CN105057407B - Straightening method of large-bending and difficult-to-deform bar material - Google Patents
Straightening method of large-bending and difficult-to-deform bar material Download PDFInfo
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- CN105057407B CN105057407B CN201510608236.8A CN201510608236A CN105057407B CN 105057407 B CN105057407 B CN 105057407B CN 201510608236 A CN201510608236 A CN 201510608236A CN 105057407 B CN105057407 B CN 105057407B
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Abstract
The invention provides a straightening method of a large-bending and difficult-to-deform bar material. A seven-roller straightening machine is used, and the biting of the large-bending bar material is guaranteed by adopting a hydraulic quick opening function; one degree is reduced on the basis of an angle needed by an original equal specification so that the bar material and a straightening roller are relatively tightly fitted; a micro-straightening link is formed by the bar material in a horizontal plane in a single roller so that the straightening effect is improved; an inflection amount needed by an original equal specification is increased to 1.5 times and a rolling reduction amount is increased to 2 times, so that whole straightening inflection is relatively sufficient; and the primary straightening yield of the large-bending and difficult-to-deform bar material is improved and can reach more than or equal to 98%, and any extra investment is not needed so that the enterprise cost is reduced and enterprise benefits are improved.
Description
Technical field
The invention belongs to bar material straightening technical field, more particularly to a kind of method for aligning of macrobending hardly possible deformation bar.
Background technology
Rectify nothing more than gag press straightening, cross roll aligning, parallel rollers aligning and rotating frame currently for the method for aligning of bar
Directly.Wherein gag press straightening engine efficiency is low, low precision；Parallel rollers leveller equipment is huge, roll change is complicated；Rotating frame aligns owner
It is used for uncoiling aligning；Cross-roll straightening machine is widely used the advantages of its high precision, efficiency high.Wherein cross-roll straightening machine is again
It is divided into two-roll reeler and multi-roll straightening machine, two-roll reeler has substantially solved the aligning of bar length range, but due to
Require the flexibility of supplied materials in 5mm/m or so so that what which was applied is subject to certain restrictions.And in multi-roll straightening machine especially more than
Lower synchronous driving, the seven roller straightener using effects tight to roll-in are best.
But when the metal of the difficult deformation of some macrobendings (flexibility is more than 30mm/m) is aligned in seven roller straighteners, often
There is once aligning rate and, than relatively low situation, following method is usually used at present：
1st, repeatedly align repeatedly.So not only take time and effort, simultaneously because repeatedly alternating bending causes bar to produce processing
Hardening, bar internal flaw is amplified.
2nd, align after heating.The yield limit of material is reduced after heating, it is convenient to align, but considerably increase product
Cost.Easily there is second order buckling in the process for being cooled down after aligning simultaneously again.
The content of the invention
In order to overcome the shortcoming of above-mentioned prior art, it is an object of the invention to provide a kind of difficult deformation bar of macrobending
Method for aligning, improves bar and once aligns qualification rate, improve the performance of enterprises.
In order to achieve the above object, the technical scheme taken of the present invention is：
A kind of method for aligning of the difficult deformation bar of macrobending, comprises the steps：
1), using seven roller straighteners, function is opened soon using hydraulic pressure and ensures nipping for macrobending bar, specially：Using seven
In roller straightener, accident opens function soon, before bending bar enters seven roller straighteners, first upper roller is opened, macrobending rod
After material enters into first pair of smoothing roll, the first upper roller is quickly depressed, it is ensured that macrobending bar is smoothly nipped；
2), reduce 1 ° on the basis of the angle needed for original equivalent specifications so that the laminating of bar and smoothing roll is more
Closely, bar forms a micro- aligning link on the horizontal plane in single roller；
3) the recurvation amount needed for original equivalent specifications is increased to into 1.5 times, drafts increases to 2 times so that whole to rectify
Straight recurvation is more abundant.
Beneficial effects of the present invention are as follows：Using existing seven roller straighteners equipment, enter to coordinate little using the fast open bite of hydraulic pressure
The method of the big recurvation of angle realizes the aligning of the difficult deformation bar of macrobending, and the once aligning that improve the difficult deformation bar of macrobending is closed
Lattice rate, can reach more than 98%.Without any additional investment, entreprise cost is reduced, improve the performance of enterprises.
Specific embodiment
The present invention is described further with reference to 3 groups of comparative examples, embodiments.
Comparative example 1：To align, diameter 40mm flexibility is 20 ‰ 45# steel and diameter 40mm flexibility is 40 ‰
As a example by 60Si2Mn, during aligning 45# steel, according to normal procedure, the flexibility of bar is less, and bar can smoothly nip main frame,
And aligned according to 32 ° of the angle of equipment regulation, drafts 2mm, recurvation amount 8mm, after aligning, the linearity of bar exists
Within 1 ‰, once aligning qualification rate is more than 98%；During aligning 60Si2Mn steel, according to ginseng same during above-mentioned aligning 45# steel
Number is aligned, and after aligning, the linearity of bar aligns 1 ‰ qualification rates within 2 ‰, once 30% or so, and Jing often occurs
The situation of main frame cannot be nipped.
Embodiment 1：Adopt the inventive method that diameter 40mm flexibility in comparative example is carried out for 40 ‰ 60Si2Mn below
Aligning.
A kind of method for aligning of the difficult deformation bar of macrobending, comprises the following steps：
1), using seven roller straighteners, function is opened soon using hydraulic pressure and ensures nipping for macrobending bar, specially：Using seven
In roller straightener, accident opens function soon, and when bar head distance first is to smoothing roll 100mm, number one upper roller is quickly lifted,
Deng bar end when first pair of smoothing roll, the first upper roller is quickly depressed and is aligned, it is ensured that macrobending bar it is suitable
Profit is nipped；
2), 1 °, i.e., 31 ° are reduced on the basis of 32 ° of angle needed for original equivalent specifications so that bar and smoothing roll
Laminating is even closer, and bar forms a micro- aligning link on the horizontal plane in single roller, improves leveling effect；
3) the recurvation amount needed for original equivalent specifications is increased to into 1.5 times, i.e. recurvation amount 12mm, drafts increases to 2
Times, i.e. drafts 4mm so that the recurvation of whole aligning is more abundant.
Using a kind of method for aligning of the difficult deformation bar of the macrobending of the present invention, after aligning the linearity of bar 1 ‰ with
Interior, once aligning qualification rate is more than 98%.
Comparative example 2：To align the 45# steel that diameter 20mm flexibility is 20 ‰ and the 45# that diameter 20mm flexibility is 50 ‰
As a example by steel, when aligning flexibility is 20 ‰ 45# steel, according to normal procedure, the flexibility of bar is less, and bar can be smoothly
Main frame is nipped, and is aligned according to 28 ° of the angle of equipment regulation, drafts 2mm, recurvation amount 15mm, bar after aligning
Linearity within 1 ‰, once align qualification rate more than 98%；When aligning flexibility is 50 ‰ 45# steel, according to above-mentioned
During aligning 45# steel, same parameter is aligned, and after aligning, the linearity of bar within 2 ‰, is once aligned 1 ‰ qualification rates and existed
80% or so, and Jing often generations cannot nip the situation of main frame.
Embodiment 2：Adopt the inventive method that diameter 20mm flexibility in comparative example is rectified for 50 ‰ 45# steel below
Directly.
A kind of method for aligning of the difficult deformation bar of macrobending, comprises the following steps：
1), using seven roller straighteners, function is opened soon using hydraulic pressure and ensures nipping for macrobending bar, specially：Using seven
In roller straightener, accident opens function soon, and when bar head distance first is to smoothing roll 100mm, number one upper roller is quickly lifted,
Deng bar end when first pair of smoothing roll, the first upper roller is quickly depressed and is aligned, it is ensured that macrobending bar it is suitable
Profit is nipped；
2), 1 °, i.e., 27 ° are reduced on the basis of 28 ° of angle needed for original equivalent specifications so that bar and smoothing roll
Laminating is even closer, and bar forms a micro- aligning link on the horizontal plane in single roller, improves leveling effect；
3) the recurvation amount needed for original equivalent specifications is increased to into 1.5 times, i.e. recurvation amount 22mm, drafts increases to 2
Times, i.e. drafts 4mm so that the recurvation of whole aligning is more abundant.
Using a kind of method for aligning of the difficult deformation bar of the macrobending of the present invention, after aligning the linearity of bar 1 ‰ with
Interior, once aligning qualification rate is more than 98%.
Comparative example 3：To align the 45# steel that diameter 30mm flexibility is 20 ‰ and the 45# that diameter 30mm flexibility is 20 ‰
As a example by quenched material, during aligning 45# steel, according to normal procedure, the flexibility of bar is less, and bar can smoothly nip main frame,
And aligned according to 30 ° of the angle of equipment regulation, drafts 2mm, recurvation amount 10mm, after aligning, the linearity of bar exists
Within 1 ‰, once aligning qualification rate is more than 98%；During the aligning quenched materials of 45#, according to ginseng same during above-mentioned aligning 45# steel
Number is aligned, and after aligning, the linearity of bar aligns 1 ‰ qualification rates within 2 ‰, once 50% or so, needs to enter repeatedly
Row aligning.
Embodiment 3：The inventive method is adopted to enter diameter 30mm flexibility in comparative example for the quenched materials of 20 ‰ 45# below
Row aligning.
A kind of method for aligning of the difficult deformation bar of macrobending, comprises the following steps：
1), using seven roller straighteners, employ hydraulic pressure and open nipping for function guarantee macrobending bar soon, specially：Utilize
In seven roller straighteners, accident opens function soon, and when bar head distance first is to smoothing roll 100mm, number one upper roller is quickly lifted
Rise, wait bar end when first pair of smoothing roll, the first upper roller is quickly depressed and aligned, it is ensured that macrobending bar
Smoothly nip；
2), 1 °, i.e., 27 ° are reduced on the basis of 30 ° of angle needed for original equivalent specifications so that bar and smoothing roll
Laminating is even closer, and bar forms a micro- aligning link on the horizontal plane in single roller, improves leveling effect；
3) the recurvation amount needed for original equivalent specifications is increased to into 1.5 times, i.e. recurvation amount 15mm, drafts increases to 2
Times, i.e. drafts 4mm so that the recurvation of whole aligning is more abundant.
Using a kind of method for aligning of the difficult deformation bar of the macrobending of the present invention, after aligning the linearity of bar 1 ‰ with
Interior, once aligning qualification rate is more than 98%.
Claims (1)
1. a kind of macrobending hardly possible deforms the method for aligning of bar, it is characterised in that comprise the steps：
1), using seven roller straighteners, function is opened soon using hydraulic pressure and ensures nipping for the difficult deformation bar of macrobending, specially：Utilize
In seven roller straighteners, accident opens function soon, before the difficult deformation bar of macrobending enters seven roller straighteners, by first pair of smoothing roll
In upper straightening roll open, after the difficult deformation bar of macrobending enters into first pair of smoothing roll, the upper aligning in first pair of smoothing roll
Roller is quickly depressed, it is ensured that macrobending is difficult to deform smoothly nipping for bar；
2), reduce 1 ° on the basis of the angle needed for original equivalent specifications so that the laminating of bar and smoothing roll is even closer,
Bar forms a micro- aligning link on the horizontal plane in single roller；
3) the recurvation amount needed for original equivalent specifications is increased to into 1.5 times, drafts increases to 2 times so that whole aligning is anti-
It is curved more abundant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510608236.8A CN105057407B (en) | 2015-09-22 | 2015-09-22 | Straightening method of large-bending and difficult-to-deform bar material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510608236.8A CN105057407B (en) | 2015-09-22 | 2015-09-22 | Straightening method of large-bending and difficult-to-deform bar material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105057407A CN105057407A (en) | 2015-11-18 |
| CN105057407B true CN105057407B (en) | 2017-04-26 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0847722A (en) * | 1994-08-08 | 1996-02-20 | Nippon Steel Corp | Method and device for straightening bend for steel pipe |
| JPH1085835A (en) * | 1996-09-18 | 1998-04-07 | Tsubaki Nakashima:Kk | Bend straightening device of track carriage in linear motion bearing |
| CN101077511A (en) * | 2007-06-27 | 2007-11-28 | 杨泽 | A plurality of roller build-up curve roller type steel tube flattening machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2293398Y (en) * | 1996-02-17 | 1998-10-07 | 机械工业部西安重型机械研究所 | Roll-separating mechanism of straightening machine for metal round material |
-
2015
- 2015-09-22 CN CN201510608236.8A patent/CN105057407B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0847722A (en) * | 1994-08-08 | 1996-02-20 | Nippon Steel Corp | Method and device for straightening bend for steel pipe |
| JPH1085835A (en) * | 1996-09-18 | 1998-04-07 | Tsubaki Nakashima:Kk | Bend straightening device of track carriage in linear motion bearing |
| CN101077511A (en) * | 2007-06-27 | 2007-11-28 | 杨泽 | A plurality of roller build-up curve roller type steel tube flattening machine |
Non-Patent Citations (3)
| Title |
|---|
| 二辊矫直机矫直辊形及矫直精度研究;刘志亮等;《物理测试》;20081130;第26卷(第06期);第39-42页 * |
| 斜轧钢管矫正机压扁量的确定;宋华等;《钢管》;19990630;第28卷(第03期);第10-14页 * |
| 斜辊钢管矫正机主要设计参数的选择及其对矫正质量的影响;宋华等;《机械设计》;19991130(第11期);第38-40页 * |
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| CN105057407A (en) | 2015-11-18 |
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