The "baking" test of high temperature and humidity in summer is here again! Metalworking fluids are most likely to "lose their temper" in this season - concentration gets out of control, they stink and deteriorate, and rust prevention fails... If you are not careful, both the processing quality and the service life of the equipment will be ruined! Today, let's talk about the core precautions for using metalworking fluids in summer, helping you maintain a stable production pace and save both time and money!
I. Concentration Control: Don't let the processing fluid "dehydrate"!
In summer, water evaporates rapidly, and the concentration of processing fluid is prone to soar, triggering a chain of problems:
Increased foam : Excessively high concentration can lead to a decline in lubrication performance, causing foam to splash during processing and affecting the line of sight and workpiece accuracy. Skin irritation : Solutions with a high pH value can easily cause peeling and allergic reactions on the hands of operators (especially when pH is greater than 10). Cost waste : Blindly replenishing the original liquid without replenishing water directly increases the usage cost.
Solution : Daily detection : Monitor the concentration with a refractometer. The recommended concentration for ferrous metals is 8%-10%, and for aluminum alloys, it can be slightly lower (5%-8%). Scientific liquid replenishment : First, dilute with water, then replenish the original liquid in proportion. Avoid directly pouring the concentrated liquid!
Case warning : In a certain precision processing factory, due to uncontrolled concentration, inorganic salts remained on the surface of the workpiece, increasing the subsequent cleaning cost by 30%.
Ii. Anti-corrosion and Anti-odor: Competing with Bacteria for Territory!
High temperature and high humidity = a "carnival party" for microorganisms! Once the processing fluid stinks and deteriorates, it not only affects the workshop environment but also accelerates the corrosion of equipment.
Common problems : Spoilage signals : the liquid turns gray and has a pungent odor (especially the "rotten egg smell" produced by anaerobic bacteria). Hidden risk : bacteria decompose the effective components, causing a sudden drop in anti-rust performance and an increase in the rusting rate of workpieces by more than 50%.
Countermeasures : Physical cleaning : Clean the floating oil and metal shavings in the liquid tank every week (miscellaneous oil is a "nutrient source" for bacteria). Chemical antibacterial : Add environmentally friendly bactericides (such as triazines), but the dosage should be controlled to avoid irritating the skin. Youdaoplaceholder0 ventilation circulation : During holidays when the machine is shut down, start the circulation pump regularly to prevent the liquid from standing still and breeding anaerobic bacteria.
Iii. Rust Prevention + Cooling: "Cool down" equipment and workpieces
In summer, the humidity is high and metals are prone to rust. High temperatures also reduce the cooling efficiency. How can we strike a balance?
1. Rust prevention: Prevent the workpiece from "developing spots" Choose the right product : Prioritize processing fluids containing organic rust inhibitors (such as borate esters) to avoid the precipitation and adhesion of inorganic salts to the workpiece. Film formation inspection : After processing, observe whether a uniform protective film is formed on the surface of the workpiece. If necessary, spray anti-rust agent again. 2. Cooling: Flow rate and pressure are key Increase flow rate : On hot days, it is recommended to increase the coolant flow rate by 20% to prevent local overheating of the tool from "burning" the workpiece. Equipment inspection : Regularly clear nozzle blockages to ensure that the coolant covers the processing area (case: a certain car manufacturer caused batch deformation of workpieces due to insufficient cooling).
Summer must-do list
The concentration is measured daily at , the clear liquid tank is weekly at , and new liquid is replaced monthly at . The workshop has prepared a "three-piece set" of pH test paper, disinfectant and oil skimmer. If you encounter a foul smell or color change, don't hesitate to stop the machine immediately and change the liquid!
