Wire breaking safety control method of wire drawing equipment and wire drawing equipment

Abstract

The invention discloses a wire breaking safety control method of wire drawing equipment and the wire drawing equipment, and belongs to the technical field of production equipment.The wire drawing equipment comprises a pay-off machine, a wire drawing machine and a take-up machine, and the control end of the take-up machine is connected with a take-up frequency converter; the wire breakage safety control method comprises the steps that in the wire drawing and winding process, a winding frequency converter reads the current working frequency in real time and compares the current working frequency with the preset maximum working frequency; if the current working frequency is larger than or equal to the maximum working frequency, it is judged that a disconnection fault occurs, and the output terminal is made to send a disconnection fault signal to the fault input terminal; and after the take-up frequency converter reads the broken wire fault signal, the take-up frequency converter carries out emergency stop control on the take-up machine. According to the invention, disconnection abnormity can be detected in real time, alarm and shutdown can be made in real time and quickly, and the operation safety of equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of production equipment, and in particular to a wire breaking safety control method for wire drawing equipment and the wire drawing equipment. Background Art

[0002] The finished steel wire drawn by the wire drawing machine is generally rewound synchronously by a wire take-up machine, which is a constant tension rewinding method. That is, the finished steel wire passes through the tension arm guide wheel. The displacement sensor that detects the position of the tension arm is combined with the frequency converter that controls the rewinding of the wire take-up motor. The PID automatically adjusts the speed of the wire take-up motor to keep the tension arm at a constant target position for wire rewinding.

[0003] When the steel wire breaks, after the steel wire passes the tension arm at the breakpoint, the tension arm will fall down due to the loss of steel wire tension. At this time, the proximity switch used to detect the fall of the tension arm will sense the tension arm (in addition to using the proximity switch as a detection sensor, there are also methods such as collecting the tension arm displacement sensor value for comparison to detect wire breakage), and transmit the signal to the PLC that controls the operation of the machine tool, thereby triggering the fault condition in the PLC control program to stop the wire drawing machine, which has the effect of triggering the equipment to stop running after the steel wire breaks.

[0004] This traditional wire break detection method is affected by proximity switches, displacement sensors, PLC signal input anomalies, such as device damage, improper sensor installation, etc., and there is a phenomenon that the tension arm wire break signal cannot be correctly fed back to the PLC control program. After this phenomenon occurs, because the PLC control program does not receive the wire break signal, the equipment will not stop automatically and will remain in operation. Since the wire take-up machine is under constant tension control, the PID of the wire take-up inverter is still in automatic adjustment. The PID adjustment mechanism will think that the tension arm position is too low and needs to be accelerated. The wire take-up motor will be accelerated in a short time until the speed reaches the maximum and does not stop, causing the flying car to break the shaft. At this time, the I-shaped wheel on the wire take-up machine that has been wound up with wire may be thrown out of the equipment, posing a safety hazard to human and equipment safety. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a wire breaking safety control method for wire drawing equipment and a wire drawing equipment, so as to solve the technical problems that the wire breaking control of the existing wire drawing equipment is overly dependent on the signal detection and signal transmission of the sensor, is affected by the complex conditions of the production site, and has unstable reliability.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides a wire breakage safety control method for a wire drawing device, wherein the wire drawing device comprises a wire pay-off machine, a wire drawing machine and a wire take-up machine, wherein a control end of the wire take-up machine is connected to a wire take-up frequency converter; the wire breakage safety control method comprises: During the wire drawing and winding process, the winding frequency converter reads the current operating frequency in real time and compares the current operating frequency with the preset maximum operating frequency; If the current operating frequency is greater than or equal to the maximum operating frequency, it is determined that a line break fault occurs, and the output terminal sends a line break fault signal to the fault input terminal; After the wire-taking frequency converter reads the wire-breaking fault signal, the wire-taking frequency converter performs emergency stop control on the wire-taking machine.

[0007] Optionally, the maximum operating frequency is N times the maximum allowable frequency of the take-up frequency converter. <N<1。

[0008] Optionally, the control end of the wire drawing machine is connected to a PLC controller, and the output terminal of the wire taking-up inverter synchronously sends the wire break fault signal to the input terminal of the PLC controller. After the PLC controller reads the wire break fault signal, the PLC controller controls the wire drawing machine to stop.

[0009] Optionally, an alarm is connected to the PLC controller, and after the PLC controller reads the disconnection fault signal, the alarm issues a disconnection fault alarm.

[0010] Optionally, the wire drawing machine is provided with a tension arm, and the wire output by the wire drawing machine passes through the tension arm and enters the wire taking-up machine. The tension arm is provided with a position sensor for detecting the position signal of the tension arm during the wire drawing and taking-up process. The wire taking-up frequency converter receives the position signal and performs PID adjustment on the rotation speed of the wire taking-up machine.

[0011] Optionally, the output end of the wire unwinding machine, the input and output ends of the wire drawing machine, and the input end of the wire taking-up machine are all provided with guide wheels.

[0012] Optionally, the PLC controller is connected to a touch screen, and the touch screen is used for human-computer interaction.

[0013] In a second aspect, the present invention provides a wire drawing device, wherein the wire drawing device adopts the wire breaking safety control method as described above to perform wire breaking safety control.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a wire breaking safety control method for a wire drawing device and a wire drawing device. When a wire is broken, the wire take-up frequency converter can automatically and accurately identify the wire breaking fault according to its own working frequency, and immediately stop the machine in an emergency, without relying on the signal detection and signal transmission of the sensor, so as to ensure the stability and reliability of the safe operation of the equipment, and prevent the safety risks of the flying car breaking the shaft and the wire take-up I-shaped wheel throwing out of the equipment to people and equipment. At the same time, the present invention does not need to adjust the hardware structure of the existing wire drawing equipment, resulting in low cost and easy application and implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a structural schematic diagram of a wire drawing device provided by an embodiment of the present invention; Figure 2 is a signal connection diagram of a wire drawing device provided by an embodiment of the present invention; Figure 3 It is a flow chart of a wire breaking safety control method for a wire drawing device provided by an embodiment of the present invention; The markings in the figure are: 1. Wire-paying machine; 2. Wire drawing machine; 21. Tension arm; 22. Position sensor; 3. Wire-taking machine; 4. Guide wheel; 5. Wire-taking inverter; 6. PLC controller; 7. Alarm. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0017] Embodiment 1:

[0018] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a wire drawing device, including a wire pay-off machine 1, a wire drawing machine 2 and a wire take-up machine 3. The wire is sent out from the wire pay-off machine 1 and enters the wire take-up machine 3 after being processed by the wire drawing machine 2. A plurality of guide wheels 4 are also provided on the wire moving path for guidance. A tension arm 21 is provided on the wire drawing machine 2. The wire output by the wire drawing machine 2 enters the wire take-up machine 3 through the tension arm 21. A position sensor 22 is provided on the tension arm 21 for detecting the position signal of the tension arm 21 during the wire drawing and take-up process. The take-up inverter 5 receives the position signal and performs PID adjustment on the rotation speed of the wire take-up machine 3. The position sensor 22 includes but is not limited to a proximity switch and a displacement sensor.

[0019] The control end of the wire take-up machine 3 is connected to a wire take-up frequency converter 5 for controlling the wire take-up speed. Similarly, the control end of the wire pay-off machine 1 is also connected to a wire pay-off frequency converter for controlling the wire pay-off speed.

[0020] like Figure 3As shown in the figure, specifically in this embodiment, the wire break safety control method of the wire drawing device includes the following steps: Step S1: During the wire drawing and take-up process, the take-up frequency converter 5 reads the current operating frequency in real time and compares the current operating frequency with the preset maximum operating frequency.

[0021] The tension arm 21 at the constant tension take-up of the wire drawing machine 2 always operates at a constant target position. Usually, the speed of the take-up motor controlled by the PID regulation of the take-up frequency converter 5 operates between the minimum and maximum frequencies allowed by the take-up frequency converter 5 and does not exceed the allowed maximum frequency. Only after the wire breaks will it reach the allowed maximum frequency. Based on this mechanism, the maximum operating frequency is set to N times the maximum allowed frequency of the take-up frequency converter 5, where 0 < N < 1. The value of N can be flexibly adjusted according to actual needs.

[0022] Step S2: If the current operating frequency is greater than or equal to the maximum operating frequency, it is determined that a wire break fault has occurred, and the output terminal sends a wire break fault signal to the fault input terminal.

[0023] During the wire drawing and take-up process, when the wire breaks, the tension arm 21 will return to the upper position. At this time, under the action of the constant tension PID regulation, the take-up frequency converter 5 will reach the maximum frequency in a short time.

[0024] Step S3: After the take-up frequency converter 5 reads the wire break fault signal, the take-up frequency converter 5 performs an emergency stop control on the take-up machine 3.

[0025] After the emergency stop of the take-up machine 3, the emergency stop and fault alarm of the wire drawing machine 2 are further completed: The control end of the wire drawing machine 2 is connected to the PLC controller 6. The output terminal of the take-up frequency converter 5 synchronously sends the wire break fault signal to the input terminal of the PLC controller 6. After the PLC controller 6 reads the wire break fault signal, the PLC controller 6 performs a stop control on the wire drawing machine 2.

[0026] An alarm 7 is connected to the PLC controller 6. After the PLC controller 6 reads the wire break fault signal, the alarm 7 gives a wire break fault alarm.

[0027] Through the above wire break safety control method, when the wire breaks, the take-up frequency converter 5 can automatically and accurately identify the wire break fault according to its own operating frequency and immediately perform an emergency stop, without relying on the signal detection and signal transmission of the sensor, so as to ensure the stability and reliability of the safe operation of the equipment.

[0028] Embodiment 2:

[0029] The embodiment of the present invention provides a wire drawing device, and the wire drawing device uses the wire break safety control method provided in the above-mentioned Embodiment 1 for wire break safety control.

[0030] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0031] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0032] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0033] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A wire breaking safety control method for a wire drawing device, wherein the wire drawing device comprises a wire pay-off machine, a wire drawing machine and a wire take-up machine, characterized in that: The control end of the wire take-up machine is connected to a wire take-up frequency converter; the wire break safety control method comprises: During the wire drawing and winding process, the winding frequency converter reads the current operating frequency in real time and compares the current operating frequency with the preset maximum operating frequency; If the current operating frequency is greater than or equal to the maximum operating frequency, it is determined that a disconnection fault occurs, and the output terminal sends a disconnection fault signal to the fault input terminal; After the wire-taking frequency converter reads the wire-breaking fault signal, the wire-taking frequency converter performs emergency stop control on the wire-taking machine.

2. The wire breaking safety control method for wire drawing equipment according to claim 1, characterized in that: The maximum operating frequency is N times the maximum allowable frequency of the take-up frequency converter. <N<1。 3. The wire breaking safety control method of the wire drawing equipment according to claim 1, characterized in that: The control end of the wire drawing machine is connected to a PLC controller, and the output terminal of the wire taking-up inverter synchronously sends the wire break fault signal to the input terminal of the PLC controller. After the PLC controller reads the wire break fault signal, the PLC controller controls the wire drawing machine to stop.

4. The wire breaking safety control method for wire drawing equipment according to claim 3, characterized in that: The PLC controller is connected to an alarm device, and after the PLC controller reads the disconnection fault signal, the alarm device issues a disconnection fault alarm.

5. The wire breaking safety control method for wire drawing equipment according to claim 1, characterized in that: The wire drawing machine is provided with a tension arm, and the wire output by the wire drawing machine passes through the tension arm and enters the wire taking-up machine. The tension arm is provided with a position sensor for detecting the position signal of the tension arm during the wire drawing and taking-up process. The wire taking-up frequency converter receives the position signal and performs PID adjustment on the rotation speed of the wire taking-up machine.

6. The wire breaking safety control method for wire drawing equipment according to claim 1, characterized in that: The output end of the wire unwinding machine, the input and output ends of the wire drawing machine, and the input end of the wire taking-up machine are all provided with guide wheels.

7. The wire breaking safety control method of the wire drawing equipment according to claim 3, characterized in that: The PLC controller is connected with a touch screen, and the touch screen is used for human-computer interaction.

8. A wire drawing device, characterized in that: The wire drawing equipment adopts the wire breaking safety control method as described in any one of claims 1 to 7 to perform wire breaking safety control.

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