US3678721A - Method of rolling shaped steel members having flanges - Google Patents

Method of rolling shaped steel members having flanges Download PDF

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Publication number
US3678721A
US3678721A US881378A US3678721DA US3678721A US 3678721 A US3678721 A US 3678721A US 881378 A US881378 A US 881378A US 3678721D A US3678721D A US 3678721DA US 3678721 A US3678721 A US 3678721A
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United States
Prior art keywords
rolls
web
flange
horizontal
vertical
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Expired - Lifetime
Application number
US881378A
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English (en)
Inventor
Kanichi Kishikawa
Takeo Kuwata
Kentaro Kinoshita
Takao Tsuchiya
Yoshiro Kamogawa
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Nippon Steel Corp
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Nippon Steel Corp
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/088—H- or I-sections

Definitions

  • the present invention relates in general to a method of rolling shaped steel members having flanges, and more particularly to a method of rolling shaped steel members having flanges such as H-sectioned steel members and rails to be very accurately in size and shape by using the universal rolling mill.
  • the universal rolling mill of this kind is far advanced from that of the conventional rolling mill of the roll pass type in such respects as rolling technique, cost, and management or designing of the rolling passes.
  • the rolling method using the universal rolling mill is very important and indespensable in this field.
  • this method has such shortcomings that the steel members produced thereby are generally not accurate in size and shape, and there frequently occur defects near the crossing area of the flange and web of such members.
  • the object of the present invention is to provide a'method of rolling shaped steel members having flanges such'as H-sectioned steel members and rails by using the universal rolling mill, as an improvement of the conventional rolling method using the universal rolling mill, so that accuracy of the size and shape of the so rolled products can be raised, such improved method also being economical.
  • the method of the present invention is directed to the rolling of shaped steel members such as H-sectioned steel members and rails by a universal rolling mill having vertical rolls and horizontal rolls with their axes set on the same or nearly the same vertical section.
  • the biting point of the web of the material by the horizontal rolls of the universal rolling mill is made precedent to that of the flange by the vertical rolls. This is accomplished by adjusting the ratio between the diameters of the vertical rolls and the horizontal roll and/or the reduction schedule of each rolling pass.
  • FIGS. IA and B show the rolling of a H-sectioned steel member by a universal rolling mill of conventional type
  • FIG. IA shows the biting of the to-be-rolled material by the vertical rolls
  • FIG. 18 shows the biting of the to-be-rolled material by the horizontal rolls.
  • FIGS. 2A and B show the rolling operation by the conventional method
  • FIG. 2A shows the vertical section of such operation
  • FIG. 2B shows its plane figure.
  • FIGS. 3A and B show the rolling of a H-sectioned steel member by the universal rolling mill according to the present invention
  • FIG. 3A shows the biting of the to-be-rolled material by the vertical rolls
  • FIG. 3B shows the biting of the to-be-rolled material by the horizontal rolls.
  • FIG. 4 shows an explanatory diagram of the rolling operation of the horizontal rolls and the vertical rolls by the conventional method.
  • FIG. 5 shows an explanatory diagram of such operation according to the present invention.
  • FIG. 6 shows the friction power produced between each roll and the to-be-rolled material in operation.
  • FIG. 7 shows a histogram of the shifting of the web from the center in rolling a H-sectioned steel member by the universal rolling mill of conventional type.
  • FIG. 8 shows such histogram prepared on the same conditionsbut according to the present invention.
  • FIG. 9 shows the shifting of the web from the center in the direction of length of a H-sectioned steel member, in comparison between the case of rolling by the rolling mill of conventional type and the case of rolling by the rolling millof the present invention.
  • FIGS. IA and B show the relations between the tobe-rolled material and the vertical rolls of a universal rolling mill of conventional type and between the material and the horizontal rolls of the same rolling mill. In the rolling mill, all these rolls are arranged to be on the same vertical section, but, for convenience, the relation between the vertical rolls V and the tobe-rolled material and that between the horizontal rolls H and the material are separated, and shown respectively in FIG. IA andFIG. IB.
  • the contacting points of the vertical rolls V with the flange of the to-be-rolled material are in- I dicated with Y,Y,- and the contacting points of the horizontal rolls with the material are indicated with Y -Y
  • their projected contacting lengths are ldV and IdH.
  • IdV/ldH is about 1.51.
  • the product discharged from the rolling mill will have such section as shown in the right part of FIG, 4, with the center Z-Z of the web 2 having moved above the center Y- Y of the height of the flange 1. It is generally nearly impossible to set the rolls so that the upper surface of the roller table 4 set before or after the rolling mill is levelled with the center XX of the space between the upper horizontal roll H, and the lower horizontal roll H There have been developed some devices to make the roller table 4 movable up and down and adjust its height to the pass line as much as possible every time the to-be-rolled material passes. But when using such devices, the width of the flange l of the to-be-rolled material get slightly bigger as it passes the rolls, and it is very difficult to minutely adjust the height of the roller table to meet such growing width of the flange.
  • the method of the present invention is presented to solve these troubles, and is characterized by adjusting the ratio of diameters between the vertical roll and the horizontal roll and/or the schedule of each pass for the reduction of the flange and the web so that the biting of the web by the horizontal rolls is made at almost the same position as or in advance of the biting point of the flange by the vertical rolls.
  • FIG. 3 shows an embodiment of the present invention, wherein the diameter of the horizontal rolls H is made greater than that of the vertical rolls V so that the biting points Y,,- Y of the web 2 precede the biting points Y,-Y,-of the flange l and the ratio between their projected lengths in contact with the rolls is adjusted to be ldH IdV.
  • the diameter of the horizontal rolls H is made greater than that of the vertical rolls V so that the biting points Y,,- Y of the web 2 precede the biting points Y,-Y,-of the flange l and the ratio between their projected lengths in contact with the rolls is adjusted to be ldH IdV.
  • the biting points Y,,Y of the web 2 precede the biting points of the flange l; the web 2 of the to-be-rolled material is bitten by the horizontal rolls H, and H independently of the surface level of the roller table 4; the flange l forming one body with the web 2 is lifted up as it is in the original form and positioned rectangular against the axes of the horizontal rolls H, and H and then the flange l progresses into the space between the horizontal rolls H, and H and the vertical rolls V, thus the rolling operation starts. Therefore, after it has passed through said rolling mill, the material turns out to be a H-sectioned steel member having a uniform sectional shape. (See FIG. 5) The following is a description of the ratio of diameters of the rolls for use in the practice of the present invention. (See FlG. 3)
  • FIG. 7 shows the histogram of the shifting from the center of the web of a H-sectioned steel member having a 300 mm wide flange and a 300 mm high web by the universal rolling mill of conventional type.
  • FIG. 8 showing such histogram obtained by using the method of the present invention, proves that the shifting from the center of the web with the present method takes place about half as often as resulted from the use of the conventional method.
  • the vertical axis indicates the numbers N of H-sectioned members rolled on tests; and the horizontal axis indicates the numbers of those among the abovementioned of the so rolled members, in which shifting SW from the center of the web took place.
  • FlG FlG.
  • FIG. 9 shows that the irregularity in the distance so shifted in the lengthwise direction of the to-berolled material in the case of using the rolling mill of the present invention (A) is much less than that in the case of using the mill of conventional type (B).
  • the vertical axis indicates the shifting SW from the center of the web; and the horizontal axis indicates the positions of the top T, the middle M and the bottom B of the rolled material in the lengthwise direction LD.
  • a method for rolling shaped steel members having at least one flange such as H-sectioned steel members and rails by using a universal rolling mill having the axes of the vertical rolls and the horizontal rolls in the same vertical section comprising moving the to-be-rolled material through said universal rolling mill, causing said horizontal rolls to contact the web of said material prior to the point at which said vertical rolls contact said flanges of said material, and adjusting the ratio between diameters of said horizontal rolls and said vertical rolls to be greater than 3.2, whereby the reduction ratio of said flanges to said web is less than 1.6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
US881378A 1968-12-10 1969-12-02 Method of rolling shaped steel members having flanges Expired - Lifetime US3678721A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9042868 1968-12-10

Publications (1)

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US3678721A true US3678721A (en) 1972-07-25

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Application Number Title Priority Date Filing Date
US881378A Expired - Lifetime US3678721A (en) 1968-12-10 1969-12-02 Method of rolling shaped steel members having flanges

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Country Link
US (1) US3678721A (de)
CA (1) CA926160A (de)
DE (1) DE1960891B2 (de)
FR (1) FR2025808A1 (de)
GB (1) GB1292635A (de)
ZA (1) ZA698585B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968672A (en) * 1973-12-05 1976-07-13 Nippon Steel Corporation Method of rolling shaped steel members having flanges and apparatus therefor
JP2013075317A (ja) * 2011-09-30 2013-04-25 Nippon Steel & Sumitomo Metal Corp Ｈ形鋼の圧延方法および仕上ユニバーサル圧延機

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US395350A (en) * 1889-01-01 Apparatus for rerolling old rails
US1034361A (en) * 1904-03-23 1912-07-30 Henry Grey Rolling flanged metal beams or bars.
US1156986A (en) * 1914-08-14 1915-10-19 William A Dunn Rolling-mill.
US1163975A (en) * 1914-07-06 1915-12-14 John C Cromwell Universal mill.
US3165948A (en) * 1960-07-23 1965-01-19 Yawata Iron & Steel Co Method of rolling h-sectioned steel members and mill train for the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE16097E (en) * 1925-06-16 Rolling flanged metal beam xr--bar
GB191019634A (en) * 1910-08-22 1911-04-27 Charles Mcrae Grey Improvements in the Rolling of Flanged Metal Sections.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US395350A (en) * 1889-01-01 Apparatus for rerolling old rails
US1034361A (en) * 1904-03-23 1912-07-30 Henry Grey Rolling flanged metal beams or bars.
US1163975A (en) * 1914-07-06 1915-12-14 John C Cromwell Universal mill.
US1156986A (en) * 1914-08-14 1915-10-19 William A Dunn Rolling-mill.
US3165948A (en) * 1960-07-23 1965-01-19 Yawata Iron & Steel Co Method of rolling h-sectioned steel members and mill train for the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968672A (en) * 1973-12-05 1976-07-13 Nippon Steel Corporation Method of rolling shaped steel members having flanges and apparatus therefor
JP2013075317A (ja) * 2011-09-30 2013-04-25 Nippon Steel & Sumitomo Metal Corp Ｈ形鋼の圧延方法および仕上ユニバーサル圧延機

Also Published As

Publication number Publication date
DE1960891A1 (de) 1970-06-18
GB1292635A (en) 1972-10-11
CA926160A (en) 1973-05-15
ZA698585B (en) 1971-04-28
DE1960891B2 (de) 1975-08-21
FR2025808A1 (de) 1970-09-11

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