CNC processing medical devices, recrystallization annealing. It is used to eliminate the hardening phenomenon of metal wire and sheet in the process of cold drawing and cold rolling (hardness increases and plasticity decreases). The heating temperature is generally 50 ~ 150 ℃ below the temperature at which the steel begins to form austenite. Only in this way can the work hardening effect be eliminated and the metal soften.
The first process of machining workpiece should use rough datum. Whether the selection of rough datum is correct will not only affect the first process, but also affect the whole process of workpiece processing. The principle of reasonable allocation of machining allowance: considering the uniformity of machining allowance on important surfaces of workpieces, important surfaces should be selected as rough benchmarks. The principle of easy clamping: in order to make the workpiece positioning stable and clamped, the selected coarse datum is required to be as flat and smooth as possible, and there are no forging flash, casting riser cut marks or other defects, and there is sufficient support area. The principle that rough datum can not be reused in general.
The role of non-standard parts processing non-standard parts processing center is developed from CNC milling machine. The biggest difference with CNC milling machine is that the machining center has the ability of automatic exchange of machining tools. After installing tools with different uses on the tool library, the machining tools on the spindle can be changed through automatic tool change installation in one clamping to complete a variety of machining functions.
The machine tool has a high degree of automation, which can reduce labor intensity; CNC fine machining uses short cutting tools, which is the main feature of fine hardware parts. The short tool will significantly reduce the tool deviation, and then achieve excellent surface quality, avoid rework, reduce the use of welding rods, and shorten the EDM processing time. When considering five axis machining, it is necessary to consider the policy of using five axis machining die: use the shortest cutting thing to complete the machining of the whole workpiece as far as possible, including cutting programming, clamping and machining time, but can get a more perfect surface quality.
From the perspective of the main part of automation, CNC punch is the key part in sheet metal processing, and it is also the core foundation of part processing. Through the three box frame structure, it can ensure its stability, ensure the reliability of sheet metal processing components, and greatly reduce the errors caused in processing. After the numerical control punch is fixed, the traditional process technology can be improved through the application of automatic punch technology. With the replacement of automatic die, the construction efficiency is greatly improved. In the specific application, the mold information is transmitted to the control center of the sheet metal punch equipment, and the processing can be carried out automatically. In the automation of sheet metal machining, the application of system software is also more important, mainly the use of CNC software to control the implementation of punch technology.
In the process of operation, the manual welding machine mainly adopts low heat and normal temperature welding repair. The matrix does not heat, does not produce thermal deformation, the metallographic arrangement near the welding repair point remains unchanged, and there is no stress, crack, hard spot hardening, which does not affect the machining function. The operation of the manual welding machine is simple, and one machine can be used for multiple purposes. In addition to the surfacing correction function, it can also strengthen the surface coating of cemented carbide such as tungsten carbide. Argon maintains good adhesion, high welding strength, metallurgical bonding, and recondenses after the filler and matrix melt together, which is solid, fine and does not fall. After welding repair, various mechanical machining such as turning, milling, planing and grinding can be carried out
