High efficiency and high precision of precision machining and plastic deformation

In terms of precision machining tools, the diamond grinding wheel is mainly used in the process of operation, which can effectively control the amount and feed of the back knife to a certain extent. On the ultra-precision grinder, it can be carried out during operation.
Grinding in ductile mode, namely nano-grinding. Even the surface of glass can obtain an optical mirror surface.

The development trend of precision machining and ultra-precision machining From a long-term development point of view, the manufacturing technology of its equipment is currently the main strategy and direction of the development of the national economy of all countries in the world, and it is one of the important means of economic development. At the same time, it is a long-term plan that is independent, prosperous, sustained and stable economic development, and maintained in science and technology. The development of science and technology has also put forward higher requirements for precision machining and ultra-precision machining technology.

High-efficiency and high-precision machining of precision machining and ultra-precision machining can achieve extremely high surface quality and surface integrity to a certain extent, but processing efficiency can be sacrificed. When the drawing method is used, the deformation force is only 17t, and when the cold extrusion method is used, the deformation force is 132t. At this time, the unit pressure acting on the cold extrusion punch is more than 2300MPa. In addition to high strength, the mold also needs to have sufficient impact toughness and wear resistance.

Precision machined metal blanks are strongly plastically deformed in the mold, which will increase the mold temperature to about 250°C to 300°C. Therefore, the mold material needs a certain tempering stability. Due to the above situation, the life of cold extrusion dies is much lower than that of stamping dies.

Precision machining pursues the high reliability of the product to a certain extent. During operation, the bearing and other parts that bear the load while doing relative movement can effectively reduce the surface roughness during operation, so that it can be improved. The wear resistance of the parts improves its working stability and prolongs its service life. Si3N4 used in high-speed and high-precision bearings. The surface roughness of the ceramic ball is required to reach several nanometers. The processed metamorphic layer is chemically active and susceptible to corrosion. Therefore, from the perspective of improving the corrosion resistance of parts, it is required that the processed metamorphic layer be as small as possible.