered wedges, thereby achieving the purpose of resisting welding deformation. The automatic reset of the unloaded expansion block is realized through the spring on the air inlet pipe. By means of the point-to-point distributed air inlet pipe, the using amount of shielding gas during welding is reduced, the utilization rate of the shielding gas is improved, and the welding quality of the back of a welding seam is improved.
Description
Technical Field
The invention relates to the technical field of welding of annular thin-wall casings in machining production in the field of aerospace, in particular to a welding fixture for wall surface mounting seats of combustion chambers and a welding deformation control method.
Background
In a structural system of an aerospace engine, a large number of annular thin-wall casings (such as combustion chamber casings) which are similar to those shown in fig. 1 and play a role in bearing force exist, a certain section or the whole of each casing is a cylindrical or conical shell made of a metal plate through a drawing, spinning or bulging process, regular or irregular holes are regularly formed in the surface of the shell, and mounting seat parts such as bosses, screw seats, connecting tube seats and the like are welded at the holes and used for mounting guide tubes, supports, igniters and sensor parts of an external system of the engine. Because the wall thickness of the shell is very thin, usually about 1mm to 2mm, the rigidity of the shell can be weak after the hole is formed in the wall surface, when parts such as a boss, a screw seat, a connecting pipe seat and the like are welded, the shell tends to be inwards sunken due to local heat concentration and melting and recrystallization of base metal, when the hole is not uniform, irregular concave-convex buckling deformation can occur to the whole shell due to nonuniform heating and deformation caused by welding, the structural strength of the shell is seriously reduced, and even the accurate assembly of the internal part and the external part of the machine box during subsequent processing and final assembly can not be realized due to serious deformation.
In the prior art, aiming at the welding of the type, a screw jacking type welding fixture is designed according to the position of an opening on a shell in the traditional process method, a corresponding number of upright columns are longitudinally fixed on the fixture, a transverse screw is installed on each upright column, jacking pressure is applied to parts needing to be welded by rotating the screw so as to control welding recess, and practices prove that the method and the used welding fixture have a poor effect on controlling welding deformation, the problems of loose screw and inclined upright column are frequently encountered, the recess of the shell after welding is large, and when the inner space of the shell of a casing is narrow and the number of parts needing to be welded, such as bosses, mounting seats or screw seats is large and the distribution positions are irregular, the problem of mutual interference between each upright column and the screw is frequently encountered, so that the mounting and dismounting of the fixture become extremely difficult.
Based on the problems in the production and processing processes, the invention provides the welding fixture for the casing wall surface mounting seat and the welding deformation control method.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a welding fixture for a mounting seat on the wall surface of a combustion chamber casing and a welding deformation control method, which effectively control the sinking deformation of a shell when a workpiece is welded and improve the welding efficiency and the welding quality of a product.
The above object of the present invention is achieved by the following technical solutions:
a welding fixture for a combustion chamber casing wall surface mounting seat comprises a chassis, an adapter, a hub-shaped fixing seat, an insert, a wedge-shaped expansion block and a wedge-shaped pressing block;
the hub-shaped fixing seat is fixed above the chassis through the adapter, a positioning part for clamping a combustion chamber casing is arranged on the chassis, and rectangular grooves matched with the mounting seat workpieces to be welded one by one are formed in the periphery of the hub-shaped fixing seat;
the wedge expanding block and the wedge pressing block are installed in the rectangular groove, the wedge pressing block is located on the inner end side of the rectangular groove, the wedge expanding block is located on the outer end side of the rectangular groove, the wedge expanding block is in mutual contact and matching with a wedge face of the wedge pressing block, an insert is embedded and fixed on the outer side wall of the wedge expanding block, the working face of the outer side wall of the insert is matched with the shape of a mounting seat to be welded, the wedge pressing block drives the wedge expanding block to extrude outwards in the radial direction, and the insert on the outer wall of the wedge expanding block is abutted to the inner side of the wall surface mounting seat of the combustion chamber casing.
By adopting the technical scheme, when the fixture is used for welding a workpiece, after the workpiece to be welded is clamped on the fixture, external pressure is applied to enable the wedge-shaped pressing block to move downwards along the longitudinal direction, the wedge surface on the wedge-shaped pressing block pushes the wedge-shaped expansion block to move transversely along the radial direction of the workpiece, and finally an expanding jacking acting force is applied to the workpiece to be welded on the wall surface of the workpiece through the insert block so as to resist the concave deformation during welding.
The air inlet pipe is positioned in the hub-shaped fixed seat, one end of the air inlet pipe is provided with a flange, the other end of the air inlet pipe is sleeved with a compression spring, one end of the compression spring is abutted against the end face of the flange, and the other end of the compression spring is abutted against the inner wall of the hub-shaped fixed seat;
the inner wall of the hub-shaped fixing seat is provided with a first through hole penetrating through the rectangular groove, the wedge-shaped pressing block is provided with a second through hole, one end of the air inlet pipe penetrating through the compression spring sequentially penetrates through the first through hole and the second through hole and then is fixed with the wedge-shaped expansion block, the insert block and the wedge-shaped expansion block are respectively provided with a groove, and each groove is communicated with an inner hole channel of the air inlet pipe to form a protection gas channel matched with a welding line of a workpiece of the mounting seat to be welded.
Through adopting above-mentioned technical scheme, when the wedge briquetting upwards pulled, the wedge expanding block was automatic retreated under compression spring's effect, realized the separation of anchor clamps and work piece and dismantled. The insert and the wedge-shaped expansion block are both provided with annular grooves, and each groove is communicated with an inner hole channel of the air inlet pipe to form a protective air channel.
The bottom end of the mandrel is fixed on the chassis, and the top end of the mandrel is connected with the nut;
the adapter comprises an upper mounting plate, a lower mounting plate and a central sleeve, wherein the upper mounting plate and the lower mounting plate are respectively fixed at two ends of the central sleeve, the central sleeve is sleeved in the core shaft, and the lower mounting plate is angularly positioned through a first positioning pin arranged on the chassis;
the bottom of the hub-shaped fixing seat is provided with a center hole, the hub-shaped fixing seat is sleeved on the mandrel through the center hole and is angularly positioned with the upper mounting plate of the adapter through the second positioning pin, and the top end of the mandrel penetrates through the center hole and then is in threaded connection with the nut so as to lock and fix the hub-shaped fixing seat. The setting of dabber to make chassis, adapter and wheel hub form fixing base three axis collineation, be convenient for fix a position.
Furthermore, an unloading screw is fixed at the top of the wedge-shaped pressing block, so that the wedge-shaped pressing block is convenient to unload.
Furthermore, the positioning piece is arranged to be a pressing plate, a positioning pin or a screw, so that the combustion chamber casing is positioned and installed on the chassis.
The welding deformation control method for the combustion chamber casing wall surface mounting seat comprises the following steps:
a: clamping a combustion chamber casing on a chassis through a positioning piece;
b: a mandrel is arranged on the chassis, the mandrel is vertically fixed in the center of the chassis, and the bottom of the mandrel is fixed on the chassis;
c: installing an adapter, sleeving a central sleeve of the adapter into the mandrel, and performing angular positioning through a first positioning pin arranged on the chassis;
d: preassembling a hub-shaped fixed seat, and respectively assembling a wedge-shaped expansion block, a wedge-shaped pressing block, an air inlet pipe, a compression spring and an insert at each rectangular groove to form a component;
e: fixing the hub-shaped fixing seat which is preassembled on the top of the adapter, sleeving the central hole on the mandrel, performing angular positioning on the hub and the adapter by using a positioning pin II, and screwing a nut to fix the hub-shaped fixing seat;
applying external pressure to enable the wedge-shaped pressing block to move downwards along the longitudinal direction, pushing the wedge-shaped expansion block to move transversely along the radial direction of the workpiece by an inclined wedge surface on the wedge-shaped pressing block, and applying an expanding jacking acting force to the workpiece of the mounting seat to be welded on the wall surface of the combustion chamber casing through the insert block so as to resist the concave deformation during welding and realize the control of welding deformation;
g, welding a workpiece of the mounting seat, introducing inert gas into the gas inlet pipe, and protecting the welding seam;
h, after welding is finished, applying a longitudinal tension to the wedge-shaped pressing block, automatically retreating the wedge-shaped expanding block under the action of a compression spring, and separating the insert from the combustion chamber casing, thus the combustion chamber casing can be disassembled.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the adapter is formed by welding an upper mounting plate, a lower mounting plate, a central sleeve and a reinforcing rib, is sleeved in the mandrel and is positioned angularly by a first positioning pin arranged on the chassis; the periphery of the hub-shaped fixed seat is provided with a corresponding number of rectangular grooves according to the actual workpiece to be welded, the bottom of the hub-shaped fixed seat is provided with a central hole, the hub-shaped fixed seat is sleeved on the mandrel through the central hole, and the central hole is angularly positioned with the adapter by the second positioning pin, so that all parts on the fixture and the workpiece to be welded are accurately positioned in the circumferential direction.
2. The clamp adopts the tapered wedge mechanism to convert the longitudinal movement of the pressing block into the transverse movement of the expansion block, and realizes the movement self-locking of the expansion block after being pushed tightly through the friction between the contact surfaces of the tapered wedge and the inclined wedge, thereby achieving the purpose of resisting welding deformation.
3. The air inlet pipe is a point-to-point protective gas channel, protective gas is only applied in the width range of the welding seam to protect the welding seam, the consumption of the protective gas is reduced, and the economical efficiency is good.
4. The automatic reset of the unloaded expansion block is realized through the spring on the air inlet pipe.
Drawings
FIG. 1 is a schematic view of the combustor thin-walled casing structure of the present invention.
FIG. 2 is a schematic view of a welding fixture for a wall mount of a combustor casing according to the present invention.
Fig. 3 is an enlarged schematic view of a structure at a in fig. 2.
FIG. 4 is an exploded view of the wedge-shaped press block and wedge-shaped expansion block of the present invention.
FIG. 5 is a schematic view of the structure of the combustion casing of the present invention in assembled relation with a welding fixture.
In the figure, 1, a chassis; 2. a transfer seat; 21. an upper mounting plate; 22. a lower mounting plate; 23. reinforcing ribs; 24. a central sleeve; 3. a first positioning pin; 4. a hub-shaped fixing seat; 41. a first through hole; 42. a rectangular groove; 5. a second positioning pin; 6. a nut; 7. a mandrel; 8. an insert; 81. a first annular groove; 82. air holes; 9. a wedge-shaped expansion block; 91. a second annular groove; 10. A wedge-shaped pressing block; 101. a second through hole; 11. unloading the screw; 12. an air inlet pipe; 13. a compression spring; 14. and a positioning round table.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.
Referring to fig. 2 to 5, the welding fixture for the wall surface mounting seat of the combustion chamber casing disclosed by the invention mainly comprises a chassis 1, an adapter 2, a positioning pin 3, a hub-shaped fixing seat 4, a positioning pin 5, a nut 6, a mandrel 7, an insert 8, a wedge-shaped expansion block 9, a wedge-shaped pressing block 10, an unloading screw 11, an air inlet pipe 12, a compression spring 13 and other parts.
The chassis 1 of the clamp is used for clamping and positioning a processed workpiece (such as a combustion chamber casing), and positioning pieces for clamping the workpiece, such as a pressing plate, a positioning pin or a screw, can be additionally arranged on the chassis 1 according to actual needs. Referring to fig. 5, the combustion chamber casing and the chassis are positioned by the positioning boss 14, and the outer side wall of the positioning boss 14 abuts against the inner wall of the bottom end of the combustion chamber casing.
The lower section of the mandrel 7 is a polished rod, and the upper section of the mandrel 7 is a screw rod and is fixed on the chassis 1; the adapter 2 is formed by welding an upper mounting plate (21) and a lower mounting plate (22), a central sleeve 24 and a reinforcing rib 23, is sleeved in the mandrel 7 and is positioned angularly by a positioning pin I3 arranged on the chassis 1; the periphery of the hub-shaped fixed seat 4 is provided with a corresponding number of rectangular grooves 42 according to the actual workpiece of the mounting seat to be welded, the bottom of the hub-shaped fixed seat is provided with a central hole, the hub-shaped fixed seat is sleeved on the mandrel 7 through the central hole and is angularly positioned by the positioning pin II 5 and the adapter 2, and therefore accurate positioning of all parts on the fixture and the workpiece of the mounting seat to be welded in the circumferential direction is achieved.
The insert 8 is embedded and fixed on the wedge-shaped expansion block 9, and the wedge-shaped expansion block 9 and the wedge-shaped pressing block 10 are contacted with each other and are arranged in the rectangular groove 42 of the hub-shaped fixed seat 4; one end of the air inlet pipe 12 is provided with a thread, the other end of the air inlet pipe is provided with a flange, and the compressed spring 13 is sleeved in from the threaded end and then passes through holes in the hub-shaped fixed seat 4 and the wedge-shaped pressing block 10 to be fixed with the wedge-shaped expansion block 9 through the thread; the hub-like holder 4, equipped with the insert 8, the wedge-shaped expansion 9, the wedge-shaped pressure block 10, the unloading screw 11, the inlet pipe 12, the compression spring 13, forms one part. The inclined wedge surface inclination angles of the wedge-shaped expansion block 9 and the wedge-shaped pressing block 10 are designed according to the friction angle principle, and the self-locking wedge has a self-locking function.
Specifically, a first through hole 41 penetrating through the rectangular groove is formed in the inner wall of the hub-shaped fixing seat 4, a second through hole 101 is formed in the wedge-shaped pressing block 10, and one end, penetrating through the compression spring 13, of the air inlet pipe 12 sequentially penetrates through the first through hole 41 and the second through hole 101 and then is fixed with the wedge-shaped expansion block 9. The second through hole 101 is disposed on the wedge-shaped pressing block 10, should not affect the longitudinal displacement of the wedge-shaped pressing block 10, and may be configured as a longitudinal kidney-shaped hole, or a U-shaped notch with an open bottom.
The working surface of the insert 8 is subjected to profiling machining according to the shape of a workpiece to be welded, good contact between the working surface and the workpiece is guaranteed, annular grooves are machined in the insert 8 and the wedge-shaped expansion block 9, and the grooves are communicated with an inner hole channel of the air inlet pipe 12 to form a shielding air channel. By means of the point-to-point distributed air inlet pipe, the using amount of shielding gas during welding is reduced, the utilization rate of the shielding gas is improved, and the welding quality of the back of a welding seam is improved. Specifically, an annular groove I81 is processed on the insert 8, and an annular groove II 91 is processed on the wedge-shaped expansion block 9; a plurality of air holes 82 used for being communicated with the second annular groove 91 are distributed on the bottom wall of the first annular groove 81 at intervals, and the second annular groove 91 is communicated with an air inlet pipe.
The implementation principle of the embodiment is as follows: when the fixture is used for welding a workpiece, after the workpiece to be welded (a combustion chamber casing) is clamped on the fixture, the nut 6 is screwed to fix the hub-shaped fixed seat 4 and cannot move, then external pressure is applied to enable the wedge-shaped pressing block 10 to move downwards along the longitudinal direction, the inclined wedge surface on the wedge-shaped pressing block 10 pushes the wedge-shaped expansion block 9 to move transversely along the radial direction of the workpiece, finally, an expanding jacking acting force is applied to the workpiece to be welded (such as a boss, a screw seat, a pipe seat and the like) on the wall surface of the workpiece of the combustion chamber casing through the insert 8 to resist the concave deformation during welding, due to the self-locking effect of the inclined wedge surface between the wedge-shaped expansion block 9 and the wedge-shaped pressing block 10, no matter how large the pressure is applied to the wedge-shaped expansion block 9 due to the concave deformation during welding of the workpiece, the wedge-shaped expansion block 9 cannot retreat, and the workpiece to be tightly propped against the correct welding position all the time, the control of welding deformation is realized. After welding, longitudinal tension is applied to the wedge-shaped pressing block 10 through the unloading screw 11, self-locking between the wedge-shaped expansion block 9 and the wedge-shaped pressing block 10 is released, the wedge-shaped expansion block 9 automatically retreats under the action of the compression spring 13 after the wedge-shaped pressing block 10 is taken out, and unloading and separation and disassembly of the clamp and the combustion chamber case workpiece can be easily completed. The air inlet pipe 12 is a point-to-point protective gas channel, and protective gas is only applied in the width range of the welding seam to protect the welding seam, so that the consumption of the protective gas is reduced, and the economical efficiency is good.
Example 2
The welding deformation control method for the combustion chamber casing wall surface mounting seat adopts the welding fixture, and comprises the following steps:
a: a combustion chamber casing is clamped on the chassis 1 through a positioning piece and is fixed on the chassis through a pressing plate, a positioning pin or a screw.
B: the base plate 1 is provided with a mandrel 7, the mandrel 7 is vertically and coaxially fixed in the center of the base plate 1, the bottom of the mandrel 7 is fixed on the base plate 1, and the mandrel 7 and the base plate 1 can be connected in a pin or screw fixing mode.
C: the adapter 2 is installed, a central sleeve of the adapter 2 is sleeved into the mandrel and is positioned angularly through a positioning pin I3 installed on the chassis 1, the central sleeve is attached to and sleeved outside the mandrel 7, and the central sleeve and the mandrel are coaxial.
D: the hub-shaped fixed seat 4 is preassembled, and the wedge-shaped expansion block 9, the wedge-shaped pressing block 10, the air inlet pipe 12, the compression spring 13 and the insert 8 are assembled at each rectangular groove respectively to form a component.
E: fixing the hub-shaped fixed seat 4 which is preassembled on the top of the adapter seat 2, sleeving the central hole on the mandrel 7, performing angular positioning on the central hole and the adapter seat 2 by using a positioning pin II 5, and screwing the nut 6 to fix the hub-shaped fixed seat 4; therefore, accurate positioning of all parts on the clamp and the workpiece of the mounting seat to be welded in the circumferential direction is realized.
And F, applying external pressure to enable the wedge-shaped pressing block 10 to move downwards along the longitudinal direction, pushing the wedge-shaped expansion block 9 to move transversely along the radial direction of the workpiece by the inclined wedge surface on the wedge-shaped pressing block 10, and applying an expanding jacking acting force to the workpiece of the mounting seat to be welded on the wall surface of the combustion chamber casing through the insert 8 so as to resist the sunken deformation during welding and realize the control of welding deformation.
G, welding a workpiece of the mounting seat, introducing inert gas into the gas inlet pipe 12, and protecting the welding seam;
h, after welding is finished, applying a longitudinal tension to the wedge-shaped pressing block 10, enabling the wedge-shaped expansion block 9 to automatically retreat under the action of the compression spring 13, separating the insert 8 from the combustion chamber casing, and disassembling the combustion chamber casing.
By adopting the welding fixture for the mounting seat on the wall surface of the combustion chamber casing, the sunken deformation of the casing of the combustion chamber casing can be effectively controlled when the workpiece of the mounting seat is welded, the control of each welding site is independent, the problem of mutual interference is prevented, and the installation and the disassembly of the fixture are simple.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (6)
1. The utility model provides a combustor machine casket wall mount pad welding jig which characterized in that: the device comprises a chassis, an adapter, a hub-shaped fixed seat, an insert, a wedge-shaped expansion block and a wedge-shaped pressing block;
the hub-shaped fixing seat is fixed above the chassis through the adapter, a positioning part for clamping a combustion chamber casing is arranged on the chassis, and rectangular grooves matched with the mounting seat workpieces to be welded one by one are formed in the periphery of the hub-shaped fixing seat;
the wedge expanding block and the wedge pressing block are installed in the rectangular groove, the wedge pressing block is located on the inner end side of the rectangular groove, the wedge expanding block is located on the outer end side of the rectangular groove, the wedge expanding block is in mutual contact and matching with a wedge face of the wedge pressing block, an insert is embedded and fixed on the outer side wall of the wedge expanding block, the working face of the outer side wall of the insert is matched with the shape of a mounting seat to be welded, the wedge pressing block drives the wedge expanding block to extrude outwards in the radial direction, and the insert on the outer wall of the wedge expanding block is abutted to the inner side of the wall surface mounting seat of the combustion chamber casing.
2. The combustor casing wall mount welding fixture of claim 1, wherein: the air inlet pipe is positioned in the hub-shaped fixed seat, one end of the air inlet pipe is provided with a flange, the other end of the air inlet pipe is sleeved with a compression spring, one end of the compression spring is abutted against the end face of the flange, and the other end of the compression spring is abutted against the inner wall of the hub-shaped fixed seat;
the inner wall of the hub-shaped fixing seat is provided with a first through hole penetrating through the rectangular groove, the wedge-shaped pressing block is provided with a second through hole, one end of the air inlet pipe penetrating through the compression spring sequentially penetrates through the first through hole and the second through hole and then is fixed with the wedge-shaped expansion block, the insert block and the wedge-shaped expansion block are respectively provided with a groove, and each groove is communicated with an inner hole channel of the air inlet pipe to form a protection gas channel matched with a welding line of a workpiece of the mounting seat to be welded.
3. The combustor casing wall mount welding fixture of claim 2, wherein: the bottom end of the mandrel is fixed on the chassis, and the top end of the mandrel is connected with the nut;
the adapter comprises an upper mounting plate, a lower mounting plate and a central sleeve, wherein the upper mounting plate and the lower mounting plate are respectively fixed at two ends of the central sleeve, the central sleeve is sleeved in the core shaft, and the lower mounting plate is angularly positioned through a first positioning pin arranged on the chassis;
the bottom of the hub-shaped fixing seat is provided with a center hole, the hub-shaped fixing seat is sleeved on the mandrel through the center hole and is angularly positioned with the upper mounting plate of the adapter through the second positioning pin, and the top end of the mandrel penetrates through the center hole and then is in threaded connection with the nut so as to lock and fix the hub-shaped fixing seat.
4. The combustor casing wall mount welding fixture of claim 3, wherein: and an unloading screw is fixed at the top of the wedge-shaped pressing block.
5. The combustor casing wall mount welding fixture of claim 1, wherein: the positioning piece is arranged as a pressure plate, a positioning pin or a screw.
6. A welding deformation control method for a wall surface mounting seat of a combustor casing adopts the welding fixture of claim 3 or 4, and is characterized by comprising the following steps:
a: clamping a combustion chamber casing on a chassis through a positioning piece;
b: a mandrel is arranged on the chassis, the mandrel is vertically fixed in the center of the chassis, and the bottom of the mandrel is fixed on the chassis;
c: installing an adapter, sleeving a central sleeve of the adapter into the mandrel and performing angular positioning through a first positioning pin arranged on the chassis;
d: preassembling a hub-shaped fixed seat, and respectively assembling a wedge-shaped expansion block, a wedge-shaped pressing block, an air inlet pipe, a compression spring and an insert at each rectangular groove to form a component;
e: fixing the hub-shaped fixing seat which is preassembled on the top of the adapter, sleeving the central hole on the mandrel, performing angular positioning on the hub and the adapter by using a positioning pin II, and screwing a nut to fix the hub-shaped fixing seat;
applying external pressure to enable the wedge-shaped pressing block to move downwards along the longitudinal direction, pushing the wedge-shaped expansion block to move transversely along the radial direction of the workpiece by an inclined wedge surface on the wedge-shaped pressing block, and applying an expanding jacking acting force to the workpiece of the mounting seat to be welded on the wall surface of the combustion chamber casing through the insert block so as to resist the concave deformation during welding and realize the control of welding deformation;
g, welding a workpiece of the mounting seat, introducing inert gas into the gas inlet pipe, and protecting the welding seam;
h, after welding is finished, applying a longitudinal tension to the wedge-shaped pressing block, automatically retreating the wedge-shaped expanding block under the action of a compression spring, and separating the insert from the combustion chamber casing, thus the combustion chamber casing can be disassembled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210660894.1A CN114871676A (en) | 2022-06-13 | 2022-06-13 | Welding fixture for mounting seat on wall surface of combustion chamber casing and welding deformation control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210660894.1A CN114871676A (en) | 2022-06-13 | 2022-06-13 | Welding fixture for mounting seat on wall surface of combustion chamber casing and welding deformation control method |
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| CN114871676A true CN114871676A (en) | 2022-08-09 |
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| CN202210660894.1A Pending CN114871676A (en) | 2022-06-13 | 2022-06-13 | Welding fixture for mounting seat on wall surface of combustion chamber casing and welding deformation control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115846807A (en) * | 2023-03-01 | 2023-03-28 | 成立航空技术(成都)有限公司 | Aeroengine combustion chamber mount pad looks transversal welding set |
| CN117245196A (en) * | 2023-11-16 | 2023-12-19 | 中国空气动力研究与发展中心高速空气动力研究所 | Strain balance electron beam welding structure and welding method thereof |
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| CN107671469A (en) * | 2017-08-17 | 2018-02-09 | 武汉船用机械有限责任公司 | The welding tooling and method of a kind of gas turbine housing |
| CN107877068A (en) * | 2017-12-01 | 2018-04-06 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of device and application method for reducing large thin-wall part welding deformation |
| CN108890207A (en) * | 2018-09-10 | 2018-11-27 | 中国航发航空科技股份有限公司 | Device for aeroengine combustor buring room casing assembly positioning welding |
| CN109396724A (en) * | 2018-12-17 | 2019-03-01 | 中国航发动力股份有限公司 | A kind of engine crankcase processing support device |
| CN109986245A (en) * | 2019-04-18 | 2019-07-09 | 哈尔滨汽轮机厂有限责任公司 | A kind of pipeline group welding equipment back-pressure protection tool |
| CN111408893A (en) * | 2020-04-30 | 2020-07-14 | 中国航发哈尔滨东安发动机有限公司 | Self-centering expansion welding fixture |
| CN113894459A (en) * | 2021-11-15 | 2022-01-07 | 中国航发贵州黎阳航空动力有限公司 | Tool for integral assembly welding of outer ring assembly of engine |
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2022
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| CN106424801A (en) * | 2016-11-30 | 2017-02-22 | 武汉泛洲中越合金有限公司 | Bearing bush partition tool fixture |
| CN107671469A (en) * | 2017-08-17 | 2018-02-09 | 武汉船用机械有限责任公司 | The welding tooling and method of a kind of gas turbine housing |
| CN107877068A (en) * | 2017-12-01 | 2018-04-06 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of device and application method for reducing large thin-wall part welding deformation |
| CN108890207A (en) * | 2018-09-10 | 2018-11-27 | 中国航发航空科技股份有限公司 | Device for aeroengine combustor buring room casing assembly positioning welding |
| CN109396724A (en) * | 2018-12-17 | 2019-03-01 | 中国航发动力股份有限公司 | A kind of engine crankcase processing support device |
| CN109986245A (en) * | 2019-04-18 | 2019-07-09 | 哈尔滨汽轮机厂有限责任公司 | A kind of pipeline group welding equipment back-pressure protection tool |
| CN111408893A (en) * | 2020-04-30 | 2020-07-14 | 中国航发哈尔滨东安发动机有限公司 | Self-centering expansion welding fixture |
| CN113894459A (en) * | 2021-11-15 | 2022-01-07 | 中国航发贵州黎阳航空动力有限公司 | Tool for integral assembly welding of outer ring assembly of engine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115846807A (en) * | 2023-03-01 | 2023-03-28 | 成立航空技术(成都)有限公司 | Aeroengine combustion chamber mount pad looks transversal welding set |
| CN115846807B (en) * | 2023-03-01 | 2023-04-21 | 成立航空技术(成都)有限公司 | Intersecting line welding device for installation seat of aero-engine combustion chamber |
| CN117245196A (en) * | 2023-11-16 | 2023-12-19 | 中国空气动力研究与发展中心高速空气动力研究所 | Strain balance electron beam welding structure and welding method thereof |
| CN117245196B (en) * | 2023-11-16 | 2024-01-23 | 中国空气动力研究与发展中心高速空气动力研究所 | Strain balance electron beam welding structure and welding method thereof |
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