阅读说明：本技术 一种卷取机张力控制系统 (Tension control system of coiling machine ) 是由 伊京龙 张海虎 张纯 杜卓君 张贺明 张述柏 于 2020-08-07 设计创作，主要内容包括：本发明公开了一种卷取机张力控制系统,包括卷取机配电柜、现场操作柜以及卷取机驱动机构,卷取机驱动机构与卷取机配电柜相连接,卷取机配电柜与现场操作柜相连接,还包括主控制柜、触摸屏以及卷径增量检测机构,卷径增量检测机构为接近开关,接近开关固定于卷取机的传动轴一侧用于检测卷轴转动圈数,接近开关与现场操作柜相连接,现场操作柜与主控制柜相连接。本发明采用上述结构的一种卷取机张力控制系统,通过将张力控制改为主控制柜控制给定,使得随着卷径的增加,张力给定值逐步递减,避免了因恒张力过大造成的板面粘伤及卷边错层,在铝板带箔轧制过程中,消除了粘伤性孔洞缺陷,减少了轧制断带,提高了铝箔成品率及产品质量。(The invention discloses a tension control system of a coiling machine, which comprises a coiling machine power distribution cabinet, a field operation cabinet and a coiling machine driving mechanism, wherein the coiling machine driving mechanism is connected with the coiling machine power distribution cabinet, the coiling machine power distribution cabinet is connected with the field operation cabinet, the tension control system also comprises a main control cabinet, a touch screen and a coiling diameter increment detection mechanism, the coiling diameter increment detection mechanism is a proximity switch, the proximity switch is fixed on one side of a transmission shaft of the coiling machine and used for detecting the number of turns of a coiling shaft, the proximity switch is connected with the field operation cabinet, and the field operation cabinet is connected with the main control cabinet. According to the tension control system of the coiling machine with the structure, tension control is changed into control setting of the main control cabinet, so that the tension set value is gradually decreased along with the increase of the coiling diameter, the defects of plate surface adhesion and edge rolling dislocation caused by overlarge constant tension are avoided, the defects of adhesion holes are eliminated in the process of rolling an aluminum plate strip foil, the rolling strip breakage is reduced, and the yield and the product quality of an aluminum foil are improved.)

1. A tension control system of a coiling machine comprises a coiling machine power distribution cabinet, a field operation cabinet and a coiling machine driving mechanism, wherein the coiling machine driving mechanism is connected with the coiling machine power distribution cabinet, the coiling machine power distribution cabinet is connected with the field operation cabinet, and the tension control system is characterized in that: the reel diameter increment detection mechanism is a proximity switch, the proximity switch is fixed on one side of a transmission shaft of the coiling machine and used for detecting the number of turns of a reel, the proximity switch is connected with the field operation cabinet, and the field operation cabinet is connected with the main control cabinet.

2. A coiler tension control system according to claim 1, characterized in that: the main control cabinet comprises a PLC control module, an analog input module, a digital output module and a storage module, wherein the analog input module is used for collecting current and speed signals of the coiling direct current motor.

3. A coiler tension control system according to claim 2, characterized in that: the field operation cabinet comprises a communication module and a digital input module, the digital input module is connected with the proximity switch, the digital input module transmits data to the PLC control module through the communication module for calculation, the PLC control module controls the suction and release of the relay through the digital output module, and the relay is connected with the coiling main contactor and used for controlling the closing and opening of the coiling contactor.

4. A coiler tension control system according to claim 5, characterized in that: the coil diameter X is calculated through the number of turns of the reel,

X＝2*C+D，

wherein, for panel thickness, C is the spool number of revolutions, and D is the spool diameter.

5. A coiler tension control system according to claim 4, characterized in that: the actual tension F is calculated from the coil diameter,

F＝F0*[1-k(1-D0/D)]

wherein F0 is the set tension, the tension gradient control coefficient k, the D0 initial winding diameter and the real-time winding diameter D.

6. A coiler tension control system according to claim 5, characterized in that: the PLC control module is connected with a direct current speed regulator in the power distribution cabinet of the coiling machine through the digital quantity output module, the direct current speed regulator is connected with a coiling direct current motor in the driving mechanism of the coiling machine, and the coiling direct current motor is connected with a coiling scroll through a speed reducer.

Technical Field

The invention relates to a tension control system of a coiling machine.

Background

In the industrial control industry, a strip product needs to control tension to meet production requirements, and a casting and rolling coiler is an aluminum plate rolling mechanism. After being rolled by the roller, the aluminum plate is conveyed to a reel of a coiling machine through a pinch roller, an aluminum plate material head is clamped by expanding through an expansion and contraction valve, and the reel drives a speed reducer to rotate in a constant direction through a direct current motor to finish the collection of coiled materials. Most of the tension control systems of the current coiling machines are constant tension control. The tension adjustment is controlled by a voltage signal of 0-10V through a 10K multi-turn potentiometer. The potentiometer is controlled to be affected by the service life, after the potentiometer is used for a period of time, the output voltage is unstable due to unsmooth resistance adjustment, and then the tension control of the coiling motor is unstable directly. Therefore, the potentiometer needs to be replaced periodically. The potentiometer is given as a fixed value, gradient adjustment cannot be carried out along with the increase of the roll diameter, and the plate surface is easily stuck due to overlarge tension when the aluminum roll is rolled up greatly, so that the product quality of the next process is influenced. With the improvement of the product quality requirement, the production and use requirements can not be met.

Disclosure of Invention

The tension control system of the coiling machine provided by the invention has the advantages that the tension control is changed into the control setting of the main control cabinet, so that the tension set value is gradually decreased along with the increase of the coiling diameter, the plate surface sticking and the edge rolling staggered floor caused by overlarge constant tension are avoided, the defects of sticking holes are eliminated in the rolling process of an aluminum plate strip foil, the rolling strip breakage is reduced, and the yield and the product quality of the aluminum foil are improved.

In order to achieve the purpose, the invention provides a tension control system of a coiling machine, which comprises a coiling machine power distribution cabinet, a field operation cabinet and a coiling machine driving mechanism, wherein the coiling machine driving mechanism is connected with the coiling machine power distribution cabinet, the coiling machine power distribution cabinet is connected with the field operation cabinet, the tension control system also comprises a main control cabinet, a touch screen arranged on the field operation cabinet and a coil diameter increment detection mechanism, the coil diameter increment detection mechanism is a proximity switch, the proximity switch is fixed on one side of a transmission shaft of the coiling machine and used for detecting the number of turns of a reel, the proximity switch is connected with the field operation cabinet, and the field operation cabinet is connected with the main control cabinet.

Preferably, the main control cabinet comprises a PLC control module, an analog input module, a digital output module and a storage module, wherein the analog input module is used for collecting current and speed signals of the coiling direct current motor.

Preferably, the field operation cabinet comprises a communication module and a digital input module, the digital input module is connected with the proximity switch, the digital input module transmits data to the PLC control module through the communication module for calculation, the PLC control module controls the attraction and release of the relay through the digital output module, and the relay is connected with the coiling main contactor and used for controlling the closing and opening of the coiling contactor.

Preferably, the winding diameter X is calculated by the number of turns of the winding shaft,

X＝2*C+D，

wherein, for panel thickness, C is the spool number of revolutions, and D is the spool diameter.

Preferably, the actual tension F is calculated from the coil diameter,

F＝F0*[1-k(1-D0/D)]

wherein F0 is the set tension, the tension gradient control coefficient k, the D0 initial winding diameter and the real-time winding diameter D.

Preferably, the PLC control module is connected with a direct current speed regulator in the power distribution cabinet of the coiling machine through the digital quantity output module, the direct current speed regulator is connected with a coiling direct current motor in the driving mechanism of the coiling machine, and the coiling direct current motor is connected with a coiling reel through a speed reducer.

Therefore, the tension control system of the coiling machine with the structure is adopted, after the coiled material is threaded and coiled, an initial tension value is given, the proximity switch is additionally arranged on the transmission shaft part of the coiling machine, the proximity switch is switched on every time the reel rotates for one circle, the PLC control module records the increasing value of the coil diameter, the tension given value is gradually decreased along with the increase of the coil diameter, the plate surface adhesion and the edge rolling staggered layer caused by overlarge constant tension are avoided, the adhesion hole defect is eliminated, the rolling broken strip is reduced, the aluminum foil yield and the product quality are improved, and the product is ensured to meet the quality and performance requirements.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic structural diagram of a tension control system of a coiler.

Detailed Description