Common problems and maintenance methods in the use of copper wire drawing fluid

November 21, 2023

Common problems and maintenance methods in the use of copper wire drawing fluid

Copper wire drawing oil is a kind of metalworking oil, also known as copper wire drawing liquid, copper drawing oil, copper drawing oil, is used for copper and its alloy drawing process, a kind of auxiliary, with lubrication, cleaning, cooling, rust prevention and other functions. What are the common problems with the use of copper wire drawing oil? What do you need to pay attention to in daily maintenance?

First.Common problems in the use of copper wire drawing fluid

1. Disconnect the cable

When the broken line occurs, the reasons may be many, according to the fracture shape analysis, generally can be divided into two categories, one is due to the copper material in the casting and rolling defects caused by the second is caused by various factors in the drawing process, which is mainly related to the drawing oil is insufficient trickling. Lubricity depends on the drawing oil formulation and the use of the emulsion (including: concentration, emulsification uniformity, emulsification stability, component content, etc.).

2. Bacteria

Water is a carrier for bacteria, and they grow very fast in the right environment, with emulsifiers and other natural ingredients. Bacteria can erode the emulsifier, turning it into an acidic ingredient and causing the pH to drop. Bacterial growth can cause instability of the emulsion, sometimes leading to demulsification, and accompanied by a special odor, affecting the surface quality of copper wire and reducing the lubricity of the emulsion.

For the above reasons, it is recommended to monitor the growth of bacteria. When the bacterial growth is large, it must be controlled with fungicides. The best precaution is to inflate the liquid, usually by circulating air through the emulsion, to stop the growth of anaerobic bacteria, which are the most dangerous to the system.

Step 3: Oxidation

Oxygen and sulfur can easily erode copper, forming compounds: black Cuo, Cu20; Red Cu2S. The reasons for these reactions may be as follows:

(1) anaerobic bacteria;

(2) There is a certain humidity on the copper wire after annealing;

(3) There is oxygen in the annealing process.

In order to avoid this phenomenon, the drawing solution must itself contain antioxidants in order to prevent all or part of the copper wire from blackening. Protective measures will be most effective during the final annealing process.

Second. Daily maintenance of copper wire drawing fluid

1. Management of the concentration of high-speed copper wire drawing solution

(1) The concentration is too high, the cost increases, and the mixed oil is easy to form a gel-like substance and difficult to filter;

(2) If the concentration is too low, there will be problems in processing performance, such as: shortened service life of the mold, poor product accuracy, decreased oxygen resistance, etc., which will lead to machine rust due to insufficient anti-rust performance, and problems such as easy corruption of the drawing fluid;

(3) Detection method of drawing liquid concentration in use: The palm sugar star meter (refractometer) can be used according to the actual refraction degree detected by multiplying the refraction coefficient of the product provided on the product data, and obtain the concentration of working liquid in actual use (actual concentration = refractometer reading × product refraction coefficient).

2. Daily maintenance of high-speed copper wire drawing liquid in use

(1) Accurately grasp the tank capacity and daily consumption;

(2) Preparation of new liquid or daily added water or concentrated liquid, requiring accurate measurement, concentration control within the range of process requirements;

(3) Every day, full-time personnel must be assigned to measure the use of working liquid concentration, pH value, oil temperature, adding raw liquid and other data must be recorded and archived.

3. Anti-rust and anti-oxidation of high-speed copper wire drawing liquid

If the drawing liquid contains a large amount of phosphoric acid, chloride ions, sulfate and other impurities, the drawing liquid is easy to rot, deteriorate, and the lubrication anti-rust performance decreases sharply; Water-based wire drawing liquid only has short-term anti-rust and anti-oxidation properties, if the processed product needs to stay for a long time between processes or when the climate changes greatly, it needs to be covered with protective film treatment in time.

Author:

Mr. James

E-mail:

sales@cn-lubricantadditive.com

Phone/WhatsApp:

+86 13783582233