阅读说明：本技术 一种倍尺飞剪信号处理方法 (Multi-scale flying shear signal processing method ) 是由 蔡仁吉 房金乐 黄晶 于 2019-08-30 设计创作，主要内容包括：本发明公开了一种倍尺飞剪信号处理方法,具体按照以下步骤进行：步骤1,根据两个剪刃的位置,确定剪前热检位置；步骤2,根据步骤1中得到的剪前热检位置,确定剪后热检位置步骤3,根据钢头通过剪前热检位置、剪后热检位置时检测到的信号,进行信号处理；步骤4,根据处理后的信号,生成剪切许可信号,对钢件进行剪切；步骤5,根据钢尾通过剪前热检位置、剪后热检位置时检测到的信号,进行信号处理,本发明通过对信号进行滤波和延迟处理,给控制器提供可靠的与现场相符的信号,控制完成钢件剪切,通过对信号进行处理,减少系统误差,提高了剪切精度。(The invention discloses a method for processing signals of a multiple-length flying shear, which is specifically carried out according to the following steps: step 1, determining a thermal detection position before shearing according to the positions of two shearing edges; step 2, determining a post-shearing thermal detection position according to the pre-shearing thermal detection position obtained in the step 1, and performing signal processing according to signals detected when the steel head passes through the pre-shearing thermal detection position and the post-shearing thermal detection position; step 4, generating a shearing permission signal according to the processed signal, and shearing the steel part; and 5, processing the signals according to the signals detected when the steel tail passes through the pre-shearing thermal detection position and the post-shearing thermal detection position.)

1. A method for processing signals of a multiple-length flying shear is characterized by comprising the following steps:

step 1, determining a thermal detection position before shearing according to the positions of two shearing edges;

step 2, determining the thermal detection position after shearing according to the thermal detection position before shearing obtained in the step 1

Step 3, processing signals according to signals detected when the steel head passes through a pre-shearing thermal detection position and a post-shearing thermal detection position;

step 4, generating a shearing permission signal according to the processed signal, and shearing the steel part;

and 5, processing signals according to the signals detected when the steel tail passes through the pre-shearing thermal detection position and the post-shearing thermal detection position.

2. The method for processing signals of multiple-length flying shears according to claim 1, wherein in the step 1, the position of the thermal detection before shearing is set to be away from the shear blade according to the rotating circumference of any shear blade

3. The method for processing signals of multiple-length flying shears according to claim 1, wherein in the step 2, according to the pre-shearing thermal detection position obtained in the step 1, the post-shearing thermal detection position is,

4. The method for processing signals of multiple-length flying shears according to claim 1, wherein the step 3 is specifically as follows:

3.1, starting to detect a signal through a controller when the steel head of the steel part reaches a hot detection position before shearing, judging the signal to be effective by the controller after the signal lasts for 200ms, and setting the signal as a steel signal;

step 3.2, if the signal duration is less than 200ms during signal detection, filtering the signal as a disturbance signal;

and 3.2, the steel head passes through the pre-shearing thermal detection position and reaches the post-shearing thermal detection position, the signal is detected through the controller, the controller judges that the signal is effective after the signal lasts for 20ms, the signal is used as a steel signal and is set, and if the signal duration is less than 20ms, the signal is reset.

5. The method for processing signals of multiple-length flying shears according to claim 1, wherein the step 4 is specifically as follows:

step 4.1, the steel head loops through before cutting the hot position of examining, cuts the back hot position of examining, all detects there is the steel signal, at this moment, records to cut the steel signal that has of back hot position of examining, according to this duration that has the steel signal, and the controller sends out shear signal, begins to cut the steel spare, has steel signal duration to be:

wherein S is the duration of the steel signal, and V is the linear velocity. (ii) a

Step 4.2, the steel part continuously advances, shearing is carried out according to the set multiple length, and the shearing time between the sheared multiple length is as follows:

wherein, T_nFor shear time, L_nIs the cut length.

6. The method for processing signals of multiple-length flying shears according to claim 1, wherein the step 5 is specifically as follows:

when the steel tail arrives at the hot inspection position before shearing, the controller starts to detect signals, after the signals for detecting the leaving of the steel tail last 200ms, the controller judges that the signals are effective as steel-free signals, the reset processing is carried out, the steel piece continuously advances, when the steel tail arrives at the hot inspection position after shearing, the signals are detected by the controller, after the signals for detecting the leaving of the steel tail last 20ms, the controller judges that the signals are effective as steel-free signals, the reset processing is carried out, the steel head sequentially passes through the hot inspection position before shearing and the hot inspection position after shearing, the steel-free signals are all detected, and the completion of the shearing of the steel piece is confirmed.

Technical Field

The invention belongs to the technical field of process shearing, and relates to a signal processing method of a multiple-length flying shear.

Background

A shearing machine for transversely shearing a rolled piece in operation is called as a flying shear, the flying shear is an important component of a cold continuous rolling mill, the flying shear cuts continuously rolled endless strip steel on line according to the coil diameter under the condition of no shutdown according to the instruction of a machine set so as to meet the requirements of the next procedure of a production line on the cutting of a steel coil, in order to meet the requirements of higher operating efficiency and product quality, the flying shear is adopted to shear the strip steel, the production continuity of the cold continuous rolling production line is more and more important, the double-length flying shear is used for carrying out dynamic fixed-length shearing segmentation on finished steel products, the reliability of a detection signal is a key measure for ensuring the reliable shearing of the flying shear, the double-length flying shear is required to ensure good shearing quality, the fixed-length is accurate, the cut surface is neat and the wider fixed-length adjusting range, and a certain shearing speed is required, and the flying shear is an important device for shearing and processing metal blanks by a steel, the performance of the rolling mill is good and bad, and the production efficiency of the rolling production line is directly influenced.

Disclosure of Invention

The invention aims to provide a method for processing signals of a multiple-length flying shear, which solves the problems of large disturbance and easy interruption of received signals during shearing in the prior art.

The technical scheme adopted by the invention is that a method for processing signals of a multiple-length flying shear specifically comprises the following steps:

step 1, determining a thermal detection position before shearing according to the positions of two shearing edges;

step 2, determining the thermal detection position after shearing according to the thermal detection position before shearing obtained in the step 1

Step 3, processing signals according to signals detected when the steel head passes through a pre-shearing thermal detection position and a post-shearing thermal detection position;

step 4, generating a shearing permission signal according to the processed signal, and shearing the steel part;

and 5, processing signals according to the signals detected when the steel tail passes through the pre-shearing thermal detection position and the post-shearing thermal detection position.

In step 1, according to the rotating perimeter of any shear blade, the position of thermal detection before shearing is set to be away from the shear bladeAnd D is the equivalent diameter of the rotary cutting edge of the flying shear.

In the step 2, according to the thermal detection position before shearing obtained in the step 1, the thermal detection position after shearing is as follows,

wherein L is the minimum length of the multiple.

The step 3 is as follows:

3.1, starting to detect a signal through a controller when the steel head of the steel part reaches a hot detection position before shearing, judging the signal to be effective by the controller after the signal lasts for 200ms, and setting the signal as a steel signal;

step 3.2, if the signal duration is less than 200ms during signal detection, filtering the signal as a disturbance signal;

and 3.2, the steel head passes through the pre-shearing thermal detection position and reaches the post-shearing thermal detection position, the signal is detected through the controller, the controller judges that the signal is effective after the signal lasts for 20ms, the signal is used as a steel signal and is set, and if the signal duration is less than 20ms, the signal is reset.

The step 4 is as follows:

step 4.1, the steel head loops through before cutting the hot position of examining, cuts the back hot position of examining, all detects there is the steel signal, at this moment, records to cut the steel signal that has of back hot position of examining, according to this duration that has the steel signal, and the controller sends out shear signal, begins to cut the steel spare, has steel signal duration to be:

wherein S is the duration of the steel signal, and V is the linear velocity. (ii) a

Step 4.2, the steel part continuously advances, shearing is carried out according to the set multiple length, and the shearing time between the sheared multiple length is as follows:

wherein, T_nFor shear time, L_nIs the cut length.

The step 5 is as follows:

when the steel tail arrives at the hot inspection position before shearing, the controller starts to detect signals, after the signals for detecting the leaving of the steel tail last 200ms, the controller judges that the signals are effective as steel-free signals, the reset processing is carried out, the steel piece continuously advances, when the steel tail arrives at the hot inspection position after shearing, the signals are detected by the controller, after the signals for detecting the leaving of the steel tail last 20ms, the controller judges that the signals are effective as steel-free signals, the reset processing is carried out, the steel head sequentially passes through the hot inspection position before shearing and the hot inspection position after shearing, the steel-free signals are all detected, and the completion of the shearing of the steel piece is confirmed.

The invention has the advantages that under the complex condition of high-speed rolling, the signals are filtered and delayed, reliable signals which are consistent with the scene are provided for the controller, the steel pieces are controlled to be cut, the system errors are reduced by processing the signals, the cutting precision is improved, the end cutting phenomenon of the two steel pieces can be prevented, the fast-speed rolling is satisfied, and the misoperation is avoided.

Drawings

FIG. 1 is a schematic diagram of a signal processing method of a multiple-length flying shear of the present invention;

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

A method for processing signals of a multiple-length flying shear is specifically carried out according to the following steps as shown in figure 1:

step 1, determining a thermal detection position before shearing according to the positions of two shearing edges;

step 2, determining the thermal detection position after shearing according to the thermal detection position before shearing obtained in the step 1

Step 3, processing signals according to signals detected when the steel head passes through a pre-shearing thermal detection position and a post-shearing thermal detection position;

step 4, generating a shearing permission signal according to the processed signal, and shearing the steel part;

and 5, processing signals according to the signals detected when the steel tail passes through the pre-shearing thermal detection position and the post-shearing thermal detection position.

In step 1, according to the rotating perimeter of any shear blade, the position of thermal detection before shearing is set to be away from the shear blade

And D is the equivalent diameter of the rotary cutting edge of the flying shear.

In the step 2, according to the thermal detection position before shearing obtained in the step 1, the thermal detection position after shearing is as follows,

wherein L is the minimum length of the multiple.

The step 3 is as follows:

3.1, starting to detect a signal through a controller when the steel head of the steel part reaches a hot detection position before shearing, judging the signal to be effective by the controller after the signal lasts for 200ms, and setting the signal as a steel signal;

step 3.2, if the signal duration is less than 200ms during signal detection, filtering the signal as a disturbance signal;

and 3.2, the steel head passes through the pre-shearing thermal detection position and reaches the post-shearing thermal detection position, the signal is detected through the controller, the controller judges that the signal is effective after the signal lasts for 20ms, the signal is used as a steel signal and is set, and if the signal duration is less than 20ms, the signal is reset.

The step 4 is as follows:

step 4.1, the steel head loops through before cutting the hot position of examining, cuts the back hot position of examining, all detects there is the steel signal, at this moment, records to cut the steel signal that has of back hot position of examining, according to this duration that has the steel signal, and the controller sends out shear signal, begins to cut the steel spare, has steel signal duration to be:

wherein S is the duration of the steel signal, and V is the linear velocity. (ii) a

Step 4.2, the steel part continuously advances, shearing is carried out according to the set multiple length, and the shearing time between the sheared multiple length is as follows:

wherein, T_nFor shear time, L_nIs the cut length.

The step 5 is as follows:

when the steel tail arrives at the hot inspection position before shearing, the controller starts to detect signals, after the signals for detecting the leaving of the steel tail last 200ms, the controller judges that the signals are effective as steel-free signals, the reset processing is carried out, the steel piece continuously advances, when the steel tail arrives at the hot inspection position after shearing, the signals are detected by the controller, after the signals for detecting the leaving of the steel tail last 20ms, the controller judges that the signals are effective as steel-free signals, the reset processing is carried out, the steel head sequentially passes through the hot inspection position before shearing and the hot inspection position after shearing, the steel-free signals are all detected, and the completion of the shearing of the steel piece is confirmed.

According to the method for processing the signals of the multiple-length flying shear, the signals are filtered and delayed, reliable signals which are consistent with the scene are provided for a controller, steel shearing is controlled to be completed, after one steel shearing is completed, resetting processing is performed through the obtained steel-free signals, the same operation is performed on the next steel, signal disturbance is reduced through processing the signals, signal interruption is avoided, system errors are reduced, and shearing precision is improved.