CN106040913B - A kind of steel bar end heating and upsetting processing method - Google Patents
A kind of steel bar end heating and upsetting processing method Download PDFInfo
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- CN106040913B CN106040913B CN201610386740.2A CN201610386740A CN106040913B CN 106040913 B CN106040913 B CN 106040913B CN 201610386740 A CN201610386740 A CN 201610386740A CN 106040913 B CN106040913 B CN 106040913B
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- reinforcing bar
- heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F5/00—Upsetting wire or pressing operations affecting the wire cross-section
- B21F5/005—Upsetting wire
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Abstract
The invention discloses steel bar end heating and upsetting processing method, 1, reinforcing bar heating：In the termination of reinforcing bar, first, second heating electrode is set, and applies active force respectively, makes that the plane of the first heating electrode is close to the end face of steel bar end, the second heating electrode is close on the outer surface of reinforcing bar；Start first, second heating electrode, continuous heating is carried out to reinforcing bar；2nd, reinforcing bar is incubated：By first heating electrode removed from end, and be incubated a period of time make equalizing temperature；3rd, end reinforced jumping-up, the upset force along reinforcing bar length direction is applied to the reinforcing bar termination by the plane of the first heating electrode, pushes end reinforced displacement along its length, shaping in jumping-up fixture is pushed through and forms the jumping-up head expanded.The jumping-up processing method of the present invention, have the advantages that to anchor rigidity big, excellent performance, processing quickly, steady quality, installation it is convenient；Node location concrete construction quality is can guarantee that, improves the correlated performance of tendon concrete structure.
Description
Technical field
The invention belongs to the heat treatment technical field of reinforcing bar, particularly a kind of steel bar end heating and upsetting processing side
Method.
Background technology
Bond and anchor property between reinforcing bar and concrete is to ensure reinforcing bar and the cooperative necessary condition of concrete, because
This must assure that reinforcing bar has enough anchorage lengths, just can guarantee that the correlated performance of reinforced concrete structure meets to require.But by
Being limited in physical dimension, anchorage length needed for straight reinforcing bar is generally difficult to meet, though and Conventional end band crotch machinery anchor type
With simple for production, lower-cost advantage, but because bending segment reinforcing bar and straight reinforcing bar interfere, reinforcing bar colligation is caused to be stranded
Difficulty, especially when needing reinforcing bar, the stirrup of colligation etc. more on big cross section, it is easy to produce location conflicts, live colligation is more
Difficulty, considerably reduce the colligation efficiency of worker；And easily produce colligation loosely wait reduction tendon concrete structure correlation
The situation of performance；Further, the pouring of concrete, the pouring of operation of vibrating, the difficulty of construction for operation of vibrating are increased, it is difficult to ensure that
Node location concrete construction quality.
In the Chinese patent literature of Publication No. 101352748, the preparation method that discloses the reinforcing bar with anchoring section, its
Mainly heated by the way of high-frequency induction heating, and temperature is higher, more than 1300 DEG C (or 1200 DEG C), Upsetting roughcasts tool 30
Forming surface 31 is pressed against on the end face of reinforcing bar, is applied compression stress P, the compression end regions of axis direction on reinforcing bar, is made reinforcing bar
End regions be plastically deformed, enlarged outside diameter, formed jumping-up head.The patent of invention, it is that heating-up temperature is too high first, wave
Take the energy, and a certain degree of change can occur for the structure of reinforcing bar and mechanical property at such high temperatures,
During the compression stress P compression end regions of axis direction, it is easy to steel bar end is produced bending, torticollis, rotten first-class, influence jumping-up
The Forming Quality of head.
The content of the invention
The defects of present invention is directed in the prior art, there is provided a kind of steel bar end heats Upsetting rough machining methods.
Technical scheme：A kind of steel bar end heating and upsetting processing method, it is characterised in that comprise the following steps：
(1) reinforcing bar heats：
According to technological requirement, one end of reinforcing bar is heated；In the termination of reinforcing bar, the first heating electrode is set, is somebody's turn to do remote
Second heating electrode is set at a certain distance from termination；To the first heating electrode and the second heating electrode, apply active force respectively, make
The plane of first heating electrode is close to the end face of steel bar end, the second heating electrode is close on the outer surface of reinforcing bar；Start
First heating electrode and the second heating electrode, while continuous heating to technological requirement is carried out to reinforcing bar and controls temperature；Add first
T is selected between thermode and the second heating electrodemPoint is used as temperature control point, and the temperature of the point is between 500 DEG C -1000 DEG C；
(2) reinforcing bar is incubated：
After temperature reaches technological requirement, stop heating, when the first heating electrode is removed from end, and is incubated one section
Between, the first heating electrode and the second reinforcing bar heated between electrode is carried out heat transfer, equalizing temperature；
(3) end reinforced jumping-up
After temperature control point temperature reaches technological requirement, stop insulation；According to technological requirement, set before the second heating electrode
Jumping-up fixture is put, reinforcing bar is clamped；The plane of first heating electrode is close to the end face of steel bar end, passes through the first heating
The plane of electrode applies the upset force along reinforcing bar length direction to the reinforcing bar termination；The upset force from steel bar end along its length
Act on reinforcing bar, push end reinforced displacement along its length, be pushed through in jumping-up fixture and be molded, be upset deformation
Form the jumping-up head expanded.
Further feature is：The second heating electrode is two pieces be symmetrical set, respectively in indent V-arrangement, is added
Rectangular enclosure is formed among two piece of second heating electrode when heat seal is held together, reinforcing bar is placed in the cavity, the indent V-arrangement of each electrode
Two sides tangentially contacted with rebar surface respectively, form four point symmetries between two piece of second heating electrode and reinforcing bar and contact knot
Structure.
Steel bar thick head a diameter of 1.5D to 3D.
Steel bar thick head thickness is 0.4D to 1.0D.
Described jumping-up fixture, it is made up of symmetrically arranged two pieces of left and right, a circular forming cavity, upsetting is formed after closing up
Reinforcing bar before thick fixture is pushed through in the circular forming cavity, forms the jumping-up head of circle；In-between circular cavity, with
Bar diameter is corresponding, is passed through for reinforcing bar.
Described heating electrode is floating type setting, and auxiliary jacking device is set after the first heating electrode, persistently pair plus
Thermode produces thrust.
Steel bar end heating and upsetting processing method of the present invention, relative to prior art, there are following features：
The present invention is processed and formed at one time using steel bar thick equipment, is formed end reinforced time processing and is expanded jumping-up head work
For reinforcing steel bar machinery anchorage part, have quick big anchoring rigidity, excellent performance, processing, steady quality, installation convenient etc. excellent
Point；Moreover, being easy to the colligation of reinforcing bar during site operation, site operation efficiency is improved；It can guarantee that node location concrete construction matter
Amount, improve the correlated performance of tendon concrete structure；Further, when the upset force of axis direction compresses end regions, can effectively prevent
Only steel bar end produces bending, torticollis, rotten first-class, and the property indices such as the intensity of guarantee jumping-up head, Forming Quality conform to
Ask.
Brief description of the drawings
Fig. 1 is temperature distributing curve diagram of the reinforcing bar in heating between the first heating heating electrode 2 of electrode 1 and second；
Fig. 2 is temperature distributing curve diagram of the reinforcing bar in insulation between the first heating heating electrode 2 of electrode 1 and second；
Fig. 3 is two piece of second heating electrode 2 and reinforcement location relation schematic diagram；
Fig. 4 is jumping-up clamp structure front view；
Fig. 5 is Fig. 4 left view；
Fig. 6 is second of structural representation that the present invention second heats electrode 2；
Fig. 7 is the third structural representation that the present invention second heats electrode 2；
Fig. 8 is the jumping-up header structure schematic diagram formed after jumping-up of the present invention is processed in steel bar end.
Embodiment
Closing specific embodiment below in conjunction with the accompanying drawings, the invention will be further described.
A kind of steel bar end heating and upsetting processing method of the present invention, jumping-up after being heated to reinforcing bar one end, makes the termination
Formed and expand jumping-up head, the reinforcing bar of the reamed end jumping-up mainly as reinforced concrete structure mechanical anchor mode, including
Following procedure of processing：
1. reinforcing bar heats：
According to technological requirement, one end (end regions) of reinforcing bar is heated, is generally heated by resistance heating manner；In reinforcing bar
The termination, the first heating electrode 1 is set, away from setting the second heating electrode 2 at a certain distance from the termination；And add to first
Thermode 1 and second heats electrode 2, applies active force respectively, the plane of the first heating electrode 1 is close to the end of steel bar end
Face, the second heating electrode 2 is set to be close on the outer surface of reinforcing bar, the second annular heating electrode 2 is then encircled and is close in this way
On the outer surface of reinforcing bar；Start the first heating electrode 1 and second and heat electrode 2, while reinforcing bar is heated；First heating electricity
The distance between electrode 2 is heated in pole 1 and second, is determined according to technological requirement, considers the diameter of the reinforcing bar, the jumping-up head obtained
The factors such as physical dimension, heating-up temperature, heating voltage and determine.
First heating electrode 1 position that is in contact with the end face of steel bar end is plane, ensures both contact surfaces as far as possible
Greatly, prevent from producing spark etc. during heating, and can guarantee that heating rise at the uniform velocity, quickly；Further, in use, the first heating
Electrode 1 is in contact position with the end face of steel bar end, because heat effect, function of current etc. are easily damaged, produce it is uneven etc., only
The cut surface by the plane of the first heating electrode 1 is needed to fall, the flatness for reaching requirement just can continue to use, and extend it
Service life and the raising efficiency of heating surface and heating uniformity.First heating electrode 1 is floating type setting, and electrode 1 is heated first
Auxiliary jacking device is set afterwards, such as spring, thrust persistently is produced to the first heating electrode 1, can be along reinforcing bar axis direction
Mobile, guarantee will not be made electrode 1 and reinforcing bar face opening by thermal softening because of reinforcing bar；The end face of steel bar end is smooth in cutting
Degree may not be high, usually have projection position, first heating electrode 1 and steel bar end end face initial contact area it is few, first and
Raised location contacts；In the heating starting stage, the temperature rise of steel bar end and the first heating electrode 1 contact site is very fast,
The first heating electrode 1 persistently press against the position of projection under the pressure effect of auxiliary jacking device, raised position retraction, make the
One heating electrode 1 is gradually all bonded with the end face of steel bar end.
As shown in figure 1, this segment length that reinforcing bar is between the first heating heating electrode 2 of electrode 1 and second, heating one
After the section time, the temperature of the reinforcing bar end along its length is respectively as illustrated, the first heating electrode 1 and second heats the institute of electrode 2
Place's position temperature is higher, and the temperature that the first heating electrode 1 and second is heated between electrode 2 is relatively low, temperature distribution history such as Fig. 1 institutes
Show.Heating-up temperature or heat time, determined according to technological requirement.The present invention chooses tmPoint is used as temperature control point, and the temperature of the point exists
Between 500 DEG C -1000 DEG C, final temperature control point temperature is determined according to technique, such as 500 DEG C, 550 DEG C, 600 DEG C, 650 DEG C, 700
DEG C, 750 DEG C, 800 DEG C, 850 DEG C, 900 DEG C, 950 DEG C, 960 DEG C, 980 DEG C, 990 DEG C etc., can meet to be actually needed.tmPoint is made
For temperature control point, the intermediate region of the first heating electrode 1 and the second heating electrode 2 is located substantially at, temperature is relatively low when belonging to heating
Region.
2nd, reinforcing bar is incubated：
After temperature (temperature control point temperature) or heat time technological requirement is reached, stop heating, by first heating electrode 1 from
End is removed, and is incubated a period of time, the reinforcing bar before the second heating electrode 2 is carried out heat transfer, is realized equalizing temperature；
After first heating electrode 1 is removed from end, end heat loss is smaller, still keeps higher temperature.
After warm, after the time of technological requirement reaches, or after temperature reaches requirement, the reinforcing bar end is along its length
Temperature is as shown in Fig. 2 temperature homogenizes, and to the second heating electrode 2 since termination, thermograde is relatively low, and the temperature difference is smaller.
3rd, end reinforced jumping-up
After temperature or soaking time reach technological requirement, stop insulation；According to technological requirement, reinforcing bar is clamped,
Jumping-up fixture is set before the second heating electrode 2；And the plane of the first heating electrode 1 is close to the end face of steel bar end；So
Apply the upset force along reinforcing bar length direction to the steel bar end by the first heating electrode 1 afterwards；The upset force adds by first
Thermode 1 is acted on reinforcing bar along its length from steel bar end, and applying upset force (pressure) from end pushes end reinforced edge
Length direction displacement, it is pushed through in jumping-up fixture and is molded, is upset deformation and forms the jumping-up head expanded.
Jumping-up fixture is a bite, and applying clamping force makes it encircle and be close on the outer surface of reinforcing bar；The
Two heating electrodes 2 can be used as auxiliary bite, or face sets clamping device behind in addition, and reinforcing bar is clamped, carried
For suitable gripping strength；The jumping-up fixture, after equalizing temperature, the upset force that can more prevent from acting on along its length acts on
Bending, torticollis, rotten first-class is produced in steel bar end.After jumping-up, steel bar thick head a diameter of 1.5D to 3D, significantly increase.
As shown in figure 3, the second heating electrode 2 is two pieces be symmetrical set, respectively in indent V-arrangement, close up latter two pieces
Rectangular enclosure is formed among second heating electrode 2, reinforcing bar is placed in the cavity, two sides point of the indent V-arrangement of each electrode
Do not contacted tangentially with rebar surface, four point symmetry contact structures are formed between two piece of second heating electrode 2 and reinforcing bar；The structure,
The efficiency of heating surface, and homogeneous heating can be improved；In clamping, reinforcing bar uniform stressed can be made.The electrode 2 of the present invention, is a kind of tool
Body example structure, structure type should have many kinds, and as shown in Figure 6,7, two piece second of left and right heating electrode 2 is conventional square
Shape or semicircular structure, reinforcing bar both sides are separately positioned on, are selected according to being actually needed.
As shown in Figure 4,5, a kind of specific embodiment jumping-up fixture of the invention, by left and right, two pieces form, and two pieces of left and right is right
Claiming to set, one circular forming cavity of formation after closing up, the reinforcing bar before jumping-up fixture is pushed through in the circular forming cavity,
Form circular jumping-up head；In-between circular cavity, it is corresponding with bar diameter, passed through for reinforcing bar.Certainly, jumping-up of the invention
Fixture, is a kind of specific embodiment structure, and in actual processing, the structure type of jumping-up fixture should have many kinds, is not limited to this
The circular configuration of meaning is illustrated, meets respective requirement.
As shown in figure 8, after jumping-up, the jumping-up head of diameter increase, a diameter of 1.5D of jumping-up head are formed in the termination of reinforcing bar
To 3D, significantly increase；Jumping-up head thickness is 0.4D to 1.0D.Jumping-up head of the invention shown in figure, is a kind of specific implementation
Example structure, in actual processing, the structure of jumping-up head should have many kinds, be not limited to the circular configuration of this diagram meaning, meet each
Requirement.
Claims (4)
1. a kind of steel bar end heating and upsetting processing method, it is characterised in that comprise the following steps：
（1）Reinforcing bar heats：
According to technological requirement, one end of reinforcing bar is heated；In the termination of reinforcing bar, the first heating electrode is set（1）, away from the end
Second heating electrode is set at a certain distance from head（2）；To the first heating electrode（1）With the second heating electrode（2）, apply make respectively
Firmly, the first heating electrode is made（1）Plane be close to the end face of steel bar end, make the second heating electrode（2）It is close to reinforcing bar
On outer surface；Start the first heating electrode（1）With the second heating electrode（2）, while continuous heating to technique is carried out to reinforcing bar and is wanted
Seek control temperature；Electrode is heated first（1）With the second heating electrode（2）Between select tm points as temperature control point, the temperature of the point
Degree is between 500 DEG C -1000 DEG C；
The second heating electrode（2）For two pieces be symmetrical set, respectively in indent V-arrangement, two piece second is heated when closing up
Heat electrode（2）Centre forms rectangular enclosure, and reinforcing bar is placed in the cavity, two sides difference of the indent V-arrangement of each electrode
Tangentially contacted with rebar surface, two piece of second heating electrode（2）Four point symmetry contact structures are formed between reinforcing bar；
（2）Reinforcing bar is incubated：
After temperature reaches technological requirement, stop heating, electrode is heated by first（1）When being removed from end, and being incubated one section
Between, make the first heating electrode（1）With the second heating electrode（2）Between reinforcing bar carry out heat transfer, equalizing temperature；
（3）End reinforced jumping-up
After temperature control point temperature reaches technological requirement, stop insulation；According to technological requirement, electrode is heated second（2）Set before
Jumping-up fixture is put, reinforcing bar is clamped；Electrode is heated by first（1）Plane be close to the end face of steel bar end, pass through first
Heat electrode（1）Plane to the reinforcing bar termination apply along reinforcing bar length direction upset force；The upset force is from steel bar end edge
Length direction is acted on reinforcing bar, pushes end reinforced displacement along its length, is pushed through in jumping-up fixture and is molded, quilt
Upsetting forms the jumping-up head expanded；
Described jumping-up fixture, it is made up of symmetrically arranged two pieces of left and right, a circular forming cavity, jumping-up folder is formed after closing up
The reinforcing bar of tool above is pushed through in the circular forming cavity, forms the jumping-up head of circle；In-between circular cavity, with reinforcing bar
Diameter is corresponding, is passed through for reinforcing bar.
2. steel bar end heating and upsetting processing method according to claim 1, it is characterised in that：Steel bar thick head is a diameter of
1.5D to 3D.
3. steel bar end heating and upsetting processing method according to claim 1, it is characterised in that：Steel bar thick head thickness is
0.4D to 1.0D.
4. according to any steel bar end heating and upsetting processing method of claim 1-3, it is characterised in that：Described first
Heat electrode（1）It is floating type setting, electrode is heated first（1）Auxiliary jacking device is set afterwards, persistently to the first heating electricity
Pole（1）Produce thrust.
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| CN201610386740.2A CN106040913B (en) | 2016-06-05 | 2016-06-05 | A kind of steel bar end heating and upsetting processing method |
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| CN201610386740.2A CN106040913B (en) | 2016-06-05 | 2016-06-05 | A kind of steel bar end heating and upsetting processing method |
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| CN106040913B true CN106040913B (en) | 2018-01-26 |
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| CN107716789A (en) * | 2017-10-16 | 2018-02-23 | 杨秀敏 | A kind of reinforcing bar hot upsetting pitch thread forming method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2570547A (en) * | 1947-12-18 | 1951-10-09 | Hanna Merrill Oliver | Method of and apparatus for electrically heating and upsetting metal rods or bars |
| DE1258240B (en) * | 1964-12-04 | 1968-01-04 | Hasenclever A G Maschf | Process for hot upsetting of, in particular, rod-shaped work pieces |
| JPH0275430A (en) * | 1988-09-12 | 1990-03-15 | Hokkai Koki Kk | Method for forming pc steel stranded wire head |
| JPH08192240A (en) * | 1995-01-11 | 1996-07-30 | Nippon Concrete Ind Co Ltd | Rivet head machining method of steel wire with upsetter |
| CN2412678Y (en) * | 1999-12-10 | 2001-01-03 | 南京费隆复合材料有限责任公司 | Microprocessor program control electric heating high-strengrh reiforced bar button head machine |
| JP4965312B2 (en) * | 2007-03-29 | 2012-07-04 | 株式会社電元社製作所 | Energizing upsetter method and apparatus |
| CN101352748B (en) * | 2007-07-24 | 2010-10-13 | 第一高周波工业株式会社 | Method for producing reinforced bar with anchoring section |
| CN102605901A (en) * | 2012-04-05 | 2012-07-25 | 江苏金砼预制装配建筑发展有限公司 | Reinforcing steel bar assembly type structural reinforcing steel bar for building, connecting head part molding method and connecting head part molding mold |
| CN204220869U (en) * | 2014-10-23 | 2015-03-25 | 河南宝润机械有限公司 | Steel bar thick machine |
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