CN103252384B - A kind of bundling skin pass mill group coiler mandrel - Google Patents
A kind of bundling skin pass mill group coiler mandrel Download PDFInfo
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- CN103252384B CN103252384B CN201310232535.7A CN201310232535A CN103252384B CN 103252384 B CN103252384 B CN 103252384B CN 201310232535 A CN201310232535 A CN 201310232535A CN 103252384 B CN103252384 B CN 103252384B
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Abstract
The invention provides a kind of bundling skin pass mill group coiler mandrel, the fanning strip being assemblied in the arc length such as four pieces of outer surfaces on rectangular pyramid by the quartering is formed, fanning strip outer surface is three kinds of different-diameters and five sections of curved-surface structure shapes of the circular arc of decentraction formation, centre is large segmental arc, bilateral symmetry arranges little segmental arc, is connected between large segmental arc with little segmental arc by the transition of transition circle segmental arc; And the reel coil of strip output fanning strip inoperative Duan Weiyi frustum of a cone.The present invention can stop the problem that drum fan-shaped plate scratches coil of strip inner surface completely, eliminate coil of strip again reach the standard grade and the drawback of inner ring scuffing part need be excised, avoid scratching and detaining the loss due to spoiled work remake, while raising coil of strip surface quality and lumber recovery, very big increase Business Economic Benefit, improves the operating rate of unit.
Description
Technical field
The invention belongs to mechanical equipment of steel rolling field, particularly a kind of coiler mandrel of the many geometries outer surface structure for hot-strip bundling skin pass mill group.
Background technology
At present, the skin pass mill that domestic hot-rolled strip production line uses is mostly design abroad, the complete set of equipments that domestic co-production makes, and the design production specification of skin pass mill is: steel plate thickness 1.2 ~ 12.7mm; Width 800 ~ 1630 mm; Maximum volume-weight 30t; Product coil of strip internal diameter specification ф 762mm, coil of strip internal diameter girth is 2393mm.
In equipment debugging and trial production stage, coil of strip unloads in the process of volume automatically at coiler mandrel, there is the phenomenon that drum fan-shaped plate scratches coil of strip inside diameter surface, namely the coil of strip of more than a volume specification 4.0mm thickness is produced or a cut roll is divided into two volumes, three volumes through bundling skin pass mill group, inner ring of steel coil nearly all can produce surface tear, for this product quality defect, home and abroad user is often had to propose quality objection.For this reason, once adopted two kinds of processing methods: one is that coil of strip is reached the standard grade again, excision inner ring has the part of scuffing; Two is that internally to iris wipe wound not bery serious, can only process by the method for deduction inner ring of steel coil weight.Through rough estimates, for 1780 production lines, reach more than 1111 tons because coil of strip internal diameter scratches the coil of strip weight of excising or deduct every year, cause direct economic loss 4,390,000 yuan.Thus cause great economic loss to enterprise, also potentially very large threat is formed to enterprise product follow-up growth commercially simultaneously.
Research is amplified according to the analysis of cumulative data for many years, graphics software graphing, carry out solid modelling analysis discovery by modeling software: coiler mandrel scratches the producing cause of inner ring of steel coil simultaneously, be because the design of reel is unreasonable, reel profile exceeds design specification and project organization and equipment operation process technical requirement and does not mate and cause.
1, reel cylindrical configuration aspects:
The circular configuration of reel is by arc length, isodiametric " fanning strips " such as four pieces, point quartering is assemblied in one " on four bank or ridge ", its radial section outer surface maximum gauge (industry appellation: reel rise footpath) when 762mm, what Theoretical Design and actual state reflected is all a circle (industry appellation: proper circle or positive round), when reel minimum diameter (industry appellation: drum collapsing), " diameter is 737mm " that technical drawing and Technology design specifications provide.Because the arc diameter of drum fan-shaped plate designs and produces by ф 762mm, so when reel is reduced to minimal design diameter ф 737mm, corresponding to a point only in the circular arc of four pieces of fanning strips on separated time, diameter is ф 737mm, and other all position diameter of fanning strip circular arc is all greater than ф 737mm.Therefore, will in appearance distance circular arc branch far away, the phenomenon that diameter dimension is larger, the joint namely after adjacent two pieces of fanning strip undergauges there will be " bulge ", and the circular arc external surface of design specification is then lower than actual " bulge " position.Therefore relatively reduce reel when undergauge and the design gaps of inner ring of steel coil, thus after causing fanning strip undergauge, joint " bulge " scratches the problem of coil of strip inner surface.
2, the contour structures on reel length direction
The production width design specification of bundling skin pass mill group coil of strip is 800 ~ 1630mm, reel is then a design overall length is the cylinder of 2320mm, reel is that in the middle of utilizing, active section batches steel plate, reel two ends are made to have occurred the inoperative section that one section of 345mm is long respectively, not only be equivalent to extend shaping after coil of strip depart from the displacement of reel, add the contact length of reel and inner ring of steel coil, increase the weight of the scuffing degree of inner ring of steel coil.And increase due to reel length, the arm of force increases, reel and main shaft certainly weigh 8.315 tons, lose the condition of support in end under, the gap of spool spindle block bearing must be absorbed.In addition, the rigidity of its main shaft under cantilever position can not keep the levelness of designing requirement, so will inevitably produce sagging under objectively reel cantilever position, so, in the process that the fanning strip of cylinder reel outwards shifts out automatically at coil of strip, the bottom of the fanning strip inoperative section that namely drum fan-shaped plate output is connected with end back shaft will touch inner ring of steel coil, thus causes the phenomenon scratching coil of strip inner surface.
Summary of the invention
Object of the present invention aims to provide one can stop fanning strip scuffing coil of strip inner surface, avoids loss due to spoiled work, reduces costs, improve the hot-strip bundling skin pass mill group coiler mandrel of product surface quality and lumber recovery.
For this reason, the solution that the present invention takes is:
A kind of bundling skin pass mill group coiler mandrel, the fanning strip of the four pieces of identical arc length of outer surface be assemblied on rectangular pyramid by the quartering is formed, described fanning strip outer surface is three kinds of different-diameters and five sections of curved-surface structure shapes of excentric circular arc formation, centre is large segmental arc, bilateral symmetry arranges little segmental arc, is connected between large segmental arc with little segmental arc by the transition of transition circle segmental arc; And the reel coil of strip output fanning strip inoperative Duan Weiyi frustum of a cone.
Described segmental arc arc length broad in the middle accounts for the 60-68% of whole fanning strip outer rim arc length.
Described segmental arc arc diameter broad in the middle and reel footpath of rising is identical.
Described both sides little segmental arc arc diameter is identical with drum collapsing.
Described transition arc radius is 280 ~ 290mm.
Beneficial effect of the present invention is:
The present invention breaches the design philosophy of the single shape of bundling skin pass mill group winding machine reel sector plate outer surface both at home and abroad at present, change drum fan-shaped plate outer surface into multi-face structure by single circular arc, meet coiler mandrel under necking down state with the design gaps of coil of strip internal diameter; In addition the fanning strip inoperative section of reel coil of strip output is changed into the frusto-conical bodily form by cylindrical, the sag of chain produced after end supports is lost in order to absorb reel, therefore the problem that drum fan-shaped plate scratches coil of strip inner surface has been stopped completely, eliminate coil of strip again to reach the standard grade and the drawback that inner ring scuffing part need be excised, avoid and scratch and detain the loss due to spoiled work remake, while raising coil of strip surface quality and lumber recovery, greatly add Business Economic Benefit, improve the operating rate of unit.The present invention has larger popularization space and social application is worth.
Accompanying drawing explanation
Fig. 1 is the reel sectional view under former design undergauge state;
Fig. 2 is the A portion enlarged drawing of Fig. 1;
Fig. 3 is former design reel structure schematic diagram;
Fig. 4 is the reel sectional view under undergauge state of the present invention;
Fig. 5 is the B portion enlarged drawing of Fig. 4;
Fig. 6 is fanning strip outer surface profile schematic diagram under undergauge state of the present invention;
Fig. 7 is reel structure schematic diagram of the present invention.
In figure: fanning strip 1, two fanning strip joint 2, rectangular pyramid 3, bulge 4, former design fanning strip outer surface 5, end backing roll 6, little segmental arc 7, large segmental arc 8, transition circle segmental arc 9, frustum of a cone fanning strip 10.L is fanning strip active section width; L1 is reel output fanning strip inoperative section width; L2 is spool spindle end fanning strip inoperative section width.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
The design production specification of skin pass mill is: width 800 ~ 1630 mm; Maximum volume-weight 30t; Reel footpath (product coil of strip internal diameter) of rising is ф 762 mm, and drum collapsing is ф 737 mm.
As seen from Figure 1, former design bundling skin pass mill group coiler mandrel is mainly made up of the fanning strip 1 of the arc length such as four pieces of outer surfaces, and four pieces of fanning strip 1 quarterings are assemblied on rectangular pyramid 3, form a cylinder reel.The coil of strip output of (see figure 3) reel is provided with end backing roll 6, and the other end is connected with bearing in reduction gears.Former design reel at four pieces of fanning strip 1 outer surfaces that to rise under the state of footpath by circle complete for formation one, therefore when undergauge state, the outer surface of four pieces of fanning strips 1 that outer surface arc radius is constant does not return circle, but forms a bulge 4 protruded at two fanning strip joint 2 places.(see figure 2)
As shown in Figure 4, circular arc single for former design drum fan-shaped plate 1 outer surface changes into by three kinds of different-diameters and five sections of curve forms being formed of the circular arc of decentraction by the present invention, one section longer in the middle of (Fig. 6 can be clearly visible) is large segmental arc 8, one section of bilateral symmetry setting is little segmental arc 7, carries out transition be connected between large segmental arc 8 with little segmental arc 7 by transition circle segmental arc 9.The arc length of segmental arc 8 broad in the middle accounts for 63% of this block fanning strip arc length, and arc diameter and the reel of large segmental arc 8 footpath of rising is identical, is ф 762 mm; The arc diameter of the little segmental arc in both sides 7 is then identical with drum collapsing, is all ф 737 mm.And the arc radius of transition circle segmental arc 9 is 282.55mm, so that large smoothly transitting between segmental arc 8 and little segmental arc 7.
Simultaneously, as can be seen from Figure 3, former design reel is a cylinder designing that overall length is 2320 mm, reel only utilizes middle active section width L to batch steel plate, two ends and reel output inoperative section width L1 and spool spindle end inoperative section width L2 do not participate in and batch, and very easily scrape steel-reel damage inner surface on the contrary.For this reason, the present invention, by the inoperative section outer end adduction of the reel coil of strip output fanning strip 1 near backing roll 6 side, end, makes it to have become the frustum of a cone from cylinder.(see figure 7) thus both can alleviate tip section weight, reduces sag of chain; Fanning strip 1 inoperative section lower end can be effectively avoided again to scratch coil of strip inner surface.
Claims (5)
1. a bundling skin pass mill group coiler mandrel, comprise the fanning strip active section that the quartering is assemblied in four pieces of identical arc length of outer surface on rectangular pyramid, it is characterized in that, described fanning strip active section outer surface is three kinds of different-diameters and five sections of curved-surface structure shapes of excentric circular arc formation, centre is large segmental arc, bilateral symmetry arranges little segmental arc, is connected between large segmental arc with little segmental arc by the transition of transition circle segmental arc; And the reel coil of strip output fanning strip inoperative Duan Weiyi frustum of a cone.
2. bundling skin pass mill group coiler mandrel according to claim 1, is characterized in that, described large segmental arc arc length accounts for the 60-68% of whole fanning strip active section outer rim arc length.
3. bundling skin pass mill group coiler mandrel according to claim 1, is characterized in that, described large segmental arc arc diameter and reel footpath of rising is identical.
4. bundling skin pass mill group coiler mandrel according to claim 1, is characterized in that, described little segmental arc arc diameter is identical with drum collapsing.
5. bundling skin pass mill group coiler mandrel according to claim 1, is characterized in that, described transition arc radius is 280 ~ 290mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310232535.7A CN103252384B (en) | 2013-06-11 | 2013-06-11 | A kind of bundling skin pass mill group coiler mandrel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310232535.7A CN103252384B (en) | 2013-06-11 | 2013-06-11 | A kind of bundling skin pass mill group coiler mandrel |
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| CN103252384A CN103252384A (en) | 2013-08-21 |
| CN103252384B true CN103252384B (en) | 2015-08-05 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107838223A (en) * | 2016-09-19 | 2018-03-27 | 宝钢工程技术集团有限公司 | Diameter increasing sleeve cylinder for the rolling steel coil with inner ring discount |
| CN113118240A (en) * | 2021-04-23 | 2021-07-16 | 武汉钢铁有限公司 | Coiler mandrel capable of preventing strip steel from being clamped |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57154323A (en) * | 1981-03-20 | 1982-09-24 | Nippon Steel Corp | Mandrel for down coiler |
| JP2679001B2 (en) * | 1992-12-28 | 1997-11-19 | 川崎製鉄株式会社 | Rubber sleeve for winding metal band |
| CN201791774U (en) * | 2010-09-08 | 2011-04-13 | 鞍钢股份有限公司 | Mandrel of strip steel coiler |
| CN202180109U (en) * | 2011-06-29 | 2012-04-04 | 鞍钢股份有限公司 | Coiler mandrel for preventing inner ring of steel coil from being scratched |
| CN102536627B (en) * | 2012-03-15 | 2015-04-22 | 武汉船用机械有限责任公司 | Shell for low-pressure large-discharge capacity blade hydraulic motor |
| CN202762770U (en) * | 2012-07-25 | 2013-03-06 | 上海亿富特钢铁技术有限公司 | Asymmetric positioning curved surface structure for reducing roll inlet position imprints in metal band rolling |
| CN203330174U (en) * | 2013-06-11 | 2013-12-11 | 鞍钢股份有限公司 | Coiler mandrel of coil-dividing leveling unit |
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