CN1005689B - Hot rolling process for h-shaped steel beam with corrugated web - Google Patents
Hot rolling process for h-shaped steel beam with corrugated web Download PDFInfo
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- CN1005689B CN1005689B CN86106315.5A CN86106315A CN1005689B CN 1005689 B CN1005689 B CN 1005689B CN 86106315 A CN86106315 A CN 86106315A CN 1005689 B CN1005689 B CN 1005689B
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- shaped steel
- web plate
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- steel beam
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Abstract
An H-shaped steel beam with a corrugated web plate is a novel profile with an economical cross section. The present invention relates to a hot rolling process of an H-shaped steel beam with a corrugated web plate and a product of the process. The present invention is mainly characterized in that horizontal rollers of a universal finishing machine base of a hot-rolled H-shaped steel beam with a straight web plate are changed into forming rollers with curves in a specific roller shape; after passing through the machine base, an H-shaped hot-rolled blank with a straight web plate, which is used as an incoming material, is formed in one step under a proper down-pressing system to form H-shaped steel with periodic corrugation transversely along the entire web plate, namely H-shaped steel with a corrugated web plate. Since the transverse corrugation greatly enhances the bending rigidity of the web plate, the buckling strength is enhanced by two to three times. Compared with the H-shaped steel with a straight web plate, the product can save metal by 10 to 15%.
Description
The invention belongs to the rolling technical field of metal
The web of H section steel beam mainly works to transmit shear stress, in order to make full use of web material to save metal, wishes that web gets over Bao Yuehao.Yet, the existence of web internal pressure stress component has greatly limited the thin-walled property of web, this is because the bending rigidity of ordinary straight web is very little, under the effect of external applied load, though stress does not also reach yieldlimit, but when the compression component in the web plane surpasses certain critical value 〈 ﹠﹠〉time, web big lateral displacement will occur and local buckling takes place, and causes the integral body of beam to be destroyed very soon.
Replace buckling strength and the bearing capacity that straight web can improve web effectively with corrugated web.At present, some country's employing cold forming method has the H section steel beam of ripple produced web in the ratio-frequency welding wiring in the middle part of in the world, and has obtained good economic benefits.
The purpose of this invention is to provide the hot rolling technology of producing the high-quality H-shaped steel beam with corrugated web in enormous quantities.
Adopting the hot continuous rolling unit production antinode H shaped steel of production ordinary straight abdomen H section steel beam is one of main feature of the present invention, thereby has created advantage for producing Ripple Sternum in enormous quantities.In order to shut out the H section steel beam that vertically has horizontal cycle ripple along whole web, need be changed to format roll to the horizontal roller of planishing stand.The profile of format roll is similar to spur gear wheel, and several teeth are arranged on outer cylinder surface.During work, tooth top is pressed into web in the tooth root, and in each moment, all has a minimum range between tooth top and tooth root and remains constantly, and this distance is exactly the thickness of corrugated web finished product.The effect of edger roll is to the less drafts in the edge of a wing, makes flange surfaces smooth, thereby eliminates because the metal accumulation of the flange surfaces trace that distortion caused of web and draw thin phenomenon.Behind rolled piece process roughing and the edging, it is flat that web remains, and is antinode H section steel beam at the finishing pass once-forming only.In order to prevent bigger residual stress and to guarantee the stable of the operation of rolling, the drafts of web should not be too big; And when drafts too hour, product surface is not bright and clean, influences its serviceability.Reasonably drafts is: drafts ε 1=5～10% of web, and drafts ε 2=ε 1+1～5% on the edge of a wing, rolling temperature is 900～1200 ℃.
The format roll design is another main feature of the present invention.During shaping,, suitably increase the chamfering R1 of tooth top side for the distortion that makes web and junction, the edge of a wing is tending towards evenly; Concentrate for preventing bigger stress, tooth flank also will have a chamfering R2.Concrete span is: R1=(1.5～2.5) f, R2=(0.5～1.2) f, f is the ripple height.
Roller curve is the decisive factor that influences product quality, also is directly connected to the success or failure of this technology.The principle of design roller curve is to guarantee format roll and web does not interfere, forming process is stablized, web thickness evenly reaches smooth surface.Otherwise, poor product quality even two phenomenons that roll blocks will appear, cause the damage of equipment.Roller curve provided by the present invention satisfies above-mentioned requirements fully.Roll shape (tooth top) curvilinear equation is
X（t）＝X1（t）cos2β+Y（t）sin2β+asinβ
Y（t）＝-X1（t）sin2β+Y1（t）cos2β+acosβ
X1, Y1 are the known parameters equation of tooth root curve about the O1X1Y1 coordinate system; X, Y are the parametric equation of tooth root curve about the O1X10Y10 coordinate system.T is a parameter, and C is a web thickness, and a is the centre-to-centre spacing of two rolls.Adopt CAD and manufacturing (CAD/CAM) technology, can make the processing of format roll reach very high precision.
Description of drawings of the present invention
Fig. 1 is the working state schematic representation of formingstand of the present invention.
Fig. 2 is the laterally relation curve between external applied load and web lateral displacement during pressurized of H section steel beam (antinode and straight abdomen).
Fig. 3 is the H section steel beam that has ripple with the web middle part of welding production.
Fig. 4 is a hot rolling plastron h-shape steel of the whole ripple beam.
Fig. 5 is the section configuration after vertically cutting along web.
Fig. 6 is the used format roll collars of the present invention.
Fig. 7 is the used coordinate system of roller curve equation.F, F among the figure
6Be that top roll tooth root curve is respectively in O1X10Y10 and two coordinate systems of O1X1Y1; G, G
βBe that the lower roll tip curve is respectively in O2X0Y10 and two coordinate systems of O2X2Y2.
Referring to accompanying drawing 1,4 and 6 and, can understand the present invention better in conjunction with the following examples.
Embodiment carries out on three frame H continuous section rolling units.First is breakdown stand, and second is edger mill, and the 3rd is planishing stand.For rolling H-shaped steel beam with corrugated web, changed the horizontal roller of planishing stand into format roll, edger roll remains unchanged.The tip diameter of format roll (1) is 278mm, and barrel length is 71mm, and the side chamfering of tooth top and tooth root is respectively R1=7mm, R2=2mm, and rolling temperature is 1050 ℃.At first enter breakdown stand after straight abdomen H type hot rolling base goes out heating furnace, enter edger mill then, enter planishing stand at last and once roll into and be H-shaped steel beam with corrugated web.At finishing pass, the reduction ratio of web (3) is 7%, and the reduction ratio of the edge of a wing (4) is 10%.Product size is: flange width B=60mm, thickness d=4.5mm; Web height h=71mm, thickness C=3mm, ripple height f=3.5mm, corrugation length l=18mm.The sample surfaces that is rolled is bright and clean, thickness is even, web is connected the flaw detection of doing in the place shows that this part does not have any defective with the edge of a wing.
Compared with prior art, the invention provides the Processes and apparatus of producing the hot rolling Ripple Sternum in enormous quantities, characteristics in light weight, good mechanical performance that its product has.Replace the straight abdomen H of common hot rolling section steel beam with this product, can save metal 10～13%, remarkable in economical benefits.
Claims (7)
1, the hot rolling technology of H-shaped steel beam with corrugated web, adopt the tandem rolling unit of production ordinary straight abdomen H section steel beam, it is characterized in that having changed the horizontal roller of last planishing stand of tandem rolling unit into format roll with specific roller curve, under the hot-rolled temperature and suitable reduction system of regulation, be that the hot rolling base of straight abdomen H type once rolls into and is Ripple Sternum with supplied materials.
2,, it is characterized in that the curvilinear equation of format roll (tooth top) is according to the hot rolling technology of the Ripple Sternum described in the claim 1
3,, it is characterized in that the tooth top of format roll and the side chamfering of tooth root are respectively: R1=(1.5～2.5) f, R2=(0.5～1.2 according to the hot rolling technology of the Ripple Sternum described in claim 1 or 2) f.
4,, it is characterized in that rolling temperature is 900～1200 ℃ according to the hot rolling technology of the Ripple Sternum described in the claim 1.
5, according to the hot rolling technology of the Ripple Sternum described in the claim 1, it is characterized in that the reduction ratio on the web and the edge of a wing is respectively: ε 1=5～10%, ε 2=ε 1+1～5%.
6,, it is characterized in that vertically having horizontal cycle ripple along whole web according to the Ripple Sternum described in the claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86106315.5A CN1005689B (en) | 1986-09-19 | 1986-09-19 | Hot rolling process for h-shaped steel beam with corrugated web |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86106315.5A CN1005689B (en) | 1986-09-19 | 1986-09-19 | Hot rolling process for h-shaped steel beam with corrugated web |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86106315A CN86106315A (en) | 1988-03-30 |
| CN1005689B true CN1005689B (en) | 1989-11-08 |
Family
ID=4803153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86106315.5A Expired CN1005689B (en) | 1986-09-19 | 1986-09-19 | Hot rolling process for h-shaped steel beam with corrugated web |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1005689B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057105C (en) * | 1994-08-15 | 2000-10-04 | 奇美实业股份有限公司 | High luster impact-resistance excellent processing fluidity styrene series resin composition |
| CN102784829A (en) * | 2012-08-17 | 2012-11-21 | 湖北弘毅钢结构工程有限公司 | Adjustable molding equipment for H-steel corrugated web plate |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704567A (en) * | 2011-03-28 | 2012-10-03 | 魏龙淮 | H-shaped steel structural part and production method thereof |
| CN103625551A (en) * | 2012-08-20 | 2014-03-12 | 武琳 | One-time roller forming I-beam |
-
1986
- 1986-09-19 CN CN86106315.5A patent/CN1005689B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057105C (en) * | 1994-08-15 | 2000-10-04 | 奇美实业股份有限公司 | High luster impact-resistance excellent processing fluidity styrene series resin composition |
| CN102784829A (en) * | 2012-08-17 | 2012-11-21 | 湖北弘毅钢结构工程有限公司 | Adjustable molding equipment for H-steel corrugated web plate |
| CN102784829B (en) * | 2012-08-17 | 2014-06-18 | 湖北弘毅钢结构工程有限公司 | Adjustable molding equipment for H-steel corrugated web plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN86106315A (en) | 1988-03-30 |
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