CN102441591A - Process for manufacturing zero-allowance pressure head furnace shell with metal plates - Google Patents
Process for manufacturing zero-allowance pressure head furnace shell with metal plates Download PDFInfo
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- CN102441591A CN102441591A CN2011103897284A CN201110389728A CN102441591A CN 102441591 A CN102441591 A CN 102441591A CN 2011103897284 A CN2011103897284 A CN 2011103897284A CN 201110389728 A CN201110389728 A CN 201110389728A CN 102441591 A CN102441591 A CN 102441591A
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Abstract
The invention provides a process for manufacturing a zero-allowance pressure head furnace shell with metal plates. The process includes the steps: forming a moulding bed with a curvature radius equal to that of the furnace shell and with strength not lower than that of the metal plates; placing the moulding bed between a driven roll and a press roll of a plate bending machine and adjusting the moulding bed to lead the central axis of the moulding bed to be parallel to the axis of the press roll; placing the metal plates between the moulding bed and the press roll, aligning the metal plates with the moulding bed, pressing two ends and the middle of each metal plate by the press roll to lead the metal plate to have a curvature radius equal to that of the furnace shell, and repeating the step of pressing to obtain a plurality of metal plates respectively having the curvature radius equal to that of the furnace shell; and next, assembling the metal plates to form the furnace shell. The process has the advantages of material saving, cost reduction, precision of dimensional control and capability of improving work efficiency.
Description
Technical field
The present invention relates to the metallurgical furnace equipment technical field, more particularly, relate to a kind of metallic plate nothing left piezometric head furnace shell manufacture craft.
Background technology
Usually, the furnace shell of metallurgical furnace is a vitals of forming metallurgical furnace.Because the furnace shell of metallurgical furnace need satisfy such as requirements such as heat radiation, supports, therefore, generally adopts steel (for example, Wide and Thick Slab) to make the furnace shell of metallurgical furnace.
Below, be made as the deficiency that example is explained the furnace shell preparation method of prior art with last furnace shell.Usually, the main mode of made allowance that adopts of last furnace shell processing is suppressed furnace shell.Fig. 1 schematically shows the furnace shell manufacture craft of prior art.As shown in Figure 1, three rolls plate bending machine comprises topping roll 1, left side bottom roll 2-1 and right side bottom roll 2-2.When forming furnace shell; Need Wide and Thick Slab 5 be positioned between the topping roll 1 and bottom roll 2-1 and 2-2 of three rolls plate bending machine; And topping roll 1 is pressed down make the radius of curvature of Wide and Thick Slab 5 acquisition needs, thereby make Wide and Thick Slab can become the part of furnace shell through the operation three rolls plate bending machine.Yet, two ends of Wide and Thick Slab 5 must leave certain surplus (for example, 300mm), to guarantee the compacting of furnace shell.Obviously, caused the wide variety of materials waste like this.In addition, finally need cut away, therefore, increase the cutting workload, and can cause the size Control difficulty to increase owing to reserve bend allowance.
Summary of the invention
To the above-mentioned deficiency of prior art, the furnace shell manufacture craft that the object of the present invention is to provide a kind of fabricating quality that can guarantee furnace shell and save material.
The invention provides a kind of metallic plate nothing left piezometric head furnace shell manufacture craft, said technology may further comprise the steps: form the loose tool that radius of curvature equals the radius of curvature of furnace shell, and said loose tool has the intensity that is not less than said metallic plate intensity; Said loose tool is placed between the driven roll and depress roller of veneer reeling machine, the adjustment loose tool makes the parallel axes of its central axis and depress roller; Then; Metallic plate is placed between said loose tool and the said depress roller; Metallic plate and loose tool are aligned, through two ends and the middle part of said depress roller pressed metal plate, so that said metallic plate has the radius of curvature that equals the furnace shell radius of curvature; Repeat this step, obtain having a plurality of metallic plates that radius of curvature equals the furnace shell radius of curvature; Next, said a plurality of metallic plate assembly units are formed furnace shell.
In one exemplary embodiment of the present invention, said veneer reeling machine can be for having the three rolls plate bending machine of two driven rolls and a depress roller.
In one exemplary embodiment of the present invention, said furnace shell can be last furnace shell.
Compared with prior art; Metallic plate nothing left piezometric head furnace shell manufacture craft of the present invention is suppressed the metallic plate of dead size blanking through using loose tool; Assembly unit obtains furnace shell then, the advantage that have the saving material, reduce cost, size Control accurately also can improve work efficiency.
Description of drawings
Through the description of carrying out below in conjunction with accompanying drawing, above-mentioned and other purposes of the present invention and characteristics will become apparent, wherein:
Fig. 1 schematically shows the furnace shell manufacture craft of prior art;
Fig. 2 schematically shows metallic plate nothing left piezometric head furnace shell manufacture craft according to an exemplary embodiment of the present invention;
Fig. 3 schematically shows the setting-out and the scale material of metallic plate nothing left piezometric head furnace shell manufacture craft according to an exemplary embodiment of the present invention.
Reference numeral:
The specific embodiment
Hereinafter, will describe metallic plate nothing left piezometric head furnace shell manufacture craft of the present invention in detail with reference to accompanying drawing and concrete example.
Fig. 2 schematically shows metallic plate nothing left piezometric head furnace shell manufacture craft according to an exemplary embodiment of the present invention.
As shown in Figure 2, metallic plate nothing left piezometric head furnace shell manufacture craft of the present invention may further comprise the steps:
(1) form the loose tool 3 that radius of curvature equals the radius of curvature of furnace shell, and loose tool 3 has the intensity that is not less than metallic plate semi-finals degree;
(2) loose tool 3 is placed between the driven roll (that is, left side bottom roll 2-1 and right side bottom roll 2-1) and depress roller (that is, topping roll 1) of veneer reeling machine, adjustment loose tool 3 makes the parallel axes of its central axis and topping roll 1;
(3) metallic plate 4 is placed between loose tool 3 and the topping roll 1; Metallic plate 4 and loose tool 3 are aligned; Two ends and middle part through topping roll 1 pressed metal plate 4; So that metallic plate 4 has the radius of curvature that equals the furnace shell radius of curvature, repeat this step, obtain having a plurality of metallic plates 4 that radius of curvature equals the furnace shell radius of curvature;
(4) a plurality of metallic plate 4 assembly units are formed furnace shell.
Metallic plate nothing left piezometric head furnace shell manufacture craft of the present invention can be used to make last furnace shell.Yet, it will be apparent to those skilled in the art that to the invention is not restricted to this; For example; Furnace shell with metallurgical furnace of steel furnace shell or other metal material furnace shell all can use metallic plate nothing left piezometric head furnace shell manufacture craft of the present invention to make, and especially, metallic plate nothing left piezometric head furnace shell manufacture craft of the present invention to the difficult crooked metallic plate in end (for example can be used for; Wide and Thick Slab) carries out bending, make its formation have the radius of curvature of requirement.
Below, be that example is explained metallic plate nothing left piezometric head furnace shell manufacture craft according to an exemplary embodiment of the present invention to make last furnace shell.This example only is used to illustrate technology of the present invention, and is not to be used to limit technology of the present invention.
Last furnace shell is made example
(1), calculates scale material size with the furnace shell expansion setting-out
With whole last furnace shell expansion setting-out, key dimension is as shown in table 1 through CAD.Scale material size by actual setting-out size combines to design every band furnace shell is again decided.The scale material will consider to cut the impurity that surplus and panel edges exist, thereby both sides will respectively add the surplus of 20mm, and the 600mm process allowance that does not need traditional handicraft to require.Here, each reel number refers to the part according to the furnace shell of highly dividing the diverse location that last furnace shell obtains.
Table 1 last furnace shell development size table
Fig. 3 schematically show metallic plate nothing left piezometric head furnace shell manufacture craft according to an exemplary embodiment of the present invention be used to make last furnace shell the time setting-out and scale material.As shown in Figure 3, the employed Wide and Thick Slab of metallic plate nothing left piezometric head furnace shell manufacture craft of the present invention can consider to cut the impurity of surplus and panel edges existence when scale, and respectively adds the surplus of 20mm at the two ends of Wide and Thick Slab.
(2) make loose tool
The loose tool employing trade mark is that the steel plate compacting of Q345B, thickness δ=70mm forms.Wherein, the bent rate radius R of loose tool equals the radius of curvature of the furnace shell of suppressing basically.
(3) the compacting Wide and Thick Slab makes it have the desired radius of curvature of furnace shell
Said loose tool is put between the roll of three rolls plate bending machine, suppressed the middle part and the two ends of said a plurality of Wide and Thick Slab through the depress roller of loose tool and three rolls plate bending machine, so that said a plurality of Wide and Thick Slab has the radius of curvature that equals the furnace shell radius of curvature.Specifically, before compacting, need check blank size, and will be clean as polishings such as the impurity on the upper and lower surface of the Wide and Thick Slab of furnace shell material, iron oxide.When hanging in loose tool in the veneer reeling machine, the adjustment loose tool makes the parallel axes of its central axis and depress roller.For example, levelling can show as loose tool and veneer reeling machine lower roll even contact and laterally consistent with lower roll, and is vertical vertical with lower roll.Ready furnace shell is hung in the loose tool and aligns, and the work that aligns mainly is the furnace shell termination to be adjusted to consistent with loose tool, roll shaft, does not occur scurrying the angle phenomenon when guaranteeing to roll.Respectively the two ends of Wide and Thick Slab is carried out roll-forming; One end of Wide and Thick Slab is inserted in the arc loose tool; The arc length of pre-bending should be than more than the big 100mm of veneer reeling machine two lower shaft center width; And Wide and Thick Slab and loose tool aligned (for example, can make vertical line and the parallel axes of bottom roll or topping roll of arbitrary straight flange of Wide and Thick Slab realize Wide and Thick Slab and loose tool are aligned) and can steadily roll to guarantee Wide and Thick Slab; The top roll that descends then compresses the plate alternating bending, rolls to note by bent plate spare play not being arranged in the process.Finally, obtain having a plurality of Wide and Thick Slab of the radius of curvature of requirement.Here, above-mentioned pre-bending is meant in advance Wide and Thick Slab to be rolled is put on the fetal membrane, carries out preliminary roll-in, helps follow-up alternating bending operation like this.The arc length of pre-bending should mainly be that the length of considering the arc length of pre-bending can roll on the upper surface of two bottom rolls fully back and forth than more than the big 100mm of veneer reeling machine two lower shaft center width.
(4) correction and preparatory assembly unit
Utilize principle of expanding with heat and contracting with cold to carry out flame correction, Tc can not be above 800 ℃.When carrying out flame correction, according to position, length, width, the grilled gun wind line of the size decision baking of the curvature difference distance of curvature after being pressed into and actual needs.When curvature 1/R is excessive, oven skin outside; When curvature is too small, oven intracutaneous side.The furnace shell bottom does not allow the barrier that influences shell deformation during baking.The baking degree of depth is decided according to amount of curvature, and checks at any time that with the card model its quality should meet the following requirements: the upper and lower chord length after the furnace shell making is shaped and the diagonal of upper and lower string measuring point thereof should be consistent with driven dimension.The curvature application card model inspection that furnace shell is molded, the card model is made by inspection line radius, and length is not less than 2 meters, and tolerance is apart from 500mm length, and the gap must not be greater than 2mm.The upright tape edge of furnace shell must not have buckling phenomenon along wanting straight.Furnace shell chord length after the shaping, the arc string should be consistent with the size of calculating apart from diagonal, and permissible variation is ± 1mm.Stove skin surface is clean and tidy, and groove is level and smooth, does not have obvious concave surface and damage.
Set up platform before the prepackage, added backing plate by the furnace shell diameter, at interval 300mm places a backing plate, guarantee whole circumference direction absolute altitude be controlled at ± the 1mm scope in.Each prepackage generally must not surpass the four-tape, and prepackage acts in accordance with its nature, can not in stove, weld stay bolt spare and force moulding.A last prepackage band (four-tape stove skin) topmost circle will be as the foundation ring of next prepackage band.After every group of prepackage was qualified, the relevant personnel such as notice quality inspection checked approval, carry out the prepackage record, with 0 °; 90 °; 180 °; 270 ° of marks are write clearly, stamp steel seal.After furnace shell has been pre-installed, must stand up during stacking, forbidden heavily to hit, heavily bump, avoid distortion.
The table 2 last furnace shell pre-assembled permissible variation and the method for inspection
Comparative Examples
Certain steel mill adopts W11S one 80*3000mm fine setting hydraulic levels down-adjusted three-roll plate bending machine when making the blast furnace of equal type, with the direct roll-forming once on veneer reeling machine of the furnace shell of honest material down.Yet this method requires every furnace shell two ends to stay each 300mm of prebuckling surplus, and is as shown in Figure 1.Therefore, need reserve about 70 tons of bend allowance altogether.In addition, owing to the reservation bend allowance of two sections of every furnace shells finally need be cut away, therefore, increase the cutting workload, and can cause the size Control difficulty to increase.
The cylindrical furnace shell example
Below, with describing the step of using metallic plate nothing left piezometric head furnace shell manufacture craft of the present invention to make cylindrical furnace shell.
The Wide and Thick Slab that adopts four block sizes to equate is made cylindrical furnace shell.The length of Wide and Thick Slab equals 1/4th of cylindrical furnace shell girth, and its width equals the height of cylindrical furnace shell.Adopt three rolls plate bending machine to suppress Wide and Thick Slab.
At first, form the loose tool that radius of curvature equals the radius of curvature of furnace shell, and loose tool has the intensity of the intensity of the Wide and Thick Slab of being not less than.
Then, loose tool is placed between two bottom rolls and the topping roll as depress roller of three rolls plate bending machine, the adjustment loose tool makes the parallel axes of its central axis and topping roll.
Next; Wide and Thick Slab is placed between loose tool and the topping roll and the two is aligned; Start three rolls plate bending machine, use the roll compaction Wide and Thick Slab, earlier an end of compacting Wide and Thick Slab; Then at the middle part and another end of compacting Wide and Thick Slab, so that Wide and Thick Slab has the radius of curvature that equals the furnace shell radius of curvature.Then, suppress other three Wide and Thick Slab in an identical manner, make their radius of curvature equal the furnace shell radius of curvature.
At last, four Wide and Thick Slab assembly units and welding are formed furnace shell.
To sum up; Metallic plate nothing left piezometric head furnace shell manufacture craft of the present invention is suppressed the metallic plate of dead size blanking through using loose tool; Assembly unit obtains furnace shell then, the advantage that have the saving material, reduce cost, size Control accurately also can improve work efficiency.
Although combined exemplary embodiment to describe the present invention above, it will be apparent to those skilled in the art that under the situation of spirit that does not break away from claim and limited and scope, can make various modifications to above-mentioned exemplary embodiment.
Claims (3)
1. metallic plate nothing left piezometric head furnace shell manufacture craft is characterized in that said technology may further comprise the steps:
Form the loose tool that radius of curvature equals the radius of curvature of furnace shell, and said loose tool has the intensity that is not less than said metallic plate intensity;
Said loose tool is placed between the driven roll and depress roller of veneer reeling machine, the adjustment loose tool makes the parallel axes of its central axis and depress roller;
Then; Metallic plate is placed between said loose tool and the said depress roller; Metallic plate and loose tool are aligned, through two ends and the middle part of said depress roller pressed metal plate, so that said metallic plate has the radius of curvature that equals the furnace shell radius of curvature; Repeat this step, obtain having a plurality of metallic plates that radius of curvature equals the furnace shell radius of curvature;
Next, said a plurality of metallic plate assembly units are formed furnace shell.
2. metallic plate nothing left piezometric head furnace shell manufacture craft according to claim 1 is characterized in that said veneer reeling machine is the three rolls plate bending machine with two driven rolls and a depress roller.
3. metallic plate nothing left piezometric head furnace shell manufacture craft according to claim 1 is characterized in that said furnace shell is a last furnace shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103897284A CN102441591A (en) | 2011-11-30 | 2011-11-30 | Process for manufacturing zero-allowance pressure head furnace shell with metal plates |
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| CN2011103897284A CN102441591A (en) | 2011-11-30 | 2011-11-30 | Process for manufacturing zero-allowance pressure head furnace shell with metal plates |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717242A (en) * | 2012-07-06 | 2012-10-10 | 洛阳市双勇机器制造有限公司 | Technology for rolling wheel rims by using three-roller plate rolling machine |
| CN103817178A (en) * | 2012-11-16 | 2014-05-28 | 法兰泰克重工股份有限公司 | Method for rolling pre-bent flat plates |
| CN103894457A (en) * | 2012-12-28 | 2014-07-02 | 南通大通宝富风机有限公司 | Plate bending machine with pre-bending device |
| CN106378836A (en) * | 2016-11-10 | 2017-02-08 | 佛山市南海新达高梵实业有限公司 | Roller press for wall-hung cupboard panels |
| CN107639359A (en) * | 2017-10-30 | 2018-01-30 | 二重集团（镇江）重型装备厂有限责任公司 | A kind of modified welding procedure for thick-walled vessel cylinder longitudinal joint groove |
| CN109047426A (en) * | 2018-07-20 | 2018-12-21 | 中国葛洲坝集团机械船舶有限公司 | A kind of tile steel plate pressure head fabricated device and method |
| CN112588895A (en) * | 2020-12-03 | 2021-04-02 | 江南造船(集团)有限责任公司 | Shell plate roll bending forming method |
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| CN101653796A (en) * | 2009-09-14 | 2010-02-24 | 华中科技大学 | New type bending and rolling compound machine tool with pre-bending mould |
| CN101972915A (en) * | 2010-08-04 | 2011-02-16 | 南京宝色股份公司 | Method for preparing corrosion-resistant non-ferrous metal pipeline |
| CN102151723A (en) * | 2011-05-24 | 2011-08-17 | 浙江通达钢模有限公司 | Forming device for end arc of steel plate |
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Patent Citations (5)
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| JPS62137124A (en) * | 1985-12-11 | 1987-06-20 | Masanori Mochizuki | Roll bending method and device used for execution of this method |
| CN201376017Y (en) * | 2009-04-08 | 2010-01-06 | 西安高大机电有限公司 | Bending type drum reeling device |
| CN101653796A (en) * | 2009-09-14 | 2010-02-24 | 华中科技大学 | New type bending and rolling compound machine tool with pre-bending mould |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717242A (en) * | 2012-07-06 | 2012-10-10 | 洛阳市双勇机器制造有限公司 | Technology for rolling wheel rims by using three-roller plate rolling machine |
| CN103817178A (en) * | 2012-11-16 | 2014-05-28 | 法兰泰克重工股份有限公司 | Method for rolling pre-bent flat plates |
| CN103894457A (en) * | 2012-12-28 | 2014-07-02 | 南通大通宝富风机有限公司 | Plate bending machine with pre-bending device |
| CN106378836A (en) * | 2016-11-10 | 2017-02-08 | 佛山市南海新达高梵实业有限公司 | Roller press for wall-hung cupboard panels |
| CN107639359A (en) * | 2017-10-30 | 2018-01-30 | 二重集团（镇江）重型装备厂有限责任公司 | A kind of modified welding procedure for thick-walled vessel cylinder longitudinal joint groove |
| CN109047426A (en) * | 2018-07-20 | 2018-12-21 | 中国葛洲坝集团机械船舶有限公司 | A kind of tile steel plate pressure head fabricated device and method |
| CN112588895A (en) * | 2020-12-03 | 2021-04-02 | 江南造船(集团)有限责任公司 | Shell plate roll bending forming method |
| CN112588895B (en) * | 2020-12-03 | 2022-07-22 | 江南造船(集团)有限责任公司 | Shell plate roll bending forming method |
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Application publication date: 20120509 |