Introduction to the functions of the hottest cutti

Cutting oil function introduction

special lubricating oil is prepared by mixing low viscosity lubricating oil base oil with some animal and vegetable fats, antioxidants, antiwear agents, rust inhibitors, etc. There are oil type and water type. The latter contains 80% - 95% water and has emulsifying ability, which is generally called cutting fluid. Cutting oil is used to lubricate and cool machining tools and components in the process of metal cutting

function

in metal cutting, cutting is carried out on the new surface every time, the speed changes from several millimeters to hundreds of meters per minute, and the pressure is as high as 2 ~ 3GPa. In addition to friction during cutting, the knife should be maintained regularly, and the tool should be forced to rub with the molecule inside the metal. The interface temperature of the cutting area can reach 600 ~ 800 ℃. Such high temperature and high pressure will reduce the strength and hardness of the tool, so the cutting oil must have four functions: cooling, lubrication, cleaning and rust prevention

reduce the experimental cost cooling

is manifested in reducing the tool tip temperature and inhibiting the thermal expansion of the cut material and tool, so as to improve the operating performance and machining accuracy. The thermal conductivity and specific heat capacity of water are higher than that of oil, and the viscosity is also lower than that of oil, so the cooling performance of emulsion is much better than that of oil

lubrication

reduce the friction between the rake face and chips, and between the rake face and the machined surface in 2008, so as to prevent adhesion and tumor accumulation 2 Restricted by rotation, scale stabbing or cold welding, to reduce power consumption and tool wear, and get a better surface finish

rust prevention

in order to prevent the corrosion of newly machined surfaces by water and oxygen in the atmosphere, antirust agents should be added to the cutting oil to improve the rust prevention performance of the cutting oil, so as to meet the needs of short-term protection of the workpiece in the processing process

cleaning

use the liquid flow to wash away fine chips and powder to prevent bonding, so as to ensure the continuous processing of tools and workpieces. In grinding, cutting oil with poor cleaning performance will block the grinding wheel, raise the temperature in the grinding area and burn the workpiece. Using low viscosity oil and adding surfactant can improve the cleaning ability of cutting

in addition to the above properties, the cutting fluid should also have the stability of lotion in the processing process, non stratification, resistance to hard water and resistance to bacterial contamination and deterioration

type

there are two types: oil type and water type

oil type

is also divided into mineral oil cutting oil (or composite oil), extreme pressure cutting oil and active cutting oil. The mineral oil used includes kerosene, diesel oil and light lubricating oil fractions. Mineral oil with a certain proportion of animal and vegetable oil (5% - 10%) is a composite oil, which is suitable for light load cutting. Extreme pressure cutting oil is added with sulfur, phosphorus and chlorine extreme pressure additives to meet the requirements of deep metal processing such as ferrous metals and gears. Active cutting oil is added with active sulfur and other compounds for deep drilling and tapping of high alloy materials

water type

can be further divided into general type, antirust type, extreme pressure type and transparent type. The first three are oil in water emulsions with emulsifiers and other additives (antiwear agents, etc.) added to the base oil of petroleum lubricants. The transparent type can be a transparent liquid with a small amount of lubricating oil or without lubricating oil (i.e. all water-based synthetic cutting fluid). Water based cutting oil has developed rapidly and been widely used in recent decades