tailieunhanh - Cutting Fluids Part 2

Tham khảo tài liệu 'cutting fluids part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Cutting Fluids 391 cutting fluid although certain non-ferrous metals may have a susceptibility to staining so here it is prudent to discuss the problem with the cutting fluid manufacturer Water-supply compatibility - a water-soluble cutting fluid should ideally be capable of being diluted with any water supply. Geographical locations can create variations in water supply and its condition this latter factor is especially true for water hardness see Fig. 199b where its hardness can vary quite considerably. Thus the ideal cutting fluid would not cause the typical problems of foaming in soft waters or forming insoluble soaps in hard waters Freedom from tacky or gummy deposits - as water soluble fluids dry out on a machine or component s surface the water content evaporates to leave a residue which is basically the product concentrate. This residue should ideally be light and wet allowing it to be easily wiped-off. However any gummy or tacky deposits collect swarf and debris necessitating increased machine and component cleaning Tramp oil tolerance - is a lubricating or hydraulic oil which leaks from the machine tool and contaminates the cutting fluid. Most modern machines are equipped with total-loss 6 slideway lubricating systems which can contaminate the cutting fluid with up to a litre of oil per day - on a large machine tool. The ideal cutting fluid would be capable of tolerating this contamination without any detrimental effects on its operating performance. Some cutting fluids are formulated to emulsify the tramp-oil while other fluid formulations reject it allowing 6 Total-loss fluid systems are as their name implies in that they purposely leak oil to the machine s bearing surface requiring periodic tank replenishment. When this oil leaks-out of the machine tool it is termed tramp-oil therefore the oil will eventually end up in the machine tool s coolant tank where it is either tolerated by the coolant product or is separated-out requiring periodic .