The Purpose of Drawing Oil in Drawing
Drawing is a manufacturing process that uses metal moulds to deform the shape of the workpiece. In the process of drawing, even cold drawing will produce a certain degree of frictional heat between the die and the workpiece. At the same time, the surface of the workpiece is also worn out. In order to reduce the above friction, extend the life of the mold, and maintain the quality of the product, drawing oil should be used.
Drawing oil, also known as die lubricant, is a kind of lubricant used in the drawing process. It is a lubricating oil with special performance. Drawing oil is composed of a variety of base oils and additives. It has a low evaporation rate and viscosity, good refrigeration, anti-wear and anti-rust performance, and can also resist heat. In addition, it also has certain adhesiveness and lubricity, so it is widely used in a variety of deep cold drawing, stamping, bending and calendering processes.
Drawing oil plays an important role in the deep drawing process. During the drawing process, drawing oil serves to reduce friction and sliding resistance between the die and the blank, thus reducing the temperature rise, minimizing mold wear, and improving the quality of the drawing product. In addition, it can reduce the surface oxidation of workpieces, reduce the retention of drawing force, and make the stamping easier. Therefore, drawing oil is very important in the deep drawing process.
Generally speaking, drawing oil is usually used in places where drawing parts need to be processed. The drawing oil should be selected according to the drawing material, the metallographic structure of the workpiece, the design of the mold and the drawing conditions. Generally, paraffin oil, fatty acid ester, polyester and PAG are used as drawing oil.
In short, drawing oil is a general term for all kinds of lubricants used in cold drawing. It is a good helper in the drawing process. It can reduce the friction and sliding resistance between the die and the blank during the drawing process, reduce the temperature rise, minimize the wear of the mold, reduce the surface oxidation of the workpiece, and improve the quality of the product. In addition, it can reduce the retention of drawing force and make drawing easier.
