CN104947587A - U-shaped rib and manufacturing method thereof - Google Patents
U-shaped rib and manufacturing method thereof Download PDFInfo
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- CN104947587A CN104947587A CN201510260608.2A CN201510260608A CN104947587A CN 104947587 A CN104947587 A CN 104947587A CN 201510260608 A CN201510260608 A CN 201510260608A CN 104947587 A CN104947587 A CN 104947587A
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Abstract
The invention discloses a U-shaped rib and a manufacturing method thereof. A product can be widely applied to an orthotropic plate structure. The inner sides and the outer sides of the ends of side plates of the U-shaped rib are gradually thickened from the center line of the plate thickness from bottom to top in the opposite directions, and therefore the welding size of the U-shaped rib and a panel is increased, and the eccentric load of a traditional U-shaped rib weld line is changed into an axis load. An integral hot rolling thickening method, a partial hot pressing thickening method or a partial cold punching thickening method can be adopted for end thickening. Continuous rolling and gradual change forming are adopted in the U-shaped rib manufacturing method, and the problems that in the traditional U-shaped rib forming machining process, impacting bending is adopted, and consequently stress concentration is caused, and longitudinal cracks are prone to being generated are solved. During continuous rolling forming of the U-shaped rib, die extruding or cutter cutting is synchronously adopted, a truncated edge and a groove needed for welding are machined in the ends of the side plates of the U-shaped rib, the situation that according to a traditional U-shaped rib, flame cutting can be adopted only after side planing or punching bending forming is carried out is changed, and the forming quality and efficiency of the truncated edge and the groove are greatly improved.
Description
Technical field
The invention belongs to the technical field of bridge steel structure and other orthotropic rectangular plates structures, particularly a kind of remain silent stiffening rib and manufacture method thereof for cross bridge floor board and other orthotropic rectangular plates structure.
Background technology
At present, cross bridge floor board is widely applied in bridge engineering, and cross bridge floor board is formed primarily of steel bridge deck and the crossbeam welded with it, vertical rib, and crossbeam is mainly diaphragm, and vertical rib is mainly remain silent stiffening rib and U-shaped rib.
Because the thickness of diaphragm is generally at more than 12mm, and can two-sided welding when diaphragm welds with bridge deck, therefore, welding quality is comparatively reliable.And U-shaped rib is closed configuration, the mode of outside one side welding can only be adopted, and the U-shaped rib generally adopted at present is that 6 ~ 8mm is all thick substantially, in order to ensure that U-shaped rib is not burnt when welding, the root face of 2 ~ 3mm also to be left, the weld size of U-shaped like this rib and bridge deck is just very little, apparent throat can not reach and mother metal equal strength, and weld seam centre of form substantial deviation mother metal axis, therefore, bridge floor is under the repeated action of wheel load, and between bridge deck and U-shaped rib, weld seam is easy to fatigue cracking.Fatigue crack once produce the rigidity that will reduce bridge deck, and causes the destruction of bridge deck pavement thus, even jeopardizes the use of bridge.
In addition, generally adopting at present and first dig groove, then bender and impact shaping method to manufacture U-shaped rib, there is the problem that flex area stress is concentrated, easily produced longitudinal crack in the U-shaped rib manufactured like this.
Summary of the invention
For the little and weld seam centre of form substantial deviation U-shaped rib mother metal axis of the weld size solving existing U-shaped rib and bridge deck, cause the easy fatigue cracking of weld seam and adopt the U-shaped rib of pressing and bending method manufacture to there is flex area stress at present the problem concentrated, easily produce longitudinal crack, the invention provides a kind of U-shaped rib and manufacture method thereof of end upsetting.
For solving the problems of the technologies described above, the technology used in the present invention is designed to:
A kind of U-shaped rib, comprise a base plate and biside plate, described base plate and side plate are structure as a whole, described base plate is dull and stereotyped or arc, described biside plate is inclined to trapezoidal, and the inner side and outer side of the end of described side plate is from the center line of thickness of slab progressive additive in opposite directions from the bottom to top, and the outside of side end is provided with welding groove, end face leaves root face, this U-shaped rib adopts the gradual change of one continuous rolling shaping after side end thickens, and the groove synchronously processed in the end of side plate needed for welding and root face.
Preferably, the inner side and outer side of described side end is that circular arc gradual change or rectigradation thicken from the center line of thickness of slab in opposite directions.The circular arc gradual change place of thickening does not have obvious transition contact, comparatively has the linear gradient of obvious transition contact to thicken to effectively reduce the stress at transition contact place to concentrate.
Preferably, described side end end thicken adopt to thicken with overall hot rolling spot heating compression and thickening or first cold pier thicken the processing method of after annealing process.
Preferably, the groove needed for the welding of described side end and root face is extruded by mould or Tool in Cutting processes.
Preferably, the bevel angle of described groove is 35 ° ~ 55 °, and the root face that described groove stays is of a size of 2 ~ 3mm.
Preferably, the height of described U-shaped rib is 280mm, and width is 300mm.
Correspondingly, the manufacture method of above-mentioned U-shaped rib comprises the following steps: (1) by the inner side and outer side of the side end of U-shaped rib from the center line of thickness of slab progressive additive in opposite directions from the bottom to top; (2) after side end thickens, this U-shaped rib adopts the gradual change of one continuous rolling shaping, and synchronous mould extruding or the Tool in Cutting of adopting processes groove needed for welding and root face in side end.
Preferably, step (1) latus inframedium end thicken adopt overall hot rolling to thicken spot heating compression and thickening or first cold pier thicken the processing method of after annealing process.
Preferably, the groove needed for step (2) latus inframedium welding edges and root face are extruded by mould or Tool in Cutting processes.
The present invention by by the inner side and outer side of the side end of U-shaped rib from the center line of thickness of slab progressive additive in opposite directions from the bottom to top, and the outside of side end is provided with welding groove, end face leaves root face, single-sided welding can only be carried out from outside at the U-shaped rib of adaptation, and weld size can not meet with under the equicohesive prerequisite of U-shaped rib mother metal, weld size can be strengthened, increase the apparent throat of U-shaped rib and bridge deck, the eccentric load of the original weld seam centre of form is become axial load, improve the bonding strength of U-shaped rib and bridge deck weld, improve the anti-fatigue performance of weld seam, little and the weld seam centre of form substantial deviation mother metal axis of the weld size solving existing U-shaped rib and bridge deck, cause the problem of the easy fatigue cracking of weld seam, by adopting one continuous rolling gradual change forming technique, avoid the problem generally adopting at present the U-shaped rib of pressing and bending method manufacture to there is flex area stress to concentrate, easily produce longitudinal crack, improve product quality and production efficiency, product can be widely used in cross bridge floor board and other orthotropic rectangular plates structure.
Accompanying drawing explanation
Fig. 1 is the structural representation of the U-shaped rib cross section of one embodiment of the invention;
Fig. 2 is A place, end shown in Fig. 1 enlarged diagram;
In figure: 1, base plate; 2, side plate; 21, side end; 211, groove; 3, panel.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Fig. 1 ~ 2, the U-shaped rib of the present embodiment comprises a base plate 1 and biside plate 2, base plate 1 and side plate 2 are structure as a whole, base plate 1 is dull and stereotyped, side plate 2 passes through arc transition anatomical connectivity at the two ends of base plate 1, biside plate 2 is inclined to trapezoidal, the inner side and outer side of side end 21 is from the center line of thickness of slab progressive additive in opposite directions from the bottom to top, and the inner side and outer side of side end 21 all thickens in circular arc gradual change, the outside of side end 21 is provided with welding groove 211, end face leaves root face, to weld with panel 3, this U-shaped rib adopts the gradual change of one continuous rolling shaping after side end thickens, and synchronously process groove needed for welding and root face in side end.
Particularly, in the present embodiment, the arc radius that the inner side and outer side circular arc gradual change of side end 21 thickens is 140 ~ 150mm, the bevel angle α of groove 211 is 35 ° ~ 55 °, root face is of a size of 2 ~ 3mm, and the height of U-shaped rib is 280mm, and width is 300mm, above-mentioned numerical value specifically should be determined as the case may be in construction in design or related standards span, ensures its applicability for different situations and reasonability.
Preferably conventional as one, the arc radius that the inner side and outer side circular arc gradual change of side end 21 thickens is 143.7mm, and the bevel angle α of groove 211 is 45 °, and root face is of a size of 2mm, and the height of U-shaped rib is 280mm, and width is 300mm.The determination of above numerical value is the optimization value done for the dimensional parameters of current conventional U-shaped rib, has stronger practicality.Also can thicken with the variable cross-section that method of the present invention processes other specifications stiffening rib of remaining silent natch.
Correspondingly, the manufacture method of above-mentioned U-shaped rib comprises the following steps: (1) by the inner side and outer side of the side end of U-shaped rib from the center line of thickness of slab progressive additive in opposite directions from the bottom to top; (2) after side end thickens, this U-shaped rib adopts the gradual change of one continuous rolling shaping, and synchronously processes groove needed for welding and root face in side end.
Preferably, step (1) latus inframedium end thicken adopt overall hot rolling to thicken spot heating compression and thickening or first cold pier thicken the processing method of after annealing process.
Preferably, the groove needed for step (2) latus inframedium welding edges and root face are extruded by mould or Tool in Cutting processes.This kind of processing method change conventional u-shaped rib finished edge and root face must first carry out plane limit or pressing and bending shaping after adopt gas flame cuttiug again, greatly improve groove and the shaping quality of root face and efficiency.
In the present embodiment, U-shaped rib is thick and one continuous rolling gradual change is shaping by end heat pier, and side end 21 thickening place adopts particular manufacturing craft extruded.Apparently, also by the cold pier of overall hot-roll forming or end is extruded etc., processes forms U-shaped rib end upsetting.In addition, also go out the special type roll bending of end upsetting by the direct hot rolling of steel mill, then adopt one continuous rolling gradual change method that is shaping and the synchronous accurately cutting forming in end to manufacture U-shaped rib.
The present invention by by the inner side and outer side of the side end of U-shaped rib from the center line of thickness of slab progressive additive in opposite directions from the bottom to top, and the outside of side end is established and is had welding groove, end face leaves root face, single-sided welding can only be carried out from outside at the U-shaped rib of adaptation, and weld seam can not meet with under the equicohesive prerequisite of U-shaped rib mother metal, weld size can be strengthened, increase the weld strength of U-shaped rib and bridge deck, the eccentric load of the original weld seam centre of form is become axial load, improve the bonding strength of U-shaped rib and bridge deck weld, improve the anti-fatigue performance of weld seam, little and the weld seam centre of form substantial deviation mother metal axis of the weld size solving existing U-shaped rib and bridge deck, cause the problem of the easy fatigue cracking of weld seam, by adopting one continuous rolling gradual change forming technique, avoid the problem generally adopting at present the U-shaped rib of pressing and bending method manufacture to there is flex area stress to concentrate, easily produce longitudinal crack, improve product quality and production efficiency, product can be widely used in cross bridge floor board and other orthotropic rectangular plates structure.
By reference to the accompanying drawings embodiments of the invention are explained in detail above; but the present invention is not limited to above-described embodiment; in the ken that those of ordinary skill in the art possess; various change can also be made obtaining under the prerequisite not departing from present inventive concept, also should be considered as protection scope of the present invention.
Claims (9)
1. a U-shaped rib, comprise a base plate and biside plate, described base plate and side plate are structure as a whole, described base plate is dull and stereotyped or arc, described biside plate is inclined to trapezoidal, it is characterized in that: the inner side and outer side of the end of described side plate is from the center line of thickness of slab progressive additive in opposite directions from the bottom to top, and the outside of side end is provided with welding groove, end face leaves root face, this U-shaped rib adopts one continuous rolling gradual change shaping after side end thickens, and synchronously processes groove needed for welding and root face in side end.
2. U-shaped rib according to claim 1, is characterized in that: the inner side and outer side of described side end is that circular arc gradual change or rectigradation thicken in opposite directions centered by the center line of side plate thickness of slab.
3. U-shaped rib according to claim 1, is characterized in that: described side end thicken adopt overall hot rolling to thicken spot heating compression and thickening or first cold pier thicken the processing method of after annealing process.
4. U-shaped rib according to claim 1, is characterized in that: the groove needed for the welding of described side end and root face is extruded by mould or Tool in Cutting processes.
5. U-shaped rib according to claim 1, is characterized in that: described bevel angle is 35 ° ~ 55 °, and the root face that stays is 2 ~ 3mm.
6. U-shaped rib according to claim 1, is characterized in that: the height of described U-shaped rib is 280mm, and width is 300mm.
7. a manufacture method for U-shaped rib, is characterized in that comprising the following steps: (1) by the inner side and outer side of the side end of U-shaped rib from the center line of thickness of slab progressive additive in opposite directions from the bottom to top; (2) after side end thickens, this U-shaped rib adopts the gradual change of one continuous rolling shaping, and synchronously processes groove needed for welding and root face in side end.
8. the manufacture method of U-shaped rib according to claim 7, is characterized in that: the thickening of step (1) latus inframedium end adopt overall hot rolling to thicken spot heating compression and thickening or first cold pier thicken the processing method of after annealing process.
9. the manufacture method of U-shaped rib according to claim 7, is characterized in that: the groove needed for step (2) latus inframedium welding edges and root face are extruded by mould or Tool in Cutting processes.
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| CN201510260608.2A CN104947587A (en) | 2015-05-21 | 2015-05-21 | U-shaped rib and manufacturing method thereof |
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Cited By (8)
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| CN105312905A (en) * | 2015-11-09 | 2016-02-10 | 江阴建禾钢品有限公司 | Non-equal-thickness U-rib production line |
| CN106735727A (en) * | 2016-12-12 | 2017-05-31 | 上海振华重工(集团)股份有限公司 | The single track welding method of U-shaped floor |
| CN108265625A (en) * | 2018-01-28 | 2018-07-10 | 北京工业大学 | A kind of U-shaped rib and processing method |
| CN110605494A (en) * | 2019-10-10 | 2019-12-24 | 清华大学 | Detachable assembled steel box girder U rib structure and process |
| CN111305090A (en) * | 2020-03-17 | 2020-06-19 | 张其凤 | Bridge reinforcing device and reinforcing method |
| CN111545940A (en) * | 2020-05-06 | 2020-08-18 | 深圳市市政设计研究院有限公司 | Anti-fatigue orthotropic plate structure and production process |
| CN114654171A (en) * | 2022-03-30 | 2022-06-24 | 中铁宝桥（扬州）有限公司 | U-rib embedding section tool and manufacturing and using method |
| CN115139022A (en) * | 2022-08-29 | 2022-10-04 | 南通泰胜蓝岛海洋工程有限公司 | Welding process for rack plate and semicircular plate of pile leg of drilling platform |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105312905A (en) * | 2015-11-09 | 2016-02-10 | 江阴建禾钢品有限公司 | Non-equal-thickness U-rib production line |
| CN105312905B (en) * | 2015-11-09 | 2018-02-02 | 江阴建禾钢品有限公司 | Non- uniform thickness U rib production lines |
| CN106735727A (en) * | 2016-12-12 | 2017-05-31 | 上海振华重工(集团)股份有限公司 | The single track welding method of U-shaped floor |
| CN108265625A (en) * | 2018-01-28 | 2018-07-10 | 北京工业大学 | A kind of U-shaped rib and processing method |
| CN110605494A (en) * | 2019-10-10 | 2019-12-24 | 清华大学 | Detachable assembled steel box girder U rib structure and process |
| CN110605494B (en) * | 2019-10-10 | 2020-07-24 | 清华大学 | Detachable assembled steel box girder U rib structure and process |
| CN111305090A (en) * | 2020-03-17 | 2020-06-19 | 张其凤 | Bridge reinforcing device and reinforcing method |
| CN111305090B (en) * | 2020-03-17 | 2021-08-03 | 烟台大学 | Bridge reinforcing device and reinforcing method |
| CN111545940A (en) * | 2020-05-06 | 2020-08-18 | 深圳市市政设计研究院有限公司 | Anti-fatigue orthotropic plate structure and production process |
| CN111545940B (en) * | 2020-05-06 | 2021-01-15 | 深圳市市政设计研究院有限公司 | Anti-fatigue orthotropic plate and production process thereof |
| CN114654171A (en) * | 2022-03-30 | 2022-06-24 | 中铁宝桥（扬州）有限公司 | U-rib embedding section tool and manufacturing and using method |
| CN115139022A (en) * | 2022-08-29 | 2022-10-04 | 南通泰胜蓝岛海洋工程有限公司 | Welding process for rack plate and semicircular plate of pile leg of drilling platform |
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Application publication date: 20150930 |