CN111495969A - Online adjustment monitoring system for line pressure of rolling machine - Google Patents
Online adjustment monitoring system for line pressure of rolling machine Download PDFInfo
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- CN111495969A CN111495969A CN202010242177.8A CN202010242177A CN111495969A CN 111495969 A CN111495969 A CN 111495969A CN 202010242177 A CN202010242177 A CN 202010242177A CN 111495969 A CN111495969 A CN 111495969A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
- B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
Abstract
The invention discloses an online adjustment monitoring system for line pressure of a rolling machine, which comprises a programmable controller P L C (11), a human-computer interface HMI (12), a first pressure transmitter (21), a second pressure transmitter (22), a third pressure transmitter (23), a fourth pressure transmitter (24), a hydraulic station total pressure transmitter (25), a hydraulic station proportional pressure reducing valve (31), an operation side inclined ferroelectric motor (32) and a driving side inclined ferroelectric motor (33), wherein the programmable controller P L C (11) is respectively connected with the first pressure transmitter (21), the second pressure transmitter (22), the third pressure transmitter (23), the fourth pressure transmitter (24) and the hydraulic station proportional pressure reducing valve (31) through signal lines.
Description
Technical Field
The invention relates to the technical field of adjustment and monitoring of line pressure in a lithium ion battery pole coil rolling process, in particular to an online adjustment and monitoring system of line pressure of a rolling machine.
Background
The lithium ion battery has the advantages of high voltage, high specific energy, more recycling times, long storage time and the like, is widely applied to portable electronic equipment such as mobile phones, digital cameras and portable computers, and is also widely applied to large and medium-sized electric equipment such as electric automobiles, electric bicycles, electric tools and the like, so that the performance requirement on the lithium ion battery is higher and higher.
At present, in the rolling process of the lithium ion battery pole coil, the rolling line pressure of a rolling machine cannot be accurately controlled, only the pressure of a hydraulic station and the position of an inclined iron are adjusted to perform rough adjustment, and the line pressure in the actual rolling process cannot be mastered. Therefore, when the fluctuation of the line pressure is large, if the fluctuation cannot be found in time, the fluctuation of the thickness and the range in the production process of the pole roll is large, and the consistency of the produced battery cannot be ensured after the pole roll is transferred to the subsequent process.
Disclosure of Invention
The invention aims to provide an online adjustment and monitoring system for the line pressure of a rolling machine, aiming at the technical defects in the prior art.
Therefore, the invention provides an online adjustment monitoring system for the line pressure of a rolling machine, wherein the left side and the right side of the rolling machine are respectively a driving side A and an operating side B;
the hydraulic station of the rolling machine comprises two sets of oil ways which are positioned on the left side and the right side, namely a driving side hydraulic oil way and an operating side hydraulic oil way;
the rolling machine comprises an upper roller and a lower roller which are distributed at intervals up and down;
the left end and the right end of the upper roller are respectively connected with an upper bearing seat;
the bottom of each upper bearing seat is connected with an upper inclined iron;
the left end and the right end of the lower roller are respectively connected with a lower bearing seat;
the top of each lower bearing seat is connected with a lower inclined iron;
the upper bearing seat and the lower bearing seat are arranged in an up-down symmetrical manner;
the upper inclined iron and the lower inclined iron are arranged in an up-and-down symmetrical manner; the lower oblique iron positioned on the left side is connected with the output end on the right side of the driving side oblique iron motor;
the lower inclined iron positioned on the right side is connected with the output end on the left side of the operation side inclined iron motor;
the bottom of each lower bearing seat is respectively connected with the driving output end at the top of one oil cylinder;
the driving side hydraulic oil circuit is connected with the oil cylinder positioned on the driving side;
the operation side hydraulic oil circuit is connected with the oil cylinder positioned on the operation side;
this online adjustment monitored control system, including programmable controller P L C, first pressure transmitter, second pressure transmitter, third pressure transmitter, fourth pressure transmitter and hydraulic pressure station proportion relief pressure valve, wherein:
the first pressure transmitter is arranged on the hydraulic oil circuit at the driving side, is used for measuring the hydraulic pressure of the hydraulic oil circuit at the driving side in real time and feeds the hydraulic pressure back to the programmable controller P L C;
the second pressure transmitter is arranged on the hydraulic oil circuit at the operation side, is used for measuring the hydraulic pressure of the hydraulic oil circuit at the operation side in real time and feeds the hydraulic pressure back to the programmable controller P L C;
a hydraulic station proportional pressure reducing valve is respectively arranged on the driving side hydraulic oil circuit and the operating side hydraulic oil circuit;
the programmable controller P L C is respectively connected with the first pressure transmitter and the second pressure transmitter through signal lines and is used for receiving pressure signals sent by the first pressure transmitter and the second pressure transmitter and then calculating and obtaining the lifting force F0 output by the hydraulic station according to a preset hydraulic station lifting force calculation formula;
the third pressure transmitter 23 is installed on the upper inclined iron and the lower inclined iron on the driving side, is used for measuring the distributed pressure of the upper bearing seat and the lower bearing seat on the driving side in real time, and feeds back the distributed pressure to the programmable controller P L C;
the fourth pressure transmitter is arranged on the upper inclined iron and the lower inclined iron on the operation side, is used for measuring the distribution pressure of the bearing seats of the upper bearing seat and the lower bearing seat on the operation side in real time and feeds back the distribution pressure to the programmable controller P L C;
the programmable controller P L C is also connected with the third pressure transmitter and the fourth pressure transmitter through signal lines respectively, and is used for receiving pressure signals sent by the third pressure transmitter and the fourth pressure transmitter, and then calculating according to a preset bearing seat stress calculation formula to obtain a bearing seat stress F1;
and the programmable controller P L C is connected with the hydraulic station proportional pressure reducing valves and is used for calculating and obtaining the rolling linear pressure P of the rolling machine according to the lifting force F0 output by the hydraulic station, the bearing seat stress F1 and the weight of a rolling machine roller for rolling by combining a preset linear pressure calculation formula, then comparing the rolling linear pressure P of the rolling machine with the maximum value of the preset linear pressure, and sending an adjusting signal to the two hydraulic station proportional pressure reducing valves when the rolling linear pressure P of the rolling machine is greater than the maximum value of the preset linear pressure so as to adjust the output pressure of a driving side hydraulic oil circuit and an operating side hydraulic oil circuit of the rolling machine hydraulic station.
The programmable controller P L C is further connected to the operation side oblique ferroelectric motor and the driving side oblique ferroelectric motor respectively, and is configured to send an operation control signal to the operation side oblique ferroelectric motor and the driving side oblique ferroelectric motor when the linear pressure P is greater than a preset maximum linear pressure value during rolling of the rolling machine, so as to adjust the size of the roll gap between the upper and lower rolls for rolling.
The programmable controller P L C is also connected with the total pressure transmitter of the hydraulic station through a signal line and is used for receiving a pressure signal sent by the total pressure transmitter of the hydraulic station so as to monitor the total pressure of the hydraulic station of the rolling machine in real time;
and the pressing station total pressure transmitter is arranged on a main pipeline of the rolling machine hydraulic station.
And the third pressure transmitter and the fourth pressure transmitter are strain gauges.
The programming controller P L C is also connected with the HMI and is used for sending the rolling time linear pressure P of the rolling machine to the HMI for displaying in real time, and setting preset parameters including a rolling time linear pressure value and a pressure alarm value through the HMI.
The calculation formula of the hydraulic station lifting force is preset and specifically comprises the following steps:
the output lifting force F0 of the hydraulic station is (P1+ P2) × S;
wherein, P1 is the drive side cylinder pressure measured by the first pressure transmitter, i.e. the drive side hydraulic oil circuit pressure;
p2, which is the operation side cylinder pressure measured by the second pressure transmitter, i.e., the operation side hydraulic oil line pressure;
the areas of the pistons using the oil cylinders on the two sides of the driving side and the operating side are equal to each other and are S.
The bearing seat stress calculation formula is preset, and specifically comprises the following steps:
bearing seat stress F1 ═ F1+ F2 × D;
wherein f1 is the stress measured by the third pressure transmitter;
f2 is the stress measured by the fourth pressure transmitter;
the contact area of the upper bearing seat and the lower bearing seat is D.
The preset linear pressure calculation formula is as follows:
the linear pressure P during rolling is (F0-F-mg)/L;
l is the stress length of the roller of the rolling machine in the rolling process;
f0 is the lifting force output by the hydraulic station;
f1 is bearing seat stress;
mg is the weight of the rolls.
Compared with the prior art, the online adjustment monitoring system for the line pressure of the rolling machine can accurately control the line pressure in the rolling process, and ensures that the line pressure in the rolling process is constant, so that high-quality pole pieces with good thickness consistency and small range can be output.
Drawings
FIG. 1 is a schematic structural diagram of an online adjustment monitoring system for line pressure of a rolling machine according to the present invention;
fig. 2 is a schematic view of an overall structure of a rolling machine applied to an online adjustment monitoring system for line pressure of the rolling machine according to the present invention.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.
Referring to fig. 1 and 2, the invention provides an online adjustment monitoring system for the line pressure of a rolling machine, wherein the left side and the right side of the rolling machine are respectively a driving side a and an operating side B;
the hydraulic station of the rolling machine comprises two sets of oil ways which are positioned on the left side and the right side, namely a driving side hydraulic oil way and an operating side hydraulic oil way;
the rolling machine comprises an upper roller 41 and a lower roller 42 which are distributed at intervals up and down;
the left end and the right end of the upper roller 41 are respectively connected with an upper bearing seat 51;
the bottom of each upper bearing seat 51 is connected with an upper inclined iron 61;
the left and right ends of the lower roller 42 are respectively connected with a lower bearing seat 52;
a lower wedge 62 is connected to the top of each lower bearing seat 52;
the upper bearing seat 51 and the lower bearing seat 52 are arranged in an up-down symmetrical manner;
the upper inclined iron 61 and the lower inclined iron 62 are arranged in an up-and-down symmetrical manner; the lower oblique iron 62 positioned on the left side is connected with the output end on the right side of the driving side oblique iron motor 33;
a lower ramp 62 on the right side connected to the output terminal on the left side of the operation side ramp motor 32;
the bottom of each lower bearing seat 52 is connected with a driving output end (such as a piston rod) at the top of one oil cylinder 80;
a drive-side hydraulic oil passage connected to the drive-side oil cylinder 80 (i.e., the left-side oil cylinder);
an operation-side hydraulic oil passage connected to the oil cylinder 80 on the operation side (i.e., the right-side oil cylinder);
the online adjustment monitoring system further comprises a programmable controller P L C11, a first pressure transmitter 21, a second pressure transmitter 22, a third pressure transmitter 23, a fourth pressure transmitter 24 and a hydraulic station proportional pressure reducing valve 31, wherein:
the first pressure transmitter 21 is installed on a hydraulic oil circuit at the driving side, is used for measuring the hydraulic pressure of the hydraulic oil circuit at the driving side in real time, and feeds the hydraulic pressure back to the programmable controller P L C11;
the second pressure transmitter 22 is installed on the hydraulic oil circuit at the operation side, is used for measuring the hydraulic pressure of the hydraulic oil circuit at the operation side in real time, and feeds the hydraulic pressure back to the programmable controller P L C11;
a hydraulic station proportional pressure reducing valve 31 is respectively arranged on the driving side hydraulic oil circuit and the operating side hydraulic oil circuit;
the programmable controller P L C11 is respectively connected with the first pressure transmitter 21 and the second pressure transmitter 22 through signal lines, and is used for receiving pressure signals sent by the first pressure transmitter 21 and the second pressure transmitter 22, and then calculating and obtaining a lifting force F0 output by the hydraulic station according to a preset hydraulic station lifting force calculation formula;
the third pressure transmitter 23 is mounted on the inclined iron on the driving side (specifically comprising an upper inclined iron and a lower inclined iron on the driving side), and is used for measuring the distributed pressure of an upper bearing seat and a lower bearing seat on the driving side in real time and feeding back the pressure to the programmable controller P L C11;
the fourth pressure transmitter 24 is installed on the operation side wedge (specifically including the upper wedge and the lower wedge on the operation side), and is used for measuring the distributed pressure of the upper bearing seat and the lower bearing seat on the operation side in real time and feeding back the pressure to the programmable controller P L C11;
the programmable controller P L C11 is further connected to the third pressure transmitter 23 and the fourth pressure transmitter 24 through signal lines, respectively, and is configured to receive pressure signals sent by the third pressure transmitter 23 and the fourth pressure transmitter 24, and then calculate to obtain a bearing seat stress F1 according to a preset bearing seat stress calculation formula;
and the programmable controller P L C11 is connected with the hydraulic station proportional reducing valves 31 and is used for calculating and obtaining the rolling linear pressure P of the rolling mill according to the lifting force F0 output by the hydraulic station, the bearing seat stress F1 and the weight of the rolling mill roller for rolling by combining a preset linear pressure calculation formula, then comparing the rolling linear pressure P of the rolling mill with a preset linear pressure maximum value, and when the rolling linear pressure P of the rolling mill is greater than the preset linear pressure maximum value, sending an adjusting signal (specifically a PID adjusting signal) to the two hydraulic station proportional reducing valves 31 to realize the adjustment of the output pressures of the hydraulic stations of the rolling mill (namely the output pressures of the hydraulic oil circuit on the driving side and the hydraulic oil circuit on the operating side).
In the present invention, in a specific implementation, the programmable controller P L C11 is further connected to the operation side oblique ferroelectric motor 32 and the driving side oblique ferroelectric motor 33, respectively, and is configured to send an operation control signal to the operation side oblique ferroelectric motor 32 and the driving side oblique ferroelectric motor 33 when the linear pressure P during rolling of the rolling machine is greater than a preset maximum linear pressure value, so as to adjust a roll gap between an upper roll and a lower roll for rolling, thereby ensuring the stability of the linear pressure of the rolling machine.
In the invention, in a specific implementation, the programmable controller P L C11 is further connected with the hydraulic station total pressure transmitter 25 through a signal line, and is used for receiving a pressure signal sent by the hydraulic station total pressure transmitter 25, so as to monitor the total pressure of the hydraulic station of the rolling machine in real time and ensure the safe use of the hydraulic station;
and the hydraulic station total pressure transmitter 25 is arranged on a main pipeline of the hydraulic station of the rolling machine.
In the present invention, in a specific implementation, the third pressure transmitter 23 and the fourth pressure transmitter 24 are strain gauges.
In the present invention, in a concrete implementation, the programmable controller P L C11 is further connected to an HMI (human machine interface) 12, and is configured to send the rolling time linear pressure P of the roller mill to the HMI (human machine interface) 12 in real time for displaying, and set relevant preset parameters such as a required rolling time linear pressure value and a pressure alarm value through the HMI (human machine interface) 12.
In the invention, it should be noted that the main structure of the hydraulic station system of the rolling machine comprises an oil pump, a motor, an oil tank, a proportional pressure reducing valve, an overflow valve, a pipeline and an oil cylinder, wherein the oil cylinder is usually arranged on a bearing seat of a lower roller, the oil cylinder can jack the lower roller after given pressure, the upper roller and the lower roller can have certain clearance and certain distributed linear pressure, rolling force is generated when the rolling roller rotates, and a pole piece is rolled.
In the invention, the hydraulic station provides pressure, electric energy is converted into mechanical energy through a motor, a control valve, an oil way and the like, and the mechanical energy is acted on a lower bearing seat (namely a lower roller bearing seat) by an oil cylinder.
Wherein, the bottom of the lower roll bearing block (lower bearing block 52) is provided with an oil cylinder, and a driving side and an operating side are respectively provided with one group for lifting the lower roll 42, so that the upper roll 41 and the lower roll 42 are close to each other and a certain gap is kept.
Wherein, an upper inclined iron 61 and a lower inclined iron 62 are arranged between the upper bearing seat 51 and the lower bearing seat 52, and a driving side and an operating side are respectively provided with one set for adjusting the clearance between the upper roller and the lower roller and adjusting the force distributed between the upper roller and the lower roller. The inclined iron motor is arranged on the lower inclined iron and used for adjusting the position of the lower inclined iron so as to achieve the purpose of adjusting the roll gap.
In the invention, in a concrete implementation, the first pressure transmitter 21 is installed on the hydraulic oil circuit at the driving side, and is used for measuring the hydraulic pressure of the hydraulic oil circuit at the driving side in real time and feeding back the pressure to the P L C;
a second pressure transmitter 22 installed on the operation side hydraulic circuit for measuring the hydraulic pressure of the operation side hydraulic circuit in real time and feeding back to P L C
The third pressure transmitter 23 is mounted on the inclined iron on the driving side (specifically comprising an upper inclined iron and a lower inclined iron on the driving side), and is used for measuring the distributed pressure of an upper bearing seat and a lower bearing seat on the driving side in real time and feeding back the pressure to the programmable controller P L C11;
the fourth pressure transmitter 24 is used for being installed on the operation side inclined iron (specifically comprising an upper inclined iron and a lower inclined iron which are positioned on the operation side), measuring the distributed pressure of an upper bearing seat and a lower bearing seat which are positioned on the operation side in real time and feeding back the distributed pressure to the programmable controller P L C11;
the hydraulic station total pressure transmitter 25 is installed on a main pipeline of the hydraulic station, and is used for monitoring the total pressure of the hydraulic station in real time and feeding back the total pressure to P L C, so that the stability of the pressure is ensured and the pressure is kept in a safe range.
The hydraulic station proportional pressure reducing valve 31 is installed behind a reversing valve of the hydraulic station and used for controlling the oil pressure of a branch oil path (namely a driving side hydraulic oil path or an operating side hydraulic oil path) and ensuring the constant pressure of the line or adjusting the pressure according to a program.
The method comprises the following specific operation realization processes of carrying a pole piece roll to the unreeling position of a rolling machine after the pole piece roll is coated on a battery pole piece, starting belt jointing and rolling after the pole piece roll is placed, setting reeling and unreeling tension, driving side pressure, operating side pressure and a roll gap between an upper roll and a lower roll according to the process requirements, lifting a roll to roll after the pole piece roll to be rolled reaches the positions of the upper roll and the lower roll, adjusting the roll gap and an oblique iron to enable the thickness and the range of the pole piece to meet the process requirements after the pole piece is rolled, and formally accelerating the rolling.
In order to more clearly understand the technical solution of the present invention, the following describes the working principle of the present invention.
According to the invention, the method detects the position pressure and strain of the hydraulic station, the hydraulic cylinder, the inclined iron and the like through the various installed pressure transmitters, transmits related data to the P L C, sends action instructions to the hydraulic station and the inclined iron driving motor through calculation processing, and finally realizes fine adjustment of linear pressure, and meanwhile, the HMI connected with the P L C collects related data for display and parameter setting.
It should be noted that the programmable controller P L C12 acquires signals from the hydraulic cylinder (i.e., oil cylinder) and the pressure transmitter at the position of the wedge, converts the signals into specific pressure values, and calculates the specific pressure values to obtain the linear pressure during rolling.
For the invention, the programmable controller P L C, the hydraulic station motor and the wedge motor form closed-loop control, after the linear pressure is set through the HMI, the P L C controls the hydraulic station pressure and the position of the wedge, ensures that the actual linear pressure changes in the technical range, and keeps the linear pressure constant.
For the present invention, the hydraulic station total pressure transmitter 25 is used to measure the pressure P0 of the hydraulic station, and then divided into two paths, the pressure of each path being controlled by two proportional pressure reducing valves. The first pressure transmitter 21(PT1) and the second pressure transmitter 22(PT2) measure a drive-side cylinder pressure P1 (i.e., a drive-side hydraulic line pressure) and an operation-side cylinder pressure P2 (i.e., an operation-side hydraulic line pressure), respectively. Since the areas of the pistons of the cylinders used on both the drive side and the operation side are equal to each other and are S, the output thrust force F0 of the hydraulic station is (P1+ P2) × S.
The stress obtained by measurement of the third pressure transmitter 23 and the fourth pressure transmitter 24 (i.e. the strain gauges PT3 and PT 4) mounted on the inclined iron on the two sides of the driving side and the operating side is F1 and F2 respectively, and the contact area of the upper bearing seat and the lower bearing seat is D, so that the bearing seat stress (i.e. the stress of the upper bearing seat and the lower bearing seat) F1 is (F1+ F2) D.
In addition, the stress length of the roller of the rolling machine in the rolling process is L, the linear pressure is uniformly distributed to be P, the lower roller is subjected to stress analysis, F0 is F1+ mg + P L, namely the pushing force F0 output by the hydraulic station is equal to the bearing seat stress F1 plus the roller surface stress (namely P L), and the weight of the roller (namely mg) is added, so that the linear pressure P in the rolling process is (F0-F-mg)/L because the upper roller and the lower roller are in stress balance.
It should be noted that, for the invention, by adjusting and monitoring the line pressure of the rolling machine, the fluctuation and change condition of the line pressure can be accurately mastered, real-time adjustment can be performed, and the line pressure is ensured to be stable, thereby ensuring that the rolled pole piece has uniform thickness and small range difference, and ensuring the consistency of the pole piece.
The invention is suitable for automatic adjustment and monitoring of the line pressure in the rolling process of the lithium ion battery pole coil, can accurately adjust and monitor the rolling line pressure, and ensures the accuracy of the line pressure in the rolling process. The invention is also suitable for monitoring and adjusting the line pressure of other rolling equipment.
In summary, compared with the prior art, the online adjustment monitoring system for the line pressure of the rolling machine provided by the invention can accurately control the line pressure in the rolling process, and ensure that the line pressure in the rolling process is constant, so that high-quality pole pieces with good thickness consistency and small range can be output.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The online adjustment and monitoring system for the line pressure of the rolling machine is characterized in that the left side and the right side of the rolling machine are respectively a driving side A and an operating side B;
the hydraulic station of the rolling machine comprises two sets of oil ways which are positioned on the left side and the right side, namely a driving side hydraulic oil way and an operating side hydraulic oil way;
the rolling machine comprises an upper roller (41) and a lower roller (42) which are distributed at intervals up and down;
the left end and the right end of the upper roll (41) are respectively connected with an upper bearing seat (51);
the bottom of each upper bearing seat (51) is connected with an upper inclined iron (61);
the left end and the right end of the lower roller (42) are respectively connected with a lower bearing seat (52);
the top of each lower bearing seat (52) is connected with a lower inclined iron (62);
the upper bearing seat (51) and the lower bearing seat (52) are arranged in an up-down symmetrical manner;
the upper inclined iron (61) and the lower inclined iron (62) are arranged in an up-and-down symmetrical manner; the lower oblique iron (62) positioned on the left side is connected with the output end on the right side of the oblique iron motor (33) on the driving side;
the lower oblique iron (62) positioned on the right side is connected with the output end on the left side of the operation side oblique iron motor (32);
the bottom of each lower bearing seat (52) is respectively connected with the driving output end at the top of one oil cylinder (80);
the driving side hydraulic oil circuit is connected with an oil cylinder (80) positioned on the driving side;
an operation side hydraulic oil path connected to an oil cylinder (80) on the operation side;
this online adjustment monitored control system, including programmable controller P L C (11), first pressure transmitter (21), second pressure transmitter (22), third pressure transmitter (23), fourth pressure transmitter (24) and hydraulic pressure station proportion relief pressure valve (31), wherein:
the first pressure transmitter (21) is arranged on the hydraulic oil circuit at the driving side, is used for measuring the hydraulic pressure of the hydraulic oil circuit at the driving side in real time and feeds the hydraulic pressure back to the programmable controller P L C (11);
the second pressure transmitter (22) is arranged on the hydraulic oil circuit at the operation side, is used for measuring the hydraulic pressure of the hydraulic oil circuit at the operation side in real time and feeds the hydraulic pressure back to the programmable controller P L C (11);
a hydraulic station proportional pressure reducing valve (31) is respectively arranged on the driving side hydraulic oil circuit and the operating side hydraulic oil circuit;
the programmable controller P L C (11) is respectively connected with the first pressure transmitter (21) and the second pressure transmitter (22) through signal lines and is used for receiving pressure signals sent by the first pressure transmitter (21) and the second pressure transmitter (22) and then calculating and obtaining a lifting force F0 output by the hydraulic station according to a preset hydraulic station lifting force calculation formula;
the third pressure transmitter (23) is arranged on the upper inclined iron and the lower inclined iron on the driving side, is used for measuring the distributed pressure of the upper bearing seat and the lower bearing seat on the driving side in real time and feeding back the distributed pressure to the programmable controller P L C (11);
the fourth pressure transmitter (24) is arranged on the upper inclined iron and the lower inclined iron on the operation side, is used for measuring the pressure distribution of the upper bearing seat and the lower bearing seat on the operation side in real time and feeding back the pressure distribution to the programmable controller P L C (11);
the programmable controller P L C (11) is also connected with the third pressure transmitter (23) and the fourth pressure transmitter (24) through signal lines respectively, is used for receiving pressure signals sent by the third pressure transmitter (23) and the fourth pressure transmitter (24), and then calculates and obtains a bearing seat stress F1 according to a preset bearing seat stress calculation formula;
and the programmable controller P L C (11) is connected with the hydraulic station proportional reducing valves (31) and is used for calculating and obtaining the rolling linear pressure P of the rolling machine according to the lifting force F0 output by the hydraulic station, the bearing seat stress F1 and the weight of the rolling machine roller for rolling by combining a preset linear pressure calculation formula, then comparing the rolling linear pressure P of the rolling machine with the preset maximum linear pressure value, and when the rolling linear pressure P of the rolling machine is greater than the preset maximum linear pressure value, sending an adjusting signal to the two hydraulic station proportional reducing valves (31) to realize the adjustment of the output pressures of the driving side hydraulic oil circuit and the operating side hydraulic oil circuit of the rolling machine hydraulic station.
2. The system for on-line adjustment and monitoring of line pressure of roller mill as claimed in claim 1, wherein the programmable controller P L C (11) is further connected to the operation side oblique ferroelectric motor (32) and the driving side oblique ferroelectric motor (33), respectively, for sending operation control signals to the operation side oblique ferroelectric motor (32) and the driving side oblique ferroelectric motor (33) to adjust the size of the roll gap between the upper and lower rolls for rolling when the line pressure P is greater than the preset maximum value of the line pressure during rolling of the roller mill.
3. The online adjustment monitoring system for line pressure of the roller mill of claim 1, characterized in that the programmable controller P L C (11) is further connected to the hydraulic station total pressure transmitter (25) through a signal line for receiving a pressure signal from the hydraulic station total pressure transmitter (25) to monitor the total pressure of the roller mill hydraulic station in real time;
and the hydraulic station total pressure transmitter 25 is arranged on a main pipeline of the hydraulic station of the rolling machine.
4. The online adjustment monitoring system of bucking line pressure as claimed in claim 1, characterized in that the third pressure transmitter (23) and the fourth pressure transmitter (24) are strain gauges.
5. The online adjustment monitoring system for line pressure of roller mill as claimed in claim 1, wherein the programmed controller P L C (11) is further connected to the HMI (12) for transmitting the rolling time line pressure P of the roller mill to the HMI (12) in real time for displaying, and setting preset parameters including the rolling time line pressure value and the pressure alarm value through the HMI (12).
6. The system for on-line adjustment and monitoring of line pressure of a roller press as claimed in claim 1, wherein the hydraulic station lifting force calculation formula is preset as follows:
the output lifting force F0 of the hydraulic station is (P1+ P2) × S;
wherein, P1 is the pressure of the oil cylinder at the driving side measured by the first pressure transmitter (21), namely the pressure of the hydraulic oil circuit at the driving side;
p2, which is the operation side cylinder pressure measured by the second pressure transmitter (22), i.e., the operation side hydraulic oil line pressure;
the areas of the pistons using the oil cylinders on the two sides of the driving side and the operating side are equal to each other and are S.
7. The system for on-line adjustment and monitoring of line pressure of a rolling machine according to claim 6, wherein a bearing seat stress calculation formula is preset, and specifically, the following formula is adopted:
bearing seat stress F1 ═ F1+ F2 × D;
wherein f1 is the stress measured by the third pressure transmitter (23);
f2 is the stress measured by the fourth pressure transmitter (24);
the contact area of the upper bearing seat and the lower bearing seat is D.
8. The system for on-line adjustment and monitoring of line pressure of a roller press as claimed in claim 7, wherein the preset line pressure calculation formula is as follows:
the linear pressure P during rolling is (F0-F-mg)/L;
l is the stress length of the roller of the rolling machine in the rolling process;
f0 is the lifting force output by the hydraulic station;
f1 is bearing seat stress;
mg is the weight of the rolls.
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| CN202010242177.8A CN111495969B (en) | 2020-03-31 | 2020-03-31 | Online adjustment monitoring system for line pressure of rolling machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115990618B (en) * | 2023-03-23 | 2023-05-16 | 太原理工大学 | Rolling mill roll gap compensation device and method |
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| CN111495969B (en) | 2021-10-26 |
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