CN102873109B - Detection method for loop table of rolling mill - Google Patents
Detection method for loop table of rolling mill Download PDFInfo
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- CN102873109B CN102873109B CN201210420556.7A CN201210420556A CN102873109B CN 102873109 B CN102873109 B CN 102873109B CN 201210420556 A CN201210420556 A CN 201210420556A CN 102873109 B CN102873109 B CN 102873109B
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- loop back
- back roll
- loop
- looping bed
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 238000005096 rolling process Methods 0.000 title abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 17
- 238000003801 milling Methods 0.000 claims description 15
- 238000011007 installation qualification Methods 0.000 claims description 10
- 230000002950 deficient Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
Discloses a detection method of a loop platform of a rolling mill, which comprises the following steps: adjusting the loop roller frame to be horizontal; adjusting a connecting line between the center of the loop roller and the center of the pin shaft of the cylinder head of the hydraulic cylinder to be vertical to the ground; measuring the distance a between the center of the pin shaft of the cylinder head of the hydraulic cylinder and the center of the loop roller, the distance b between the center of the loop roller and the axis of the loop table frame and the distance c between the axis of the loop table frame and the center of the pin shaft of the cylinder head of the hydraulic cylinder according to the cosine law: a is2＝b2+c2Calculating to obtain the size of the included angle A by using-2 bcCosA; and comparing the included angle A with a set angle alpha, and judging whether the loop platform is installed qualified. The detection method of the loop platform of the rolling mill can quickly and accurately detect whether the installed or replaced loop platform meets the requirements when the loop platform is replaced, so that the loop tension control between the rolling mill frames is ensured.
Description
Technical field
The present invention relates to steel rolling specific purpose tool detection technique field, specifically a kind of detection method of milling train looping bed.
Background technology
A kink is installed between each finishing stand, and guaranteeing has a suitable tension force with steel between any two finishing stands.Owing to there being excessive tension force, it is in order to prevent the necking down with steel that kink is installed.Overtension can be with steel to break the most at last.When the second flow of downstream frame is greater than the second flow of upstream frame, because speed in the frame of downstream is excessive, just with the phenomenon of steel tear fracture.If the second flow of downstream frame is too small, kink will be mentioned.The kink steadily increasing can cause folding with steel.If occurred to fold, with steel, may enter with the belt steel thickness of three times next frame, will cause roll breakage or off-axis like this.
Therefore, a kink must be installed controls.Kink is controlled the main transmission that speed correction value is sent to all upstreams frame.If second flow is not etc. between two frames, between frame, is with steel length to change, thereby causes the height of kink and the variation of angle.By kink, control, angle is maintained in a setting value.Any variation of height can cause the velocity variations of all upstreams frame immediately.The height of each kink is controlled by changing the velocity of rotation of upstream frame.The velocity variable of certain frame is multiplied by the relative damping coefficient of this frame, then as deviation, feeds back to the reference value that main transmission speed in upstream is controlled.Therefore the main transmission speed correction value of all vicinities of these frames is correspondingly adjusted.Meanwhile, the strip tension between frame keeps constant.
In order to guarantee constant tension, according to the frame for movement of every rolling mill looping bed, calculate the tension value needing, the frame for movement of every rolling mill is different, cylinder diameter is also different, for guarantee calculated value accurately, each position angle that frame for movement is installed, that length must guarantee is qualified.Conventionally by detection angles α, judge whether every cover milling train looping bed installation is qualified, thereby guarantee that whether the strip tension between milling train is constant, when detection angles, α is inaccurate, will tension force be controlled and be produced a very large impact, and specifically there will be following problem:
(1) strip running deviation;
(2) between milling train, play cover heap steel;
(3) between milling train, strip such as breaks, rolls brokenly at the accident.
Therefore,, when changing looping bed, whether qualifiedly must strictly detect looping bed installation, otherwise will bring very large impact.
Summary of the invention
One of object of the present invention is to provide a kind of detection method that can fast, accurately detect the whether qualified milling train looping bed of milling train looping bed installation.
The detection method of a kind of milling train looping bed provided by the invention comprises: by loop back roll frame adjustment, be level;
The line at loop back roll center and hydraulic cylinder cylinder head bearing pin center is adjusted into perpendicular to the ground;
Measure the distance a between hydraulic cylinder cylinder head bearing pin center and loop back roll center, the distance c between the distance b between loop back roll center and looping bed framework axle center and looping bed framework axle center and hydraulic cylinder cylinder head bearing pin center, according to the cosine law: a
2=b
2+ c
2-2bcCosA calculates the size that obtains included angle A;
By included angle A and set angle α contrast, judge whether installation qualification of looping bed.
Further, described is that level comprises by loop back roll frame adjustment:
First measure the depth of parallelism of fore side and transmission side baffle plate and loop back roll swing arm, guarantee that fore side and transmission side baffle plate upper pin centre bore overlap;
Loop back roll framework is adjusted to level, guarantee fore side and transmission side loop back roll swing arm axis hole Central Symmetry.
Further, described by included angle A and set angle α contrast, judge whether installation qualification comprises looping bed:
When α-1≤A≤α+1, looping bed installation qualification;
When A < α-1 or A> α+1, looping bed is installed defective.
Whether the detection method of a kind of milling train looping bed provided by the invention can detect fast and accurately the kink platform of installing or changing and meet the requirements when changing looping bed, thereby guarantees the loop tension control between rolling-mill housing.
Accompanying drawing explanation
Fig. 1 is that the embodiment of the present invention is used simple frock to adjust the structural representation of looping bed;
Fig. 2 is looping bed side view in the embodiment of the present invention;
Fig. 3 is embodiment of the present invention loop back roll and axle and hydraulic cylinder baffle angle position, distribution of lengths schematic diagram;
Fig. 4 is the trigonometric function graph of the gained of structure projection shown in accompanying drawing three.
The specific embodiment
In order to understand the present invention in depth, below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
The detection method of a kind of milling train looping bed provided by the invention comprises the following steps:
Step S1: be level by loop back roll frame adjustment;
Step S2: the line at loop back roll center and hydraulic cylinder cylinder head bearing pin center is adjusted into perpendicular to the ground;
Step S3: measure the distance a between hydraulic cylinder cylinder head bearing pin center and loop back roll center, the distance c between the distance b between loop back roll center and looping bed framework axle center and looping bed framework axle center and hydraulic cylinder cylinder head bearing pin center, according to the cosine law: a
2=b
2+ c
2-2bcCosA calculates the size that obtains included angle A;
Step S4: by included angle A and set angle α contrast, judge whether installation qualification of looping bed.
Wherein, step S1 is that level comprises by loop back roll frame adjustment:
Step S11: shown in Fig. 1, Fig. 2, use theodolite first to measure the depth of parallelism of fore side baffle plate and transmission side baffle plate 1 and loop back roll swing arm, guarantee that fore side baffle plate and transmission side baffle plate 1 upper pin centre bore overlap, and guarantee that loop back roll roll surface absolute altitude is consistent.As loop back roll gimbal axis, loop back roll swing arm, the transmission side of loop back roll and the absolute altitude of fore side of table for measuring.
Table one
| Measuring position | Transmission side | Fore side |
| Loop back roll gimbal axis | 176.0mm | 176.0mm |
| Loop back roll swing arm | 63.5mm | 64.3mm |
| Loop back roll | 307.2mm | 308.3mm |
Step S12: simple frock 4 consists of portal frame and 5 tons of jacks of 2.5 meters, is used simple frock 4 by loop back roll gimbal axis 2 adjustment levels, guarantees fore side and transmission side loop back roll swing arm axis hole Central Symmetry.Utilize spirit level to measure the absolute altitude of loop back roll gimbal axis 2, loop back roll swing arm axis hole center, loop back roll 3.By the data that record, fore side and transmission side are basically identical, thereby guarantee that loop back roll swing arm, loop back roll integral installation registration are true.Loop back roll gimbal axis, support arm axis hole center, loop back roll three's transmission side and the absolute altitude of fore side of table two for measuring.
Table two
| Measuring position | Transmission side | Fore side |
| Loop back roll gimbal axis | 826.2mm | 826.6mm |
| Support arm axis hole center | 500.3mm， | 500.8mm |
| Loop back roll | 111.0mm | 111.7mm |
Step S2: the line at loop back roll center and hydraulic cylinder cylinder head bearing pin center 5 is adjusted into specifically perpendicular to the ground: utilize the suspender of portal frame to adjust loop back roll center and hydraulic cylinder cylinder head bearing pin center 5, its line of centres is adjusted into perpendicular to the ground.Like this, next step elevation difference with transit survey loop back roll center and hydraulic cylinder cylinder head bearing pin center 5 is the distance between hydraulic cylinder cylinder head bearing pin center 5 and loop back roll center.
Shown in Fig. 3, Fig. 4, step S3 measures the distance a between hydraulic cylinder cylinder head bearing pin center and loop back roll center, distance c between distance b between loop back roll center and looping bed framework axle center and looping bed framework axle center and hydraulic cylinder cylinder head bearing pin center 5, according to the cosine law: a
2=b
2+ c
2the size that-2bcCosA calculate to obtain included angle A is specifically:
As shown in Figure 4, a, b, each line of c form triangle in the projection with ground, theodolite vertical plane, and length relation is measured by theodolite.Hydraulic cylinder cylinder head pin shaft hole center is 555.3mm to the distance a at loop back roll center, loop back roll center to loop back roll gimbal axis centre distance b be 750.2mm, distance c between loop back roll gimbal axis center and hydraulic cylinder cylinder head bearing pin center 5 is 260mm, according to calculating according to the triangle cosine law: the cosine law: a
2=b
2+ c
2-2bcCosA, calculating and obtaining A is 34.4 °.
Step S4 is included angle A and set angle α contrast, judges whether installation qualification of looping bed.Because the geometrical relationship that when α angle is the factors such as assurance loop back roll lowest order, holding fix are accurate, original equipment structure must guarantee, to set the needed fixed value of loop tension, if there is deviation, in tension model, all corresponding relations will make a mistake, to cause kink unstable, and broken belt even occur or play cover heap steel.The present embodiment α is 35 °, and concrete criterion is as follows:
When α-1≤A≤α+1, during 34 °≤A≤36 °, looping bed installation qualification.
When A < α-1 or A> α+1, when 34 ° of A < or A>36 °, looping bed is installed defective, need to reinstall looping bed.
By calculating angle A, it is 34.4 °, so the present embodiment looping bed installation qualification.
Whether the detection method of a kind of milling train looping bed provided by the invention can detect fast and accurately the kink platform of installing or changing when changing looping bed qualified, thereby guarantees the loop tension control between rolling-mill housing.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (3)
1. a detection method for milling train looping bed, is characterized in that, comprising:
By loop back roll frame adjustment, it is level;
The line at loop back roll center and hydraulic cylinder cylinder head bearing pin center is adjusted into perpendicular to the ground;
Measure the distance a between hydraulic cylinder cylinder head bearing pin center and loop back roll center, the distance c between the distance b between loop back roll center and looping bed framework axle center and looping bed framework axle center and hydraulic cylinder cylinder head bearing pin center, according to the cosine law: a
2=b
2+ c
2-2bcCosA calculates the size that obtains included angle A;
By included angle A and set angle α contrast, judge whether installation qualification of looping bed.
2. the detection method of milling train looping bed as claimed in claim 1, is characterized in that, described is that level comprises by loop back roll frame adjustment:
First measure the depth of parallelism of fore side and transmission side baffle plate and loop back roll swing arm, guarantee that fore side and transmission side baffle plate upper pin centre bore overlap;
Loop back roll framework is adjusted to level, guarantee fore side and transmission side loop back roll swing arm axis hole Central Symmetry.
3. the detection method of milling train looping bed as claimed in claim 2, is characterized in that, described by included angle A and set angle α contrast, judges whether installation qualification comprises looping bed:
When α-1≤A≤α+1, looping bed installation qualification;
When A < α-1 or A> α+1, looping bed is installed defective.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210420556.7A CN102873109B (en) | 2012-10-29 | 2012-10-29 | Detection method for loop table of rolling mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210420556.7A CN102873109B (en) | 2012-10-29 | 2012-10-29 | Detection method for loop table of rolling mill |
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| CN102873109A CN102873109A (en) | 2013-01-16 |
| CN102873109B true CN102873109B (en) | 2014-12-10 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105057365B (en) * | 2015-07-21 | 2016-11-30 | 首钢京唐钢铁联合有限责任公司 | Control method for preventing strip steel finish rolling drift |
| CN113522989A (en) * | 2020-04-21 | 2021-10-22 | 宝山钢铁股份有限公司 | Dynamic sleeve falling control method for loop of hot continuous rolling mill |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3049248B1 (en) * | 1999-10-18 | 2000-06-05 | 川崎重工業株式会社 | Looper for rolling mill |
| CN2576364Y (en) * | 2002-09-19 | 2003-10-01 | 中国第二重型机械集团公司 | Segmented roller detachable sleeve |
| CN201249197Y (en) * | 2008-06-24 | 2009-06-03 | 宝山钢铁股份有限公司 | On-line detecting device of a precision rolling looper roll of a hot strip mill |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5453658A (en) * | 1977-10-07 | 1979-04-27 | Hitachi Ltd | Hydraulic looper for tension control |
| JP2000211896A (en) * | 1999-01-26 | 2000-08-02 | Tokimec Inc | Angle controlling method and its device |
| JP5098903B2 (en) * | 2008-09-02 | 2012-12-12 | 住友金属工業株式会社 | Contact determination method and contact determination device, looper control method and looper control device, hot rolled steel sheet manufacturing method and hot rolled steel sheet manufacturing apparatus |
-
2012
- 2012-10-29 CN CN201210420556.7A patent/CN102873109B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3049248B1 (en) * | 1999-10-18 | 2000-06-05 | 川崎重工業株式会社 | Looper for rolling mill |
| CN2576364Y (en) * | 2002-09-19 | 2003-10-01 | 中国第二重型机械集团公司 | Segmented roller detachable sleeve |
| CN201249197Y (en) * | 2008-06-24 | 2009-06-03 | 宝山钢铁股份有限公司 | On-line detecting device of a precision rolling looper roll of a hot strip mill |
Non-Patent Citations (7)
| Title |
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| 刘立文等.活套控制技术及应用.《湖南冶金》.2005,第33卷(第4期),第12-16页. * |
| 李小平.热轧机活套高度的自动控制.《太原理工大学学报》.2002,第33卷(第5期),第513-516页. * |
| 活套控制技术及应用;刘立文等;《湖南冶金》;20050731;第33卷(第4期);第12-16页 * |
| 热轧带钢过程控制***的设计;赵伟等;《机械工程与自动化》;20080630(第3期);第129-131页 * |
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