CN104711407B - The anti-breaking cracking method of high-strength steel sheet rolling-line - Google Patents
The anti-breaking cracking method of high-strength steel sheet rolling-line Download PDFInfo
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- CN104711407B CN104711407B CN201310688885.4A CN201310688885A CN104711407B CN 104711407 B CN104711407 B CN 104711407B CN 201310688885 A CN201310688885 A CN 201310688885A CN 104711407 B CN104711407 B CN 104711407B
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- steel sheet
- strength steel
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Abstract
The invention discloses a kind of anti-breaking cracking method of high-strength steel sheet rolling-line, region of stress concentration is formed including heat treated is carried out to high-strength steel sheet, the anti-breaking cracking method of high-strength steel sheet rolling-line of the present invention, region of stress concentration is machined with high-strength steel sheet, stress concentration can be made to act on filling position and region of stress concentration distribution, prevent high-strength steel sheet filling position from fracture occurring, it is ensured that working (machining) efficiency, it is to avoid waste of material.
Description
Technical field
The present invention relates to a kind of high-strength steel sheet rolling process, more particularly to a kind of anti-fracture side of high-strength steel sheet rolling-line
Method.
Background technology
Rolling forming process is that coiled strip plasticity is moved rolling and processing into the technique of product using roll squeezer, and roll-in deformation is
Linear contact lay, required deformation force are less, and rolling-line is to combine continuously to carry out roll-in step by step to coiled strip by multiple roll squeezers
Molding, can be used to process the variously-shaped complicated product such as automobile front protecting crossbeam, in prior art, in order to crossbeam is protected before improving
Structural strength, is typically processed by material of high-strength steel sheet, and the head end of latter coiled strip is fixedly welded on previous coiled strip
Tail end, form continuous coiled strip structure, with the seriality for ensureing to process, but the intensity of filling position is slightly lower, forms stress collection
Midpoint, when filling position is moved between amputation knife and roller arc wheel, easily ruptures in the presence of feeding pulling force, once and occur disconnected
Split, then need the material returned again, splicing, debugging, debugging needs 4-5 hours again every time, condemned MAT'L 40-50, affect life
Efficiency is produced, increases production cost.
Therefore, to solve the above problems, a kind of anti-breaking cracking method of high-strength steel sheet rolling-line is needed, high-strength steel sheet is prevented
Fracture in filling position, it is ensured that working (machining) efficiency, it is to avoid waste of material there is.
The content of the invention
In view of this, it is an object of the invention to provide a kind of anti-breaking cracking method of high-strength steel sheet rolling-line, is prevented from height
Fracture in strength steel sheet filling position, it is ensured that working (machining) efficiency, it is to avoid waste of material there is.
The anti-breaking cracking method of high-strength steel sheet rolling-line of the present invention, should including heat treated formation is carried out to high-strength steel sheet
Power concentrated area；
Further, the region of stress concentration includes extending laterally along high-strength steel sheet and along high-strength steel sheet longitudinal arrangement
Multiple bar shapeds extending stress band；
Further, a stress concentration near high-strength steel sheet filling position take to the distance between filling position and
The distance between adjacent two extending stress band is 30-70mm；
Further, the region of stress concentration is located on front side of high-strength steel sheet filling position along feed direction；
Further, the method for the heat treated is high-strength steel sheet to be burnt using argon arc welding；
Further, temperature is burnt during the heat treated for 700-1000 DEG C；
Further, the time is burnt during the heat treated for 10-60s.
The invention has the beneficial effects as follows：The anti-breaking cracking method of high-strength steel sheet rolling-line of the present invention, on high-strength steel sheet
Region of stress concentration is machined with, stress concentration can be made to act on filling position and region of stress concentration distribution, high strength steel is prevented
Fracture in plate filling position, it is ensured that working (machining) efficiency, it is to avoid waste of material there is.
Specific embodiment
The anti-breaking cracking method of high-strength steel sheet rolling-line of the present embodiment, forms including heat treated is carried out to high-strength steel sheet
Region of stress concentration, the region of stress concentration and filling position along high-strength steel sheet length to being set up in parallel, when roll-in is processed, in order to
Ensure the seriality of processing, latter coiled strip head end is generally fixedly welded on the tail end of previous coiled strip, form continuous coiled strip knot
Structure, two coiled strip junctions are filling position, and the positional structure intensity is slightly lower compared with coiled strip other positions intensity, therefore the shape in feeding
Into stress concentration position, easily rupture, by the machining stress concentrated area on high-strength steel sheet, act on can stress concentration
It is distributed in filling position and region of stress concentration, while certain benefit can be provided when region of stress concentration is to high-strength steel sheet tension
The amount of repaying, resists feeding pulling force effect by along the long extension certain to generation, prevents high-strength steel sheet filling position from occurring disconnected
Split, it is ensured that working (machining) efficiency, it is to avoid waste of material.
In the present embodiment, the region of stress concentration includes extending laterally along high-strength steel sheet and along high-strength steel sheet longitudinal direction
The extending stress band of multiple bar shapeds of arrangement, makes that stress concentration acts on filling position and each extending stress band is uniformly distributed, and enters
One step reduces stress concentration effect everywhere, and the compensation dosage that multiple extending stress bands are provided is larger, can effectively prevent high-strength steel sheet
Fracture.
In the present embodiment, a stress concentration near high-strength steel sheet filling position takes the distance between filling position to
And the distance between adjacent two extending stress band is 30-70mm, preferably 50mm, filling position is easiest in rolling-line
Rupture between amputation knife and roller arc wheel, the present embodiment can guarantee that at least part of extending stress band is in amputation knife together with filling position
And roller arc wheel between, can reliably prevent high-strength steel sheet from rupturing.
In the present embodiment, the region of stress concentration is along feed direction on front side of high-strength steel sheet filling position；Making should
Power concentrates band to be introduced between rolling-line amputation knife and roller arc wheel, and then filling position is entered, and acts on stress concentration and respectively should
Power concentrates band and filling position to be uniformly distributed, and improves anti-fracture reliability.
In the present embodiment, the method for the heat treated is high-strength steel sheet to be burnt using argon arc welding, is easy to reality
Apply, low cost, of short duration shutdown during heat treated, the impact to working (machining) efficiency are less.
In the present embodiment, temperature is burnt during the heat treated for 700-1000 DEG C, has the extending stress band of generation
Certain toughness, can be in high-strength steel sheet length to offer compensation dosage.
In the present embodiment, the time of burning during the heat treated is 10-60s, extending stress band is produced certain
Stress concentration is acted on, and is unlikely to again to be pulled off, moreover it is possible to provide certain compensation dosage, and combination property is preferable.
Claims (3)
1. the anti-breaking cracking method of a kind of high-strength steel sheet rolling-line, it is characterised in that：Heat treated is carried out including to high-strength steel sheet
Region of stress concentration is formed, the region of stress concentration includes extending laterally along high-strength steel sheet and longitudinally arranges along high-strength steel sheet
The extending stress band of multiple bar shapeds of row, a stress concentration near high-strength steel sheet filling position are taken between filling position
Distance and the distance between adjacent two extending stress band be 30-70mm, the method for the heat treated is to adopt argon arc
Weldering carries out burning 10-60s to high-strength steel sheet.
2. the anti-breaking cracking method of high-strength steel sheet rolling-line according to claim 1, it is characterised in that：The stress concentration
Region is along feed direction on front side of high-strength steel sheet filling position.
3. the anti-breaking cracking method of high-strength steel sheet rolling-line according to claim 1, it is characterised in that：The heat treated
When burn temperature for 700-1000 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310688885.4A CN104711407B (en) | 2013-12-16 | 2013-12-16 | The anti-breaking cracking method of high-strength steel sheet rolling-line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310688885.4A CN104711407B (en) | 2013-12-16 | 2013-12-16 | The anti-breaking cracking method of high-strength steel sheet rolling-line |
Publications (2)
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| CN104711407A CN104711407A (en) | 2015-06-17 |
| CN104711407B true CN104711407B (en) | 2017-04-05 |
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| CN201310688885.4A Active CN104711407B (en) | 2013-12-16 | 2013-12-16 | The anti-breaking cracking method of high-strength steel sheet rolling-line |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106053752B (en) * | 2016-05-25 | 2017-12-19 | 华东理工大学 | The anti-fracture design method of nickel-base high-temperature fastener |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101018626A (en) * | 2005-02-25 | 2007-08-15 | 杰富意钢铁株式会社 | Pressing forming device and pressing forming method for metal plate |
| CN101676415A (en) * | 2008-09-15 | 2010-03-24 | 蒂森克虏伯钢铁股份公司 | Hot-formed profile |
| CN103228392A (en) * | 2010-09-16 | 2013-07-31 | 新日铁住金株式会社 | Molded member and manufacturing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009241116A (en) * | 2008-03-31 | 2009-10-22 | Tokyu Car Corp | Welding method of metallic material and joined body of metallic material |
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2013
- 2013-12-16 CN CN201310688885.4A patent/CN104711407B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101018626A (en) * | 2005-02-25 | 2007-08-15 | 杰富意钢铁株式会社 | Pressing forming device and pressing forming method for metal plate |
| CN101676415A (en) * | 2008-09-15 | 2010-03-24 | 蒂森克虏伯钢铁股份公司 | Hot-formed profile |
| CN103228392A (en) * | 2010-09-16 | 2013-07-31 | 新日铁住金株式会社 | Molded member and manufacturing method thereof |
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| CN104711407A (en) | 2015-06-17 |
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