CN113857795A - Cabin section machining method - Google Patents
Cabin section machining method Download PDFInfo
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- CN113857795A CN113857795A CN202111330384.XA CN202111330384A CN113857795A CN 113857795 A CN113857795 A CN 113857795A CN 202111330384 A CN202111330384 A CN 202111330384A CN 113857795 A CN113857795 A CN 113857795A
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- 238000003754 machining Methods 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 66
- 239000002994 raw material Substances 0.000 claims abstract description 138
- 238000012545 processing Methods 0.000 claims abstract description 44
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 238000003466 welding Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims description 28
- 238000003801 milling Methods 0.000 claims description 25
- 239000002775 capsule Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000003672 processing method Methods 0.000 abstract description 5
- 238000012797 qualification Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 36
- 238000005520 cutting process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
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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
- 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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Abstract
The embodiment of the application discloses a method for processing a cabin section, wherein the cabin section comprises an end frame and a skin. The skin includes the connector, and the end frame imbeds in the connector. The processing method of the cabin section comprises the steps of welding an end frame and a skin to form a cabin section raw material; roughly processing the inner surface of the cabin section raw material, the outer surface of the cabin section raw material, an opening at the skin and a groove at the end frame; and finishing the inner surface of the cabin section raw material, the outer surface of the cabin section raw material, an opening at the skin, a groove at the end frame and a sealing groove at the end frame. After welding the end frame and the skin, rough machining and finish machining are carried out on the cabin section raw material, the influence of welding on the cabin section machining process is reduced, the precision of the cabin section is improved, the machining qualification rate of the cabin section is ensured, the machining efficiency is improved, meanwhile, the surface of the cabin section is more smooth through the rough machining and the finish machining process, continuous alignment can be carried out in the rough machining and the finish machining process, deformation of the cabin section caused by the machining process is avoided, and the reliability of the machining method of the cabin section is improved.
Description
Technical Field
The embodiment of the application relates to the technical field of cabin section processing, in particular to a cabin section processing method.
Background
The thin-wall aluminum alloy cabin section is an important part of a space product, can provide installation space for different instruments or equipment, and plays a role in bearing load.
However, the diameter of the cabin section is usually larger, the skin is thinner, and the rigidity is weaker, so that the cabin section is easy to deform in the processing process, the processing difficulty of the cabin section is increased, the precision of the cabin section is reduced, and the qualification rate of cabin section processing is reduced.
Disclosure of Invention
In order to solve at least one of the above technical problems, a first aspect of the embodiments of the present application provides a method for processing a cabin segment, where the cabin segment includes an end frame and a skin, the skin includes a connection port, the end frame is embedded in the connection port, and the method for processing the cabin segment includes welding the end frame and the skin to form a raw material of the cabin segment; roughly processing the inner surface of the cabin section raw material, the outer surface of the cabin section raw material, an opening at the skin and a groove at the end frame; and finishing the inner surface of the cabin section raw material, the outer surface of the cabin section raw material, an opening at the skin, a groove at the end frame and a sealing groove at the end frame.
In one possible embodiment, the step of roughing the inner surface of the cabin section material, the outer surface of the cabin section material, the opening at the skin and the groove at the end frame comprises roughing the inner surface of the cabin section material and the outer surface of the cabin section material; roughly milling an opening at the skin and a groove at the end frame; the step of fine machining the inner surface of the cabin section raw material, the outer surface of the cabin section raw material, the opening at the skin, the groove at the end frame and the sealing groove at the end frame comprises the step of semi-fine machining the inner surface of the cabin section raw material and the outer surface of the cabin section raw material; finely milling an opening at the skin and a groove at the end frame; the inner surface of the fine turning cabin section raw material, the outer surface of the cabin section raw material and the sealing grooves at the end frames.
In one possible embodiment, the step of roughing the inner surface of the bilge stock and the outer surface of the bilge stock comprises roughing the inner surface of the bilge stock and the outer surface of the bilge stock such that a thickness margin of the inner surface of the skin is between 1mm and 1.5mm, a thickness margin of the outer surface of the skin is between 1.5mm and 2mm, a roundness of the skin is less than or equal to 0.6mm, a height margin of the bilge stock is between 6mm and 10mm, and a flatness of the end frame is less than or equal to 0.3 mm; the step of rough milling the opening at the skin and the groove at the end frame includes rough milling the opening at the skin and the groove at the end frame such that the margin of the opening at the skin is between 2mm and 3mm and the margin of the groove at the end frame is between 2mm and 3 mm.
In one possible embodiment, the step of semi-finishing the inner surface of the bilge material and the outer surface of the bilge material comprises semi-finishing the inner surface of the bilge material and the outer surface of the bilge material such that a thickness margin of the inner surface of the skin is between 1mm and 1.2mm, a thickness margin of the outer surface of the skin is between 1mm and 1.2mm, a height margin of the bilge material is between 2mm and 3mm, a flatness of the end frame is less than or equal to 0.2mm, and a roundness of the skin is less than or equal to 0.3 mm.
In one possible embodiment, the step of finish milling the opening at the skin and the groove at the end frame includes finish milling the opening at the skin and the groove at the end frame, and processing the opening at the skin and the groove at the end frame to preset sizes; finish turning the inner surface of the cabin section raw material, the outer surface of the cabin section raw material and the sealing grooves at the end frames, wherein the finish turning comprises finish turning the inner surface of the skin and the outer surface of the skin, and processing the thickness of the skin to a preset size to ensure that the roundness of the skin is less than or equal to 0.3 mm; and finely turning a sealing groove at the end frame, and processing the sealing groove to a preset size.
In one possible embodiment, the step of finishing the inner surface of the hold section stock material and the outer surface of the hold section stock material further comprises finishing the end frame such that the height margin of the hold section stock material is less than or equal to 1mm and the flatness of the end frame is less than or equal to 0.15 mm.
In one possible embodiment, the step of finishing the inner surface of the hold section stock material and the outer surface of the hold section stock material further comprises finishing the end frame to machine the hold section stock material to a predetermined height, the end frame having a flatness of less than or equal to 0.1 mm.
In one possible embodiment, the step of welding the end bell and the skin to form the stock material for the hold section includes welding the end bell and the skin such that the end bell and the skin are less than or equal to 0.4mm in coaxiality, the difference in height between the end bell and the skin is less than or equal to 0.3mm, and the stock material for the hold section has a height margin of between 10mm and 12 mm.
In one possible embodiment, the diameter of the outer surface of the end bell is greater than the diameter of the inner surface of the skin, the diameter of the outer surface of the end bell has a first difference with the diameter of the inner surface of the skin, and before welding the end bell and the skin to form the stock of the capsule section, the method further comprises controlling the first difference to be between 0.5mm and 0.9mm, the recess allowance of the end bell to be between 3mm and 5mm, the thickness allowance of the contact position of the skin with the end bell to be between 3.5mm and 4mm, and the thickness deviation of the contact position of the skin with the end bell is less than or equal to 0.3 mm.
In a possible implementation mode, after finishing the inner surface of the cabin section raw material, the outer surface of the cabin section raw material, the opening at the skin, the groove at the end frame and the sealing groove at the end frame, the method further comprises the step of forming a connecting hole in the end frame.
The embodiment of the application has the following beneficial effects:
after the end frame and the skin are welded, the cabin section raw material is subjected to rough machining and finish machining, the influence of welding on the cabin section machining process is reduced, the cabin section machining yield is improved, and meanwhile the cabin section machining efficiency is improved. In addition, through the rough machining and the finish machining processes, the allowance of the cabin raw materials can be removed, so that the surface of the cabin is smoother, and the machining precision of the cabin is further improved.
In addition, the shape of the cabin section can be constantly aligned by setting the rough machining and the finish machining processes, so that the cabin section is prevented from deforming in the machining process, and the reliability of the cabin section machining method is further improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart illustrating one embodiment of a method for processing a section of a nacelle according to the present disclosure;
FIG. 2 is one of the schematic structural views of a section according to an embodiment provided herein;
FIG. 3 is a second schematic illustration of a structure of a section according to an embodiment of the present application;
FIG. 4 is a second flowchart illustrating the steps of a method of manufacturing a nacelle section according to one embodiment of the present disclosure;
FIG. 5 is a third flowchart illustrating the method steps of processing a nacelle section according to one embodiment of the present disclosure;
fig. 6 is a schematic end frame structure according to an embodiment of the present disclosure.
Wherein, the correspondence between the reference numbers and the part names in fig. 2, fig. 3 and fig. 6 is:
100: cabin segment, 110: end frame, 112: first end bell, 114: second end bell, 116: groove, 118: connection hole, 120: skin, 122: and (4) opening.
Detailed Description
In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present application are described in detail below with reference to the drawings and the specific embodiments, and it should be understood that the specific features of the embodiments and the embodiments of the present application are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
In a first aspect, as shown in fig. 1, the present specification provides a method for manufacturing a cabin segment, where the cabin segment 100 includes an end frame 110 and a skin 120, the skin 120 includes a connection port, and the end frame 110 is inserted into the connection port.
The processing method of the cabin section comprises the following steps:
step S101, welding an end frame and a skin to form a cabin section raw material;
step S102, roughly machining the inner surface of the cabin section raw material, the outer surface of the cabin section raw material, an opening at a skin and a groove at an end frame;
and S103, finishing the inner surface of the cabin section raw material, the outer surface of the cabin section raw material, the opening at the skin, the groove at the end frame and the sealing groove at the end frame.
It will be appreciated that the bay section 100 may be an aluminum alloy bay section, a titanium alloy bay section, or the like. The deck section 100 is used to provide an installation space for parts or instruments, etc., and to perform a load-bearing function.
As shown in fig. 2 and 3, the tank section 100 includes an end frame 110 and a skin 120. Specifically, the skin 110 is a cylindrical thin metal wall, and the end frame 110 is an annular metal plate. The end bell 110 fits within the port, which is understandably shaped to fit the end bell 110.
In some embodiments, the end frame 120 and the skin 110 may be made of the same material or different materials.
In some examples, the number of end boxes 120 may be one or more. When the number of the end frames 110 is two, the end frames may be respectively disposed at the connection ports of the two ends of the skin 110. It will be appreciated that the first end bell 112 and the second end bell 114 may be the same shape or different shapes.
After welding the end bell 110 and the skin 120 to form the cabin stock, the opening 122 and the groove 116 are machined. Specifically, the opening 122 opens on the skin 120 and the recess 116 opens on the end frame 110. It will be appreciated that the groove 116 is used to connect the end bell 110 to other end bells, or to connect the end bell 110 to instrumentation, etc. In some examples, the number of grooves 116 may be one or more. The shape of the different grooves 116 may be the same or different.
It will be appreciated that opening 122 is used to attach equipment or instrumentation or the like to section 110. In some examples, the number of openings 122 may be one or more. The shape of the openings 122 may be the same or different.
The method of processing the cabin segment includes welding the end frames and the skin to form the cabin segment stock. The method has the advantages that a large amount of allowance of the end frame and the skin is removed before the end frame and the skin are welded, after part of allowance is reserved, the end frame and the skin are welded to form the cabin section raw material, the problem that machining efficiency of the cabin section is reduced due to the fact that the allowance of the end frame and the skin is too large in the machining process is solved, or the allowance of the end frame and the skin is too small to cause the fact that machining accuracy of the cabin section is affected due to the fact that the allowance is insufficient in rough machining or finish machining is avoided.
It will be appreciated that roughing the interior surface of the hold stock includes roughing the interior surface of the end bell and the interior surface of the skin, and roughing the exterior surface of the hold stock includes roughing the exterior surface of the end bell and the exterior surface of the skin.
In the rough machining process, partial allowance of the cabin section raw materials can be removed, so that the inner surface and the outer surface of the end frame and the inner surface and the outer surface of the skin are smoother, and the machining precision of the cabin section is improved. And roughly machining the opening at the skin and the groove at the end frame, so that the opening and the groove can keep partial allowance, and the machining precision of the opening and the groove is improved.
In some examples, the rough machining can be a rough turning or rough milling process, and the flexibility of a machining method of the cabin section is improved.
It will be appreciated that finishing the interior surface of the hold stock includes finishing the interior surface of the endbell and the interior surface of the skin, and finishing the exterior surface of the hold stock includes finishing the exterior surface of the endbell and the exterior surface of the skin.
The allowance of the cabin section raw material can be removed in the finish machining process, the cabin section raw material is machined to a set size, the machining precision of the cabin section raw material is improved, and meanwhile the surface of the cabin section is enabled to be more smooth. And (3) performing finish machining on the opening at the skin and the groove at the end frame, so that the opening and the groove can be machined to preset sizes, and the reliability of the cabin section machining method is improved.
In some examples, the finish machining can be a finish turning or finish milling process, and the flexibility of a machining method of the cabin section is improved.
Understandably, during rough machining and finish machining, the cabin raw material can be aligned, and by means of continuous alignment machining, deformation of the cabin raw material caused by the machining process is avoided, and reliability of the cabin raw material machining method is improved.
After the end frame and the skin are welded, the cabin section raw material is subjected to rough machining and finish machining, so that the influence of welding on the cabin section precision is reduced, the cabin section machining yield is improved, and the cabin section machining efficiency is improved. Meanwhile, through the rough machining and the finish machining processes, the allowance of the cabin raw materials can be removed, so that the surface of the cabin is smoother, and the machining precision of the cabin is further improved.
In addition, the shape of the cabin section can be constantly aligned by setting the rough machining and the finish machining processes, so that the cabin section is prevented from deforming in the machining process, and the reliability of the cabin section machining method is further improved.
In some examples, as shown in fig. 4, the step of roughing the inner surface of the stock, the outer surface of the stock, the opening at the skin, and the groove at the end frame includes:
step S201, the inner surface of the raw material of the coarse cabin section and the outer surface of the raw material of the cabin section are processed;
step S202, roughly milling an opening at the skin and a groove at the end frame.
As shown in fig. 5, the step of finishing the inner surface of the hold section stock, the outer surface of the hold section stock, the opening at the skin, the groove at the end frame, and the seal groove at the end frame includes:
step S301, carrying out semi-finishing on the inner surface of the cabin section raw material and the outer surface of the cabin section raw material;
step S302, finely milling an opening at a skin and a groove at an end frame;
step S303, finish turning the inner surface of the cabin section raw material, the outer surface of the cabin section raw material and sealing grooves at the end frames.
It will be appreciated that the inner surface of the raw material of the rough cabin segment includes the inner surface of the rough skin and the inner surface of the end bell, and the outer surface of the raw material of the rough cabin segment includes the outer surface of the rough skin and the outer surface of the end bell.
The inner surface of the raw material of the coarse cabin section and the outer surface of the raw material of the cabin section can remove partial allowance of the inner surface of the raw material of the cabin section and the outer surface of the raw material of the cabin section, so that the surface of the cabin section is smoother, and the processing precision of the cabin section is improved.
In some examples, the cabin section raw material can be aligned when the inner surface and the outer surface of the cabin section raw material are roughly turned, so that deformation of the cabin section raw material caused by a rough turning process is avoided, and the processing precision of the cabin section raw material is further improved.
It can be understood that the opening at the skin is left with a margin, that is, the size of the opening at the skin is smaller than the preset size, and when the groove at the end frame is left with a margin, that is, the depth of the groove at the end frame is smaller than the preset depth. The opening at the skin and the groove at the end frame are roughly milled, partial allowance of the opening and the groove can be removed, the size of the opening and the depth of the end frame are increased, and the processing precision of the opening and the groove is improved.
The inner surface of the cabin section raw material and the outer surface of the cabin section raw material are subjected to semi-finish turning, and understandably, the allowance of the inner surface and the allowance of the outer surface of the cabin section raw material can be further removed in the semi-finish turning process, so that the cabin section raw material is closer to the preset size.
In some examples, the cabin section raw material can be aligned when the inner surface and the outer surface of the cabin section raw material are semi-finished, so that deformation of the cabin section raw material caused by a semi-finished turning process is avoided, and the processing precision of the cabin section raw material is further improved.
The opening of covering department and the recess of end frame department are milled to the finish, can understand ground, can make opening and recess reach preset size through the finish milling, improve the machining precision of opening and recess.
The inner surface of the cabin section raw material, the outer surface of the cabin section raw material and the sealing grooves at the end frames are finely turned, so that the allowance of the cabin section raw material can be further removed in the fine turning process, the cabin section reaches the preset size, and the machining precision of the cabin section is improved.
The sealing groove at the end frame is used for sealing the cabin section, and the sealing groove at the finish turning end frame can enable the sealing groove of the end frame to reach a preset size, so that the reliability of the processing method of the cabin section is improved.
In some examples, the step of roughening the inner surface of the car hold stock and the outer surface of the hold stock comprises:
the thickness allowance of the inner surface of the skin is between 1mm and 1.5mm, the thickness allowance of the outer surface of the skin is between 1.5mm and 2mm, the roundness of the skin is less than or equal to 0.6mm, the height allowance of the cabin section raw material is between 6mm and 10mm, and the flatness of the end frame is less than or equal to 0.3 mm;
the step of rough milling the opening at the skin and the groove at the end frame comprises:
roughly milling an opening at the skin and a groove at the end frame to ensure that the opening allowance at the skin is between 2mm and 3mm, and the groove allowance at the end frame is between 2mm and 3 mm.
It will be appreciated that the sum of the thickness margin of the inner surface of the skin and the thickness margin of the outer surface of the skin is the thickness margin of the skin. By rough turning the inner surface of the skin, the inner shape of the skin can be controlled, and by rough turning the outer surface of the skin, the outer shape of the skin can be controlled. The inner surface and the outer surface of the raw material of the coarse cabin section can reduce the thickness difference of the skin at different positions, improve the thickness uniformity of the skin and simultaneously improve the roundness of the skin.
Specifically, during the rough turning process, the thickness allowance of the inner surface of the skin can be controlled to be 1 mm-1.5 mm, and the thickness allowance of the outer surface of the skin is controlled to be 1.5 mm-2 mm, so that the problem that the machining efficiency of the cabin section is reduced due to the overlarge thickness allowance of the skin is avoided, or the machining precision of the cabin section is influenced due to the undersize thickness allowance of the skin is avoided.
In some examples, the thickness margin of the inner surface of the skin may be 1mm, 1.2mm, or 1.3mm, and the thickness margin of the outer surface of the skin may be 1.5mm, 1.7mm, or 1.9 mm.
During the rough turning process, the roundness of the skin can be controlled, and the machining precision of the cabin section is further improved. As can be appreciated, roundness is the difference between the maximum and minimum radii. Specifically, the roundness of the skin can be controlled to be less than or equal to 0.6mm, namely the roundness of the skin is controlled to be between 0 and 0.6mm, and the processing precision of the cabin section is further improved. In some examples, the roundness of the skin may be 0.3mm, 0.4mm, or 0.5 mm.
The inner surface and the outer surface of the raw material of the coarse cabin section can also control the height allowance of the raw material of the cabin section and the planeness of the end frame.
Specifically, the height allowance of the cabin section raw material can be controlled to be between 6mm and 10mm, the flatness of the end frame is smaller than or equal to 0.3mm, namely the flatness of the end frame is controlled to be between 0mm and 0.3mm, the phenomenon that the height allowance of the cabin section raw material is too large and the processing efficiency of the cabin section is reduced is avoided, or the height allowance of the cabin section raw material is too small and the processing precision of the cabin section is influenced is avoided, meanwhile, the surface of the end frame can be more flat, and the reliability of the cabin section processing method is improved.
In some examples, the height margin of the deck section may be controlled to be 7.5mm, 8.5mm, or 9mm, and the flatness of the end bell may be controlled to be 0.1mm, 0.15mm, or 0.2 mm.
Through the rough turning process, the thickness allowance of the inner surface of the skin, the thickness allowance of the outer surface of the skin and the height allowance of the cabin section raw material are reasonably controlled, and the roundness of the skin and the planeness of the end frame are controlled, so that the surface of the cabin section is more smooth, the machining precision of the cabin section is further ensured, the excessive allowance is avoided, the machining efficiency of the cabin section is reduced, or the allowance is too small, the precision of the cabin section is influenced, the reliability of the machining method of the cabin section raw material is improved, the machining efficiency of the cabin section is ensured, and the machining qualified rate of the cabin section is improved.
Roughly mill the opening of covering department and the recess of end frame department to make the opening surplus of covering department between 2mm to 3mm, the recess surplus of end frame department is between 2mm to 3mm, makes the size of opening and recess more be close to preset size, avoids the too big reduction machining efficiency of the surplus of opening and recess, perhaps the surplus undersize of opening and recess influences the machining precision. In some examples, the balance of the opening may be 2mm, 2.5mm, or 2.8mm, and the balance of the groove may be 2mm, 2.5mm, or 2.8 mm. The margin of the opening and the margin of the groove may be the same or different.
In some embodiments, the concentricity of the skin and the end bell may also be controlled during the rough turning process. Understandably, the coaxiality of the skin and the end frame is the distance between the axis of the skin and the axis of the end frame.
In particular, in the rough turning process, the coaxiality of the skin and the end frame can be controlled to be less than or equal to 0.5mm, namely the coaxiality of the skin and the end frame is controlled to be between 0 and 0.5mm, and the machining precision of the cabin section is ensured. In some examples, the skin and end bells may be 0.2mm, 0.3mm, or 0.4mm in coaxiality.
In some examples, four symmetrical points on the skin can be determined, and the coaxiality of the four symmetrical points is aligned to be between 0 and 0.1mm, so that the processing precision of the cabin section is further improved.
In some examples, the step of semi-finishing the inner surface of the hold section stock and the outer surface of the hold section stock includes:
the thickness allowance of the inner surface of the skin is between 1mm and 1.2mm, the thickness allowance of the outer surface of the skin is between 1mm and 1.2mm, the height allowance of the cabin section material is between 2mm and 3mm, the flatness of the end frame is less than or equal to 0.2mm, and the roundness of the skin is less than or equal to 0.3 mm.
The inner surface of the semi-finish turning cabin section raw material comprises the inner surface of a semi-finish turning cabin section skin and the inner surface of the end frame, and the outer surface of the semi-finish turning cabin section raw material comprises the outer surface of the semi-finish turning skin and the outer surface of the end frame.
It will be appreciated that by the semi-finish turning process, the balance of the hold stock can be further removed. Specifically, in the semi-finish turning process, the thickness allowance of the inner surface of the skin is controlled to be between 1mm and 1.2mm, the thickness allowance of the outer surface of the skin is controlled to be between 1mm and 1.2mm, the roundness of the skin is smaller than or equal to 0.3mm, namely the roundness of the skin is controlled to be between 0mm and 0.3mm, the roundness of the skin is further improved, the allowance of the skin is reduced, the thickness uniformity of the skin is improved, and therefore the machining precision of the cabin section is improved.
In some examples, the thickness margin for the inner surface of the skin may be 1mm, 1.1mm, or 1.2mm, and the thickness margin for the outer surface of the skin may be 1mm, 1.1mm, or 1.2 mm. The thickness allowance of the inner surface of the skin and the thickness allowance of the outer surface of the skin can be the same or different. The roundness of the skin may be 0.1mm, 0.15mm, or 0.2 mm.
The inner surface of the raw material of the semi-finished cabin section and the outer surface of the raw material of the cabin section can also ensure that the height allowance of the raw material of the cabin section is between 2mm and 3mm, the flatness of the end frame is less than or equal to 0.2mm, namely the flatness of the skin is controlled to be between 0mm and 0.2 mm. Through the inner surface of the semi-finish turning cabin section raw material and the outer surface of the cabin section raw material, the height allowance of the cabin section raw material can be further removed, so that the surface of the end frame is smoother, and the machining precision of the cabin section is improved.
In some examples, the height margin of the hold stock may be 1.2mm, 2.5mm, or 2.8 mm. The flatness of the end bells may be 0.05mm, 0.1mm or 0.15 mm.
In some examples, during the semi-finish turning process, the roundness of the shell can be detected once every 40mm to 60mm, and the cabin raw material is aligned according to the roundness of the shell at different positions, so that the roundness difference value of the shell at different positions is reduced, the cabin raw material deformation caused by the semi-finish turning process is avoided, and the cabin precision is further improved.
In some examples, the step of finish milling the opening at the skin and the groove at the end frame includes:
finely milling an opening at the skin and a groove at the end frame, and processing the opening at the skin and the groove at the end frame to preset sizes;
the steps of finely turning the inner surface of the cabin section raw material, the outer surface of the cabin section raw material and the sealing grooves at the end frames comprise:
finely turning the inner surface of the skin and the outer surface of the skin, and processing the thickness of the skin to a preset size to ensure that the roundness of the skin is less than or equal to 0.3 mm;
and finely turning a sealing groove at the end frame, and processing the sealing groove to a preset size.
The opening at the skin and the groove at the end frame are processed to preset sizes by finish milling the opening at the skin and the groove at the end frame, so that the precision of the cabin section is improved.
And finely turning the inner surface of the skin and the outer surface of the skin, and processing the thickness of the skin to a preset size. It can be understood that the roundness of the skin is controlled to be less than or equal to 0.3mm in the finish turning process, namely the roundness of the skin is controlled to be 0-0.3 mm, and the processing precision of the cabin section is further improved. In some examples, the roundness of the skin may be 0.05mm, 0.1mm, or 0.2 mm.
Finish turning the seal groove of the end frame, so that the seal groove of the end frame is processed to a preset size, and the precision of the cabin section is improved.
In some examples, during a finish turning process, the roundness of the skin can be detected once every 40mm to 60mm, and the cabin section raw material is aligned according to the roundness of the skin at different positions, so that the roundness difference value of the skin at different positions is reduced, deformation of the cabin section raw material caused by the finish turning process is avoided, and the precision of the cabin section is further improved.
Through finish milling opening and recess, with opening and recess processing to predetermineeing the size, the seal groove is turned to the finish, processes to predetermineeing the size with the seal groove. Finish turning the inner surface and the outer surface of the skin, processing the thickness of the skin to a preset size, and controlling the roundness of the skin to be less than or equal to 0.3mm, so that the precision of the cabin section is further ensured.
In some examples, the step of finishing the inner surface of the hold section stock material and the outer surface of the hold section stock material further comprises:
and (4) finely turning the end frame to ensure that the height allowance of the cabin section raw material is less than or equal to 1mm, and the flatness of the end frame is less than or equal to 0.15 mm.
The end frame is finely turned, so that the height allowance of the cabin section raw material can be controlled, the height allowance of the cabin section raw material is smaller than or equal to 1mm, namely the height allowance of the cabin section raw material is controlled to be between 0m and 1mm, the flatness of the control end frame is smaller than or equal to 0.15mm, namely the flatness of the control end frame is controlled to be between 0mm and 0.15mm, and the precision of the cabin section is further improved.
In some examples, the height margin of the hold stock may be 0.2mm, 0.5mm, or 0.8 mm. The flatness of the end bell may be 0.05mm, 0.08mm or 0.12 mm.
In some examples, the step of finishing the inner surface of the hold section stock material and the outer surface of the hold section stock material further comprises:
and (4) finely turning the end frame to enable the cabin section raw material to be processed to a preset height, wherein the planeness of the end frame is less than or equal to 0.1 mm.
Finish turning the end frame to enable the height of the cabin section raw material to be processed to a preset size, controlling the flatness of the end frame to be less than or equal to 0.1mm, namely controlling the flatness of the end frame to be between 0 and 0.1mm, enabling the surface of the end frame to be more smooth, and improving the precision of the cabin section. In some examples, the flatness of the end bells may be 0.02mm, 0.05mm, or 0.08 mm.
In some examples, the step of welding the end frames and the skin to form the stock of the section includes:
welding the end frame and the skin to ensure that the coaxiality of the end frame and the skin is less than or equal to 0.4mm, the height difference between the end frame and the skin is less than or equal to 0.3mm, and the height allowance of the cabin section raw material is between 10mm and 12 mm.
When the end frame and the skin are welded, the coaxiality of the end frame and the skin is smaller than or equal to 0.4mm, namely the coaxiality of the end frame and the skin is controlled to be between 0 and 0.4mm, and the problem that the coaxiality of the end frame and the skin is too large to influence the machining precision of the cabin section is avoided. In some examples, the end bells may be 0.2mm, 0.25mm, or 0.3mm in-line with the skin.
It will be appreciated that the difference in height between the end bell and the skin is the difference between the upper surface of the end bell and the upper surface of the skin. The height difference between the control end frame and the skin is smaller than or equal to 0.3mm, namely the difference between the upper surface of the control end frame and the upper surface of the skin is 0-0.3 mm, so that the end frame can be prevented from protruding or sinking too much relative to the skin, and the processing precision of the cabin section is further improved.
In some examples, the difference in height of the end bells from the skin may be 0.1mm, 0.2mm, or 0.25 mm.
The height allowance of the cabin section raw materials is controlled to be between 10mm and 12mm, so that the problem that the machining efficiency of the cabin section is influenced due to the fact that the allowance of the cabin section raw materials is too large or the machining precision of the cabin section is influenced due to the fact that sufficient allowance cannot be provided for the subsequent working procedure due to the fact that the allowance of the cabin section raw materials is too small is avoided. In some examples, the height margin of the hold stock may be 10.5mm, 11mm, or 11.5 mm.
In some examples, a diameter of the end bell outer surface is greater than a diameter of the skin inner surface, with a first difference between the diameter of the end bell outer surface and the diameter of the skin inner surface.
Before welding end frame and covering to form the cabin section raw materials, still include:
and controlling the first difference value to be between 0.5mm and 0.9mm, the groove allowance of the end frame to be between 3mm and 5mm, the thickness allowance of the skin to be between 3.5mm and 4mm, and the thickness deviation of the skin to be less than or equal to 0.3 mm.
The diameter of the outer surface of the end frame is larger than that of the inner surface of the skin, so that the end frame can be clamped in the connecting port, the end frame is prevented from being separated from the skin, and the convenience of welding between the end frame and the skin is further improved. And the first difference between the diameter of the outer surface of the end frame and the diameter of the inner surface of the skin is controlled to be 0.5 mm-0.9 mm, so that the problem that the end frame cannot be embedded into the connecting port due to overlarge first difference is avoided, or the welding effect between the end frame and the skin is influenced due to the fact that the first difference is too small is solved. In particular, the first difference may be 0.6mm, 0.7mm or 0.8 mm.
The control end frame recess surplus has avoided the recess surplus too big between 3mm to 5mm, influences machining efficiency, perhaps recess surplus undersize reduces the machining precision. In particular, the margin of the recess may be 3.5mm, 4mm or 4.5 mm.
The thickness allowance of the contact position of the control skin and the end frame is between 3.5mm and 4mm, the phenomenon that the machining effect is reduced due to the fact that the thickness allowance is too large is avoided, or the machining precision is influenced due to the fact that the thickness allowance is too small is avoided. Specifically, the thickness margin of the skin at the contact position with the end frame may be 3.6mm, 3.8mm or 3.9 mm.
It will be appreciated that when the outer surface of the nacelle section is rough machined and the outer surface of the nacelle section is finished, the thickness margin at the location where the skin contacts the end bells can be removed.
Meanwhile, the thickness deviation of the contact position of the skin and the end frame is controlled to be less than or equal to 0.3mm, and understandably, the thickness deviation of the skin is the difference value of the thickest position of the skin at the thinnest position, namely the difference value of the thick position and the thinnest position of the contact position of the skin and the end frame is controlled to be 0-0.3 mm, so that the thickness uniformity of the skin is improved, and the processing precision of the cabin section is further ensured. Specifically, the thickness deviation of the skin from the end frame contact position may be 0.1mm, 0.15mm, or 0.2 mm.
In some examples, finishing the inner surface of the capsule section stock, the outer surface of the capsule section stock, the opening at the skin, the groove at the end frame, and the sealing groove at the end frame further comprises:
the end frame is provided with a connecting hole.
As shown in fig. 6, the end frame 110 includes connection holes 118, and the connection holes 118 are used to connect the end frame 110 with other end frames, or to connect the end frame 110 with an instrument or the like. The number of the connection holes 118 may be one or more. The sizes of the different connecting holes 118 may be the same or different.
After the inner surface of the cabin section raw material, the outer surface of the cabin section raw material, the opening at the skin, the groove at the end frame and the sealing groove at the end frame are finely processed, namely the cabin section raw material is processed to a preset size, the end frame is provided with the connecting hole, the applicability of the cabin section is improved, meanwhile, the influence of the hole opening process on the cabin section processing process is reduced, and the precision of the cabin section is further improved.
In one particular embodiment, a method of manufacturing a tank section is provided, as shown in fig. 2, a tank section 100 including a first end frame 112, a second end frame 114, and a skin 120. The first and second end frames 112, 114 are welded to the skin 120 to form the cabin stock.
Specifically, the blank size of the first end frame 112 may be Φ 1215mm × Φ 1089mm × 129mm, the blank size of the second end frame 114 may be Φ 1215mm × Φ 989mm × 110mm, the blank size of the skin may be Φ 1200mm × Φ 1180mm × 530mm, the outer circle size of the section stock may be Φ 1200.6mm, the height of the section stock may be 582mm, and the thickness of the skin may be 10 mm.
The method of processing the nacelle section includes controlling the dimensions of the welded front skin and end frames. It is understood that the diameter of the outer surface of the segment frame is greater than the diameter of the inner surface of the skin, and in particular, the difference between the diameter of the outer surface of the control end frame and the diameter of the inner surface of the skin is between 0.5mm and 0.9mm before welding, the thickness deviation of the contact position of the control skin and the end frame is less than or equal to 0.3mm, and the coaxiality of the control skin and the end frame is less than or equal to 0.4 mm. And the height difference between the skin and the end frame is controlled to be less than or equal to 0.3 mm.
After welding, the total height allowance of the cabin section raw materials is controlled to be 12mm, the thickness allowance of the skin is controlled to be 4mm, and the groove allowance of the end frame is controlled to be 3 mm.
In the rough turning process, the inner surface of the cabin section raw material and the outer surface of the cabin section raw material are roughly turned. Specifically, after clamping and alignment, two end faces of the cabin section are roughly machined, large allowance of the inner shape of the end frame is roughly machined, and the cutting depth is smaller than or equal to 1mm each time. And then clamping and aligning again, and roughly processing the inner surfaces and the outer surfaces of the end frames and the skins.
In the rough turning process, the height of the cabin section raw material is controlled to be 6mm, the thickness of the outer surface of the skin is controlled to be 1.5mm, the thickness of the inner surface of the skin is controlled to be 1mm, the flatness of the end frame is less than or equal to 0.3mm, and the roundness of the skin is less than or equal to 0.6 mm.
In the rough turning process, the coaxiality of the first end frame, the second end frame and the skin is aligned to be less than or equal to 0.5mm, and then the coaxiality of four randomly symmetrical points on the skin is aligned to be less than or equal to 0.1 mm. Understandably, in the rough turning process, the height of the cabin section raw material needs to be processed by coordinating the groove depth of the end frame.
Roughly milling a groove and an opening, controlling the allowance of the groove to be 2mm, and controlling the allowance of the opening to be 2 mm.
In the semi-finish turning procedure, the inner surface of the cabin section raw material and the outer surface of the cabin section raw material are semi-finished turned, the inner surface and the outer surface of the cabin section raw material are cut for multiple times, and the cutting depth is controlled to be 0.3mm each time.
In the semi-finish turning process, the height allowance of the cabin section raw material is controlled to be 2mm, the thickness allowance of the inner surface of the skin is controlled to be 1mm, and the thickness allowance of the outer surface of the skin is controlled to be 1 mm.
In the semi-finish turning process, the roundness of the skin is detected once every 50mm along the height direction of the skin, and whether enough machining allowance exists is calculated according to the roundness condition. And if the allowance is insufficient, coordinating the center of the part, or performing shape correction treatment on the part, and then reprocessing, so that the processing precision is improved, and the deformation of the cabin section raw material caused by a semi-finish turning process is avoided.
In the semi-finish turning process, the flatness of the end frame is controlled to be less than or equal to 0.2mm, and the roundness of the skin is controlled to be less than or equal to 0.3 mm.
And (4) finely milling the groove and the opening, and processing the groove and the opening to preset sizes.
And (3) finely turning the inner surface of the cabin section raw material and the outer surface of the cabin section raw material, controlling the cutting depth of each time to be 0.2mm, and controlling the rotating speed of a cutting knife to be 100-120 r/min.
The finish turning process processes the thickness of the skin to a preset size, the allowance in the height direction of the cabin section raw material is 1mm, and the first end frame and the second end frame respectively have an allowance of 0.5 mm.
In the finish turning process, the roundness of the part is detected at intervals of 50mm in the height direction of the skin, whether enough machining allowance exists is calculated according to the roundness condition, if the allowance is insufficient, the center of the part is coordinated or the part is corrected, and then the part is processed, so that the precision of the cabin section is improved, and the deformation of the raw material of the cabin section caused by the finish turning process is avoided.
In the finish turning process, the flatness of the end frame is controlled to be less than or equal to 0.15mm, and the roundness of the skin is controlled to be less than or equal to 0.3 mm.
Finish turning the first end frame and the second end frame, processing the total height of the cabin section raw material to the size, and controlling the flatness of the end frames to be less than or equal to 0.08 mm.
And finely turning the sealing groove to enable the sealing groove to reach a preset size, and forming a connecting hole in the end face to form a cabin section.
By means of the control of the assembly size of the parts before welding, reasonable design of process flow and process allowance, coordination and alignment in the machining process, process precision control and the like, deformation of the cabin section in the machining process is avoided, the machining precision of the cabin section is improved, the machining quality of the cabin section is guaranteed, the machining pass rate of the cabin section is improved, meanwhile, the machining efficiency of the cabin section is improved, and the reliability of the machining method of the cabin section is further improved.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method of manufacturing a tank section, the tank section comprising an end frame and a skin, the skin comprising a connection opening into which the end frame is inserted, the method comprising:
welding the end frames and the skin to form a cabin stock;
roughly machining the inner surface of the cabin section raw material, the outer surface of the cabin section raw material, the opening at the skin and the groove at the end frame;
and finely machining the inner surface of the cabin section raw material, the outer surface of the cabin section raw material, the opening at the skin, the groove at the end frame and the sealing groove at the end frame.
2. The method of manufacturing a deck section as claimed in claim 1,
the step of roughing the inner surface of the capsule section stock, the outer surface of the capsule section stock, the opening at the skin and the groove at the end frame comprises:
rough turning the inner surface of the cabin section raw material and the outer surface of the cabin section raw material;
roughly milling an opening at the skin and a groove at the end frame;
the step of finish machining the inner surface of the capsule section stock, the outer surface of the capsule section stock, the opening at the skin, the groove at the end frame, and the sealing groove at the end frame comprises:
semi-finish turning the inner surface of the cabin section raw material and the outer surface of the cabin section raw material;
finely milling an opening at the skin and a groove at the end frame;
finish turning the inner surface of the cabin section raw material, the outer surface of the cabin section raw material and a sealing groove at the end frame.
3. Method for manufacturing a capsule according to claim 2,
the step of rough turning the inner surface of the hold section material and the outer surface of the hold section material comprises:
roughly turning the inner surface of the cabin section raw material and the outer surface of the cabin section raw material so that the thickness allowance of the inner surface of the skin is between 1mm and 1.5mm, the thickness allowance of the outer surface of the skin is between 1.5mm and 2mm, the roundness of the skin is less than or equal to 0.6mm, the height allowance of the cabin section raw material is between 6mm and 10mm, and the flatness of the end frame is less than or equal to 0.3 mm;
the step of rough milling the opening at the skin and the groove at the end frame comprises:
roughly milling an opening at the skin and a groove at the end frame to enable the allowance of the opening at the skin to be between 2mm and 3mm, and enabling the allowance of the groove at the end frame to be between 2mm and 3 mm.
4. The method of processing a hold of claim 2, wherein the step of semi-finishing the inner surface of the hold stock and the outer surface of the hold stock comprises:
semi-finish turning the inner surface of the cabin section raw material and the outer surface of the cabin section raw material to enable the thickness allowance of the inner surface of the skin to be between 1mm and 1.2mm, the thickness allowance of the outer surface of the skin to be between 1mm and 1.2mm, the height allowance of the cabin section raw material to be between 2mm and 3mm, the flatness of the end frame is smaller than or equal to 0.2mm, and the roundness of the skin is smaller than or equal to 0.3 mm.
5. The method of machining a nacelle section according to claim 2, wherein the step of finish milling the opening at the skin and the groove at the end frame comprises:
finely milling the opening at the skin and the groove at the end frame, and processing the opening at the skin and the groove at the end frame to preset sizes;
the step of finish turning the inner surface of the cabin section raw material, the outer surface of the cabin section raw material and the sealing grooves at the end frames comprises the following steps:
finely turning the inner surface of the skin and the outer surface of the skin, and processing the thickness of the skin to a preset size to ensure that the roundness of the skin is less than or equal to 0.3 mm;
and finely turning the sealing groove at the end frame, and processing the sealing groove to a preset size.
6. The method of processing a hold of claim 5, wherein the step of finish turning the inner surface of the hold stock and the outer surface of the hold stock further comprises:
and finely turning the end frame to ensure that the height allowance of the cabin section raw material is less than or equal to 1mm, and the flatness of the end frame is less than or equal to 0.15 mm.
7. The method of processing a hold of claim 6, wherein the step of finish turning the inner surface of the hold stock and the outer surface of the hold stock further comprises:
and finely turning the end frame to enable the cabin section raw material to be processed to a preset height, wherein the planeness of the end frame is less than or equal to 0.1 mm.
8. The method of manufacturing a capsule section according to any one of claims 1 to 7, wherein the step of welding the end frames and the skin to form the capsule section stock comprises:
welding the end frame and the skin to enable the coaxiality of the end frame and the skin to be less than or equal to 0.4mm, the height difference between the end frame and the skin to be less than or equal to 0.3mm, and the height allowance of the cabin section raw material to be between 10mm and 12 mm.
9. The method of fabricating a capsule section according to any one of claims 1 to 7, wherein the diameter of the outer end frame surface is greater than the diameter of the inner skin surface, the diameter of the outer end frame surface having a first difference from the diameter of the inner skin surface, and wherein the welding the end frame and the skin to form the capsule section stock further comprises:
and controlling the first difference value to be between 0.5mm and 0.9mm, controlling the groove allowance of the end frame to be between 3mm and 5mm, controlling the thickness allowance of the contact position of the skin and the end frame to be between 3.5mm and 4mm, and controlling the thickness deviation of the contact position of the skin and the end frame to be less than or equal to 0.3 mm.
10. The method of manufacturing a capsule according to any one of claims 1 to 7, wherein after finishing the inner surface of the capsule stock, the outer surface of the capsule stock, the opening at the skin, the groove at the end frame, and the sealing groove at the end frame, further comprising:
and the end frame is provided with a connecting hole.
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| CN202111330384.XA CN113857795A (en) | 2021-11-11 | 2021-11-11 | Cabin section machining method |
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| CN202111330384.XA CN113857795A (en) | 2021-11-11 | 2021-11-11 | Cabin section machining method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114998526A (en) * | 2022-06-23 | 2022-09-02 | 上海宇航系统工程研究所 | Skin process net size unfolding method based on error compensation |
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Application publication date: 20211231 |