CN111570520A

CN111570520A - Full-electric roll changing system of cold rolling mill and roll changing method thereof

Info

Publication number: CN111570520A
Application number: CN202010434719.1A
Authority: CN
Inventors: 刘松; 计江; 徐利璞; 林军; 苏明; 尤磊
Original assignee: China National Heavy Machinery Research Institute Co Ltd
Current assignee: China National Heavy Machinery Research Institute Co Ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-08-25

Abstract

The invention provides a full-electric roll changing system of a cold rolling mill and a roll changing method thereof, and the full-electric roll changing system comprises a walking vehicle, a towing vehicle, a clamping device, a cross sliding vehicle and a pull rope emergency stop switch, wherein the walking vehicle, the towing vehicle, the clamping device and the cross sliding vehicle are all provided with independent driving sources, the driving sources are motors, the tail part of each motor is provided with an encoder, a plurality of position switches are distributed in a roll changing area of the cold rolling mill, and are respectively a position switch corresponding to the limit positions of the walking vehicle, the towing vehicle and the cross sliding vehicle, and a position switch arranged at the output end of the motor of the clamping device; all motors, all encoders, all position switches and pull rope emergency stop switches are connected with the PLC. The roll changing system utilizes the encoder and the position switch to clean and efficiently finish each action required by roll changing of the aluminum rolling mill, and utilizes the encoder and the position switch to orderly and accurately ensure the in-place and the cooperation of each roll changing action, thereby realizing full-automatic roll changing and thoroughly solving a plurality of problems of the traditional roll changing system in actual production.

Description

Full-electric roll changing system of cold rolling mill and roll changing method thereof

Technical Field

The invention belongs to the field of roll changing of aluminum rolling mills, and particularly relates to a full-electric roll changing system of a cold rolling mill and a roll changing method thereof.

Background

The aluminum product has increasingly prominent effect in national economy development, and the aluminum strip product has wide and deep application in various fields such as packaging, automobiles, military industry, microelectronics and the like. Due to the characteristic that the aluminum material is soft, the production process of the aluminum material is greatly different from that of the traditional ferrous metal, and particularly, the surface of the aluminum belt is extremely sensitive to oil stains.

At present, aluminum strips are produced by adopting an irreversible rolling process, even if trace oil stains are adhered to the surfaces of rollers, the surfaces of the rollers can be printed on the surfaces of the strips due to huge rolling pressure, the product value is greatly reduced, and even defective products are generated, and the process is inconvenient to monitor and feed back.

When the traditional aluminum strip rolling mill is in a rolling state, due to the protection effect of a smoke discharge anti-splash device and the like, the cleanliness of the surface of the roller basically meets the requirement; when the roller is changed, the cleanness of the roller surface can not be ensured due to various defects of the traditional roller changing mechanism.

The main problems of the conventional aluminum rolling mill roll changing system in use are the following two aspects:

(1) the roll surface and the surrounding environment are easily polluted

Traditional aluminium rolling mill roll change mechanism all adopts hydraulic system to drive, and hydraulic system all has the phenomenon such as running, falling, leaking and oozing in use, and the weeping can directly pollute the roll surface, and then leads to the fact the influence to the aluminium strip product, very easily leads to the fact the pollution to the workshop environment around the equipment moreover.

(2) Low automation degree

Because the power of the traditional roll changing mechanism of the aluminum rolling mill is provided by a hydraulic system, and the action detection and linkage of related hydraulic components can not be realized, the automation degree of the traditional roll changing mechanism is very low, the possibility of excessive manual intervention and roll surface pollution is caused, and the production efficiency of the whole unit is directly reduced due to the low automation degree of roll changing equipment.

Disclosure of Invention

The embodiment of the invention provides a full-electric roll changing system of a cold rolling mill and a roll changing method thereof, aiming at solving the problem that the surface of a roll is polluted by leakage caused by a hydraulic system adopted by a roll changing mechanism of the cold rolling mill; the second purpose is to solve the problem of low automation degree of the roller changing system of the rolling mill.

In order to solve the technical problem, the invention provides an all-electric roll changing system of a cold rolling mill, which comprises a travelling vehicle, wherein the travelling vehicle is provided with a towing vehicle, a cross sliding vehicle and a pull rope emergency stop switch, and the towing vehicle is connected with a clamping device, wherein the travelling vehicle, the towing vehicle, the clamping device and the cross sliding vehicle are respectively provided with an independent driving source, the driving sources are motors, the tail part of each motor is provided with an encoder, a plurality of position switches are distributed in a roll changing area of the cold rolling mill, and respectively comprise a position switch corresponding to the limit position of the travelling vehicle in the roll changing area, a position switch corresponding to the limit position of the towing vehicle in the roll changing area, a position switch corresponding to the limit position of the cross sliding vehicle in the roll changing area, and a position switch arranged at the output end of the motor of the clamping;

all motors, all encoders, all position switches and the pull rope emergency stop switch are electrically connected with a PLC for controlling the full-electric roll changing system to execute actions.

Furthermore, the clamping device comprises a base, a hollow shaft speed reducing motor with a built-in encoder is mounted on the base, a crank which can rotate synchronously with the hollow shaft is coaxially inserted in the hollow shaft of the hollow shaft speed reducing motor in a penetrating manner, two end parts of the crank extend out of the hollow shaft, and the two end parts are a handle end A and a handle end B respectively;

the end face of the handle end A is provided with an induction plate, the end part is also provided with an opening position detection switch and a clamping position detection switch which are both arranged on the base, the two detection switches are symmetrically arranged at 180 degrees relative to the end part, and the opening position detection switch and the clamping position detection switch are both position switches;

the end face of the handle end B is provided with an eccentric pin shaft which is hinged to the top end of the transmission connecting rod, the bottom end of the transmission connecting rod is hinged to the clamp, the middle of the clamp is hinged to the base, the buffer which is located right below the clamp is installed on the base, and the central axis of the transmission connecting rod is perpendicular to the central line axis of the hollow shaft.

Preferably, the transmission connecting rod at least comprises a left-handed thread connecting rod, a spiral sleeve and a right-handed thread connecting rod which are sequentially screwed from top to bottom;

the head of the left-handed thread connecting rod is a connecting rod hole, the connecting rod hole is hinged with an eccentric pin shaft of the handle end B, the middle of the left-handed thread connecting rod is connected with a left-handed nut in a screwing mode, the left-handed nut is abutted to the upper end face of the spiral sleeve, the lower end face of the spiral sleeve is abutted to a right-handed nut, the right-handed nut is sleeved in a penetrating mode and connected to the middle of the right-handed thread connecting rod in a screwing mode, the bottom end of the right-handed thread connecting rod is hinged with one end of the clamp.

Furthermore, the opening position detection switch is positioned right above the induction plate, and the clamping position detection switch is positioned right below the induction plate.

Preferably, the induction plate is L-shaped, the vertical section of the L shape is fixedly connected to the end face of the handle end A, the horizontal section of the L shape is suspended, and the included angle of the L shape deviates from the handle end A;

open position detection switch and press from both sides tight position detection switch and all install on the base through support detachably.

Furthermore, the hinged point of the middle part of the clamp and the base divides the clamp into two sections, which are respectively a driving end close to the right-handed threaded connecting rod and a suspended execution end, and the force arm of the driving end is 75% -85% of the force arm of the execution end.

Preferably, the eccentricity between the axis of the handle end B of the crank and the eccentric pin shaft is 12-15 mm, the output rotating speed of the hollow shaft speed reducing motor is 9-12 r/min, and the output power is 0.18-0.2 KW.

The invention also discloses a method for changing the roll by using the full-electric roll changing system, which comprises the following steps:

step one, initial state

The travelling car and the tractor are both positioned at the rear limit position, the position switch corresponding to the rear limit position is in a signaling state, the transverse moving car is positioned at the left limit position, the position switch corresponding to the left limit position is in a signaling state, a new roller system is installed in the left station of the transverse moving car, the right station of the transverse moving car is in an idle state, the right station of the transverse moving car is aligned with a window of the rolling mill to be beneficial to pulling out the old roller system, the clamping device is in a loosening state, and the pull rope emergency stop switch is in an unsetting state;

step two, roll changing state

The rolling mill stops and changes from the rolling state to the roll changing state, the PLC sends a walking command to the walking vehicle, the walking vehicle moves forward to be close to the rolling mill, when the walking vehicle reaches the front limit position and triggers the corresponding position switch, the position switch of the position sends a signal and causes the PLC to send a command to the tractor, the tractor moves forward to be close to the front limit position and triggers the corresponding position switch, the position switch of the position sends a signal and causes the PLC to send a command to the clamping device, the clamping device clamps the end of the old roll, the position switch of the clamping device sends a signal and causes the PLC to send a command to the tractor, the tractor moves backwards to be far away from the rolling mill, at the moment, due to the clamping action of the clamping device, the old roll is dragged into the full-electric roll changing system, when the tractor returns to the rear limit position again and triggers the corresponding position switch, the position switch of the position sends a signal and causes the, the clamping device loosens the end of the old roller, at the moment, the old roller system completely enters the full-electric roller changing system, at the moment, the position switch of the clamping device sends a signal and causes the PLC to issue an instruction to the cross sliding vehicle, the cross sliding vehicle moves to the right extreme position and triggers the corresponding position switch, the new roller system of the left station is aligned with the window of the rolling mill, at the moment, the position switch of the right extreme position of the cross sliding vehicle sends a signal and causes the PLC to issue an instruction to the clamping device, at the moment, the position switch of the clamping device sends a signal and causes the PLC to issue an instruction to the towing vehicle, the towing vehicle moves forward to be close to the rolling mill, at the moment, due to the clamping action of the clamping device, the new roller system is pushed into the rolling mill, when the towing vehicle reaches the front extreme position and triggers the position switch of the position, the position switch of the position sends a signal and causes the PLC to issue an, after the loosening action is finished, the position switch of the clamping device sends a signal and causes the PLC to issue an instruction to the tractor, the tractor moves backwards to be away from the rolling mill, when the tractor reaches the rear limit position and triggers the corresponding position switch, the position switch of the position sends a signal and causes the PLC to issue an instruction to the traveling car, the traveling car moves backwards to be away from the rolling mill, when the traveling car reaches the rear limit position and triggers the corresponding position switch, the position switch of the position sends a signal and causes the PLC to issue an instruction to the cross-sliding car, the cross-sliding car moves to the left limit position to trigger the corresponding position switch, at the moment, the old roller system is hoisted out, and one-time roller replacement is finished.

Furthermore, in the whole roll changing process, once the pull rope emergency stop switch is triggered, the whole roll changing system immediately stops all actions;

in each action of roll changing of the rolling mill, the PLC compares the real-time position fed back by each motor encoder with the limit position fed back by each position switch, if the real-time position and the limit position are consistent, the actions are sequentially executed and roll changing is completed, and if the real-time position and the limit position are not consistent, sudden stop is immediately carried out to avoid misoperation or danger.

The invention has the following beneficial effects:

the full-electric roll changing system utilizes the encoder and the position switch to cleanly and efficiently complete each action required by roll changing of the aluminum rolling mill, and utilizes the encoder and the position switch to orderly and accurately ensure the in-place and the cooperation of each roll changing action; the advantages of green and pollution-free electric system and convenient automation realization are fully exerted, not only is full-automatic roll change completely realized, but also a great deal of problems of the traditional roll change system in actual production are thoroughly solved.

In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic structural view of an all-electric roll changing system of a cold rolling mill.

Fig. 2 is a control schematic of an all-electric roll change system of a cold rolling mill.

Fig. 3 is a first structural schematic diagram of the clamping device.

Fig. 4 is a second structural schematic diagram of the clamping device.

Description of reference numerals:

1. a walking vehicle; 2. a tractor; 3. a clamping device; 4. a transverse moving vehicle; 5. a pull cord emergency stop switch;

301. a hollow shaft gear motor; 302. a crank; 303. a left-handed threaded connecting rod; 304. a left-handed nut; 305. a spiral sleeve; 306. right-hand turning of the nut; 307. a right-handed threaded connecting rod; 308. clamping; 309. a buffer; 3010. an open position detection switch; 3011. a clamping position detection switch; 3012. a base; 3013. a sensing plate.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

In the present invention, the upper, lower, left and right in the drawings are regarded as the upper, lower, left and right of the all-electric roll changing system of the cold rolling mill described in the present specification.

The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.

Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.

The first embodiment:

the first embodiment of the invention relates to a full-electric roll changing system of a cold rolling mill, referring to fig. 1, the full-electric roll changing system comprises a travelling vehicle 1, wherein a towing vehicle 2, a cross sliding vehicle 4 and a pull rope emergency stop switch 5 are installed on the travelling vehicle 1, the towing vehicle 2 is connected with a clamping device 3, the travelling vehicle 1, the towing vehicle 2, the clamping device 3 and the cross sliding vehicle 4 are respectively provided with an independent driving source, the driving sources are motors, an encoder is installed at the tail part of each motor, a plurality of position switches are distributed in a roll changing area of the cold rolling mill, and respectively are a position switch corresponding to the limit position of the travelling vehicle 1 in the roll changing area, a position switch corresponding to the limit position of the towing vehicle 2 in the roll changing area, a position switch corresponding to the limit position of the cross sliding vehicle 4 in the roll changing area, and a position switch installed at the output end;

all motors, all encoders, all position switches and the pull rope emergency stop switch 5 are electrically connected with a PLC for controlling the full-electric roll changing system to execute actions.

The traveling vehicle 1, the towing vehicle 2, the clamping device 3, the cross sliding vehicle 4 and the pull rope emergency stop switch 5 are all structures commonly used by commercially available rolling mill roll changing systems, and the difference is that the driving sources of the existing traveling vehicle 1, the towing vehicle 2, the clamping device 3 and the cross sliding vehicle 4 are all hydraulic systems, while the embodiment adopts motor driving, specifically, a motor is used as a power source through a gear, a rack and the like, the structure can be adjusted according to needs, it needs to be noted that the biggest improvement point of the embodiment is that an encoder is arranged at the tail part of the motor, the encoder detects the real-time position of the corresponding motor, a plurality of position switches are arranged in a roll changing area of the cold rolling mill, the position switches detect the limit positions of the corresponding structures, the PLC compares the real-time position fed back by each motor encoder with the limit positions fed back by each position switch, and if the two are consistent, the actions are sequentially executed and roll changing is completed, if not, the emergency stop is immediately carried out to avoid the occurrence of misoperation or danger.

The walking vehicle 1 is mainly used for driving the whole roll changing system to be close to or far away from a rolling mill, wheels connected with the walking vehicle 1 are driven by a speed reducing motor to rotate and enable the walking vehicle to move along corresponding tracks, and reciprocating linear motion of the walking vehicle is realized through positive and negative rotation of the motor; the tractor 2 is mainly used for pushing a roller system into a rolling mill or dragging the roller system into a roller changing system, the structure principle and the motion direction of the tractor 2 are similar to those of the walking vehicle 1, and the difference is that the motion track of the walking vehicle 1 is connected with a civil engineering foundation, and the motion track of the tractor 2 is connected with the walking vehicle 1; the clamping device 3 is connected with the tractor 2, the connecting rod mechanism connected with the clamping device 3 is driven by the speed reducing motor to swing, and the clamping or loosening of the roller end of the roller can be realized through the forward and reverse rotation of the motor; the transverse moving vehicle 4 is mainly used for changing the stations of the new and old rollers, the transverse moving vehicle 4 is connected with the walking vehicle 1, the gear connected with the transverse moving vehicle is driven by the speed reducing motor to transmit power to the rack meshed with the gear, and the reciprocating linear motion of the transverse moving vehicle can be realized by the forward and reverse rotation of the motor; the pull rope emergency stop switch 5 has the main function that emergency stop of the whole roll changing system can be achieved in the largest range before danger occurs, the pull rope emergency stop switch 5 is connected with the walking vehicle 1 and symmetrically arranged on two sides of the roll changing system, and once the pull rope emergency stop switch 5 is triggered, the whole roll changing system can immediately stop all actions and effectively prevent danger from occurring.

The encoder selects a high pulse number encoder, and the encoder is matched with a position switch to realize monitoring of corresponding actions and positions, and the sequence and priority level of each related action are interlocked to further realize full-automatic roll change; the high pulse number encoder is positioned at the tail part of the speed reducing motor and is used for detecting the real-time positions of all subsystems (the walking vehicle 1, the tractor 2, the clamping device 3, the cross sliding vehicle 4 and the pull rope emergency stop switch 5), and the position switch is mainly used for detecting the limit position of each subsystem so as to prevent misoperation and protect the system.

Along with the operation of the motor, when the position switch sends a signal, if the feedback position of the encoder at the tail part of the motor is consistent with the feedback position of the position switch, the signal of the position switch is fed back to the PLC to realize the accurate stop of the action and trigger the corresponding speed reducing motor of the next action to start the auxiliary action of the next roll changing, and the full-automatic roll changing can be realized by controlling the sequential logic relationship between the position switch and each speed reducing motor; on the contrary, if the feedback position of the encoder is inconsistent with the actual position detected by the position switch, the PLC can issue an instruction and stop all the speed reducing motors to realize rapid parking. Therefore, all actions required by roll changing of the aluminum rolling mill can be completed safely and reliably.

Once the pull rope emergency stop switch 5 is triggered in the production operation, the roller changing system stops the original action in progress and sends instructions to all the speed reducing motors due to the highest priority of the signal, and danger is prevented at the first time through the instant rotation stop.

Specifically, the operating principle of the all-electric roll changing system of the cold rolling mill is as follows, as shown in fig. 2:

initial state: the travelling car 1 and the tractor 2 are both at rear limit positions, the position switch corresponding to the rear limit position is in a signaling state, the transverse moving car 4 is at a left limit position, the position switch corresponding to the left limit position is in a signaling state, a new roller system is installed in a left station of the transverse moving car 4, a right station is in an idle state, the right station of the transverse moving car 4 is aligned with a window of a rolling mill to be beneficial to pulling out the old roller system, the clamping device 3 is in a loosening state, and the pull rope emergency stop switch 5 is in an unsetting state;

the roll changing state: the rolling mill stops and changes from the rolling state to the roll changing state, the PLC sends a walking command to the walking vehicle 1, the walking vehicle 1 moves forward to be close to the rolling mill, when the walking vehicle 1 reaches the front limit position and triggers the corresponding position switch, the position switch of the position sends a signal and causes the PLC to send a command to the tractor 2, the tractor 2 moves forward to be close to the front limit position and triggers the corresponding position switch, the position switch of the position sends a signal and causes the PLC to send a command to the clamping device 3, the clamping device 3 clamps the end of the old roll, at the moment, the position switch of the clamping device 3 sends a signal and causes the PLC to send a command to the tractor 2, the tractor 2 moves backward to be far away from the rolling mill, at the moment, due to the clamping action of the clamping device 3, the old roll is dragged into the full-electric roll changing system, when the tractor 2 returns to the rear limit position again and triggers the corresponding position switch, the position switch of the position sends, the clamping device 3 loosens the end of the old roller, at this time, the old roller system completely enters the full-electric roller changing system, at this time, the position switch of the clamping device 3 sends a signal and causes the PLC to issue an instruction to the traverse carriage 4, the traverse carriage 4 moves to the right extreme position and triggers the corresponding position switch, the new roller system of the left station is aligned with the window of the rolling mill, at this time, the position switch of the right extreme position of the traverse carriage 4 sends a signal and causes the PLC to issue an instruction to the clamping device 3, the clamping device 3 clamps the new roller end of the left station, at this time, the position switch of the clamping device 3 sends a signal and causes the PLC to issue an instruction to the towing vehicle 2, the towing vehicle 2 moves forward to be close to the rolling mill, at this time, due to the clamping action of the clamping device 3, the new roller system is pushed into the rolling mill, when the towing vehicle 2 reaches the front extreme position and triggers the position switch of the position switch, the clamping device 3 loosens the new roller end, after the loosening action is finished, the position switch of the clamping device 3 sends a signal and causes the PLC to issue an instruction to the tractor 2, the tractor 2 moves backwards to be far away from the rolling mill, when the tractor 2 reaches the rear limit position and triggers the corresponding position switch, the position switch at the position sends a signal and causes the PLC to issue an instruction to the travelling car 1, the travelling car 1 moves backwards to be away from the rolling mill, when the travelling car 1 reaches the rear limit position and triggers the corresponding position switch, the position switch at the position sends a signal to cause the PLC to issue an instruction to the transverse moving vehicle 4, the transverse moving vehicle 4 moves to the left limit position to trigger the corresponding position switch, at the moment, the old roller system is lifted out to complete one-time roller change, the new roll system for next use can be hoisted into the left station of the cross sliding vehicle 4, and the full-electric roll changing system enters the initial state again and is ready for the next roll change.

The roll changing system of the embodiment adopts a full electric system to complete roll changing actions and detect and interlock corresponding roll changing actions, so that the roll changing system thoroughly avoids leakage of running, falling, dripping and seepage of a hydraulic system and pollution to a roll surface and the surrounding environment, the roll changing system is green and efficient, the product quality is obviously improved, the automation level is effectively improved, and full-automatic roll changing is further realized.

Second embodiment:

the embodiment relates to a full-electric roll changing system of a cold rolling mill, and the full-electric roll changing system is shown in figure 1 and comprises a traveling vehicle 1, wherein a towing vehicle 2, a cross sliding vehicle 4 and a pull rope emergency stop switch 5 are installed on the traveling vehicle 1, and the towing vehicle 2 is connected with a clamping device 3, wherein the traveling vehicle 1, the towing vehicle 2, the clamping device 3 and the cross sliding vehicle 4 are respectively provided with an independent driving source which is a motor, an encoder is installed at the tail part of each motor, a plurality of position switches are distributed in a roll changing area of the cold rolling mill, and respectively are a position switch corresponding to the limit position of the traveling vehicle 1 in the roll changing area, a position switch corresponding to the limit position of the towing vehicle 2 in the roll changing area, a position switch corresponding to the limit position of the cross sliding vehicle 4 in the roll changing area, and a position switch installed at the output;

Referring to fig. 3, the clamping device 3 includes a base 3012, a hollow shaft speed-reducing motor 301 with a built-in encoder is mounted on the base 3012, a crank 302 which is coaxially inserted into the hollow shaft of the hollow shaft speed-reducing motor 301 and can rotate synchronously with the hollow shaft, two ends of the crank 302 extend out of the hollow shaft, and the two ends are respectively a handle end a and a handle end B, as shown in fig. 3 and 4;

an end face of the handle end a is provided with an induction plate 3013, and the end is further provided with an open position detection switch 3010 and a clamping position detection switch 3011 both mounted on a base 3012, the two detection switches are symmetrically arranged at 180 ° with respect to the end, and the two detection switches are position switches.

The end face of the handle end B is provided with an eccentric pin shaft which is hinged to the top end of the transmission connecting rod, the bottom end of the transmission connecting rod is hinged to the clamp 308, the middle of the clamp 308 is hinged to the base 3012, the buffer 309 which is located right below the clamp 308 is installed on the base 3012, and the central axis of the transmission connecting rod is perpendicular to the central line axis of the hollow shaft.

The working principle and working process of the clamping device 3 are as follows:

mounting the clamping device 3 on the walking vehicle 1, ensuring that the clamping device 3 is in an initial state: the clamp 308 is opened, the induction plate 3013 is right opposite to the open position detection switch 3010, and the buffer 309 extends out;

the walking vehicle 1 drives the clamping device 3 to move to a roller, the buffer 309 abuts against the end face of the roller, the hollow shaft speed reduction motor 301 drives the crank 302 to rotate, the induction plate 3013 rotates to the clamping position detection switch 3011 clockwise or anticlockwise from the open position detection switch 3010 by taking the center of the end face of the handle end A as the circle center, the induction plate 3013 triggers the clamping position detection switch 3011, the crank 302 drives the clamp 308 to act through the transmission connecting rod until the execution end of the clamp 308 falls down, and the clamp 308 and the buffer 309 clamp the roller end;

when the roll end needs to be loosened, the hollow shaft speed reducing motor 301 drives the crank 302 to rotate, the induction plate 3013 rotates from the clamping position detection switch 3011 to the opening position detection switch 3010 anticlockwise or clockwise by taking the end face center of the handle end a as the center of a circle, the induction plate 3013 triggers the opening position detection switch 3010, the crank 302 drives the clamp 308 to act through the transmission connecting rod until the execution end of the clamp 308 is lifted, and the clamp 308 is opened and separated from the roll end.

The rotation angle of the hollow shaft speed reduction motor 301 is 0 to 180 degrees, and the induction plate 3013 and the hollow shaft speed reduction motor 301 rotate synchronously, so the rotation angle of the hollow shaft speed reduction motor 301 can be explained by taking the induction plate 3013 as a reference, if the induction plate 3013 rotates clockwise from the open position detection switch 3010 to the clamping position detection switch 3011, the roll end is clamped at the moment, and if the roll end needs to be loosened, the induction plate 3013 rotates anticlockwise from the clamping position detection switch 3011 to the open position detection switch 3010; alternatively, the sensing plate 3013 is turned counterclockwise from the open position detection switch 3010 to the pinch position detection switch 3011, the roll end is pinched at this time, and if the roll end is to be loosened, the sensing plate 3013 is turned clockwise from the pinch position detection switch 3011 to the open position detection switch 3010.

The crank 302, the transmission connecting rod, the clamp 308 and the buffer 309 form an actuating mechanism of the fully electric clamping device 3, the encoder is installed in the hollow shaft speed reducing motor 301 and connected with the rotor for indirectly detecting the real-time position of the actuating mechanism, and the two detection switches are used for directly detecting the limit position of the actuating mechanism to prevent misoperation, so that the fully electric clamping device 3 is protected.

Specifically, when the sensing board 3013 triggers the open position detection switch 3010 or the clamping position detection switch 3011, the open position detection switch 3010 or the clamping position detection switch 3011 sends a signal to the PLC of the roll changing system, and at the same time, the encoder in the hollow shaft speed reduction motor 301 sends a signal to the PLC, the PLC compares the feedback position of the encoder with the actual position of the detection switch, if the feedback position of the encoder is consistent with the actual position of the detection switch, the clamping action or the opening action is continued, and if the feedback position is inconsistent with the actual position of the detection switch, the PLC controls the hollow shaft speed reduction motor 301 to.

It should be noted that the hollow shaft speed reduction motor 301 is a dual output shaft, i.e. one shaft has two output ends, and the shaft is a hollow shaft, so that the crank 302 can be inserted into the hollow shaft through the hollow shaft and can rotate coaxially with the hollow shaft.

The open position detection switch 3010 and the clamp position detection switch 3011 are position switches available on the market, and the specific model can be selected by oneself; the encoder can be a commercially available high pulse number encoder, and specifically can be selected according to the needs.

In the embodiment, the two detection switches and the encoder are matched for use, so that the clamping and opening actions are orderly and accurately ensured to be in place, the advantages of greenness, no pollution and convenience in automation realization of an electric system are fully exerted, and a plurality of problems of the traditional clamping device 3 in actual production are thoroughly solved.

The third embodiment:

the embodiment relates to a full-electric roll changing system of a cold rolling mill, and the full-electric roll changing system is shown in fig. 3 and comprises a traveling vehicle 1, wherein a towing vehicle 2, a cross sliding vehicle 4 and a pull rope emergency stop switch 5 are installed on the traveling vehicle 1, and the towing vehicle 2 is connected with a clamping device 3, wherein the traveling vehicle 1, the towing vehicle 2, the clamping device 3 and the cross sliding vehicle 4 are respectively provided with an independent driving source which is a motor, an encoder is installed at the tail part of each motor, a plurality of position switches are distributed in a roll changing area of the cold rolling mill, and respectively are a position switch corresponding to the limit position of the traveling vehicle 1 in the roll changing area, a position switch corresponding to the limit position of the towing vehicle 2 in the roll changing area, a position switch corresponding to the limit position of the cross sliding vehicle 4 in the roll changing area, and a position switch installed at the;

Referring to fig. 3, the clamping device 3 includes a base 3012, a hollow shaft speed reduction motor 301 with a built-in encoder is mounted on the base 3012, a crank 302 which is coaxially inserted into the hollow shaft of the hollow shaft speed reduction motor 301 and can rotate synchronously with the hollow shaft, two ends of the crank 302 extend out of the hollow shaft, and the two ends are respectively a handle end a and a handle end B;

an induction plate 3013 is installed on the end face of the handle end a, an open position detection switch 3010 and a clamping position detection switch 3011 both installed on a base 3012 are also installed on the end portion, and the two detection switches are symmetrically arranged at 180 degrees with respect to the end portion;

Referring to fig. 3, the transmission link includes at least a left-handed threaded link 303, a helical casing 305 and a right-handed threaded link 307 which are sequentially screwed from top to bottom;

the head of the left-hand threaded connecting rod 303 is a connecting rod hole which is hinged with an eccentric pin shaft of the handle end B, the middle part of the left-hand threaded connecting rod 303 is screwed with a left-hand nut 304, the left-hand nut 304 is abutted against the upper end surface of a screw sleeve 305, the lower end surface of the screw sleeve 305 is abutted against a right-hand nut 306, the right-hand nut 306 is sleeved and screwed in the middle part of a right-hand threaded connecting rod 307 in a penetrating way, the bottom end of the right-hand threaded connecting rod 307 is hinged with one end part of a clamp 308, and the other end part of the clamp 308 is.

Specifically, the hollow shaft decelerating motor 301 is connected to the base 3012, the hollow shaft decelerating motor 301 is a hollow shaft structure, the crank 302 is inserted into the hollow shaft decelerating motor 301 and rotates with the rotation of the hollow shaft decelerating motor 301, when the crank 302 rotates to a proper position, one end of the crank 302 triggers the open position detecting switch 3010 or the clamping position detecting switch 3011 and sends a signal, the open position detecting switch 3010 and the clamping position detecting switch 3011 are connected to the base 3012, the other end of the crank 302 is hinged to one end of the left-handed threaded connecting rod 303, the left-handed nut 304 is screwed in the middle of the left-handed threaded connecting rod 303, the other end of the left-handed threaded connecting rod 303 is screwed into the left-handed threaded hole in one end of the thread bushing 305, the right-handed threaded connecting rod 307 is screwed in the right-handed threaded hole in the other end of the thread bushing 305, the right-handed nut 306 is screwed in the middle of the right-handed, the middle portion of the clamp 308 is hinged to the base 3012, and the bumper 309 is connected to the base 3012.

The full-electric clamping device 3 is connected with a traction system in the roll changing system and moves together with the traction system, and the initial state is as follows: the clamp 308 opens and the crank 302 triggers and signals the open position detection switch 3010 and the bumper 309 is fully extended.

When the all-electric clamping device 3 moves with the traction system and reaches the respective limit position, the buffer 309 comes into contact with the roll end face and generates a certain amount of compression to buffer the roll change system. The PLC of the roll changing system gives an instruction to the hollow shaft speed reducing motor 301, the hollow shaft speed reducing motor 301 drives the crank 302 to rotate anticlockwise, the crank 302 drives the driving end of the clamp 308 to be lifted through the transmission action of the left-handed threaded connecting rod 303, the left-handed nut 304, the threaded sleeve 305, the right-handed nut 306 and the right-handed threaded connecting rod 307, meanwhile, the execution end of the clamp 308 falls at the extreme speed, when the hollow shaft speed reducing motor 301 rotates 180 degrees, the crank 302 triggers the clamping position detection switch 3011 and sends a signal, and the clamp 308 finishes the extreme speed clamping of the roll end of the roll.

The movement of the full electric clamp 3 for opening at the maximum speed is as follows:

the PLC of the roll changing system gives an instruction to the hollow shaft speed reducing motor 301, the hollow shaft speed reducing motor 301 drives the crank 302 to rotate clockwise, the crank 302 drives the driving end of the clamp 308 to swing down anticlockwise through the transmission action of the left-handed threaded connecting rod 303, the left-handed nut 304, the threaded sleeve 305, the right-handed nut 306 and the right-handed threaded connecting rod 307, meanwhile, the reverse clock needle at the highest speed of the execution end of the clamp 308 swings up, when the hollow shaft speed reducing motor 301 rotates 180 degrees, the crank 302 triggers the opening position detection switch 3010 and sends a signal, the clamp 308 finishes the highest speed opening of the roll end, and at the moment, the clamping device 3 retreats along with the traction system and returns to the initial state again to prepare for the next clamping action.

The left-handed nut 304 and the right-handed nut 306 are used for fixing the corresponding connecting rod after the hinge point distance is adjusted so as to transmit power more stably, and specifically comprise the following steps: loosening the left-handed nut 304/right-handed nut 306 and rotating the threaded sleeve 305 counterclockwise can lengthen the hinge point distance between the crank 302 and the clamp 308 to accommodate the grip of the large diameter roll end, and conversely, shorten the distance to accommodate the grip of the small diameter roll end.

Fourth embodiment:

unlike the third embodiment, in the present embodiment, for convenience of mounting, as shown in fig. 4, the open position detection switch 3010 is located directly above the sensor board 3013, and the clamp position detection switch 3011 is located directly below the sensor board 3013.

Referring to fig. 4, the sensing board 3013 is L-shaped, the vertical section of the L-shape is fixed to the end face of the handle end a, the horizontal section of the L-shape is suspended, and the included angle of the L-shape deviates from the handle end a, at the initial position, the horizontal section of the sensing board 3013 is facing the open position detection switch 3010, which is intended to trigger the open position detection switch 3010 to open the clamp 308, and similarly, when the horizontal section of the sensing board 3013 is facing the clamp position detection switch 3011, it triggers the clamp position detection switch 3011 to clamp the clamp 308.

It should be noted that the sensing board 3013 is used to trigger the detection switch, that is, the detection switch can be triggered when being shielded, so the sensing board 3013 is not an electronic device, and only serves to trigger the detection switch.

In order to facilitate the disassembly and the maintenance, the open position detection switch 3010 and the clamping position detection switch 3011 are detachably mounted on the base 3012 through a bracket.

The hinged point between the middle of the clamp 308 and the base 3012 divides the clamp 308 into two sections, which are respectively the driving end near the right-handed threaded connecting rod 307 and the suspended actuating end, and the force arm of the driving end is 75% -85% of the force arm of the actuating end.

For the roll ends of the rolls with different diameters, after the left-handed nut 304 and the right-handed nut 306 are loosened, the distance of a hinge point between the crank 302 and the driving end of the clamp 308 can be increased by rotating the spiral sleeve 305 anticlockwise to adapt to clamping of the roll end with the large diameter, otherwise, the distance is shortened to adapt to clamping of the roll end with the small diameter, the adjustment range of the spiral sleeve 305 to the distance of the hinge point is about-50 mm, and the roll end of the roll can be clamped at the highest speed or opened at the highest speed through a distance amplification effect.

It can be seen that the opening of this embodiment means that the actuating end of the clamp 308 is raised, the actuating end and the buffer 309 forming a space in which the roll end can be accommodated; the clamping in this embodiment means that the actuator end of the clamp 308 falls and the actuator end and the buffer 309 clamp the roll end.

Preferably, the eccentricity between the axis of the handle end B of the crank 302 and the eccentric pin shaft is 12mm to 15 mm.

The output rotating speed of the hollow shaft speed reducing motor 301 is 9 r/min-12 r/min, the output power is 0.18 KW-0.2 KW, and a low-power speed reducing motor with low rotating speed and high speed ratio is preferred.

Fifth embodiment:

the embodiment protects a method for changing rolls by using a full-electric roll changing system, which comprises the following steps:

step one, initial state

The travelling car 1 and the tractor 2 are both at rear limit positions, the position switch corresponding to the rear limit position is in a signaling state, the transverse moving car 4 is at a left limit position, the position switch corresponding to the left limit position is in a signaling state, a new roller system is installed in a left station of the transverse moving car 4, a right station is in an idle state, the right station of the transverse moving car 4 is aligned with a window of a rolling mill to be beneficial to pulling out the old roller system, the clamping device 3 is in a loosening state, and the pull rope emergency stop switch 5 is in an unsetting state;

step two, roll changing state

The rolling mill stops and changes from the rolling state to the roll changing state, the PLC sends a walking command to the walking vehicle 1, the walking vehicle 1 moves forward to be close to the rolling mill, when the walking vehicle 1 reaches the front limit position and triggers the corresponding position switch, the position switch of the position sends a signal and causes the PLC to send a command to the tractor 2, the tractor 2 moves forward to be close to the front limit position and triggers the corresponding position switch, the position switch of the position sends a signal and causes the PLC to send a command to the clamping device 3, the clamping device 3 clamps the end of the old roll, at the moment, the position switch of the clamping device 3 sends a signal and causes the PLC to send a command to the tractor 2, the tractor 2 moves backward to be far away from the rolling mill, at the moment, due to the clamping action of the clamping device 3, the old roll is dragged into the full-electric roll changing system, when the tractor 2 returns to the rear limit position again and triggers the corresponding position switch, the position switch of the position sends, the clamping device 3 loosens the end of the old roller, at this time, the old roller system completely enters the full-electric roller changing system, at this time, the position switch of the clamping device 3 sends a signal and causes the PLC to issue an instruction to the traverse carriage 4, the traverse carriage 4 moves to the right extreme position and triggers the corresponding position switch, the new roller system of the left station is aligned with the window of the rolling mill, at this time, the position switch of the right extreme position of the traverse carriage 4 sends a signal and causes the PLC to issue an instruction to the clamping device 3, the clamping device 3 clamps the new roller end of the left station, at this time, the position switch of the clamping device 3 sends a signal and causes the PLC to issue an instruction to the towing vehicle 2, the towing vehicle 2 moves forward to be close to the rolling mill, at this time, due to the clamping action of the clamping device 3, the new roller system is pushed into the rolling mill, when the towing vehicle 2 reaches the front extreme position and triggers the position switch of the position switch, clamping device 3 unclamps new roll roller end, unclamp after the action accomplish clamping device 3's position switch send out news and cause PLC to assign the instruction and give tractor 2, tractor 2 moves backward and keeps away from the rolling mill, when tractor 2 reachs back extreme position and triggers corresponding position switch, the position switch of this position sends out news and causes PLC to assign the instruction and give carriage 1, carriage 1 moves backward and keeps away from the rolling mill, when carriage 1 reachs back extreme position and triggers corresponding position switch, the position switch of this position sends out news and causes PLC to assign the instruction and give sideslip car 4, sideslip car 4 moves to left extreme position and triggers corresponding position switch, hang out old roll system this moment, accomplish roll change once.

Sixth embodiment:

different from the fifth embodiment, in the whole roll changing process, once the pull rope emergency stop switch 5 is triggered, the whole roll changing system immediately stops all actions;

in each action of roll changing of the rolling mill, referring to fig. 2, the PLC compares the real-time position fed back by each motor encoder with the limit position fed back by each position switch, if the two are consistent, the actions are sequentially executed and roll changing is completed, and if the two are not consistent, emergency stop is immediately performed to avoid misoperation or danger.

The full-electric roll changing system utilizes the encoder and the position switch to complete all actions required by roll changing of the aluminum rolling mill cleanly and efficiently, and orderly and accurately ensures the in-place and the cooperation of all the roll changing actions.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims

1. The utility model provides a full-electric roll change system of cold rolling mill, includes walking car (1), install tractor (2), sideslip car (4) and stay cord scram switch (5) on walking car (1), tractor (2) are connected with clamping device (3), and wherein, walking car (1), tractor (2), clamping device (3) and sideslip car (4) all have independent driving source, its characterized in that: the driving source is a motor, an encoder is arranged at the tail part of each motor, a plurality of position switches are arranged in a roll changing area of the cold rolling mill, and the position switches are respectively a position switch corresponding to the limit position of the walking vehicle (1) in the roll changing area, a position switch corresponding to the limit position of the towing vehicle (2) in the roll changing area, a position switch corresponding to the limit position of the cross sliding vehicle (4) in the roll changing area, and a position switch arranged at the output end of the motor of the clamping device (3);

all motors, all encoders, all position switches and the pull rope emergency stop switch (5) are electrically connected with a PLC for controlling the full-electric roll changing system to execute actions.

2. An all-electric roll change system for a cold-rolling mill according to claim 1, characterized in that: the clamping device (3) comprises a base (3012), a hollow shaft speed reducing motor (301) with a built-in encoder is mounted on the base (3012), a crank (302) which can rotate synchronously with the hollow shaft is coaxially inserted into the hollow shaft of the hollow shaft speed reducing motor (301) in a penetrating mode, two end portions of the crank (302) extend out of the hollow shaft, and the two end portions are a handle end A and a handle end B respectively;

an induction plate (3013) is installed on the end face of the handle end A, an open position detection switch (3010) and a clamping position detection switch (3011) which are installed on a base (3012) are further arranged on the end portion, the two detection switches are symmetrically arranged at 180 degrees relative to the end portion, and the open position detection switch (3010) and the clamping position detection switch (3011) are position switches;

the end face of the handle end B is provided with an eccentric pin shaft, the eccentric pin shaft is hinged to the top end of the transmission connecting rod, the bottom end of the transmission connecting rod is hinged to the clamp (308), the middle of the clamp (308) is hinged to the base (3012), the buffer (309) located right below the clamp (308) is installed on the base (3012), and the central axis of the transmission connecting rod is perpendicular to the central line axis of the hollow shaft.

3. An all-electric roll change system for a cold-rolling mill according to claim 2, characterized in that: the transmission connecting rod at least comprises a left-handed thread connecting rod (303), a spiral sleeve (305) and a right-handed thread connecting rod (307) which are connected in a screwing way from top to bottom in sequence;

the head of the left-handed threaded connecting rod (303) is a connecting rod hole, the connecting rod hole is hinged with an eccentric pin shaft of the handle end B, the middle of the left-handed threaded connecting rod (303) is screwed with a left-handed nut (304), the left-handed nut (304) is abutted to the upper end face of a spiral sleeve (305), the lower end face of the spiral sleeve (305) is abutted to a right-handed nut (306), the right-handed nut (306) is screwed in the middle of the right-handed threaded connecting rod (307) in a penetrating and sleeving manner, the bottom end of the right-handed threaded connecting rod (307) is hinged with one end of a clamp (308), and the other end of the clamp (308) is suspended and.

4. An all-electric roll change system for a cold-rolling mill according to claim 2, characterized in that: the opening position detection switch (3010) is located right above the induction plate (3013), and the clamping position detection switch (3011) is located right below the induction plate (3013).

5. An all-electric roll change system for a cold-rolling mill according to claim 2, characterized in that: the induction plate (3013) is L-shaped, the vertical section of the L-shape is fixedly connected to the end face of the handle end A, the horizontal section of the L-shape is suspended, and the included angle of the L-shape deviates from the handle end A;

the opening position detection switch (3010) and the clamping position detection switch (3011) are both detachably mounted on the base (3012) through a bracket.

6. An all-electric roll change system for a cold-rolling mill according to claim 2, characterized in that: the clamp (308) is divided into two sections by a hinged point between the middle part of the clamp (308) and the base (3012), the two sections are respectively a driving end close to the right-handed threaded connecting rod (307) and a suspended execution end, and the force arm of the driving end is 75% -85% of that of the execution end.

7. An all-electric roll change system for a cold-rolling mill according to claim 2, characterized in that: the eccentricity between the axis of the handle end B of the crank (302) and the eccentric pin shaft is 12-15 mm, the output rotating speed of the hollow shaft speed reducing motor (301) is 9-12 r/min, and the output power is 0.18-0.2 KW.

8. A method for roll changing by using an all-electric roll changing system according to any one of claims 1 to 7, characterized by comprising the following steps:

step one, initial state

The walking vehicle (1) and the tractor (2) are both at rear limit positions, the position switch corresponding to the rear limit position is in a signaling state, the transverse moving vehicle (4) is at a left limit position, the position switch corresponding to the left limit position is in a signaling state, a new roller system is installed in a left station of the transverse moving vehicle (4), a right station is in an idle state, the right station of the transverse moving vehicle (4) is aligned with a window of a rolling mill to facilitate pulling out of an old roller system, the clamping device (3) is in a loosening state, and the pull rope emergency stop switch (5) is in an unsent state;

step two, roll changing state

The rolling mill stops and changes from a rolling state to a roll changing state, the PLC sends a walking instruction to the walking vehicle (1), the walking vehicle (1) moves forward to be close to the rolling mill, when the walking vehicle (1) reaches a front limit position and triggers a corresponding position switch, the position switch at the position sends a signal and causes the PLC to send the instruction to the tractor (2), the tractor (2) moves forward to be close to the front limit position and triggers the corresponding position switch, the position switch at the position sends a signal and causes the PLC to send the instruction to the clamping device (3), the clamping device (3) clamps the end of an old roll, the position switch of the clamping device (3) sends a signal and causes the PLC to send the instruction to the tractor (2), the tractor (2) moves backwards to be far away from the rolling mill, at the moment, due to the clamping action of the clamping device (3), the old roll is dragged into the all-electric roll changing system, when the tractor (2) returns to the rear limit position again and triggers the corresponding position, the position switch at the position sends a signal and causes the PLC to issue an instruction to the clamping device (3), the clamping device (3) loosens the roller end of the old roller, the roller system of the old roller completely enters the full-electric roller changing system, the position switch of the clamping device (3) sends a signal and causes the PLC to issue an instruction to the cross sliding vehicle (4), the cross sliding vehicle (4) moves to the right limit position and triggers the corresponding position switch, the new roller system of the left station is aligned with the window of the rolling mill, the position switch of the right limit position of the cross sliding vehicle (4) sends a signal and causes the PLC to issue an instruction to the clamping device (3), the clamping device (3) clamps the new roller end of the left station, the position switch of the clamping device (3) sends a signal and causes the PLC to issue an instruction to the tractor (2), the tractor (2) moves forward to be close to the rolling mill, at the moment, due to the clamping action of the clamping device (3), the new roller system is, when the tractor (2) reaches the front limit position to trigger the position switch of the position, the position switch of the position sends a signal and causes the PLC to issue an instruction to the clamping device (3), the clamping device (3) loosens the roll end of a new roll, the position switch of the clamping device (3) sends a signal and causes the PLC to issue an instruction to the tractor (2) after the loosening action is completed, the tractor (2) moves backwards to be away from the rolling mill, when the tractor (2) reaches the rear limit position and triggers the corresponding position switch, the position switch of the position sends a signal and causes the PLC to issue an instruction to the traveling vehicle (1), the traveling vehicle (1) moves backwards to be away from the rolling mill, when the traveling vehicle (1) reaches the rear limit position and triggers the corresponding position switch, the position switch of the position sends a signal and causes the PLC to issue an instruction to the traverse vehicle (4), and the traverse vehicle (4) moves left to the left limit position to trigger the corresponding position switch, at this time, the old roller system is lifted out, and one-time roller replacement is completed.

9. The method of roll change using an all-electric roll change system of a cold rolling mill of claim 8, wherein: in the whole roll changing process, once the pull rope emergency stop switch (5) is triggered, the whole roll changing system immediately stops all actions;