CN104438492A - Curve face forming technology for high-intensity thick plate in bridge steel structure construction - Google Patents
Curve face forming technology for high-intensity thick plate in bridge steel structure construction Download PDFInfo
- Publication number
- CN104438492A CN104438492A CN201410577472.3A CN201410577472A CN104438492A CN 104438492 A CN104438492 A CN 104438492A CN 201410577472 A CN201410577472 A CN 201410577472A CN 104438492 A CN104438492 A CN 104438492A
- Authority
- CN
- China
- Prior art keywords
- curve face
- veneer reeling
- curved surface
- thick plate
- reeling machine
- 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
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a curve face forming technology for a high-intensity thick plate in bridge steel structure construction. Pre-pressing values which need to be borne by taper curve face thick plates with different curvature radiuses during a rolling process are determined by finite element analysis, curvature radius deviation caused by veneer reeling machine factors is lowered, meanwhile, horizontal eccentricity happening during a veneer reeling process is avoided through a limiting idler wheel, and the machining accuracy of the taper curve face thick plates is guaranteed. According to the thick plate curve face forming technology, a new machining method is provided for taper curve face thick plate forming machining, and the problems that thickness plate taper curve face forming machining is low in efficiency and high in cost, and accuracy cannot be guaranteed easily are solved.
Description
Technical field
The present invention is specifically related to a kind of conical camber moulding process for high-strength plank, belongs to bridge steel structure technical field of construction.
Background technology
The steel construction that conical camber slab is current is mainly used in spherical tank, have modeling requirement and steel structure bridge field, adopt the steel construction bridge tower of curved surface slab to have novel structure, feature handsome in appearance, obtain a large amount of employings in field of bridge construction at present.But the conical camber slab be applied on steel bridge tower is because of features such as its intensity is high, difficulty of processing is large, the difficult controls of precision, becomes restriction steel bridge tower and manufacture one of principal element of progress and workmanship.
At present to moulding process many employings large-sized bender Bending Processing of conical camber slab or adopt veneer reeling machine to be rolled into the method that cylinder carries out second-order correction again, though these methods can meet the instructions for use as steel construction part substantially, the construction technology that high for some standard-requireds, that the duration is tight project is not best suited for.
Mainly there is following defect in conventional slab curved surface forming technique:
1, working (machining) efficiency is low, incurs loss through delay the time started of subsequent handling.
2, drop into personnel, material, auxiliary equipment are many, processing cost is high.
3, the machining accuracy of conical camber is wayward.
Summary of the invention
In order to overcome, existing slab curved surface forming processes efficiency is low, processing cost is high, the uppity deficiency of machining accuracy, the invention provides a kind of slab curved surface forming technique, make machining accuracy more easy to control improving on slab curved surface forming working (machining) efficiency, the basis that cuts down finished cost.
Technical solution problem of the present invention provides following scheme:
A kind of curved surface forming technique for the high-strength plank in bridge steel structure construction, veneer reeling machine is utilized to carry out the processing and forming of conical camber to high-strength plank, by to carry out in finite element analysis determination veneer reeling machine coiling process precompressed value to conical camber steel plate coiling process and roll number of times, by the horizontal eccentricity value in limited roller restriction conical camber steel plate coiling process.
Limited roller is located at veneer reeling machine stiff end, vertically arranges in 1200mm position, both sides, upper roller of press brake center.
Limited roller freely can rotate around its axle center, and in bending thick plates process, limited roller outer surface is close in one-sided end.
Advantage of the present invention:
1, by the precompressed value that finite element analysis determination slab bears in curved surface forming process, the conical camber slab two ends Curvature Radius Deviation that veneer reeling machine equipment error causes can be reduced.
2, by the position-limiting action of limited roller, ensure that slab bias does not occur in curved surface forming rolls, ensure that slab produces deviation in head tower section assembling process.
3, utilize veneer reeling machine to carry out processing without the need to the slab curved surface forming of second-order correction, optimize the work flow of slab curved surface forming, decrease the input of equipment, personnel and auxiliary material, saved production cost, improve production efficiency.
4, slab curved surface forming technology is advanced, economical rationality, and applicability is strong, has larger promotional value.
Accompanying drawing explanation
Fig. 1 is spacing scroll wheel positions schematic diagram.
Fig. 2 is spacing rolling wheel structure schematic diagram.
Detailed description of the invention
See accompanying drawing, a kind of curved surface forming technique for the high-strength plank in bridge steel structure construction, veneer reeling machine is utilized to carry out the processing and forming of conical camber to high-strength plank, by to carry out in finite element analysis determination veneer reeling machine coiling process precompressed value to conical camber steel plate coiling process and roll number of times, limit the horizontal eccentricity value in conical camber steel plate coiling process by limited roller 1.Limited roller 1 is located at veneer reeling machine stiff end, vertically arranges in 1200mm position, both sides, upper roller of press brake center.
Limited roller 1 freely can rotate around its axle center, and in bending thick plates process, limited roller outer surface is close in one-sided end.
Concrete forming step is:
1) can draw according to finite element analysis the precompressed value that the conical camber plate two ends of different curvature radius should bear.
2) utilize mapping software to release the expanded view of conical camber slab, obtain size, two ends radian, arc length data after launching.
3) on steel plate, mark conical camber processing appearance and size, and on steel plate, indicate machining center line, dated radius of machining, utilize the accurate blanking of semi-automatic gas cutting machine.
4) send sheet material to, to material, steel plate small curvature radius is held out against at veneer reeling machine stiff end and limited roller (Fig. 1).
5) by determining that precompressed value carries out the pre-bending of steel plate both side ends, then steel plate cross central line is moved to upper roller of press brake center.
6) carried out rolling and getting back to initial position to steel plate one side end by plate centre line by the precompressed value determined, then get back to initial position after rolling to steel plate opposite side termination, by 4 times roll, make steel plate two ends radius of curvature reach designing requirement.
7) checked by radius of curvature model, carry out necessary repair after determining deviate and bend, until shaping conical camber plate two ends radian meets instructions for use.
8) conical camber plate unloads lower platform by veneer reeling machine overturning end.
Claims (3)
1. the curved surface forming technique for the high-strength plank in bridge steel structure construction, veneer reeling machine is utilized to carry out the processing and forming of conical camber to high-strength plank, it is characterized in that: by carry out in finite element analysis determination veneer reeling machine coiling process precompressed value to conical camber steel plate coiling process and roll number of times, by the horizontal eccentricity value in limited roller restriction conical camber steel plate coiling process.
2. slab curved surface forming technique according to claim 1, is characterized in that: limited roller is located at veneer reeling machine stiff end, vertically arranges in 1200mm position, both sides, upper roller of press brake center.
3. slab curved surface forming technique according to claim 1, is characterized in that: limited roller freely can rotate around its axle center, and in bending thick plates process, limited roller outer surface is close in one-sided end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410577472.3A CN104438492B (en) | 2014-10-24 | 2014-10-24 | The curved surface forming technique of the high-strength plank in constructing for bridge steel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410577472.3A CN104438492B (en) | 2014-10-24 | 2014-10-24 | The curved surface forming technique of the high-strength plank in constructing for bridge steel structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104438492A true CN104438492A (en) | 2015-03-25 |
| CN104438492B CN104438492B (en) | 2016-09-28 |
Family
ID=52885685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410577472.3A Active CN104438492B (en) | 2014-10-24 | 2014-10-24 | The curved surface forming technique of the high-strength plank in constructing for bridge steel structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104438492B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3768292A (en) * | 1972-04-20 | 1973-10-30 | Tsuru Tekkosho Kk | Machines for bending segmental annular plate or sheet into conical frustom |
| JPS62137123A (en) * | 1985-12-11 | 1987-06-20 | Masanori Mochizuki | Roll bending machine |
| CN1075435A (en) * | 1992-02-17 | 1993-08-25 | 董恒贞 | Processing method for curved shell plate |
| CN102189155A (en) * | 2011-02-23 | 2011-09-21 | 雅泰实业集团有限公司 | Metal plate double-curved surface processing technology and equipment |
| CN102921741A (en) * | 2012-10-25 | 2013-02-13 | 苏州有色金属研究院有限公司 | Modeling method of finite element model for calculating roll gap crown of special roll shape of rolling mill |
-
2014
- 2014-10-24 CN CN201410577472.3A patent/CN104438492B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3768292A (en) * | 1972-04-20 | 1973-10-30 | Tsuru Tekkosho Kk | Machines for bending segmental annular plate or sheet into conical frustom |
| JPS62137123A (en) * | 1985-12-11 | 1987-06-20 | Masanori Mochizuki | Roll bending machine |
| CN1075435A (en) * | 1992-02-17 | 1993-08-25 | 董恒贞 | Processing method for curved shell plate |
| CN102189155A (en) * | 2011-02-23 | 2011-09-21 | 雅泰实业集团有限公司 | Metal plate double-curved surface processing technology and equipment |
| CN102921741A (en) * | 2012-10-25 | 2013-02-13 | 苏州有色金属研究院有限公司 | Modeling method of finite element model for calculating roll gap crown of special roll shape of rolling mill |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104438492B (en) | 2016-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104339124B (en) | A kind of rustless steel cylinder multi-curvature forming method | |
| CN101954400B (en) | Continuous roll cold bending forming method for stainless steel water stop strips | |
| CN205763065U (en) | The steel construction plate leveling machinery that a kind of work efficiency is high | |
| CN102581566A (en) | Sleeve rolling process | |
| CN104438355A (en) | Hot rolling flattening technology for eliminating strip steel wave shape defects | |
| CN102489569A (en) | Continuous cold roll forming method for stainless steel vehicle roof boundary beam | |
| CN102513473B (en) | Continuous roller type cold-roll forming process for stainless steel covering panels of car bodies | |
| CN104438492A (en) | Curve face forming technology for high-intensity thick plate in bridge steel structure construction | |
| CN203664413U (en) | Straightening device of long shafts | |
| CN104801578A (en) | Bending method for three-roller plate bending machine | |
| CN101749051B (en) | Method for designing blank material for use in rolling of blade without tenon at two ends | |
| WO2016184054A1 (en) | Bending method for three-roller plate bending machine | |
| CN206229934U (en) | A kind of reinforcing bar pre-bending hydraulic tongs | |
| CN103084450A (en) | Once forming stamping method of double-parabolic plate with consistent thickness | |
| CN102463276A (en) | Manufacturing method of a bent part and bending machine | |
| CN203170770U (en) | Bar material straightening roller and straightening machine | |
| CN205342453U (en) | Hoist davit section bar one -time forming machine group | |
| CN203991769U (en) | H type flange of beam curvature of the spinal column means for correcting | |
| CN103157654B (en) | Rolling manufacturing technique of semi-circle plate for oil drilling platform spud legs | |
| CN203991840U (en) | Tetraxon material bending machine | |
| CN208592268U (en) | A kind of building steel tube straightener | |
| CN202555644U (en) | Mold frame suitable for thick wall steel pipe bended arc | |
| TWI533951B (en) | The production method of the rainwater ditch of the rail car and the production equipment used in the production method thereof | |
| CN203900332U (en) | Correction stirrup twisting mechanism of steel bar automatic stirrup bending machine | |
| CN102513986A (en) | Method for integrally lofting and cutting shell plate of polar band plate of spherical tank through sample plate of equatorial plate |
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 | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230022 China Railway Fourth Bureau Group Steel Structure Co., Ltd. No. 388 Huanhu East Road, Hefei City, Anhui Province Patentee after: Steel structure building Co., Ltd. of the four Bureau of China Railway Address before: 230022 China Railway Fourth Bureau Group Steel Structure Co., Ltd. No. 388 Huanhu East Road, Hefei City, Anhui Province Patentee before: Steel Structure Co., Ltd. of China Tiesiju Civil Engineering Group |
|
| CP01 | Change in the name or title of a patent holder |