CN113305529A - Flexible butt joint structure and method for vertical assembly of medium-large rocket - Google Patents
Flexible butt joint structure and method for vertical assembly of medium-large rocket Download PDFInfo
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- CN113305529A CN113305529A CN202110634033.1A CN202110634033A CN113305529A CN 113305529 A CN113305529 A CN 113305529A CN 202110634033 A CN202110634033 A CN 202110634033A CN 113305529 A CN113305529 A CN 113305529A
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- lifting
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- medium
- air bag
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 210000001503 joint Anatomy 0.000 title claims abstract description 17
- 235000015842 Hesperis Nutrition 0.000 claims abstract description 14
- 235000012633 Iberis amara Nutrition 0.000 claims abstract description 14
- 239000007921 spray Substances 0.000 claims description 18
- 238000003032 molecular docking Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 230000003028 elevating effect Effects 0.000 claims 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 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
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
Abstract
A flexible butt joint structure and a method for vertical assembly of medium and large rockets comprise a moving mechanism, a lifting mechanism and a flexible platform; the lifting mechanism is arranged on the moving mechanism, the flexible platform is arranged on the lifting mechanism, and the rocket nozzle is placed on the flexible platform; the flexible platform is an air cushion bedplate or an air bag assembly, and the rocket nozzle is arranged on the air cushion bedplate or the air bag assembly. The invention has reliable safety, and flexible centering not only can reduce the stress on the connecting piece in the centering process to the maximum extent, but also can obviously improve the centering precision.
Description
Technical Field
The invention belongs to the technical field of manufacturing of solid rocket engines, and particularly relates to a vertical assembly flexible butt joint structure and method for medium and large rockets.
Background
The large and medium rockets are large in weight, and are assembled by a specially designed main body support precise assembly table in the past, the main body support assembly table comprises a plurality of separated rail type trolleys, the trolleys can move along a precise rail, and an upper fine adjustment mechanism, a lower fine adjustment mechanism, a driving wheel and a driven wheel are arranged above the trolleys to jointly support a main body; the main body can rotate clockwise or anticlockwise by the rotation of the driving wheel, so that the alignment is facilitated when the hole is assembled; the driven wheel can be subjected to radial fine adjustment so that rubber rollers on the outer edges of the driving wheel and the driven wheel can be in full contact with the rocket main body; during assembly, the segments needing to be combined are respectively arranged on the two groups of trolleys, the axes of the segments are accurately adjusted and then are butted, and finally, the segments are connected into a whole by an operator through screws. The assembling method is troublesome when products with different diameters are replaced, centering adjustment must be carefully carried out again, small differences can lead the arrow body to be unevenly stressed, a precise rail system in a factory building must be relied on, and safe and reliable disassembly and assembly can not be carried out in a field battle field outside a field room.
Disclosure of Invention
The invention aims to provide a vertical type assembling flexible butt joint structure and a vertical type assembling flexible butt joint method for medium and large rockets, and aims to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a vertical assembly flexible butt joint structure for medium and large rockets comprises a moving mechanism, a lifting mechanism and a flexible platform; the lifting mechanism is arranged on the moving mechanism, the flexible platform is arranged on the lifting mechanism, and the rocket nozzle is placed on the flexible platform;
the flexible platform is an air cushion bedplate or an air bag assembly, and the rocket nozzle is arranged on the air cushion bedplate or the air bag assembly.
Further, the moving mechanism comprises a driving steering wheel and a vehicle-carrying chassis; the plurality of driving steering wheels are arranged on the vehicle-carrying chassis.
Further, the lifting mechanism is a spiral lifting mechanism or a direct-pushing type lifting mechanism.
Further, the spiral lifting mechanism comprises a lifting stud and a driving motor; a plurality of nuts matched with the lifting studs are arranged on the moving mechanism, the lifting studs are arranged in each nut, the driving motor is arranged in the moving mechanism, and the driving motor drives the lifting studs to rotate; the top of the lifting stud is connected with a lifting platform.
Further, the direct pushing type lifting mechanism comprises an electric push rod and a guide pillar; the electric push rod is arranged on the moving mechanism, the output end of the electric push rod is connected with the lifting platform, and a plurality of guide pillars are further arranged between the moving mechanism and the lifting platform.
Furthermore, the air cushion bedplate is a plate-shaped structure capable of being inflated.
Further, the air bag assembly comprises a workbench plate and an air bag; the air bags are arranged at the top of the lifting mechanism to form an air bag group, and the top of the air bag group is provided with a working table board.
Further, a three-axis fine adjustment platform is arranged between the lifting mechanism and the flexible platform; the three-axis fine adjustment platform comprises a main frame, a table top, an X transverse moving motor, a Y longitudinal moving motor and an R rotating motor; the table top is arranged on the main frame, the X transverse moving motor, the Y longitudinal moving motor and the R rotating motor are all arranged on the frame, and the X transverse moving motor, the Y longitudinal moving motor and the R rotating motor are respectively used for controlling transverse moving, longitudinal moving and rotating of the table top.
Further, a vertical assembly flexible docking method for medium and large rockets comprises the following steps:
the moving mechanism moves the spray pipe to the position below the position to be installed;
compressed air is introduced into the air cushion bedplate or the air bag assembly, and the air cushion bedplate or the air bag assembly is arranged in the center of the table top of the three-axis fine adjustment platform;
placing the jet pipe above the air cushion bedplate or the air bag assembly, and vertically hanging the rocket body above the jet pipe;
three positioning guide bolt pins are uniformly distributed and installed in a screw hole at the bottom of the main body; starting a lifting mechanism to lift the spray pipe to a height close to the guide bolt pin;
operating the X transverse moving motor, the Y longitudinal moving motor and the R rotating motor to be aligned, then starting the lifting mechanism to continuously lift the spray pipe, and stopping after the end part of the guide bolt pin enters the mounting hole of the spray pipe flange;
restarting the lifting mechanism to lift the nozzle flange until the main body is about to contact the base flange, and stopping lifting;
and screwing the screws into the vacant screw holes of the base one by one, taking down the guide bolt pin, screwing the guide bolt pin by the screws, and finishing butt joint installation.
Compared with the prior art, the invention has the following technical effects:
the invention has low requirement on the operation site, and does not need fixed factory buildings and traveling cranes;
the invention has high flexibility of operation, and can conveniently disassemble and assemble rockets with different outer diameters;
the invention has reliable safety, flexible centering can reduce the stress on the connecting piece in the centering process to the maximum extent, and can also obviously improve the centering precision;
the invention can more efficiently finish the overhaul and upgrade of products in the field environment by using the special vertical lift truck.
Drawings
FIG. 1 is a schematic diagram of a vertical assembly air bag type flexible docking method for a medium-large rocket, which is disclosed by the invention;
FIG. 2 is a schematic view of a three-axis fine-tuning, air-cushion centering stage according to the present invention;
FIG. 3 is a schematic view of the vertical assembly process of the special erecting transport vehicle according to the present invention;
wherein:
1. driving a steering wheel; 2. a vehicle carrying chassis; a lifting stud 3; the device comprises an electric push rod 7, a lifting platform 6, a guide post 4, a working table plate 8, an air bag 5, a three-axis fine adjustment platform 9, a table surface 10, an X transverse moving motor 11, a Y longitudinal moving motor 12, an R rotating motor 13, a spray pipe 14, a rocket body 15 and an air cushion table plate 16.
Detailed Description
The invention adopts a vertical flexible butt joint assembly method for medium and large rockets, and the basic method of the invention is that a main body part to be combined is hoisted by hoisting equipment to be vertical, the height of the bottom end is slightly higher than the installation surface of a smaller part to be assembled, and the smaller part is installed on a movable centering platform with a lifting device and a flexible air bag.
The assembly equipment mainly comprises a crane and a special centering table trolley, the crane is responsible for vertical adjustment and transportation of the main body, universal wheels with brakes are mounted on the centering table trolley and can be flexibly moved and parked, the trolley is provided with lifting support legs and can be leveled and the ground clearance of the trolley can be changed, an air bag is arranged on the centering table and comprises a plurality of air chambers capable of independently adjusting pressure, a supporting plate capable of freely rotating around a vertical shaft is arranged on the upper portion of the air bag, and the supporting plate is used for bearing a part to be installed. The further improvement is that a multi-air-chamber air bag of the centering table is replaced by an air cushion platform and a three-axis fine adjustment platform, and the centering process is completely completed by means of electromechanical force. The adoption of the plane air cushion can eliminate horizontal mechanical friction resistance in the base centering process, and reduce the stress on the screw holes and the through holes in the centering process to the maximum extent.
The specific operation method comprises the following steps: firstly, introducing compressed air to an air cushion table plate, placing the air cushion table plate in the center of the table surface of the three-axis fine adjustment platform, and then cutting off the air; standing the base above the air cushion bedplate; vertically hanging the main body above the centering table of the base; three positioning guide bolt pins are uniformly distributed and installed in a screw hole at the bottom of the main body; starting a lifting motor to slowly lift the base of the centering table to a height close to the guide bolt pin; operating X, Y, R to align the motor, starting the lifting motor to slowly lift the base, and stopping lifting after the conical part at the end part of the guide bolt pin enters the mounting hole of the base flange by about 10 mm; then, the lifting motor is restarted to slowly lift the base flange until the base flange is contacted with the base flange, and then the lifting is stopped; screwing the screws into the vacant screw holes of the base one by one; taking down the guide bolt pin and screwing the guide bolt pin on the guide bolt pin by using a screw; sequentially tightening all the screws by using a pneumatic wrench with specified torque; and finally, hoisting the assembled product away by using a travelling crane.
In order to facilitate the disassembly and assembly of the field operation environment, the special vertical lift car can be matched with the vertical centering platform to complete the disassembly and assembly.
Example 1:
the air bag type flexible butt joint is vertically installed, taking the installation of the rocket body and the engine spray pipe assembly as an example.
The assembly workshop needs to be provided with a travelling crane and a special base centering table, the travelling crane is responsible for the vertical allocation and transportation of the main body, the base centering table is provided with a small-displacement lifting table, a multi-air-chamber air bag is arranged on the small-displacement lifting table, and the upper part of the air bag is provided with a supporting plate capable of freely rotating around a vertical shaft and used for fixing the spray pipe.
Fixing the spray pipe on a base support plate, pressurizing the air bag and leveling; vertically hanging the main body at a position 20cm above the spray pipe centering table; slowly lifting a spray pipe supporting plate of the centering table, and coaxially positioning by means of a positioning pin; after the main body and the connecting end face of the nozzle are basically contacted, screws are sequentially inserted into screw holes of the flange of the main body. After all the screws are recognized into the screw holes of the flange of the main body, all the screws are easily screwed up to the position about 0.5mm away from the bottom, then the main body slightly rotates in a reciprocating mode slightly, certain air pressure is applied to the expansion core, and finally the screws are sequentially screwed down one by one through a pneumatic wrench. And (4) removing the fixing piece of the fixing base, decompressing the expansion core, and finally lifting the assembled product away by using a travelling crane.
Example 2:
the air cushion platform is vertically installed in a butt joint mode, and the installation of the rocket body and the engine nozzle assembly is taken as an example.
The further improvement is that a multi-air-chamber air bag of the centering table is replaced by an air cushion platform and a three-axis fine adjustment platform, and the centering process is completely completed by means of electromechanical force. The adoption of the plane air cushion can almost have no horizontal resistance when the spray pipe is centered, and the stress on the screw hole and the through hole in the centering process is reduced to the maximum extent. However, this method requires that the air bearing plane of the platform be perpendicular to the rocket body axis.
The specific operation steps are as follows: firstly, introducing compressed air to an air cushion table plate, placing the air cushion table plate in the center of the table surface of the three-axis fine adjustment platform, and then cutting off the air; standing the spray pipe above the air cushion bedplate; vertically hanging the main body above the base centering table, wherein the bottom surface of the main body is about 20cm high from the nozzle mounting surface, and the distance between the two axial lines is less than 100 mm; three guide bolt pins made of beryllium bronze or aluminum bronze are uniformly distributed and installed in the screw hole at the bottom of the main body. Starting a lifting motor to slowly lift the spray pipe of the centering table to a height close to the guide bolt pin; operating X, Y, R to align the motor, starting the lifting motor to slowly lift the base, and stopping lifting after the conical part at the end part of the guide bolt pin enters the mounting hole of the nozzle flange by about 10 mm; opening an air cushion valve to introduce compressed air to the air cushion bedplate, restarting a lifting motor after 5s to slowly lift the nozzle flange until the nozzle flange almost contacts the main body flange, and stopping lifting; screwing the screws into the spare screw holes of the spray pipe one by one; taking down the guide bolt pin and screwing the guide bolt pin on the guide bolt pin by using a screw; sequentially tightening all the screws by using a pneumatic wrench with specified torque; and finally, hoisting the assembled product away by using a travelling crane.
Claims (9)
1. A vertical assembly flexible butt joint structure of a medium-large rocket is characterized by comprising a moving mechanism, a lifting mechanism and a flexible platform; the lifting mechanism is arranged on the moving mechanism, the flexible platform is arranged on the lifting mechanism, and the rocket nozzle is placed on the flexible platform;
the flexible platform is an air cushion bedplate (16) or an air bag assembly, and the rocket nozzle is arranged on the air cushion bedplate or the air bag assembly.
2. The vertical assembly flexible docking structure for medium and large rockets according to claim 1, wherein the moving mechanism comprises a driving steering wheel (1) and a vehicle carrying chassis (2); the plurality of driving steering wheels (1) are arranged on the vehicle-carrying chassis (2).
3. The vertical assembly flexible docking structure for medium and large rockets according to claim 1, wherein the elevating mechanism is a spiral elevating mechanism or a direct-push elevating mechanism.
4. The vertical assembly flexible butt joint structure of the medium and large rocket according to claim 3, wherein the spiral lifting mechanism comprises a lifting stud (3) and a driving motor; a plurality of nuts matched with the lifting studs (3) are arranged on the moving mechanism, each nut is internally provided with a lifting stud (3), a driving motor is arranged in the moving mechanism, and the driving motor drives the lifting studs (3) to rotate; the top of the lifting stud (3) is connected with a lifting platform (6).
5. The vertical assembly flexible butt joint structure of medium and large rockets according to claim 3, wherein the direct push type lifting mechanism comprises an electric push rod (7) and a guide post (4); the electric push rod (7) is arranged on the moving mechanism, the output end of the electric push rod (7) is connected with the lifting platform (6), and a plurality of guide columns (4) are further arranged between the moving mechanism and the lifting platform (6).
6. The vertical assembly flexible docking structure for large and medium rockets according to claim 1 wherein the air cushion deck is a plate structure capable of being inflated.
7. A medium and large rocket vertical assembly flexible docking structure according to claim 1, characterized in that the air bag module comprises a working platform plate (8) and an air bag (5); the air bags (5) are arranged at the top of the lifting mechanism to form an air bag group, and the top of the air bag group is provided with a working table plate (8).
8. The vertical type assembly flexible butt joint structure of medium and large rockets according to claim 1, wherein a three-axis fine adjustment platform (9) is further arranged between the lifting mechanism and the flexible platform; the three-axis fine adjustment platform comprises a main frame, a table top (10), an X transverse moving motor (11), a Y longitudinal moving motor (12) and an R rotating motor (13); the table top (10) is arranged on the main frame, the X transverse moving motor (11), the Y longitudinal moving motor (12) and the R rotating motor (13) are all arranged on the frame, and the X transverse moving motor (11), the Y longitudinal moving motor (12) and the R rotating motor (13) are respectively used for controlling transverse moving, longitudinal moving and rotating of the table top.
9. A vertical assembly flexible butt joint method for medium and large rockets is characterized by comprising the following steps:
the moving mechanism moves the spray pipe to the position below the position to be installed;
compressed air is introduced into the air cushion bedplate or the air bag assembly, and the air cushion bedplate or the air bag assembly is arranged in the center of the table top of the three-axis fine adjustment platform;
placing the jet pipe above the air cushion bedplate or the air bag assembly, and vertically hanging the rocket body above the jet pipe;
three positioning guide bolt pins are uniformly distributed and installed in a screw hole at the bottom of the main body; starting a lifting mechanism to lift the spray pipe to a height close to the guide bolt pin;
operating an X transverse moving motor (11), a Y longitudinal moving motor (12) and an R rotating motor (13) to align, then starting a lifting mechanism to continuously lift the spray pipe, and stopping after the end part of the guide bolt pin enters a mounting hole of a flange of the spray pipe;
restarting the lifting mechanism to lift the nozzle flange until the main body is about to contact the base flange, and stopping lifting;
and screwing the screws into the vacant screw holes of the base one by one, taking down the guide bolt pin, screwing the guide bolt pin by the screws, and finishing butt joint installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110634033.1A CN113305529A (en) | 2021-06-07 | 2021-06-07 | Flexible butt joint structure and method for vertical assembly of medium-large rocket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110634033.1A CN113305529A (en) | 2021-06-07 | 2021-06-07 | Flexible butt joint structure and method for vertical assembly of medium-large rocket |
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| CN113305529A true CN113305529A (en) | 2021-08-27 |
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| CN202110634033.1A Pending CN113305529A (en) | 2021-06-07 | 2021-06-07 | Flexible butt joint structure and method for vertical assembly of medium-large rocket |
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Application publication date: 20210827 |