CN113374181A - Rod piece connecting system and connecting method thereof - Google Patents

Rod piece connecting system and connecting method thereof Download PDF

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Publication number
CN113374181A
CN113374181A CN202110697972.0A CN202110697972A CN113374181A CN 113374181 A CN113374181 A CN 113374181A CN 202110697972 A CN202110697972 A CN 202110697972A CN 113374181 A CN113374181 A CN 113374181A
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CN
China
Prior art keywords
sleeve
rod piece
anvil
extrusion
connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110697972.0A
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Chinese (zh)
Inventor
王旺兵
刘宇
贾云龙
邓涛
范亚峰
郭龙
何旭
张钦
左世斌
万永
董帅
张小连
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meishan CRRC Fastening System Co Ltd
Original Assignee
Meishan CRRC Fastening System Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meishan CRRC Fastening System Co Ltd filed Critical Meishan CRRC Fastening System Co Ltd
Priority to CN202110697972.0A priority Critical patent/CN113374181A/en
Publication of CN113374181A publication Critical patent/CN113374181A/en
Pending legal-status Critical Current

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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
    • 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
    • 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

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

Abstract

The invention discloses a rod piece connecting system and a connecting method thereof. The connecting system comprises a sleeve for connecting the rod piece and a special anvil for extruding the sleeve to realize the consolidation connection of the sleeve and the rod piece; the connection method adopts a special anvil axial extrusion sleeve driven by a riveting mechanism to realize sleeve shrinkage riveting connection. The connecting system utilizes the principle of metal plastic deformation, uses an extrusion mounting tool to extrude the sleeve along the axial direction of the sleeve so as to shrink the outer diameter of the sleeve, and the sleeve metal flows into gaps between the transverse ribs of the steel bars or clamps the rod pieces along the radial direction so as to ensure that certain tensile strength exists between the rod pieces, and the steel bars or the rod pieces and the sleeve form a whole with certain tensile strength; the extrusion connection mode of the sleeve and the steel bar or the rod piece ensures the consistency and stability of the connection strength of each joint, avoids the performance defect of the joint caused by manual operation, and has firmer connection and higher strength; the processing such as upsetting, peeling and thread rolling is not needed, the speed is high, and the installation efficiency is high.

Description

Rod piece connecting system and connecting method thereof
Technical Field
The invention relates to the technical field of connection of structural rods, in particular to a rod connecting structure, a special tool and a connecting method thereof.
Background
In the building field, rod pieces such as deformed steel bars and wires are often required to be connected, the end parts of two adjacent steel bars are welded and fixed together in a welding mode generally at present and limited by the space of a construction site, and the welded joint is often rusted and welded to influence the connection quality because of insufficient firmness.
The mechanical connection of the steel bars or the rod pieces is a novel connection process and is widely applied to large steel structure buildings of reinforced concrete, such as highway bridges, house construction, nuclear power stations and the like. The connection mode is common by adopting taper sleeve axial connection, threaded connection, grouting sleeve connection and the like; the existing taper sleeve axial extrusion has the defects of more structural parts, high cost, complex locking plate processing technology and the like although the extrusion speed is higher and the extrusion tool is lighter; the most commonly used threaded connections have poor field operability, the joint performance is greatly affected by manual operation, and the joint performance is unstable. The grouting sleeve is high in connection cost, large in field operation difficulty and large in joint installation quality detection difficulty. The existing radial cold extrusion connection has the defects of heavy extrusion tool, low extrusion speed and the like.
Disclosure of Invention
The invention discloses a rod connecting system and a connecting method thereof according to the defects of the prior art. The invention aims to provide a rod piece connecting system and a rod piece connecting method which are good in connecting strength consistency, good in stability, higher in strength, convenient to operate and high in construction efficiency.
The invention is realized by the following technical scheme:
the rod piece connecting system comprises a sleeve for connecting the rod piece and a special anvil for extruding the sleeve to realize the consolidation connection of the sleeve and the rod piece;
the sleeve is provided with a symmetrical round pipe structure, two ends of the symmetrical round pipe structure are used for being sleeved into the rod piece, an outer boss and an inner boss are arranged at the axial center of the round pipe, the opening ends of the two ends of the round pipe are provided with conical ports, and the rear parts of the conical ports of the two ends are provided with deformation transition sections; wherein the inclination angle beta of the conical opening is more than or equal to 90 degrees and less than or equal to 120 degrees, the inclination angle alpha of the transition zone is more than or equal to 0 degrees and less than or equal to 20 degrees, and the length L of the conical opening is more than or equal to 0 degree and less than L1Total length of transition section L1The total length of the sleeve is not more than 1/4;
a specialized anvil, comprising: the two half anchor ears which can be opened, closed and hinged are replaceable and respectively embedded into two anvil half blocks fixed on the inner walls of the two half anchor ears, and the two half anchor ears are inserted into bolts through connecting lugs to be hinged and closed;
and an inner hole formed after the two anvil half blocks are closed is in extrusion fit with circular pipes at two ends of the sleeve to realize the riveting and the consolidation of the sleeve and the rod piece.
The ratio of the inner diameter of the sleeve to the outer diameter of the sleeve is not less than 1/10D3/D1Not more than 9/10, and the diameter D of the outer boss2≥D1The diameter of the inner boss is not less than 0 and not more than D4≤D3。
The outer walls of the two half anchor ears are provided with two ear connection ears along one axial side, and the other side is provided with three ear connection ears.
The outer walls of the two anvil half blocks are circumferentially provided with a plurality of groups of annular grooves and bulges with step structures, and the annular grooves and the bulges of each step structure are matched, embedded and fixed with the bulges and the annular grooves arranged on the inner walls of the two half anchor ears.
The connecting method adopting the rod piece connecting system comprises the following steps:
(1) selecting and determining sleeve parameters and sleeve models according to the size of the connecting rod piece, and determining matched half models of the anvil according to the sleeve models;
(2) embedding and fixing the two anvil half blocks into the two half anchor ears;
(3) inserting one connecting rod piece into one end hole of the sleeve, and then inserting the other connecting rod piece into the other end hole of the sleeve;
(4) enabling the special anvil to be close to the connecting piece, and opening the two half anchor ears prepared in the step (2) to enable the connecting rod piece and the sleeve which is not riveted to be clamped into the special anvil;
(5) closing the two half hoops, and locking the connecting lugs of the two half hoops by using bolts;
(6) setting power source parameters, starting a switch, driving the anchor ears from two ends by adopting a press riveting mechanism and extruding the anvils along the axial direction, so that the special anvils at the two ends are extruded to be in contact with the surface of the outer boss of the sleeve, and the extrusion of the sleeve is finished;
(7) after extrusion is finished, power source parameters are reset, a switch is started, and under the axial acting force of the extrusion mechanism, the two special anvils withdraw along the center of the sleeve until the special anvils completely leave the sleeve, and the sleeve extrusion installation is finished.
The connecting system utilizes the principle of metal plastic deformation, uses an extrusion mounting tool to extrude the sleeve along the axial direction of the sleeve so as to shrink the outer diameter of the sleeve, and the sleeve metal flows into gaps between the transverse ribs of the steel bars or clamps the rod pieces along the radial direction so as to ensure that certain tensile strength exists between the rod pieces, and the steel bars or the rod pieces and the sleeve form a whole with certain tensile strength.
The system sleeve has a simple structure, the consistency and stability of the connection strength of each joint are ensured by the extrusion connection mode of the sleeve and the steel bar or the rod piece, the performance defect of the joint caused by manual operation is avoided, the connection is firmer, and the strength is higher. The connecting steel bar does not need secondary processing such as upsetting, peeling and thread rolling, the construction is convenient, the cost is saved, the extrusion connecting speed is high, and the mounting efficiency is high.
Drawings
FIG. 1 is a schematic cross-sectional view of a connection structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the coupling sleeve of the present invention;
FIG. 3 is a schematic illustration of the dimensions of the coupling sleeve of the present invention;
FIG. 4 is a partial schematic view of the sleeve of the present invention, showing an enlarged view of portion B of FIG. 3;
FIG. 5 is a schematic view of a specialized anvil of the present invention;
FIG. 6 is a schematic view of a sleeve and rod prior to compression bonding in accordance with the present invention;
FIG. 7 is a schematic view of a dedicated anvil installation;
FIG. 8 is a schematic view of a specialized anvil closure;
fig. 9 is a schematic view of a dedicated anvil press.
In the figure, 1 is rod, 2 is sleeve, 3 is special anvil, 31 is anvil half block, 32 is bolt, 33 is hoop, 34 is coupling lug, I is taper mouth, II is deformation transition zone, III is main deformation zone, IV is outer boss, VI is inner boss, D1 is sleeve external diameter, D2 is outer boss diameter, D3 is sleeve internal diameter, D4 is inner boss diameter, L is taper mouth length, L is inner boss length, L is taper mouth length, D is taper mouth length, L is taper mouth length, D is taper mouth length, L is taper mouth length, D is taper mouth length1Is the total length of the transition section, alpha is the transition section angle of inclination, and beta is the angle of the cone mouth.
Detailed Description
The present invention is further described below in conjunction with the following detailed description, which is intended to further illustrate the principles of the invention and is not intended to limit the invention in any way, but is equivalent or analogous to the present invention without departing from its scope.
As shown in the figure, the rod connecting system comprises a sleeve 2 for connecting a rod 1 and a special anvil 3 for extruding the sleeve 2 to realize the consolidation connection of the sleeve 2 and the rod 1;
the sleeve 2 is provided with a symmetrical round pipe structure, two ends of the symmetrical round pipe structure are used for being sleeved into the rod piece, an outer boss IV and an inner boss are arranged at the axial center of the round pipe, the opening ends of two ends of the round pipe are provided with conical ports I, and the rear parts of the conical ports I of the two ends are provided with deformation transition section areas II; wherein the inclination angle beta of the conical opening is more than or equal to 90 degrees and less than or equal to 120 degrees, the inclination angle alpha of the transition zone is more than or equal to 0 degrees and less than or equal to 20 degrees, and the length L of the conical opening is more than or equal to 0 degree and less than L1Total length of transition section L1The total length of the sleeve is not more than 1/4;
a specialized anvil 3, comprising: the two half anchor ears 33 which can be opened, closed and hinged are replaceable and respectively embedded into the two anvil half blocks 31 fixed on the inner walls of the two half anchor ears 33, and the two half anchor ears 33 are inserted into the bolts 32 through the connecting lugs 34 to be hinged and closed;
the inner hole formed after the two anvil half blocks 31 are closed is in extrusion fit with the circular tubes at the two ends of the sleeve 2 to realize the riveting and the consolidation of the sleeve 2 and the rod piece 1.
The ratio of the inner diameter of the sleeve to the outer diameter of the sleeve is not less than 1/10D3/D1Not more than 9/10, and the diameter D of the outer boss2≥D1The diameter of the inner boss is not less than 0 and not more than D4≤D3。
Two ear connection ears 34 are arranged on one side of the outer wall of each of the two half anchor ears 33 along the axial direction, and three ear connection ears 34 are arranged on the other side.
The outer wall of the two anvil half blocks 31 is circumferentially provided with a plurality of groups of annular grooves and bulges with step structures, and the annular grooves and the bulges of each step structure are matched, embedded and fixed with the bulges and the annular grooves arranged on the inner walls of the two half anchor ears 33.
As shown in fig. 2, 3 and 4, the sleeve 2 has a tapered opening I, and the tapered opening I plays a role in centering, positioning and guiding in the initial stage of cold extrusion, so that the contact area between the tool and the sleeve 2 is effectively increased, and the sleeve 2 and the special anvil 3 perform relative movement on the same axis in the initial stage of pressure riveting, so that the sleeve 2 performs uniform and stable plastic deformation; the rear side of the conical opening I is provided with a deformation transition section II which mainly has the function of preventing the eccentric phenomenon caused by overlarge extrusion force in the initial installation stage, and a small amount of metal of the sleeve 2 in the deformation transition section II is extruded between the transverse ribs of the steel bar or between the rod pieces 1 to generate certain tensile strength; the rear side of the deformation transition zone II is a main deformation zone III, the main deformation zone III generates maximum plastic deformation under the action of a special anvil 3, so that metal of the sleeve 2 flows into a gap between the transverse rib of the steel bar or the rod piece 1 can generate high tensile strength, and the main stage of providing the high tensile strength for the rod pieces 1 at two ends is also provided; an outer boss IV is arranged in the middle of the sleeve 2 and serves as an extrusion limiting structure, and when the special anvils 3 at the two ends contact the outer boss IV, extrusion is completed; the inner boss VI plays a role in positioning the connecting rod piece 1 or the steel bar, controls the length of the rod piece 1 or the steel bar which is inserted into the sleeve 2 to be extruded, and solves the phenomenon that the sleeve 2 cannot be fixed when being vertically or obliquely installed.
The angle of the conical opening is more than or equal to 90 degrees and less than or equal to 120 degrees. The inclination angle of the transition section is more than or equal to 0 degree and less than or equal to 20 degrees. The inner diameter and the outer diameter of the sleeve meet D which is not less than 1/103/D1Less than or equal to 9/10. The diameter of the outer boss should satisfy D2≥D1. The diameter of the inner boss should satisfy D is more than or equal to 04≤D3. The length of the conical opening is more than or equal to 0 and less than L1. Total length L of transition section1The value should satisfy L1Not more than 1/4 total length of the sleeve.
The rod connecting system is connected by driving the extrusion mechanism and driving the special anvil 3 by a power source, the power source and the extrusion mechanism adopt conventional mechanisms, and the invention does not describe the press riveting system in detail.
The system connection and installation process of the invention mainly comprises two processes: and (6) pressing and removing the rivet.
The special anvil 3 which is contacted and extruded with the sleeve 2 is of a two-half structure which can be opened, the design is convenient for clamping the reinforcing steel bar or the rod piece 1, both ends of the reinforcing steel bar or the rod piece 1 are infinitely long in an actual construction site, and in order to ensure that the sleeve 2 is extruded along the axial direction of the reinforcing steel bar or the rod piece, the extrusion sleeve 2 and the reinforcing steel bar or the rod piece 1 can be inserted into the center of an extrusion tool, such as the special anvil 3 structure shown in fig. 5.
The special anvil 3 is composed of two half anchor ears 33, two split anvil half blocks 31 and two bolts 32.
Taking the special anvil 3 at one end of the sliding pressure head as an example, because the reinforcing steel bars or rod pieces 1 at two ends of the actual construction site are very long, how to conveniently clamp the non-extruded whole body of the reinforcing steel bars or rod pieces 1 and the connecting sleeve 2 into the extrusion tool needs to be considered.
As shown in fig. 7, a bolt 32 is used to connect the special anvil 3 together, the two half-block hoops 33 connected together can rotate mutually to form a certain opening, the non-extruded whole of the steel bar or the rod 1 and the connecting sleeve 2 can be conveniently clamped into the anvil half-block 31 through the opening, as shown in fig. 8, the two half-block hoops 33 are rotated to close the opening, and the other bolt 32 is used to lock the hoop coupling lug 34, so that the whole of the steel bar or the rod 1 and the non-extruded sleeve 2 is wrapped.
The installation step:
(1) selecting and determining parameters of a sleeve 2 and the model of the sleeve 2 according to the size of the connecting rod piece 1, and determining the model of the matched anvil half block 31 according to the model of the sleeve 2;
(2) two anvil half blocks 31 are embedded and fixed in the two half block anchor ears 33;
(3) inserting one connecting rod piece 1 into one end hole of the sleeve 2, and then inserting the other connecting rod piece 1 into the other end hole of the sleeve 2;
(4) approaching the riveting tool to the workpiece, and opening the two half anchor ears 33 prepared in the step (2) to clamp the connecting rod piece 1 and the sleeve 2 which is not riveted into the special anvil 3;
(5) closing the two half hoops 33, and locking the connecting lugs 34 of the two half hoops 33 by bolts 32;
(6) setting power source parameters, starting a switch, driving the anchor ears from two ends by adopting a press riveting mechanism and extruding the anvils, so that the anvils at the two ends are extruded to be in contact with the surface of the outer boss of the sleeve 2, and the extrusion of the sleeve 2 is finished;
(7) after extrusion is completed, power source parameters are reset, a switch is started, and under the axial acting force of the extrusion mechanism, the two special anvils 3 are withdrawn along the center of the sleeve 2 until the special anvils 3 completely leave the sleeve 2, and the extrusion and installation of the sleeve 2 are completed.

Claims (5)

1. A rod connecting system, characterized by: the connecting system comprises a sleeve for connecting the rod piece and a special anvil for extruding the sleeve to realize the consolidation connection of the sleeve and the rod piece;
the sleeve is provided with a symmetrical round pipe structure, two ends of the symmetrical round pipe structure are used for being sleeved into the rod piece, an outer boss and an inner boss are arranged at the axial center of the round pipe, the opening ends of the two ends of the round pipe are provided with conical ports, and the rear parts of the conical ports of the two ends are provided with deformation transition sections; wherein the inclination angle beta of the conical opening is more than or equal to 90 degrees and less than or equal to 120 degrees, the inclination angle alpha of the transition zone is more than or equal to 0 degrees and less than or equal to 20 degrees, and the length L of the conical opening is more than or equal to 0 degree and less than L1Total length of transition section L1The total length of the sleeve is not more than 1/4;
a specialized anvil, comprising: the two half anchor ears which can be opened, closed and hinged are replaceable and respectively embedded into two anvil half blocks fixed on the inner walls of the two half anchor ears, and the two half anchor ears are inserted into bolts through connecting lugs to be hinged and closed;
and an inner hole formed after the two anvil half blocks are closed is in extrusion fit with circular pipes at two ends of the sleeve to realize the riveting and the consolidation of the sleeve and the rod piece.
2. The rod connecting system of claim 1, wherein: the ratio of the inner diameter of the sleeve to the outer diameter of the sleeve is not less than 1/10D3/D1Not more than 9/10, and the diameter D of the outer boss2≥D1The diameter of the inner boss is not less than 0 and not more than D4≤D3。
3. The rod connecting system of claim 1, wherein: the outer walls of the two half anchor ears are provided with two ear connection ears along one axial side, and the other side is provided with three ear connection ears.
4. A rod connection system according to claim 1, 2 or 3, wherein: the two anvil half-block outer walls are circumferentially provided with a plurality of groups of annular grooves and bulges with step structures, and the annular grooves and the bulges of each step structure are matched, embedded and fixed with the bulges and the annular grooves arranged on the inner walls of the two half anchor ears.
5. A method of connecting rod members, comprising the steps of:
(1) selecting and determining sleeve parameters and sleeve models according to the size of the connecting rod piece, and determining matched half models of the anvil according to the sleeve models;
(2) embedding and fixing the two anvil half blocks into the two half anchor ears;
(3) inserting one connecting rod piece into one end hole of the sleeve, and then inserting the other connecting rod piece into the other end hole of the sleeve;
(4) enabling the special anvil to be close to the connecting piece, and opening the two half anchor ears prepared in the step (2) to enable the connecting rod piece and the sleeve which is not riveted to be clamped into the special anvil;
(5) closing the two half hoops, and locking the connecting lugs of the two half hoops by using bolts;
(6) setting power source parameters, starting a switch, driving the anchor ears from two ends by adopting a press riveting mechanism and extruding the anvils along the axial direction, so that the special anvils at the two ends are extruded to be in contact with the surface of the outer boss of the sleeve, and the extrusion of the sleeve is finished;
(7) after extrusion is finished, power source parameters are reset, a switch is started, and under the axial acting force of the extrusion mechanism, the two special anvils withdraw along the center of the sleeve until the special anvils completely leave the sleeve, and the sleeve extrusion installation is finished.
CN202110697972.0A 2021-06-23 2021-06-23 Rod piece connecting system and connecting method thereof Pending CN113374181A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110697972.0A CN113374181A (en) 2021-06-23 2021-06-23 Rod piece connecting system and connecting method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110697972.0A CN113374181A (en) 2021-06-23 2021-06-23 Rod piece connecting system and connecting method thereof

Publications (1)

Publication Number Publication Date
CN113374181A true CN113374181A (en) 2021-09-10

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Application Number Title Priority Date Filing Date
CN202110697972.0A Pending CN113374181A (en) 2021-06-23 2021-06-23 Rod piece connecting system and connecting method thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114505425A (en) * 2022-03-18 2022-05-17 眉山中车紧固件科技有限公司 Reinforcing steel bar riveting system
CN114643330A (en) * 2022-03-18 2022-06-21 眉山中车紧固件科技有限公司 Reinforcing steel bar rivet withdrawing system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114505425A (en) * 2022-03-18 2022-05-17 眉山中车紧固件科技有限公司 Reinforcing steel bar riveting system
CN114643330A (en) * 2022-03-18 2022-06-21 眉山中车紧固件科技有限公司 Reinforcing steel bar rivet withdrawing system
CN114505425B (en) * 2022-03-18 2024-02-09 眉山中车紧固件科技有限公司 Steel bar riveting system

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