Where should the stretching oil be brushed?

In the production process of metal stamping and stretch forming, the drawing oil mainly plays a role of lubrication, cooling, rust prevention and cleaning, which can greatly improve the surface quality of the stamping parts, prevent the drawing and reduce the scrap rate. So, where should the stretching oil be brushed better? Next, the author will give you a brief introduction. Stretching oil should generally be brushed between the die and the material, not between the material. The punch does not need to be coated with drawing oil, which is beneficial to the drawing process and helps to reduce the drawing coefficient. Because only in this way, can the friction between the blank and the pressing surface be reduced, the material can enter the concave mold easily, and the material can be thinned in the dangerous section, and it can cool the mold at the same time. Because the drawing oil will partially close the vents of the die, the air cannot be quickly discharged, causing bubbles on the surface of the part, and affecting the stamping property of the stamping part, reducing the friction between the punch and the material, causing the workpiece to slide, stretch and become thin . [Related recommendation] Learn more: What are the methods for polishing the surface of stainless steel? Learn more: Manufacturing characteristics of automobile stamping parts molds Learn more: Points to note in the design of continuous stamping dies (2)