阅读说明：本技术 一种冷轧带钢卷曲溢出边自动控制装置及方法 (Automatic control device and method for cold-rolled strip steel curled overflowing edges ) 是由 许翔 汪红兵 张勇 于 2020-07-08 设计创作，主要内容包括：本发明公开了一种冷轧带钢卷曲溢出边自动控制装置及方法,属于冷轧生产技术领域。本发明的一种冷轧带钢卷曲溢出边自动控制装置及方法,包括卷取机构,所述卷取机构的卷曲区域内设置有溢出边自动控制机构,所述溢出边自动控制机构包括线性电机、挡块以及检测装置；所述卷曲机构包括卷取机,所述卷取机下方设置有EPC自动对边装置,从而将带钢卷曲时产生的偏离生产线中心线的数据传送至PLC控制器,所述PLC控制器进而将信号反馈至线性电机,通过线性电机控制挡块移动至工作位校正带钢位置,以保证带钢不偏离卷曲中心线,实现无溢出边卷曲,从而有效提高厚规格高强钢生产效率及带钢尾部的边部质量,降低生产成本。(The invention discloses a device and a method for automatically controlling the rolled overflowing edge of cold-rolled strip steel, belonging to the technical field of cold-rolling production. The invention relates to a device and a method for automatically controlling the rolled overflowing edge of cold-rolled strip steel, which comprises a coiling mechanism, wherein an automatic overflowing edge control mechanism is arranged in the coiling area of the coiling mechanism, and comprises a linear motor, a stop block and a detection device; the coiling mechanism comprises a coiling machine, an EPC automatic edge aligning device is arranged below the coiling machine, so that data which are generated when the strip steel is coiled and deviate from the central line of a production line are transmitted to a PLC controller, the PLC controller further feeds signals back to a linear motor, the stop dog is controlled by the linear motor to move to a working position to correct the position of the strip steel, the strip steel is guaranteed not to deviate from the coiled central line, no overflow edge coiling is realized, the production efficiency of the high-strength steel with thick specification and the quality of the edge part at the tail part of the strip steel are effectively improved, and the production cost is reduced.)

1. The automatic control device for the rolled overflowing edge of the cold-rolled steel strip is characterized in that: the automatic control device comprises a coiling mechanism (6), wherein an automatic overflow edge control mechanism (7) is arranged in a coiling area of the coiling mechanism (6), and the automatic overflow edge control mechanism (7) comprises a linear motor (71), a stop block (73) and a detection device; the linear motor (71) can drive the block (73) to slide along a linear guide rail (72) horizontally arranged below the block (73).

2. The automatic control device for the cold-rolled steel strip curling and overflowing edge as claimed in claim 1, wherein the automatic control device comprises: the coiling mechanism (6) comprises a steering roller (61), a press roller (62) is arranged above the steering roller (61), and a gap is reserved between the steering roller (61) and the press roller (62) and used for the strip steel to pass through; the turning roll (61) and the press roll (62) convey the strip steel between the turning roll and the press roll to a downstream coiling machine (63).

3. The automatic control device for the cold-rolled steel strip curling and edge-spilling of claim 2, wherein: an EPC automatic edge aligning device (65) is arranged below the crimping machine (63), the EPC automatic edge aligning device (65) can transmit data which are generated when strip steel is crimped on the device and deviate from a production line central line to a PLC (8), the PLC (8) feeds back received signals to a linear motor (71), and then the stop block (73) is controlled to move through the linear motor (71).

4. The automatic control device for the cold-rolled steel strip curling and overflowing edge as claimed in claim 3, wherein the automatic control device comprises: and a tail pressing roller (64) is arranged at the feed inlet of the crimping machine (63), and the outer roller surface of the tail pressing roller (64) can be in contact with the strip steel at the feed inlet of the crimping machine (63).

5. The automatic control device for the cold-rolled steel strip curling and overflowing edge as claimed in claim 4, wherein the automatic control device comprises: the linear motors (71) are mounted on the transmission side and the operation side of the front parts of the steering roller (61) and the compression roller (62), the linear motors (71) adopt linear guide rail structures, and the running speed of the linear motors is more than or equal to 1.5 m/s.

6. The automatic control device for the cold-rolled steel strip curling and overflowing edge of claim 5, wherein the automatic control device comprises: the upper stream of the coiling mechanism (6) is also provided with a shearing mechanism (4), the shearing mechanism (4) comprises front shearing pinch rolls (41), the front shearing pinch rolls (41) are symmetrically arranged above and below the strip steel and convey the strip steel to drum shears (42) at the downstream of the front shearing pinch rolls, and the drum shears (42) are symmetrically arranged above and below the strip steel; and a conveying belt (5) is horizontally arranged at the downstream of the rotary drum shear (42), and the downstream of the conveying belt (5) is connected to the coiling mechanism (6).

7. The automatic control device for the cold-rolled steel strip curling and overflowing edge of claim 6, wherein the automatic control device comprises: the upper stream of the shearing mechanism (4) is provided with a tensioning mechanism (3), the tensioning mechanism (3) comprises a tensioning roller I (31), strip steel is wound on the tensioning roller I (31), and the strip steel is tensioned by the tensioning roller I (31) and then sequentially passes through vertical tensioning rollers (32) which are vertically and symmetrically arranged; a horizontal tensioning roller guide roller (33) is transversely arranged behind the vertical tensioning roller (32), and a tensioning roller II (34) is arranged behind the horizontal tensioning roller guide roller (33).

8. The automatic control device for the cold-rolled steel strip curling and overflowing edge as claimed in claim 7, wherein the automatic control device comprises: the automatic online width measuring instrument (2) is arranged at the upstream of the tensioning mechanism (3), and the automatic online width measuring instrument (2) can automatically measure the width of the strip steel conveyed by the edge cutting shears (1) at the upstream and feed the value back to the PLC (8).

9. The automatic control method for the rolled overflowing edges of the cold-rolled strip steel is characterized by comprising the following steps of:

step one, bandwidth measurement: the actual width of the strip steel is measured to be a unit millimeter by an automatic on-line width gauge (2) at the part behind the welding seam of the steel coil; or measuring the width of the strip steel on the vertical tensioning roller (32) by adopting manual width measurement, inputting the measured value into an HMI (human machine interface) 9, and feeding back a signal to the PLC (programmable logic controller) by the HMI 9;

step two, splitting and shearing: the PLC (8) transmits a signal to the rotary drum shears (42), the rotary drum shears (42) shear the strip steel, the strip steel loses tension at the moment, the strip steel is curled through the curling machine (63), the EPC automatic edge aligning device (65) does not start, the steel coil moves under the action of the EPC automatic edge aligning device (65) on the curling machine (63) to generate data deviated from a production center line by b unit millimeters, b takes a positive value if deviating from an operation side, and takes a negative value if deviating from a transmission side;

step three, preventing the band steel from deviating: the maximum position of the original position of the stop block (73) deviated from the production center line is d unit millimeters, the position value of the stop block (73) to be moved is obtained by calculating three data of a, b and d, the PLC (8) is used for respectively controlling the transmission side and the linear motor (71) to move, the moving position of the operating side is C1, and C1 is d-a/2-b-10; the moving position of the transmission side is C2, and C2 is d-a/2+ b-10, so that the stopper (73) is driven to prevent the strip steel from shifting, and the moving position value of the stopper (73) is fed back to the PLC (8).

10. The method of claim 9, wherein the method comprises the following steps: in the third step, when a strip steel variety with the risk of edge overflow is produced, an automatic control mechanism (7) for edge overflow is started, when the strip steel in a curling region is 10 meters away from the position of a rotary drum shear (42), the displacement of a linear motor (71) is calculated through a PLC (programmable logic controller) (8), the displacement of an operating side is E1 unit millimeters, E1 is C1-f1, f1 is a corrected value of the operating side edge overflow, and the corrected value is modified through an HMI (human machine interface) (9); the displacement of the transmission side is E2 unit millimeters, E2 is C2-f2, and f2 is a corrected value of the overflow edge of the transmission side and is modified through an HMI (human machine interface) 9; the PLC (8) sends a moving command to the linear motor (71) to drive the stop block (73) to the working position and prevent the strip steel from deviating from the coiling central line, after the strip steel is coiled, the linear motor (71) drives the stop block (73) to return to the original position, and the control action is finished.

Technical Field

The invention relates to the technical field of cold rolling production, in particular to a device and a method for automatically controlling the rolled overflowing edge of cold-rolled strip steel.

Background

In steel production enterprises, in order to facilitate storage, transportation and packaging, cold-rolled hot-galvanized products adopt a coiling mode to coil strip steel into neat and compact steel coils. In the existing cold rolling post-processing production line, a finished product coil of a cold-rolled steel strip after annealing and coating treatment is curled to a product coil lower line through a curling machine, particularly, when thick (1.5mm < thickness < 2.5mm) and high-strength steel is produced, the steel strip is not tensioned after being subjected to partial coiling and shearing at an outlet region, because the steel coil after oil coating has certain slipping phenomenon, the plate type of the steel strip and other reasons and the influence of self gravity, a compression roller on a front steering roller of the coiling machine and a tail pressing roller of the curling machine cannot ensure that the steel strip does not deviate, the steel strip loses tension at the moment, an automatic edge-aligning device EPC (hydraulic drive type automatic edge-aligning device, EPC for short) does not act any more, the steel strip can generate irregular phenomenon on the coiling machine, the steel strip overflows in the curling process, the quality of the tail edge of the steel strip is poor, the lower line is difficult to package, and the heavy coil needs to be uncoiled, not only increases the production cost, but also reduces the yield of the unit.

According to the existing data and the process technology information retrieval of domestic well-known steel mills, the quality defects of the overflow edge of the cold-rolled product are divided into three types, namely plate-shaped overflow edge, weld seam overflow edge, and over-small or fluctuating coiling tension according to the generation reasons. The former two are mainly caused by poor plate shape quality of hot rolled incoming materials and two different specifications of products before and after a welding seam, and the latter are mainly caused by imperfect design of a strip steel tension control program during coiling. The adopted measures are that when the overflow edge is found to be serious, firstly, the speed is reduced manually, manual centering adjustment is adopted in time, the plate shape is controlled well strictly, and the part with the bad strip head shape is cut off, and the coiling tension is controlled strictly.

Through retrieval, related patents are disclosed at present for solving the defects of overflowing edges and the like of steel coils in the coiling process of cold-rolled strip steel. For example, the Chinese patent application number is: 201721575840.6, the date of authorized announcement is: 6.19.2018, a cold-rolled strip steel lower coiling overflow edge protection device is disclosed, which comprises a strip steel movable guide plate arranged obliquely and a guide plate swing oil cylinder arranged below the strip steel movable guide plate, wherein the upper end of the strip steel movable guide plate is hinged with a steering roller bearing seat through a rotating shaft, and the lower end of the movable guide plate is tangentially matched with a strip steel coil; the baffle swing hydro-cylinder tailpiece articulates at belted steel movable guide back, and the cylinder body end of baffle swing hydro-cylinder articulates on the hydro-cylinder fixing base, still including setting up the movable V-arrangement compression roller at belted steel movable guide lower extreme, the one end at the compression roller support is installed to the V-arrangement compression roller, the other end and the ground support of compression roller support are connected, the outer fringe butt extrusion fit of V-arrangement compression roller at operating condition and belted steel coil of strip. The existing method for controlling the overflow edge in the crimping machine area comprises the steps of controlling the overflow edge by manually adjusting the pressure on two sides of a compression roller in a shutdown state, or increasing the roughness of the compression roller and a steering roller, and adjusting the roller shape of the compression roller; or adjusting the levelness, the size and the roughness of a tail pressing roller of the coiling machine, controlling the oil coating amount and the roughness of the strip steel and the like. But after the strip steel of the cold rolling post-treatment line is curled, coiled and cut, the EPC automatic edge-aligning device does not act any more, and the edge-aligning of the strip steel is controlled by a press roller on a front steering roller of a coiling machine. The overflow edge has a plurality of reasons, the overflow direction is not regular, and the actual effect is not obvious.

Disclosure of Invention

1. Technical problem to be solved by the invention

Aiming at the problems that the quality defect reasons of the overflowing edges are numerous in the rolling process of the cold-rolled products in the prior art, the overflowing direction is not regular and the like, the invention provides an automatic control device and a method for the cold-rolled strip steel rolling overflowing edges, wherein a set of automatic control device for the strip steel overflowing edges is added in the area of a rolling machine, the device comprises a linear motor, a stop block and a detection device, the width of the strip steel is respectively detected by the detection device, and the movement displacement of a rolling machine in an automatic edge aligning device of the rolling machine is detected, so that the movement distance of the linear motor is automatically; the stop block is driven to the working position by the linear motor to correct the position of the strip steel, so that the strip steel is not deviated from a curling central line, no overflow edge curling is realized, the production efficiency of the high-strength steel with thick specification and the edge quality of the tail part of the strip steel are effectively improved, and the production cost is reduced.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the automatic control device for the rolled overflowing edges of the cold-rolled strip steel comprises a coiling mechanism, wherein an automatic control mechanism for the overflowing edges is arranged in a coiling area of the coiling mechanism, the automatic control mechanism for the overflowing edges comprises a linear motor, a stop block and a detection device, the width of the strip steel and the displacement of a coiling machine in an automatic edge aligning device of the coiling machine are respectively detected through the detection device, and therefore the moving distance of the linear motor is automatically calculated; the linear guide rail is connected with the linear motor through bolts, the linear motor can drive the stop block to slide along the linear guide rail horizontally arranged below the stop block, and the stop block is convenient to detach and replace; when a strip steel variety with the risk of overflowing edges is produced, the overflowing edge automatic control mechanism is selected to be used, the stop block is driven to the working position through the linear motor to correct the position of the strip steel, so that the strip steel is ensured not to deviate from a curling central line, the curling without overflowing edges is realized, the production efficiency of high-strength steel with thick specifications and the quality of the edge part of the tail part of the strip steel are effectively improved, and the production cost is reduced; and after the strip steel is curled, the linear motor drives the stop block to return to the original position, and the control action is finished.

According to a further technical scheme, the coiling mechanism comprises a steering roller, a compression roller is arranged above the steering roller, and a gap is reserved between the steering roller and the compression roller and used for the strip steel to pass through; the turning roll and the compression roll convey the strip steel between the turning roll and the compression roll to a downstream crimping machine, linear motors are mounted on the transmission side and the operation side of the front portions of the turning roll and the compression roll, the linear motors are of linear guide rail structures, and the running speed of the linear motors is more than or equal to 1.5 m/s; the stop block is arranged at a position which is away from the original position by 20 percent from the half of the maximum production width of the production central line position so as to be convenient for disassembly and maintenance, and the stop block has the advantages of no need of any conversion device, high transmission efficiency, no abrasion, high response speed and high control precision, and the positioning precision can reach 0.1 mm.

According to the further technical scheme, an EPC automatic edge aligning device is arranged below the crimping machine, the EPC automatic edge aligning device can transmit data which are generated when strip steel is crimped and deviate from the center line of a production line to a PLC controller, the PLC controller feeds back received signals to a linear motor, the stop block is controlled to move through the linear motor, and the PLC controller can realize data exchange calculation and control the device; the EPC automatic edge aligning device can ensure that the position of the edge of the strip steel is detected and the position of the coiling machine along the central line direction of the strip steel is adjusted in the process that the strip steel is curled and has tension, so that the automatic centering of the curling of the steel coil is realized.

According to the technical scheme, the tail pressing roller is arranged at the feed inlet of the crimping machine, and the outer roller surface of the tail pressing roller can be in contact with the strip steel at the feed inlet of the crimping machine, so that the strip steel conveyed to the crimping machine after being split and sheared can be attached to the feed inlet of the crimping machine and smoothly enter the crimping machine to be coiled.

According to a further technical scheme, a shearing mechanism is further arranged at the upstream of the coiling mechanism and comprises front shearing pinch rollers which are symmetrically arranged above and below the strip steel and convey the strip steel to drum shears at the downstream of the front shearing pinch rollers, and the drum shears are symmetrically arranged above and below the strip steel; and a conveying belt is horizontally arranged at the downstream of the rotary drum shears and can convey the conveyed strip steel to the downstream coiling mechanism.

According to the further technical scheme, a tensioning mechanism is arranged at the upstream of the shearing mechanism and comprises a tensioning roller I, strip steel is wound on the tensioning roller I, the strip steel is tensioned by the tensioning roller I and then sequentially passes through vertical tensioning rollers which are vertically and symmetrically arranged, the strip steel on the vertical tensioning rollers is manually measured and then enters a numerical value into an HMI human-machine interface, the HMI human-machine interface feeds a signal back to a PLC controller, the PLC controller feeds the received signal back to a linear motor, and the stop dog is controlled to move by the linear motor; and a horizontal tensioning roller guide roller is transversely arranged behind the vertical tensioning roller, and a tensioning roller II is arranged behind the horizontal tensioning roller guide roller, so that the conveying direction of the strip steel is changed, and the tension of the strip steel is maintained.

According to the further technical scheme, an automatic online width gauge is arranged at the upstream of the tensioning mechanism, the automatic online width gauge can automatically measure the width of the strip steel conveyed by the trimming shears at the upstream of the automatic online width gauge and feed the value of the width back to a PLC (programmable logic controller), and the PLC sends a signal to the rotary drum shears so as to realize the splitting and shearing of the strip steel; the automatic on-line width gauge is used for measuring the real width of the strip steel, is arranged behind the trimming shears of the production line, and adopts manual width measurement to input the actually measured strip steel width to the PLC system on the HMI human-computer interface.

An automatic control method for the rolled overflow edge of cold-rolled steel strip comprises the following steps:

step one, bandwidth measurement: measuring the actual width of the strip steel to be a unit millimeter by an automatic online width gauge at the part of the steel coil behind the welding seam; or measuring the width of the strip steel on the vertical tensioning roller by adopting manual width measurement, inputting the measured value into an HMI (human machine interface), and feeding back a signal to the PLC by the HMI;

step two, splitting and shearing: the PLC controller transmits a signal to the rotary drum shears, the rotary drum shears shear the strip steel, the strip steel loses tension at the moment, the strip steel is curled by the curling machine, the EPC automatic edge aligning device does not start, the steel coil moves on the curling machine under the action of the EPC automatic edge aligning device to generate data deviated from a production center line by b unit millimeters, and b takes a positive value if deviated from an operation side, and takes a negative value if deviated from a transmission side;

step three, preventing the band steel from deviating: the maximum position of the original position of the stop block deviating from the production center line is d unit millimeters, the position value of the stop block to be moved is obtained by calculating three data of a, b and d, the PLC is used for controlling the linear motor on the transmission side and the linear motor to be operated to move respectively, the moving position of the operation side is C1, and C1 is d-a/2-b-10; the moving position of the transmission side is C2, and C2 is d-a/2+ b-10, so that the stopper is driven, the deviation of the strip steel is prevented, and meanwhile, the moving position value of the stopper is fed back to the PLC.

In the third step, when a strip steel variety with the risk of edge overflow is produced, starting an automatic control mechanism for edge overflow, and when the strip steel in a curling area is 10 meters away from the position of a rotary drum shear, calculating the displacement of a linear motor through a PLC (programmable logic controller), wherein the displacement of an operating side is E1 unit millimeters, E1 is C1-f1, and f1 is a corrected value of the edge overflow of the operating side and can be modified on an HMI (human machine interface); the displacement of the transmission side is E2 unit millimeters, E2 is C2-f2, and f2 is a corrected value of the overflow edge of the transmission side and can be modified on an HMI (human machine interface); the PLC controller sends a moving command to the linear motor, so that the stop block is driven to a working position, the deviation of the strip steel from the coiling central line is prevented, after the strip steel is coiled, the linear motor drives the stop block to return to an original position, and the control action is finished; when steel grades without overflow risks are produced, the overflow edge automatic control mechanism is not selected, and the stop block is kept at the original position.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) according to the automatic control device and method for the rolled overflowing edges of the cold-rolled steel strip, the automatic control mechanism for the overflowing edges is arranged in the rolling area of the rolling mechanism, the automatic control mechanism for the overflowing edges detects the width of the steel strip and the displacement of the rolling machine in the automatic edge aligning device of the rolling machine through the detection device, and therefore the moving distance of the linear motor is automatically calculated; when a strip steel variety with the risk of overflowing edges is produced, the overflowing edge automatic control mechanism is selected to be used, the stop block is driven to the working position through the linear motor to correct the position of the strip steel, so that the strip steel is ensured not to deviate from a curling central line, the curling without overflowing edges is realized, the production efficiency of high-strength steel with thick specifications and the quality of the edge part of the tail part of the strip steel are effectively improved, and the production cost is reduced;

(2) according to the automatic control device and method for the rolled overflowing edges of the cold-rolled strip steel, linear motors are mounted on the transmission side and the operation side of the front parts of the steering roller and the compression roller, the linear motors are of linear guide rail structures, and the running speed of the linear motors is more than or equal to 1.5 m/s; the stop block is arranged at a position which is away from the original position by 20 percent plus a half of the maximum production width of the production central line position so as to be convenient for disassembly and maintenance, and the stop block has the advantages of no need of any conversion device, high transmission efficiency, no abrasion, high response speed and high control precision, and the positioning precision can reach 0.1 mm;

(3) according to the automatic control device and method for the rolled overflowing edges of the cold-rolled steel strip, the steel strip between the steering roller and the compression roller is transmitted to a downstream rolling machine, the EPC automatic edge aligning device is arranged below the rolling machine and can transmit data deviating from the central line of a production line generated when the steel strip is rolled to a PLC (programmable logic controller), and the EPC automatic edge aligning device can ensure that the steel strip is rolled in a tension process and adjust the position of a coiling machine along the central line of the steel strip by detecting the position of the edge of the steel strip, so that the automatic centering of the rolled steel strip is realized;

(4) according to the automatic control device and method for the rolled overflowing edges of the cold-rolled strip steel, the shearing mechanism is further arranged at the upstream of the coiling mechanism, after the rolled and split coils are cut, the EPC automatic edge-aligning device does not act any more, the strip steel loses tension, and the position of the stop block is accurately controlled through the linear motor, so that the strip steel is prevented from deviating from the actual rolled central line, and the overflowing edges of the strip steel are effectively controlled; the edge quality of the strip steel is ensured, the rewinding process is reduced, the production line rate is improved, and the production cost is reduced;

(5) the invention relates to an automatic control device and method for a coiled overflowing edge of a cold-rolled steel strip, wherein an automatic online width gauge is arranged at the upstream of a tensioning mechanism, the automatic online width gauge can automatically measure the width of the steel strip transmitted by an upstream trimming shear and feed the value back to a PLC (programmable logic controller), the automatic online width gauge is used for measuring the real width of the steel strip, and after the automatic online width gauge is arranged on the trimming shear of a production line, the actual measured width of the steel strip is input to a PLC system on an HMI (human machine interface) by adopting manual width measurement.

Drawings

FIG. 1 is a schematic view of the production line of the automatic control device of the present invention;

FIG. 2 is a schematic structural diagram of an automatic control mechanism for overflow edge in the present invention.

In the figure: 1-trimming shears; 2-automatic on-line width measuring instrument; 3-a tensioning mechanism; 4-a shearing mechanism; 5-a conveyor belt; 6-a crimping mechanism; 7-overflow edge automatic control mechanism; 8-a PLC controller; 9-HMI human machine interface; 31-tension roller I; 32-vertical take-up rolls; 33-horizontal take-up roll guide rolls; 34-tensioning roller II; 41-pinch roll before cutting; 42-drum shear; 61-a turning roll; 62-a press roll; 63-a coiling machine; 64-a tail roller; 65-EPC automatic edge aligning device; 71-a linear motor; 72-a linear guide; 73-stop.

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.