CN104259345A - 一种钢筋调直机智能保护停机方法 - Google Patents

一种钢筋调直机智能保护停机方法 Download PDF

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CN104259345A
CN104259345A CN201410378996.XA CN201410378996A CN104259345A CN 104259345 A CN104259345 A CN 104259345A CN 201410378996 A CN201410378996 A CN 201410378996A CN 104259345 A CN104259345 A CN 104259345A
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王家琦
喻全春
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LUOYANG TIHOT RAILWAY MACHINERY MANUFACTURING Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21FWORKING OR PROCESSING OF METAL WIRE
    • B21F1/00Bending wire other than coiling; Straightening wire
    • B21F1/02Straightening
    • B21F1/026Straightening and cutting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21FWORKING OR PROCESSING OF METAL WIRE
    • B21F11/00Cutting wire

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Abstract

一种钢筋调直机智能保护停机方法,系统实时把当前需要剪切的钢筋长度与调直机运转速度输入给PLC,PLC根据输入的数据计算出调直每根需要剪切的钢筋所需要的理论时间T0;将计算出的理论时间T0加0.3s后作为原始时间设定值T1;设备运转时,系统也会立即实时记录设备运行时间,在每次完成剪切后,清零现有运行时间,重新开始计时,当设备运行时间超过设定值T1,主机停机;若剪切根数C≤2,且剪切时的系统内部定时器Tp>T1+0.5,主机停机,在主机智能停止后的0.5秒内,剪切机构正常运转。本发明通过采用智能保护停机,系统能够自动判断出紧急情况,自动停止设备,使人员安全得到保障,损坏设备的几率降低。

Description

一种钢筋调直机智能保护停机方法
技术领域
本发明涉及钢筋调直机,具体的说是一种调直机智能保护停机方法。
背景技术
公知的,在建筑工地浇注钢筋混凝土时,钢筋作为必要结构件,用量非常大;再加上传统的调直方法需要耗费大量的人工,随着人工的增长,越来越多的企业开始使用钢筋调直机。钢筋调直机由电动机通过皮带传动增速,使调直筒高速旋转,穿过调直筒的钢筋被调直,并由调直模清除钢筋表面的锈皮;由电动机通过另一对减速皮带传动和齿轮减速箱,一方面驱动两个传送压辊,牵引钢筋向前运动,另一方面带动曲柄轮,使锤头上下运动。当钢筋调直到预定长度,锤头锤击上刀架,将钢筋切断,切断的钢筋落入受料架时,由于弹簧作用,刀台又回到原位,完成一个循环。
随着社会的发展,市场上的调直机调直速度越来越快,而电气控制基本上都延用传统的人工操作,保护措施不完善,设备长期运转时,容易发生钢筋从卸料舱门穿出,或者钢筋剪切后掉不下来的情况,人工操作停止设备具有很大的滞后性,还存在一些误操作可能,容易发生人员安全事故和存在造成设备损坏的隐患。
发明内容
本发明的目的是克服现有技术中人工操作调直机具有滞后性,存在安全隐患的问题,提供一种钢筋调直机智能保护停机方法,旨在当调直机出现问题时,系统能够智能停机,更好的保护设备和人员安全。
本发明为实现上述目的所采用的技术方案为:
一种钢筋调直机智能保护停机方法,包括以下步骤:步骤一、系统实时与触摸屏通讯把当前需要剪切的钢筋长度与现有调直机运转速度输入给可编程控制器,可编程控制器根据输入的数据计算出调直每根需要剪切的钢筋所需要的理论时间T0,单位为s;
步骤二、将步骤一计算出的理论时间T0加0.3s后作为原始时间设定值T1,即T1=T0+0.3,单位为s;
步骤三、系统启动时,系统内部定时器Tp、剪切信号接通时间Tj、剪切根数C开始从零计,且每个剪切周期内,系统判断剪切的次数,并使系统内部定时器Tp与步骤二设定的原始时间设定值T1相比较,每个剪切周期后,系统自动把Tp清零、Tj清零以及剪切根数C加1处理,其中,Tp和Tj的单位为s;
若C≤2,且剪切时的系统内部定时器Tp>T1+0.5,系统主电机回路超时报警停机;若C>2,且剪切时的系统内部定时器Tp>T1,系统主电机回路超时报警停机;
步骤四、若系统主电机停机,剪切电机延迟0.5s后停机;否则,系统正常运行。
本发明的步骤三中,同时存在因剪切信号异常的报警程序:系统运行过程中,若每个剪切周期中Tj>1,系统剪切电机异常报警停机。
本发明保护停机的原理为:可编程控制器根据触摸屏输入需要剪切的钢筋长度和现有设备运转速度计算出每调直一根此长度钢筋所需要时间的理论值,然后在此时间上加0.3s后当原始设定值。当调直机运转时,系统会判断目前是否处在运转后前两次剪切内,如果是,设定值为原始设定值再加0.5s,如果不是则设定值为原始设定值。设备运转时,系统也会立即实时记录设备运行时间,在每次完成剪切后,清零现有运行时间,重新开始计时,当设备运行时间超过设定值,主机立即智能停止。设备在剪切时,剪切信号接通并开始计时,当信号断开后,清零当前计时时间,等待下一次剪切信号接通时,再次从零开始计时,系统实时把剪切信号接通时间与一秒进行比较,大于一秒,主机立即停止。
在主机智能停止后的0.5s内,剪切机构正常运转,在此时间内,剪切信号接通,继续实现剪切、卸料等动作。
有益效果:本发明中的可编程控制程序在系统运行时,会立即实时记录其运行时间,在每次完成剪切后,清零现有运行时间,重新开始计时,当设备运行时间超过设定值,主机立即智能停止,而剪切回路延迟停机,防止钢筋在停止后由于惯性继续前进一段碰到剪切信号后把钢筋顶弯;本发明通过采用智能保护停机系统,能够自动判断出紧急情况,自动停止设备,使人员安全得到保障,降低设备损坏的几率。
附图说明
图1是系统的当前调直速度和剪切长度输入给可编程控制器,转换并计算出设定时间T1
图2是系统在每个剪切周期内判断一次定时器时间与设定时间比较过程。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
一种钢筋调直机智能保护停机方法,包括以下步骤:步骤一、系统实时与触摸屏通讯把当前需要剪切的钢筋长度与现有调直机运转速度输入给可编程控制器PLC,可编程控制器PLC根据输入的数据计算出调直每根需要剪切的钢筋所需要的理论时间T0,单位为s;
步骤二、将步骤一计算出的理论时间T0加0.3s后作为原始时间设定值T1,即T1=T0+0.3,单位为s;
步骤三、系统启动时,系统内部定时器Tp、剪切信号接通时间Tj、剪切根数C开始从零计,且每个剪切周期内,系统判断剪切的次数,并使系统内部定时器Tp与步骤二设定的原始时间设定值T1相比较,每个剪切周期后,系统自动把Tp清零、Tj清零以及剪切根数C加1处理,其中,Tp和Tj的单位为s;
(1)安全剪切超时报警:
若C≤2,且剪切时的系统内部定时器Tp>T1+0.5,系统主电机回路超时报警停机;若C>2,且剪切时的系统内部定时器Tp>T1,系统主电机回路超时报警停机;
(2)自动剪切信号异常报警:
系统运行过程中,若每个剪切周期中Tj>1,系统剪切电机异常报警停机;
步骤四、若系统主电机停机,剪切电机延迟0.5s后停机;否则,系统正常运行。
结合图1所示,系统实时把触摸屏内的调直速度和当前调直钢筋长度L传入到可编程控制器中,可编程控制器先把传入的调直速度V由整数转换成实数,然后再把此数值单位由m/min转换成m/s。再用当前钢筋调直长度除以转换后的调直速度,得到时间T0。最后用T0加上0.3s作为系统原始的安全剪切时间设定值T1,公式为T1=L∕V+0.3,单位为s。
每次设备启动时,系统内部定时器开始从零计时Tp、剪切信号接通时间Tj、剪切根数C,每次剪切完成时系统自动把时间Tp清零、Tj清零、剪切根数C加1处理、如图2所示,在C小于2时,系统会在每个扫描周期内判断一次“Tp>T1+0.5”,如果大于,则系统立即停止主电机。在C大于2时,系统会在每个扫描周期机内判断一次“Tp>T1”如果大于,也立即停止主电机。上述两个停止时都会在屏幕上自动跳出“安全剪切超时报警”;系统在设备运行时,每个扫描周期内判断一次”Tj>100”(100换算成时间单位秒则为1秒),当大于时也会立即停止主机。并且在屏幕上显示“自动剪切信号异常报警”。
当主电机智能停止时,系统在停止的后0.5s内让剪切电机处在正常运行状态,此时有剪切信号接通时,继续剪切,防止钢筋在停止后由于惯性继续前进一段碰到剪切信号后把钢筋顶弯。

Claims (2)

1.一种钢筋调直机智能保护停机方法,其特征在于,包括以下步骤:
步骤一、系统实时与触摸屏通讯把当前需要剪切的钢筋长度与现有调直机运转速度输入给可编程控制器,可编程控制器根据输入的数据计算出调直每根需要剪切的钢筋所需要的理论时间T0,单位为s;
步骤二、将步骤一计算出的理论时间T0加0.3s后作为原始时间设定值T1,即T1=T0+0.3,单位为s;
步骤三、系统启动时,系统内部定时器Tp、剪切信号接通时间Tj、剪切根数C开始从零计,且每个剪切周期内,系统判断剪切的次数,并使系统内部定时器Tp与步骤二设定的原始时间设定值T1相比较,每个剪切周期后,系统自动把Tp清零、Tj清零以及剪切根数C加1处理,其中,Tp和Tj的单位为s;
若C≤2,且剪切时的系统内部定时器Tp>T1+0.5,系统主电机回路超时报警停机;若C>2,且剪切时的系统内部定时器Tp>T1,系统主电机回路超时报警停机;
步骤四、若系统主电机停机,剪切电机延迟0.5s后停机;否则,系统正常运行。
2.根据权利要求1所述的一种钢筋调直机智能保护停机方法,其特征在于:步骤三中:系统运行过程中,若每个剪切周期中Tj>1,系统剪切电机异常报警停机。
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CN111715820A (zh) * 2020-06-30 2020-09-29 重庆黄朝物资有限公司 用于钢筋冷轧的控制系统

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