This article introduces the characteristics of various continuous wire drawing machines

Pulley wire drawing machine

It is a non-slip dry continuous drawing machine with integrable wire; in the drawing process, the steel wire and the surface of the reel do not slide in the circumferential direction of the reel, and the wear of the two surfaces is relatively small. And when a reel in the middle is temporarily stopped, the reel behind it can still work for a period of time as usual depending on the amount of line accumulation. This model has the advantages of simple structure, convenient operation and maintenance, and low manufacturing cost. At the same time, it has a certain line accumulation coefficient, and the steel wire stays on the coil for a long time, which is conducive to the sufficient cooling of the steel wire. However, there are more wire guide wheels, which not only increases the number of bending of the steel wire, but also the product and pay-off of the reel cause the steel wire to twist along its axis during the drawing process, which seriously affects the internal quality and surface quality of the steel wire.
The characteristics of the pulley type wire drawing machine determines that this model is only suitable for drawing medium and small specifications, and relatively low quality and strength requirements for steel wire and other metal wires.

Double reel type wire drawing machine

Because the steel wire will be twisted during the drawing process of the pulley type wire drawing machine, a double drum type wire drawing machine was developed on the basis of the pulley type wire drawing machine. This model has the advantages of a pulley wire drawing machine, and eliminates the torsion phenomenon of the steel wire in the drawing process, and the cooling effect of the steel wire on the drum is better.

　　The double-drum wire drawing machine is the same as the pulley wire drawing machine. There are more guide wheels, especially the middle thread guide wheel between the upper and lower drums, which produces 180 when the steel wire passes through it. Because it is bent, it is not suitable for drawing large-size and high-strength steel wire; the operation of the machine is not as convenient as the pulley type, and the friction ring between the upper and lower reel and the wire wheel and other parts have a large moment of inertia, which limits the improvement of the drawing speed. This model is a transitional model developed from a pulley-type wire drawing machine to a higher-level wire drawing machine, suitable for drawing medium and small-sized steel wires.

　　 Looper wire drawing machine

In order to further improve the quality and drawing speed of the steel wire, a looper-type wire drawing machine was developed. It is also a non-sliding wire drawing machine; it simplifies the route of the steel wire between the reels. Axial torsion is generated, and due to the use of a DC motor to drive, a large range of stepless speed regulation can be realized, which expands the selection range of elongation between the reels, and the wire drawing machine can run in the most reasonable working state. Moreover, the looper generates a pulling force or a counter-pulling force on each reel during the drawing process. In the drawing with looper tension and looper reverse tension, it can reduce the drawing force, prolong the life of the wire drawing die and reduce the consumption of kinetic energy. The looper type wire drawing machine is a continuous wire drawing machine that can automatically adjust the speed. Theoretically speaking, within the tolerance limit of the steel wire to the compression rate and the mechanical energy parameters of the machine, as long as the total process compression rate is greater than or equal to the total compression rate of the machine, the machine can automatically adjust the drawing process for any process. . Therefore, the looper type wire drawing machine is a relatively advanced wire drawing machine, suitable for drawing small and medium-sized high-strength steel wires and alloy steel wires.

The disadvantage of the looper wire drawing machine is that due to the use of DC drive, the electric speed control system is complicated, the manufacturing cost of the machine is high, and the maintenance is difficult. The looper tension needs to be adjusted when drawing wires of different specifications; therefore, the operation of the machine The technical level is relatively high. In addition, this model has many thread guide wheels, thread threading is more complicated, and the steel wire has many bending times, so it is not possible to draw large-size steel wires and hard materials.

straight wire drawing machine

Pulley type, double reel type and plug-in type wire drawing machines are all unable to draw large-sized steel wires and hard materials because of more thread guide wheels. In order to solve this problem, a straight wire drawing machine was developed. After the steel wire is wound several times on the previous reel, it directly enters the next drawing die and is wound on the next reel without passing any thread guide wheels in the middle, and the steel wire is linear between the two reels. It adopts DC drive like the looper type, and automatically adjusts the intermediate reel speed to adapt the machine extension coefficient to the actual extension coefficient of the steel wire, that is, automatically adjusts to the normal operating point of the machine. The machine compression ratio is equal to the process compression. rate.

The advantages of this model are simple threading, no twisting and small radius bending of the steel wire during the drawing process. Its shortcomings are that it cannot draw finer steel wires, the steel wire stays on the drum for a short time, and the cooling effect is poor; the application range of the wire drawing machine is small.

Adjustable roller linear wire drawing machine

This is a newer model that combines the advantages of the looper type and the straight-line wire drawing machine. It has the advantages of looper type no torsion, large speed range, high drawing speed, and good effect. It also has the advantages of simple straight-line steel wire route, convenient threading, and large-size steel wire. The steel wire has no small radius bending phenomenon in each drum, and the internal quality and surface quality of the steel wire can be greatly improved; because there is no intermediate wire guide wheel, the mechanical structure is much simplified compared with the looper type. The more advanced wire drawing machine is suitable for drawing high-strength, large-size round and special-shaped steel wires: but its large investment, complex DC speed control system, and difficult maintenance. The influence of these factors has brought a certain degree of promotion to its promotion. difficult.

water tank drawing machine

The salient feature of the water tank drawing machine zone 4 in the first five types of drawing machines is that the steel wire has different degrees of relative sliding between the wire and the coil during the drawing process (except for the finished reel), and the wire, reel, and wire drawing are in operation. The die is immersed in the cooling lubricant or sprayed by it, so it is called the water tank drawing machine.

Its advantages are compact structure, small footprint, high drawing density, no torsion of the steel wire in the drawing process, and high-speed drawing; because the drawing process is carried out in a cooling lubricant, the steel wire is cooled And the lubrication conditions are very good, and the quality is guaranteed.

Its disadvantage is that during the drawing process, there is relative sliding between the steel wire and the surface of the reel in the circumferential direction of the reel. The friction and the agitation of the reel to the cooling lubricant consume a lot of power, which not only reduces The efficiency of the machine. The surface of the reel is severely worn; due to the limitation of the structure of the machine, the bending radius of the steel wire in the drawing process is small, and the threading and other reasons determine that it is more suitable for drawing various fine steel wires. .