1.How to select stamping oil for ordinary cold-rolled steel sheets?
This is the most basic scenario. Prioritize viscosity and rust prevention:
- Simple stamping and shallow drawing: Choose a lower viscosity stamping oil for easier subsequent cleaning.
- Medium-difficulty forming: Choose a medium viscosity oil to ensure lubrication.
- Rust prevention is required: Choose a rust-preventive stamping oil, eliminating the need for applying rust-preventive oil.
2.How to choose stamping oil for galvanized/color-coated steel sheets?
Special care should be taken to avoid "white rust". Chlorine-containing additives may react with zinc and cause corrosion. It is recommended to use sulfur-containing or special stamping oil and degrease and clean as soon as possible.
3.How to choose stamping oil for stainless steel?
The increased difficulty necessitates "extreme pressure" performance. Stainless steel is prone to work hardening, requiring the use of specialized drawing oils containing extreme pressure additives such as sulfur and chlorine to form a strong lubricating film and prevent cracking and burrs.
4.How does the difficulty of the stamping process affect the strength of the oil film?
Simple blanking and shallow drawing: These processes have low lubrication requirements, primarily serving cooling and rust prevention functions. Low-viscosity, quick-drying blanking oils or ordinary stamping oils can be selected.
Deep drawing and heavy-duty forming: These processes involve large material deformation and intense friction with the die, easily generating heat. High-viscosity extreme pressure drawing oils must be used in these cases. These oils contain special extreme pressure additives that form a strong chemical lubricating film under high temperature and pressure, preventing the die and workpiece from "welding" or being scratched.
5.Does the workpiece need to be cleaned or assembled immediately after stamping?
For electroplating and painting: If the workpiece requires subsequent surface treatment, the surface must be absolutely clean. In this case, choose an easy-to-clean or low-residue stamping oil. Quick-drying stamping oil is a good choice; it evaporates rapidly at room temperature, keeping the workpiece surface dry and clean, and can even be assembled directly, eliminating the need for cleaning.
For inter-process rust prevention: If the stamped parts will not immediately proceed to the next process and need to be stored for a period of time, then the stamping oil itself should have a certain rust-preventive capability. Pay attention to the "rust prevention period" in the product specifications and choose an oil that provides 1-3 months or even longer of rust prevention, thus saving on additional rust prevention treatment costs.