The goal of leaving the processing waste on the workpiece is to remove the processed deviation and external shortcomings left by the previous process, such as the cold and hard layers, air holes, sand layers outside the casting, the oxide, decarburized layer, outer cracks outside the forging parts, and the outer cracks outside , Cut the inner force layer and external roughness after cutting. So as to improve the accuracy and external roughness of the workpiece. The huge details of processing waste have a great impact on the quality of processing and production efficiency.
The amount of processing is too large, not only the labor processing amount of mechanical processing, reducing productivity, and increasing data, objects and electricity consumption. CNC processing has improved the processing capital. If the amount of processing is too small, it will not be able to dispel all kinds of shortcomings and deviations of the upper procedures, and it will not be able to compensate for the deviation of the loading of the processing of this process to form waste products. Its extraction criteria are as small as possible under the prerequisite CNC processing of quality. Generally speaking, the more refined processing, the smaller the process balance.
When determining the CNC processing order, you must first clarify whether the parts need to be prepared before processing. Pre -processing is often completed by ordinary machine tools. If the blank accuracy is high and the positioning is more reliable, or the processing remaining amount is sufficient and uniform, it is not necessary to process it directly on the CNC machine. At this time, the division of CNC machine tools should be considered according to the accuracy of the rough benchmark.
