High-quality cutting fluid achieves efficient processing


Wu Qingbo, Marketing Manager for Metalworking Fluids at Total Lubricants (China) Co., Ltd., said: "High-speed cutting has challenged the performance of all aspects of the cutting fluid, requiring cutting fluid manufacturers to have strong R&D capabilities to accommodate high-speed processing. Development.” There are many factors in the machining process that can affect the efficiency of machining, cutting fluid is one of them, the role of cutting fluid in the processing process can not be ignored. First of all, let's look at the following formula: Production in a certain period of time = machine unit productivity × product qualification rate × effective production time. Through the formula can clearly see how to improve the unit production efficiency of the machine tool, you can start from the following aspects: increase the unit feed, increase the spindle speed, shorten the workpiece clamping and tool change time. Which increase unit feed and increase the spindle speed involves the choice of cutting fluid. The cutting fluid lubricates, cools, cleans (puts chips into the flutes) and prevents rust during the metal cutting process, where lubrication, cooling, and processing speed are directly related. Increasing unit feed means an increase in the processing load. It requires a stronger processing (lubrication) capacity and cooling capacity of the machining fluid. It may require high-pressure, large-flow pump delivery. The fluid tank design of modern machine tools is becoming more and more compact. The time for processing the liquid to be defrosted is also getting shorter and shorter, which poses a challenge to the antifoaming and foaming capabilities of the machining fluid. Increasing the spindle speed means an increase in the tool or workpiece line speed. In the case of high-flow, high-pressure pump delivery, the resulting shock agitation will introduce more fluid into the cutting fluid, creating foaming. At the same time, the working fluid may be atomized under the action of strong impact force. The high temperature caused by high speed cutting may atomize the cutting fluid. These oil mist floating in the air will affect the operating environment of the workshop and the health of the employees. Drift also means the loss of oil. If it is pure oil, it will increase the risk of fire or explosion. High feed rates and cutting speeds also imply high cutting temperatures, which may also affect the oxidative stability of the cutting fluid. This requires that the oil base oil is highly refined, and an appropriate amount of antioxidant is added to increase its resistance. Oxidation performance. It may also involve the stability of water-soluble cutting fluids. The contribution of cutting fluids to high-efficiency machining is not always achievable without efficient machining of cutting fluids, because high-speed cutting generates large amounts of heat that can cause workpiece distortion and affect machining accuracy. In addition, the processing capacity of the coolant is also one of the key factors to ensure the quality of the workpiece and improve the qualification rate of the product. In order to ensure the excellence of each coolant product, Total researchers perform cutting tests on the machine tool and formulate recipes to ensure that each product can reduce cutting force, energy consumption, reduce tool wear, and achieve efficient machining. In the development of cutting fluid products, the performance of different formulations will have a huge impact on cutting efficiency and tool life. Health, safety, and environmental protection (HSE) is one of the most basic requirements for high-speed cutting, in which cutting fluid plays a key role. In mechanical processing, oil mist volatilization related cleaning and safety hazards are controlled by mechanical means, such as complex ventilation and filtration systems. Now, Total's researchers have succeeded in optimizing base oil and oil mist additives. The production of oil mist was reduced by more than 60%, and the generation of oil mist was reduced from the source. Minimize the negative effect of cutting fluid on HSE and reduce cutting fluid consumption and cutting costs. Efficient solution to improve processing efficiency High-speed cutting, the ultimate goal is to reduce the cost of a single piece, thereby reducing the cost of production of a single piece, in order to achieve better economic benefits. According to the formulae listed above, in order to maximize the output in a certain period of time, each factor must be made larger. Of course, we can also increase the effective production time by extending the service life of the cutting fluid and reducing the number of fluid changes in the cutting fluid. Cutting is a systematic project. The cost of the entire cutting process includes the initial loading and replenishment cost of cutting fluid (15% to 20%), the maintenance cost of cutting fluid (8% to 15%), and the discharge cost (15% to 25%). Tooling costs (40% to 50%), other expenses (10%), etc. To realize the low cost of cutting, it is necessary to weigh the pros and cons according to the weight of the entire cost. High-quality cutting fluid can not only reduce the maintenance cost of cutting fluid, waste liquid discharge cost, but also can reduce the cost of cutting tools and improve the cutting speed, among which the benefit brought by increasing the cutting speed is the most obvious. All these costs can be calculated. If the calculation is made with a 10% increase in production efficiency, other conditions remain the same, which can directly lead to the depreciation of fixed assets. The cost of labor costs such as labor costs is reduced by 10% for each part, and the resulting benefits are quite obvious.