CN1205254A - Cold-rolled deformed steel bar production process - Google Patents
Cold-rolled deformed steel bar production process Download PDFInfo
- Publication number
- CN1205254A CN1205254A CN 97112208 CN97112208A CN1205254A CN 1205254 A CN1205254 A CN 1205254A CN 97112208 CN97112208 CN 97112208 CN 97112208 A CN97112208 A CN 97112208A CN 1205254 A CN1205254 A CN 1205254A
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- China
- Prior art keywords
- reinforcing bar
- rolling
- deflection
- predeformation
- product
- 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.)
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 15
- 239000010959 steel Substances 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 31
- 238000005096 rolling process Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims abstract description 3
- 238000005516 engineering process Methods 0.000 claims description 11
- 238000005097 cold rolling Methods 0.000 claims description 8
- 210000003205 muscle Anatomy 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims 1
- 210000002435 tendon Anatomy 0.000 claims 1
- 238000012797 qualification Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 239000010432 diamond Substances 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- XYFCBTPGUUZFHI-UHFFFAOYSA-O phosphonium Chemical compound [PH4+] XYFCBTPGUUZFHI-UHFFFAOYSA-O 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Metal Rolling (AREA)
Abstract
A cold-rolled deformed reinforcing bar is produced by feeding the reinforcing bar predeformed by predeformation machine (4) into a stepless regulating double-roller mill (5), rolling at the deformation temperature of 120-170 deg.C, deformation amount of 10-23% and deformation speed of 0.3-1 m/s, the cross section of the rolled reinforcing bar can be flat, diamond or square, and then twisting and deforming by the deforming machine (6). The process is suitable for low-carbon steel produced by various manufacturers, equipment is simple, the elongation delta 5 of a product processed by the process is greater than 8%, the tensile ultimate strength sigma ↓ [ S ] >580N/mm otropic [2], the qualification rate of the product reaches more than 95%, the product exceeds the national new III-grade steel level, the product can save more than one third of steel when being used as a building rib, and the economic benefit is remarkable.
Description
The present invention relates to a kind of production technology of cold rolling reinforcing bar.
In the last hundred years, building trade adopts the hot calendering round bar to make building bar always, and this reinforced steel bar strength is low, and is poor with the bond stress of cement.Reduce amount of reinforcement for improving reinforced steel bar strength, each state is all in the method for studying cold-finished steel, the Italian cold drawing and rolling reinforcing bar σ technology that China introduced in recent years is exactly wherein a kind of, adopt this explained hereafter reinforcing bar, though intensity has improved, but, can not be used for building because toughness and welding performance degenerate.The production technology that BP discloses a kind of cold rolling reinforcing bar No. 1378569, it is rolling that this process using is mutually 90 ° four-high mill, the deflection of reinforcing bar is 6%～8%, reinforcing bar section after rolling is square, roll on the surface screw thread, carry out torsional deflection again by rolling reinforcing bar, to improve reinforced steel bar strength.The reinforcing bar of Sheng Chaning in this way, yield strength σ
0.2Be 470N/mm
2, and certain toughness is arranged.But this technology rolling mill structure complexity, the Roller Machining difficulty, the rolling reduction narrow range, strict to making mother metal, the bond stress and the spiral of product are suitable.
The objective of the invention is to overcome above-mentioned deficiency of the prior art, provide a kind of process equipment simple, less demanding to parent material of reinforcement rebar, its every performance indications of the reinforcing bar after the processing all are better than the cold rolling reinforcing bar producing process of BP.
Purpose of the present invention can reach by following measure.At first common low carbon steel disk circle is placed on the pay off rack, reinforcing bar is sent into the predeformation machine carry out crooked predeformation, remove Phosphonium, derust, and make it to produce forward pull, to adjust little deflection.To send into the stepless speed regulation double-roll rolling mill through the reinforcing bar of predeformation then, be 120～170 ℃ in deformation temperature, and deflection is 10～23%, and deformation velocity is that to carry out normal temperature under the process conditions of 0.3m/s～1m/s rolling.Note the proportionate relationship of grasping deflection and phosphorus content and mother metal diameter when rolling, note deformation temperature in addition, preferably be no more than 170 ℃, prevent that the too high material of Yin Wendu from becoming fragile, toughness descends.The reinforcing bar that rolls into flat is sent into texturing machine carry out torsional deflection,, alleviate the stress of rolling generation on the one hand, increase torsional deflection stress on the other hand, make the internal stress equilibrium of reinforcing bar so that the reinforcing bar after the rolling elongation shrinks again.Torsional deflection is regulated according to the pitch of reversing that is not more than 14 times of d of mother metal, to form every meter stable length weight tolerance.At last, through the reinforcing bar of torsional deflection to the cutter fixed ruler cutting.Whole technical process is continuous, mechanization, and the power of reinforcing bar operation is the roll-in transmission of roll squeezer.Add emulsion in roll-in and the torsional deflection process or water cools off and lubricates.
This technology becomes Roller Machining as shown in Figure 3, has rhombus or square groove along the roll circumference center line, reinforcing bar can be rolled into the rhombus of section such as Fig. 2 and square product, also can open other special-shaped grooves to adapt to the needs of major diameter building bar.
The best deformation temperature of this technology when rolling is 140～160 ℃, and best deflection is 15%～18%.
The present invention has following advantage compared to existing technology:
1. the product that adopts the present invention to process, performance indications are δ 5 〉=8%, σ
5〉=580N/mm
2, qualification rate reaches more than 95%.Make very common low-carbon (LC) building round steel, rise to the level of new III level steel, considerably beyond 16Mn, 20MnSi, the working strength of steel grades such as 25MnSi.Product good welding performance, and because unique outlook (being flat), its bond stress has an improvement than BP is big, be 1.4～1.6 times of regular screw threads reinforcing bar, changed the stress of reinforced concrete structure greatly, made distress in concrete diminish, disperse, amount of deflection diminishes.
2. employing the present invention, equipment requires simpler than the four-high mill of BP, and rolling mill practice is simple, promotes easily.
3. employing the present invention, therefore deflection wider range of permission is regardless of the steel source, and the low-carbon (LC) steel disk circle that general domestic steel mill produces has open defect so long as not itself, can both reach above-mentioned performance indications by this processes.
4. saving raw material.Because this handicraft product intensity improves, and compares with muscle with original building, can save steel more than 1/3rd.
The present invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a process flow diagram of the present invention;
Fig. 2 is flat, rhombus, square product schematic diagram;
Fig. 3 is rolling flat, rhombus, square bar roll schematic diagram.
Embodiment 1. is by shown in Figure 1, with diameter is φ 6.5mm, carbon equivalent is 0.35 reinforcing bar dish circle, connect to be placed on butt welding machine (1) and deposit on the coil holder (2), send into predeformation machine (4) by pay off rack (3), to send into stepless speed regulation double-roll rolling mill (5) through the reinforcing bar of predeformation is rolled, the rolling deformation temperature is 140 ℃, and deflection is 18%, and deformation velocity is 0.5m/s, rolling good reinforcing bar is sent into texturing machine (6) carry out torsional deflection, pitch is 90mm, by cutter (7), reinforcing bar is served collecting frame (8) at last, scale is cut off when running into fixed ruler baffle (9), just can obtain the flat product that every performance indications all meet requirement of the present invention.
Embodiment 2. is φ 8mm with diameter, and carbon equivalent is 0.35 reinforcing bar, is 120 ℃ in deformation temperature, deflection is 23%, and deformation velocity is 0.5m/s, and pitch is under the technological parameter of 110mm, by above-mentioned technology, can obtain the flat product of the performance indications that requirement of the present invention reaches.
Embodiment 3. is φ 8mm with diameter, and carbon equivalent is 0.32 reinforcing bar, is 150 ℃ in deformation temperature, deflection is 10%, and deformation velocity is 0.9m/s, and pitch is under the technological parameter of 110mm, by above-mentioned technology, just can obtain the square product that every performance indications all meet requirement of the present invention.
Claims (3)
1. cold rolling reinforcing bar producing process, at first with low-carbon steel rod bundle, carry out predeformation by predeformation machine (4), entering stepless speed regulation roll squeezer (5) then carries out cold rolling, enter texturing machine (6) at last and carry out torsional deflection, it is characterized in that reinforcing bar is being rolled through sending into double-roll rolling mill after the positive negative direction predeformation, each technological parameter when it is rolling is: 120～170 ℃ of deformation temperatures, deflection is 10～23%, deformation velocity is 0.3m/s～1m/s, is flat by the bar cross section after cold rolling.
2. production technology according to claim 1 is characterized in that deformation temperature is preferably 140～160 ℃, and deflection is preferably 15%～18%.
3. according to claim 1,2 described production technologies, after it is characterized in that opening rhombus or square groove along the two roller circumferential centerline of milling train, but machined steel breaking of muscle and tendon face is rhombus, square product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97112208 CN1205254A (en) | 1997-07-14 | 1997-07-14 | Cold-rolled deformed steel bar production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97112208 CN1205254A (en) | 1997-07-14 | 1997-07-14 | Cold-rolled deformed steel bar production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1205254A true CN1205254A (en) | 1999-01-20 |
Family
ID=5172145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97112208 Pending CN1205254A (en) | 1997-07-14 | 1997-07-14 | Cold-rolled deformed steel bar production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1205254A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406603C (en) * | 2004-10-12 | 2008-07-30 | 昆明钢铁股份有限公司 | Parent metal dedicated to cold rolled reinforcing steel bar with ribs |
| CN100406604C (en) * | 2004-10-12 | 2008-07-30 | 昆明钢铁股份有限公司 | Dedicated base material for making nails and cold rolling reinforced steel bar with ribs |
| CN100406602C (en) * | 2004-10-12 | 2008-07-30 | 昆明钢铁股份有限公司 | Dedicated base material for cold rolling reinforced steel-bar with ribs in low alloy |
| CN111097796A (en) * | 2019-03-13 | 2020-05-05 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Production system and production method of high-ductility ribbed steel bar |
| CN112108517A (en) * | 2019-06-19 | 2020-12-22 | 烟台新科钢结构有限公司 | Device for producing twisted square steel by planetary roller |
| CN117358756A (en) * | 2023-09-26 | 2024-01-09 | 安徽富凯特材有限公司 | Rolling method for improving internal structure of ferronickel-chromium high-temperature corrosion-resistant alloy |
-
1997
- 1997-07-14 CN CN 97112208 patent/CN1205254A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406603C (en) * | 2004-10-12 | 2008-07-30 | 昆明钢铁股份有限公司 | Parent metal dedicated to cold rolled reinforcing steel bar with ribs |
| CN100406604C (en) * | 2004-10-12 | 2008-07-30 | 昆明钢铁股份有限公司 | Dedicated base material for making nails and cold rolling reinforced steel bar with ribs |
| CN100406602C (en) * | 2004-10-12 | 2008-07-30 | 昆明钢铁股份有限公司 | Dedicated base material for cold rolling reinforced steel-bar with ribs in low alloy |
| CN111097796A (en) * | 2019-03-13 | 2020-05-05 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Production system and production method of high-ductility ribbed steel bar |
| CN112108517A (en) * | 2019-06-19 | 2020-12-22 | 烟台新科钢结构有限公司 | Device for producing twisted square steel by planetary roller |
| CN117358756A (en) * | 2023-09-26 | 2024-01-09 | 安徽富凯特材有限公司 | Rolling method for improving internal structure of ferronickel-chromium high-temperature corrosion-resistant alloy |
| CN117358756B (en) * | 2023-09-26 | 2024-05-14 | 安徽富凯特材有限公司 | Rolling method for improving internal structure of ferronickel-chromium high-temperature corrosion-resistant alloy |
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