CN108907089A - Large-scale workpiece divides shape module multiple groups core sand moulding method and positioning device - Google Patents
Large-scale workpiece divides shape module multiple groups core sand moulding method and positioning device Download PDFInfo
- Publication number
- CN108907089A CN108907089A CN201810804296.0A CN201810804296A CN108907089A CN 108907089 A CN108907089 A CN 108907089A CN 201810804296 A CN201810804296 A CN 201810804296A CN 108907089 A CN108907089 A CN 108907089A
- Authority
- CN
- China
- Prior art keywords
- scale bar
- screw rod
- locating device
- fulcrum
- shape module
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/064—Locating means for cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/108—Installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Testing Of Balance (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The present invention provides a kind of large-scale workpiece point shape module multiple groups core sand moulding method and positioning device, includes the following steps：Circumferential 3 D locating device is set at the center of disc-like casting group core, with the anchor point of circumferential 3 D locating device positioning different height；The anchor point auxiliary positioning sand core block for cooperating circumferential 3 D locating device to provide using point shape module of disc-like casting, forms casting type chamber；By above step, realize by dividing shape module to be accurately positioned sand core block.In 3 D locating device, bearing body is located at the center location of group core, and rotatable fulcrum is equipped in bearing body, and fulcrum is equipped with scale bar, and one end of scale bar is equipped with the sleeve that can be slided along scale bar, and liftable is equipped in sleeve and what be can be fixed fall needle.Using above scheme, cancel the production of the model of large-scale workpiece, and occupies limited production space, and ensure the dimensional accuracy of casting type chamber.The manufacture of the particularly suitable parts in small batch of the present invention, jigger wheel, FM Wheel such as diesel engine.
Description
Technical field
The present invention relates to casting field, especially a kind of large-scale workpiece divides shape module multiple groups core sand moulding method and positioning dress
It sets.
Background technique
Marine diesel jigger wheel, FM Wheel, category heavy duty disc class casting, blank outer diameter is in outer diameter
2500-4500mm ranges, as shown in the outer profile of Fig. 5, the casting of these types corresponds to every diesel engine, and structure is simple, size
Larger, reuse amount is less.The casting of these types is manufactured, usual step makes first to manufacture wooden contour model, recycles
The wooden contour model molding modeling, is then poured.Since these casting reuse amounts are less, model quantity kind is numerous
It is more, it takes up a large area, causes that long in time limit, at high cost, production efficiency is low.
Summary of the invention
Divide shape module multiple groups core sand moulding method technical problem to be solved by the invention is to provide a kind of large-scale workpiece and determines
Position device can save model manufacturing expense and shorten the production cycle, and can ensure closing precision.
In order to solve the above technical problems, the technical scheme adopted by the invention is that：A kind of large-scale workpiece divides shape module multiple groups
Core sand moulding method, includes the following steps：
S1, circumferential 3 D locating device is set at the center of disc-like casting group core, is positioned with circumferential 3 D locating device different
The anchor point of height；
S2, the anchor point auxiliary positioning sand core for cooperating circumferential 3 D locating device to provide using point shape module of disc-like casting
Block forms casting type chamber；
By above step, realize by dividing shape module to be accurately positioned sand core block.
In preferred scheme, point shape module is the 1/n circle partial structurtes that disc-like casting circumferentially divides shape.
In preferred scheme, in the 3 D locating device, bearing body is located at the center location of group core, in bearing body
Equipped with rotatable fulcrum, fulcrum is equipped with scale bar, and one end of scale bar is equipped with can be along the sleeve of scale bar sliding, sleeve
Equipped with liftable and what be can be fixed fall needle.
In preferred scheme, in the bearing body by bearing it is vertical be supported with fulcrum, the top of fulcrum and support
The screw flight connection of seat bottom, and the adjustable height of support base can be adjusted.
In preferred scheme, the support base is fixedly connected with scale bar；
It is additionally provided with horizontal tension device, in horizontal tension device, is fixedly connected in the middle part of wirerope one end and scale bar, wirerope
Behind the top of support base, the other end of wirerope is connect with adjusting screw rod, and adjusting screw rod passes through end and the tune of scale bar
Save nut connection；
Counterweight is equipped in the bottom of adjusting screw rod；
Scale bar is equipped with the sliding counterweight that can be slided along scale bar close to one end of adjusting screw rod；
Counterweight is additionally provided on bearing body.
A kind of circumferential 3 D locating device for above-mentioned formative method, bearing body are located at the center location of group core,
Rotatable fulcrum is equipped in bearing body, fulcrum is equipped with scale bar, and one end of scale bar is equipped with the set that can be slided along scale bar
Cylinder is equipped with liftable in sleeve and what be can be fixed falls needle.
In preferred scheme, in the bearing body by bearing it is vertical be supported with fulcrum, the top of fulcrum and support
The screw flight connection of seat bottom, and the adjustable height of support base can be adjusted.
In preferred scheme, the support base is fixedly connected with scale bar；
It is additionally provided with horizontal tension device, in horizontal tension device, is fixedly connected in the middle part of wirerope one end and scale bar, wirerope
Behind the top of support base, the other end of wirerope is connect with adjusting screw rod, and adjusting screw rod passes through end and the tune of scale bar
Save nut connection.
In preferred scheme, it is equipped with counterweight in the bottom of adjusting screw rod, scale bar is set close to one end of adjusting screw rod
There is the sliding counterweight that can be slided along scale bar；
Counterweight is additionally provided on bearing body.
In preferred scheme, sliding slot is equipped on scale bar, the pin shaft on sliding block passes through sliding slot, sets in the bottom of scale bar
There is datum level, is equipped with positioning surface, positioning surface and benchmark face contact at the top of sliding block.
A kind of large-scale workpiece provided by the invention divides shape module multiple groups core sand moulding method and positioning device, cancels large-scale workpiece
Model production, and occupy limited production space, and ensure the dimensional accuracy of casting type chamber.The circumferential three-dimensional localization of use
Device can be accurately positioned anchor point circumferentially, it is ensured that divides the position precision of shape module, and then ensures the position essence of sand core block
Degree quickly corrects the position deviation between sand core block, to control the cumulative errors of casting type chamber.The present invention is big for disc-like
Type casting is realized without monnolithic case model, it is only necessary to which 1/n circle module can position the combination of N number of sand core block, obtain accurate
Casting type chamber, to obtain high-precision grade spray, blank excircle dimension error is controllably in the 1 ‰ of diameter.The present invention
Manufacture of the scheme especially suitable for large scale single-piece or parts in small batch, jigger wheel, FM Wheel such as diesel engine.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples：
Fig. 1 is half section structure diagram of the invention.
Fig. 2 is partial enlargement diagram of the invention.
Fig. 3 is the structural schematic diagram of circumferential 3 D locating device in the present invention.
Fig. 4 is the overlooking structure diagram of circumferential 3 D locating device in the present invention.
Fig. 5 is the structural schematic diagram for dividing shape module in the present invention.
In figure：Circumferential 3 D locating device 1, scale bar 2, sliding slot 3, sliding block 4, sleeve 5 fall needle 6, support base 7, fulcrum 8,
Bearing body 9, counterweight 10, screw rod 11, bearing 12, sliding counterweight 13, horizontal tension device 14, adjusting nut 15, counterweight 16,
Sand core block 17 divides shape module 18.
Specific embodiment
Embodiment 1：
In Fig. 1 ~ 5, a kind of large-scale workpiece divides shape module multiple groups core sand moulding method, includes the following steps：
S1, circumferential 3 D locating device 1 is set at the center of disc-like casting group core, not with the positioning of circumferential 3 D locating device 1
Level anchor point；
In preferred scheme, in the 3 D locating device 1, bearing body 9 is located at the center location of group core, in bearing body 9
Equipped with rotatable fulcrum 8, fulcrum 8 is equipped with scale bar 2, and one end of scale bar 2 is equipped with the sleeve 5 that can be slided along scale bar 2,
Sleeve 5, it is interior to be equipped with liftable and what be can be fixed fall needle 6.It is slided by the rotation and sleeve 5 of scale bar 2 along scale bar 2,
And the lifting of needle 6 is fallen, the bottom tip for falling needle 6 can be circumferentially accurately positioned.So that it is determined that divide the position of shape module 18,
Pass through point shape module 18 and the position for falling the positioning point location sand core block 17 that needle 6 determines again.In Fig. 3, it is equipped in 5 side wall of sleeve
Screw, the outer wall for falling needle 6 are equipped with groove, after falling the lifting certain position of needle 6, are fixedly connected by screw.
In preferred scheme such as Fig. 3, in the bearing body 9 by bearing 12 it is vertical be supported with fulcrum 8, it is preferred that
Bearing is divided into two groups, and every group sets that there are two bearings, is additionally provided with top end cover at the top of bearing body 9 and fixes bearing, thus ties
Structure improves the rotating accuracy of fulcrum 8.The top of fulcrum 8 is threadedly coupled with the screw rod 11 of 7 bottom of support base, and can adjust branch
Support the adjustable height of seat 7.
In preferred scheme such as Fig. 3, the support base 7 is fixedly connected with scale bar 2；Support base 7 passes through three bolts
It is fixedly connected with scale bar 2.
It is additionally provided with horizontal tension device 14, in horizontal tension device 14, the middle part of wirerope one end and scale bar 2 is fixed to be connected
It connects, after wirerope is around the top of support base 7, is equipped with pin shaft on the top of support base 7, wirerope bypasses pin shaft, wirerope
The other end is connect with adjusting screw rod, and the end that adjusting screw rod passes through scale bar 2 is connect with adjusting nut 15；Thus structure passes through
Rotation adjusting nut 15 can adjust scale bar 2 to level.
It is equipped with counterweight 16 in the bottom of adjusting screw rod, the counterweight 16 of setting is used to make the mark at 7 both ends of support base
Foot bar 2 keeps balance, avoids imbalance caused by the sliding due to sliding block 4, and become by scale bar 2 caused by imbalance
Shape, the counterweight 16 in this example can adjust quantity according to the position of sliding block so as to adjust the size of counterweight 16.
Scale bar 2 is equipped with the sliding counterweight 13 that can be slided along scale bar 2 close to one end of adjusting screw rod, by sliding counterweight
13 can more accurately adjust balance；
Counterweight 10 is additionally provided on bearing body 9.Balance weight in this example is 20kg, in addition to counterweight, circumferential 3 D locating device 1
Self weight only have 4.8kg.
S2, it assists determining using the anchor point that point shape module 18 of disc-like casting cooperates circumferential 3 D locating device 1 to provide
Position sand core block 17, forms casting type chamber；
In preferred scheme such as Fig. 5, point shape module 18 is the 1/n circle partial structurtes that disc-like casting circumferentially divides shape.
The volume of component module can be greatly decreased using the program.
By above step, realize by dividing shape module to be accurately positioned sand core block.
Embodiment 2：
In Fig. 3,4, a kind of circumferential 3 D locating device for above-mentioned formative method, bearing body 9 is located at the center of circle of group core
Position is equipped with rotatable fulcrum 8 in bearing body 9, and fulcrum 8 is equipped with scale bar 2, and one end of scale bar 2 is equipped with can be along mark
The sleeve 5 that foot bar 2 is slided is equipped with liftable in sleeve 5 and what be can be fixed falls needle 6.
In preferred scheme, in the bearing body 9 by bearing 12 it is vertical be supported with fulcrum 8, the top of fulcrum 8 with
The screw rod 11 of 7 bottom of support base is threadedly coupled, and can adjust the adjustable height of support base 7.
In preferred scheme, the support base 7 is fixedly connected with scale bar 2；
It is additionally provided with horizontal tension device 14, in horizontal tension device 14, wirerope one end is fixedly connected with the middle part of scale bar 2,
After wirerope is around the top of support base 7, the other end of wirerope is connect with adjusting screw rod, and adjusting screw rod passes through scale bar 2
End is connect with adjusting nut 15.
In preferred scheme, it is equipped with counterweight 16 in the bottom of adjusting screw rod, scale bar 2 is close to one end of adjusting screw rod
Equipped with the sliding counterweight 13 that can be slided along scale bar 2；
Counterweight 10 is additionally provided on bearing body 9.
Preferred scheme such as Fig. 3, in 4, sliding slot 3 is equipped on scale bar 2, the pin shaft on sliding block 4 passes through sliding slot 3, is marking
The bottom of foot bar 2 is equipped with datum level, is equipped with positioning surface, positioning surface and benchmark face contact at the top of sliding block 4.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as limitation of the invention, this Shen
Please in embodiment and embodiment in feature in the absence of conflict, can mutual any combination.Protection model of the invention
The technical solution that should be recorded with claim is enclosed, the equivalent replacement side of technical characteristic in the technical solution recorded including claim
Case is protection scope.Equivalent replacement i.e. within this range is improved, also within protection scope of the present invention.
Claims (10)
1. a kind of large-scale workpiece divides shape module multiple groups core sand moulding method, it is characterized in that including the following steps：
S1, circumferential 3 D locating device is set at the center of disc-like casting group core（1）, with circumferential 3 D locating device（1）It is fixed
The anchor point of position different height；
S2, divide shape module using disc-like casting（18）Cooperate circumferential 3 D locating device（1）The anchor point auxiliary provided is fixed
Position sand core block（17）, form casting type chamber；
By above step, realize by dividing shape module to be accurately positioned sand core block.
2. a kind of large-scale workpiece according to claim 1 divides shape module multiple groups core sand moulding method, it is characterized in that：Point
Shape module（18）Circumferentially divide the 1/n circle partial structurtes of shape for disc-like casting.
3. large-scale workpiece according to claim 1 divides shape module multiple groups core sand moulding method, it is characterized in that：The three-dimensional is fixed
Position device（1）In, bearing body（9）Positioned at the center location of group core, in bearing body（9）It is interior to be equipped with rotatable fulcrum（8）, fulcrum
（8）It is equipped with scale bar（2）, scale bar（2）One end be equipped with can be along scale bar（2）The sleeve of sliding（5）, sleeve（5）Inside set
There is liftable and what be can be fixed falls needle（6）.
4. large-scale workpiece according to claim 3 divides shape module multiple groups core sand moulding method, it is characterized in that：The bearing body
（9）Inside pass through bearing（12）Vertical is supported with fulcrum（8）, fulcrum（8）Top and support base（7）The screw rod of bottom（11）Spiral shell
Line connection, and support base can be adjusted by the thread（7）Adjustable height.
5. large-scale workpiece according to claim 3 or 4 divides shape module multiple groups core sand moulding method, it is characterized in that：The branch
Support seat（7）With scale bar（2）It is fixedly connected；
It is additionally provided with horizontal tension device（14）, horizontal tension device（14）In, wirerope one end and scale bar（2）Middle part fix
Connection, wirerope bypass support base（7）Top after, the other end of wirerope is connect with adjusting screw rod, adjusting screw rod pass through mark
Foot bar（2）End and adjusting nut（15）Connection；
Counterweight is equipped in the bottom of adjusting screw rod（16）；
Scale bar（2）Being equipped with close to one end of adjusting screw rod can be along scale bar（2）The sliding counterweight of sliding（13）；
In bearing body（9）On be additionally provided with counterweight（10）.
6. one kind is used for the circumferential 3 D locating device of the described in any item formative methods of claim 1 ~ 2, it is characterized in that：Support
Body（9）Positioned at the center location of group core, in bearing body（9）It is interior to be equipped with rotatable fulcrum（8）, fulcrum（8）It is equipped with scale bar
（2）, scale bar（2）One end be equipped with can be along scale bar（2）The sleeve of sliding（5）, sleeve（5）It is interior to be equipped with liftable and be consolidated
Fixed falls needle（6）.
7. circumferential direction 3 D locating device according to claim 6, it is characterized in that：The bearing body（9）Inside pass through bearing
（12）Vertical is supported with fulcrum（8）, fulcrum（8）Top and support base（7）The screw rod of bottom（11）It is threadedly coupled, and can
Adjust support base（7）Adjustable height.
8. circumferential direction 3 D locating device according to claim 6 or 7, it is characterized in that：The support base（7）With scale bar
（2）It is fixedly connected；
It is additionally provided with horizontal tension device（14）, horizontal tension device（14）In, wirerope one end and scale bar（2）Middle part fix
Connection, wirerope bypass support base（7）Top after, the other end of wirerope is connect with adjusting screw rod, adjusting screw rod pass through mark
Foot bar（2）End and adjusting nut（15）Connection.
9. circumferential direction 3 D locating device according to claim 8, it is characterized in that：Balance is equipped in the bottom of adjusting screw rod to match
Weight（16）, scale bar（2）Being equipped with close to one end of adjusting screw rod can be along scale bar（2）The sliding counterweight of sliding（13）；
In bearing body（9）On be additionally provided with counterweight（10）.
10. circumferential direction 3 D locating device according to claim 6 or 7, it is characterized in that：In scale bar（2）It is equipped with sliding slot
（3）, sliding block（4）On pin shaft pass through sliding slot（3）, in scale bar（2）Bottom be equipped with datum level, in sliding block（4）Top set
There are positioning surface, positioning surface and benchmark face contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810804296.0A CN108907089B (en) | 2018-07-20 | 2018-07-20 | Multi-core assembly molding method and positioning device for large-sized workpiece fractal module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810804296.0A CN108907089B (en) | 2018-07-20 | 2018-07-20 | Multi-core assembly molding method and positioning device for large-sized workpiece fractal module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108907089A true CN108907089A (en) | 2018-11-30 |
| CN108907089B CN108907089B (en) | 2023-09-26 |
Family
ID=64415471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810804296.0A Active CN108907089B (en) | 2018-07-20 | 2018-07-20 | Multi-core assembly molding method and positioning device for large-sized workpiece fractal module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108907089B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113996752A (en) * | 2021-10-29 | 2022-02-01 | 北京航空航天大学 | Wax mold vertical position positioning device and positioning method for precision casting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920312A (en) * | 2010-08-21 | 2010-12-22 | 宜昌船舶柴油机有限公司 | Casting method and leveling tool for large multi-blade casting |
| CN201950167U (en) * | 2011-01-28 | 2011-08-31 | 宜昌船舶柴油机有限公司 | Regulating tool |
| CN105108066A (en) * | 2015-08-28 | 2015-12-02 | 共享铸钢有限公司 | Core setting size control device and method for annular casting |
| CN105170917A (en) * | 2015-09-30 | 2015-12-23 | 共享铸钢有限公司 | Quick molding tool and method for large-sized disc castings |
| CN107812892A (en) * | 2017-10-09 | 2018-03-20 | 铜陵安东铸钢有限责任公司 | The control method of core size control device under a kind of casting using ring-type |
-
2018
- 2018-07-20 CN CN201810804296.0A patent/CN108907089B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920312A (en) * | 2010-08-21 | 2010-12-22 | 宜昌船舶柴油机有限公司 | Casting method and leveling tool for large multi-blade casting |
| CN201950167U (en) * | 2011-01-28 | 2011-08-31 | 宜昌船舶柴油机有限公司 | Regulating tool |
| CN105108066A (en) * | 2015-08-28 | 2015-12-02 | 共享铸钢有限公司 | Core setting size control device and method for annular casting |
| CN105170917A (en) * | 2015-09-30 | 2015-12-23 | 共享铸钢有限公司 | Quick molding tool and method for large-sized disc castings |
| CN107812892A (en) * | 2017-10-09 | 2018-03-20 | 铜陵安东铸钢有限责任公司 | The control method of core size control device under a kind of casting using ring-type |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113996752A (en) * | 2021-10-29 | 2022-02-01 | 北京航空航天大学 | Wax mold vertical position positioning device and positioning method for precision casting |
| CN113996752B (en) * | 2021-10-29 | 2022-06-28 | 北京航空航天大学 | Wax mold vertical position positioning device and positioning method for precision casting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108907089B (en) | 2023-09-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105945220B (en) | A kind of band ceramic core shaping investment pattern method | |
| CN109318502A (en) | A kind of cast mineral monoblock type digital controlled lathe bed production technology | |
| CN104815965B (en) | A kind of annulus sand core rod bridge-type connects anti-deformation method and structure | |
| CN108907089A (en) | Large-scale workpiece divides shape module multiple groups core sand moulding method and positioning device | |
| CN103008557B (en) | A kind of casting core assembly of compressor case and formative method | |
| CN208366191U (en) | Circumferential 3 D locating device | |
| CN102248525A (en) | Three-dimensional line marking device and method capable of marking spatial oblique lines on curved surface | |
| CN202114725U (en) | Three-coordinate drawing device for drawing spatial oblique lines on curved surface | |
| CN105383009B (en) | A kind of mould for improving cooling wind blade unbalance dynamic qualification rate | |
| CN107643067A (en) | A kind of bearing inner race inner circle roundness measuring system | |
| CN204171278U (en) | Submersible electric pump guide wheel foundry sand mould | |
| CN207133576U (en) | The camera lens module and panorama camera of panorama camera | |
| CN214950960U (en) | Integral type combination ring gauge | |
| CN103398704B (en) | Method for measuring foundation frame at continuous-casting sector-shaped section | |
| CN201239971Y (en) | Lost foam riser cutter | |
| CN106181796A (en) | A kind of circular groove powder body precision stand material device | |
| CN205020786U (en) | Cyclic annular foundry goods core setting size control device | |
| CN208920999U (en) | Body mistake face dimension measuring device | |
| CN209727023U (en) | A kind of milling big end two sides symmetry degree gauge | |
| CN209570110U (en) | A kind of device measuring pipe length | |
| CN207522427U (en) | A kind of positioning supporting tool of engine support | |
| CN2381999Y (en) | Instrument for measuring central diameter of retainer of roller bearing | |
| CN206263563U (en) | A kind of solenoid travel adjusting means | |
| CN206758263U (en) | The detent mechanism of tool de- material push rod | |
| CN205780231U (en) | A kind of straddle-type single-track vehicle output shaft global formation steel-casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |