CN112045158A - Method for preventing continuous casting plate blank from bending and deforming after cutting - Google Patents
Method for preventing continuous casting plate blank from bending and deforming after cutting Download PDFInfo
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- CN112045158A CN112045158A CN202010941716.7A CN202010941716A CN112045158A CN 112045158 A CN112045158 A CN 112045158A CN 202010941716 A CN202010941716 A CN 202010941716A CN 112045158 A CN112045158 A CN 112045158A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/126—Accessories for subsequent treating or working cast stock in situ for cutting
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Abstract
The invention discloses a method for preventing continuous casting plate blank from bending and deforming after cutting, wherein a cutting tool comprises a steel blank support, an upright post, a cutting track, a cutting trolley and a screw rod, the steel blank support is supported at the bottom of the continuous casting plate blank to be cut, the cutting track is arranged above the steel blank support, the cutting trolley runs on the cutting track, the upright post is fixed on the steel blank support and symmetrically arranged at two sides of the continuous casting plate blank to be cut, a through hole is formed in the upright post, a nut is fixed in the through hole, and the screw rod is in threaded connection with the nut. Compared with the prior art, the invention solves or partially solves the technical problems that the cut billet is seriously bent after being cut and the standard reaching rate of the bending degree is low, so that the charging and hot rolling of the billet are influenced by the existing cutting method.
Description
Technical Field
The invention relates to the field of continuous casting slab cutting, in particular to a method for preventing bending deformation of a continuous casting slab after cutting.
Background
Because some wire products have special requirements on the internal quality and the surface quality of the continuous casting billet, the production process route of rolling the square billet of the wire product is a thin plate continuous casting billet produced by a slab caster, the cold continuous casting slab is longitudinally cut by a flame cutting machine to obtain a plurality of small square billets under the wire, and then the small square billets are rolled by a wire mill to produce the wire product.
The continuous casting plate blank is longitudinally cut into a plurality of square blanks by melting steel to form gaps by utilizing the flame temperature of a flame gun and the temperature that the combustion temperature of oxygen and iron is higher than the melting point of the steel, so that the square blanks are cut. And sequentially carrying out multiple longitudinal cutting from one side of the plate blank to obtain a plurality of small square blanks. In the cutting process, along with the slow operation of flame cutting rifle, the steel billet all changes along length and width direction temperature, leads to the steel billet to differ along width direction inflation degree in heating and cooling process, and the square billet after the cutting leads to bending deformation because of being heated the inequality. Particularly, the saddle steel factory is in the north, the temperature difference between day and night is large, the temperature difference between winter and summer is large, and the temperature influence is serious. The coil rod yield is extremely low because the number of the square billets which are required to be rejected when the bending degree exceeds the standard is large. Therefore, the flatness of the cut square billet is improved, and the problem of bending deformation of the cut square billet is reduced to become the bottleneck problem of the plate blank cutting process.
Patent document No. CN201210473946.0 discloses a slab cutting device, including flame gun and the support that is used for installing the flame gun, through extending a plurality of flame guns cooperation slab binding clasp of oblique line evenly arranged in the roll table top, vertically cut the slab, improved production efficiency, reduced energy resource consumption. However, this device has the following problems: 1. although the production efficiency can be improved by simultaneously cutting the plate blank by the plurality of flame guns, the requirement on the pressure of cutting gas is quite high, the pressure of the cutting gas is slightly insufficient or fluctuates, the condition that individual flame is extinguished or cutting is not tight can occur, the influence on the surface quality of the cut blank is large, and the pressure for later-stage manual finishing is also large; 2. because the longitudinal length of the slab is far greater than the width of the slab, although the flame cutting guns are uniformly arranged in an oblique line, the bending deformation caused by local thermal expansion of the billet in the cutting process cannot be avoided; 3. the slab clamp is arranged to limit the slab from deviating from the rail during the cutting process, while the heating and re-cooling of the cut slab are slow processes, and the slab clamp cannot resist the slab from bending along the longitudinal direction due to uneven heating during the cooling process.
Disclosure of Invention
The invention aims to provide a method for preventing a continuous casting plate blank from bending and deforming after cutting, and solves or partially solves the technical problems that the cut blank is seriously bent and has low standard bending rate and the charging and hot rolling of a square blank are influenced in the conventional cutting method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preventing bending deformation of a continuous casting slab after cutting comprises the following steps:
1) firstly, assembling a cutting tool, wherein the cutting tool comprises a billet support, an upright post, a cutting track, a cutting trolley and a screw rod, the billet support is supported at the bottom of a continuous casting slab to be cut, the cutting track is arranged above the billet support, the cutting trolley runs on the cutting track, the upright post is fixed on the billet support and symmetrically arranged at two sides of the continuous casting slab to be cut, a through hole is arranged on the upright post, a nut is fixed in the through hole, and the screw rod is screwed in the nut;
2) placing the cooled continuous casting slab on a billet support, and aligning the middle position of the continuous casting slab to a pair of upright posts in the middle;
3) respectively rotating the screw rods on the upright posts and respectively clamping the continuous casting slabs from the front side, the middle side and the rear side;
4) longitudinally and averagely dividing the continuous casting plate blank into a plurality of equal parts and using talcum powder to bounce lines for standby;
5) placing the cutting track in place along the direction of the elastic line, wherein the cutting track is longer than the continuous casting slab;
6) installing a cutting trolley provided with a cutting machine body on a cutting track outside the continuous casting slab;
7) cutting is started, a cutting gap is generated when each cutting is performed once, and the screw on each pair of upright posts is screwed to prevent the billet from forming lateral bending due to uneven heating;
8) the screw is tightened until the cast slab cools to room temperature.
The stand is three at least pairs, and two pairs of stand wherein set up respectively at the both ends of waiting to cut the continuous casting slab, and at least a pair of stand sets up the intermediate position at waiting to cut the continuous casting slab.
And a rotary handle is fixed on the outer side of the screw rod.
And 3) equally dividing the continuous casting slab to be cut into 8-10 equal parts.
The cutting track in the step 4) is 0.5-1.5m longer than the continuous casting slab.
Compared with the prior art, the invention has the beneficial effects that:
1) the trolley bearing cutting machine is used for cutting along the rail in a uniform-speed forward mode, the equipment is simple, the use is flexible, the control is stable, one group (multiple groups) of cutting trolleys and the rail can be added, the cutting is carried out simultaneously, and the cutting efficiency is improved.
2) According to the invention, the front, the middle and the back of the continuous casting slab are respectively clamped and fixed through the adjustable screw rods on the fixed upright posts, so that the whole process from cutting to cooling of the continuous casting slab is kept in a straight state, and the continuous casting slab is prevented from being bent and deformed due to uneven heating.
3) The invention can keep the billet straight and the direction of the cutting surface consistent in the whole cutting process, and plays a great role in ensuring that the continuous casting slab does not turn over in the subsequent procedures of disk hoisting transportation, loading and furnace charging rolling.
Drawings
Fig. 1 is a front view of a cutting tool for preventing bending deformation of a continuous casting slab after cutting according to the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a side view of fig. 1.
Fig. 4 is an enlarged view of point a of fig. 3.
In the figure: 1-a billet holder; 2-upright post; 3-continuous casting plate blank to be cut; 4-cutting the track; 5-cutting the trolley; 6-a nozzle; 7-rotating the handle; 8-screw rod; 9-nut.
Detailed Description
The following further illustrates embodiments of the invention by way of specific examples.
As shown in fig. 1-4, a cutting tool for preventing bending deformation of a continuous casting slab after cutting comprises a billet support 1, a column 2, a cutting rail 4, a cutting trolley 5 and a screw 8, wherein the billet support 1 is supported at the bottom of the continuous casting slab 3 to be cut, the cutting rail 4 is arranged above the billet support 1, the cutting trolley 5 runs on the cutting rail 4, the column 2 is fixed on the billet support 1 and symmetrically arranged at two sides of the continuous casting slab 3 to be cut, a through hole is arranged on the column 2, a nut 9 is fixed in the through hole, and the screw 8 is screwed in the nut 9.
The stand 2 is three at least, and two pairs of stand 2 wherein set up respectively at the both ends of waiting to cut continuous casting slab 3, and at least a pair of stand 2 sets up the intermediate position at waiting to cut continuous casting slab 3.
A rotary handle 7 is fixed on the outer side of the screw 8.
The nut 9 is welded and fixed with the upright post 2; the screw rod 8 can move back and forth for adjustment by rotating the handle 7 and the nut 9, and the length of the thread on the screw rod 8 is not less than 80 mm. This structure can give an inward force to the billet from both sides of the continuous cast slab 3 to be cut to resist the outward bending force of the billet due to uneven heating. The length of the thread determines the thickness of the upright 2 and thus the strength of the upright 2 and the outward force of the billet bending. The nut 9 is embedded into one side of the steel billet of the through hole of the upright post 2, so that the outward force applied to the screw rod 8 by the steel billet can be better resisted, and the nut 9 is not jacked off by the screw rod 8 due to force welding.
A cutting method for preventing bending deformation of a continuous casting slab after cutting comprises the following steps:
1) and placing the cooled continuous casting slab 3 to be cut on the billet support 1, and aligning the middle position of the continuous casting slab 3 to be cut with the pair of vertical columns 2 in the middle.
The cooled continuously cast slab is laid on the slab support 1 using a magnetic disc crane without tilting or tipping the slab.
2) The rotating handles 7 of the screw rods 8 on the pairs of upright posts 2 are respectively rotated to clamp from the front, middle and rear sides of the continuous casting slab 3 to be cut.
3) The continuous casting plate blank 3 to be cut is evenly divided into a plurality of equal parts in the longitudinal direction through calculation, and is reserved by using talcum powder elastic lines.
4) Placing the cutting track 4 in place along the direction of the elastic line, wherein the cutting track 4 is 0.5-1.5m longer than the continuous casting slab to be cut; the purpose is to adjust the travelling speed of the trolley and the flame of the nozzle, so that the adjusted flame uniformly and slowly enters the cut billet, and the surface of the cut surface of the billet cannot be damaged due to fluctuation generated by adjusting the flame.
5) And mounting the cutting trolley 5 provided with the cutting machine body on a cutting track 4 outside the continuous casting slab 3 to be cut.
6) Adjusting the cutting flame and the running speed of the cutting trolley 5, and starting cutting; each cutting is one time, a cutting gap is generated, and each pair of screw rods 8 on the upright posts 2 are screwed tightly, so that the side bending of the continuous casting plate blank due to uneven heating is prevented.
The running speed of the cutting trolley 5 is 0.15m/min, the speed is the optimal cutting speed of the cutting machine, the cutting quality is good, the cutting efficiency is high, and the cutting loss is less.
7) The screw 8 is tightened until the cast slab cools to room temperature.
And finally, loosening the screw 8, and simultaneously hoisting, stacking or transporting the cut square billets cooled to the room temperature by using a magnetic disc crane.
In the step 3), the continuous casting slab 3 to be cut is equally divided into 8-10 equal parts, and the width of the billet cutting seam is considered to be about 8 mm/channel.
The cutting method provided by the invention can keep the billet straight, can enable the directions of the cutting surfaces to be consistent, and plays a great role in ensuring that the billet is not overturned in the subsequent processes of disk hoisting transportation, loading and furnace loading rolling.
Claims (5)
1. A method for preventing bending deformation of a continuous casting slab after cutting is characterized by comprising the following steps:
1) firstly, assembling a cutting tool, wherein the cutting tool comprises a billet support, an upright post, a cutting track, a cutting trolley and a screw rod, the billet support is supported at the bottom of a continuous casting slab to be cut, the cutting track is arranged above the billet support, the cutting trolley runs on the cutting track, the upright post is fixed on the billet support and symmetrically arranged at two sides of the continuous casting slab to be cut, a through hole is arranged on the upright post, a nut is fixed in the through hole, and the screw rod is screwed in the nut;
2) placing the cooled continuous casting slab on a billet support, and aligning the middle position of the continuous casting slab to a pair of upright posts in the middle;
3) respectively rotating the screw rods on the upright posts and respectively clamping the continuous casting slabs from the front side, the middle side and the rear side;
4) longitudinally and averagely dividing the continuous casting plate blank into a plurality of equal parts and using talcum powder to bounce lines for standby;
5) placing the cutting track in place along the direction of the elastic line, wherein the cutting track is longer than the continuous casting slab;
6) installing a cutting trolley provided with a cutting machine body on a cutting track outside the continuous casting slab;
7) cutting is started, a cutting gap is generated when each cutting is performed once, and the screw on each pair of upright posts is screwed to prevent the billet from forming lateral bending due to uneven heating;
8) the screw is tightened until the cast slab cools to room temperature.
2. The method for preventing bending deformation of a continuous casting slab after cutting as claimed in claim 1, wherein the number of the columns is at least three, two pairs of the columns are respectively disposed at both ends of the continuous casting slab to be cut, and at least one pair of the columns is disposed at a middle position of the continuous casting slab to be cut.
3. The method for preventing bending deformation of a continuous casting slab after cutting according to claim 1, wherein a rotating handle is fixed to an outer side of the screw.
4. The method for preventing bending deformation of a continuous casting slab after cutting according to claim 1, wherein the continuous casting slab to be cut is divided into 8-10 equal parts on average in the step 3).
5. The method for preventing bending deformation of a continuous casting slab after cutting according to claim 1, wherein the cutting track in the step 4) is 0.5 to 1.5m longer than the continuous casting slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010941716.7A CN112045158A (en) | 2020-09-09 | 2020-09-09 | Method for preventing continuous casting plate blank from bending and deforming after cutting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010941716.7A CN112045158A (en) | 2020-09-09 | 2020-09-09 | Method for preventing continuous casting plate blank from bending and deforming after cutting |
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| CN112045158A true CN112045158A (en) | 2020-12-08 |
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| CN202010941716.7A Pending CN112045158A (en) | 2020-09-09 | 2020-09-09 | Method for preventing continuous casting plate blank from bending and deforming after cutting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114632923A (en) * | 2022-04-19 | 2022-06-17 | 重庆钢铁股份有限公司 | Method for preventing side bending of square billet in process of heap cooling |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1538988A1 (en) * | 1987-09-29 | 1990-01-30 | В. Н. Кудр вцев, А. В. Кошкин, В. М. Нисковских, П. М. Соловейчик и Ю. И. Иванов | Machine for gas cutting of billets for two-strand installation for continuous casting of metals |
| KR20030010164A (en) * | 2001-07-25 | 2003-02-05 | 주식회사 포스코 | An apparatus for clamping slab for torch cutting machine |
| JP2008119725A (en) * | 2006-11-13 | 2008-05-29 | Daido Steel Co Ltd | Cast slab cutting device for preventing internal oxidation |
| CN201997685U (en) * | 2011-01-14 | 2011-10-05 | 北京鑫月盛华工贸有限公司 | Continuous casting flame cutting machine |
| CN203737972U (en) * | 2014-03-04 | 2014-07-30 | 宝钢特钢有限公司 | Continuous-casting clamping device |
| CN204817970U (en) * | 2015-07-10 | 2015-12-02 | 新疆八一钢铁股份有限公司 | Fixture of square billet bending deformation behind prevent cutting |
| CN206882744U (en) * | 2017-06-08 | 2018-01-16 | 新疆八一钢铁股份有限公司 | The cutter device of on-line tuning continuous casting steel billet cutting width |
| CN207873353U (en) * | 2018-02-05 | 2018-09-18 | 河北普阳钢铁有限公司 | A kind of multi-functional strand cutter device |
| CN209867628U (en) * | 2019-04-26 | 2019-12-31 | 江阴华润制钢有限公司 | Off-line efficient cutting device for continuous casting billets |
| CN210147283U (en) * | 2019-07-08 | 2020-03-17 | 山东盛阳工程机械有限公司 | Super-huge special steel structure slab unloader |
-
2020
- 2020-09-09 CN CN202010941716.7A patent/CN112045158A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1538988A1 (en) * | 1987-09-29 | 1990-01-30 | В. Н. Кудр вцев, А. В. Кошкин, В. М. Нисковских, П. М. Соловейчик и Ю. И. Иванов | Machine for gas cutting of billets for two-strand installation for continuous casting of metals |
| KR20030010164A (en) * | 2001-07-25 | 2003-02-05 | 주식회사 포스코 | An apparatus for clamping slab for torch cutting machine |
| JP2008119725A (en) * | 2006-11-13 | 2008-05-29 | Daido Steel Co Ltd | Cast slab cutting device for preventing internal oxidation |
| CN201997685U (en) * | 2011-01-14 | 2011-10-05 | 北京鑫月盛华工贸有限公司 | Continuous casting flame cutting machine |
| CN203737972U (en) * | 2014-03-04 | 2014-07-30 | 宝钢特钢有限公司 | Continuous-casting clamping device |
| CN204817970U (en) * | 2015-07-10 | 2015-12-02 | 新疆八一钢铁股份有限公司 | Fixture of square billet bending deformation behind prevent cutting |
| CN206882744U (en) * | 2017-06-08 | 2018-01-16 | 新疆八一钢铁股份有限公司 | The cutter device of on-line tuning continuous casting steel billet cutting width |
| CN207873353U (en) * | 2018-02-05 | 2018-09-18 | 河北普阳钢铁有限公司 | A kind of multi-functional strand cutter device |
| CN209867628U (en) * | 2019-04-26 | 2019-12-31 | 江阴华润制钢有限公司 | Off-line efficient cutting device for continuous casting billets |
| CN210147283U (en) * | 2019-07-08 | 2020-03-17 | 山东盛阳工程机械有限公司 | Super-huge special steel structure slab unloader |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114632923A (en) * | 2022-04-19 | 2022-06-17 | 重庆钢铁股份有限公司 | Method for preventing side bending of square billet in process of heap cooling |
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Application publication date: 20201208 |