Modern ultra-precision instrument processing and forming principles
发布日期：19年05 月13日 Source: Jindong Metal Products Release Date: May 13, 19
Modern precision machining and ultra-precision machining are classified according to the principles and characteristics of machining forming, and can be divided into three categories: removal processing, combined processing and deformation processing.
Removal processing, also known as separation processing, is the removal of all materials from the workpiece, such as turning agents, sodium cutting, grinding, and EDM.
Combined processing is the use of physical and chemical methods to bond (bonding) different materials together. According to the bonding mechanism, method, strength, etc., it can be divided into three types: attachment (hoim) and joint (joined). Adhesion processing, also known as deposition processing, is to cover a layer of material on the surface of the workpiece for bonding, such as electroplating and vapor deposition. Injection processing, also known as infiltration processing, is to inject certain elements on the surface of the workpiece to cause physical and chemical reactions with the base material to change the mechanical and mechanical properties of the surface material of the workpiece, which is a strong combination, such as oxidation, carburizing, Ion injection and so on. The connection is to connect two phases or different materials together through physical and chemical methods, such as welding and bonding.
Deformation processing, also known as flow processing, is the use of force, heat, molecular motion and other means to deform the workpiece and change its size, shape and properties, such as forging, casting, liquid orientation, etc.
It can be seen that the three major types of dense processing and ultra-sugar dense processing methods have a very wide processing range.
To analyze the flow of materials in the CNC precision machining process, removing the process is to gradually reduce the material, and a part of the material becomes chips. This flow is called dispersed flow. Combined processing is to gradually increase the material during processing. This flow is called confluence. In recent years, processing methods such as electroforming, crystal growth, molecular beam epitaxy, and rapid prototyping have been proposed, breaking through the concepts that traditional processing is mostly limited to separation and removal processing and surface bonding processing. In particular, rapid prototyping is a layered manufacturing method using high scatter / stacking forming technology.A three-dimensional solid part is decomposed into three-dimensional entities with a small thickness in several layers in a certain coordinate direction. It can be formed according to two piles of solids, and then selected and added to become the prototype of the required parts. Deformation processing refers to that the material is basically unchanged during the processing, which is called through flow.