CN104439849B - Main platform otic placode fixtures for rapid assembly and otic placode assembly method - Google Patents
Main platform otic placode fixtures for rapid assembly and otic placode assembly method Download PDFInfo
- Publication number
- CN104439849B CN104439849B CN201410744802.3A CN201410744802A CN104439849B CN 104439849 B CN104439849 B CN 104439849B CN 201410744802 A CN201410744802 A CN 201410744802A CN 104439849 B CN104439849 B CN 104439849B
- Authority
- CN
- China
- Prior art keywords
- otic placode
- positioning
- welding
- otic
- main platform
- 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.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
Abstract
The invention discloses a kind of main platform otic placode fixtures for rapid assembly and otic placode assembly method, relate to main platform and mounting technology field thereof. The present invention includes tooling shaft, positioning shaft sleeve and 2 positioning spacers, described positioning shaft sleeve and 2 positioning spacer gaps are sleeved on tooling shaft, and one end of tooling shaft is provided with locating shoulder, and the other end is provided with positioning end cover; Two pairs of otic placodes are located respectively to the two ends that are through at tooling shaft, between every a pair of otic placode, positioning spacer is housed, an otic placode that is positioned at outside relies on locating shoulder location, two otic placodes that are positioned at inner side rely on positioning shaft sleeve and positioning spacer location, and another otic placode in outside is by positioning spacer and positioning end cover location. By frock, the otic placode of needs assemblings is positioned to clamping, not only can greatly reduce cost of manufacture, shorten the production cycle, and the fitted position precision of otic placode improves greatly, meet the quality requirement of product.
Description
Technical field
The present invention relates to main platform and mounting technology field thereof, particularly a kind of assembling that is suitable for tracked construction equipment turntable otic placode.
Background technology
In engineering machinery, as serial heavy-duty machineries such as crawler type rotary drilling rig, crawler crane and the dynamic compaction machineries of the series such as TD18, TD28, TD30, TQ50, TQ80, TD138, mostly formed by power set, operating mechanism and swing arm, turntable, chassis etc. Turntable i.e. main platform, can be contained on chassis by pivoting support, total weight on turntable can be passed to chassis, actuating unit, transmission mechanism, major-minor hoisting mechanism, operating mechanism, swing arm etc. are housed on turntable, power set can make turntable do 360 degree revolutions by slew gear, realize the operations such as lifting, in the time that these mechanisms are installed on turntable, need on turntable, to assemble in advance otic placode, pass through otic placode, these mechanisms and turntable are coupled together, and the positional precision of otic placode is directly connected to the assembly precision of these mechanisms on turntable.
At present, be mainly that several special purpose machine tools coordinate to the assembling and positioning of the otic placode on turntable, carry out integrated machine processing, ensure the positional precision between otic placode, this processing will drop into a large amount of special equipments, wastes time and energy and takies substantial contribution, is unfavorable for the development of enterprise.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of main platform otic placode fixtures for rapid assembly and otic placode assembly method, can position the otic placode of needs assembling by frock, not only can greatly reduce cost of manufacture, and the fitted position precision of otic placode improves greatly, meet the quality requirement of product, improve the efficiency of assembling of otic placode.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of main platform otic placode fixtures for rapid assembly, comprise tooling shaft, positioning shaft sleeve and 2 positioning spacers, described positioning shaft sleeve and 2 positioning spacer gaps are sleeved on tooling shaft, one end of tooling shaft is provided with locating shoulder, and the other end is provided with positioning end cover; Two pairs of otic placodes are located respectively to the two ends that are through at tooling shaft, between every a pair of otic placode, positioning spacer is housed, an otic placode that is positioned at outside relies on locating shoulder location, two otic placodes that are positioned at inner side rely on positioning shaft sleeve and positioning spacer location, and another otic placode in outside is by positioning spacer and positioning end cover location.
Described positioning end cover comprises end cap and lock-screw.
The stage casing of described tooling shaft is provided with axial notch.
An otic placode assembly method of utilizing main platform otic placode fixtures for rapid assembly, comprises the steps:
The first step, analyzes by the drawing to the main platform that need to be equipped with otic placode, technical requirement, and to deformation allowance, angular deformation amount and amount of contraction are analyzed, and makes tooling shaft, positioning shaft sleeve, locating shoulder and the positioning spacer of corresponding otic placode size;
Second step, on main platform, draws the location dimension of otic placode with scriber according to drawing requirement, detect size between two otic placodes that draw with slide calliper rule;
The 3rd step, 2 pairs of otic placodes are assembled into together by frock, check whether assembling is fastening, whether detect the size of assembling between otic placode with slide calliper rule reaches or is less than dimensional tolerance, the otic placode fitting together by frock is placed on main platform and has rule and determined bit position, check whether the otic placode of assembling conforms to the dimension line of the otic placode of delimiting;
The 4th step, welding method adopts argon-rich gas shielded weldering, and adopting welding manner is the symmetrical weldings of two people, before weldering, by consistent two welding machine welding conditions adjustment, reduces heat input as far as possible, adopts little specification welding, ensures consistent speed of welding;
The 5th step, group to point weldering, according to drawing technical requirement, considers that inner side leg is less than outside leg, spot welding position is two sections of otic placode inner sides, increases medial angle deflection trend, the symmetrical spot welding of two people; When welding, first weld weld joint on inner side, completely cooling after, then the outer side weld of welding, adopts single track or multi-layer multi-pass welding according to thickness of slab, reduces heat input, controls distortion and contraction;
The 6th step, weld cooling after hammering weld seam gently, unclamp the lock-screw of one end, take off positioning end cover, rotary fixture axle after rotating flexibly, is extracted tooling shaft out from the otic placode fixing.
The beneficial effect that adopts technique scheme to produce is:
By otic placode equipped needs is arranged in frock according to actual size, then be placed into the location of ruling, installation site with the frock of otic placode, and after being welded, takes off again otic placode frock, such assembling mode not only can ensure the dimensional accuracy between otic placode, and can reduce post welding distortion, the equipped size Control of otic placode is controlled in 0.10mm in 1mm, axiality, has met the assembly production requirement of product.
Utilize this frock, can on turntable, mast etc. are grown up steel construction piece, directly weld otic placode, save external coordination and entrusted machining processes, save the freight charges of machined expense and dealing, the bottleneck that has solved enterprise's large-sized structural parts machining apparatus scarce capacity, has shortened the process-cycle.
This frock is applicable to the main platform of crawler crane of TQ80 in engineering machinery, TQ50 model, the otic placode of strong rammer owner's platform is equipped with, and the middle mast of TD18, TD138TD28TD30 rotary drilling rig and upper mast, elevator equipped etc. more than ten to plant the otic placodes of the steel construction of growing up equipped, can substitute integrated machine processing, can greatly reduce cost of manufacture, shorten the production cycle.
Brief description of the drawings
Fig. 1 is the structural representation of duty of the present invention;
Fig. 2 is the structural representation of tracked construction equipment turntable otic placode;
In figure: 1, locating shoulder; 2, positioning spacer; 3, otic placode; 4, positioning shaft sleeve; 5, tooling shaft; 6, positioning end cover; 7, lock-screw.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
At present, along with scientific and technical development, new technology, new technology are done aspect assembly technology development rapidly cold, utilize assembling skill and Fundamentals of Welding, be equipped with the exercisable assembly precision that steps up positioning tool and ensured steelwork component, can substitute integrated machine processing, effectively reduce cost of manufacture, reduce the production cycle, improved the assembly precision of the series engineering such as crawler crane, rotary drilling rig machinery, and greatly reduced the cost of assembly production. The present invention bores the analysis of the direction of structure, assembly precision, equipped relation and requirement, assembling sequence, welding deformation of parts and internal stress trend, clamping and positioning frock by crawler crane parts and revolving are dug, manufacture otic placode assembly tool, the assembling of the equipped and TD30 mast oil cylinder bearing by the otic placode to the main platform of TQ80TQ50 crawler crane, strong rammer owner's platform, prove to use this frock can control welding deformation, ensure overall dimensions, its coaxial accuracy reaches the requirement of 0.10mm.
Its structure, referring to Fig. 1, specifically comprises tooling shaft 5,4 and 2 positioning spacers 2 of positioning shaft sleeve, and 4 and 2 positioning spacer 2 gaps of described positioning shaft sleeve are sleeved on tooling shaft 5, and one end of tooling shaft 5 is provided with locating shoulder 1, and the other end is provided with positioning end cover 6; Two pairs of otic placodes 3 are located respectively to the two ends that are through at tooling shaft 5, between every a pair of otic placode 3, positioning spacer 2 is housed, an otic placode 3 that is positioned at outside relies on locating shoulder 1 to locate, two otic placodes 3 that are positioned at inner side rely on positioning shaft sleeve 4 and positioning spacer 2 to locate, and another otic placode 3 in outside is located by positioning spacer 2 and positioning end cover 6.
Described positioning end cover 6 comprises end cap and lock-screw 7.
Take off for ease of positioning shaft sleeve 4, the stage casing of described tooling shaft 5 is also provided with axial notch.
The size of tooling shaft 5, positioning shaft sleeve 4, positioning spacer 2, locating shoulder 1 is determined according to the actual installation position of otic placode 3, but its required precision is higher than the positional precision of actual installation.
This frock can reach machining dimension requirement, ensures that the dimensional tolerance of frock is less than actual size tolerance, wherein, utilizes tooling shaft 5 to ensure axiality, and tooling shaft 5 size diameter of making are greater than the equipped axle of actual use, make up post welding distortion amount. Utilize positioning shaft sleeve 4 to ensure the location dimension between otic placode 3, utilize the principle rigidly fixing simultaneously, Reducing distortion, utilizes frock to become as a whole increase rigidity, adopts the symmetrical assembly welding of two people and rational welding sequence, offsets to be welded to each other and shrinks and angular deformation
An otic placode assembly method of utilizing main platform otic placode fixtures for rapid assembly, comprises the steps:
The first step, analyzes by the drawing to the main platform that need to be equipped with otic placode 3, technical requirement, and to deformation allowance, angular deformation amount and amount of contraction are analyzed, and makes tooling shaft 5, positioning shaft sleeve 4, locating shoulder 1 and the positioning spacer 2 of corresponding otic placode size;
Second step, on main platform, draws the location dimension of otic placode 3 with scriber according to drawing requirement, detect size between two otic placodes 3 that draw with slide calliper rule;
The 3rd step, 2 pairs of otic placodes 3 are assembled into together by frock, check whether assembling is fastening, whether detect the size of assembling between otic placode with slide calliper rule reaches or is less than dimensional tolerance, the otic placode fitting together by frock 3 is placed on main platform and has rule and determined bit position, check whether the otic placode of assembling conforms to the dimension line of the otic placode of delimiting;
The 4th step, welding method adopts argon-rich gas shielded weldering, and adopting welding manner is the symmetrical weldings of two people, before weldering, by consistent two welding machine welding conditions adjustment, reduces heat input as far as possible, adopts little specification welding, ensures consistent speed of welding;
The 5th step, group to point weldering, according to drawing technical requirement, considers that inner side leg is less than outside leg, spot welding position is two sections of otic placode 3 inner sides, increases medial angle deflection trend, the symmetrical spot welding of two people; When welding, first weld weld joint on inner side, completely cooling after, then the outer side weld of welding, adopts single track or multi-layer multi-pass welding according to thickness of slab, reduces heat input, controls distortion and contraction;
The 6th step, weld cooling after hammering weld seam gently, unclamp the lock-screw 7 of one end, take off positioning end cover 6, rotary fixture axle 5 after rotating flexibly, is extracted tooling shaft out from the otic placode fixing.
Shown in Figure 2, otic placode on the main platforms of similar products such as crawler crane steel construction piece, dynamic compaction machinery steel construction piece, rotary drilling rig steel construction piece is more, because the dimensional accuracy of otic placode is directly connected to the accuracy of the mechanisms such as the arm that is assembled together with otic placode, truss, hoist engine, and the equipped difficult point of otic placode is: 1. group is high to dimensional accuracy, be difficult to ensure; 2. post welding distortion amount and amount of contraction are larger on the impact of otic placode endoporus axiality, can not ensure the requirement of drawing axiality, and angular deformation and welding are shunk and can not be ensured relative size between otic placode, need secondary adjusting; 3. the outer machined cost of committee is high, and the process-cycle is long, and for individual other large-scale structure palpus special equipment, disposable input is too large, and large-scale structure freight charges are higher.
The innovative point of innovation and creation: 1. adopt the meticulous line of scriber to be equipped with the meticulous detection of slide calliper rule; 2. make frock, ensure that the dimensional tolerance of frock is less than actual size tolerance, utilize axle to ensure axiality, the technique shaft size diameter of making is greater than the assembled shaft of actual use, makes up post welding distortion amount. Utilize the positioning shaft sleeve 4 that steel pipe is made to ensure the location dimension between otic placode, utilize the principle rigidly fixing simultaneously, Reducing distortion, utilizes frock that otic placode is formed to body, increases rigidity; 3. adopt the symmetrical assembly welding of two people and rational welding sequence, offset to be welded to each other and shrink and angular deformation; 4. overall structure dimensional accuracy improves greatly, and equipped otic placode and bearing pin size Control, in 0.10mm, have substituted machined, have met the assembly production requirement of product.
This frock can be widely used in the equipped making of similar products such as crawler crane steel construction piece, dynamic compaction machinery steel construction piece, rotary drilling rig steel construction piece, remarkable benefit. Through meticulous setting-out, meticulous detection, frock making, meticulous assembling, welding are controlled, and overall structure dimensional accuracy improves greatly, and equipped ear seat size Control in 0.10mm, has met the assembly production requirement of product in 1mm, axiality. At the direct welding ear seat on steel construction piece of growing up, save the outer machining processes of large-scale structure part committee, greatly save machined expense, analyze according to statistics, the first machined expense of each saving 3000-6000, and saved the freight charges of dealing, wherein, each saving 1500-3000 unit; And solved the bottleneck of large-sized structural parts machining apparatus scarce capacity, shorten the process-cycle.
The present invention is applicable to that the otic placode of the main platform of engineering machinery TQ80TQ50 crawler crane, strong rammer owner's platform is equipped, welding, and TD18, TD138TD28TD30 revolve to dig and bore more than ten welding of planting the steel construction of growing up such as middle mast and upper mast, elevator be equipped and be equipped with operation.
Claims (2)
1. a main platform otic placode fixtures for rapid assembly, it is characterized in that, comprise tooling shaft (5), positioning shaft sleeve (4) and 2 positioning spacers (2), described positioning shaft sleeve (4) and 2 positioning spacers (2) gap are sleeved on tooling shaft (5), one end of tooling shaft (5) is provided with locating shoulder (1), and the other end is provided with positioning end cover (6); Two pairs of otic placodes (3) are located respectively to the two ends that are through at tooling shaft (5), positioning spacer (2) is housed between every a pair of otic placode (3), an otic placode (3) that is positioned at outside relies on locating shoulder (1) location, two otic placodes (3) that are positioned at inner side rely on positioning shaft sleeve (4) and positioning spacer (2) location, and another otic placode (3) in outside is by positioning spacer (2) and positioning end cover (6) location; Described positioning end cover (6) comprises end cap and lock-screw (7); The stage casing of described tooling shaft (5) is provided with axial notch.
2. an otic placode assembly method of utilizing main platform otic placode fixtures for rapid assembly, is characterized in that, comprises the steps:
The first step, by drawing, the technical requirement of the main platform that need to be equipped with otic placode (3) are analyzed, to deformation allowance, angular deformation amount and amount of contraction are analyzed, and make tooling shaft (5), positioning shaft sleeve (4), locating shoulder (1) and the positioning spacer (2) of corresponding otic placode size;
Second step, on main platform, draws the location dimension of otic placode (3) with scriber according to drawing requirement, detect size between two otic placodes (3) that draw with slide calliper rule;
The 3rd step, 2 pairs of otic placodes (3) are assembled into together by frock, check whether assembling is fastening, whether detect the size of assembling between otic placode with slide calliper rule reaches or is less than dimensional tolerance, the otic placode fitting together by frock (3) is placed on main platform and has rule and determined bit position, check whether the otic placode of assembling conforms to the dimension line of the otic placode of delimiting;
The 4th step, welding method adopts argon-rich gas shielded weldering, and adopting welding manner is the symmetrical weldings of two people, before weldering, by consistent two welding machine welding conditions adjustment, reduces heat input as far as possible, adopts little specification welding, ensures consistent speed of welding;
The 5th step, group to point weldering, according to drawing technical requirement, considers that inner side leg is less than outside leg, spot welding position is two sections of otic placode (3) inner sides, increases medial angle deflection trend, the symmetrical spot welding of two people; When welding, first weld weld joint on inner side, completely cooling after, then the outer side weld of welding, adopts single track or multi-layer multi-pass welding according to thickness of slab, reduces heat input, controls distortion and contraction;
The 6th step, weld cooling after hammering weld seam gently, unclamp the lock-screw (7) of one end, take off positioning end cover (6), rotary fixture axle (5) after rotating flexibly, is extracted tooling shaft out from the otic placode fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744802.3A CN104439849B (en) | 2014-12-09 | 2014-12-09 | Main platform otic placode fixtures for rapid assembly and otic placode assembly method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744802.3A CN104439849B (en) | 2014-12-09 | 2014-12-09 | Main platform otic placode fixtures for rapid assembly and otic placode assembly method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104439849A CN104439849A (en) | 2015-03-25 |
| CN104439849B true CN104439849B (en) | 2016-05-18 |
Family
ID=52887015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410744802.3A Active CN104439849B (en) | 2014-12-09 | 2014-12-09 | Main platform otic placode fixtures for rapid assembly and otic placode assembly method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104439849B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106181141B (en) * | 2016-07-12 | 2017-10-31 | 宝鸡石油机械有限责任公司 | A kind of same lift-type rig raising connection ear mount matches somebody with somebody soldering method |
| CN106064284A (en) * | 2016-08-18 | 2016-11-02 | 江阴市润冶重工机械有限公司 | Crawler crane main platform-specific frock |
| CN108971678A (en) * | 2018-08-03 | 2018-12-11 | 上海新光汽车电器有限公司 | Collector ring detecting tool and its processing method |
| CN110270735A (en) * | 2019-06-21 | 2019-09-24 | 宝鸡石油机械有限责任公司 | A kind of marine riser tightening hoop bearing ring assembly welding method |
| CN110560990A (en) * | 2019-07-30 | 2019-12-13 | 徐工集团工程机械股份有限公司建设机械分公司 | Slideway plate positioning device |
| CN111098078B (en) * | 2019-12-23 | 2022-05-24 | 北京新立机械有限责任公司 | Welding positioning method for tail connecting lock of large electric drive vehicle |
| CN113305547A (en) * | 2021-06-28 | 2021-08-27 | 贵州詹阳动力重工有限公司 | Assembly fixture of torsion shaft sleeve |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201217135Y (en) * | 2008-07-22 | 2009-04-08 | 山东丰汇设备技术有限公司 | Whole interchanging quick fix tower section engaging eared plate welding fixture |
| CN201324913Y (en) * | 2008-12-02 | 2009-10-14 | 天津渤天化工有限责任公司 | Connection device for butt welding |
| CN201685061U (en) * | 2010-05-25 | 2010-12-29 | 中外合资沃得重工（中国）有限公司 | Excavator bucket stick tailored-welding tooling |
| CN102990238B (en) * | 2012-11-22 | 2015-04-08 | 宝鸡石油机械有限责任公司 | Manufacture method of large span group-hole member |
| CN202934305U (en) * | 2012-11-30 | 2013-05-15 | 陕西通力专用汽车有限责任公司 | Welded clamping tool for circular tube lifting beam of automobile |
| CN103071958B (en) * | 2013-01-23 | 2015-05-20 | 中联重科股份有限公司 | Welding fixture for upper chord and bi-lug plate of cargo boom and single-section molding method for cargo boom |
| CN104128726B (en) * | 2013-07-30 | 2016-01-20 | 河南卫华重型机械股份有限公司 | Free bearing otic placode regulates fixture |
| CN204321476U (en) * | 2014-12-09 | 2015-05-13 | 南车石家庄车辆有限公司 | Main platform otic placode fixtures for rapid assembly |
-
2014
- 2014-12-09 CN CN201410744802.3A patent/CN104439849B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104439849A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104439849B (en) | Main platform otic placode fixtures for rapid assembly and otic placode assembly method | |
| CN102350515B (en) | Rotary type numerical control upright drilling machine | |
| CN202639385U (en) | Multi-drill head drill rig | |
| CN104354776A (en) | Welding type guide wheel body and production method thereof | |
| CN113305460A (en) | Automatic welding device and process method suitable for finned radiator oil collecting pipe | |
| CN211258658U (en) | A support frame for section of jurisdiction is assembled | |
| CN204321476U (en) | Main platform otic placode fixtures for rapid assembly | |
| CN103088910B (en) | Centripetal joint two-way socket bearing pitch point and manufacturing method thereof | |
| CN106141513B (en) | Multi-work piece group welds positioner and assembly welding method | |
| CN105081666A (en) | Pairing welding method for large-diameter steel pipes and pairing welding apparatus for same | |
| CN209886998U (en) | Special group of circular tank body is to welding frock | |
| CN204075314U (en) | A kind of end board assembly boring grab | |
| CN103737152A (en) | Method for manufacturing anticorrosion hydraulic support upright by welding hole shrinkage | |
| CN203282010U (en) | Arc-shaped plate piece groove machining tool | |
| CN103084774B (en) | Vane positioning and welding machine | |
| CN202114433U (en) | Welding device of lorry-mounted crane connecting plate component | |
| CN102848140B (en) | Machining method for engine chassis of small excavator | |
| CN212822839U (en) | High-strength bolt hole group manufacturing auxiliary device | |
| CN203526959U (en) | Automatic optical shaft machining center for portal frame | |
| CN203526636U (en) | Template for hole making | |
| CN102699689A (en) | Lathe bed structure of large-scale gantry numerically-controlled drilling machine | |
| CN202910302U (en) | Main shaft structure of circular seam back gouging edge milling machine | |
| CN202668076U (en) | Bed body structure of large gantry type numerical control drilling machine | |
| CN206509659U (en) | A kind of welding robot moving bracket system | |
| CN206435950U (en) | It is a kind of can frock that quickly last item is held |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 051430 Shijiazhuang Province, Luancheng City, Shijiazhuang province equipment Industrial Park, Yu Xiang street, No. 168 Patentee after: CRRC SHIJIAZHUANG CO., LTD. Address before: 050000 No. 125, front street, Shijiazhuang vehicle factory, Hebei Patentee before: CSR SHIJIAZHUANG ROLLING STOCK WORKS |
|
| CP03 | Change of name, title or address |