|Straight into type drawbench is drawbench most rambunctious one kind|
|11/7/2010 6:30:08 PM Hit:1|
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Enter type in a straight line drawing machine control frequency-inverter regulation has configuration succinct, logic clear, cost reduction characteristics, the paper also introduces in detail MD320 TL - inverter in the application of drawing machine. Keywords straight into type drawbench synchronous frequency conversion control metal products is an important part of the metallurgical industry in our country, but the industry is a weak link, mechanical and electrical equipment dated, hindered the development of the industry. In metal machining, straight into type wire drawing machine is a common kind, in the past are usually adopts dc generator - electric generator (F - D system) to realize, now with the progress in technology and inverter of popularization, frequency conversion control began to enter type in a straight line drawing machine, and can be used in great quantities in by PLC to realize drawing varieties setting, automatic operation, process control, real-time closed-loop control, automatic meter, and other functions. It adopts speed-adjusted system straight into type drawbench advanced technology, energy-saving significantly, speed range in during normal working for younger, and 5% of the rated speed can provide more than 1.5 times rated torque. Based on the tonglu tianlong drawbench factory producing stainless steel wire straight into type drawbench inverter as an example, illustrates the application of variable frequency control process and effect. The straight into type drawbench mainly to the fine rolling out of stainless steel wire for drafting and design process requirement is: (1) the supreme 600m/min drawing speed, (2) processing breed basically three, it is respectively into line 2.8 mm - 1.2 mm, 2.5 mm _ furnace-rough 1.0 mm, 2.0 mm - 0.8 mm, (3) the emergency stop bufo not more than 2. Straight into type drawbench is drawbench most rambunctious one kind, because it is the multi-motor simultaneously on the wire stretch, work efficiency of high. Unlike previous often met the cistern of wire drawing machine and live type of wire drawing machine, allowing wire in every toolings between skid. At the same time it on motor synchrony and dynamic response of the output have higher requirements. Because the stainless steel material characteristic compare brittle, lack of high carbon steel wire or cord like that toughness, easy in operation process pulled. This system consists of eight Taiwan 11KW inverter. The electrical system configuration for live sets a, installed in the first level, the function is will volumes of stainless steel wire traction to Las Vegas part, because living set free skid, so it doesn't require special motor control. There are six 400mm drawing part of drum diameter. Each drum are installed for detecting position between the cylinder swing arm, adopt the displacement sensor can detect the position of swing arm, when silk and tight, silk in of swing arm cylinder pressure makes swing arm above folding. Ultimately is winding motor, this part adopts sliding cone-shaped stents themselves, the whole process of coil diameter basic don't change, so there is no need to use coil diameter computing functions. An eight motor power using frequency electric vehicles, at the same time with mechanical braking device. Straight into type drawbench system logic control is relatively complex, there are various linkage relationship, by PLC. Synchronization aspects of the control are all in MD320 inverter TL - internal realization, don't depend on external control. Its working principle is: according to the operators on panel set decided the pace of work, the speed of the analog signals into PLC, PLC consider to add and subtract speed time according to certain slope after the analog signal output. The goal of this major is to satisfy the point start, wear silk some homework needs. PLC output analog voltage signal also received all the inverter AI2 (AI1 ok also) input, as speed Lord given signal. Each swing arm displacement sensor signal access to the corresponding drum drive inverter as PID control feedback signals. According to swing arm in the middle position, set yourself a PID of a given value. This system is very typical of PID control system with feedforward, level 1 string level, PID as fine-tuning quantity.
Author: Hangzhou Drawing machine factory