The precise control of the outer diameter deviation of products encountered in the production of wire drawing machines?

Due to the uninterrupted production of copper wire drawing equipment, the drawing speed will gradually become out of sync with annealing, which will cause intermittent and irregular changes in wire diameter during drawing due to the varying traction speed.

The reasons for this phenomenon are as follows:

1. The instability of tension on the storage wheel. There may be many places in the production workshop where air pressure is used, which can cause the air pressure of the wire drawing machine's air pump to fluctuate, which makes the tension of the wire storage device not constant. However, due to the constant speed of wire collection, the tension on the wire drawing is also not constant, which can cause the deviation of the outer diameter of the single wire to be unable to be accurately controlled.

2. The vibration of copper wire on the annealing wheel. This allows the copper wire to be annealed in a loose and tight state, with varying current densities during annealing. However, the strength of the copper wire is relatively low at higher speeds, which can easily cause the copper wire to ignite on the annealing wheel and cause uneven wire diameter on the surface due to sparks.

3. Wear caused by long-term use of the main motor gearbox. This can cause the constant speed wheel speed of wire drawing to not match the traction speed and take-up speed, thus forming a single wire drawing process.

Solution:

Provide good lubrication to the wire storage device to prevent it from causing reverse friction on the wire during high-speed operation, thereby causing the wire to become thin;

Adjust the tension of the wire so that the drawing stroke is always close to the annealing wheel;

Ensure the integrity of the annealing wheel steel ring and avoid unstable annealing current caused by surface defects of the steel ring.

According to the actual situation of the wire drawing machine, re mold the wire drawing machine: adjust according to the wire drawing principle, so that the speed of the annealing wheel/the speed of the constant speed wheel=the forward slip coefficient × The diameter of the constant speed wheel/annealing wheel, where the diameters of the constant speed wheel and annealing wheel are known, and the rotational speed of the constant speed wheel and annealing wheel can also be measured. From this, the forward slip coefficient can be obtained. From the slip coefficient, the drawing machine can be re molded to meet the requirements.