CN104368620A - Extruding, guiding and straightening device of vertical extruding machine of large-diameter and thick-wall stainless steel pipe - Google Patents
Extruding, guiding and straightening device of vertical extruding machine of large-diameter and thick-wall stainless steel pipe Download PDFInfo
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- CN104368620A CN104368620A CN201410688941.9A CN201410688941A CN104368620A CN 104368620 A CN104368620 A CN 104368620A CN 201410688941 A CN201410688941 A CN 201410688941A CN 104368620 A CN104368620 A CN 104368620A
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Abstract
The invention relates to an extruding, guiding and strengthening device of a vertical extruding machine of a large-diameter and thick-wall stainless steel pipe, belonging to the technical field of metal extrusion. According to the extruding guiding and strengthening device, a high-temperature alloy extruding die seat guiding lining is fixedly connected with a die seat lengthening guiding and straightening sleeve by a transition connector to form an assembly. At the initial stage of hotly extruding a steel pipe, when the temperature of the steel pipe is 1000-1100 DEG C, extruding and ejecting force is used for guiding and straightening the extruded steel pipe in real time; the steel pipe is extruded while is guided and straightened; and the bending generated at the head of the steel pipe is effectively straightened. After the guiding and straightening device is additionally arranged, on the one hand, the bending phenomenon of the head of the steel pipe is controlled and the head of the steel pipe is effectively utilized, and the material utilization rate can be improved by 5%-10%; and on the other hand, the bending degree of the whole steel pipe is greatly reduced until the extrusion is finished in a whole extruding process, secondary heating and straightening does not need to be carried out, a subsequent straightening working procedure is simplified, the efficiency is improved and energy sources are saved.
Description
technical field:
the present invention relates to a kind of real-time guiding and the aligning that extrude steel pipe, particularly relate to major-diameter thick-wall seamless steel pipe vertical extruder extruding guiding straightener, belong to technical field of metal extrusion.
background technology:
Inner Monggolia North Heavy Industry Group Co., Ltd's large-caliber thick-wall seamless steel tube in vertical extrusion way engineering construction project, rely on autonomous innovation successfully to squeeze out first high pressure thick-walled seamless steel pipes completely on July 13rd, 2009, indicate the success of 3.6 ten thousand tons of ferrous metal vertical extruder project construction.This project is a brand-new system engineering, and the experience without any maturation can be used for reference.Heavy caliber thick wall seamless steel tube extrusion process and the large key problem in technology of heavy extruding equipment two is related at technological layer.Technology is had a poor foundation at home, and under adding the situation of external blockade on new techniques, this two large key problem in technology of Gonna breakthrough, only assaults fortified position, rely on autonomous innovation completely, overturn conventional art.Especially, in technology exploitation, the critical process difficult problems such as tool and mould manufactures and designs, steel tube extrusion are breached.Along with extrusion process research, trial-production, progressively the completing of batch production, obtain two breakthroughs of jumbo development and heavy extrusion process (frock).But along with the requirement of batch production cost, the raising of stock utilization highlights into very crucial factor.
Existing apparatus is shown in Fig. 1, die holder liner height for Contoured squeeze pipe external diameter only has 450mm, so easily there is buckling phenomenon in the head of extruding steel pipe, steel pipe linearity after extruding is poor, especially more easily occur bending within the scope of extruding steel pipe head 1200mm, extruded tube must reach interior curved, outer jumping requirement after straightener aligning, just can carry out follow-up machining and spray and to quench operation.For reaching alignment steel pipe total length maximum outside diameter jerk value≤6mm, total length endoporus maximum flexion≤3mm, depth of cup during alignment more than the technical requirement of 3mm, must not need carry out repeatedly repeatedly straighten while cold and hot alignment to the bending of different angles at the different parts of workpiece or same position.Usual alignment will through the work step of much wasting time and energy: hang on transmission workbench with overhead traveling crane by workpiece, alignment station is sent to by transmission workbench, by rotary carrier roller, workpiece is rotated to the position needing alignment, with lowering or hoisting gear, workpiece is raised to the operating position of mould, mobile pressure head carries out alignment to workpiece forward, through repeatedly carrying out above action.But, with straightener, aligning is difficult to for bending within the scope of steel pipe head 1200mm, can flattens when being heated to 600 ~ 700 DEG C of alignings, following process surplus can not be ensured, production tube head can only be removed, become stub bar.Cause that stock utilization is low, production cost is high, the energy and the wasting of resources, the production cycle is long, efficiency is low.
summary of the invention:
Carry out guiding aligning while the object of the present invention is to provide a kind of at high temperature major-diameter thick-wall seamless steel pipe to carry out vertical extruding, avoid the major-diameter thick-wall seamless steel pipe vertical extruder extruding guiding straightener of the major-diameter thick-wall seamless steel pipe head-bent be extruded.
Technical solution:
The present invention includes: high temperature alloy extruding die holder guiding inner lining lengthens to lead by transit joint and die holder and aligns cover and be fixedly connected with and be assembled into assembly.
Further: assembly height is greater than 1650mm.
Further: it is coaxial that high temperature alloy extruding die holder guiding inner lining, transit joint and die holder lengthen guiding aligning cover.
Further: transit joint is placed in high temperature alloy extruding die holder guiding inner lining top center, and lengthen with die holder and lead that to align the inside and outside footpath overlapped identical.
Further: high temperature alloy extruding die holder guiding inner lining is shape is truncated cone, the transit joint height 150mm ~ 180mm at top.
Further: the straight tube wall thickness that high temperature alloy extruding die holder guiding inner lining transit joint and die holder lengthen guiding aligning cover is 50mm ~ 60mm.
Further: die holder lengthens the height 1200mm ~ 1500mm of guiding aligning cover.
Further: die holder lengthens the height 1200mm ~ 1500mm of guiding aligning cover.
Further: high temperature alloy extruding die holder guiding inner lining lengthens to lead to align to overlap with die holder and welds, and the double V-groove of 30 ° is all opened at two weld parts positions; Selection of electrodes J857 or 80kg ~ 90kg level welding rod; 450 DEG C are preheating to, with heating tape single-side heating parcel width 200mm before welding; Hammering method is used to eliminate stress during welding; Postheating is to room temperature.
Further: described transit joint and die holder lengthening guiding aligning put and be equipped with hole for hoist.
At the Steel Pipe Heat extruding initial stage, namely start in the moment starting to extrude, temperature of steel pipe is under the state of 1000 ~ 1100 DEG C, utilize extruding to eject strength lead in real time to extruding steel pipe and align, namely while extruding, simultaneously while guiding and aligning, to bending effectively aligning of steel pipe head generation.After setting up guiding straightener, on the one hand, not only controlled extruding steel pipe head-bent phenomenon, and can effectively utilize steel pipe head, stock utilization can improve 5% ~ 10%; On the other hand, in whole extrusion process, until extruding terminates, the flexibility of whole Zhi Gangguan alleviates greatly, does not need to carry out post bake aligning, simplifies follow-up aligning operation, raises the efficiency, economize energy.
accompanying drawing illustrates:
Fig. 1 is the present invention's former extruding die holder guiding inner lining and extruding steel pipe schematic diagram;
Fig. 2 is that the present invention extrudes guiding straightener and extruding steel pipe schematic diagram;
Fig. 3 is that the present invention extrudes die holder guiding inner lining structural representation;
Fig. 4 is that the present invention extrudes die holder guiding inner lining sectional view.
detailed description of the invention:
High temperature alloy of the present invention extruding die holder guiding inner lining 1 lengthens to lead by transit joint and die holder and aligns cover 2 and be fixedly connected with and be assembled into assembly; High temperature alloy extruding die holder guiding inner lining 1 shape is truncated cone, and top has additional highly for the step straight tube of 150mm is as transit joint; It is consistent that transit joint endoporus and former high temperature alloy extrude die holder guiding inner lining 1 aperture, integrally processes; It is coaxial that high temperature alloy extruding die holder guiding inner lining 1, transit joint and die holder lengthen guiding aligning cover 2; Transit joint is placed in high temperature alloy extruding die holder guiding inner lining 1 top center, and to lengthen the inside and outside footpath of aligning cover 1 of leading identical with die holder; Object is easy centering when being convenient to both welding, ensures reliably to weld; Comprehensive accounting its guiding aligning intensity and weight, determine that the straight tube wall thickness of high temperature alloy extruding die holder guiding inner lining 1 transit joint and die holder lengthening guiding aligning cover 2 is 50mm; Through checking, can ensure that it has enough intensity; The height that die holder lengthens guiding aligning cover 2 is 1200mm, and vertical extruding guiding straightener total height is 1650mm; Its role is to: at the Steel Pipe Heat extruding initial stage, namely start in the moment starting to extrude, temperature of steel pipe is under the state of 1000 ~ 1100 DEG C, utilize extruding to eject strength lead in real time to extruding steel pipe and align, namely while extruding, simultaneously on one side guiding and aligning, to bendingly effectively aligning of producing within the scope of at least 1.5 meters, steel pipe head.After setting up guiding straightener, guiding and straightening function can be played to subsequent extrusion.On the one hand, not only controlled extruding steel pipe head-bent phenomenon, and can effectively utilize steel pipe head, stock utilization can improve 5% ~ 10%; On the other hand, in whole extrusion process, until extruding terminates, the flexibility of whole Zhi Gangguan alleviates greatly, does not need to carry out post bake aligning, simplifies follow-up aligning operation, raises the efficiency, economize energy.
High temperature alloy extruding die holder guiding inner lining 1 of the present invention is 42CrMo forging, it is that P91 or P92 extrudes steel pipe that die holder lengthens its material of guiding aligning cover 2, both designs of part are supporting with maching dimension, the rear specific weld process that adopts of assembling welds, and adopting specific weld technique, main technologic parameters: the double V-groove of 30 ° is all opened at two weld parts positions; Selection of electrodes J857 or 80kg ~ 90kg level welding rod, welds, and puts correct, welds after two part centerings; 450 DEG C are preheating to, with heating tape single-side heating parcel width 200mm before welding; Hammering method is used to eliminate stress during welding; Postheating is to room temperature.
High temperature alloy of the present invention extruding die holder guiding inner lining 1 and die holder lengthen to lead and align cover 2 and adopt the mode of welding to be connected, the good forging 42CrMo of high temperature alloy extruding die holder guiding inner lining 1 material selection combination property, die holder lengthens guiding aligning cover 2 and adopts existing steel pipe stub bar, material is P91, and die holder lengthens guiding aligning cover 2 and is arranged with lifting, loss of weight and louvre.For loss of weight and lifting, there is the function of heat radiation simultaneously, and ensure that it has enough intensity; The step straight tube that the top of truncated cone high temperature alloy extruding die holder guiding inner lining 1 increases is provided with hole for hoist, the lifting operations such as convenient carrying and installation.
The present invention is according to the design feature of 360MN vertical extruder and mould installation situation, common forcing press cannot be installed as guiders such as guide pillar guiding sleeve types, for the defect of extrusion die without guider, set up at the outlet position of 360MN extruder extrusion die and install guiding straightener additional, high temperature alloy extruding die holder guiding inner lining 1 endoporus is used for Contoured squeeze pipe external diameter, aligning is just started at the Steel Pipe Heat extruding initial stage, namely start in the moment starting to extrude, temperature of steel pipe is under the state of 1000 ~ 1100 DEG C, utilize extruding to eject strength lead in real time to extruding steel pipe and align, namely while extruding, simultaneously while guiding and aligning, to bending effectively aligning of steel pipe head generation.
By actual tests, do not occur bending within the scope of extruding steel pipe head 1200mm, Wall-Thickness Difference obviously reduces, and the stock utilization of extruding steel pipe improves greatly.
Claims (10)
1. major-diameter thick-wall seamless steel pipe vertical extruder extruding guiding straightener, comprise: high temperature alloy extruding die holder guiding inner lining (1), it is characterized in that, high temperature alloy extruding die holder guiding inner lining (1) lengthens to lead to align by transit joint and die holder and overlaps (2) and be fixedly connected with and be assembled into assembly.
2. major-diameter thick-wall seamless steel pipe vertical extruder extruding guiding straightener according to claim 1, it is characterized in that, assembly height is greater than 1650mm.
3. major-diameter thick-wall seamless steel pipe vertical extruder extruding guiding straightener according to claim 1, it is characterized in that, it is coaxial that high temperature alloy extruding die holder guiding inner lining (1), transit joint and die holder lengthen guiding aligning cover (2).
4. the major-diameter thick-wall seamless steel pipe vertical extruder extruding guiding straightener according to claim 1 or 3, it is characterized in that, transit joint is placed in high temperature alloy extruding die holder guiding inner lining (1) top center, and lengthens with die holder and lead that to align the inside and outside footpath overlapping (2) identical.
5. major-diameter thick-wall seamless steel pipe vertical extruder according to claim 4 extruding guiding straightener, is characterized in that, high temperature alloy extruding die holder guiding inner lining (1) for shape be truncated cone, the transit joint height 150mm ~ 180mm at top.
6. major-diameter thick-wall seamless steel pipe vertical extruder extruding guiding straightener according to claim 5, it is characterized in that, the straight tube wall thickness that high temperature alloy extruding die holder guiding inner lining (1) transit joint and die holder lengthen guiding aligning cover (2) is 50mm ~ 60mm.
7. the major-diameter thick-wall seamless steel pipe vertical extruder extruding guiding straightener according to claim 1,3 or 6, it is characterized in that, die holder lengthens the height 1200mm ~ 1500mm of guiding aligning cover (2).
8. major-diameter thick-wall seamless steel pipe vertical extruder extruding guiding straightener according to claim 4, it is characterized in that, die holder lengthens the height 1200mm ~ 1500mm of guiding aligning cover (2).
9. major-diameter thick-wall seamless steel pipe vertical extruder extruding guiding straightener according to claim 1, it is characterized in that, high temperature alloy extruding die holder guiding inner lining (1) and die holder lengthen to lead to align and overlap (2) and weld, and the double V-groove of 30 ° is all opened at two weld parts positions; Selection of electrodes J857 or 80kg ~ 90kg level welding rod; 450 DEG C are preheating to, with heating tape single-side heating parcel width 200mm before welding; Hammering method is used to eliminate stress during welding; Postheating is to room temperature.
10. major-diameter thick-wall seamless steel pipe vertical extruder extruding guiding straightener according to claim 1, it is characterized in that, described transit joint and die holder lengthen in guiding aligning cover (2) and are equipped with hole for hoist.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410688941.9A CN104368620B (en) | 2014-11-26 | 2014-11-26 | The extruding of major-diameter thick-wall seamless steel pipe vertical extruder guides straightener |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410688941.9A CN104368620B (en) | 2014-11-26 | 2014-11-26 | The extruding of major-diameter thick-wall seamless steel pipe vertical extruder guides straightener |
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| CN104368620A true CN104368620A (en) | 2015-02-25 |
| CN104368620B CN104368620B (en) | 2016-09-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110539175A (en) * | 2019-09-17 | 2019-12-06 | 格力电器（石家庄）有限公司 | Copper pipe machining device |
Citations (6)
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| GB861617A (en) * | 1958-05-02 | 1961-02-22 | Aluminum Co Of America | Extrusion and stretching of elongate sections |
| US3839895A (en) * | 1972-07-04 | 1974-10-08 | Oki Electric Cable | Method of drawing wire and apparatus therefor |
| CN1744956A (en) * | 2003-04-11 | 2006-03-08 | 杰富意钢铁株式会社 | Method and device for manufacturing tube with high dimensional accuracy |
| CN201020481Y (en) * | 2007-03-23 | 2008-02-13 | 桂林漓佳金属有限责任公司 | Extrusion device used for producing high precision petroleum pump copper alloy pipe |
| CN202427740U (en) * | 2011-12-12 | 2012-09-12 | 西安航空动力股份有限公司 | Blank forming extrusion die holder |
| CN103658213A (en) * | 2013-11-26 | 2014-03-26 | 山东建筑大学 | Novel extrusion method for efficiently machining straight spur gear |
-
2014
- 2014-11-26 CN CN201410688941.9A patent/CN104368620B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB861617A (en) * | 1958-05-02 | 1961-02-22 | Aluminum Co Of America | Extrusion and stretching of elongate sections |
| US3839895A (en) * | 1972-07-04 | 1974-10-08 | Oki Electric Cable | Method of drawing wire and apparatus therefor |
| CN1744956A (en) * | 2003-04-11 | 2006-03-08 | 杰富意钢铁株式会社 | Method and device for manufacturing tube with high dimensional accuracy |
| CN201020481Y (en) * | 2007-03-23 | 2008-02-13 | 桂林漓佳金属有限责任公司 | Extrusion device used for producing high precision petroleum pump copper alloy pipe |
| CN202427740U (en) * | 2011-12-12 | 2012-09-12 | 西安航空动力股份有限公司 | Blank forming extrusion die holder |
| CN103658213A (en) * | 2013-11-26 | 2014-03-26 | 山东建筑大学 | Novel extrusion method for efficiently machining straight spur gear |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110539175A (en) * | 2019-09-17 | 2019-12-06 | 格力电器（石家庄）有限公司 | Copper pipe machining device |
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| CN104368620B (en) | 2016-09-28 |
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