CN102873109A - Method for detecting looping table of rolling mill - Google Patents
Method for detecting looping table of rolling mill Download PDFInfo
- Publication number
- CN102873109A CN102873109A CN2012104205567A CN201210420556A CN102873109A CN 102873109 A CN102873109 A CN 102873109A CN 2012104205567 A CN2012104205567 A CN 2012104205567A CN 201210420556 A CN201210420556 A CN 201210420556A CN 102873109 A CN102873109 A CN 102873109A
- Authority
- CN
- China
- Prior art keywords
- center
- looping
- loop back
- back roll
- looping bed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a method for detecting a looping table of a rolling mill. The method comprises the following steps that a looping roller frame is adjusted to be horizontal; a connection line of the center of a looping roller and the center of a hinge pin of a hydraulic cylinder head is adjusted to be vertical to the ground; a distance a between the center of the hydraulic cylinder head and the center of the looping roller, a distance b between the center of the looping roller and the axle center of a looping table frame and a distance c between the axle center of the looping table frame and the center of the hydraulic cylinder head are measured, and an included angle A is calculated according to the law of cosines: a<2> equals to b<2> plus c<2> minus 2bcCosA; and the included angle A is compared with a set angle alpha to judge whether the looping table is qualifiedly installed or not. With the adoption of the method for detecting the looping table of the rolling mill, the installed or changed looping table can be quickly and accurately detected to meet the requirements or not, and thus the loop tension control between rolling mill stands 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 during greater than the second flow of upstream frame, because speed is excessive on the frame of downstream, just with the phenomenon of steel tear fracture.If the second flow of downstream frame is too small, kink will be mentioned.The kink that steadily increases can cause folding with steel.If occured to fold, may enter with three times belt steel thickness next frame with steel, will cause roll breakage or off-axis like this.
Therefore, a kink control must be installed.Kink control sends the speed correction value to the main transmission of all upstream frames.If second flow does not wait between two frames, band steel length will change between frame, thereby causes the height of kink and the variation of angle.By kink control, angle is maintained on the setting value.Any variation of height can cause the velocity variations of all upstream frames immediately.The height of each kink is controlled by the velocity of rotation that changes the upstream frame.The velocity variable of certain frame multiply by the relative damping coefficient of this frame, then feeds back to the reference value of upstream main transmission speed control as deviation.Therefore all contiguous main transmission speed correction values of these frames are correspondingly adjusted.Simultaneously, the strip tension between frame keeps constant.
In order to guarantee constant tension, calculate the tension value of needs according to the frame for movement of every rolling mill looping bed, 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.Usually judge by detection angles α whether every cover milling train looping bed installation is qualified, thereby guarantee whether the strip tension between milling train is constant, and α is inaccurate when detection angles, will produce a very large impact tension force control, specifically following problem can occur:
(1) strip running deviation;
(2) play cover heap steel between milling train;
(3) strip such as breaks, rolls brokenly at the accident between milling train.
Therefore, when changing looping bed, whether qualifiedly must strictly detect the looping bed installation, otherwise will bring very large impact.
Summary of the invention
One of purpose of the present invention provides and a kind ofly can fast, accurately detect the detection method that whether qualified the milling train looping bed install milling train looping bed.
The detection method of a kind of milling train looping bed provided by the invention comprises: be level with the loop back roll frame adjustment;
Be adjusted into the line at loop back roll center and hydraulic cylinder cylinder head bearing pin center perpendicular to the ground;
Measure between hydraulic cylinder cylinder head center and the loop back roll center apart from a, the distance c between the distance b between loop back roll center and the looping bed framework axle center and looping bed framework axle center and the hydraulic cylinder cylinder head center is according to the cosine law: a
2=b
2+ c
2-2bcCosA calculates the size that obtains included angle A;
With included angle A and set angle α contrast, judge whether installation qualification of looping bed.
Further, described is that level comprises with the loop back roll frame adjustment:
Measure first 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;
The loop back roll framework is adjusted level, guarantee fore side and transmission side loop back roll swing arm axis hole Central Symmetry.
Further, described with included angle A and set angle α contrast, judge whether installation qualification comprises looping bed:
When α-1≤A≤α+1, the 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.
Description of drawings
Fig. 1 is that the embodiment of the invention uses simple frock to adjust the structural representation of looping bed;
Fig. 2 is looping bed side view in the embodiment of the invention;
Fig. 3 is embodiment of the 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 the accompanying drawing three.
The specific embodiment
In order to understand the present invention in depth, the present invention is described in detail below in conjunction with drawings and the specific embodiments.
The detection method of a kind of milling train looping bed provided by the invention may further comprise the steps:
Step S1: be level with the loop back roll frame adjustment;
Step S2: be adjusted into the line at loop back roll center and hydraulic cylinder cylinder head bearing pin center perpendicular to the ground;
Step S3: measure between hydraulic cylinder cylinder head center and the loop back roll center apart from a, the distance c between the distance b between loop back roll center and the looping bed framework axle center and looping bed framework axle center and the hydraulic cylinder cylinder head center is according to the cosine law: a
2=b
2+ c
2-2bcCosA calculates the size that obtains included angle A;
Step S4: with included angle A and set angle α contrast, judge whether installation qualification of looping bed.
Wherein, step S1 is that level comprises with the loop back roll frame adjustment:
Step S11: in conjunction with Fig. 1, shown in Figure 2, use theodolite to measure first 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.Such 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
| The measuring position | Transmission side | Fore side |
| The loop back roll gimbal axis | 176.0mm | 176.0mm |
| The loop back roll swing arm | 63.5mm | 64.3mm |
| Loop back roll | 307.2mm | 308.3mm |
Step S12: simple frock 4 is made of portal frame and 5 tons of jacks of 2.5 meters, uses simple frock 4 with 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
| The measuring position | Transmission side | Fore side |
| The loop back roll gimbal axis | 826.2mm | 826.6mm |
| Support arm axis hole center | 500.3mm | 500.8mm |
[0038]
| Loop back roll | 111.0mm | 111.7mm |
Step S2: be adjusted into the line at loop back roll center and hydraulic cylinder cylinder head bearing pin center 5 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, be adjusted into its line of centres 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 center 5 and the loop back roll center.
In conjunction with Fig. 3, shown in Figure 4, step S3 measure between hydraulic cylinder cylinder head center and the loop back roll center apart from a, distance c between distance b between loop back roll center and the looping bed framework axle center and looping bed framework axle center and the hydraulic cylinder cylinder head center is 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 consist of triangle in the projection with ground, theodolite vertical plane, and length relation is measured by theodolite.Hydraulic cylinder cylinder head pin shaft hole center 5 to the loop back roll center be 555.3mm apart from a, loop back roll center to loop back roll gimbal axis center 5 distance b are 750.2mm, distance c between loop back roll gimbal axis and the hydraulic cylinder cylinder head 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 the original equipment structure must guarantee when the α angle was the factors such as assurance loop back roll lowest order, holding fix are accurate, to set the needed fixed value of loop tension, if there is deviation, all corresponding relations will make a mistake in the tension model, to cause kink unstable, even broken belt occur or play cover heap steel.The present embodiment α is 35 °, and concrete criterion is as follows:
When α-1≤A≤α+1, namely during 34 °≤A≤36 °, the looping bed installation qualification.
When A≤α-1 or A 〉=α+1, namely when A≤34 ° or A 〉=36 °, looping bed is installed defective, need to reinstall looping bed.
It is 34.4 ° by calculating angle A, 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 the kink platform of installing or changing fast and accurately when changing looping bed qualified, thereby guarantees the loop tension control between rolling-mill housing.
Above-described embodiment is the better 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 the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (3)
1. the detection method of a milling train looping bed is characterized in that, comprising:
Be level with the loop back roll frame adjustment;
Be adjusted into the line at loop back roll center and hydraulic cylinder cylinder head bearing pin center perpendicular to the ground;
Measure between hydraulic cylinder cylinder head center and the loop back roll center apart from a, the distance c between the distance b between loop back roll center and the looping bed framework axle center and looping bed framework axle center and the hydraulic cylinder cylinder head center is according to the cosine law: a
2=b
2+ c
2-2bcCosA calculates the size that obtains included angle A;
With 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 with the loop back roll frame adjustment:
Measure first 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;
The loop back roll framework is adjusted 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, and is described with included angle A and set angle α contrast, judges whether installation qualification comprises looping bed:
When α-1≤A≤α+1, the 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 | Method for detecting looping table of rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210420556.7A CN102873109B (en) | 2012-10-29 | 2012-10-29 | Method for detecting looping table of rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102873109A true CN102873109A (en) | 2013-01-16 |
| CN102873109B CN102873109B (en) | 2014-12-10 |
Family
ID=47474751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210420556.7A Active CN102873109B (en) | 2012-10-29 | 2012-10-29 | Method for detecting looping table of rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102873109B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105057365A (en) * | 2015-07-21 | 2015-11-18 | 首钢京唐钢铁联合有限责任公司 | Control method for preventing tail flicking in steel-strip precision rolling |
| 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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5453658A (en) * | 1977-10-07 | 1979-04-27 | Hitachi Ltd | Hydraulic looper for tension control |
| JP3049248B1 (en) * | 1999-10-18 | 2000-06-05 | 川崎重工業株式会社 | Looper for rolling mill |
| JP2000211896A (en) * | 1999-01-26 | 2000-08-02 | Tokimec Inc | Angle controlling method and its device |
| 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 |
| JP2010058139A (en) * | 2008-09-02 | 2010-03-18 | Sumitomo Metal Ind Ltd | Method and apparatus for determining contact, method and device for controlling looper, and method and apparatus for manufacturing hot-rolled steel plate |
-
2012
- 2012-10-29 CN CN201210420556.7A patent/CN102873109B/en active Active
Patent Citations (6)
| 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 |
| 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 |
| JP2010058139A (en) * | 2008-09-02 | 2010-03-18 | Sumitomo Metal Ind Ltd | Method and apparatus for determining contact, method and device for controlling looper, and method and apparatus for manufacturing hot-rolled steel plate |
Non-Patent Citations (4)
| Title |
|---|
| 刘立文等: "活套控制技术及应用", 《湖南冶金》 * |
| 李小平: "热轧机活套高度的自动控制", 《太原理工大学学报》 * |
| 赵伟等: "热轧带钢过程控制系统的设计", 《机械工程与自动化》 * |
| 邹俊等: "精轧张力系统的仿真与试验", 《吉林大学学报（工学版）》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105057365A (en) * | 2015-07-21 | 2015-11-18 | 首钢京唐钢铁联合有限责任公司 | Control method for preventing tail flicking in steel-strip precision rolling |
| CN105057365B (en) * | 2015-07-21 | 2016-11-30 | 首钢京唐钢铁联合有限责任公司 | A kind of control method preventing strip steel finish rolling whipping |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102873109B (en) | 2014-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101456039A (en) | Rolling-mill base installation measurement method | |
| CN102240680B (en) | Method for adjusting verticality of rolling mill | |
| CN102950156B (en) | Mounting method of horizontal loop | |
| CN106247999B (en) | The detection method and device of hot-rolled strip roll bearing seat liner plate symmetry | |
| CN108759768A (en) | Rail traffic vehicles car body assembles amount of deflection adjustment amount on-position measure and indicating means | |
| CN104359379A (en) | Measuring tool | |
| CN102873109B (en) | Method for detecting looping table of rolling mill | |
| CN103212584B (en) | Method for controlling off-tracking of band steel of oriented silicon steel ultra-long multi-track horizontal loop | |
| CN205138400U (en) | Leaf spring grasswort testing platform | |
| CN203955727U (en) | A kind of band steel deviation correcting device | |
| CN202511727U (en) | Motion detection apparatus | |
| CN107101565A (en) | Detection method for the depth of parallelism between milling train roller | |
| CN205642211U (en) | Photovoltaic assembly frame detects frock | |
| CN205426172U (en) | Prefabricated wallboard straightness monitoring devices that hangs down | |
| CN103197400A (en) | Right-angle reflecting prism ridge high-precision leveling device and leveling method thereof | |
| CN208140480U (en) | Ring stiffness detection device | |
| CN104132644B (en) | Tunnel cross-section measurement point laying out apparatus and tunnel cross-section measurement point setting out method | |
| CN204564774U (en) | Roller system parallelism detecting device in a kind of frame of multi-roll mill | |
| CN206459604U (en) | Linearity calibration equipment is advised in bobbin-winding machine central shaft positioning of weaving | |
| CN207036586U (en) | A kind of reisilometer detects auxiliary stand with multiple spot | |
| CN202049010U (en) | Steel band tension measuring machine | |
| CN111256904A (en) | Online calibration device and method for tensiometer | |
| CN108592755A (en) | Pinning frame cradle roller positioning rule composition error calibration equipment and method of calibration | |
| CN205825838U (en) | A kind of bearing outer ring radial pulsation measurement device | |
| CN208266347U (en) | Spinning frame jockey pulley pedestal positioning rule composition error calibration equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |