Wire Drawing Machine

Wire drawing machine is one of the common metal wire processing equipment, which can stretch and wind steel wire, copper wire, aluminum wire and so on. Frequency converter is the key equipment in the wire drawing machine, it directly affects the quality of the wire drawing machine. This paper mainly takes the application of T600-LS308 special machine for wire drawing machine as an example to talk about the application characteristics of T600-LS308 special machine for wire drawing machine.

1. Introduction

wire drawing machine main role is to be relatively thick metal wire through the mold and then stretched into a relatively thin wire, generally through a number of molds step by step to pull the fine, the requirements of easy threading, fast speed, stability, and not break the line. Straight forward wire drawing machine is more than one motor at the same time on the metal wire stretching, the efficiency of the operation is very high. It does not allow the wire to slip between the molds of each channel, and at the same time it has high requirements on the synchronization and dynamic response of the motor. So the performance of the inverter directly determines the quality of the wire drawing machine, and at the same time, the winding part is required to have high requirements.

2. Drawing machine performance requirements

• low-frequency torque, smooth output
• high-performance vector control
• energy-saving effect
• proportional linkage control with high precision
• to maintain constant tension, prevent breakage
• the use of the latest high-speed motor control special chip DSP, to ensure that the vector control fast response
• modular design of the hardware circuit, to ensure that the circuit is stable and efficient operation of the Drawing machine inverter
• the structure of an independent duct design, the fan can be freely disassembled, good heat dissipation. Good heat dissipation
• No PG vector control, PG vector control, V/F control can be selected
• Powerful input and output multi-functional programmable terminals, speed pulse input, two analog output
• Wide voltage input, output voltage automatic voltage regulator (AVR), instantaneous power loss without stopping, adaptability stronger
• Built-in advanced PID algorithms, fast response, adaptable, simple debugging; 16-segment speed control, simple PLC to achieve timing, timing and speed control. Simple PLC to achieve timing, fixed-speed, directional and other multi-functional logic control, a variety of flexible control to meet the requirements of a variety of different complex working conditions
• Built-in international standard MODBUS RTU ASCII communication protocols, the user can be achieved through the PC/PLC control of the host computer inverter 485 communication network centralized control

3. System Composition

• For the equipment, the following models and components are selected as the electrical transmission equipment
• Drawing inverter T600-LS308
• Winding inverter T600-LS308
• Drawing motor adopts T600-LS308 inverter, set up the special parameters for stretching; winding motor adopts T600-LS308 inverter, set up the special parameters for winding.
• The running command and output frequency signal of the host machine are used as the running command of the slave machine. Take the running command and output frequency signal of the host machine as the running command and frequency command of the slave machine to realize synchronous operation
• When stopping, for the full disk with large weight, use the holding brake to prevent wire breakage caused by inertia
• Take the output voltage signal of the pendulum as the feedback signal to carry out the internal variable PID correction control, and carry out the speed prediction graphic operation, so as to realize the constant line speed rewinding.