CN101623704A - Multi-roller large-diameter thin-wall seamless tube rolling mill - Google Patents
Multi-roller large-diameter thin-wall seamless tube rolling mill Download PDFInfo
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- CN101623704A CN101623704A CN200810124265A CN200810124265A CN101623704A CN 101623704 A CN101623704 A CN 101623704A CN 200810124265 A CN200810124265 A CN 200810124265A CN 200810124265 A CN200810124265 A CN 200810124265A CN 101623704 A CN101623704 A CN 101623704A
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- 238000009785 tube rolling Methods 0.000 title abstract description 4
- 230000033001 locomotion Effects 0.000 claims description 16
- 230000003044 adaptive effect Effects 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 210000001331 nose Anatomy 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 15
- 239000010959 steel Substances 0.000 abstract description 15
- 238000005096 rolling process Methods 0.000 abstract description 13
- 238000005097 cold rolling Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000005242 forging Methods 0.000 description 7
- 238000003490 calendering Methods 0.000 description 4
- 101150101567 pat-2 gene Proteins 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
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Abstract
A multi-roller large-diameter thin-wall seamless tube rolling mill. Relates to a rolling mill for cold rolling large-caliber thin-wall seamless steel pipes. The roller runs stably, and the difference value of the linear speeds of the middle part and the two ends of the concave arc-shaped roller path of the roller is small, so that overlarge plastic deformation of the pipe in the axial direction is avoided. Comprises a main machine head, a seamless tube clamping and feeding device and a mandrel feeding and returning device; the main machine head comprises a frame and a base, a rolling head is arranged in the frame, a rolling head driving mechanism is arranged on the base, the rolling head in the frame can reciprocate relative to the base, the rolling head, the seamless pipe and the mandrel are concentrically arranged, the rolling head driving mechanism is provided with two driving rods which synchronously move and have different speeds, and the driving rods reciprocate along the axial direction of the rolling head; the rolling head is composed of a body and a roller group which are concentrically arranged and can relatively move along an axis, the driving rods with different speeds in two stages are connected with the body at a high speed, and the driving rods with low speed are connected with the roller group. The rolling process is stable, and the finished pipe has high precision and good quality.
Description
Technical field
The present invention relates to slitless tube mill, especially cold rolling large-diameter thin-wall seamless steel pipe milling train.
Background technology
The processing of seamless steel pipe can be by finishing in hot rolling, the cold-rolling process.Hot rolling processing power consumption is high, and the production tube surface quality can not meet the requirement of direct utilization.Some users wish that the large-diameter thin-wall seamless pipe that obtains has certain precision, to reduce back road metalworking, reduce user's production cost.Therefore, cold rolling processing progressively forms, and as A Saier tube rolling method multimachine frame skew rolling mill arranged in form, that be used for the extension of thin-walled hollow forging, but the type of this equipment is big, and cost of investment is very high, and the production tube surface quality can not satisfy user's demand fully.
Present stage, the reciprocal cold-rolling equipment of the domestic employing periodic of small-bore seamless steel pipe in China, mainly be two rollers, the reciprocal cold-rolling mill of three roller periodics, the appearance of production tube is bright and clean, dimensional accuracy is high, the working (machining) efficiency height, output is big, but the import substitution product that reached international standards, and the large-tonnage product outlet is arranged.But heavy caliber is that the seamless steel pipe of super-large diameter is hot finished steel pipe at present basically especially, and product surface is coarse, wall unevenness is even, the size scattered error is big, and it is wideless to belong to its application of extra heavy pipe; The fast development of modern industrial technology, more and more higher to quality, the life requirements of product, heavy caliber is that super-large diameter seamless steel pipe of high quality demand is increasing especially, it is widely used in the transport pipeline such as oil, field combustion gas, high-pressure boiler tube, petrochemical industry is used and is managed with pipe, nuclear energy.
Just like dependence on import, particularly nuclear energy all are imports with pipe 99% to the high-grade heavy caliber seamless steel pipe major part of China at present.The seamless steel pipe technology of the top grade that China produces at present is that hot finished steel pipe is through fine finishining and Ageing Treatment destressing.Stock utilization is low only to be 40～50%; And the huge costliness of process equipment, processing difficulties, production efficiency are low, and cost performance is low; Inferior quality, output are very little, far can not satisfy the market demand (high-quality, high-precision heavy caliber cold rolling seamless steel) that enlarges day by day.Basic reason is the cold pilger mill equipment that does not have heavy caliber (containing super-large diameter), can't organize production high accuracy, high-quality heavy caliber cold rolling seamless steel expeditiously.
Heavy caliber cold tube rolling equipment can't be imitated from the equipment expansion of ting model simply, is because the development of last seamless steel pipe industry is not closelyed follow in the development of corresponding mechanical fitting industry on the one hand.On the other hand, large-diameter pipe is because diameter is big, if still press the cooked mode of prior art, the linear velocity at roll arcs of recesses middle raceway and two ends has very big difference, shown in Fig. 5,6, shown in the figure double-roller type, because the radius difference with two ends is bigger in the middle of 1/2 roller, the linear velocity V6 at the linear velocity V5 of its intermediate point 84 and end points 83 places is under the situation of definite value at 1/2 roller rotating speed, has bigger difference.This difference can cause with the pipe amount of plastic deformation of 1/2 roller contact position inhomogeneous, pipe break occurs, wall thickness differs or the unequal problem of pipe each several part density.
Summary of the invention
The present invention is directed to above problem, provide a kind of when rolling large-diameter pipe, roll operates steadily, and the linear velocity difference at roll arcs of recesses middle raceway and two ends is little, thereby avoids pipe to produce the multi-roll large-diameter thin-wall seamless pipe mill of excessive amount of plastic deformation in the axial direction.
Technical scheme of the present invention is: comprise that host header, seamless pipe clamping feeder, plug send return mechanism to; Host header comprises frame, support, be provided with dog in the frame, support is provided with the dog driving mechanism, dog in the frame can move back and forth with respect to support, dog with seamless pipe, plug is concentric is provided with, described dog driving mechanism is provided with the different drive rod of two step velocitys that is synchronized with the movement, and drive rod moves back and forth along the dog axis direction; Described dog is by concentric setting and can constitute along body, the roll stacks of axis relative motion, and body comprises sleeve, secter pat, slideway, adjustment wedge, and roll stacks is made up of saddle and four rolls at least; Saddle is arranged in four rolls on the circumference at least, and the axis of at least four rolls and a described circumference are in same plane and tangent, and saddle also is provided with the frame pin; Slideway, adjustment wedge are fixedly connected in the sleeve, and the slideway end face is arc or broken line shape convex surface, and the bottom surface is adaptive with the adjustment wedge, and the slideway cross section takes the shape of the letter U; Two spindle noses of roll roll with the slideway end face and contact, and roll is arranged in the U-shaped shape chamber of slideway; The secter pat two sides link to each other with adjacent slideway, the side of adjustment wedge respectively, and the secter pat bottom surface links to each other with sleeve interior surface is adaptive, and the secter pat end face is connected with the frame pin slip circle centering of saddle; The different drive rod of described two step velocitys, high-speed driving bar wherein links to each other with body, and the driven at low speed bar links to each other with roll stacks.
The arc of described slideway end face or broken line shape convex surface, according to comprise progressively the revolution section of sending to that rises towards direction of feed, subtract diameter segment, subtract the wall thickness section, expansion section and the inverted cone segment of decline progressively.
Establish 72 ° of five uniform rolls in the described roll stacks, the outline of five rolls is annular distance shape on the axial cross section of roll stacks.
The present invention is provided with at least four rolls, compare with two rollers, three rollers of prior art, the place is little with the radius difference at roller two ends in the middle of the roller, under the certain situation of roller rotating speed, midpoint linear velocity and end points place linear velocity are approaching, in calendering processing, the motive force unanimity that " promotions " plastic zone metal material is mobile makes the uniformity height of pipe microstructure.In addition, according to the positive and negative stroke processing that rolling mill practice proposed, designed and the adaptive slideway of positive and negative stroke processing, have the revolution section of sending to that progressively rises that adapts to calendering processing end face being provided with of slideway, subtract diameter segment, subtract the wall thickness section, expansion section and the inverted cone segment of decline progressively, make roller according to above-mentioned curve in axial back and forth movement, load radial motion, realize positive stroke, return the calendering processing of stroke.In order to guarantee the relative motion between roller and slideway, dog of the present invention is made of body, roll stacks, both are driven respectively by the different drive rod of two step velocitys that is synchronized with the movement, movement velocity is different in the axial direction to be located at roller in intrinsic slideway and the roll stacks, guaranteed the relative motion between roller and slideway, and then guaranteed that roller is relative with the processed pipe sub-surface and roll, because, just can guarantee the quality of steel tube surface only in the relative rollably calendering of roller with steel tube surface.The operation of rolling of the present invention is steady, and precision height, the quality of production tube are good.
Description of drawings
Fig. 1 is the structural representation of dog lateral cross section among the present invention
1 is sleeve among the figure, the 2nd, and secter pat, the 3rd, slideway, the 4th, adjust wedge, the 5th, saddle, the 6th, roller;
Fig. 2 is the structural representation of dog longitudinal cross-section among the present invention
7 is hollow forgings among the figure, the 8th, and deformed area, the 9th, production tube, the 10th, plug, the 11st, drive rod one, the 12nd, drive rod two, a are the revolution sections of sending to, and b subtracts diameter segment, and c subtracts the wall thickness section, d is an expansion section, and e is an inverted cone segment, and V1 is the speed that moves axially of roller, the speed that moves axially of V2 slideway;
Schematic diagram when Fig. 3 is roller of the present invention work
81 is roller end points among the figure, the 82nd, and the roller mid point;
Fig. 4 is the right view of Fig. 3
V3 is a roller dotted line speed among the figure, and V4 is a roller end points linear velocity;
Fig. 5 is the fundamental diagram of 1/2 roller in the prior art
83 is 1/2 roller end points among the figure, and 84 is 1/2 roller mid points;
Fig. 6 is the right view of Fig. 5
V5 is 1/2 roller dotted line speed among the figure, and V6 is 1/2 roller end points linear velocity.
The specific embodiment
As shown in Figure 1, 2, the present invention includes host header, seamless pipe clamping feeder, plug and send return mechanism to; Host header comprises frame, support, be provided with dog in the frame, support is provided with the dog driving mechanism, dog in the frame can move back and forth with respect to support, dog and seamless pipe, plug 10 concentric settings, the dog driving mechanism is provided with the different drive rod of two step velocitys that is synchronized with the movement, and drive rod moves back and forth along the dog axis direction; Dog is by concentric setting and can constitute along body, the roll stacks of axis relative motion, and body comprises sleeve 1, secter pat 2, slideway 3, adjusts wedge 4, and roll stacks is made up of saddle 5 and four rolls 6 at least; Saddle 5 is arranged in four rolls 6 on the circumference at least, and the axis of at least four rolls 6 and a described circumference are in same plane and tangent, and saddle 5 also is provided with the frame pin; Slideway 3, adjustment wedge 4 are fixedly connected in the sleeve 1, and slideway 3 end faces are arc or broken line shape convex surface, and the bottom surface is adaptive with adjustment wedge 4, and slideway 3 cross sections take the shape of the letter U; Two spindle noses of roll 6 roll with slideway 3 end faces and contact, and roll 6 is arranged in the U-shaped shape chamber of slideway 3; Secter pat 2 two sides link to each other with adjacent slideway 3, the side of adjustment wedge 4 respectively, secter pat 2 bottom surfaces and adaptive linking to each other of sleeve 1 inner surface, and secter pat 2 end faces are connected with the frame pin slip circle centering of saddle 5; The different drive rod of described two step velocitys comprises drive rod 1, drive rod 2 12, high-speed driving bar wherein, and promptly drive rod 2 12 links to each other with body, and the driven at low speed bar is that drive rod 1 links to each other with roll stacks.
The arc of slideway 3 end faces or broken line shape convex surface are according to comprise the revolution section of sending to a that progressively rises, the inverted cone segment e that subtracts diameter segment b, subtracts wall thickness section c, expansion section d and progressively descend towards direction of feed.
The outline of establishing 72 ° of uniform 6, five rolls 6 of five rolls in the roll stacks is annular distance shape on the axial cross section of roll stacks.
Operation principle of the present invention is shown in Fig. 2,3,4, drive rod 1, drive rod 2 12 drive roll 6, slideway 3 respectively with the direction motion of different speed to hollow forging 7, because the existence of V1, V2 speed difference, when roll 6 axially moves with respect to slideway, also doing radial motion.Plug plug 10 in the hollow forging 7, upper limb contact hollow forging 7 surfaces of roll 6, at first the contact site forms plastically deforming area 8, after motion surpasses expansion section d, continue motion, behind the arrival inverted cone segment e, hollow forging 7 turns an angle, return, until the revolution section of sending to a, production tube 9 moulding.The advantage of maximum of the present invention is, when increasing roller 6 quantity, reduced the radian of roller 6, makes that linear velocity V4, the V3 of roller end points 81, roller mid point 82 of roller 6 is approaching.Like this, it is also approaching to be carried in its deformed area 8 axial " motive force " when hollow forging 7 plastic deformations, and density, the machine direction of the production tube 9 after the plastic deformation are more even, consistent.
Claims (3)
1, a kind of multi-roll large-diameter thin-wall seamless pipe mill comprises that host header, seamless pipe clamping feeder, plug send return mechanism to; Host header comprises frame, support, be provided with dog in the frame, support is provided with the dog driving mechanism, dog in the frame can move back and forth with respect to support, dog with seamless pipe, plug is concentric is provided with, it is characterized in that described dog driving mechanism is provided with the different drive rod of two step velocitys that is synchronized with the movement, drive rod moves back and forth along the dog axis direction; Described dog is by concentric setting and can constitute along body, the roll stacks of axis relative motion, and body comprises sleeve, secter pat, slideway, adjustment wedge, and roll stacks is made up of saddle and four rolls at least; Saddle is arranged in four rolls on the circumference at least, and the axis of at least four rolls and a described circumference are in same plane and tangent, and saddle also is provided with the frame pin; Slideway, adjustment wedge are fixedly connected in the sleeve, and the slideway end face is arc or broken line shape convex surface, and the bottom surface is adaptive with the adjustment wedge, and the slideway cross section takes the shape of the letter U; Two spindle noses of roll roll with the slideway end face and contact, and roll is arranged in the U-shaped shape chamber of slideway; The secter pat two sides link to each other with adjacent slideway, the side of adjustment wedge respectively, and the secter pat bottom surface links to each other with sleeve interior surface is adaptive, and the secter pat end face is connected with the frame pin slip circle centering of saddle; The different drive rod of described two step velocitys, high-speed driving bar wherein links to each other with body, and the driven at low speed bar links to each other with roll stacks.
2, a kind of multi-roll large-diameter thin-wall seamless pipe mill according to claim 1, it is characterized in that, the arc of described slideway end face or broken line shape convex surface, according to comprise progressively the revolution section of sending to that rises towards direction of feed, subtract diameter segment, subtract the wall thickness section, expansion section and the inverted cone segment of decline progressively.
3, a kind of multi-roll large-diameter thin-wall seamless pipe mill according to claim 1 is characterized in that, establishes 72 ° of five uniform rolls in the described roll stacks, and the outline of five rolls is annular distance shape on the axial cross section of roll stacks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810124265A CN101623704A (en) | 2008-07-07 | 2008-07-07 | Multi-roller large-diameter thin-wall seamless tube rolling mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810124265A CN101623704A (en) | 2008-07-07 | 2008-07-07 | Multi-roller large-diameter thin-wall seamless tube rolling mill |
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| Publication Number | Publication Date |
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| CN101623704A true CN101623704A (en) | 2010-01-13 |
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| CN200810124265A Pending CN101623704A (en) | 2008-07-07 | 2008-07-07 | Multi-roller large-diameter thin-wall seamless tube rolling mill |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059251A (en) * | 2010-08-31 | 2011-05-18 | 吴军 | Four-roll planetary tube hot rolling machine |
| CN103801558A (en) * | 2014-01-27 | 2014-05-21 | 胜利油田康贝石油工程装备有限公司 | Method and device for machining trapezoidal slit of slotted pipe for petroleum |
| CN112222191A (en) * | 2020-09-19 | 2021-01-15 | 太原科技大学 | Six-roller cold rolling mill for difficult-to-deform metal seamless pipe |
| CN112692069A (en) * | 2020-12-30 | 2021-04-23 | 浙江传播者金属装饰材料有限公司 | Rolling mill structure with core rod locking device |
-
2008
- 2008-07-07 CN CN200810124265A patent/CN101623704A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059251A (en) * | 2010-08-31 | 2011-05-18 | 吴军 | Four-roll planetary tube hot rolling machine |
| CN103801558A (en) * | 2014-01-27 | 2014-05-21 | 胜利油田康贝石油工程装备有限公司 | Method and device for machining trapezoidal slit of slotted pipe for petroleum |
| CN103801558B (en) * | 2014-01-27 | 2015-12-30 | 胜利油田康贝石油工程装备有限公司 | Oil the ladder type seam processing method of slot pipe and equipment |
| CN112222191A (en) * | 2020-09-19 | 2021-01-15 | 太原科技大学 | Six-roller cold rolling mill for difficult-to-deform metal seamless pipe |
| CN112692069A (en) * | 2020-12-30 | 2021-04-23 | 浙江传播者金属装饰材料有限公司 | Rolling mill structure with core rod locking device |
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Open date: 20100113 |