CN1239172A - Processing method and connection structure of joint end of reinforced special and steel for concrete - Google Patents

Processing method and connection structure of joint end of reinforced special and steel for concrete Download PDF

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Publication number
CN1239172A
CN1239172A CN99104528A CN99104528A CN1239172A CN 1239172 A CN1239172 A CN 1239172A CN 99104528 A CN99104528 A CN 99104528A CN 99104528 A CN99104528 A CN 99104528A CN 1239172 A CN1239172 A CN 1239172A
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China
Prior art keywords
deformed bar
concrete
diameter
connection end
upsetting
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CN99104528A
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Chinese (zh)
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郑京钰
柳忠基
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
    • E04C5/165—Coaxial connection by means of sleeves
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Forging (AREA)

Abstract

With an object of providing a method of working a connection end portion of deformed bar for reinforcing concrete and a connection structure, comprising: swaging at least a connection end portion at normal temperature and forming a rolled thread portion at an outer peripheral face of the connection end portion of the deformed bar subjected to the swaging step in which at least one connection end portion is swaged at a normal temperature such that a maximum diameter of the connection end portion is equal to or slightly larger than a diameter of a cylindrical body of the deformed bar or slightly smaller than a diameter of the deformed bar depending on a degree of working; and a rolling step of forming a thread portion having a diameter substantially equal to a swaging diameter at an outer peripheral face of the connection end portion of the deformed bar which has been subjected to the swaging step.

Description

Concrete strengthens deformed bar link section production method and syndeton
The present invention relates to a kind of form in building, building building site construction thing framework, strengthen with deformed bar and connect the processing method of end thread and the deformed bar that processes by this method and the syndeton of deformed bar.
Generally in building and building building site, with concrete strengthen erect basic framework with deformed bar after, by water, the health concrete builds up the construction thing.At this, alleged deformed bar is surperficial bossed deformed bar, and the projection of axis direction is called " reinforcing rib ", and the projection beyond the axis is called " joint ".
And, make aforementioned concrete and strengthen when using deformed bar, be to provide with the length of cutting off regulation, be according to the size of construction thing, the cut-out concrete strengthens with deformed bar and interconnects, and makes it to cut into necessary length.
In addition, when interconnecting, used with the connection end of each deformed bar overlapping after, with the locking means of iron wire ligation.
But the overlapping use in connection end with each deformed bar has high material consumption, with because of being connected deformed bar with iron wire, the coupling part dies down as time passes, connects the problem that the labour cost of operation strengthens simultaneously.
In addition, the reinforcing bar that is connected by locking means is after concrete plaster pouring health finishes, the characteristic that comes from the bar construction that begins to be connected with concrete adhesive power is brought into play, but structure can not present fragile architectural characteristic under contingency concrete plaster or health generation problem condition.
As the method that solves such problem, proposed a kind of as the hot upset diameter method mechanical connection method, that connect the end.This method is after heating connects the end, towards the axial reinforcing of deformed bar, makes the method for aforementioned connection end upset diameter.
But this method also can cause spillage of material owing to still shortened the length of deformed bar.
In addition, be spot heating owing to connect the end, heat affecting part and the variation of not having between the influence part that is connected end piece material tissue can finally make elongation per unit length descend, and be not shock-resistant, because the part heating presents irregular Tissue distribution problem.
Developed and aforementioned different cold working method for addressing this problem.
Just, this method is, at normal temperatures, along deformed bar axially, apply big pressure and make and connect end upset diameter (Fig. 5) connecting the end.Proposed connecting the 1st method that the end forms screw cutting portion and removed slag and form the 2nd method of rolled threaded portion after (SKIM) machining in the end that is connected of upset diameter.
Wherein, the 1st method is by the テ Network ニ プ Le エ ス ア of France exploitation, Korean Patent announce 94-8311 number and No. the 5158527th, corresponding with it United States Patent (USP) open, the 2nd method is by Britain CCL exploitation, by BP 2286782A openly.
Yet because of work hardening, it is very high that hot strength and hardness become, the problem that has the impact absorption energy value sharply to descend by the deformed bar of aforementioned upset diameter method (UPSETTING METHOD) processing.
In addition, as the metallographic (Fig. 6 A and 6B) of the connection end behind the deformed bar upset diameter is compared with the metallographic (Fig. 7 A and 7B) of element spare, Fig. 6 A and Fig. 7 A illustrate the axial metallographic along upset diameter and element spare respectively, clearly, bainite among Fig. 7 A (パ-ラ イ ト) and pearlitic structrure are towards axial lengthening and be to carry out continuously, otherwise metallographic has interrupted in axial continuity among Fig. 6 A.
In addition, Fig. 6 B and Fig. 7 B illustrate respectively along the axial tissue perpendicular to upset diameter and element spare, and clearly, in the element spare of Fig. 7 B, pearlite and oblique Ju Shi soma are equally distributed, otherwise in the upset diameter portion of Fig. 6 B, metallographic is alligatoring considerably.The formation of the tissue of upset diameter portion is inhomogeneous like this, obviously.
The purpose of this invention is to provide a kind of concrete that solves foregoing problems strengthens with deformed bar and connects the Screw thread process method of end and the syndeton of the deformed bar that processed by this method.
Another object of the present invention provides a kind ofly need not carry out machining, and the concrete that can keep the intrinsic fibr tissue of deformed bar strengthens with deformed bar and connects the processing method of end and the syndeton of the deformed bar that obtains with this method.
Another purpose of the present invention provides a kind of owing to strengthen with deformed bar without the indeclinable concrete of heat tissue and to connect the processing method of end and the syndeton of the deformed bar that obtains with this method.
A further object of the present invention provides a kind of owing to do not make and connect the end upset diameter, can compensate the syndeton that the concrete that dies down because of work hardening tissue strengthens the deformed bar of processing with deformed bar link section production method with by this method.
For achieving the above object, the feature that concrete of the present invention strengthens with the processing method of deformed bar connection end comprises, strengthen with in the deformed bar at concrete, the concrete that will have reinforcing rib and a plurality of joints strengthens and to be connected end upsetting at normal temperatures with at least one deformed bar in the deformed bar, and the diameter of the maximum gauge that makes described connection end and the cylinder of described deformed bar is identical, big slightly or by processing the generation step slightly littler than the diameter of deformed bar; And
Go out the step of the threaded portion that is as the criterion with upset diameter through roll forming on the outer peripheral face of at least one connection end described upsetting step, deformed bar.
In addition, concrete enhancing of the present invention is characterized as with deformed bar, and at least one connects end upsetting at normal temperatures, forms squeezing thread portion on the outer peripheral face of a connection end of the deformed bar of the described upsetting step of process.
In addition, concrete of the present invention strengthens being characterized as with the syndeton of deformed bar, at least one connects end upsetting at normal temperatures, uses the hookup connection that has corresponding to the screw thread of described rolled threaded form through the deformed bar that forms squeezing thread portion on the outer peripheral face of described upsetting step.
Brief description
Figure 1A-1E illustrates concrete of the present invention and strengthens the stage diagram that connects the processing method of end with deformed bar,
Fig. 2 is the enlarged drawing of Fig. 1 E threaded portion,
Fig. 2 A and Fig. 2 B illustrate preferable threaded portion aspect graph,
Fig. 3 A connects the axial metallograph in end along the present invention,
Fig. 3 B is along perpendicular to the axial metallograph in connection of the present invention end,
Fig. 4 is the state diagram that is connected deformed bar of the present invention by hookup,
Fig. 5 is that conventional art, concrete strengthen connection end upset diameter (UPSETTING) state diagram with deformed bar,
Fig. 6 A connects the axial metallograph of end along Fig. 5,
Fig. 6 B is along the metallograph vertically that connects the end perpendicular to Fig. 5,
Fig. 7 A is the metallograph vertically along the present invention and the employed element spare of conventional art,
Fig. 7 B is along the axial metallograph perpendicular to the present invention and the employed element spare of conventional art,
Fig. 8 A illustrates elevation and the lateral view of concrete enhancing with the forging die that is connected end upsetting state of deformed bar with 8B.
Embodiment
Below, illustrate in greater detail preferred embodiment of the present invention with reference to accompanying drawing.
Figure 1A shows the concrete enhancing deformed bar before the processing, and concrete strengthens the reinforcing rib (20) and the joint (30) that by cylinder (10), equally spaced are formed on its outer peripheral face with deformed bar (100) and constitutes.
So shown in Figure 1A, it connects end (40), and the pars intermedia of deformed bar can be crooked relatively usually for this profiled, elongated bar steel.
In addition, Figure 1B illustrates the upsetting operation, insert the upsetting forging die (Fig. 8 A is an elevation, and Fig. 8 B is a lateral view) that 2 above sheet spares or roller constitute after, apply fluid power or mechanical force, carry out upsetting at normal temperatures.
In addition, make the reinforcing rib (30) of the connection end (40) shown in Figure 1A and the diameter crimping of joint (20) become identical with the diameter (11) of the cylinder of deformed bar (100).
Like this, make the axle (19) of cylinder (10) concentric with the axle (59) of upsetting portion (50).By this operation, can directly process the ledge of deformity of reinforcing rib (20) (30) or the deformity of reinforcing bar bar steel.
Afterwards, as Fig. 1 C, equally by the upsetting operation, the section of the connection end (50) that cutting is outstanding, positive cutting and chamfered edge (Facing and Chamfering) processing make section (53) smooth, and the chamfered edge operation is carried out in the neighboring (55) of section (53).
Fig. 1 E illustrates the state diagram of the deformed bar state after the processing end of job.
Like this, when deformed bar is handled,, improved the fastening force of deformed bar owing to suppressed the damage of screw thread in the corner angle.
In addition, on the outer peripheral face of aforementioned upsetting portion (50), carry out the rolling processing same, to form threaded portion (60) with Fig. 1 E.
It is identical or big slightly with the diameter of cylinder (10) that the external diameter (61) of aforementioned upsetting portion (60) becomes.
Thus, the metallographic of threaded portion of the present invention blank is not cut off, and the mechanical strength of the threaded portion of plastic working is improved, and in the time of the metallographic densification, intrinsic tissue is then kept in the inside of connecting portion, thereby can anti-big load and impact yet.
Fig. 3 A illustrates the photograph that deformed bar of the present invention is connected the tissue of end with Fig. 3 B, but Fig. 3 A illustrates along the axial metallographic of deformed bar, further present the continuity of pearlite shown in Fig. 7 A and oblique Ju Shi soma, clearly it is organized and also becomes dense.
In addition, Fig. 3 B illustrates along perpendicular to the axial metallographic of deformed bar, presents denser than pearlite shown in Fig. 7 B and bainite structure.
Yet the processing of aforementioned threads portion can be the processing of the various screw threads of round thread or angular thread etc., preferably, and round thread processing.
For example, can process the screw thread shown in Fig. 2 A and Fig. 2 B.
Reason is, adds man-hour with round thread, because of the section of ridge is circle, the structure as the tooth root part thickening of trapezoidal thread, strengthened resistance, the otch phenomenon can not take place, much less in its result, fastening force has strengthened, in many building site such as dust or sandstone, and also can be fastening easily.
In addition, as the pitch of aforementioned circle screw thread is made than little, fastening force and intensity are improved, and much less, get loose even also need not worry when big vibration takes place.
In addition, from the threaded portion (60) of roll forming, strengthen the ditch diameter (63) of the ridge of boundary line (65) gradually as Fig. 2, wherein, boundary line is and aforementioned reinforcing rib (30) and joint (20) adjacent line, thereby can suppresses the stress concentration phenomenon.
In addition, Figure 1A illustrates the concrete that forms reinforcing rib (30) and joint (20) to be strengthened with deformed bar (100), but the present invention is not limited to this, can be applicable to that also the concrete enhancing has the reinforcing rib that forms oblique line or X line with deformed bar.
Fig. 4 illustrates the method for the concrete irregular bar steel connection that aforesaid way is formed, but, for the roll forming threaded joints (60) that will be formed at each deformed bar (100) connection end (40) connects, adopted (Fig. 4 B that possesses the threaded portion, hookup 4C) (200), described threaded portion is corresponding with the shape of aforementioned roll forming threaded portion (60).
As above-mentioned, adopt the present invention, need not destroy the concrete that uses in building, the building building site and strengthen the reinforcing bar tissue of using the deformed bar connecting portion, just can process, and can improve the mechanical strength of this connecting portion.
And owing to can form connecting portion in upsetting forging die and rolling processing, this processing is very easy to carry out, and can also reduce manufacturing cost thereupon.Particularly add man-hour with round thread, easily fastening and connection operation is very easy to, construction period can also reduce cost when shortening, the syndeton of the deformed bar made from upset diameter mode is in the past compared, because it is constant that the length of deformed bar is kept former state, has the advantage that can save about 1-2% material.

Claims (8)

1. a concrete strengthens the processing method that connects the end with deformed bar, it is characterized in that, comprises the following steps:
Strengthen with in the cylinder of deformed bar at concrete, the concrete enhancing that will have reinforcing rib and a plurality of joints is connected end upsetting at normal temperatures with at least one deformed bar in the deformed bar, makes the maximum gauge of described connection end identical, big slightly or slightly littler than the diameter of deformed bar by the processing generation with the diameter of the cylinder of described deformed bar;
Go out the threaded portion that is as the criterion with upset diameter through roll forming on the outer peripheral face of at least one connection end described upsetting step, deformed bar.
2. according to the described processing method of claim 1, it is characterized in that the axle of the connection end of the deformed bar of the described upsetting step of process and the axle coaxial arrangement of the cylinder of the deformed bar that forms described reinforcing rib and joint.
3. according to the described processing method of claim 1, it is characterized in that also having to carry out the step of section cutting and chamfered edge machining through the side end face of the connection end of the deformed bar of upsetting step.
4. according to the described processing method of claim 1, it is characterized in that described roll forming step makes in the threaded portion of described roll forming the ditch diameter with the ridge of the boundary line of described reinforcing rib and joint adjacency strengthen gradually.
5. a concrete strengthens and uses deformed bar, it is characterized in that, strengthen with in the cylinder of deformed bar at concrete, concrete with reinforcing rib and a plurality of joints strengthens with in the deformed bar, at least one connects end upsetting at normal temperatures, and one of the deformed bar of the described upsetting step of process connects the end and forms rolled threaded portion.
6. strengthen according to the described concrete of claim 5 and use deformed bar, it is characterized in that the maximum gauge of the connection end of described upsetting and the diameter of described cylinder are roughly the same.
7. strengthen according to the described concrete of claim 5 and use deformed bar, it is characterized in that, the external diameter of described roll forming threaded portion forms identical or is a bit larger tham the diameter of the cylinder of described deformed bar.
8. strengthen according to the described concrete of claim 5 and use deformed bar, it is characterized in that, the ditch diameter of the ridge of boundary line in the described roll forming threaded portion, the described reinforcing rib of adjacency and joint strengthens gradually.
CN99104528A 1998-03-31 1999-03-31 Processing method and connection structure of joint end of reinforced special and steel for concrete Pending CN1239172A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR11278/98 1998-03-31
KR19980011278 1998-03-31
CA002268878A CA2268878C (en) 1998-03-31 1999-04-13 Method of working connection end of deformed bar for reinforcing concrete, deformed bar worked by the method and structure deformed bar
TW088109033A TW440482B (en) 1998-03-31 1999-06-01 Manufacture method for concrete-strengthening deformed reinforcement bar and its connecting ends

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CN1239172A true CN1239172A (en) 1999-12-22

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EP (1) EP0947642B1 (en)
JP (1) JPH11342448A (en)
KR (1) KR100248963B1 (en)
CN (1) CN1239172A (en)
AU (1) AU2257499A (en)
CA (1) CA2268878C (en)
TW (1) TW440482B (en)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN100509264C (en) * 2003-06-25 2009-07-08 爱瑞柯国际公司 Deformed reinforcing bar splice and method
CN101618509B (en) * 2009-07-30 2010-09-29 廊坊凯博建设机械科技有限公司 Equipment and method for processing steel reinforced bar threads
CN108797894A (en) * 2017-04-26 2018-11-13 株式会社小野工业所 Reinforcing bar
CN109563706A (en) * 2016-10-13 2019-04-02 福田章 The screw-type splice construction and its manufacturing method of deformed bar
CN110202689A (en) * 2019-07-08 2019-09-06 湖北思泽新能源科技有限公司 A kind of hydraulic tongs connecting reinforcing bar

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KR100515204B1 (en) * 1998-04-13 2005-11-21 신우산업 주식회사 Connection structure of reinforcing bar for concrete reinforcement and processing method of the connection
WO2000047349A1 (en) * 1999-02-12 2000-08-17 Industrial Rollformers Pty. Ltd. Method for externally threading a deformed bar
AU757918B2 (en) * 1999-02-12 2003-03-13 Industrial Rollformers Pty Ltd Method for externally threading a deformed bar
EP1048798B1 (en) * 1999-04-22 2001-10-24 Ancotech Ag Method for manufacturing externally threaded reinforcing bars
EP1154092A1 (en) * 2000-05-09 2001-11-14 Schöck Enwicklungsgesellschaft mbH Sleeve connection for reinforcing bars
KR20020065969A (en) * 2001-02-08 2002-08-14 김순분 Machining method of a screw for a reinforcement bar
KR100449977B1 (en) * 2002-04-04 2004-10-01 김광희 Connecting structure of reinforced bar for reinforced concreate
US7624556B2 (en) * 2003-11-25 2009-12-01 Bbv Vorspanntechnik Gmbh Threaded deformed reinforcing bar and method for making the bar
ES2238930B1 (en) * 2004-02-20 2007-05-16 Compañia Española De Laminacion, S.L. BAR FOR CONCRETE CONCRETE.
SG155801A1 (en) * 2008-03-24 2009-10-29 Chua Bong Sai Method for working a thread on deformed reinforcing bar
FR2952840B1 (en) * 2009-11-26 2013-08-02 Edgard Henri Gerard Albert Thirion ARMATURE BONDING DEVICE AND METHOD FOR MANUFACTURING THE SAME
WO2012029079A2 (en) * 2010-09-03 2012-03-08 Gaurav Malhotra Reinforcing bar coupling and method
JP5420712B2 (en) * 2012-04-19 2014-02-19 株式会社トーカイ Deformed bar threaded rebar joint and its threaded deformed bar
CN104060770B (en) * 2013-03-22 2016-03-30 中冶建筑研究总院有限公司 Steel concrete supporting method
DE102013208413B4 (en) * 2013-05-07 2019-10-10 Badische Stahlwerke Gmbh Reinforcing steel, production method for reinforcing steel
CN105013984B (en) * 2014-04-24 2017-06-13 郑州大学 Gathering stock high tensile steel wire and preparation method thereof
CN104191177B (en) * 2014-08-25 2016-06-29 苏州第五建筑集团有限公司 A kind of hot pier straight thread reinforced bar and process units thereof and production technology
JP2016175092A (en) * 2015-03-19 2016-10-06 株式会社アキテック End screw processing method for reinforcing bar and end structure of reinforcing bar
CN104942006A (en) * 2015-06-25 2015-09-30 江苏永钢集团有限公司 Asymmetric ribbed shapes for threaded steel finished product grooves and production method thereof
CN105735566B (en) * 2016-04-01 2019-01-04 中国建筑第八工程局有限公司 The connection sleeve of finish rolling deformed bar
WO2023069008A1 (en) * 2021-10-18 2023-04-27 Angkasa Daehan Steel Pte. Ltd. Method for working a thread on a reinforcing bar for reinforcement of concrete

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Publication number Priority date Publication date Assignee Title
CN100509264C (en) * 2003-06-25 2009-07-08 爱瑞柯国际公司 Deformed reinforcing bar splice and method
CN101618509B (en) * 2009-07-30 2010-09-29 廊坊凯博建设机械科技有限公司 Equipment and method for processing steel reinforced bar threads
CN109563706A (en) * 2016-10-13 2019-04-02 福田章 The screw-type splice construction and its manufacturing method of deformed bar
US11274446B2 (en) 2016-10-13 2022-03-15 Akira Fukuda Screw-type rebar joint structure of deformed rebar and manufacturing method thereof
CN108797894A (en) * 2017-04-26 2018-11-13 株式会社小野工业所 Reinforcing bar
CN110202689A (en) * 2019-07-08 2019-09-06 湖北思泽新能源科技有限公司 A kind of hydraulic tongs connecting reinforcing bar
CN110202689B (en) * 2019-07-08 2020-06-23 湖北思泽新能源科技有限公司 Hydraulic pliers for connecting reinforcing steel bars

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KR19990076461A (en) 1999-10-15
CA2268878C (en) 2003-04-29
JPH11342448A (en) 1999-12-14
EP0947642A3 (en) 2000-01-12
CA2268878A1 (en) 2000-10-13
EP0947642A2 (en) 1999-10-06
AU2257499A (en) 1999-10-14
TW440482B (en) 2001-06-16
EP0947642B1 (en) 2006-05-31
KR100248963B1 (en) 2000-03-15

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