CN107138586A - A kind of structure of cutting somebody's hair for being used to seal multilayer pipe - Google Patents
A kind of structure of cutting somebody's hair for being used to seal multilayer pipe Download PDFInfo
- Publication number
- CN107138586A CN107138586A CN201710559935.7A CN201710559935A CN107138586A CN 107138586 A CN107138586 A CN 107138586A CN 201710559935 A CN201710559935 A CN 201710559935A CN 107138586 A CN107138586 A CN 107138586A
- Authority
- CN
- China
- Prior art keywords
- correcting section
- hair
- pipe
- cutting somebody
- delivery pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/045—Closing or sealing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/049—Deforming bodies having a closed end
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/051—Deforming double-walled bodies
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The present invention relates to tubular object extruding field, more particularly to a kind of structure of cutting somebody's hair for being used to seal multilayer pipe, it at least includes the first correcting section, the second correcting section, thrust platform, and the second correcting section is located at one end of the first correcting section, and thrust platform is located at the one end of the second correcting section away from the first correcting section；First correcting section, the second correcting section, the sectional area of thrust platform are successively by big；Structure of cutting somebody's hair is interior to be axially arranged with through the first correcting section, the second correcting section, the first delivery pipe of thrust platform along it, and the second correcting section is interior to be provided with the second delivery pipe that is vertical and connecting the first delivery pipe, and the second delivery pipe is through the second correcting section.The present invention is simple in construction, easy to process, simplifies process.
Description
Technical field
The present invention relates to pipeline processing field, more particularly to a kind of structure of cutting somebody's hair for being used to seal multilayer pipe.
Background technology
Axial plus side thrust carries out feed supplement while forming high pressure in pipe is by being pressurizeed to tubing internal filled liquid, forces
Tube billet fits to mold cavity under the pressure effect of pressure medium, realizes a kind of technique of pipe shaping.In its tubing
The pressure of portion's topping up pressurization is generally up to 100MPa-400MPa, and most formation of parts need to also keep one under its high pressure conditions
The packing state of section time can be only achieved preferable forming effect, therefore the quality of its end sealing structure, directly influence superelevation
Can pressure condition be realized, so that can have influence on tubing part forming get a desired effect, so end sealing structure is fine or not
It is most important for internal high pressure forming technique., it is necessary to which each tube layer progress to multilayer pipe is close before multilayer pipe processing
Envelope, in order that turning into hollow state between the adjacent tube layer side wall of multilayer pipe, it is necessary to being noted between each tube layer side wall of multilayer pipe
Enter highly pressurised liquid and carry out expansion processing.According to current technology, this process needs to be divided into two steps, the first step, recruitment
Tool is gap of being cracked between the adjacent tube wall of multilayer pipe.Second step, is opened with the seal for pipe joints and the first step cut somebody's hair multilayer pipe
High-pressure fluid is injected in gap so that multilayer pipe is molded.The time that this processing method is spent it is longer and also be easy to occur deviation and
Reduce the quality of product.
The content of the invention
There is provided a kind of structure of cutting somebody's hair for being used to seal multilayer pipe, its structure to solve existing technological deficiency by the present invention
Simply, it is easy to process, multilayer pipe can disposably be processed.Its specific technical scheme is as follows：
The present invention discloses a kind of structure of cutting somebody's hair for being used to seal multilayer pipe, at least includes the first correcting section, the second correcting
Section, thrust platform, the second correcting section is located at one end of the first correcting section, and thrust platform is located at the second correcting section away from the first correcting section
One end；First correcting section, the second correcting section, the sectional area of thrust platform are successively by big；Along the axial direction for structure of cutting somebody's hair in structure of cutting somebody's hair
Provided with the first correcting section, the second correcting section, the first delivery pipe of thrust platform, the second correcting section provided with vertical and connect the
Second delivery pipe of one delivery pipe, the second delivery pipe is through the second correcting section.
Further, the second correcting section includes the first stop portion, guide portion and the second stop portion being sequentially connected, and second stops
Stay portion compared with the first stop portion close to thrust platform, the size in the second stop portion is more than the size in the first stop portion, and guide portion is stage body.
Further, the second delivery pipe runs through the first stop portion.
Further, the first correcting section, the second correcting section and thrust platform are formed in one.
Further, the first delivery pipe, the cross sectional shape of the second delivery pipe are circular or square.
Further, the first correcting section and thrust platform are cylindrical, and the second correcting section is in cone mesa-shaped.
Further, in addition to the 3rd correcting section, the 3rd correcting section located at thrust platform and the second correcting section between, the 3rd
The sectional area of correcting section is less than the sectional area of thrust platform, the sectional area more than the second correcting section.
Further, the 3rd correcting section includes the 3rd stop portion, the second guide portion, the 4th stop portion being sequentially connected, the
The size in four stop portions is more than the size in the 3rd stop portion, and the second guide portion is stage body.
Further, the first delivery pipe is conveyed in the 3rd correcting section, the 3rd correcting section provided with vertical and connection first
3rd delivery pipe of pipe, the 3rd delivery pipe runs through the 3rd stop portion.
Further, the one end of the first correcting section away from the second correcting section is provided with chamfering.
Beneficial effects of the present invention：The present invention can widen the mouth of pipe of multilayer pipe so as to produce seam between each layer pipe side wall
Gap, and process can be simplified to the gap conveying high-pressure fluid between each layer pipe side wall, improve processing efficiency.
Brief description of the drawings
Fig. 1 is overall structure figure of the invention；
Fig. 2 is working state schematic representation of the invention；
Fig. 3 is the enlarged drawing at the A positions of the present invention；
Fig. 4 promotes the schematic diagram of multilayer pipe for the structure of cutting somebody's hair of the present invention；
Fig. 5 is the schematic diagram after first layer pipe of the invention is separated with second layer pipe.
Marked in figure：Bimetallic tube 10, first layer pipe 101, second layer pipe 102, gap 108, structure of cutting somebody's hair 320, first is defeated
Send pipe 321, the second delivery pipe 322, the first correcting section 326, chamfering 327, thrust platform 328, the second correcting section 329, the first stop
Portion 3291, guide portion 3292, the second stop portion 3293, mould 220.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise " are, based on orientation shown in the drawings or position relationship, to be for only for ease of
The description present invention and simplified description, rather than indicate or imply that the device or element of meaning must have specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In the description of the invention, " multiple " are meant that two or more,
Unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；It can be machine
Tool is connected or electrically connected；Can be joined directly together, can also be indirectly connected to by intermediary, can be two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under "
Can directly it be contacted including the first and second features, it is not direct contact but by it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special
Levy directly over second feature and oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " fisrt feature that includes are immediately below second feature and obliquely downward, or be merely representative of
Fisrt feature level height is less than second feature.
The present invention is described in further detail below by embodiment combination accompanying drawing.Fig. 1 is referred to Fig. 5.
The present invention disclose it is a kind of be used to seal the structure 320 of cutting somebody's hair of multilayer pipe, at least include the first correcting section 326, the
Two correctings section 329, thrust platform 328, the second correcting section 329 are located at second located at one end of the first correcting section 326, thrust platform 328
The one end of correcting section 329 away from the first correcting section 326；The one end of first correcting section 326 away from the second correcting section is provided with chamfering 327
So that the first correcting section 326 is easier to enter multilayer pipe.First correcting the 326, second correcting of section section 329, the three of thrust platform 328 are
Be integrally formed and three sectional area successively by big, therefore the first correcting the 326, second correcting of section section 329, thrust platform 328 3
Person constitutes step-like；Being axially arranged with through structure 320 of cutting somebody's hair for conveying height along structure 320 of cutting somebody's hair in structure of cutting somebody's hair 320
Press fluid the first delivery pipe 321, that is to say, that the first delivery pipe 321 through the first correcting section the 326, second correcting section 329,
Thrust platform 328.Provided with vertical and the first delivery pipe 321 of connection second for conveying high-pressure fluid in second correcting section 329
Delivery pipe 322, the second delivery pipe 322 is through the both sides of the second correcting section 329.
Further, the second correcting section 329 is stopped including the first stop portion 3291 being sequentially connected, guide portion 3292 and second
Portion 3293 is stayed, the second stop portion 3293 is stopped close to thrust platform 328, the first stop portion 3291 close to the first correcting section 326, second
The size in portion 3293 is more than the size in the first stop portion 3291, and guide portion 3292 is frustum, therefore, from the point of view of surface, from the
One stop portion 3291 toward the part of the transition of the second stop portion 3293 be inclined.
Further, the second delivery pipe 322 is located just at the first stop portion 3291 through the position of the second correcting section 329.
Further, the first delivery pipe 321, the cross sectional shape of the second delivery pipe 322 are circular or square, are preferably justified
Shape.
Further, the first correcting section 326 and thrust platform 328 are cylindrical, and the second correcting section 329 is in cone mesa-shaped.
Further, according to actual conditions needs, structure of cutting somebody's hair 320 can also include the 3rd correcting section, the 3rd correcting section
Located at the correcting of thrust platform 328 and second section 329 between, the first correcting section the 326, second correcting section the 329, the 3rd correcting section, only
Push away platform 328 to be formed in one, in step-like.The sectional area of 3rd correcting section is less than the sectional area of thrust platform 328, led more than second
The sectional area of positive section 329.3rd correcting section includes the 3rd stop portion, guide portion 3292, the 4th stop portion being sequentially connected.First
Delivery pipe 321 is provided with the 3rd delivery pipe that is vertical and connecting the first delivery pipe 321 in the 3rd correcting section, the 3rd correcting section,
3rd delivery pipe runs through the 3rd stop portion.3rd stop portion is close to the second correcting section 329, and the 4th stop portion is close to thrust platform 328.
The size in the 4th stop portion is more than the size in the 3rd stop portion, and the second guide portion 3292 is frustum.The shape of 3rd correcting section
It is identical with the second correcting section 329, but the size of the 3rd correcting section is bigger than the size of the second correcting section 329.According to actual needs,
The 4th correcting section, the 5th correcting section and more with the 3rd can also be set gradually between the correcting of thrust platform 328 and the 3rd section
Correcting section, the second correcting section 329 shape is identical but size gradually big correcting section
Further, the first delivery pipe 321 in the 3rd correcting section, the 3rd correcting section provided with vertical and to connect first defeated
The 3rd delivery pipe of pipe 321 is sent, the 3rd delivery pipe runs through the 3rd stop portion
The operation principle of the present invention：
Embodiment 1
In the present embodiment, multilayer pipe is the structure of bimetallic tube 10, and first layer pipe 101 is than the second layer pipe that is linked in outside it
102 is short, and bimetallic tube 10 have passed through after dilatancy, and the tube wall of each layer pipeline of multilayer pipe can fit together, ensuing to add
Work step is rapid, it is necessary to use structure 320 disclosed in this invention of cutting somebody's hair, in order to corresponding with bimetallic tube 10, and the present embodiment is cut somebody's hair
Structure 320 includes the first correcting the 326, second correcting of section section 329, thrust platform 328.Its process is:Bimetallic tube 10 is put into mould
In tool 220, cutting somebody's hair, structure 320 is promoted in the end of bimetallic tube 10, is entered in structure 320 of cutting somebody's hair in bimetallic tube 10 and is not yet entered
Before one step is promoted, as shown in Figure 2 and Figure 3, first layer pipe 101 is in the position of the first correcting section 326, and second layer pipe 102 is first
The position in stop portion 3291.Due to cut somebody's hair structure 320 by the first correcting section the 326, second correcting section 329, the three of thrust platform 328 by
It is stepped to be formed by connecting, therefore structure 320 of cutting somebody's hair is with two step surfaces, during structure 320 of cutting somebody's hair is promoted, such as Fig. 4,
Shown in Fig. 5, the step surface that first layer pipe 101 can be formed to conjunction between the first correcting section 326 and the second correcting section 329, and the
Two layers of pipe 102 can then move past guide portion 3292, in the moving process, and the mouth of pipe of second layer pipe 102 can be expanded so that the second layer
Gap 108 is produced between pipe 102 and first layer pipe 101.The end of second layer pipe 102 can finally move on to the second stop portion 3293 simultaneously
On the step surface that conjunction is formed between the second correcting section 329 and thrust platform 328.Finally, two step surfaces support close the respectively
On one layer of pipe 101, the pipe end of second layer pipe 102, sealing pipe end can be played and axial thrust is provided to pipe end
Effect.After the completion of sealing, will pass through the second delivery pipe 322 toward side wall and the first layer pipe 101 of second layer pipe 102 side wall it
Between the injection of gap 108 high-pressure fluid, the side wall of second layer pipe 102 is in the presence of high-pressure fluid away from first layer pipe 101
Side wall, until the side wall of second layer pipe 102 supports the inner surface closed in mould, the shape between first layer pipe 101 and second layer pipe 102
Into hollow state.Meanwhile, in order to keep the geomery of first layer pipe 101 constant, structure of cutting somebody's hair 320 passes through the first delivery pipe
321 inject high-pressure fluid into first layer pipe 101, because the first delivery pipe 321 is connected with the second delivery pipe 322, according to Perth
The pressure being subject to inside and outside card principle, the side wall of first layer pipe 101 is identical, therefore its shape does not change.
In the description of this specification, reference term " embodiment ", " some embodiments ", " an implementation
The description of example ", " some embodiments ", " example ", " specific example " or " some examples " etc. means to combine the embodiment or example
Specific features, structure, material or the feature of description are contained at least one embodiment of the present invention or example.In this explanation
In book, identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term.Moreover, the specific spy of description
Levy, structure, material or feature can in an appropriate manner be combined in any one or more embodiments or example.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this hair
Bright specific implementation is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made.
Claims (10)
1. a kind of structure of cutting somebody's hair for being used to seal multilayer pipe, at least includes the first correcting section, the second correcting section, thrust platform, institute
The second correcting section is stated located at one end of first correcting section, the thrust platform is located at second correcting section away from described first
One end of correcting section；It is characterized in that:
The first correcting section, the second correcting section, the sectional area of thrust platform are successively by big；Cut somebody's hair in the structure of cutting somebody's hair along described
Structure is axially arranged with through first correcting section, second correcting section, the first delivery pipe of the thrust platform, described the
The second delivery pipe that is vertical and connecting first delivery pipe is provided with two correctings section, second delivery pipe runs through described second
Correcting section.
2. a kind of structure of cutting somebody's hair for being used to seal multilayer pipe as claimed in claim 1, it is characterised in that the second correcting section
Including the first stop portion being sequentially connected, guide portion and the second stop portion, the first stop portion of the second stop portion is leaned on
The nearly thrust platform, the size in the second stop portion is more than the size in the first stop portion, and the guide portion is stage body.
3. a kind of structure of cutting somebody's hair for being used to seal multilayer pipe as claimed in claim 2, it is characterised in that second delivery pipe
Through the first stop portion.
4. a kind of structure of cutting somebody's hair for being used to seal multilayer pipe as claimed in claim 1, it is characterised in that first correcting
Section, second correcting section and the thrust platform are formed in one.
5. a kind of structure of cutting somebody's hair for being used to seal multilayer pipe as claimed in claim 1, it is characterised in that first conveying
Pipe, the cross sectional shape of the second delivery pipe are circular or square.
6. a kind of structure of cutting somebody's hair for being used to seal multilayer pipe as claimed in claim 1, it is characterised in that the first correcting section
And the thrust platform is cylindrical, the second correcting section is in cone mesa-shaped.
7. a kind of structure of cutting somebody's hair for being used to seal multilayer pipe as described in any one of claim 1 to 6, it is characterised in that also wrap
The 3rd correcting section is included, the 3rd correcting section is located between the thrust platform and the second correcting section, the 3rd correcting section
Sectional area is less than the sectional area of the thrust platform, the sectional area more than second correcting section.
8. a kind of structure of cutting somebody's hair for being used to seal multilayer pipe as claimed in claim 7, it is characterised in that the 3rd correcting section
Including the 3rd stop portion, the second guide portion, the 4th stop portion being sequentially connected, the size in the 4th stop portion is more than described the
The size in three stop portions, second guide portion is stage body.
9. a kind of structure of cutting somebody's hair for being used to seal multilayer pipe as claimed in claim 8, it is characterised in that first delivery pipe
Through the 3rd correcting section, the 3rd delivery pipe that is vertical and connecting first delivery pipe is provided with the 3rd correcting section,
3rd delivery pipe runs through the 3rd stop portion.
10. a kind of structure of cutting somebody's hair for being used to seal multilayer pipe as described in any one of claim 1 to 5, it is characterised in that described
The one end of first correcting section away from second correcting section is provided with chamfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710559935.7A CN107138586B (en) | 2017-07-11 | 2017-07-11 | A kind of structure of cutting somebody's hair for sealing multilayer pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710559935.7A CN107138586B (en) | 2017-07-11 | 2017-07-11 | A kind of structure of cutting somebody's hair for sealing multilayer pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107138586A true CN107138586A (en) | 2017-09-08 |
| CN107138586B CN107138586B (en) | 2018-10-19 |
Family
ID=59776303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710559935.7A Active CN107138586B (en) | 2017-07-11 | 2017-07-11 | A kind of structure of cutting somebody's hair for sealing multilayer pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107138586B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427837A (en) * | 2018-03-06 | 2018-08-21 | 南昌航空大学 | A kind of assembly rough error determination method and system |
| CN110666022A (en) * | 2019-09-30 | 2020-01-10 | 北京星航机电装备有限公司 | Preparation method of high-temperature alloy semi-closed double-layer thin-wall-structure adapter tube |
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| US5170557A (en) * | 1991-05-01 | 1992-12-15 | Benteler Industries, Inc. | Method of forming a double wall, air gap exhaust duct component |
| US5189790A (en) * | 1990-06-22 | 1993-03-02 | Benteler Aktiengesellschaft | Method of fabricating a double walled pipe elbow |
| DE4428435A1 (en) * | 1994-08-11 | 1996-02-15 | Huber & Bauer Gmbh | Production method for air gap insulated tube |
| DE19511970A1 (en) * | 1995-04-18 | 1996-10-24 | Werdau Fahrzeugwerk | Forming double=walled tubing for air ducting or car industry |
| DE19513559C2 (en) * | 1995-04-18 | 1997-09-25 | Werdau Fahrzeugwerk | Device for producing deformed multi-walled tubes with one or more cavities between the walls |
| CN104307956A (en) * | 2014-06-30 | 2015-01-28 | 刘正彬 | Manufacturing method for header inner container of solar water heater |
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2017
- 2017-07-11 CN CN201710559935.7A patent/CN107138586B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5189790A (en) * | 1990-06-22 | 1993-03-02 | Benteler Aktiengesellschaft | Method of fabricating a double walled pipe elbow |
| US5170557A (en) * | 1991-05-01 | 1992-12-15 | Benteler Industries, Inc. | Method of forming a double wall, air gap exhaust duct component |
| DE4428435A1 (en) * | 1994-08-11 | 1996-02-15 | Huber & Bauer Gmbh | Production method for air gap insulated tube |
| DE19511970A1 (en) * | 1995-04-18 | 1996-10-24 | Werdau Fahrzeugwerk | Forming double=walled tubing for air ducting or car industry |
| DE19513559C2 (en) * | 1995-04-18 | 1997-09-25 | Werdau Fahrzeugwerk | Device for producing deformed multi-walled tubes with one or more cavities between the walls |
| CN104307956A (en) * | 2014-06-30 | 2015-01-28 | 刘正彬 | Manufacturing method for header inner container of solar water heater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427837A (en) * | 2018-03-06 | 2018-08-21 | 南昌航空大学 | A kind of assembly rough error determination method and system |
| CN110666022A (en) * | 2019-09-30 | 2020-01-10 | 北京星航机电装备有限公司 | Preparation method of high-temperature alloy semi-closed double-layer thin-wall-structure adapter tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107138586B (en) | 2018-10-19 |
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