WO1997011796A1 - Procede pour laminer des barres deformees et cylindre pour barres deformees - Google Patents
Procede pour laminer des barres deformees et cylindre pour barres deformees Download PDFInfo
- Publication number
- WO1997011796A1 WO1997011796A1 PCT/JP1996/002783 JP9602783W WO9711796A1 WO 1997011796 A1 WO1997011796 A1 WO 1997011796A1 JP 9602783 W JP9602783 W JP 9602783W WO 9711796 A1 WO9711796 A1 WO 9711796A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- groove
- roll
- rolling
- circumferential
- cross
- Prior art date
Links
Classifications
-
- 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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/163—Rolling or cold-forming of concrete reinforcement bars or wire ; Rolls therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
-
- 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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
Definitions
- the present invention relates to a rolling method for obtaining a deformed steel bar used for reinforcing bars and the like, and in particular, to a method for stably obtaining a deformed steel having four ribs extending in a longitudinal direction by a two-roll rolling mill. , And the roles used in this method.
- Fig. 6 shows conventional deformed steel bars in general.
- (a) is a side view
- (b) is a cross-sectional view taken along line XX of (a).
- the deformed steel bar 5 is formed on the peripheral surface with a round bar at a number of convex portions (nodes) 12 along the circumferential direction or at substantially equal intervals in the longitudinal direction.
- two protrusions (ribs) along the longitudinal direction are formed at positions 180 ° apart in the circumferential direction of the four force cross section circle.
- FIGS. 7 and 8 finishing roll as shown in FIG. R,, R 2
- Fig. 7 is a front view showing the arrangement of both finishing rolls.
- Fig. 8 (a) is a development view of the mouth / periphery, and (b) is a cross-sectional view taken along the line Y-Y of (a). as it can be seen from the c of FIG diagrams, final finish for grooved formation to both finish low ⁇ , the R 2, over the entire circumferential direction, cross-sectional or semicircular circumferential groove 3 form Has been established.
- a nodal groove 2 orthogonal to the peripheral groove 3 is formed. Then, the material S, whose cross section is rolled into an ellipse by the upstream rolling mill train, is passed through a hole formed by the two finishing rolls R 1, R 2 to form a groove 2 on the peripheral surface of the round material. and clause 1 2 in accordance with the roll R, the material S, the ribs 4 caused by heading ⁇ from between R 2 is formed.
- the knots of the deformed steel bar are arranged at an angle to the longitudinal direction.
- the nodal groove of the finishing row R has a predetermined angle with respect to the circumferential direction. It is formed by tilting only the string.
- (a) is a developed view of the peripheral surface of the finishing roll R
- (b) is a cross-sectional view taken along the line Z-Z. In this case, too, only two ribs of the deformed steel bar are formed by squeezing out from between the finishing rolls R.
- deformed steel bars are bent by a processing machine. In such a case, if there are only two ribs, it is difficult to stably support the surface of the deformed bar with the feeder and supporting device of the processing machine. Therefore, a deformed steel bar having four ribs at almost equal intervals in the circumferential direction is required. Deformed bars are also used as reinforcing bars for reinforced concrete, but having four ribs also has the advantage of increasing the adhesion to concrete.
- the present invention has been made in view of such a point, and it is intended to obtain a deformed steel bar having a knot and four ribs by performing a final finishing rolling with a 2-roll rolling mill.
- the purpose is. Disclosure of the invention
- the method of rolling a deformed steel bar according to the present invention is a method of forming a knot and a rib on a surface of a material to be fed by a final finishing rolling mill of a hot continuous rolling facility in which a plurality of two-roll rolling mills are arranged in series.
- a circumferential groove having a substantially semicircular cross-section provided on the circumferential surface of the roll over the entire circumferential direction, and a nodal groove provided on the circumferential groove surface so as to intersect with the circumferential groove are provided.
- a bottom groove having a substantially trapezoidal cross-section and an opening width larger than the bottom width provided in the center of the circumferential groove in the groove width direction over the entire circumferential direction. It is characterized in that four ribs are formed by protrusion from the gap between the mouth and the bottom groove.
- two ribs are formed by the bottom groove formed on each roll, in addition to the two ribs formed by protrusion from between the rolls. Since the rib formed by the bottom groove is provided at the center of the circumferential groove in the groove width direction, a deformed steel bar having four ribs formed at equal or substantially equal intervals in the circumferential direction can be obtained.
- the roll is arranged so that the bottom surface of the bottom groove coincides with the bottom surface of the node groove 2 and the node groove 2 and the peripheral groove 3 are orthogonal to each other.
- rolling conditions are set so that the width H, between the protruding ribs 4a, 4b, or the diameter A, of the cross-sectional circle of the nodal groove 2, is set. Is preferably performed.
- the outer peripheral surfaces of all the ribs coincide with or almost coincide with the outer peripheral surfaces of the nodes.
- the nodes are formed at right angles to the ribs.
- the depth of the bottom groove 1 is not more than 10% of the average diameter of the product, and the bottom groove 1 has a substantially equilateral trapezoidal shape in cross section.
- the angle between two sides that are not rows is 10 ° or more and the bottom width of the bottom groove 1
- the average diameter is preferably 4% or more.
- the above-mentioned substantially trapezoidal shape and substantially isosceles trapezoidal shape means that the parallel sides of the trapezoid (not including the parallelogram) and the isosceles trapezoid are not exactly straight lines but concentric arcs. Show the shape. The shorter one of these arcs forms the bottom surface of the bottom groove, and the longer one forms the opening. Further, the average diameter of the product means an average diameter of a round bar portion excluding nodes and ribs of the deformed bar. - Here, as shown in FIG.
- the present invention also relates to a cross section provided over the entire circumferential direction on the low circumferential surface. ffl, each semicircular peripheral groove, a nodal groove provided on the peripheral groove surface so as to intersect with the peripheral groove, and a cutout provided over the entire circumferential direction at the center of the peripheral groove in the groove width direction.
- the present invention provides a roll for rolling a deformed steel bar having a surface having a substantially groove shape and a bottom groove having an opening width larger than the bottom width.
- the roll for deformed steel bar rolling wherein the bottom surface of the bottom groove and the bottom surface of the joint groove coincide with each other, and the joint groove and the circumferential groove are preferably arranged so as to be orthogonal to each other.
- the depth of the bottom groove is 10 times the average diameter of the product.
- the bottom groove has a substantially isosceles trapezoidal cross section and is not parallel to the bottom groove, the two-sided t angle is 10 ° or more, and the bottom width of the bottom groove is the average diameter 4. More preferably above.
- FIG. 1 is a view showing a preferred roll of a two-roll rolling mill for final finishing according to the present invention. Is equivalent to
- FIG. 2 is a front view showing a roll arrangement of a final finishing ffl two-roll mill in which a preferred method of the present invention is carried out.
- FIG. 3 is a graph for explaining the operation of the present invention.
- FIG. 4 is a front view showing a roll die of a two-roll rolling mill for final finishing in one embodiment of the present invention.
- FIG. 5 is a view showing a state in the feed roller of the deformed bar obtained in one embodiment of the present invention, wherein (a) to (c) show different states.
- FIG. 6 is a view showing an example of a conventional deformed steel bar, in which (a) is a side view and (b) is a cross-sectional view taken along the line XX.
- FIG. 7 shows the final finishing ffl 2-roll rolling mill to obtain the deformed steel bar shown in Fig. 6.
- FIG. 2 is a schematic diagram showing a roll arrangement.
- FIG. 8 is a developed view (a) showing the roll of FIG. 7 and a cross-sectional view taken along the line Y-Y (b).
- Fig. 9 is a diagram showing the rolls of a two-roll mill for final finishing used in conventional deformed steel bar rolling.
- (A) is a developed view of the roll surface, and (b) is the Z-of (a). This corresponds to a sectional view taken along line Z.
- FIG. 1 is a view showing a roll of a two-roll rolling mill for final finishing used in this embodiment.
- (A) is a development view of a roll peripheral surface, and
- (b) is a D-D line of (a). It corresponds to a sectional view.
- FIG. 4 is a front view showing a roll hole of a two-roll rolling mill for final finishing formed by the rolls of FIG. 1 in this embodiment.
- a circumferential groove 3 having a substantially semicircular cross section is formed on the roll circumferential surface over the entire circumferential direction.
- the circumferential groove 3 is provided with a center di in the groove width direction of the circumferential groove 3.
- a nodal groove 2 of a predetermined width is cut so as to be orthogonal to.
- the nodal grooves 2 are formed at equal intervals along the circumferential direction of the circumferential groove 3 (that is, the center line L in the groove width direction).
- a bottom groove 1 having a substantially trapezoidal cross section and a width larger than the opening width or the bottom width is formed at the center of the groove 3 in the groove width direction over the entire circumference in the circumferential direction.
- the bottom surface of 1 coincides with the bottom surface of the nodal groove 2.
- the depth c of the bottom groove 1 and the nodal groove 2 is 0.85 mm, and the hole is straight.
- the average of the product ⁇ 2 is 15.9 mm.
- the angle 0 between the two non-parallel sides is 60 °, and the bottom width b of the bottom groove 1 is 2. ⁇ mm.
- the roll R, the inclined portion 3 a is made form a boundary portion between the circumferential groove 3 of the R 2 peripheral surface.
- Roll gap d is set to 2. Omm, both openings Ichiru 13 ⁇ 4,, the angle formed by the inclined portion 3 a each other R 2 is 6 0.
- the depth c of the bottom groove 1 5.
- the groove width b of the bottom side of the bottom groove 1 corresponds respectively to 1 to 3% of the average diameter A 2 of the product.
- Such a two-roll rolling mill was installed as a final finishing mill, and a round bar material rolled to a predetermined outer diameter by a normal two-piece rolling mill row was finish-rolled.
- the width H of the ribs 4a and 4b due to the protrusion of the material S exiting the final finishing mill is the diameter A of the cross-sectional circle of the nodal groove 2.
- the gap between the mouths of the rolling mill arranged immediately before the final finishing mill was adjusted so as to conform to the above.
- the obtained deformed steel bar 5 can be rotated by the feed roller 6 ⁇ which is a feeder of the processing machine, and the groove surface of the feed roller 6 can be obtained. At least one rib 4 always hits 6a. Therefore, the deformed steel bar 5 is reliably supported by the feed roller 6 and accurately sent.
- the depth c of the bottom groove 1 5.
- the groove width of the bottom side of the bottom groove 1 b is 1 average diameter A 2 of the product 3?
- the method of the present invention by performing the final finish rolling with a two-roll rolling mill, a deformed steel bar having a node and four ribs can be stably obtained. As a result, it is possible to obtain a four-ribbed deformed steel bar simply by changing the rolling configuration of the conventional two-rib deformed steel bar to produce the final finished ffl 2 low rolling mill. . Therefore, the method and the roll of the present invention are suitably used as a method for producing a deformed steel bar having four ribs at low cost and as a roll therefor.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Metal Rolling (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU70958/96A AU710014B2 (en) | 1995-09-28 | 1996-09-26 | Method of rolling deformed bar and roll for deformed bar |
EP96931999A EP0853988A4 (en) | 1995-09-28 | 1996-09-26 | PROCESS FOR LAMINATING DEFORMED BARS AND CYLINDER FOR DEFORMED BARS |
BR9610698A BR9610698A (pt) | 1995-09-28 | 1996-09-26 | Método de laminação de um vergalhão para reforço de concreto e cilindro para o vergalhão para reforço de concreto |
KR1019980702191A KR19990063724A (ko) | 1995-09-28 | 1996-09-26 | 이형봉강의 압연방법 및 이형봉강용 로울 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7251356A JP2957450B2 (ja) | 1995-09-28 | 1995-09-28 | 異形棒鋼の圧延方法 |
JP7/251356 | 1995-09-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997011796A1 true WO1997011796A1 (fr) | 1997-04-03 |
Family
ID=17221617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1996/002783 WO1997011796A1 (fr) | 1995-09-28 | 1996-09-26 | Procede pour laminer des barres deformees et cylindre pour barres deformees |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0853988A4 (ja) |
JP (1) | JP2957450B2 (ja) |
KR (1) | KR19990063724A (ja) |
CN (1) | CN1198111A (ja) |
AU (1) | AU710014B2 (ja) |
BR (1) | BR9610698A (ja) |
TW (1) | TW305778B (ja) |
WO (1) | WO1997011796A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109396180A (zh) * | 2018-10-29 | 2019-03-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | 一种sd420w竹节钢筋的生产方法 |
CN111215448A (zh) * | 2019-03-13 | 2020-06-02 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | 一种带肋钢筋的生产系统、生产方法以及带肋钢筋 |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100363120C (zh) * | 2004-11-22 | 2008-01-23 | 董重光 | 钢筋搓轧机 |
CN2817999Y (zh) * | 2005-07-18 | 2006-09-20 | 罗树森 | 连续轧制斧头或锤头异型材的专用轧机 |
KR100838624B1 (ko) * | 2007-01-26 | 2008-06-16 | 신수정 | 전기유도가열을 이용한 이형봉강의 열간압연 방법 |
JP2012223802A (ja) * | 2011-04-21 | 2012-11-15 | Otani Steel Corporation Inc | 異形棒鋼、及びその圧延方法 |
KR200470061Y1 (ko) * | 2012-04-05 | 2013-11-25 | 동국제강주식회사 | 타원형 압연 가이드 롤러 및 그를 갖는 압연 장치 |
ES2878019T3 (es) * | 2013-09-10 | 2021-11-18 | Augma Biomaterials Ltd | Aplicador de componente doble |
JP6281515B2 (ja) * | 2015-03-26 | 2018-02-21 | Jfeスチール株式会社 | 異形棒鋼の圧延方法 |
CN105436233A (zh) * | 2015-12-16 | 2016-03-30 | 重庆麦拓科技有限公司 | 一种冷轧钢筋加工工艺 |
CN106269853A (zh) * | 2016-08-16 | 2017-01-04 | 重庆市晟庄建材有限责任公司 | 一种高延性冷轧带肋钢筋加工方法 |
JP7309581B2 (ja) * | 2019-11-20 | 2023-07-18 | Jfe条鋼株式会社 | 偏径差のばらつきを低減した異形鉄筋の製造方法および製造装置 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH043700Y2 (ja) * | 1986-03-04 | 1992-02-05 |
-
1995
- 1995-09-28 JP JP7251356A patent/JP2957450B2/ja not_active Expired - Lifetime
-
1996
- 1996-09-26 KR KR1019980702191A patent/KR19990063724A/ko not_active Application Discontinuation
- 1996-09-26 BR BR9610698A patent/BR9610698A/pt not_active Application Discontinuation
- 1996-09-26 AU AU70958/96A patent/AU710014B2/en not_active Ceased
- 1996-09-26 CN CN96197278A patent/CN1198111A/zh active Pending
- 1996-09-26 EP EP96931999A patent/EP0853988A4/en not_active Withdrawn
- 1996-09-26 WO PCT/JP1996/002783 patent/WO1997011796A1/ja not_active Application Discontinuation
- 1996-10-02 TW TW085112024A patent/TW305778B/zh active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH043700Y2 (ja) * | 1986-03-04 | 1992-02-05 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0853988A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109396180A (zh) * | 2018-10-29 | 2019-03-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | 一种sd420w竹节钢筋的生产方法 |
CN109396180B (zh) * | 2018-10-29 | 2020-09-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | 一种sd420w竹节钢筋的生产方法 |
CN111215448A (zh) * | 2019-03-13 | 2020-06-02 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | 一种带肋钢筋的生产系统、生产方法以及带肋钢筋 |
Also Published As
Publication number | Publication date |
---|---|
TW305778B (ja) | 1997-05-21 |
KR19990063724A (ko) | 1999-07-26 |
EP0853988A4 (en) | 2001-06-06 |
AU710014B2 (en) | 1999-09-09 |
JP2957450B2 (ja) | 1999-10-04 |
JPH0994602A (ja) | 1997-04-08 |
CN1198111A (zh) | 1998-11-04 |
AU7095896A (en) | 1997-04-17 |
EP0853988A1 (en) | 1998-07-22 |
BR9610698A (pt) | 1999-07-06 |
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