CN-117737400-B - Air cushion furnace process section tension control equipment and control method

Abstract

The invention discloses tension control equipment for a process section of an air cushion furnace, which comprises a tensioner roller set, a detection mechanism, a furnace front carrier roller, a control system and a first detection device, wherein the tensioner roller set and the furnace front carrier roller are in winding fit with a belt material roller, the control system is in communication connection with the tensioner roller set and the detection mechanism respectively, the control system can control the rotating speed of the tensioner roller set according to the belt material tension degree parameter fed back by the detection mechanism, the detection mechanism comprises a first detection device and a second detection device, the first detection device detects the tension degree parameter of the belt material if the thickness of the belt material is smaller than a set thickness, and the second detection device detects the tension degree parameter of the belt material if the thickness of the belt material is larger than the set thickness. The tension control equipment for the air cushion furnace process section has higher control precision on the tension of the strip, and can meet the tension control requirement under the working condition of smaller tension. The invention also discloses a tension control method of the air cushion furnace process section, which uses the tension control equipment of the air cushion furnace process section.

Inventors

• MENG CHAO
• ZHOU YONG
• SHAN DAN

Assignees

• 西南铝业（集团）有限责任公司

Dates

Publication Date

20260508

Application Date

20231211

Claims (8)

1. 1. The tension control equipment for the air cushion furnace process section is characterized by comprising a tensioner roller set, a detection mechanism and a stoker carrier roller, wherein the tensioner roller set, the detection mechanism and the stoker carrier roller are sequentially arranged at the upstream of a furnace body of the air cushion furnace along the conveying direction of a strip, and the tensioner roller set and the stoker carrier roller are in winding fit with the strip roller; The control system is in communication connection with the tensioner roller set and the detection mechanism respectively, and can control the rotating speed of the tensioner roller set according to the belt tensioning degree parameters fed back by the detection mechanism; The detection mechanism comprises a first detection device and a second detection device, wherein if the thickness of the strip is smaller than the set thickness, the first detection device detects and obtains the tensioning degree parameter of the strip; The first detection device is a sagging detection device which is arranged between the tensioner roller set and the stokehole carrier roller along the conveying direction of the belt material, the sagging detection device is arranged above the midpoint of the belt material between the tensioner roller set and the stokehole carrier roller in a position, and the sagging detection device is in clearance fit with the belt material; The tension degree parameter of the strip detected by the first detection device is the sagging distance of the strip between the tensioner roller set and the stokehole carrier roller along the vertical direction; The second detection device comprises a lower tension measuring roller, a tensiometer and a lifting mechanism, wherein the lower tension measuring roller is arranged between the tensioner roller set and the stokehole carrier roller along the conveying direction of the belt material, the tensiometer is matched with the lower tension measuring roller, and the lower tension measuring roller is arranged below the midpoint of the belt material between the tensioner roller set and the stokehole carrier roller in an alignment manner; The second detection device further comprises two upper tension measuring rollers which are sequentially arranged between the tensioner roller set and the stokehole carrier roller along the conveying direction of the belt material, the upper tension measuring rollers are positioned above the belt material, a tension measuring gap which is in alignment fit with the lower tension measuring rollers along the vertical direction is formed between the two upper tension measuring rollers, and the lower tension measuring rollers can vertically lift and penetrate into the tension measuring gap in an alignment manner under the driving of the lifting mechanism so as to jack the belt material into the tension measuring gap from bottom to top and tension the belt material; The second detection device detects that the tension degree parameter of the obtained belt material is the measured value of the tensiometer.
2. 2. The air cushion furnace process section tension control device of claim 1, wherein the sag detection device is an ultrasonic range finder.
3. 3. The air cushion furnace process section tension control device of claim 1, wherein the tension meter is a piezomagnetic load cell.
4. 4. The air cushion furnace process section tension control device of claim 1, wherein the lifting mechanism is a worm gear mechanism.
5. 5. The air cushion furnace process section tension control apparatus of claim 1, wherein the first detection device is disposed vertically above the tension measurement gap.
6. 6. The air cushion furnace process section tension control device according to claim 1, wherein the control system comprises a man-machine interaction module, a PLC controller and a driving system which are in communication connection with each other; the PLC comprises PID regulators respectively matched with the man-machine interaction module and the driving system; The driving system comprises a motor for driving the tensioner roller set to operate and a driving frequency converter for controlling the rotating speed of the motor.
7. 7. A method for controlling the tension of a process section of an air cushion furnace, which adopts the air cushion furnace process section tension control equipment as claimed in any one of claims 1 to 6, and is characterized by comprising the steps of: Detecting parameters, namely detecting the strip between the tensioner roller set and the stokehold carrier roller by a detection mechanism to obtain a tensioning degree parameter of the strip, and transmitting and feeding back the tensioning degree parameter to a control system, wherein if the thickness of the strip is smaller than a set thickness, the first detection device detects the tensioning degree parameter of the strip; The data processing and control system calculates the actual value of the tensioning force of the band currently processed by the equipment according to the received tensioning degree parameter, and compares the actual value of the tensioning force with the target value of the tensioning force in the furnace preset by the equipment; And (3) compensating and adjusting, namely adjusting the rotating speed of the tensioner roller set according to the comparison result of the actual value of the tensioning force and the target value of the tensioning force in the furnace by the control system, so as to realize the adjustment of the tensioning force of the strip until the actual value of the tensioning force of the strip is adjusted to be equal to the target value of the tensioning force in the furnace.
8. 8. The method according to claim 7, wherein in the step of detecting parameters, if the tension parameter of the strip is detected and fed back by the first detecting means, the tension parameter is a sagging distance of the strip between the tensioner roller set and the forehearth roll in a vertical direction, and if the tension parameter of the strip is detected and fed back by the second detecting means, the tension parameter is a measured value of the tensiometer.

Description

Air cushion furnace process section tension control equipment and control method Technical Field The invention relates to the technical field of air cushion furnace process section tension control methods and supporting equipment thereof, in particular to air cushion furnace process section tension control equipment. The invention also relates to a tension control method of the air cushion furnace process section, which uses the tension control equipment of the air cushion furnace process section. Background The air cushion furnace is called an air cushion type continuous heat treatment furnace, which is a very common metal processing furnace device in actual production of metal rolling mills. In the actual operation of the air cushion furnace, the tension control of the processed metal strip determines the final process treatment effect and the product quality. The strip tension control mode of the existing air cushion furnace process section is usually an indirect control mode. The method comprises the steps of calculating target tension in a furnace through preset tensile stress values and combining data such as the width and the thickness of a strip, distributing the target tension to set moments of motors of tension roller sets according to moment proportions, adding friction loss compensation moment of a tensioning unit, inertia compensation moment during acceleration and deceleration and the like to the set moments, and limiting the moment of the tensioning unit by a frequency converter so as to achieve the purpose of controlling the tensile stress of the strip. However, because the friction loss compensation moment and the inertia compensation moment during acceleration and deceleration of the tensioning unit are rough compensation data in the prior art, the accurate compensation effect cannot be achieved, and when the working condition of the existing tension indirect control mode is required by smaller tension control, the tension is easy to vibrate greatly due to smaller target value of the tension control, and even the strip is narrowed in the air cushion furnace to cause scrap rolls due to overlarge regulation and control tension. This not only affects the processing effect of the air cushion furnace on the strip, but also adversely affects the quality of the corresponding product. Therefore, how to optimize the control accuracy of the strip tension at the process section of the air cushion furnace to meet the tension control requirement under the working condition of smaller tension is an important technical problem that needs to be solved by those skilled in the art at present. Disclosure of Invention The invention aims to provide tension control equipment for an air cushion furnace process section, which has higher control precision on strip tension and can meet the tension control requirement under the working condition of smaller tension. The invention further aims to provide a tension control method for the air cushion furnace process section, which is applied to the tension control equipment for the air cushion furnace process section. In order to solve the technical problems, the invention provides tension control equipment for a process section of an air cushion furnace, which comprises a tensioner roller set, a detection mechanism and a stoker carrier roller, wherein the tensioner roller set, the detection mechanism and the stoker carrier roller are sequentially arranged at the upstream of a furnace body of the air cushion furnace along the conveying direction of a strip, and the tensioner roller set and the stoker carrier roller are in winding fit with the strip roller; The control system is in communication connection with the tensioner roller set and the detection mechanism respectively, and can control the rotating speed of the tensioner roller set according to the belt tensioning degree parameters fed back by the detection mechanism; The detection mechanism comprises a first detection device and a second detection device, wherein the first detection device detects and obtains the tension degree parameter of the strip when the thickness of the strip is smaller than the set thickness, and the second detection device detects and obtains the tension degree parameter of the strip when the thickness of the strip is larger than the set thickness. Preferably, the first detection device is a sag detection device arranged between the tensioner roller set and the forehearth roll along the strip conveying direction, the sag detection device is arranged above a strip midpoint between the tensioner roller set and the forehearth roll in an alignment manner, and the sag detection device is in clearance fit with the strip; The tension degree parameter of the strip detected by the first detection device is the sagging distance of the strip between the tensioner roller set and the stokehole carrier roller along the vertical direction. Preferably, the sagging detection device is an ultrasonic distan