Precision CNC processing properties
发布日期：19年04 月18日 Source: Jindong Metal Products Release Date: April 18, 19
When precision machining targets nanometers, or even atomic units (atomic lattice distance is 0.1 to 0.2 nanometers) as the target, the cutting processing method can no longer be adapted, and special processing methods are required, that is, the application of chemical energy, electrochemical energy, and thermal energy Or electrical energy, so that these energies exceed the binding energy between atoms, thereby removing the attachment, bonding or lattice deformation of some atoms on the surface of the workpiece to achieve the purpose of ultra-precision machining. These processes include mechanochemical polishing, ion sputtering and ion implantation, electron beam exposure, laser beam processing, metal evaporation, and molecular beam epitaxy. These methods are characterized by very fine control over the amount of surface layer material removed or added. However, to obtain ultra-precision machining accuracy, it still depends on precise processing equipment and precise control system, and an ultra-precision mask is used as an intermediary. For example, the plate making of ultra-large-scale integrated circuits uses electron beams to expose the photoresist on the mask (see photolithography), so that the atoms of the photoresist are directly polymerized (or decomposed) under the impact of electrons, and then The polymerized or unpolymerized part is dissolved with a developer to form a mask. Electron beam exposure platemaking requires ultra-precision processing equipment with a table positioning accuracy of up to ± 0.01 microns.
What are the characteristics of the role? It is an automatic machine tool controlled by a program. The control system can logically process the program specified by the control code or other symbolic instructions, and decode it by a computer, so that the machine tool can perform the prescribed action, and the blank is processed into a semi-finished product part by cutting the tool.
Traditional mechanical lathe processing is performed by manual operation of ordinary machine tools. During lathe processing, the mechanical cutter is shaken by hand to cut metal, and the accuracy of the product is measured by the eye with a caliper and other tools. Modern industry has long used computerized digitally controlled machine tools to perform operations, and any products and parts can be directly processed automatically in accordance with procedures prepared in advance by technicians.
The information is formed into a processing file according to a certain format (that is, a normal CNC machining program) and stored on an information carrier (such as a magnetic disk, perforated paper tape, magnetic tape, etc.), and then read by the CNC system on the machine tool (or directly through the CNC system) Keyboard input, or input through communication methods), by decoding it, so that the lathe machining action and machining parts, modern CNC machine tools are typical products of mechatronics, is a new generation of production technology, computer integrated manufacturing system technology, etc. basis.
The development trend of precision machining of modern CNC lathes is high speed, high precision, high reliability, multi-function, composite, intelligent and open structure. The main development trend is the development of intelligent full-function general-purpose numerical control devices with open architecture in both software and hardware. The CNC technology of Shanghai Machinery Parts Processing Factory is the basis of machining automation and the core technology of CNC machine tools. Its level is related to the country's strategic position and the level of reflecting the country's comprehensive strength. The development of detection technology. CNC machining is a numerically controlled machine tool with a tool magazine and automatic tool change, which can perform a variety of machining operations on a workpiece within a certain range.