CN106475739A - The nozzle member of fuel injector and its manufacture method - Google Patents
The nozzle member of fuel injector and its manufacture method Download PDFInfo
- Publication number
- CN106475739A CN106475739A CN201510532021.2A CN201510532021A CN106475739A CN 106475739 A CN106475739 A CN 106475739A CN 201510532021 A CN201510532021 A CN 201510532021A CN 106475739 A CN106475739 A CN 106475739A
- Authority
- CN
- China
- Prior art keywords
- nozzle member
- hole section
- guiding hole
- fuel injector
- section
- 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.)
- Granted
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Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
This application discloses a kind of method of the nozzle member of manufacture fuel injector, final structure is made it have including roughing nozzle member, the nozzle member of final structure has first end face and middle cascaded surface, the first end face of the nozzle member and middle cascaded surface are oppositely directed to, the nozzle member limits the endoporus of the elongated needle valve member for being suitable to house the fuel injector, and the endoporus includes to guide hole section；In the case of applying impressed pressure in the first end face of the nozzle member and middle cascaded surface, finish further and the guiding hole section for obtaining is machined in above-mentioned steps so that the guiding hole section has predetermined the first guiding hole section shape of cross section and first for being suitable for that the oil-fuel injector needle-valve being introduced in which is carried out in which expecting slip and guides hole section radial dimension；After the completion of the finishing operations, the impressed pressure is removed.The application further relates to the nozzle member in this way manufacturing and the fuel injector including said nozzle part.
Description
Technical field
The application is related to a kind of method of the nozzle member of manufacture fuel injector, according to the nozzle of this method manufacture
Part, and the fuel injector including this nozzle member.
Background technology
High pressure fuel injector is generally by the injector body being secured together by fastening nut and nozzle member
Composition, needle-valve are placed in nozzle member.
Fig. 1 a-1b shows the schematic diagram in the pilot hole grinding stage of nozzle member 50 in the prior art,
Fig. 1 c-1d and Fig. 1 f-1g are respectively illustrated before and after nozzle member 50 is assembled to injector body
Schematic diagram.
Nozzle member 50 includes the first end face for being adapted to abut against telophragma after fuel injector main body is fixed to
12 and middle the cascaded surface 14 of securing member respective surfaces is adapted to abut against, and limits and be suitable to accommodate carefully
The endoporus 30 of long needle valve member.Endoporus 30 includes the guiding hole section 32 for originating in first end face 12, leads to
The second hole section 36 that high-pressure chamber 34 is connected is crossed with guiding hole section 32.The internal diameter of the second hole section 36 is big
In the internal diameter of guiding hole section 32, so as to the corresponding of the inner surface in the second hole section 36 and elongated needle valve member
The gap of high-pressure oil flow warp is formed between outer surface.
The inner surface of guiding hole section 32 is generally formed by grinding, and Fig. 1 a and 1b are shown respectively
The longitudinal sectional view of the nozzle member 50 in Grinding Process and top view.Emery wheel 80 is shown
For in Fig. 1 a, to guiding hole section 32 to execute grinding action.As shown in Figure 1 b, guide
Hole section 32 is ground and is processed as with circular shape of cross section.
After the completion of Fig. 1 c and 1d respectively illustrate grinding action, nozzle member 50 is assembled and is fixed to spray
Longitudinal sectional view and top view before oily device body, can be seen that guiding hole section 32 from Fig. 1 d
Shape of cross section is still perfectly round.
Fig. 1 e shows to be assembled to according to the nozzle member 50 of prior art and is formed after injector body
The external view of fuel injector, in figure show the securing member 60 of fixed nozzle part 50 and fuel injector
Injector body 70.Fig. 1 f and 1g respectively illustrate the spray being fixed to after injector body 70
The longitudinal sectional view of mouth 50 and top view.
Now, the nozzle member 50 after injector body 70 is fixed in first end face 12 and centre
The pressure that other parts (disk component and securing member in the middle of for example) apply is subject between cascaded surface 14
F (Fig. 1 f), guides the material deformation at certain or some positions around hole section 32 to cause guiding hole section 32
Shape of cross section become irregular shape.Fig. 1 g shows erose guiding hole section 32
An illustrative example.At this moment, elongated needle valve member is inserted endoporus 30, in guiding hole section 32
Undesirable friction can occur between inner surface and the outer surface of needle valve member.
Want to avoid the generation of above-mentioned phenomenon.
Content of the invention
The purpose of the application is to overcome drawbacks described above by changing the manufacture method of nozzle member, it is to avoid spray
The outer surface of the mouth inner surface of endoporus and the needle valve member being inserted into after by fixing fuel injector body is not
Symbol, or even rub.
Method according to the nozzle member of the manufacture fuel injector of the application includes：
Roughing nozzle member makes it have final structure, and the nozzle member of final structure has by fastening
When part is fixed to the injector body of the fuel injector towards injector body first end face and with described
The middle cascaded surface of securing member contact, the first end face of the nozzle member and the contrary court of middle cascaded surface
To the nozzle member limits the endoporus of the elongated needle valve member for being suitable to house the fuel injector, described interior
Hole includes the guiding hole section between the first end face and middle cascaded surface；
Apply impressed pressure relative to each other in the first end face of the nozzle member and middle cascaded surface
In the case of, finish further and the guiding hole section for obtaining is machined in above-mentioned steps so that described draw
Guide hole section has and is suitable for carrying out in which expecting the predetermined of slip by the oil-fuel injector needle-valve being introduced in which
First guiding hole section shape of cross section and first guiding hole section radial dimension；With
After the completion of the finishing operations, the impressed pressure is removed.
According to possible embodiments, the impressed pressure be fixed to the fuel injector in nozzle member
The operating pressure that bears in the case of body is equal, or both differences are in an allowed band.
According to possible embodiments, the cross section of the guiding hole section generated in roughing step
The nozzle member being sized such that when the impressed pressure is applied on nozzle member after deformation
Maximum radial dimension is less than the first predetermined guiding hole section radial dimension.
According to possible embodiments, the further finishing operations complete and remove impressed pressure
Afterwards, the guiding hole section presents the second guiding hole section shape of cross section and the second guiding hole section footpath
To size.
According to possible embodiments, the second guiding hole section shape of cross section and the second guiding hole section
Radial dimension is different from the first predetermined guiding hole section shape of cross section and the first guiding hole section radial direction
Size.
According to possible embodiments, the second guiding hole section cross section has non-circular shape, institute
State the first guiding hole section cross section have round-shaped.
According to possible embodiments, the further finishing operations are grinding actions.
According to possible embodiments, the grinding action is carried out using emery wheel.
A kind of second aspect according to the application, there is provided nozzle member that is made according to said method.
A kind of third aspect according to the application, there is provided fuel injector, including injector body, passes through
Securing member is connected to the injector body, as described above nozzle member, and inserts the spray
The elongated needle valve member of the interior in the hole of mouth.
According to the nozzle member of the application, for guiding the essence of the guiding hole section of the elongated needle valve member of fuel injector
Process operation is carried out in the case of pre-applied external force, and the guiding hole section of such nozzle member is become in advance
Shape, it is ensured that nozzle member is put on nozzle member in work external force after being fixed in injector body
When nozzle member have predetermined guiding hole section shape of cross section and guiding hole section radial dimension.
Description of the drawings
The aforementioned and further feature of the application will be obtained more by being discussed in detail of being given with reference to the accompanying drawings
It is expressly understood, in the accompanying drawings：
Fig. 1 a-1g shows the nozzle member of prior art, and wherein Fig. 1 a and 1b is in grinding action
During the longitudinal sectional view of nozzle member and top view, Fig. 1 c and 1d is the spray for completing grinding action
The longitudinal sectional view of mouth and top view, Fig. 1 e are the fuel injectors of the nozzle member for including prior art
Outside drawing, Fig. 1 f and 1g are longitudinal sectional view and the top views for assembling rear nozzle part；
Fig. 2 a-2f shows the nozzle member of the one embodiment according to the application, wherein Fig. 2 a and 2b
The longitudinal sectional view of the nozzle member being in during finishing operations and top view, Fig. 2 c and 2d is
Longitudinal sectional view and the top view of the nozzle member of finishing operations is completed, Fig. 2 e and 2f is root after assembling
Longitudinal sectional view and top view according to the nozzle member of the application.
Specific embodiment
For help those skilled in the art definitely understand this application claims theme, below tie
Close the specific embodiment that accompanying drawing describes the application in detail.Through all accompanying drawings of the application, structure or
The same or analogous part of function is designated by like reference numerals throughout.
Any kind of high pressure fuel injector is applied to according to the nozzle member of the application.High pressure fuel injector totality
On include the injector body and the nozzle member that are secured together by securing member.It is fixed to fuel injector sheet
After body, nozzle member subjects the pressure that other parts of fuel injector apply.
According to the principle of the application, cause nozzle member to prevent due to the appearance of above-mentioned operating pressure
Internal Hole Deformation so that occurring undesirable rubbing between elongated needle valve member and the endoporus of nozzle member
Wipe, the guiding hole section of the endoporus of nozzle member first by roughing, then under conditions of pre-applied pressure
Carry out finishing operations.The cross sectional dimensions of the guiding hole section after roughing is set so that basic
On nozzle member when being applied on nozzle member equal to the impressed pressure of operating pressure after deformation maximum diameter
To predetermined final radial dimension is smaller in size than, the predetermined final radial dimension is configured to be suitable to
The needle valve member being inserted in which carries out expected slip in which.So, the guiding hole section after roughing
Could guarantee to obtain the predetermined final radial dimension and surface roughness by follow-up finishing
Deng requirement.Preferably, the maximum radial dimension of the nozzle member after the deformation is obtained by experiment.Excellent
Selection of land, the finishing operations are grinding action.Grinding tool common for emery wheel.
By this way, processing guiding hole section under conditions of pre-applied pressure, pre- equivalent in applying
Inner surface under conditions of deformation to guiding hole section is finished.So, complete to guide hole section
After finishing operations and the removal pre-applied pressure, guiding hole section will be deformed into nature,
Under this nature, before guiding the shape and size of hole section to likely differ from removal pre-applied pressure
Shape and size.After nozzle member is mounted in injector body, nozzle member is subject to again
Operating pressure, the guiding hole section of nozzle member are deformed by the trend towards the predeformation.
Compared with being processed to guiding hole section with not pre-applied pressure, nozzle member is mounted to fuel injector sheet
After on body, the shape and size of the inner surface of guiding hole section are more controllable.If the pre-applied pressure
Less than if a certain specific tolerance limit, nozzle member is assembled or their difference equal with operating pressure
After in injector body, guiding hole section and the fitness being inserted between needle valve member also ensure that place
In tolerance limit.
Used as a preferred example, the guiding hole section of the endoporus of nozzle member is equal with operating pressure
Predetermined shape and size are finish-machined under pre-applied pressure condition, that is, be refined to and be suitable for pin
Valve member carries out expecting the shape and size of slip.
As an example, remove after the completion of the process operation of the guiding hole section of the endoporus of nozzle member and apply
The pre-applied pressure being added on nozzle member, the endoporus of nozzle member deform, the guiding hole section after deformation
Can have formation and the size for being different from the predetermined shape and size, for example, be deformed into irregular
Non-circular shape.
After nozzle member is assembled to injector body, the operating pressure quilt equal with pre-applied pressure
It is applied thereto, as during process operation, the nozzle under the operating pressure conditions again
The endoporus of part recovers to being suitable for needle valve member to carry out expecting the described predetermined shape and size of slip, this
Sample, reliably avoid the generation rubbed between the elongated needle valve member of fuel injector and the endoporus of nozzle member.
Or, if pre-applied pressure is not strictly equal with operating pressure, guarantee nozzle member in operating pressure
The shape and size of the guiding hole section of its endoporus lower are in allowed limits.
Below with reference to Fig. 2 a-2f describe in detail the nozzle member according to the fuel injector of the application structure and its
Manufacture method.
First, mechanical roughing nozzle member 50 makes which substantially with most termination as shown in Figure 2 a
Structure.The nozzle member 50 of final structure with first end face 12, positioned at 50 middle part of nozzle member and the
The middle cascaded surface 14 that end face 12 is oppositely directed to, and direction identical with middle cascaded surface 14,
Positioned at the inclined end face 16 at oil spout end, nozzle member 50 also defines endoporus 30.Endoporus 30 includes to draw
Guide hole section 32 and the second hole section 36 being connected with guiding hole section 32 by high-pressure chamber 34.Here
Stage, the cross sectional dimensions of the guiding hole section 32 after roughing are set so that in impressed pressure quilt
The maximum radial dimension of the nozzle member after deforming when putting on nozzle member is less than predetermined final radial ruler
Very little, the needle valve member that the predetermined final radial dimension is configured to be suitable to be inserted in which is entered in which
Row is expected to slide.So, the guiding hole section 32 after roughing could be true by follow-up finishing
Protect and obtain the requirement such as the predetermined final radial dimension and surface roughness.Preferably, the change
The maximum radial dimension of the nozzle member after shape is obtained by experiment.
The step of carrying out finishing guiding hole section 32 afterwards, Fig. 2 a and 2b is in finishing, has
Body is the longitudinal sectional view of the nozzle member 50 during grinding action and top view, it can be seen that
After assembling with nozzle member 50, suffered operating pressure is equivalent or special one with the difference between the operating pressure
External force F in tolerance limit is determined by pre-applied in first end face 12 and the middle cascaded surface of nozzle member 50
On 14, in this case, the guiding hole section 32 of finishing nozzle member 50 is to predetermined shape and chi
Very little.According to a kind of specific embodiment, as illustrated, when external force F is equal with operating pressure, using
The guiding hole section 32 of nozzle member 50 is ground by emery wheel 80 or other grinding tools known in the art
Become and the shape of cross section that the outer surface of the elongated needle valve member being inserted into is consistent and radial dimension, such as scheme
Shown in 2b.According to the processing mode that a kind of feasibility embodiment, other materials are removed, such as laser
Processing, can be used for finishing guiding hole section 32.
After the completion of finishing operations, external force F is removed.Fig. 2 c and 2d are to complete finishing operations respectively
And remove the longitudinal sectional view of nozzle member 50 and top view after external force F.Due to external force F
Remove, the guiding hole section 32 of nozzle member 50 deforms, and present shown in Fig. 2 d, different
Non-circular shape and cross sectional dimensions in the outer surface of elongated needle valve member.
When assembling is according to the nozzle member 50 of the application, by means of the securing member (securing member in Fig. 1 e
60) nozzle member 50 is fixed to the injector body (injector body in Fig. 1 e of fuel injector
70), the first end face 12 of nozzle member 50 is abutted to other part (not shown) of nozzle member, example
As middle disk component；The middle cascaded surface 14 of nozzle member 50 is abutted to the respective table of securing member 60
Face.Thus, operating pressure F is reapplied first end face 12 and middle ladder in nozzle member 50
On face 14, as shown in Figure 2 e.
In the case that external force F in process is equal to operating pressure, the endoporus 30 of nozzle member 50
Guiding hole section 32 be substantially deformed into again shape of cross section and cross sectional dimensions shown in Fig. 2 b,
Namely guiding hole section 32 is hoped the horizontal stroke being consistent with the outer surfaces of elongated needle valve member for presenting
Cross sectional shape and cross sectional dimensions.So, it is to avoid the outer surface of the elongated needle valve member being inserted into and spray
There is undesirable friction between the inner surface of the guiding hole section 32 of mouth 50.In process
In the case of external force F is unequal with operating pressure, the guiding hole section 32 of the endoporus 30 of nozzle member 50
Again the degree for deforming also is guaranteed in allowed limits.
As described above, by or difference with operating pressure between equal with operating pressure in tolerance limit
The guiding hole section of the endoporus of nozzle member is carried out finishing under conditions of interior, such as grinding action so that
Nozzle member guiding hole section of its endoporus after injector body is mounted to is obtained in that and is suitable for needle-valve
Part carries out expecting the predetermined shape of cross section of slip and cross sectional dimensions, or is able to ensure that in fair
Perhaps in the range of.This effectively avoids due to the applying of operating pressure and cause the horizontal stroke of nozzle member endoporus
Section deformation further causes needle valve member and nozzle member endoporus that the phenomenon of friction occurs.And in nozzle member
During the process operation of the guiding hole section in hole, the applying of external force can pass through known in the art
What proper method is realized.
Although describing the application based on specific embodiment, the application is not restricted to shown
Details.On the contrary, in the range of claim and its equivalent, the various details of the application
Can be modified.
Claims (10)
1. a kind of manufacture fuel injector nozzle member (50) method, including：
Roughing nozzle member makes it have final structure, and the nozzle member of final structure has by fastening
Towards injector body (70) when part (60) is fixed to injector body (70) of the fuel injector
First end face (12) and the middle cascaded surface (14) contacted with the securing member (60), described
The first end face (12) of nozzle member and middle cascaded surface (14) are oppositely directed to, and the nozzle member is limited
Go out the endoporus (30) of the elongated needle valve member for being suitable to house the fuel injector, endoporus (30) include
Guiding hole section (32) between the first end face (12) and middle cascaded surface (14)；
The upper applying of first end face (12) and centre cascaded surface (14) in the nozzle member is relative to each other
Impressed pressure (F) in the case of, finish in above-mentioned steps that machining obtains further draws
Guide hole section (32) so that described guiding hole section (32) have be suitable for being introduced into the oil spout in which
Device needle-valve carries out in which expecting the first predetermined guiding hole section shape of cross section of slip and the first guiding
Hole section radial dimension；With
After the completion of the finishing operations, remove impressed pressure (F).
2. method according to claim 1, wherein, impressed pressure (F) with nozzle
The operating pressure that part (50) is born in the case of being fixed to the injector body (70) is equal,
Or both differences are in an allowed band.
3. method according to claim 2, wherein, draws described in generation in roughing step
The cross sectional dimensions of guide hole section (32) is set so as to be applied in the impressed pressure (F)
The maximum radial dimension of the nozzle member (50) when nozzle member (50) is upper after deformation is less than described predetermined
First guiding hole section radial dimension.
4. method according to claim 3, wherein, the further finishing operations are completed simultaneously
And after removing impressed pressure (F), guiding hole section (32) presents the second guiding hole section
Shape of cross section and the second guiding hole section radial dimension.
5. method according to claim 4, wherein, the second guiding hole section shape of cross section
The first predetermined guiding hole section shape of cross section and the are different from the second guiding hole section radial dimension
One guiding hole section radial dimension.
6. method according to claim 5, wherein, the second guiding hole section cross section has
Non-circular shape, the first guiding hole section cross section have round-shaped.
7. the method according to any one of claim 1-6, wherein, described is finished further
Operation is grinding action.
8. method according to claim 7, wherein, the grinding action utilizes emery wheel (80)
Carry out.
9. a kind of the nozzle member of fuel injector (50), wherein, the nozzle member is according to claim 1-8
In arbitrary described method make.
10. a kind of fuel injector, including injector body (70), is connected to institute by securing member (60)
State injector body (70), nozzle member (50) according to claim 9, and insertion institute
State the elongated needle valve member of the interior in the hole of nozzle member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510532021.2A CN106475739B (en) | 2015-08-26 | 2015-08-26 | The nozzle member and its manufacturing method of fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510532021.2A CN106475739B (en) | 2015-08-26 | 2015-08-26 | The nozzle member and its manufacturing method of fuel injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106475739A true CN106475739A (en) | 2017-03-08 |
| CN106475739B CN106475739B (en) | 2019-04-23 |
Family
ID=58233867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510532021.2A Active CN106475739B (en) | 2015-08-26 | 2015-08-26 | The nozzle member and its manufacturing method of fuel injector |
Country Status (1)
| Country | Link |
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| CN (1) | CN106475739B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106826138A (en) * | 2017-04-18 | 2017-06-13 | 上海第机床厂有限公司 | Presurized water reactor CRDM blind hole rod stroke housing and processing method |
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| DE4237405A1 (en) * | 1991-12-17 | 1993-06-24 | Mitsubishi Electric Corp | |
| US5947481A (en) * | 1996-08-02 | 1999-09-07 | Flowserve Management Company | Wavy face ring |
| CN101767287A (en) * | 2010-02-04 | 2010-07-07 | 南京航空航天大学 | Part processing deformation control method based on blank predeformation |
| CN101985912A (en) * | 2010-11-11 | 2011-03-16 | 常州易通燃油喷射器制造有限公司 | Diesel injector coupler applied to multiple fuels |
| CN102233483A (en) * | 2010-04-30 | 2011-11-09 | 博世汽车柴油系统股份有限公司 | Equipment and method for processing nozzle body |
| CN102635198A (en) * | 2012-04-09 | 2012-08-15 | 浙江东南网架股份有限公司 | Combined elliptical section component and processing method thereof |
| CN103029037A (en) * | 2012-12-03 | 2013-04-10 | 大连理工大学 | Sealing ring machining pre-deformation force loading clamp and loading method |
| CN104084769A (en) * | 2014-06-30 | 2014-10-08 | 成都高普石油工程技术有限公司 | Nozzle machining technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6444259A (en) * | 1987-08-10 | 1989-02-16 | Tokai Trw & Co | Production of ball joint |
| DE4237405A1 (en) * | 1991-12-17 | 1993-06-24 | Mitsubishi Electric Corp | |
| US5947481A (en) * | 1996-08-02 | 1999-09-07 | Flowserve Management Company | Wavy face ring |
| CN101767287A (en) * | 2010-02-04 | 2010-07-07 | 南京航空航天大学 | Part processing deformation control method based on blank predeformation |
| CN102233483A (en) * | 2010-04-30 | 2011-11-09 | 博世汽车柴油系统股份有限公司 | Equipment and method for processing nozzle body |
| CN101985912A (en) * | 2010-11-11 | 2011-03-16 | 常州易通燃油喷射器制造有限公司 | Diesel injector coupler applied to multiple fuels |
| CN102635198A (en) * | 2012-04-09 | 2012-08-15 | 浙江东南网架股份有限公司 | Combined elliptical section component and processing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106826138A (en) * | 2017-04-18 | 2017-06-13 | 上海第机床厂有限公司 | Presurized water reactor CRDM blind hole rod stroke housing and processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106475739B (en) | 2019-04-23 |
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Address after: 214028 No.17 Xinhua Road, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province Patentee after: Bosch powertrain Co.,Ltd. Address before: 214028 No.17 Xinhua Road, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province Patentee before: Bosch Automotive Diesel Systems Co.,Ltd. |