CN116922010A - Method for manufacturing combined stern bearing - Google Patents
Method for manufacturing combined stern bearing Download PDFInfo
- Publication number
- CN116922010A CN116922010A CN202310939462.9A CN202310939462A CN116922010A CN 116922010 A CN116922010 A CN 116922010A CN 202310939462 A CN202310939462 A CN 202310939462A CN 116922010 A CN116922010 A CN 116922010A
- Authority
- CN
- China
- Prior art keywords
- bearing
- stern
- combined
- manufacturing
- stern bearing
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 59
- 238000013461 design Methods 0.000 claims abstract description 29
- 238000005520 cutting process Methods 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 15
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 14
- 238000005260 corrosion Methods 0.000 claims abstract description 14
- 230000007797 corrosion Effects 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 238000011089 mechanical engineering Methods 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 7
- 238000004381 surface treatment Methods 0.000 claims description 11
- 238000007747 plating Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 238000007514 turning Methods 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 238000003801 milling Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000003698 laser cutting Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000004904 shortening Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses a method for manufacturing a combined stern bearing, which comprises the following steps: material preparation: selecting a suitable material, and selecting a high-strength, wear-resistant, corrosion-resistant and high-temperature-resistant material, such as high-strength alloy steel, and performing processing preparation in advance; tool device: preparing required tool equipment such as electric tools, cutting machines, welding machines and the like; size determination: and determining the size of the combined stern bearing and the shortened stern tube according to design requirements. The invention adopts proper materials, optimized structural design and scientific process flow, can reduce manufacturing difficulty and cost, improves the performance and reliability of ships and mechanical engineering equipment, solves the problems of the existing manufacturing method, improves the manufacturing efficiency and the material utilization rate, and provides a new technical means for the field of ship manufacturing.
Description
Technical Field
The invention relates to the technical field of ship manufacturing, in particular to a method for manufacturing a combined stern bearing.
Background
In the course of manufacturing ships, the stern bearing is an important component in the ship propeller, and its main function is to support the stern shaft and bear radial and axial forces on the stern shaft, and its manufacturing process and material selection have important influence on the performance and quality of the ship. The length of the stern tube is generally longer in the traditional design, so that the difficulty in design and manufacture is increased, additional cost and resource waste are brought, the manufacturing method for shortening the stern tube by combining the stern bearing in the current market is complex, the processing efficiency is low, and the material waste is serious. Therefore, there is a need to develop a new manufacturing method to improve manufacturing efficiency and material utilization.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a method for manufacturing a combined stern bearing, which can reduce the stern tube length and bring about related manufacturing advantages by effectively combining the stern bearing designs. By reducing the stern tube length, the design can be simplified, the manufacturing cost can be reduced, and the performance and reliability of ships and mechanical engineering equipment can be improved.
The invention aims at realizing the following technical scheme:
a method for making a combined stern bearing comprising the steps of:
material preparation: selecting a suitable material, and selecting a high-strength, wear-resistant, corrosion-resistant and high-temperature-resistant material, such as high-strength alloy steel, and performing processing preparation in advance;
tool device: preparing required tool equipment such as electric tools, cutting machines, welding machines and the like;
size determination: determining the size of a combined stern bearing and a shortened stern tube according to design requirements;
and (3) material processing: processing the material by using a cutting machine and a welding machine to form a basic structure of a combined stern bearing and a shortened stern tube;
surface treatment: fine machining is carried out on the surfaces of the combined stern bearing and the shortened stern tube, so that the design requirement is met;
and (3) assembling: and assembling the processed combined stern bearing and the shortened stern tube to form a complete combined stern bearing shortened stern tube.
Preferably, the preparation of the materials comprises the steps of preparing materials such as a stern bearing, a bearing pad, a stern tube, a steel plate and the like, checking the purchased materials to ensure that the quality and the specification of the purchased materials meet the requirements, and generally comprises the steps of chemical composition analysis, mechanical property test, metallographic structure observation and the like, and cutting the high-strength alloy steel materials according to the required size, wherein the cutting can be realized by mechanical cutting, flame cutting, laser cutting or the like.
The resulting high strength alloy steel material is preferably further processed, which may include turning, milling, drilling, heat treating, etc. to achieve the desired shape and size requirements.
Preferably, the combination of the stern bearings reduces the number and volume of bearings by optimizing the layout, structure and size, thereby reducing the stern tube length.
Preferably, in the optimization design, the layout of the combined stern bearing in the stern tube is reasonably planned by analyzing the design requirement of the stern tube and the actual condition of the ship or mechanical engineering, the more compact layout is used in consideration of effective utilization of space and reduction of the number of bearings, the distance between adjacent bearings can be shortened, the structure of the combined stern bearing is optimally designed to reduce the volume of the combined stern bearing, a more compact structural form or a composite structure can be adopted to reduce unnecessary space occupation, for example, the purpose of reducing the volume of the bearing is achieved by means of changing the shape of an external bearing ring, increasing an internal supporting structure or adopting an integrated design, the size of the combined stern bearing is optimally adjusted according to the actual requirement, and the volume of the bearing can be further reduced on the premise of not affecting the performance of the bearing by proper size change, for example, the diameter, the length or other critical dimensions of the bearing are changed, so that the effect of reducing the volume of the bearing is achieved.
Preferably, the surface treatment includes polishing, plating or corrosion-preventing treatment to improve corrosion resistance and appearance quality thereof.
Preferably, the combined stern bearing is assembled and tested to ensure its quality and performance.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a technical scheme for shortening the length of a stern tube by combining a stern bearing design and a manufacturing method, and can reduce manufacturing difficulty and cost, improve the performance and reliability of ships and mechanical engineering equipment, solve the problems of the existing manufacturing method, improve manufacturing efficiency and material utilization rate and provide a new technical means for the field of ship manufacturing by adopting proper materials, optimized structural design and scientific process flow.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An embodiment of the present invention provides:
a method for making a combined stern bearing comprising the steps of:
material preparation: the high-strength alloy steel has good mechanical property and durability, is widely applied to ship and mechanical engineering, can bear the working requirements under high strength and heavy load conditions, and has excellent wear resistance and corrosion resistance. In addition, the high-strength alloy steel also has good high-temperature resistance, and can keep stable performance in a high-temperature environment;
tool device: preparing required tool equipment such as electric tools, cutting machines, welding machines and the like;
size determination: determining the size of a combined stern bearing and a shortened stern tube according to design requirements;
and (3) material processing: processing the material by using a cutting machine and a welding machine to form a basic structure of a combined stern bearing and a shortened stern tube;
surface treatment: and carrying out fine processing on the surfaces of the combined stern bearing and the shortened stern tube to meet the design requirement.
Further, the preparation of materials includes preparing materials such as a stern bearing, a bearing pad, a stern tube, a steel plate and the like, checking the purchased materials to ensure that the quality and the specification of the purchased materials meet the requirements, and the materials generally include chemical component analysis, mechanical property test, metallographic structure observation and the like, and cutting the high-strength alloy steel materials according to the required size, which can be realized by mechanical cutting, flame cutting, laser cutting or the like.
Further, the high strength alloy steel material obtained by cutting is further processed, which may include processes of turning, milling, drilling, heat treatment and the like, so as to achieve the required shape and size, and the size and surface flatness of the material can be accurately controlled by turning. The use of suitable turning tools and cutting parameters ensures that the high strength alloy steel material maintains suitable temperature and mechanical properties during processing. The desired surface quality and dimensional accuracy can be obtained using appropriate milling tools and cutting parameters. Drilling can be used to machine holes of different diameters and heat and cutting forces during machining can be reduced by selecting appropriate tools and coolant. The heat treatment may alter the hardness, strength, toughness, and corrosion resistance properties of the material. Common heat treatment methods include quenching, tempering, annealing, and the like, and proper heat treatment processes are selected according to requirements. The application of these processes allows the desired shape and size requirements to be precisely achieved on the high strength alloy steel material cut. Before processing, appropriate process parameters are selected according to specific materials and requirements to ensure that the impact on material properties during processing is minimized and that optimal processing results and quality are achieved.
Further, the combined stern bearing reduces the number and the volume of the bearings by optimizing the layout, the structure and the size, thereby shortening the length of the stern tube. In the optimization design, the layout of the combined stern bearing in the stern tube is reasonably planned by analyzing the design requirement of the stern tube and the actual condition of the ship or mechanical engineering, the more compact layout is used in consideration of effective utilization of space and reduction of the number of bearings, the distance between adjacent bearings can be shortened, the structure of the combined stern bearing is optimally designed to reduce the volume of the combined stern bearing, a more compact structural form or a composite structure can be adopted to reduce unnecessary space occupation, for example, the purpose of reducing the volume of the bearing is achieved by changing the shape of an external bearing ring, adding an internal supporting structure or adopting an integrated design and other means, the size of the combined stern bearing is optimally adjusted according to the actual requirement, the volume of the bearing can be further reduced by proper size change on the premise of not affecting the performance of the bearing, for example, the diameter, the length or other key sizes of the bearing are changed, the combined bearing can be more compactly arranged inside the stern tube, and the number and the volume of the bearing are reduced, and the length of the stern tube is further reduced.
Further, the surface treatment includes polishing, plating or corrosion-preventing treatment to improve the corrosion resistance and appearance quality thereof, polishing: the surface of the material is polished mechanically or chemically to remove surface roughness and non-uniformity. Polishing can improve the surface finish of the material and make it exhibit better appearance quality. Plating: a metal plating layer is formed on the surface of a material by immersing the material in a specific plating solution. Common plating materials include nickel, chromium, zinc, and the like. The coating can provide an additional protective layer, enhance the corrosion resistance of the material, and improve its appearance. And (3) antiseptic treatment: a special corrosion-resistant coating is coated on the surface of the material to prevent contact and erosion of corrosive substances. The anti-corrosion coating is usually paint or coating material with better corrosion resistance, can provide lasting protection effect, and keeps the appearance quality of the material. The selection of an appropriate surface treatment method depends on the environment of use of the material and the target requirements. It should be noted that the surface treatment should meet the relevant regulations and environmental requirements and ensure that the impact of the treatment process on the properties of the material is minimized, and that cleaning and preparation of the material is required before the surface treatment is performed to ensure the effect and adhesion of the surface treatment. This may include degreasing, rust removal, pickling, etc., and corresponding cleaning agents and processes may be used as the case may be.
By proper surface treatment, the corrosion resistance and appearance quality of the high-strength alloy steel material can be improved, so that the overall quality and durability of the combined stern bearing are improved.
Further, the combined stern bearing is assembled and tested to ensure the quality and performance of the combined stern bearing, and all parts needing to be assembled are prepared, including an outer ring, an inner ring, rolling bodies, a retainer and the like. Ensuring that the quality and the size of each part meet the requirements. Before assembly, all parts are cleaned and dedusted to ensure clean surfaces of the parts and to prevent dust and impurities from entering the combined stern bearing. And gradually installing the parts according to the assembly sequence specified by the design. Proper tools are used as required to ensure the correct position, clearance and tightness of the components. During assembly, care should be taken in lubrication of the bearings. According to design and use requirements, proper lubricants are applied at proper locations to reduce friction and wear of bearings and to improve their operating efficiency and life. During assembly, quality control checks are performed. And checking whether the assembled combined stern bearing meets the design requirement and the specified quality standard. Necessary adjustments and corrections are made to ensure the quality of the combined stern bearing if necessary. After assembly, the combined stern bearing needs to be tested to verify its performance and quality. The test procedure may include the following: the dimensions of the combined stern bearing, including outer diameter, inner diameter, width, etc., are measured and verified for their compatibility with design requirements and associated mating dimensions. The friction characteristics and rotation performance of the combined stern bearing were tested by applying appropriate load and rotation speed. And observing and measuring the rotation resistance, the rotation speed, the running stability and the like of the bearing. And (3) applying normal working load or design load to the combined stern bearing, and testing the working performance and bearing capacity of the combined stern bearing under a certain load. Through long-time operation, cyclic loading and other tests, the durability and the service life of the combined stern bearing are verified. Through the assembly and testing process, the quality and performance of the combined stern bearing can be ensured to meet the design requirements, and the required reliability and durability requirements are met.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. A method for making a combined stern bearing comprising the steps of:
material preparation: selecting a suitable material, and selecting a high-strength, wear-resistant, corrosion-resistant and high-temperature-resistant material, such as high-strength alloy steel, and performing processing preparation in advance;
tool device: preparing required tool equipment such as electric tools, cutting machines, welding machines and the like;
size determination: determining the size of a combined stern bearing and a shortened stern tube according to design requirements;
and (3) material processing: processing the material by using a cutting machine and a welding machine to form a basic structure of a combined stern bearing and a shortened stern tube;
surface treatment: fine machining is carried out on the surfaces of the combined stern bearing and the shortened stern tube, so that the design requirement is met;
and (3) assembling: and assembling the processed combined stern bearing and the shortened stern tube to form a complete combined stern bearing shortened stern tube.
2. A method for manufacturing a combined stern bearing as claimed in claim 1, characterised in that the material preparation comprises the need to prepare stern bearings, bearing pads, stern tubes, steel plates etc. the purchased material is inspected to ensure that its quality and specifications are satisfactory, which generally comprises chemical analysis, mechanical performance testing and metallographic structure observation etc. the high strength alloy steel material is cut to the required dimensions, which can be achieved by mechanical cutting, flame cutting or laser cutting etc.
3. A method for manufacturing a combined stern bearing as claimed in claim 2, characterised in that the resulting high strength alloy steel material is further processed, possibly including turning, milling, drilling, heat treatment etc. to achieve the desired shape and size requirements.
4. A method for manufacturing a combined stern bearing as claimed in claim 1, wherein the combined stern bearing is reduced in number and volume by optimizing layout, structure and dimensions, thereby reducing the stern tube length.
5. The method for manufacturing a combined stern bearing according to claim 4, wherein in the optimal design, the layout of the combined stern bearing in the stern tube is reasonably planned by analyzing the design requirement of the stern tube and the actual situation of the ship or the mechanical engineering, in consideration of effective utilization of space and reduction of the number of bearings, a more compact layout can be used, the distance between adjacent bearings can be shortened, the structure of the combined stern bearing is optimally designed to reduce the volume thereof, a more compact structural form or a composite structure can be adopted to reduce unnecessary space occupation, for example, the purpose of reducing the volume of the bearing is achieved by means of changing the shape of an external bearing ring, increasing an internal supporting structure or adopting an integrated design, the size of the combined stern bearing is optimally adjusted according to the actual needs, and the volume of the bearing can be further reduced by proper size change without affecting the performance of the bearing, for example, the diameter, the length or other critical dimensions of the bearing are changed to realize the effect of reducing the volume of the bearing.
6. A method for manufacturing a combined stern bearing as claimed in claim 2, wherein the surface treatment comprises polishing, plating or corrosion-resistant treatment to improve its corrosion resistance and appearance quality.
7. A method for manufacturing a combined stern bearing as claimed in claim 1, in which the combined stern bearing is assembled and tested to ensure its quality and performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310939462.9A CN116922010A (en) | 2023-07-28 | 2023-07-28 | Method for manufacturing combined stern bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310939462.9A CN116922010A (en) | 2023-07-28 | 2023-07-28 | Method for manufacturing combined stern bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116922010A true CN116922010A (en) | 2023-10-24 |
Family
ID=88394002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310939462.9A Pending CN116922010A (en) | 2023-07-28 | 2023-07-28 | Method for manufacturing combined stern bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116922010A (en) |
-
2023
- 2023-07-28 CN CN202310939462.9A patent/CN116922010A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1985100B (en) | Rolling device | |
| KR20030085529A (en) | Chemical mechanical machining and surface finishing | |
| Tarelnyk et al. | New method of friction assemblies reliability and endurance improvement | |
| EP2385995B1 (en) | Wear resistant coating method | |
| CN111139465A (en) | Manufacturing method for manufacturing composite steel pipe by laser | |
| CN108342727A (en) | A kind of laser strengthening method of straightening roll | |
| EP2434172B1 (en) | Roller and cage assembly, roller bearing and cage assembly, and cage | |
| JPH1161337A (en) | Rolling member and rolling device provided with the same | |
| CN110666386B (en) | Research method for improving performance parameters of argon arc welding surfacing process | |
| CN116922010A (en) | Method for manufacturing combined stern bearing | |
| EP1199495B1 (en) | Toroidal continuously variable transmission and a process for producing the toroidal continuously variable transmission | |
| Vicen et al. | Tribological behaviour of the sucaslide diamond-like carbon coating | |
| JP2004003627A (en) | Shaft, planetary gear device and cam follower | |
| CN114985238A (en) | Wear-resistant gasket of graphene composite lubricating coating and production process thereof | |
| JP2007524045A (en) | Rolling bearing with nickel-phosphorus coating | |
| CN114270060B (en) | Material handling for diamond-to-diamond reactive material bearing bonding | |
| CN111519123B (en) | Preparation method of tin-based Babbitt alloy coating containing high carbon fibers | |
| Pogonishev et al. | Tribotechnical characteristics of composite coatings deposited by spraying | |
| CN111560580B (en) | Manufacturing method of tin-based babbitt metal coating containing carbon fiber C12 | |
| WO2023037846A9 (en) | Machine component | |
| Stadler et al. | Different performance aspects of black oxide coating for bearing applications | |
| JP2010101185A (en) | Rocker arm assembly | |
| JP2009204078A (en) | Rolling device | |
| CN116641051A (en) | Technological method for laser repair of circumferential surface of crankshaft | |
| Kubota et al. | Development of Fracture-Split Connecting Rods Made of Titanium Alloy for Use on Supersport Motorcycles |
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 |