CN114309075A - Head plate shearing method of flying shears for slitting - Google Patents
Head plate shearing method of flying shears for slitting Download PDFInfo
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- CN114309075A CN114309075A CN202210091357.XA CN202210091357A CN114309075A CN 114309075 A CN114309075 A CN 114309075A CN 202210091357 A CN202210091357 A CN 202210091357A CN 114309075 A CN114309075 A CN 114309075A
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Abstract
The invention relates to the technical field of steel rolling, and particularly discloses a head plate shearing method of a flying shear for slitting, which comprises the following steps of 1) designing and installing a supporting guide comb on a lower rotary drum; 2) an outlet idler roller is eliminated, an outlet bearing guide comb is designed and manufactured, and the angle of the bearing guide comb is controlled to be an included angle of less than 30 degrees with the horizontal plane, so that the plate head of the steel plate is gradually lifted; 3) adjusting the pre-swing position of the flying shear, adjusting the included angle of the initial position of a shear blade from the outlet side to 167 degrees from 30 degrees with the horizontal plane, reducing the energy storage angle of the corresponding flying shear shearing swing from 330 degrees to 193 degrees, and checking the acceleration capability of the flying shear; 4) the total shearing time is reduced to 3s, the shortest shearing length is shortened to 4.5m, and the capacity of shearing a 7m head plate is completely realized; according to the invention, the flying shear structure is improved, the pre-positioning of the flying shear is adjusted in advance, the shearing time is shortened, the shortest head plate shearing of 5 meters is realized, the head plate shearing requirement of the roll-rolling of the furnace roll production line is met, and the roll-rolling capability of the furnace roll production line is improved.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a head plate shearing method of a flying shear for slitting.
Background
The drum flying shears arranged behind the rolling mill in the furnace coil production line are used for splitting uncoiled steel plates, meet the length requirement of an upper plate of a cooling bed, are limited to a coiling and rolling process and the structural characteristics of the flying shears, and cannot shear a coiling and rolling head plate with the length of about 7 m. The plate type of the head plate of the rolling mill is poor, when the head plate passes through a flying shear, in order to avoid a steel plate buckle from drilling a trench, the front roller way and the rear roller way of the flying shear are close to a lower rotary drum of the flying shear as far as possible, the distance between the roller ways is shortened, after the head of a steel plate passes through the rotary drum, the swing roller way falls down under the driving of a hydraulic cylinder, and the transverse roller way is far away from the rotary drum, so that a shear blade rotation space is reserved, the process needs 8s of time, then the rotary drum rotates, the pre-swing position of the shear blade needs 5s, the pre-swing position starts shearing needs 5s, when the steel plate is rolled at a constant speed of 1.5m/s, the head plate is prepared for shearing from the flying shear, and after 18s of time, the shortest head plate which can only be 27m can be cut, and the head plate of 7m cannot be cut.
The quality of the head plate shape of the rolled plate does not reach the standard, the head plate shape and the thickness of the rolled plate are cut off by a sizing shear after reaching the tail end of a finishing line, the head plate shape and the thickness of the head plate are cut off, the head plate is reversed, trimming is carried out by a circle shear or a bilateral shear, finishing collection is carried out in the head plate cutting process, pause waiting is carried out, and the rolled plate cannot be continuously rolled after a cold bed steel plate is full due to the fact that the rolled plate is very fast in speed, the rolled plate can only be paused, and the performance of the rolling capacity is affected. If the head board can cut off in advance at the flying shear department, the head board can directly pass through the finishing, and the finishing is collected and is not waited for, and efficiency can show to be improved, rolls up the ability and just can realize promoting by a wide margin. Therefore, a head plate shearing method of a flying shear for slitting needs to be designed, and the problems that the head plate shearing length of the existing mill flying shear is long and the rolling capability is affected are solved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a head plate shearing method of a flying shear for slitting.
The technical scheme adopted by the invention for solving the technical problems is as follows: a head plate shearing method of a flying shear for slitting comprises the following steps:
step 1) designing and installing a supporting guide comb on a lower rotary drum, guiding a plate head by the supporting guide comb and lifting to reduce downward deflection of a steel plate, wherein the plate head of the steel plate smoothly reaches an outlet roller way;
step 2) opening a rotation space for giving out flying shears from the front roller way and the rear roller way, according to the structural space of the existing equipment, eliminating an outlet idler roller, designing and manufacturing a bearing guide comb, and controlling the angle of the bearing guide comb to be an included angle of less than 30 degrees with the horizontal plane so as to gradually lift the plate head of the steel plate;
step 3) adjusting the pre-swing position of the flying shear, adjusting the included angle of the initial position of a shear blade from the outlet side to the horizontal plane to be 30 degrees to 167 degrees, reducing the corresponding energy storage angle of the shearing swing of the flying shear from 330 degrees to 193 degrees, and checking the acceleration capability of the flying shear;
and 4) because the scanning angle of the shearing edge is reduced, the shearing speed is still kept synchronous with that of the rolling mill, the shearing acceleration of the flying shear is adaptively increased, the total shearing time is reduced to 3s, the shortest shearing length is detected to be 4.5m, and the capacity of shearing a 7m head plate is completely realized.
Specifically, be equipped with upper fixed plate and two side fixed plates on the support guide comb in step 1), upper fixed plate and two side fixed plates closely laminate with lower drum to fixed through bolt or fixed pin, can play the anti-shear effect, support the outer arc of guide comb and go up the drum concentricity, can play the support by the arbitrary angle, for avoiding supporting guide comb fish tail steel sheet, support the design of guide comb peak and be less than roll surface elevation 30 mm.
Specifically, the lower rotary drum in the step 1) is subjected to 42CrMo quenching and tempering, the strength of the drilled lower rotary drum is subjected to modeling analysis by using finite elements, the stress and the strain have enough safety factors, the connection strength of the support guide comb and the rotary drum is calculated, and the resultant force action of shearing impact, plate head impact and centrifugal force can be borne.
Specifically, the carrying guide combs in the step 2) are arranged on the front side and the rear side of the swinging roller way through a roller way frame, the carrying guide combs are provided with an upward inclination angle within 30 degrees, a steel plate can be gradually lifted under the guide of the carrying guide combs even if the head is knocked after the supporting guide combs are passed, and a trench cannot be drilled through the first translation roller way at the outlet; after the guide comb is received between the swing roller way and the translation roller way, the roller way frame is permanently fixed on three degrees of freedom by adopting a welding mode, and after the swing roller way is fixed, 12 sets of hydraulic cylinders, magnetic rulers, valve tables and hydraulic servo systems can be abandoned and removed.
Specifically, after the flying shears in the step 3) are adjusted and pre-positioned, the lower plane of the upper rotating drum tilts forward, a bell mouth channel with a large inlet and a small outlet is constructed, the pre-positioning is beneficial to passing of a warped steel plate, and the pre-positioning is carried out before the steel plate arrives, so that the shearing preparation time is not occupied.
The invention has the following beneficial effects:
according to the head plate shearing method of the flying shears for slitting, which is designed by the invention, the structure of the flying shears is improved, the pre-positioning of the flying shears is adjusted in advance, the shearing time is shortened, the shortest head plate shearing of 5 meters is realized, the head plate shearing requirement of a roll-rolling head plate of a furnace roll production line is met, and the roll-rolling capacity of the furnace roll production line is improved;
1. according to the original scheme, the steel plate can be cut and only can be cut after passing through the center line of the flying shear, the cutting can be started at any time by the method, not only can the cutting be performed, but also the rolling head plate of 7m can be cut, and the continuous rolling capability of a production line is improved;
2. after the front and rear roller ways are fixedly cut, 12 hydraulic cylinders for driving the roller ways to act and a servo hydraulic system are abandoned, so that a fault source is eliminated, the equipment is more stable to operate, spare parts and maintenance cost are saved, and the power consumption of the hydraulic system is saved;
3. the head plate type wave of the limited thin steel plate is very serious, after the pre-swing position is adjusted, the plane part of the upper rotary drum and the roller way form a bell mouth, the passing performance of the steel plate is better, and the steel is prevented from being blocked and stacked at the position;
4. the combination of the supporting guide comb and the receiving guide comb thoroughly eliminates the risk of severe trench drilling caused by steel plate knocking.
Drawings
Fig. 1 is a schematic view of a mounting structure of a support guide comb.
Fig. 2 is a schematic view of an installation structure of a support guide comb and a receiving guide comb.
FIG. 3 is a side view of a mounting structure supporting a guide comb and receiving a guide comb.
In the figure: 1-supporting a guide comb; 2-upper rotary drum; 3, fixing the plate; 4-side fixing plate; 5-carrying guide combs; 6-swinging a roller way; 7-translation roller bed; 8-roller bed frame.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in further detail in the following clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figures 1-3, in a head plate cutting method of a flying shear for splitting, the cutting preparation time must be reduced to be within 4.7s from the current 18s to realize the function of cutting a 7m head plate. The step of roller way movement must be cancelled, the solution is to pull open the roller way interval before and after the flying shear, let out the shear blade gyration space, then the fixed roller way, after the roller way interval before and after the flying shear increases, increase the transition on the lower drum 2 of the flying shear and support the guide comb 1 and lift the steel sheet, increase the accepting guide comb 5 that makes the inclined plane at the exit roller way entry, accept the steel sheet and pass through smoothly, this measure can reduce 10s preparation time, the remaining 8s is through adjusting the pre-swing position of the upper drum 2, increase the shearing acceleration, carry on the pressure reduction in advance in the pre-swing position, reach within 4.7 s.
The detailed scheme is as follows:
1. the lower rotary drum 2 is provided with a support guide comb 1, the support guide comb 1 is designed into a saddle shape, and three planes are tightly attached to the lower rotary drum 2, so that the shear resistance effect can be achieved; the lower rotary drum 2 is subjected to 42CrMo quenching and tempering treatment, the welding performance is poor, welding stress is easily generated during welding, the fatigue strength of the rotary drum body is greatly reduced, and in order to avoid the adverse effect of welding on the fatigue strength of the lower rotary drum 2, bolts and positioning pins are adopted to fix the support guide comb 1; modeling analysis is carried out on the strength of the lower rotary drum 2 after drilling by using finite elements, both the stress and the strain have enough safety factors, the connection strength of the support guide comb 1 and the lower rotary drum 2 is calculated, and the combined force effects of shearing impact, plate head impact, centrifugal force and the like can be borne; the supporting guide comb 1 plays a role in guiding the plate head and lifting to reduce downwarping so that the plate head can smoothly reach the outlet roller way; the outer circular arc of the supporting guide comb 1 is concentric with the lower rotating drum 2, the supporting guide comb can support at any angle, and in order to avoid the supporting guide comb 1 from scratching the steel plate, the highest point of the supporting guide comb 1 is designed to be lower than the roller surface elevation by 30 mm.
2. The front roller way and the rear roller way are provided with a space for giving out flying shear rotation, an outlet idler roller is omitted according to the structural space of the existing equipment, an outlet carrying guide comb 5 is designed and manufactured, the angle of the carrying guide comb 5 is controlled to be an included angle of less than 30 degrees with the horizontal plane, a steel plate can be gradually raised under the guide of the carrying guide comb 5 even if the head is knocked after the steel plate passes through a supporting guide comb 1, and a trench cannot be drilled through a first translation roller way 7 at the outlet; after the guide comb 5 is received between the swing roller way 6 and the translation roller way 7, the roller way frame 8 is permanently fixed on three degrees of freedom by adopting a welding mode, and after the roller way is fixed, 12 sets of hydraulic cylinders, magnetic rulers, valve tables and hydraulic servo systems can be abandoned and removed.
3. And adjusting the pre-swing position of the flying shear, adjusting the included angle of the initial position of the shear blade from the outlet side to 167 degrees with the horizontal plane, reducing the energy storage angle of the shearing swing of the corresponding flying shear from 330 degrees to 193 degrees, and checking that the accelerating capacity of the flying shear is enough. After the pre-swing position is adjusted, the lower plane of the upper rotary drum tilts forward, a horn mouth channel with a large inlet and a small outlet is constructed, the pre-swing position is more favorable for a tilting steel plate to pass through, and the pre-swing position can be carried out before the steel plate arrives without occupying the shearing preparation time. Because the scanning angle of the shearing edge is reduced, the shearing speed is still kept synchronous with that of the rolling mill, the shearing acceleration of the flying shear is adaptively increased, the total shearing time is reduced to 3s, the shortest shearing length can reach 4.5m, and the capacity of shearing a 7m head plate is completely realized.
According to the head plate shearing method of the flying shears for slitting, the flying shear structure is improved, the pre-positioning of the flying shears is adjusted in advance, the shearing time is shortened, the shortest head plate shearing of 5 meters is realized, the head plate shearing requirement of a roll-rolling head plate of a furnace roll production line is met, and the roll-rolling capacity of the furnace roll production line is improved.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (5)
1. A head plate shearing method of a flying shear for slitting is characterized by comprising the following steps:
step 1) designing and installing a supporting guide comb on a lower rotary drum, guiding a plate head by the supporting guide comb and lifting to reduce downward deflection of a steel plate, wherein the plate head of the steel plate smoothly reaches an outlet roller way;
step 2) opening a rotation space for giving out flying shears from the front roller way and the rear roller way, according to the structural space of the existing equipment, eliminating an outlet idler roller, designing and manufacturing a bearing guide comb, and controlling the angle of the bearing guide comb to be an included angle of less than 30 degrees with the horizontal plane so as to gradually lift the plate head of the steel plate;
step 3) adjusting the pre-swing position of the flying shear, adjusting the included angle of the initial position of a shear blade from the outlet side to the horizontal plane to be 30 degrees to 167 degrees, reducing the corresponding energy storage angle of the shearing swing of the flying shear from 330 degrees to 193 degrees, and checking the acceleration capability of the flying shear;
and 4) because the scanning angle of the shearing edge is reduced, the shearing speed is still kept synchronous with that of the rolling mill, the shearing acceleration of the flying shear is adaptively increased, the total shearing time is reduced to 3s, the shortest shearing length is detected to be 4.5m, and the capacity of shearing a 7m head plate is completely realized.
2. The head plate shearing method of a flying shear for slitting as claimed in claim 1, wherein the supporting guide comb in step 1) is provided with an upper fixing plate and two side fixing plates, the upper fixing plate and the two side fixing plates are tightly attached to the lower rotating drum and fixed by bolts or fixing pins, so that the supporting guide comb can resist shearing, the outer arc of the supporting guide comb is concentric with the upper rotating drum, the supporting guide comb can support at any angle, and the highest point of the supporting guide comb is designed to be lower than the roller surface elevation by 30mm in order to avoid scratching the steel plate by the supporting guide comb.
3. The head plate shearing method of a flying shear for slitting according to claim 1, wherein the lower rotary drum in the step 1) is subjected to 42CrMo quenching and tempering, strength after drilling of the lower rotary drum is modeled and analyzed by using finite elements, stress and strain have enough safety factors, the connection strength of the supporting guide comb and the rotary drum is calculated, and the combined force action of shearing impact, plate head impact and centrifugal force can be borne.
4. The method for shearing the head plate of the flying shear for slitting as claimed in claim 1, wherein the receiving guide combs in the step 2) are installed on the front and rear sides of the swing roller table through a roller table frame, and the receiving guide combs are provided with an upward inclination angle within 30 degrees, so that after the steel plate is supported by the guide combs, the steel plate can be gradually lifted under the guide of the receiving guide combs even if the head is knocked, and the steel plate can not drill a trench through the first translation roller table at the outlet; after the guide comb is received between the swing roller way and the translation roller way, the roller way frame is permanently fixed on three degrees of freedom by adopting a welding mode, and after the swing roller way is fixed, 12 sets of hydraulic cylinders, magnetic rulers, valve tables and hydraulic servo systems can be abandoned and removed.
5. The head plate shearing method of a flying shear for slitting as claimed in claim 1, wherein the lower plane of the upper rotary drum tilts forward after the flying shear in the step 3) is put in a pre-swing position, a bell mouth passage with a large inlet and a small outlet is constructed, the pre-swing position is beneficial to passing of a warped steel plate, and the pre-swing position is carried out before the steel plate arrives, so that the shearing preparation time is not occupied.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210091357.XA CN114309075B (en) | 2022-01-26 | 2022-01-26 | Head plate shearing method of flying shears for slitting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210091357.XA CN114309075B (en) | 2022-01-26 | 2022-01-26 | Head plate shearing method of flying shears for slitting |
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| CN114309075A true CN114309075A (en) | 2022-04-12 |
| CN114309075B CN114309075B (en) | 2023-10-20 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203526688U (en) * | 2013-11-05 | 2014-04-09 | 中冶赛迪工程技术股份有限公司 | Guide and guard device of rotation drum type flying shears |
| CN204449468U (en) * | 2015-02-02 | 2015-07-08 | 山西太钢不锈钢股份有限公司 | A kind of device preventing strip running deviation from affecting flying shear shearing |
| CN109248919A (en) * | 2018-10-23 | 2019-01-22 | 辽宁科技大学 | A kind of Continuous Cold Rolled Strip dynamic shearing control method |
| CN109807179A (en) * | 2019-02-25 | 2019-05-28 | 河北普阳钢铁有限公司 | A kind of device and method for preventing flying shear cutting head cutting tail excessive |
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- 2022-01-26 CN CN202210091357.XA patent/CN114309075B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203526688U (en) * | 2013-11-05 | 2014-04-09 | 中冶赛迪工程技术股份有限公司 | Guide and guard device of rotation drum type flying shears |
| CN204449468U (en) * | 2015-02-02 | 2015-07-08 | 山西太钢不锈钢股份有限公司 | A kind of device preventing strip running deviation from affecting flying shear shearing |
| CN109248919A (en) * | 2018-10-23 | 2019-01-22 | 辽宁科技大学 | A kind of Continuous Cold Rolled Strip dynamic shearing control method |
| CN109807179A (en) * | 2019-02-25 | 2019-05-28 | 河北普阳钢铁有限公司 | A kind of device and method for preventing flying shear cutting head cutting tail excessive |
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| CN114309075B (en) | 2023-10-20 |
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