阅读说明：本技术 一种钢丝导开控制方法以及钢丝导开装置 (Steel wire unwinding control method and steel wire unwinding device ) 是由 马松 张晓辰 于 2021-09-29 设计创作，主要内容包括：本发明公开了一种钢丝导开装置,包括变频电机、连接于所述变频电机动力输出端的钢丝盘安装轴、摆动臂、角位移传感器以及超声波测距传感器,所述钢丝盘安装轴上设置有用于固定安装钢丝盘的安装工位,所述超声波测距传感器设置于与安装工位正对的位置用于采集超声波测距传感器到钢丝盘的距离；所述角位移传感器设置于摆动臂上用于采集摆动臂的角位移。本发明还提供一种钢丝导开控制方法,通过所述钢丝导开装置实现。采用上述技术方案,能够自动实时调整钢丝盘的转动速度,减小了人工的计算和调试时间,有效减小了钢丝张力,提高钢丝导开作业的稳定性。(The invention discloses a steel wire unwinding device which comprises a variable frequency motor, a steel wire disc mounting shaft connected to the power output end of the variable frequency motor, a swinging arm, an angular displacement sensor and an ultrasonic ranging sensor, wherein a mounting station for fixedly mounting a steel wire disc is arranged on the steel wire disc mounting shaft, and the ultrasonic ranging sensor is arranged at a position right opposite to the mounting station and used for acquiring the distance from the ultrasonic ranging sensor to the steel wire disc; the angular displacement sensor is arranged on the swing arm and used for acquiring the angular displacement of the swing arm. The invention also provides a steel wire unwinding control method which is realized by the steel wire unwinding device. By adopting the technical scheme, the rotating speed of the steel wire disc can be automatically adjusted in real time, the manual calculation and debugging time is reduced, the steel wire tension is effectively reduced, and the stability of the steel wire unwinding operation is improved.)

1. A steel wire unwinding control method is characterized by comprising the following steps:

driving a variable frequency motor to drive a steel wire disc to rotate at a power frequency F;

frequency of power supply；

Wherein V is the known linear speed of dragging the steel wire in the subsequent station, C is the perimeter of the outermost steel wire ring on the steel wire disc, f is the known rated frequency of the variable frequency motor, n is the known rated rotating speed of the variable frequency motor, and A is the unwinding speed coefficient.

2. The steel wire unwinding control method according to claim 1, wherein the unwinding speed coefficient a is obtained by the following formula:

；

wherein the content of the first and second substances,for a real analog of the angular displacement of the swing arm,for the maximum value of the analog quantity of angular displacement of the oscillating arm,the minimum value of the angular displacement analog quantity of the swing arm is obtained; the steel wire is led out from the steel wire disc and then bypasses a swinging wheel on the swinging arm, the actual analog quantity of the angular displacement of the swinging arm is obtained in real time through an angular displacement sensor, the maximum value of the analog quantity of the angular displacement of the swinging arm is a preset value when the swinging arm is at the maximum swinging angle, and the minimum value of the analog quantity of the angular displacement of the swinging arm is a preset value when the swinging arm is at the minimum swinging angle.

3. The wire unwinding control method according to claim 1, wherein the circumference C of the outermost wire turn on the wire drum is obtained by the following formula:

；

wherein the content of the first and second substances,is the actual analog quantity of the position of the outermost steel wire on the steel wire disc,is the maximum value of the analog quantity of the steel wire position of the outermost circle,is the minimum value of the analog quantity of the steel wire position of the outermost circle,for the known ultrasonic distance measuring sensors the distance from the axis of the wire disc,the distance of the known ultrasonic distance measuring sensor from the empty wire reel,the distance from the known ultrasonic ranging sensor to the fully-rolled steel wire disc is obtained; the actual analog quantity of the outermost ring of steel wire position on the steel wire disc is obtained in real time through the ultrasonic ranging sensor, the maximum value of the outermost ring of steel wire position analog quantity is a preset value corresponding to the distance from the ultrasonic ranging sensor to the empty steel wire disc, and the minimum value of the outermost ring of steel wire position analog quantity is a preset value corresponding to the distance from the ultrasonic ranging sensor to the full steel wire disc.

4. The wire unwinding control method according to claim 3, further comprising the step of obtaining a remaining amount of the wire on the wire reel, the remaining amount of the wireObtained by the following formula:

。

5. as in claimThe wire unwinding control method according to claim 4, characterized in that the wire unwinding control method further comprises a residual alarm step, that is, when the steel wire remainsAnd alarming when the current value is less than the preset value.

6. A steel wire unwinding equipment which characterized in that: the steel wire unwinding control method comprises a variable frequency motor, a steel wire disc mounting shaft connected to a power output end of the variable frequency motor, a swing arm, an angular displacement sensor and an ultrasonic distance measuring sensor, wherein a mounting station for fixedly mounting the steel wire disc is arranged on the steel wire disc mounting shaft, and the ultrasonic distance measuring sensor is arranged at a position opposite to the mounting station and used for collecting the distance from the ultrasonic distance measuring sensor to the steel wire disc; the angular displacement sensor is arranged on the swing arm and used for acquiring the angular displacement of the swing arm.

7. The wire unwinding device of claim 6, wherein: the steel wire unwinding device further comprises a fixed arm, an unwinding wheel is arranged on the fixed arm, and the steel wire is led out from the steel wire disc, bypasses the unwinding wheel, is guided by a swinging wheel on the swinging arm and then is connected to a subsequent station.

Technical Field

The invention relates to a steel wire unwinding control method and a steel wire unwinding device, and belongs to the technical field of tire production mechanical equipment.

Background

The bead ring for fastening the tire rim mainly aims to enhance the rigidity of the tire root, and is usually produced by winding a thin steel wire into a regular hexagonal shape through a bead ring winding production line. The unwinding device for the conventional steel wire ring winding production line adopts an unpowered passive pulling mode, namely a steel wire disc is arranged on the unwinding device, a steel wire is led out from the steel wire disc and enters a subsequent station after being guided by a guide wheel, and mechanical equipment of the subsequent station can pull the steel wire during operation, so that the steel wire is pulled to unwind by pulling the steel wire disc. However, the passive pulling method causes the steel wire to be subjected to an excessive pulling force, and sudden stop of the equipment under the condition of high-speed operation of the equipment also causes the steel wire on the unwinding device to be loosened and fall off or even to be broken.

Disclosure of Invention

Therefore, an object of the present invention is to provide a wire unwinding control method and a wire unwinding device, which actively unwind a wire by driving a wire reel to rotate by a motor, thereby reducing a wire tension and improving stability during a high-speed parking.

In order to achieve the above object, a wire unwinding control method of the present invention includes:

driving a variable frequency motor to drive a steel wire disc to rotate at a power frequency F;

frequency of power supply；

Wherein V is the known linear speed of dragging the steel wire in the subsequent station, C is the perimeter of the outermost steel wire ring on the steel wire disc, f is the known rated frequency of the variable frequency motor, n is the known rated rotating speed of the variable frequency motor, and A is the unwinding speed coefficient; the unwinding speed coefficient a is obtained by the following formula:

；

wherein the content of the first and second substances,for a real analog of the angular displacement of the swing arm,for the maximum value of the analog quantity of angular displacement of the oscillating arm,the minimum value of the angular displacement analog quantity of the swing arm is obtained; the steel wire is led out from the steel wire disc and then bypasses a swinging wheel on the swinging arm, the actual analog quantity of the angular displacement of the swinging arm is obtained in real time through an angular displacement sensor, the maximum value of the analog quantity of the angular displacement of the swinging arm is a preset value when the swinging arm is at the maximum swinging angle, and the minimum value of the analog quantity of the angular displacement of the swinging arm is a preset value when the swinging arm is at the minimum swinging angle.

The circumference C of the outermost wire on the wire disc is obtained by the following formula:

；

wherein the content of the first and second substances,is the actual analog quantity of the position of the outermost steel wire on the steel wire disc,is the maximum value of the analog quantity of the steel wire position of the outermost circle,is the minimum value of the analog quantity of the steel wire position of the outermost circle,for the known ultrasonic distance measuring sensors the distance from the axis of the wire disc,the distance of the known ultrasonic distance measuring sensor from the empty wire reel,the distance from the known ultrasonic ranging sensor to the fully-rolled steel wire disc is obtained; the actual analog quantity of the position of the outermost ring of steel wires on the steel wire disc is obtained in real time through an ultrasonic distance measuring sensor, and the outermost ringThe maximum value of the steel wire position analog quantity is a preset value corresponding to the distance between the ultrasonic ranging sensor and the empty-winding steel wire disc, and the minimum value of the outermost steel wire position analog quantity is a preset value corresponding to the distance between the ultrasonic ranging sensor and the full-winding steel wire disc.

The steel wire unwinding control method further comprises the step of obtaining the residual amount of the steel wire on the steel wire disc, wherein the residual amount of the steel wireObtained by the following formula:

。

the steel wire unwinding control method also comprises a step of residual quantity alarm, namely when the steel wire is residualAnd alarming when the current value is less than the preset value.

The invention also provides a steel wire unwinding device which is used for realizing the steel wire unwinding control method and comprises a variable frequency motor, a steel wire disc mounting shaft connected to the power output end of the variable frequency motor, a swinging arm, an angular displacement sensor and an ultrasonic ranging sensor, wherein the steel wire disc mounting shaft is provided with a mounting station for fixedly mounting the steel wire disc, and the ultrasonic ranging sensor is arranged at a position right opposite to the mounting station and used for acquiring the distance from the ultrasonic ranging sensor to the steel wire disc; the angular displacement sensor is arranged on the swing arm and used for acquiring the angular displacement of the swing arm.

The steel wire unwinding device further comprises a fixed arm, an unwinding wheel is arranged on the fixed arm, and the steel wire is led out from the steel wire disc, bypasses the unwinding wheel, is guided by a swinging wheel on the swinging arm and then is connected to a subsequent station.

By adopting the technical scheme, the steel wire unwinding control method and the steel wire unwinding device can automatically adjust the rotating speed of the steel wire disc in real time by automatically calculating the unwinding following speed, namely the power frequency F for driving the variable frequency motor to rotate, reduce the manual calculation and debugging time, effectively reduce the steel wire tension and improve the stability of the steel wire unwinding operation.

Drawings

Fig. 1 is a schematic structural view of a wire unwinding device according to the present invention.

Fig. 2 is a side view of the wire unwinding device according to the present invention.

Detailed Description

The invention is described in further detail below with reference to the figures and the detailed description.

As shown in fig. 1 and 2, the present invention provides a steel wire unwinding device, which comprises a frame assembly 1, a variable frequency motor 2 arranged on the frame assembly 1, a steel wire disc mounting shaft 3 connected to a power output end of the variable frequency motor 2, a fixing arm 4, a swing arm 5, an angular displacement sensor 6 and an ultrasonic distance measuring sensor 7.

The steel wire disc mounting shaft 3 is provided with a mounting station for fixedly mounting the steel wire disc, and the ultrasonic ranging sensor 7 is arranged at a position right opposite to the mounting station and used for collecting the distance from the ultrasonic ranging sensor 7 to the steel wire disc. Distance between ultrasonic distance measuring sensor 7 and axis of steel wire discIs a known value. For the steel wire discs with the same specification, the distance from the ultrasonic distance measuring sensor 7 to the full-winding steel wire disc can be collected in advanceAnd the distance from the ultrasonic distance measuring sensor 7 to the empty-winding steel wire coil. Presetting the distance between the ultrasonic distance measuring sensor 7 and the empty steel wire coilMaximum value of corresponding outermost steel wire position analog quantityAnd the distance from the ultrasonic distance measuring sensor 7 to the full-wound wire reelCorresponding minimum value of simulation quantity of steel wire position of outermost circle。

The fixed arm 4 is provided with an unwinding wheel 9, the swinging arm 5 is provided with a swinging wheel 8, and a steel wire is led out on a steel wire disc, bypasses the unwinding wheel 9, is guided by the swinging wheel 8 on the swinging arm 5 and then is connected to a subsequent station. The equipment at the subsequent station will exert a traction force on the wire and the linear speed V at which the wire is drawn is a known value.

The swing arm 5 forms a certain swing angle under the action of the steel wire, when the traction force is larger, the swing angle of the swing arm 5 is larger, and when the traction force is smaller, the swing angle of the swing arm 5 is smaller. The angular displacement sensor 6 is arranged on the swing arm 5 and used for acquiring the angular displacement of the swing arm 5.

Presetting the maximum value of the analog quantity of angular displacement of the swing arm 5 when the swing angle of the swing arm 5 is maximum toAnd the minimum value of the analog quantity of the angular displacement of the oscillating arm 5 when the oscillating angle of the oscillating arm 5 is minimum isReal-time acquisition of actual analog quantity of angular displacement of the swing arm 5 by the angular displacement sensor 6。

By the steel wire unwinding device, the following steel wire unwinding control method can be realized, namely:

driving a variable frequency motor 2 to drive a steel wire disc to rotate at a power frequency F;

the power supply frequency F is obtained by the following formula:

；

wherein C is the perimeter of the outermost steel wire on the steel wire disc, f is the known rated frequency of the variable frequency motor 2, n is the known rated rotating speed of the variable frequency motor 2, and A is the unwinding speed coefficient.

Specifically, the circumference C of the outermost steel wire on the wire disc is:

wherein R is the radius of the real-time outermost steel wire ring on the steel wire disc, and is obtained by the following formula:

；

whereinThe thickness of the steel wire that has been consumed in the radial direction of the wire disc is obtained by the following formula:

。

it can be seen that the circumference C of the outermost wire turn on the wire disc is obtained by the following formula:

。

in a preferred embodiment, the unwinding speed coefficient a is:

。

in addition, the steel wire unwinding control method further comprises the step of obtaining the residual amount of the steel wire on the steel wire disc, wherein the residual amount of the steel wireObtained by the following formula:

。

the steel wire unwinding control method also comprises a step of residual quantity alarm, namely when the steel wire is residualAnd alarming when the current value is less than the preset value.

By adopting the technical scheme, the steel wire unwinding control method and the steel wire unwinding device can automatically adjust the rotating speed of the steel wire disc in real time by automatically calculating the unwinding following speed, namely the power frequency F for driving the variable frequency motor 2 to rotate, reduce the manual calculation and debugging time, effectively reduce the steel wire tension and improve the stability of the steel wire unwinding operation.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.