Electromagnetic chuck control method

Abstract

The invention relates to an electromagnetic chuck control method, and belongs to the technical field of electromagnetic chuck control equipment in the metallurgical industry. According to the technical scheme, a programmable controller firstly collects signals of an operation button of an operation room, an incoming line voltage, a material suction and discharge voltage, a material suction and discharge current, a charging voltage, a charging current, a battery of a battery monitoring module, a first cable current, a second cable current and a discharge current; then the programmable controller outputs control signals of the material suction rectification module, the material discharge rectification module, the charging rectification module and the magnetic protection contactor; and finally, the touch screen and the programmable controller perform data interaction. The automatic feeding device has the beneficial effects that through logic judgment of the programmable controller, the safety of the electromagnetic chuck during material suction is improved; the battery balance charging device balances the charging voltage of each battery during charging, detects the charging voltage and the charging current, and prolongs the service life of the battery.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of electromagnetic chuck control method, belongs to metallurgical industry electromagnetic chuck control equipment technical field. BACKGROUND

[0002] Electromagnetic chuck is a kind of electromagnetic clamp, it is fixed by the suction force generated by the suction body of electromagnetic coil energization.Electromagnetic chuck is widely used in metallurgical industry, for the hoisting of billet.

[0003] Electromagnetic chuck has the following problems in the process of suction: one is that electromagnetic chuck gradually changes from cold state to hot state, the resistance of electromagnetic chuck increases, and the current will decrease when the voltage is constant, the magnetic intensity reduces, and the magnetic force reduces to cause the occurrence of steel drop accident;Two is that when power off, the chuck will lose power demagnetization, leading to the occurrence of steel drop accident;Three is that the magnetic battery is in the state of no monitoring management for a long time, appears battery overcharge drum and other phenomena, influence battery service life. SUMMARY

[0004] The purpose of the present application is to provide a kind of electromagnetic chuck control method, can improve the safety of electromagnetic chuck suction, avoid the occurrence of steel drop accident, and the battery charging has controllability, prolongs battery service life, solves the problems in the background art.

[0005] The technical scheme of the present application is: A kind of electromagnetic chuck control method, adopts touch screen, operating room operating button, programmable controller, incoming line voltage detection, incoming line transformer, discharge rectifier module, suction rectifier module, charging rectifier module, suction discharge voltage detection, suction discharge current detection, charging voltage detection, charging current detection, battery balancing charging device, battery pack, battery monitoring module, cable current detection one, cable current detection two, electromagnetic chuck, magnetic contactor and discharge current detection composition electromagnetic chuck control system, includes the following steps: first programmable controller collects operating room operating button, incoming line voltage, suction discharge voltage, suction discharge current, charging voltage, charging current, battery monitoring module battery, cable current one, cable current two and discharge current signal;Then programmable controller outputs the control signal of suction rectifier module, discharge rectifier module, charging rectifier module and magnetic contactor;Finally, touch screen and programmable controller carry out data interaction.

[0006] Specifically includes the following operations: Electromagnetic chuck suction material: the operating chamber operating button sends the operating chamber suction material signal, the programmable controller judges whether the incoming line voltage is normal, when the incoming line voltage is abnormal, the touch screen displays the fault and the sound and light alarm; when the incoming line voltage is normal, the PID constant current operation is carried out according to the suction and discharge current, then the suction material rectifier module output is controlled, the electromagnetic chuck is energized and excited, and the incoming line voltage, the suction and discharge voltage and the suction and discharge current are cyclically judged, when the abnormality occurs, the magnetic contactor is attracted; Electromagnetic chuck discharge: when the electromagnetic chuck is in the suction material state, the operating chamber operating button sends the operating chamber discharge signal and then sends the operating chamber discharge confirmation signal, when the incoming line voltage is normal, the suction material rectifier module output is stopped, then the discharge rectifier module output is controlled, the electromagnetic chuck is reversely energized, and the electromagnetic chuck is quickly demagnetized; when the incoming line voltage is abnormal, the magnetic contactor is disconnected. Battery charging: when the incoming line voltage is normal and the battery is not full, the battery charging is started; when the incoming line voltage is abnormal, the battery charging is stopped.

[0007] When the battery is charging, the battery balancing charging device automatically balances the charging voltage of each battery.

[0008] The first stage of the battery charging is constant current charging, when the total voltage of the battery pack reaches the limit value, it is changed to constant voltage charging; when the charging current is less than the limit value in the constant voltage charging state, it is changed to floating charging, and the battery pack is fully charged after a certain time of floating charging.

[0009] When the electromagnetic chuck is in the suction material state, the cable current one and the cable current two data are monitored in real time, and the state of the cable core current ratio is calculated.

[0010] The present application has the advantages that the safety of the electromagnetic chuck suction material can be improved, the steel dropping accident can be avoided, the battery charging can be controlled, and the service life of the battery can be prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the overall schematic diagram of the present application; Figure 2 It is the suction material logic judgment schematic diagram of the present application; Figure 3 It is the discharge logic judgment schematic diagram of the present application; Figure 4 It is the charging logic judgment schematic diagram of the present application; Figure 5 It is the cable logic judgment schematic diagram of the present application; DETAILED DESCRIPTION

[0012] The present application will be further described by examples in combination with the drawings.

[0013] Refer to the drawings Figure 1A method for controlling an electromagnetic chuck, which uses a touch screen, an operating room operating button, a programmable controller, incoming line voltage detection, an incoming line transformer, a material feeding rectification module, a material feeding rectification module, a charging rectification module, material feeding and discharging voltage detection, material feeding and discharging current detection, charging voltage detection, charging current detection, a battery balancing charging device, a battery pack, a battery monitoring module, cable current detection one, cable current detection two, an electromagnetic chuck, a magnetic contactor, and discharge current detection, and is composed of an electromagnetic chuck control system, comprising the following steps: first, the programmable controller collects signals of the operating room operating button, the incoming line voltage, the material feeding and discharging voltage, the material feeding and discharging current, the charging voltage, the charging current, the battery monitoring module battery, the cable current one, the cable current two, and the discharge current; then the programmable controller outputs control signals of the material feeding rectification module, the material discharging rectification module, the charging rectification module, and the magnetic contactor; finally, the touch screen and the programmable controller interact with each other.

[0014] In this example, the electromagnetic chuck control method first collects signals such as incoming line voltage, material feeding and discharging voltage, material feeding and discharging current, cable current one, and cable current two, and then makes logical judgments through the programmable controller, thereby improving the safety of the electromagnetic chuck when feeding material. The battery balancing charging device balances the charging voltage of each battery during charging. The charging voltage and charging current detection make the charging controllable through the programmable controller, eliminate overcharging, and prolong the service life of the battery.

[0015] The material feeding logic is shown in Figure 2 The operating room operating button sends an operating room material feeding signal, the programmable controller judges whether the incoming line voltage is normal, and when the incoming line voltage is abnormal, the touch screen displays a fault and sounds an alarm; when the incoming line voltage is normal, the material feeding rectification module output is controlled after PID constant current operation according to the material feeding and discharging current, the electromagnetic chuck is energized and excited, and the incoming line voltage, the material feeding and discharging voltage, and the material feeding and discharging current are cyclically judged to be normal, and the magnetic contactor is attracted when an abnormality occurs. The material discharging logic is shown in Figure 3 When the electromagnetic chuck is in the material feeding state, the operating room operating button sends an operating room material discharging signal and then sends an operating room material discharging confirmation signal again, the incoming line voltage is normal, the material feeding rectification module output is stopped, then the material discharging rectification module output is controlled, the electromagnetic chuck is reversely energized, the electromagnetic chuck is quickly demagnetized, and the incoming line voltage is abnormal, and the magnetic contactor is broken.

[0016] The charging logic is shown in Figure 4As shown, the incoming line voltage is normal, the battery pack is not full, the starting battery is charged; the first stage of charging is constant current charging, when the total voltage of the battery pack reaches the limit, it is changed to constant voltage charging; in the constant voltage charging state, when the charging current is less than the limit, it is changed to floating charging, and after a certain time of floating charging, the battery pack is fully charged, at which time the battery charging is stopped. When the power supply is abnormal, the battery pack stops charging. When the battery is charging, the battery balancing charging device automatically balances the charging voltage of each battery.

[0017] The cable judgment logic is as shown in the figure Figure 5 As shown, the electromagnetic chuck is in the state of sucking material, real-time monitoring of cable current one and cable current two data, and calculating the state of cable core current ratio, when the current ratio is too large or too small, the touch screen displays that the cable is faulty, and at this time, sound and light alarm.

[0018] The programmable controller of the present application adjusts and controls the material suction rectifier module through PID algorithm by collecting the material suction and discharge current, realizes constant current control when sucking material, ensures the magnetic strength when sucking material, and avoids the difference in magnetic strength of the electromagnetic chuck in cold state and hot state; the programmable controller controls the material discharge rectifier module by collecting the material suction and discharge current and material suction and discharge voltage, outputs reverse current to the electromagnetic chuck, makes the hoisted object quickly demagnetize, and improves work efficiency; the programmable controller judges whether the mains and the material suction rectifier module are faulty through incoming line voltage and material suction and discharge voltage detection, so as to timely put into the magnetic contactor, avoid the hoisted object from falling in the hoisting process, and improve safety; the electromagnetic chuck cable is a four-core cable, two cores of which are positive, and two cores of which are negative, cable current detection one detects the current of one core of the two positive cores, and cable current detection two detects the current of one core of the two negative cores, the programmable controller judges whether the cable is normal through cable current one and cable current two, discovers the cable use problem in time, and improves safety; the battery monitoring module monitors the voltage and temperature of each battery, calculates the health status of the battery through the discharge current and the voltage of each battery; the programmable controller realizes constant current charging, constant voltage charging and floating charging management of the battery pack through charging voltage and charging current; the battery balancing charging device keeps the balance of the voltage of each battery when the battery pack is charging, prolongs the service life of the battery.

[0019] The present application collects incoming line voltage, material suction and discharge voltage, material suction and discharge current, cable current one and cable current two, improves the safety of the electromagnetic chuck when sucking material through programmable controller logic judgment. The battery balancing charging device balances the charging voltage of each battery when charging. The charging voltage and charging current are detected, the charging is controllable through the programmable controller, overcharging is prevented, and the service life of the battery is prolonged.

Claims

1. A method for controlling an electromagnetic chuck, characterized in that: The electromagnetic chuck control system, consisting of a touchscreen, control room buttons, a programmable logic controller (PLC), an input voltage detector, an input transformer, a discharge rectifier module, a suction rectifier module, a charging rectifier module, suction / discharge voltage detection, suction / discharge current detection, charging voltage detection, charging current detection, a battery balancing charging device, a battery pack, a battery monitoring module, cable current detection modules 1 and 2, an electromagnetic chuck, a magnetizing contactor, and a discharge current detector, comprises the following steps: First, the PLC acquires signals from the control room buttons, input voltage, suction / discharge voltage, suction / discharge current, charging voltage, charging current, the battery from the battery monitoring module, cable current 1, cable current 2, and discharge current; then, the PLC outputs control signals from the suction rectifier module, the discharge rectifier module, the charging rectifier module, and the magnetizing contactor; finally, the touchscreen interacts with the PLC.

2. The electromagnetic chuck control method according to claim 1, characterized in that: Specifically, it includes the following operations: Electromagnetic chuck material suction: The control room operation button sends a material suction signal to the control room. The programmable controller judges whether the input voltage is normal. When the input voltage is abnormal, the touch screen displays the fault and an audible and visual alarm is triggered. When the input voltage is normal, the control room performs PID constant current calculation based on the suction and discharge current and controls the output of the suction rectifier module to energize the electromagnetic chuck. At the same time, the control room cyclically judges whether the input voltage, suction and discharge voltage, and suction and discharge current are normal. When an abnormality occurs, the magnetic contactor is activated. Electromagnetic chuck unloading: When the electromagnetic chuck is in the suction state, the control room operation button sends a material unloading signal and then sends a material unloading confirmation signal. If the input voltage is normal, the output of the suction rectifier module is stopped, and then the output of the unloading rectifier module is controlled to reverse the power supply to the electromagnetic chuck, so that the electromagnetic chuck is quickly demagnetized; if the input voltage is abnormal, the magnetizing contactor is disconnected. Battery charging: When the incoming voltage is normal and the battery is not fully charged, start battery charging; when the incoming voltage is abnormal, stop battery charging.

3. The electromagnetic chuck control method according to claim 2, characterized in that: When the battery is charging, it passes through a battery balancing charging device, which automatically balances the charging voltage of each battery.

4. The electromagnetic chuck control method according to claim 3, characterized in that: The first stage of battery charging is constant current charging. When the total voltage of the battery pack reaches the limit, it switches to constant voltage charging. Under constant voltage charging, if the charging current is less than the limit, it switches to float charging. After a certain period of float charging, the battery pack is fully charged.

5. The electromagnetic chuck control method according to claim 2, characterized in that: When the electromagnetic chuck is in the material-feeding state, it monitors the cable current data 1 and cable current data 2 in real time and calculates the current ratio of the cable core.

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