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Principle Of Straight Line Wire Drawing Machine
- Jul 22, 2017 -

Principle Of Straight Line Wire Drawing Machine

Metal products are an important part of metallurgical industry, but in our country, it is a weak link, and the mechanical and electrical equipment is obsolete, which hinders the development of the industry. In metal processing, straight-through wire drawing machine is a common one, in the past is usually used DC generator-Motor Group (f-d system) to achieve, now with the progress of technology and the popularization of inverter, frequency control has been used in a large number of straight-through wire drawing machine, and can realize the function of drawing variety setting, Operation automation, production process Control, real-time closed loop control, automatic counts and so on through PLC. The use of frequency conversion speed control system of straight-wire drawing machine technology advanced, energy-saving significant, speed range in the normal operation of 30:1, while the rated speed of 5% can provide more than 1.5 times times the rated torque. In this paper, the application process and effect of frequency conversion control are illustrated by using the frequency conversion transformation of stainless steel wire drawing machine produced by Tonglu wire drawing mechanism. The straight-line wire drawing machine mainly for the precision rolled out of the stainless steel wire stretch, the technical requirements of the design are as follows: (1) The highest drawing speed 600m/min, (2) processing varieties are mainly three species, respectively, the inlet line 2.8mm→ outlet 1.2mm, 2.5mm→1.0mm 2.0mm→0.8mm; (3) The emergency stop beheading is not more than.Straight Line Wire Drawing Machine


Straight-wire Drawing machine is the most difficult to control in the drawing machine, because it is a number of motors at the same time to stretch the wire, the efficiency of the operation is very high. Unlike the water tank drawing machine and the looper wire drawing machine, which allows the wire to slip between the molds. At the same time, it has higher requirements for the synchronism of motor and the rapidity of dynamic response. Because of the brittle characteristics of stainless steel materials, the lack of toughness, such as high carbon steel wire or steel cord, is easier to pull off during the operation. This system has a total of 8 11KW inverter. The system's electrical configuration is a live set, installed in the first stage, the role is to roll the stainless steel wire to the wire drawing part, because the looper can be free to slip, so this motor does not need special control. The wire drawing part has six diameter 400mm drum. Each drum is fitted with a cylinder swing arm for detecting position, the position of the swinging arm can be detected by the displacement sensor, and when the wire is pulled tightly, the wire will generate pressure on the upper cylinder of the swinging arm to move the arm down. Finally is the winding motor, this part adopts the conical bracket which slides by oneself, the entire process diameter basically does not change, therefore does not need to use the volume diameter computation function. Eight sets of motor power using inverter-specific motor, at the same time with mechanical braking device.Straight Line Wire Drawing Machine


The system logic control of the straight-wire drawing machine is more complicated and has various linkage relations, which is realized by PLC. Synchronization control is all in the tl-md320 inverter internal implementation, do not rely on external control. Its working principle is: according to the operator in the panel to determine the speed of the operation, the speed of the analog signal into the PLC, the PLC considering the time to increase the speed after the output of the analog signal according to a certain slope. The main purpose of this is to meet the needs of some operations, such as point moving, wire piercing and so on. The analog voltage signal of PLC output is received at the same time as the AI2 (AI1 or can) input of all inverter, as the main signal of speed. The signal of each swing arm displacement sensor is connected to the corresponding drum drive frequency converter as the feedback signal of PID control. Depending on the position of the swinging arm in the middle, set a given value for the PID. This system is very typical of the Feedforward PID control system, Cascade level, PID as a fine-tuning amount.Straight Line Wire Drawing Machine


Hangzhou Xingguan Machinery Co., Ltd

Add:NO.619, Zilin Road, Fuchunjiang Town, Tonglu County, Zhejiang, China, 311504

Con:Chen Hu

Tel:86-571-64662028

Fax:86-571-64662277

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E-mail:osm@ztxg.com