CN104249090B - A kind of superhigh intensity precision rectangular tube forming method and device - Google Patents
A kind of superhigh intensity precision rectangular tube forming method and device Download PDFInfo
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- CN104249090B CN104249090B CN201410477990.8A CN201410477990A CN104249090B CN 104249090 B CN104249090 B CN 104249090B CN 201410477990 A CN201410477990 A CN 201410477990A CN 104249090 B CN104249090 B CN 104249090B
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Abstract
The present invention provides a kind of superhigh intensity precision rectangular tube forming method and device, and described method comprises the following steps successively: step one, takes the preforming rectangular tube of Rouno Cormer Pregrinding Wheel radius, by heating tool, its four fillet positions is locally heated to preset temperature；Step 2, will warm up the preforming rectangular tube of preset temperature and carries out first final polishing pass roll bending operation and be rolled into the pre-finishing rectangular tube of small fillet radius；Step 3, carries out pre-finishing rectangular tube second final polishing pass roll bending operation and is rolled into the accurate rectangular tube of nearly wedge angle.Compared with conventional roll roll forming technique, the hot roll bending forming technique of the present invention is absorbed in the application of high strength steel or unimach, has obvious technological precedence advantage and is widely applied scope；Compared with drop stamping, hot roll bending moulding process molding rate is fast, stock utilization is high and processability good；This technique can produce nearly wedge angle rectangular tube and functional.
Description
Technical field
The present invention relates to heat Roller Bend Forming Technique field, local, particularly relate to a kind of superhigh intensity precision rectangle
Pipe forming method and device.
Background technology
For meeting the restriction requirement of the automotive light weight technology of increasingly stringent, collision safety performance and discharge amount of exhaust gas,
In addition to utilizing lightweighting materials such as Al, Mg and polymer, unimach in the automotive industry should
With more and more extensive.Abroad in the manufacture of mainstream automotive vehicle body, substitute regular tenacity with unimach
Steel is a direction of Hyundai Motor parts development.
As a example by automobile main components-rectangular tube, in its main preparation technology, roll bending formation technique has
Having higher forming ability and advantage, its speed of production is fast, low cost, and stock utilization is high, for some
Remaining silent the structural member of shaped steel, roll bending formation technique has the irreplaceable advantage of other techniques.But superelevation is strong
Degree steel yield strength at normal temperatures is high, and required roll bending formation power is relatively big, the forming ability requirement to roll bending equipment
High；Its springback capacity is relatively big, and the dimensional accuracy of product is difficult to ensure that；Its yield tensile ratio is high simultaneously, i.e. molding is interval
Relatively small, the molding of especially accurate rectangular tube small fillet radius, it is easy to produce cracking.So using
Conventional roll roll forming technique produces superhigh intensity precision rectangular tube and almost cannot complete.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of superhigh intensity precision rectangular tube forming method and dress
Put, to solve the problem that the roll bending formation technique of prior art cannot produce superhigh intensity precision rectangular tube.
In order to solve the problems referred to above, the embodiment of the present invention proposes a kind of superhigh intensity precision rectangular tube molding side
Method, comprises the following steps successively:
Step one, takes the preforming rectangular tube of Rouno Cormer Pregrinding Wheel radius, by heating tool to its four fillet positions
Carry out being locally heated to preset temperature；
Step 2, the preforming rectangular tube that will warm up preset temperature carries out first final polishing pass roll bending operation
It is rolled into the pre-finishing rectangular tube of small fillet radius；
Step 3, carries out pre-finishing rectangular tube second final polishing pass roll bending operation and is rolled into the essence of nearly wedge angle
Close rectangular tube.
Wherein, in step one, described preset temperature is 600 DEG C-950 DEG C.
Wherein, described first roll bending machine is than the big 1-5mm in roller footpath of described second roll bending machine.
Wherein, in step one, described heating tool includes that a load coil, described induction coil are circle
Shape is located on the outer border of rectangular tube, and is provided with at four fillet positions of corresponding rectangular tube and leans on to fillet position
Near proximity structure.
For solving above-mentioned technical problem, the embodiment of the present invention also provides for a kind of superhigh intensity precision rectangular tube molding
Device, including spaced first roll bending machine and the second roll bending machine, described first roll bending machine is provided with thermometric
Instrument and automatic feedback system, be provided with induction coil before described first roll bending machine, described induction coil connects respectively
Sensing heating control cabinet and automatic feedback system, described automatic feedback system compares preset temperature and temperature measurer
Temperature is also automatically controlled induction coil heated rectangular tube by sensing heating control cabinet.
Wherein, described induction coil is that round is located on the outer border of rectangular tube, and at four of corresponding rectangular tube
Fillet position is provided with the proximity structure close to fillet position.
Wherein, also include multiple guide roller, in order to rectangular tube to be guided.
Wherein, also include a chiller, after being located at the second roll bending machine, in order to rectangular tube to be carried out cooling fall
Temperature.
Having the beneficial effect that of the technique scheme of the present invention:
(1) compared with conventional roll roll forming technique, the hot roll bending forming technique of the present invention is absorbed in high intensity
Steel or the application of unimach, have obvious technological precedence advantage and be widely applied scope；Rush with heat
Pressure is compared, and hot roll bending moulding process molding rate is fast, stock utilization is high and processability good；Hot-rolling curves
Type technique reduces the requirement to equipment, extends the life-span of equipment.
(2) local induction heating technology of the present invention can not only accurately realize the heating at fillet position, reduces
Residual stress, prevents processing hardening, and has little to no effect remaining mother metal, it is ensured that raw-material intensity；
For entirety heats, locally heating technique firing rate is fast, and the thermal efficiency is high, low cost.
(3) present invention introduces thermal straightening system, Appropriate application waste heat, reduce aligning tension force, eliminate
Turks-head roll in conventional roll roll forming technique, reduces cost, improves product size precision.
Accompanying drawing explanation
Fig. 1 is the structural representation of the superhigh intensity precision rectangular pipe molding device of pipe of the embodiment of the present invention；
Fig. 2 is the right of the preforming rectangular tube of the embodiment of the present invention, pre-finishing rectangular tube and accurate rectangular tube
Than figure；
Fig. 3 is the hot-trimming Levelling principle schematic diagram of the embodiment of the present invention；
Fig. 4 a is the structural representation one of the heating tool of the embodiment of the present invention；
Fig. 4 b is the structural representation two of the heating tool of the embodiment of the present invention.
[main element symbol description]
1: sensing heating control cabinet；
2: the first roll bending machines；
3: rectangular tube；
4: top and bottom rolls and side roller；
5: the second roll bending machines；
6: guide roller；
7: chiller；
8: automatic feedback system；
9: induction coil.
Detailed description of the invention:
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with attached
Figure and specific embodiment are described in detail.
The roll bending formation technique that the present invention is directed to prior art cannot produce asking of superhigh intensity precision rectangular tube
Topic, it is provided that a kind of superhigh intensity precision rectangular tube forming method and device.
As shown in Figure 2, a kind of superhigh intensity precision rectangular tube forming method that the embodiment of the present invention provides,
Comprise the following steps successively:
Step one, is pre-bent to, by hypervelocity steel plate material, the rectangular tube that radius of corner is bigger by traditional cold bending process,
Take the preforming rectangular tube of Rouno Cormer Pregrinding Wheel radius, by heating tool, its four fillet positions are carried out local and heat
To preset temperature, described preset temperature is 600 DEG C-950 DEG C, and described heating tool includes a sensing heater wire
Circle, described induction coil is that round is located on the outer border of rectangular tube, and at four fillet parts of corresponding rectangular tube
The proximity structure close to fillet position it is provided with at Wei；
Step 2, the preforming rectangular tube that will warm up preset temperature carries out first final polishing pass roll bending operation
It is rolled into the pre-finishing rectangular tube of small fillet radius；
Step 3, carries out pre-finishing rectangular tube second final polishing pass roll bending operation and is rolled into the essence of nearly wedge angle
Close rectangular tube；
First roll bending machine of described first final polishing pass roll bending operation and described second final polishing pass roll bending
Second roll bending machine interval of operation is arranged, and described first roll bending machine is bigger than the roller footpath of described second roll bending machine
1-5mm。
As it is shown in figure 1, for solving above-mentioned technical problem, the embodiment of the present invention also provides for a kind of superhigh intensity essence
Close rectangular pipe molding device of pipe, including spaced first roll bending machine 2 and the second roll bending machine 5, described first
Roll bending machine 2 is provided with temperature measurer and automatic feedback system 8, is provided with induction coil before described first roll bending machine 2
9, described induction coil 9 connects sensing heating control cabinet 1 and automatic feedback system respectively, described the most anti-
Feedback system compares preset temperature and the temperature of temperature measurer and automatically controls sensing by sensing heating control cabinet 1
Rectangular tube 3 is heated by coil 9；Also include multiple guide roller 6, in order to rectangular tube 3 to be guided；
Also include a chiller 7, after being located at the second roll bending machine 5, in order to rectangular tube 3 to be cooled.
Described first roll bending machine and the second roll bending machine are all made up of top and bottom rolls and side roller 4.
As shown in figures 4 a and 4b, described induction coil 9 is located on the outer border of rectangular tube 3 in round, and
It is provided with the proximity structure close to fillet position at corresponding 3 four fillet positions of rectangular tube.
The present invention the first frame is that preforming rectangular tube is delivered into induction coil smoothly, prevents preforming square
Shape pipe contacts with induction coil, forms short circuit；Subsequently enter the induction coil refered in particular to, four circles of rectangular tube
Angular position is heated to predetermined temperature, temperature measurer and automatic feedback system ensure the constant of heating-up temperature；
Entering back into finished roll, rectangular tube is by four-way extruding force, and owing to fillet is affected by temperature, surrender is strong
Degree is less than the mother metal of not temperature influence, and extruding force is delivered to corner, and plastic deformation, radius of corner occur
Reduce；Fillet is after large deformation, often by residual stress heterogeneous, cause distortion, lateral bending,
The redundancy deformation such as buckling.As it is shown on figure 3, the invention provides a kind of hot tensile strength straightening system, it is former
Reason is, the speed difference utilizing the difference of the roller footpath between two passages to cause, and produces certain tension force and make between two passages
With, in conjunction with the waste heat after hot-trimming so that be subject at rectangular tube two ends higher than material yield strength, be less than
The hot tensile strength effect of Tensile strength, thus eliminate the redundancy deformation such as the distortion after hot-trimming, warpage.
In the local induction heating system of the present invention, make specific induction coil by oneself by this invention, it is possible to accurate
Really heat four fillet positions of rectangular tube, and it is unaffected to avoid other plane mother metals.It is provided with automatically
Feedback temperature regulation system, this system is passed through temperature measuring set, is caught the Temperature Feedback before molding and add to sensing
Hot systems, if recording temperature in forming temperature interval, then keeps current power；If not existing, rise the most rapidly
High or reduction power regulates applicable forming temperature, thus ensures the constant of heating-up temperature.
Embodiment one
1) ultrahigh-strength steel plates is pre-bent to the preforming rectangular tube of radius of corner R=8, size 40.0 × 40.0
×2.0mm；2) with feed speed 10m/min, preforming rectangular tube fillet position is heated rapidly to 600 DEG C；
3) after hot extrusion, finishing aligning, it is thus achieved that a size of 38.5 × 38.5 × 2.0mm, radius of corner R=4.0
With the accurate rectangular tube that dimensional accuracy is 0.1mm.Through quality testing, the processing hardening of this precision rectangular tube is existing
As alleviating, residual stress reduces, and elongation percentage is improved.
Embodiment 2
1) ultrahigh-strength steel plates is pre-bent to the preforming rectangular tube of radius of corner R=8, size 40.0 × 40.0
×2.0mm；2) with feed speed 15m/min, preforming rectangular tube fillet position is heated rapidly to 650 DEG C；
3) after hot extrusion, finishing aligning, it is thus achieved that a size of 38.0 × 38.0 × 2.0mm, radius of corner R=2.0
With the accurate rectangular tube that dimensional accuracy is 0.1mm.Through quality testing, the processing hardening of this precision rectangular tube is existing
As alleviating, residual stress reduces, and elongation percentage is improved.
Having the beneficial effect that of the technique scheme of the present invention:
(1) compared with conventional roll roll forming technique, the hot roll bending forming technique of the present invention is absorbed in high intensity
Steel or the application of unimach, have obvious technological precedence advantage and be widely applied scope；Rush with heat
Pressure is compared, and hot roll bending moulding process molding rate is fast, stock utilization is high and processability good；Hot-rolling curves
Type technique reduces the requirement to equipment, extends the life-span of equipment.
(2) local induction heating technology of the present invention can not only accurately realize the heating at fillet position, reduces
Residual stress, prevents processing hardening, and has little to no effect remaining mother metal, it is ensured that raw-material intensity；
For entirety heats, locally heating technique firing rate is fast, and the thermal efficiency is high, low cost.
(3) present invention introduces thermal straightening system, Appropriate application waste heat, reduce aligning tension force, eliminate
Turks-head roll in conventional roll roll forming technique, reduces cost, improves product size precision.
The above is the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from principle of the present invention, it is also possible to make some improvements and modifications,
These improvements and modifications also should be regarded as protection scope of the present invention.
Claims (1)
1. a superhigh intensity precision rectangular tube forming method, it is characterised in that comprise the following steps successively:
Step one, takes the preforming rectangular tube of Rouno Cormer Pregrinding Wheel radius, by heating tool to its four fillet positions
Carry out being locally heated to preset temperature；
Step 2, the preforming rectangular tube that will warm up preset temperature carries out first final polishing pass roll bending operation
It is rolled into the pre-finishing rectangular tube of small fillet radius；
Step 3, carries out pre-finishing rectangular tube second final polishing pass roll bending operation and is rolled into the essence of nearly wedge angle
Close rectangular tube；
Wherein, in step one, described preset temperature is 600 DEG C-950 DEG C；
Wherein, the first roll bending machine is than the big 1-5mm in roller footpath of the second roll bending machine；
Wherein, in step one, described heating tool includes that an induction coil, described induction coil are round ring
It is located at the outer border of rectangular tube, and is provided with to fillet position close at four fillet positions of corresponding rectangular tube
Proximity structure；
The superhigh intensity precision rectangular tube molding used in described superhigh intensity precision rectangular tube forming method
Device, described superhigh intensity precision rectangular pipe molding device of pipe, including spaced first roll bending machine and second
Roll bending machine, described first roll bending machine is provided with temperature measurer and automatic feedback system, sets before described first roll bending machine
Having induction coil, described induction coil connects sensing heating control cabinet and automatic feedback system respectively, described from
Motional feedback system compares preset temperature and the temperature of temperature measurer and automatically controls sense by sensing heating control cabinet
Answer coil that rectangular tube is heated；
Wherein, described induction coil is that round is located on the outer border of rectangular tube, and at four of corresponding rectangular tube
Fillet position is provided with the proximity structure close to fillet position；
Wherein, also include multiple guide roller, in order to rectangular tube to be guided；
Wherein, also include a chiller, after being located at the second roll bending machine, in order to rectangular tube to be carried out cooling fall
Temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410477990.8A CN104249090B (en) | 2014-09-18 | 2014-09-18 | A kind of superhigh intensity precision rectangular tube forming method and device |
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| CN201410477990.8A CN104249090B (en) | 2014-09-18 | 2014-09-18 | A kind of superhigh intensity precision rectangular tube forming method and device |
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| CN104249090A CN104249090A (en) | 2014-12-31 |
| CN104249090B true CN104249090B (en) | 2016-12-07 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104971959B (en) * | 2015-07-23 | 2017-03-29 | 上海宝钢型钢有限公司 | A kind of high intensity opening-closed sectional material hot roll bending forming technology |
| CN105107866A (en) * | 2015-07-23 | 2015-12-02 | 上海宝钢型钢有限公司 | Thermal shaping method and device of high-strength sharp-corner square rectangular tube |
| CN106270218B (en) * | 2016-11-01 | 2018-04-17 | 哈尔滨工业大学（威海） | A kind of online controllable continuous based on Multi-sensor Fusion hinders method for heating and controlling certainly |
| CN107185997B (en) * | 2017-07-05 | 2019-09-17 | 宁波钜智自动化装备有限公司 | A kind of multiple-axis servo control high-precision ERW skelper structure |
| CN108607880A (en) * | 2018-05-18 | 2018-10-02 | 石家庄轴设机电设备有限公司 | Square rectangle wedge angle pipe hot forming production line |
| CN110726064A (en) * | 2018-07-17 | 2020-01-24 | 欣诺冷弯型钢产业研究院（曹妃甸）有限公司 | Corner thickened cold-hot composite molded square rectangular steel pipe and preparation method thereof |
| CN110722015A (en) * | 2018-07-17 | 2020-01-24 | 欣诺冷弯型钢产业研究院（曹妃甸）有限公司 | Cold and hot composite forming square and rectangular pipe forming system with thickened corners |
| CN110000239A (en) * | 2019-04-09 | 2019-07-12 | 天津天重中直科技工程有限公司 | A kind of novel circle change side's shaping machine set |
| CN113118230B (en) * | 2021-04-21 | 2023-05-12 | 中冶赛迪技术研究中心有限公司 | Composite technology for producing closed section steel through hot roll bending |
| CN114798818B (en) * | 2022-04-02 | 2023-09-08 | 江苏赐瑞金属制品有限公司 | Automatic straightener and automatic straightening method for galvanized square pipes |
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| JPH0475716A (en) * | 1990-07-19 | 1992-03-10 | Kawasaki Steel Corp | Device for manufacturing square steel tube |
| JPH07314047A (en) * | 1994-05-20 | 1995-12-05 | Kawasaki Steel Corp | Production of square steel tube |
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| CN101102857A (en) * | 2004-11-26 | 2008-01-09 | 株式会社中田制作所 | Roll for molding square tube and method and device for rollingly molding square tube |
| CN2917854Y (en) * | 2005-05-12 | 2007-07-04 | 张挺胜 | Major diameter steel pipe and section steel bending roll machine |
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