Wenzhou Shenghong Metal Products Co.,Ltd , https://www.shenghonglock.comGrinding Fluid and Super Essential Oil Collection, Supply, and Filtration Process in Bearing Manufacturing (Part 1)
During the grinding process, high temperatures are generated in the contact zone between the grinding wheel and the workpiece. This can lead to rapid wear of the grinding wheel, damage to the surface of the part, and difficulties in maintaining machining accuracy. To address these issues, it is essential to introduce grinding fluid into the grinding area to reduce temperature, provide lubrication, cooling, cleaning, and rust protection.
When the grinding tool interacts with the metal surface, a significant amount of heat is generated due to friction. In high-speed grinding operations, the contact area often experiences extreme pressure conditions, which can reach several hundred degrees Celsius. Therefore, the grinding fluid must possess several key properties: excellent lubricity and anti-wear performance, effective cooling and cleaning capabilities, strong corrosion and rust resistance, as well as low foaming and antibacterial characteristics.
Grinding fluid plays a crucial role in the grinding process. Proper use of the fluid can enhance process stability, improve the quality of the workpiece, and extend the life of the grinding tools. Compared to other machining methods, grinding involves a large contact area between the grinding wheel and the workpiece, resulting in high friction and difficulty in delivering the fluid to the grinding arc. As a result, the workpiece is more prone to heat damage, and the grinding wheel may experience increased wear under heavy loads.
It is commonly believed that grinding fluids serve functions such as lubrication, cooling, cleaning, and rust prevention. However, the performance of grinding fluids can be classified into three categories: processing characteristics, inherent quality functions, and environmental adaptability. Processing characteristics refer to the cooling, lubricating, and cleaning effects during the grinding process, as well as their impact on the integrity and durability of the workpiece. The quality function relates to the physical and chemical properties of the fluid, while environmental adaptability concerns factors like odor, toxicity, and the biological and chemical oxygen demand (BOD and COD) of the fluid.
As the final step in bearing manufacturing, grinding has a direct impact on the accuracy, performance, and service life of the product. Coolant usage helps prevent burning on the workpiece, improves dimensional accuracy and surface finish, enhances the rust resistance of both the workpiece and machine tools, and significantly extends the lifespan of cutting tools and equipment.
However, when coolant is supplied separately, its concentration, pH level, and microbial content are difficult to control. The liquid supply systems used are often rudimentary, leading to contamination from iron filings and grinding dust. Over time, the coolant may become contaminated, leading to equipment damage and reduced part quality. Frequent coolant changes increase labor costs and environmental pollution, as many of these fluids are disposed of without treatment. Additionally, coolant leaks and evaporation in the workshop can negatively affect the working environment and the health of workers.
For large and medium-sized mechanical processing plants, it is recommended to implement a centralized coolant collection and supply system. This allows multiple machines to share the same coolant, reducing waste and improving efficiency. A combined transport system can collect wet chips and wear debris, minimizing manual disposal and improving working conditions.
The coolant collection system enables better protection of the fluid. By storing the coolant in a large tank and regularly sampling it, the original fluid or water can be replenished based on test results. This makes it easier to maintain the correct concentration and reduces the number of required samples. Regular monitoring ensures consistent fluid quality throughout its application period.
One of the most significant advantages of the collection system is its ability to remove oil and metal particles through centrifugation. It also eliminates a large portion of bacteria that accumulate at the interface between floating oil and metal particles. By checking the quality regularly and using additives or stock solutions as needed, the system can greatly extend the life of the coolant and reduce waste disposal. This not only saves costs but also minimizes environmental impact.
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Source: China Bearing Network | Date: December 9, 2013