阅读说明：本技术 一种用于高速线材轧机间的张力检测及控制方法 (Tension detection and control method for high-speed wire rod rolling mill ) 是由 王保勤 姜旭斌 张智应 魏建宏 王朝辉 郭建平 张亚飞 郝虎光 朱立光 任文明 于 2020-07-02 设计创作，主要内容包括：本发明公开了一种用于高速线材轧机间的张力检测及控制方法,其特征在于,包括以下步骤：S1、在第一轧机和第二轧机的转辊处安装第一激光转速传感器和第二激光转速传感器；S2、通过第一激光转速传感器和第二激光转速传感器监测转辊的转速,并通过张紧力测试仪检测线材的张力；S3、记录转辊的转速差与线材的张力的关系并绘制函数关系图；S4、判断线材的张力时,根据第一激光转速传感器和第二激光转速传感器读数之差,查找函数关系图确认线材的张力；S5、调整线材张力时,使用者调整第一轧机和第二轧机的转辊的转速差,进而控制线材的张力。本发明依靠激光测速仪检测精轧机与迷你轧机之间速度状态,进而测算出精轧机与迷你轧机之间的张力大小。(The invention discloses a tension detection and control method for a high-speed wire rod rolling mill, which is characterized by comprising the following steps of: s1, mounting a first laser rotation speed sensor and a second laser rotation speed sensor at the rotating rollers of the first rolling mill and the second rolling mill; s2, monitoring the rotating speed of the rotating roller through the first laser rotating speed sensor and the second laser rotating speed sensor, and detecting the tension of the wire through the tension tester; s3, recording the relationship between the rotating speed difference of the rotating roller and the tension of the wire and drawing a functional relationship graph; s4, when the tension of the wire is judged, searching a functional relation graph according to the reading difference between the first laser rotation speed sensor and the second laser rotation speed sensor to confirm the tension of the wire; and S5, when the tension of the wire rod is adjusted, the user adjusts the rotating speed difference of the rotating rollers of the first rolling mill and the second rolling mill, and further controls the tension of the wire rod. The invention detects the speed state between the finishing mill and the mini rolling mill by means of the laser velocimeter, and further measures and calculates the tension between the finishing mill and the mini rolling mill.)

1. A tension detection and control method for a high-speed wire rod rolling mill is characterized by comprising the following steps:

s1, mounting a first laser rotation speed sensor at the roller of the first rolling mill, and mounting a second laser rotation speed sensor at the roller of the second rolling mill;

s2, monitoring the rotating speed of the rotating rollers of the first rolling mill and the second rolling mill through a first laser rotating speed sensor and a second laser rotating speed sensor, and detecting the tension of the wire rod between the first rolling mill and the second rolling mill through a tension tester;

s3, recording the relation between the rotating speed difference of the rotating rollers of the first rolling mill and the second rolling mill and the tension of the wire rod between the first rolling mill and the second rolling mill and drawing a functional relation graph;

s4, when the tension of the wire is judged, a user can search a functional relation graph according to the difference of the readings of the first laser rotating speed sensor and the second laser rotating speed sensor to quickly confirm the tension of the wire;

and S5, when the tension of the wire rod is adjusted, a user can adjust the rotating speed difference of the rotating rollers of the first rolling mill and the second rolling mill according to the tension required during the production of the wire rod, and further control the tension of the wire rod between the first rolling mill and the second rolling mill.

2. The method for detecting and controlling tension between high-speed wire rod rolling mills according to claim 1, wherein: when the tension of the wire rod is adjusted in S5, the rotational speed of the rolls of the first rolling mill or the second rolling mill can be independently adjusted, and the first rolling mill is located in front of the second rolling mill.

3. The method for detecting and controlling tension between high-speed wire rod rolling mills as claimed in claim 2, wherein: when the tension is small, the user can increase the rotational speed of the rolls of the second rolling mill, or decrease the rotational speed of the rolls of the first rolling mill.

4. The method for detecting and controlling tension between high-speed wire rod rolling mills as claimed in claim 2, wherein: when the tension is greater, the user can increase the rotational speed of the rolls of the first rolling mill or decrease the rotational speed of the rolls of the second rolling mill.

5. The method for detecting and controlling tension between high-speed wire rod rolling mills according to claim 1, wherein: the tension detector in S2 is a hand-held sonic tension detector.

Technical Field

The invention relates to the technical field of wire tension detection and control, in particular to a tension detection and control method for a high-speed wire rolling mill.

Background

Wire rod mills are mills that are specially used for rolling wire rods (i.e. wire rods). The wire rod is the product with the smallest section size in the section bar, the finished product is rolled from the blank, the total elongation coefficient is large, and the rolled piece is usually rolled on each rolling mill only once, so the wire rod rolling mill is the rolling mill with the largest number of racks and the finest division in the hot rolling section bar. At present, modern continuous wire rod rolling mills generally comprise 21-28 rolling mills, and are divided into a rough rolling mill group, a medium rolling mill group and a finishing rolling mill group, wherein the medium rolling mill group is sometimes divided into a first medium rolling mill group and a second medium rolling mill group. The structure and the arrangement mode of a wire rolling mill are developed towards the directions of high speed, continuity, no torsion, single line, combined structure, mechanization and automation, the tension of the rolling mill is detected by adopting a tension current control method in the prior art, namely, the tension change of the rolling mill is directly detected through the change of the motor current, the method has low precision, can not meet the requirement of the rolling material precision, can not realize that the original steel drawing rolling state is changed into a micro-tension rolling state, the head and tail dimension error of a steel bar is larger, the length of the unqualified head and tail dimension part is longer, the waste cutting amount is larger, the yield is lower, and the production cost is higher.

Disclosure of Invention

The invention aims to provide a tension detection and control method for a high-speed wire rod rolling mill, which has the advantages of detecting the speed state between a finishing mill and a mini rolling mill by a laser velocimeter, further measuring and calculating the tension between the finishing mill and the mini rolling mill, reconstructing the speed-up and speed-down regulation relation between frames, and solving the problems that the tension change of the rolling mill is directly measured by the change of motor current, the method has low precision, can not meet the requirement of rolling material precision, can not realize the original drawing and rolling state to be changed into a micro-tension rolling state, the head and tail dimension error of a steel bar is larger, the length of a head and tail dimension unqualified part is longer, the waste cutting amount is larger, the yield is lower, and the production cost is higher.

In order to achieve the purpose, the invention provides the following technical scheme: a tension detection and control method for a high-speed wire rod rolling mill is characterized by comprising the following steps:

s1, mounting a first laser rotation speed sensor at the roller of the first rolling mill, and mounting a second laser rotation speed sensor at the roller of the second rolling mill;

s2, monitoring the rotating speed of the rotating rollers of the first rolling mill and the second rolling mill through a first laser rotating speed sensor and a second laser rotating speed sensor, and detecting the tension of the wire rod between the first rolling mill and the second rolling mill through a tension tester;

s3, recording the relation between the rotating speed difference of the rotating rollers of the first rolling mill and the second rolling mill and the tension of the wire rod between the first rolling mill and the second rolling mill and drawing a functional relation graph;

s4, when the tension of the wire is judged, a user can search a functional relation graph according to the difference of the readings of the first laser rotating speed sensor and the second laser rotating speed sensor to quickly confirm the tension of the wire;

and S5, when the tension of the wire rod is adjusted, a user can adjust the rotating speed difference of the rotating rollers of the first rolling mill and the second rolling mill according to the tension required during the production of the wire rod, and further control the tension of the wire rod between the first rolling mill and the second rolling mill.

Preferably, when the wire tension adjustment is performed in S5, the rotational speed of the rolls of the first rolling mill or the second rolling mill may be individually adjusted, and the first rolling mill is located before the second rolling mill.

Preferably, when the tension is small, the user can increase the rotational speed of the rolls of the second rolling mill, or decrease the rotational speed of the rolls of the first rolling mill.

Preferably, when the tension is greater, the user increases the rotational speed of the rolls of the first rolling mill, or decreases the rotational speed of the rolls of the second rolling mill.

Preferably, the tension monitor of S2 is a hand-held sonic tension monitor.

Compared with the prior art, the invention has the beneficial effects that: the speed state between the first rolling mill and the second rolling mill is detected by means of the first laser rotating speed sensor and the second laser rotating speed sensor, the tension between the first rolling mill and the second rolling mill is calculated, the speed increasing and reducing adjusting relation between the frames is reconstructed, the original steel drawing rolling state is changed into a micro-tension rolling state, the head and tail size difference of the steel bar is effectively reduced, the length of the unqualified head and tail size part is shortened, the waste cutting amount is reduced, and the yield is greatly improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provided by the invention comprises the following steps: a tension detection and control method for a high-speed wire rod rolling mill is characterized by comprising the following steps:

s1, mounting a first laser rotation speed sensor at the roller of the first rolling mill, and mounting a second laser rotation speed sensor at the roller of the second rolling mill;

s2, monitoring the rotating speeds of the rotating rollers of the first rolling mill and the second rolling mill through a first laser rotating speed sensor and a second laser rotating speed sensor, and detecting the tension of the wire between the first rolling mill and the second rolling mill through a tension tester, wherein the tension detector in S2 is a handheld sonic wave type tension detector;

s3, recording the relationship between the rotation speed difference of the rotating rollers of the first rolling mill and the second rolling mill and the tension of the wire between the first rolling mill and the second rolling mill, drawing a functional relationship diagram, detecting the speed state between the first rolling mill and the second rolling mill by means of the first laser rotation speed sensor and the second laser rotation speed sensor, further measuring and calculating the tension between the first rolling mill and the second rolling mill, reconstructing the regulation relationship between the speed increasing and the speed reducing between frames, realizing that the original steel drawing rolling state is changed into a micro-tension rolling state, effectively reducing the head and tail size difference of the steel bar, shortening the length of the unqualified head and tail size part, reducing the waste cutting amount and greatly improving the yield;

s4, when the tension of the wire is judged, a user can search a functional relation graph according to the difference of the readings of the first laser rotating speed sensor and the second laser rotating speed sensor to quickly confirm the tension of the wire;

s5, when adjusting the tension of the wire rod, the user can adjust the rotating speed difference of the rotating rollers of the first rolling mill and the second rolling mill according to the tension needed by the wire rod production, and further control the tension of the wire rod between the first rolling mill and the second rolling mill, when adjusting the tension of the wire rod in S5, the rotating speed of the rotating rollers of the first rolling mill or the second rolling mill can be independently adjusted, the first rolling mill is positioned in front of the second rolling mill, when the tension is smaller, the user can increase the rotating speed of the rotating rollers of the second rolling mill or reduce the rotating speed of the rotating rollers of the first rolling mill, when the tension is larger, the user can increase the rotating speed of the rotating rollers of the first rolling mill or reduce the rotating speed of the rotating.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.