The improvement plan of cutting fluid oil slick and impurities, two major problems in metal mobile phone shell processing
August 01, 2022
With the development of smart phones, people's pursuit of the appearance of mobile phones is getting higher and higher. Metal case mobile phones have gradually become the mainstream configuration, and the production process of metal case is also more demanding. Especially CNC machining, not only the machining accuracy is high, but also the surface finish usually has a mirror effect. Therefore, the management of cutting fluid is particularly important.
However, the cutting fluids on the market currently have two major problems: oil slick and impurities Oil slick effects 1) The concentration of cutting fluid changes, the performance becomes difficult to control, and the defective rate increases. 2) The lubrication effect becomes worse, the tool wear is serious, the quality of the machined surface becomes worse, and the defective rate cannot be controlled. 3) The risk of bacteria multiplying becomes greater, producing odor (smelling), and workers cannot work properly. 4) Reducing the PH value of the cutting fluid may cause corrosion and mildew of magnesium and aluminum alloys. 5) There is too much foam in the cutting fluid, which affects lubrication and cooling, resulting in an increase in the defective rate. Influence of impurities ⊙Producing surface residues on machine parts and working environment; ⊙Producing smoke and oil mist in the workshop environment; ⊙ hinder the filtering work of the filtering system; ⊙ Stimulate the reproduction of bacteria and produce odor; ⊙Reduces the wettability of metalworking fluid products, and causes rust problems on workpieces and iron filings; ⊙Reduce the ability of metalworking fluid to take away heat; ⊙Because of the surfactant in some miscellaneous oils, the metalworking fluid produces foam; ⊙If the oil contains active sulfur or zinc thiophosphate, it will cause dermatitis problems; ⊙It is difficult to control and measure the concentration of metalworking fluid; ⊙ Causes the loss of wetting agent and reduces the surface finish and tool life of metal parts. On machine tools with more miscellaneous oil, the negative impact of miscellaneous oil in machine tools is obvious. In the centralized cooling system, the negative effect of miscellaneous oil is even greater. Due to the small amount taken away, the miscellaneous oil is easy to accumulate. Due to the continuous circulation of the system, the pump mixes the miscellaneous oil into the metalworking fluid system to disperse or emulsify it.
Generally speaking, when machine tool miscellaneous oil is less than 2%, there are fewer problems; when it is above 2%, we start to see bacteria start to multiply; when it is above 4%, tool life, part finish, oil mist and Surface residues are all problematic. Miscellaneous oils from different sources have different effects, and even as little as 0.5% wax-containing rust inhibitor can cause serious problems. Machine tool miscellaneous oil contamination should be minimized and removed from the system as quickly as possible. For this reason, today I bring you the gospel of dealing with difficult problems: oil filter
Oil filter - the best companion for cutting fluid system
The oil filter first uses a filter bag to filter the solid impurities in the cutting fluid, and then removes the floating oil through the accumulation separator. The filtration cost of the oil filter is low, only one filter bag is needed; a repeatable filter bag can be used for more than 1 year; it is easy to move and can achieve a wide operating area. Generally, it is recommended to use one machine for one workshop; the maintenance cost is low, as long as Regularly remove solid impurities from the filter screen in front of the air separation pump; basically no maintenance costs are incurred; it is a good choice to use pressurized air as the power source, and no electricity is required.
