CN114012362B - Machining method of thin-wall shell - Google Patents
Machining method of thin-wall shell Download PDFInfo
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- CN114012362B CN114012362B CN202111324476.7A CN202111324476A CN114012362B CN 114012362 B CN114012362 B CN 114012362B CN 202111324476 A CN202111324476 A CN 202111324476A CN 114012362 B CN114012362 B CN 114012362B
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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 application discloses a thin-wall shell and a processing method thereof, the thin-wall shell is provided with a revolving body shell, an annular mounting bulge and a plurality of mounting bosses, when in processing, a blank is processed to form an annular blank, the outer side surface and the inner side surface of the annular blank are roughly turned to form the revolving body shell, an annular bulge structure is formed on the inner side surface of the revolving body shell, the upper side surface, the lower side surface and the end surface of the annular bulge structure are roughly milled to form the annular mounting bulge and the mounting bosses, and hollow grooves and positioning mounting holes are formed in the mounting bosses to form the thin-wall shell; this location mounting hole corresponds with the mounting hole on the location frock, when carrying out the finish machining to the thin-walled shell, through with the thin-walled shell through location mounting hole clamping on the location frock, because the structural strength of installation boss is great, consequently can effectively avoid leading to the problem of solid of revolution shell deformation because of the clamping during finish machining to promote the machining precision of thin-walled shell.
Description
Technical Field
The application belongs to the technical field of machining of thin-wall parts, and particularly relates to a thin-wall shell and a machining method thereof.
Background
The thin-wall shell is a common aerospace product structural member, the part is a conical thin-wall revolving body structure, the inner side surface of the conical thin wall is provided with an annular bulge, and the annular bulge is provided with a plurality of hollow bosses.
When the part is machined, the part is forged to form a circular blank with a conical outer side surface, rough machining is carried out on the upper side and the lower side of the inner side surface of the circular blank to form a conical thin wall, an annular bulge and a hollow boss, and finally finish machining is carried out on the part.
Disclosure of Invention
This application aims at solving current thin-walled casing easily because of the clamping problem leads to the casing to warp when the finish machining to a certain extent at least, influences the technical problem of the machining precision of part. Therefore, the application provides a thin-wall shell and a processing method thereof.
The thin-walled shell that this application embodiment provided, its characterized in that, thin-walled shell includes:
a rotor housing;
the annular mounting bulge is fixed on the inner side surface of the annular mounting bulge;
the installation bosses are arranged on the annular installation bulges at intervals, hollow grooves are formed in the surfaces, far away from the annular installation bulges, of the installation bosses, and positioning installation holes used for being connected with a positioning tool are formed in the surfaces of the installation bosses.
In some embodiments, the positioning and mounting hole communicates with the hollow groove.
In some embodiments, the inner side surface and the outer side surface of the rotor casing are tapered, the rotor casing has a large-diameter end and a small-diameter end which are opposite to each other, the wall thickness of the mounting boss close to the large-diameter end is greater than that of the mounting boss close to the small-diameter end, and the positioning mounting hole is located in the side wall of the mounting boss close to the large-diameter end.
The embodiment of the application has at least the following beneficial effects:
this thin-walled shell is through setting up the solid shell of revolution, annular installation arch and a plurality of installation base, so that the installation of thin-walled shell adaptation on the spacecraft, the surface of installation base is provided with the location mounting hole that is used for being connected with the location frock, this location mounting hole corresponds with the mounting hole on the location frock, when carrying out the finish machining to the thin-walled shell, can clamp the thin-walled shell on the location frock through the location mounting hole, because the structural strength of installation base is great, consequently, can effectively avoid leading to the problem of solid shell of revolution deformation because of the clamping of finish machining, thereby promote the machining precision of thin-walled shell.
The thin-wall shell machining method provided by the embodiment of the application comprises the following steps:
s100: processing the wool to form an annular blank;
s200: roughly turning the outer side surface and the inner side surface of the annular blank to form a rotator shell and an annular bulge structure;
s300: roughly milling the annular boss structure to form an annular mounting boss and a plurality of mounting bosses, and forming a hollow groove and a positioning mounting hole in the mounting bosses to form the thin-wall shell;
s400: positioning and mounting the thin-wall shell on a positioning tool by utilizing the positioning mounting hole;
s500: and finishing the thin-wall shell.
In some embodiments, in step S500, finish turning is performed on the inner side surface and the outer side surface of the rotor shell, then finish milling is performed on the side of the annular mounting protrusion and the mounting boss away from the positioning mounting hole, and then finish milling is performed on the hollow groove.
In some embodiments, in step S200, a machining allowance of 1.4mm to 1.6mm is left on the inner side surface of the rotor shell when the inner side surface of the annular blank is roughly turned;
in the step S500, the thickness of the inner side surface of the swivel housing is finish-turned to be 1.4-1.6mm.
In some embodiments, in step S200, when the outer side surface of the annular blank is roughly turned, a machining allowance of 1.9mm to 2.1mm is left on the outer side surface of the rotor housing;
in the step S500, turning the outer side surface of the revolving body shell by 1.4-1.6mm;
after the step S500, turning the outer side surface of the revolving body shell by 0.4-0.6mm.
In some embodiments, in step S500, the distance between the lowest point of the inner side surface of the rotor case and the surface of the annular mounting protrusion is finely turned to be between 0.9 and 1.1 mm.
In some embodiments, after step S500, the thin-walled shell is positioned and mounted on a positioning tool through the mounting boss, and the annular mounting protrusion and one side of the mounting boss close to the positioning mounting hole are subjected to finish milling.
In some embodiments, in step S100, the annular blank is formed by forging, and after step S100, the annular blank is heat-treated
The embodiment of the application has at least the following beneficial effects:
when the annular bulge structure is roughly milled, the annular mounting bulge and the mounting bosses are formed on the inner side surface of the revolving body shell, the positioning mounting holes are formed in the mounting bosses, and the thin-wall shell is clamped on the positioning tool through the positioning mounting holes when the thin-wall shell is subjected to fine machining.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 shows a schematic structural diagram of a thin-walled shell in an embodiment of the present application;
FIG. 2 is a schematic view showing another angle structure of the thin-walled shell in the embodiment of the present application
FIG. 3 shows a schematic structural diagram of a spherical cutter in an embodiment of the present application;
FIG. 4 shows a schematic structural view of a spherical cutter and a thin-walled shell in an embodiment of the present application;
FIG. 5 shows a schematic structural diagram of a positioning tool and a thin-wall shell in an embodiment of the application
Fig. 6 shows a flow chart of a method for machining a thin-walled shell in an embodiment of the present application.
Reference numerals:
10-thin wall shell 11-revolving body shell 12-annular mounting bulge
13-mounting boss 20-positioning tool 21-fixing hole
22-mounting hole 23-pin 30-spherical cutter
31-handle 32-spherical tool bit 111-large diameter end
112-small-caliber end 131-hollow groove 132-positioning mounting hole.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Further, the present application may repeat reference numerals and/or reference letters in the various examples for simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The application is described below with reference to specific embodiments in conjunction with the following drawings:
in one embodiment of the present application, as shown in fig. 1-2 and 4-5, there is provided a thin-walled housing comprising:
a revolving body casing 11;
the annular mounting bulge 12, the annular mounting bulge 12 is fixed on the inner side surface of the annular mounting bulge 12;
the installation bosses 13 are arranged on the annular installation bulge 12 at intervals, one side, far away from the annular installation bulge 12, of each installation boss 13 is provided with a hollow groove 131, and the surface of each installation boss 13 is provided with a positioning installation hole 131 used for being connected with a positioning tool.
Specifically, the thin-wall shell 10 is installed by arranging the revolving body shell 11, the annular installation bulge 12 and the installation bosses 13, so that the thin-wall shell 10 is adapted to a spacecraft, when the inner side surface and the outer side surface of the finish machining revolving body and one side of the annular installation bulge 12, which is far away from the positioning installation hole 131, and the installation bosses 13 are arranged, the thin-wall shell 10 can be clamped on the positioning tool 20 through the positioning installation hole 131, and due to the fact that the structural strength of the installation bosses 13 is high, the problem that the revolving body shell 11 is deformed due to clamping during finish machining can be effectively avoided, and therefore the machining precision of the thin-wall shell 10 is improved.
In this embodiment, as shown in fig. 5, fixing holes 21 are provided around the positioning tool 20, mounting holes 22 for connecting with the positioning tool are provided on the top surface of the mounting boss 13, the positioning mounting holes 131 correspond to the mounting holes 22 on the positioning tool 20, and the number of the mounting holes 22 is the same as the number of the positioning mounting holes 131. During machining, the positioning tool 20 is fixed on a lathe through the fixing hole 21, the bottom surface of the mounting boss 13 is attached to the top surface of the positioning tool 20, the positioning mounting hole 131 corresponds to the mounting hole 22, and the pin 23 is installed in the positioning mounting hole 131 and the mounting hole 22, so that the thin-wall shell 10 can be mounted.
In another embodiment of the present application, as shown in fig. 1-2 and 5, the positioning and mounting hole 131 communicates with the hollow groove 131.
Specifically, when the pin 23 is installed in the positioning installation hole 131 and the installation hole 22, the pin 23 can directly pass through the positioning installation hole 131 and the installation hole 22 in sequence from the inner wall of the hollow groove 131, and convenience is provided for installation of the thin-walled shell 10 during processing.
In another embodiment of the present application, as shown in fig. 1 and 3-4, the inner side surface and the outer side surface of the rotor casing 11 are of a tapered structure, the rotor casing 11 has a large-diameter end 111 and a small-diameter end 112 opposite to each other, the wall thickness of the mounting boss 13 near the large-diameter end 111 is greater than that near the small-diameter end 112, and the positioning mounting hole 131 is located in the side wall of the mounting boss 13 near the large-diameter end 111.
Specifically, in order to meet the assembly requirement of the thin-wall shell 10, both the inner side surface and the outer side surface of the rotator housing 11 need to be set to be conical structures, and since the small-caliber end 112 of the rotator housing 11 is processed to be an inverted cone structure, the processing difficulty is high, and the positioning mounting hole 131 is arranged in the side wall of the mounting boss 13 close to the large-caliber end 111, so that convenience can be provided for clamping the small-caliber end 112 of the rotator housing 11, and the processing difficulty in processing the small-caliber end 112 of the rotator housing 11 can be reduced; and because the wall thickness close to the large-caliber end 111 is greater than that close to the small-caliber end 112, the stability of the thin-walled shell 10 during clamping can be further improved.
The processing method of the thin-wall shell provided by the embodiment of the application, as shown in fig. 6, includes the following steps:
s100: processing the blank to form an annular blank;
s200: roughly turning the outer side surface and the inner side surface of the annular blank to form a revolving body shell 11 and an annular protruding structure;
s300: roughly milling the annular boss structure to form an annular mounting boss 12 and a plurality of mounting bosses 13, and forming a hollow groove 131 and a positioning mounting hole 132 in the mounting bosses to form the thin-walled shell 10;
s400: positioning and mounting the thin-wall shell 10 on a positioning tool 20 by using the positioning mounting hole 132;
s500: finishing the thin-walled casing 10.
Specifically, when the annular protrusion structure is roughly milled, the annular mounting protrusion 12 and the mounting bosses 13 are formed on the inner side surface of the revolving body shell 11, the positioning mounting holes 131 are formed in the mounting bosses 13, and when the thin-wall shell 10 is precisely machined, the thin-wall shell 10 is clamped on the positioning tool 20 through the positioning mounting holes 131, so that the problem that the revolving body shell 11 is deformed due to the clamping problem during the precise machining of the thin-wall shell 10 can be effectively solved through the machining method, and the machining precision of the thin-wall shell 10 is improved.
In this embodiment, the upper and lower side surfaces and end surfaces of the annular protrusion structure are rough milled to form an annular mounting protrusion 12 and a plurality of mounting bosses 13
In this embodiment, further, in step S200, the outer side surface and the inner side surface of the formed revolving body housing 11 are both of a tapered structure, in step S300, firstly, a rough milling is performed on one side of the rough milling annular protruding structure close to the large-aperture end 111 of the revolving body housing 11 to form the positioning mounting hole 131, and then, when the rough milling annular protruding structure is close to one side of the small-aperture end 112 of the revolving body housing 11, the part is clamped on the positioning tool 20 through the positioning mounting hole 131 to perform rough milling on the part. Through the mode, when the part is roughly milled, the part can be positioned and installed through the positioning installation hole 131, convenience is provided for the clamping work of the part, and meanwhile, the deformation generated in the process of roughly milling the part is effectively reduced.
In another embodiment of the present application, in step S500, the inner side surface and the outer side surface of the rotor case 11 are finish-turned, the side of the annular mounting protrusion 12 and the mounting boss 13 away from the positioning mounting hole 131 is finish-milled, and the hollow groove 131 is finish-milled.
Specifically, the inner side surface and the outer side surface of the revolving body shell 11 are subjected to finish turning, then the side, away from the positioning mounting hole 131, of the annular mounting protrusion 12 and the mounting boss 13 is subjected to finish milling, and the hollow groove 131 is subjected to finish milling, so that the thin-wall shell 10 is subjected to finish machining.
In another embodiment of the present application, in step S200, a machining allowance of 1.4mm to 1.6mm is left on the inner side surface of the rotator housing 11 when the inner side surface of the annular blank is roughly turned;
in step S500, the inner side of the swivel housing 11 is turned 1.4-1.6mm.
Specifically, in step S200, the machining allowance of 1.4mm to 1.6mm is set, so that the inner side surface of the rotator housing 11 is not affected by finish turning, and at the same time, the rotator housing 11 is prevented from being deformed due to excessive machining allowance during finish turning, and in step S500, all the machining allowances of 1.4mm to 1.6mm are left by turning, so as to finish the finish machining of the inner side surface of the rotator housing 11.
In the present embodiment, further, in step S200, the machining allowance of the inner surface of the rotator housing 11 is 1.5mm; and in step S500 the inner side of the swivel housing 11 is turned 1.5mm.
In another embodiment of the present application, in step S200, a machining allowance of 1.9mm to 2.1mm is left on the outer side surface of the rotator housing 11 when the outer side surface of the annular blank is roughly turned;
in step S500, turning the outer side surface of the rotor shell 11 by 1.4-1.6mm;
after step S500, the outer side surface of the rotor case 11 is turned by 0.4-0.6mm.
Specifically, since the deformation of the rotator housing 11 may occur during the finish machining of the thin-walled housing 10, which may affect the assembly of the thin-walled housing 10, in step S200, a large machining allowance is left on the outer side surface of the rotator housing 11, and therefore, in step S500, the outer side surface of the rotator housing 11 is turned by 1.4 to 1.6mm, which may effectively reduce the deformation generated during the turning of the rotator housing 11, and at the same time, a machining allowance of 0.4 to 0.6mm may be left for the subsequent finish machining of the outer side surface of the rotator housing 11, thereby further improving the machining accuracy of the thin-walled housing 10.
In the present embodiment, further, in step S200, a machining allowance of 2.0mm is left on the outer side surface of the rotor case 11, in step S500, the outer side surface of the rotor case 11 is turned by 1.5mm, and after step S500, the outer side surface of the rotor case 11 is turned by 0.5mm.
In another embodiment of the present application, in step S500, the distance between the lowest point of the inner side surface of the finish turning body shell 11 and the surface of the annular fitting projection 12 is between 0.9 and 1.1 mm.
Specifically, as shown in fig. 4, a point a on the inner side surface of the revolving body housing 11 in the drawing is the lowest point when the revolving body housing 11 is at the finish time, and the distance between the lowest point a and the surface of the annular mounting protrusion 12 is between 0.9 mm and 1.1 mm. After the inner side surface of the revolving body shell 11 is finely turned, the upper and lower surfaces of the annular mounting protrusion 12 need to be finely milled, the lowest point a is a tool connecting point which is formed by finely turning the inner side surface of the revolving body shell 11 and finely milling the upper and lower surfaces of the annular mounting protrusion 12, a fillet is arranged between the inner side surface of the revolving body shell 11 and the upper and lower surfaces of the annular mounting protrusion 12, the lowest point a is positioned at the fillet, the tool connecting point is arranged at a position 0.9-1.1mm away from the surface of the mounting protrusion, so that a tool connecting table is avoided when the tool is connected by finely turning and finely milling, and the processing precision of the thin-wall shell 10 is improved.
In this embodiment, the inner surface of the turning rotor housing 11 can be turned by the spherical cutter 30, and as shown in fig. 3, the spherical cutter 30 includes a shank 31 and a spherical cutter head 32, and the spherical cutter head 32 is provided at an end of the shank 31. The distance between the lowest point of the inner side surface of the revolving body shell 11 and the surface of the annular mounting protrusion 12 is conveniently processed to be 0.9-1.1mm by arranging the spherical cutter head 32, the processing difficulty of the inner side surface of the revolving body shell 11 is reduced, and the processing precision of the inner side surface of the revolving body shell is improved.
In the present embodiment, further, the distance between the lowest point of the inner side surface of the finish turning rotor case 11 and the surface of the annular mounting boss 12 is 1.0mm.
In another embodiment of the present application, after step S500, the thin-walled casing 10 is positioned and mounted on the positioning tool 20 through the mounting boss 13, and the sides of the annular mounting protrusion 12 and the mounting boss 13 close to the positioning mounting hole 131 are finish-milled.
Specifically, when the side of the annular mounting boss 12 and the mounting boss 13 close to the positioning mounting hole 131 is finely milled, the thin-walled housing 10 can be positioned and mounted on a milling machine by the mounting boss 13 away from the positioning mounting hole 131, so that the thin-walled housing 10 can be clamped, and deformation generated when the thin-walled housing 10 is finely milled can be reduced.
In another embodiment of the present application, the ring-shaped blank is heat-treated before step S200.
Specifically, after the workpiece is forged to form the annular blank, the annular blank is subjected to heat treatment in time, so that thermal strain after the workpiece is forged can be effectively avoided, and convenience is provided for subsequent rough machining of the annular blank.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise" indicate orientations or positional relationships that are based on the orientations or positional relationships illustrated in the figures, but are used for convenience in describing the present application and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus, are not to be considered limiting of the present application.
It should be noted that all the directional indications in the embodiments of the present application are only used to explain the relative position relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like 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 present application. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. A method for processing a thin-wall shell is characterized by comprising the following steps:
s100: processing the wool to form an annular blank;
s200: roughly turning the outer side surface and the inner side surface of the annular blank to form a rotator shell and an annular bulge structure;
s300: roughly milling the annular boss structure to form an annular mounting boss and a plurality of mounting bosses, and forming a hollow groove and a positioning mounting hole in the mounting bosses to form the thin-wall shell;
s400: positioning and mounting the thin-wall shell on a positioning tool by utilizing the positioning mounting hole;
s500: finish machining the thin-walled shell;
after the step S500, positioning and mounting the thin-wall shell on a positioning tool through the mounting boss, and performing finish milling on the annular mounting boss and one side of the mounting boss close to the positioning mounting hole;
in the step S100, the annular blank is formed by forging, and after the step S100, the annular blank is heat-treated;
the thin-walled housing includes:
a rotor housing; the annular mounting bulge is fixed on the inner side surface of the revolving body shell; the mounting bosses are arranged on the annular mounting protrusion at intervals, hollow grooves are formed in the surfaces, far away from the annular mounting protrusion, of the mounting bosses, and positioning mounting holes used for being connected with a positioning tool are formed in the surfaces of the mounting bosses;
the positioning mounting hole is communicated with the hollow groove;
the inner side surface and the outer side surface of the rotary body shell are of conical structures, the rotary body shell is provided with a relative large-caliber end and a relative small-caliber end, the installation boss is close to the wall thickness of the large-caliber end is larger than the wall thickness of the small-caliber end, and the positioning installation hole is located in the side wall of the large-caliber end, close to the installation boss.
2. The method of manufacturing a thin-walled housing of claim 1,
in the step S500, finish-turning the inner side surface and the outer side surface of the rotor case, finish-milling the side of the annular mounting protrusion and the mounting boss away from the positioning mounting hole, and finish-milling the hollow groove.
3. A method of manufacturing a thin-walled casing as claimed in claim 2,
in the step S200, when the inner side surface of the annular blank is roughly turned, a machining allowance of 1.4mm to 1.6mm is left on the inner side surface of the rotor shell;
in the step S500, the thickness of the inner side surface of the rotor case is finely turned to be 1.4-1.6mm.
4. The method of manufacturing a thin-walled shell according to claim 2,
in the step S200, when the outer side surface of the annular blank is roughly turned, a machining allowance of 1.9mm to 2.1mm is left on the outer side surface of the rotor shell;
in the step S500, turning the outer side surface of the revolving body shell by 1.4-1.6mm;
and after the step S500, turning the outer side surface of the revolving body shell by 0.4-0.6mm.
5. The method of manufacturing a thin-walled shell according to claim 2,
in the step S500, the distance between the lowest point of the inner side surface of the swivel shell and the surface of the annular mounting protrusion is finely turned to be between 0.9 and 1.1 mm.
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| CN202111324476.7A CN114012362B (en) | 2021-11-10 | 2021-11-10 | Machining method of thin-wall shell |
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| CN202111324476.7A CN114012362B (en) | 2021-11-10 | 2021-11-10 | Machining method of thin-wall shell |
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| CN211351969U (en) * | 2020-01-20 | 2020-08-25 | 菲仕绿能科技(宁波)有限公司 | Friction stir welding water-cooling shell for motor |
| CN213496574U (en) * | 2020-11-12 | 2021-06-22 | 航天科工哈尔滨风华有限公司 | Tool for machining thin-walled cylinder by positive and negative expansion of double taper sleeve |
| CN112643572B (en) * | 2020-11-20 | 2022-11-25 | 惠阳航空螺旋桨有限责任公司 | Thin-wall shell part inner hole clamping and positioning tool |
| CN113500181B (en) * | 2021-08-24 | 2022-08-30 | 中南大学 | Rotary extrusion forming method of reinforced cylinder shell |
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2021
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