CN102528210A - Torch-flame cutting process for super-thick steel plates - Google Patents
Torch-flame cutting process for super-thick steel plates Download PDFInfo
- Publication number
- CN102528210A CN102528210A CN2011104548524A CN201110454852A CN102528210A CN 102528210 A CN102528210 A CN 102528210A CN 2011104548524 A CN2011104548524 A CN 2011104548524A CN 201110454852 A CN201110454852 A CN 201110454852A CN 102528210 A CN102528210 A CN 102528210A
- Authority
- CN
- China
- Prior art keywords
- cutting
- flame
- steel plate
- cut
- torch
- 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.)
- Pending
Links
Landscapes
- Arc Welding In General (AREA)
Abstract
The invention discloses a torch-flame cutting process for super-thick steel plates, which includes steps of utilizing a numerical-control torch-flame cutting machine for torch-flame cutting of the super-thick steel plates, placing a to-be-cut steel plate on the numerical-control torch-flame cutting machine while keeping the surface of the to-be-cut steel plate perpendicular to a cutting torch of the numerical-control torch-flame cutting machine and keeping the distance from the cutting torch to the surfaces of the to-be-cut steel plates ranging from 10mm to 30mm; setting cutting speed, preheating time, preheating oxygen pressure, cutting oxygen pressure and dimethylmethane pressure of the numerical-control torch-flame cutting machine; regulating flame strength of the cutting torch by utilizing the right-angle position formed between the surface of the to-be-cut steel plate and the lateral side thereof as an initial cutting point, enabling the secondary flame to be longer enough to reach the bottom of the to-be-cut steel plate, preheating the initial cutting point for a preset preheating time before initial cutting, and then turning on cutting oxygen, moving the cutting torch forwards when slag flows downwards along edges, and finally increasing moving speed of the cutting torch when the slag is discharged from the bottom until completing the normal cutting operation. The torch-flame cutting process for the super-thick steel plates is capable of guaranteeing quality of cut surfaces, is simple and stable, is safe in use and meets production requirements.
Description
Technical field
The invention belongs to flame cutting technique field, especially relate to a kind of super-thick steel plate Flame-cutter skill.
Background technology
For a long time, the cut quality of steel plate flame cutting is difficult to control, even the situation of not passing through occurs cutting.At present, large-sized mining grinding mill end flange generally adopts the steel plate die mould; Steel plate thickness during the flame cutting stock, is rule of thumb set cutting parameter more than 350mm; Cause cut surface roughness, perpendicularity seriously overproof, the cut surface perpendicularity is greater than 10mm, even surpasses 20mm; Cut quality can't guarantee, influences the flange die mould; The method of taking is built-up welding on cut surface, and workload is very big, has increased production cost, brings loss to a certain degree for the production of enterprise, has a strong impact on productivity effect.
Summary of the invention
For addressing the above problem, the purpose of this invention is to provide a kind of super-thick steel plate Flame-cutter skill, can cutting thickness be the super-thick steel plate of 200～600mm, and can guarantee the steel plate quality of cut face.
For realizing the foregoing invention purpose, the present invention adopts following technical scheme:
A kind of super-thick steel plate Flame-cutter skill, it adopts NC flame cutting machine that super-thick steel plate is carried out the flame cutting; Steel plate to be cut is placed on the NC flame cutting machine, and it is vertical that surface of steel plate to be cut and cutting of NC flame cutting machine are chewed, and cutting the height of chewing distance surface of steel plate to be cut is 10～30mm; Set cutting speed, preheating time, preheat oxygen pressure, cutting oxygen pressure and propane pressure in the NC flame cutting machine; Cutting speed increases with steel plate gauge to be cut and reduces; Cutting speed is 200～60mm/min, and be 40s～80s preheating time, and preheat oxygen pressure is 0.3～0.6Mpa; Cutting oxygen pressure is 1～1.6Mpa, and propane pressure is 0.1～0.16Mpa; Meet at right angles the place as playing cutpoint with surface of steel plate to be cut and side, and adjustment is cut and is chewed flame intensity, makes the length of secondary flame reach steel plate to be cut bottom; Rise cut before in the cut point preheating, reach the preheating time of setting after, open cutting oxygen; When treating that slag trickles along the edge downwards; The cutting torch that moves forward, when slag when discharge the bottom, accelerate the cutting torch translational speed to normal cutting operation.
In the above-mentioned super-thick steel plate Flame-cutter skill, when cutting, carry out machine drilling at a place of cutting from steel plate to be cut is inner.
Observe flame and steel plate to be cut variation during cutting, cut surface top groove occurs and adheres to slag, and the bottom produces indent, drags behind the flame, and does not cut off the bottom, explains that oxygen pressure is not enough or cutting speed is too fast; Cutting speed is too slow, causes the cutting shoulder fusing, occurs breach on the cut surface; Oxygen pressure is too high, and the otch bottom is broadened, and continuous breach possibly occur; Therefore, cutting parameter decision cut quality, the present invention obtains the cut quality of high-quality through the rational cutting technique parameter of adjustment.
Because adopt aforesaid technical scheme, the present invention has following superiority:
This super-thick steel plate Flame-cutter skill, it can guarantee 200～600mm super-thick steel plate is cut off through selecting rational cutting technique parameter; And assurance quality of cut face; Guarantee the cut surface perpendicularity at 5～10mm, roughness Ra reaches 50 microns, reaches quality requirement; Cutting process is simple, stable, safe in utilization, satisfies production requirement.
This super-thick steel plate Flame-cutter skill, the difficult problem that it has solved the cutting of large-sized mining grinding mill end flange special heavy plate flame does not need after the super-thick steel plate blanking to reprocess again, and the time and labour saving has reduced production cost, has improved operating efficiency.
The specific embodiment
Through embodiment technical scheme of the present invention is done further explain below.
Embodiment one
It is that 250mm, material are the steel plate of Q345A that steel plate to be cut is selected thickness for use, cuts into the test block that width is 550mm.
Test block is erected, and 550mm begins to carry out the flame cutting as cutting thickness; Test block is placed on the NC flame cutting machine; It is vertical that test block surface and cutting of NC flame cutting machine are chewed, and cutting the height of chewing apart from surface of steel plate to be cut is 28mm, and the cutting speed in the setting NC flame cutting machine is 60mm/min; Be 80 seconds preheating time; Preheat oxygen pressure is 0.55MPa, and cutting oxygen pressure is 1.3MPa, and propane pressure is 0.15MPa; Meet at right angles the place as playing cutpoint with test block surface and side, and adjustment is cut and is chewed flame intensity, makes the length of secondary flame reach steel plate to be cut bottom; Rise cut before in the cut point preheating, reach the preheating time of setting, when workpiece is heated to Chinese red along thickness; Slowly open cutting oxygen, when treating that slag trickles along the edge downwards, cutting torch slowly moves forward; When slag when discharge the bottom, accelerate the cutting torch translational speed to normal cutting operation.Cutting back cut surface roughness Ra reaches 50 microns, does not have obvious groove, and perpendicularity is 10mm.
Embodiment two
It is that 250mm, material are the steel plate of Q345A that steel plate to be cut is selected thickness for use, cuts into the test block that width is 600mm.
Test block is erected, and 600mm begins to carry out the flame cutting as cutting thickness; Test block is placed on the NC flame cutting machine; It is vertical that test block surface and cutting of NC flame cutting machine are chewed, and cutting the height of chewing apart from surface of steel plate to be cut is 28mm, and the cutting speed in the setting NC flame cutting machine is 60mm/min; Be 80 seconds preheating time; Preheat oxygen pressure is 0.6MPa, and cutting oxygen pressure is 1.5MPa, and propane pressure is 0.16MPa; According to carrying out cutting operation with embodiment one identical operations.Cutting back cut surface roughness Ra reaches 50 microns, does not have obvious groove, and perpendicularity is 10mm.
Embodiment three
It is that 250mm, material are the steel plate of Q345A that steel plate to be cut is selected thickness for use, cuts into the test block that width is 450mm.
Test block is erected, and 450mm begins to carry out the flame cutting as cutting thickness; Test block is placed on the NC flame cutting machine; It is vertical that test block surface and cutting of NC flame cutting machine are chewed, and cutting the height of chewing apart from surface of steel plate to be cut is 25mm, and the cutting speed in the setting NC flame cutting machine is 70mm/min; Be 70 seconds preheating time; Preheat oxygen pressure is 0.5MPa, and cutting oxygen pressure is 1.2MPa, and propane pressure is 0.12MPa; According to carrying out cutting operation with embodiment one identical operations.Cutting back cut surface roughness Ra reaches 50 microns, does not have obvious groove, and perpendicularity is 8mm.
The present invention is not limited to above-mentioned embodiment, and any those of ordinary skill in the art are in the technical scope that the present invention discloses, and various changes and the distortion done all should be encompassed in protection scope of the present invention.
Claims (2)
1. a super-thick steel plate Flame-cutter is planted, and it is characterized in that: it adopts NC flame cutting machine that super-thick steel plate is carried out the flame cutting; Steel plate to be cut is placed on the NC flame cutting machine, and it is vertical that surface of steel plate to be cut and cutting of NC flame cutting machine are chewed, and cutting the height of chewing distance surface of steel plate to be cut is 10～30mm; Set cutting speed, preheating time, preheat oxygen pressure, cutting oxygen pressure and propane pressure in the NC flame cutting machine; Cutting speed increases with steel plate gauge to be cut and reduces; Cutting speed is 200～60mm/min, and be 40s～80s preheating time, and preheat oxygen pressure is 0.3～0.6Mpa; Cutting oxygen pressure is 1～1.6Mpa, and propane pressure is 0.1～0.16Mpa; Meet at right angles the place as playing cutpoint with surface of steel plate to be cut and side, and adjustment is cut and is chewed flame intensity, makes the length of secondary flame reach steel plate to be cut bottom; Rise cut before in the cut point preheating, reach the preheating time of setting after, open cutting oxygen; When treating that slag trickles along the edge downwards; The cutting torch that moves forward, when slag when discharge the bottom, accelerate the cutting torch translational speed to normal cutting operation.
2. super-thick steel plate Flame-cutter skill according to claim 1 is characterized in that: when cutting from steel plate to be cut is inner, carry out machine drilling at a place of cutting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104548524A CN102528210A (en) | 2011-12-30 | 2011-12-30 | Torch-flame cutting process for super-thick steel plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104548524A CN102528210A (en) | 2011-12-30 | 2011-12-30 | Torch-flame cutting process for super-thick steel plates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102528210A true CN102528210A (en) | 2012-07-04 |
Family
ID=46336917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104548524A Pending CN102528210A (en) | 2011-12-30 | 2011-12-30 | Torch-flame cutting process for super-thick steel plates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102528210A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102922079A (en) * | 2012-10-23 | 2013-02-13 | 秦皇岛首秦金属材料有限公司 | Method for quick opening large-chamfer casting blank during cutting |
| CN103170704A (en) * | 2013-03-16 | 2013-06-26 | 南阳汉冶特钢有限公司 | Flame cutting process of steel plate of extremely thick medium and high carbon steel and alloy steel |
| CN103394791A (en) * | 2013-08-06 | 2013-11-20 | 武汉钢铁(集团)公司 | Method and device for gradually removing continuous casting billet cutting knobs |
| CN105252104A (en) * | 2015-11-18 | 2016-01-20 | 辽宁石油化工大学 | Flame cutting method of steel plate |
| CN105834548A (en) * | 2016-06-07 | 2016-08-10 | 南京钢铁股份有限公司 | Flame cutting technology for thick steel plates |
| CN106312238A (en) * | 2016-08-31 | 2017-01-11 | 安徽景隆金属材料有限公司 | Flame cutting method for thick steel plate |
| CN106808055A (en) * | 2017-03-08 | 2017-06-09 | 袁会忠 | A kind of method that numerical control cutting machine saves fuel gas |
| CN108480818A (en) * | 2018-03-26 | 2018-09-04 | 四川汇源钢建装配建筑有限公司 | A kind of flame cutting method and steel part of ultra-thick steel plates |
| CN108655532A (en) * | 2017-03-30 | 2018-10-16 | 中国石油天然气股份有限公司 | Cutting method of chromium-molybdenum stainless steel composite layer |
| CN109277543A (en) * | 2018-11-12 | 2019-01-29 | 四川德胜集团钒钛有限公司 | A kind of high-vandium steel continuous casting flame cutting technique |
| CN110369828A (en) * | 2019-07-31 | 2019-10-25 | 中冶(上海)钢结构科技有限公司 | The flame of ultra-thick plate cuts hole method |
| CN110560833A (en) * | 2019-10-22 | 2019-12-13 | 中国一冶集团有限公司 | Method for processing flame cutting transition groove |
| CN111761162A (en) * | 2020-06-29 | 2020-10-13 | 马鞍山钢铁股份有限公司 | Flame cutting process for reducing depth of cutting heat affected zone of H-shaped steel web |
| CN112404646A (en) * | 2020-11-05 | 2021-02-26 | 防城港中一重工有限公司 | Method for quickly cutting thick plate bolt hole |
| CN113210794A (en) * | 2020-01-21 | 2021-08-06 | 中国石油天然气股份有限公司 | Hole opening method |
| CN114682876A (en) * | 2022-02-25 | 2022-07-01 | 舞阳钢铁有限责任公司 | Production method for improving cutting quality of large-thickness alloy steel plate |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0129952A1 (en) * | 1983-06-22 | 1985-01-02 | Victor Equipment Company | Method and apparatus for cutting metal plate |
| JPS6434579U (en) * | 1987-08-26 | 1989-03-02 | ||
| JP2000343216A (en) * | 1999-06-08 | 2000-12-12 | Nkk Corp | Flame scarfing method |
| CN101112729A (en) * | 2006-07-27 | 2008-01-30 | 攀枝花新钢钒股份有限公司 | Continuous casting billet cutting technics |
| CN101468418A (en) * | 2007-12-28 | 2009-07-01 | 中国北车集团大同电力机车有限责任公司 | Method for cutting workpiece by numerical control cutting machine |
| CN101823175A (en) * | 2010-04-30 | 2010-09-08 | 武汉一冶钢结构有限责任公司 | Improved semiautomatic flame cutting machine |
| CN102259225A (en) * | 2010-05-24 | 2011-11-30 | 淮南舜立机械有限责任公司 | Flame cutting technology and flame cutting positioning device |
-
2011
- 2011-12-30 CN CN2011104548524A patent/CN102528210A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0129952A1 (en) * | 1983-06-22 | 1985-01-02 | Victor Equipment Company | Method and apparatus for cutting metal plate |
| JPS6434579U (en) * | 1987-08-26 | 1989-03-02 | ||
| JP2000343216A (en) * | 1999-06-08 | 2000-12-12 | Nkk Corp | Flame scarfing method |
| CN101112729A (en) * | 2006-07-27 | 2008-01-30 | 攀枝花新钢钒股份有限公司 | Continuous casting billet cutting technics |
| CN101468418A (en) * | 2007-12-28 | 2009-07-01 | 中国北车集团大同电力机车有限责任公司 | Method for cutting workpiece by numerical control cutting machine |
| CN101823175A (en) * | 2010-04-30 | 2010-09-08 | 武汉一冶钢结构有限责任公司 | Improved semiautomatic flame cutting machine |
| CN102259225A (en) * | 2010-05-24 | 2011-11-30 | 淮南舜立机械有限责任公司 | Flame cutting technology and flame cutting positioning device |
Non-Patent Citations (2)
| Title |
|---|
| 孙凌翔等: "提高数控火焰切割机切割质量", 《电焊机》, vol. 37, no. 02, 28 February 2007 (2007-02-28), pages 74 - 75 * |
| 王爱珍等: "《钣金技术手册》", 31 December 2006, article "气体切割" * |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102922079B (en) * | 2012-10-23 | 2014-08-27 | 秦皇岛首秦金属材料有限公司 | Method for quick opening large-chamfer casting blank during cutting |
| CN102922079A (en) * | 2012-10-23 | 2013-02-13 | 秦皇岛首秦金属材料有限公司 | Method for quick opening large-chamfer casting blank during cutting |
| CN103170704A (en) * | 2013-03-16 | 2013-06-26 | 南阳汉冶特钢有限公司 | Flame cutting process of steel plate of extremely thick medium and high carbon steel and alloy steel |
| CN103394791A (en) * | 2013-08-06 | 2013-11-20 | 武汉钢铁(集团)公司 | Method and device for gradually removing continuous casting billet cutting knobs |
| CN103394791B (en) * | 2013-08-06 | 2015-12-02 | 武汉钢铁(集团)公司 | The method of successive elimination continuous casting square billet cutting knurl and device thereof |
| CN105252104A (en) * | 2015-11-18 | 2016-01-20 | 辽宁石油化工大学 | Flame cutting method of steel plate |
| CN105834548A (en) * | 2016-06-07 | 2016-08-10 | 南京钢铁股份有限公司 | Flame cutting technology for thick steel plates |
| CN105834548B (en) * | 2016-06-07 | 2018-02-02 | 南京钢铁股份有限公司 | A kind of gas flame cuttiug technique of steel plate |
| CN106312238A (en) * | 2016-08-31 | 2017-01-11 | 安徽景隆金属材料有限公司 | Flame cutting method for thick steel plate |
| CN106312238B (en) * | 2016-08-31 | 2018-10-02 | 安徽景隆金属材料有限公司 | A kind of steel plate flame cutting method |
| CN106808055A (en) * | 2017-03-08 | 2017-06-09 | 袁会忠 | A kind of method that numerical control cutting machine saves fuel gas |
| CN108655532A (en) * | 2017-03-30 | 2018-10-16 | 中国石油天然气股份有限公司 | Cutting method of chromium-molybdenum stainless steel composite layer |
| CN108480818A (en) * | 2018-03-26 | 2018-09-04 | 四川汇源钢建装配建筑有限公司 | A kind of flame cutting method and steel part of ultra-thick steel plates |
| CN109277543A (en) * | 2018-11-12 | 2019-01-29 | 四川德胜集团钒钛有限公司 | A kind of high-vandium steel continuous casting flame cutting technique |
| CN110369828A (en) * | 2019-07-31 | 2019-10-25 | 中冶(上海)钢结构科技有限公司 | The flame of ultra-thick plate cuts hole method |
| CN110560833A (en) * | 2019-10-22 | 2019-12-13 | 中国一冶集团有限公司 | Method for processing flame cutting transition groove |
| CN110560833B (en) * | 2019-10-22 | 2021-08-13 | 中国一冶集团有限公司 | Method for processing flame cutting transition groove |
| CN113210794A (en) * | 2020-01-21 | 2021-08-06 | 中国石油天然气股份有限公司 | Hole opening method |
| CN111761162A (en) * | 2020-06-29 | 2020-10-13 | 马鞍山钢铁股份有限公司 | Flame cutting process for reducing depth of cutting heat affected zone of H-shaped steel web |
| CN112404646A (en) * | 2020-11-05 | 2021-02-26 | 防城港中一重工有限公司 | Method for quickly cutting thick plate bolt hole |
| CN114682876A (en) * | 2022-02-25 | 2022-07-01 | 舞阳钢铁有限责任公司 | Production method for improving cutting quality of large-thickness alloy steel plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102528210A (en) | Torch-flame cutting process for super-thick steel plates | |
| CN104668709A (en) | Process for cutting thick steel plate | |
| CN103635438A (en) | Method for cutting and separating plate glass | |
| US20100176096A1 (en) | Plasma Cutting Method And Plasma Cutting Apparatus | |
| CN105728886A (en) | Flame cutting technology | |
| CN105710484A (en) | Flame cutting process | |
| CN105710497A (en) | Splicing technology of H-shaped steel | |
| CN103273177A (en) | Double-TIG (tungsten inert gas) welding system for thick plates and welding method implemented by double-TIG welding system | |
| CN108655532B (en) | Cutting method of chromium-molybdenum stainless steel composite layer | |
| US9782849B2 (en) | Scarfing machine for scarfing hot and cold workpieces made of steel, such as slabs, blocks and billets | |
| CN107790656A (en) | Method for preventing center cut notch during hot cutting of continuous casting slab | |
| JP2017144459A (en) | Plasma coordination cutting method and cutting apparatus of the same | |
| CN105562882A (en) | Method for cutting and discharging of box column web | |
| CN104668710A (en) | Process for cutting thick steel plate | |
| CN205147537U (en) | A gas cutting device for steel ring cutting | |
| CN105728887A (en) | Cutting technology for steel plates | |
| JP2011235291A (en) | Laser cutting method | |
| CN103056486B (en) | Numerical control surfacing process applied to TBM (tunnel boring machine) cutters | |
| KR101220716B1 (en) | apparatus for trimming th e welding part in flash butt welder | |
| KR101586394B1 (en) | Cutting Apparatus | |
| CN105750713A (en) | Low-carbon steel submerged-arc welding technology | |
| CN110756946A (en) | Cutting method for thick plate | |
| CN110653467A (en) | Method for straight seam welding of air conditioner compressor shell | |
| CN106563871A (en) | Method for controlling deformation of manual metal arc welding | |
| CN210878124U (en) | Angle-controllable prestressed steel bar chamfering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |