Do you know 2 important indicators of stamping and drawing oil?
April 21, 2022
Stamping drawing oil refers to the processing lubricating oil used in the stamping drawing process. Stamping is a forming and processing method that applies external force to sheets, strips, pipes and profiles by means of presses and dies to cause plastic deformation or separation to obtain workpieces (stampings) of desired shape and size.
When the material is stamped, it will directly rub against the tool and generate high temperature, which will cause problems such as material cracking, tool wear and scratches, and lubricating oil must be used to prevent the occurrence of the above problems. Generally, the lubrication state of metal processing can be divided into three types: fluid lubrication, boundary lubrication and no lubrication (dry friction). Extreme pressure effects (chemical properties) and oily effects (physical properties). Generally, stamping and drawing oil is prepared by adding oily agent, extreme pressure agent, rust inhibitor, antioxidant and other functional additives to the Base Oil. Therefore, the stamping and drawing oil must have the properties of lubrication, rust prevention, cooling, extreme pressure, etc. Features. From the relevant important indicators of stamping and drawing oil to see its performance: 1. Viscosity - Executive Standard: GB/T 265-1988 Viscosity is an important basis for choosing oil. The size of viscosity directly affects film thickness, fluidity, heat dissipation and pumpability. In addition, judging the degree of oil deterioration can often be known by viscosity measurement. Viscosity Index - For applications over a wide temperature range, the viscosity index is still somewhat important. A larger viscosity index can make the oil resistance not too large at low temperature, and can still maintain a lubricating film of sufficient thickness at high temperature. 2. Anti-wear four-ball test - executive standard: GB/T 3142-82 PB value (maximum non-seize load) The PB value is an index to measure the strength of the oil film of the stamping and drawing oil, and the highest load (kg force) that does not occur under the test conditions. Represents oil film strength. The wear scar measured under this load shall be a bright circular spot, and the diameter of the wear scar shall not exceed the standard diameter. PD value (sintering load) The PD value is an extreme pressure performance index to measure the stamping and drawing oil, and the minimum load (kg force) for the steel ball to sinter under the test conditions. Represents the extreme working capacity of the oil. The four steel balls should sinter together under this load. Professional stamping and stretching must have better extreme pressure, which is the specific embodiment of this indicator. Of course, this is to evaluate the comprehensive performance of a stamping and drawing oil from the perspective of professional evaluation. For end users, in fact, they are more concerned about the actual workshop use effect, and they do not need to be a professional stamping and drawing oil person. Just know how to choose a real stamping and drawing oil.
