The machining accuracy is measured by the tolerance grade. The smaller the grade value, the higher the machining accuracy. High processing accuracy means small processing errors, and vice versa. The actual parameters obtained by any processing method are not absolutely accurate. From the perspective of the function of the part, as long as the machining error is within the tolerance range required by the part drawing, the machining accuracy of the part can be guaranteed. The processing quality of mold parts includes processing accuracy and surface quality: processing accuracy is the degree of consistency between the actual size, shape and position of the part surface and the ideal geometric parameters required by the drawing; the deviation between the actual geometric parameters and the ideal geometric parameters is called processing error.

For complex cavities and multi-functional composite molds, as the shape of parts becomes more complex, the design and manufacturing level of the mold needs to be improved. Multi-slot, multi-material, multi-functional composite molds that are formed or assembled into parts in a set of molds have a large amount of processing and programming, comprehensive cutting capabilities, and high stability in deep cavities, which increases the difficulty of processing. The quality of the machine depends on the processing quality of the parts and the assembly quality of the machine. The processing quality of parts includes two parts: processing accuracy and surface quality. Machining accuracy refers to the degree to which the actual geometric parameters (size, shape and position) of the part after processing are consistent with the ideal geometric parameters. The difference between the two is called the machining error. The machining error reflects the machining accuracy. The larger the error, the lower the processing accuracy; the smaller the error, the higher the processing accuracy; the main aspects that affect processing accuracy are: dimensional accuracy, the degree of coincidence between the actual size of the processed part and the center of the part's dimensional tolerance zone

Mold drawings refer to the parts or components of the device design mold: it can also refer to the mold parts or components that are repositioned on the device after damage. Precision mold companies are generally composed of many important parts and can be divided into the following two categories: Process analysis Parts and structures and parts. The main parts of the process have a social impact by directly affecting the quality management of the molded product service. The decisive quality of the process parts is achieved by precision machining methods in today's precision mold parts. The precision machining process is related to the life of the precision mold and the molded products. In addition to using slow wire cutting, EDM and other process techniques in the cleaning stage of precision mold drawing processing, another option is to use semi-finishing machining. Finally, heat treatment is based on grinding processing. Then during the grinding process of precision mold parts processing, students need to control many scientific and technical environmental parameters such as deformation, internal stress, shape tolerance and dimensional accuracy of the parts. , in the actual production practice, the operation is more difficult and there are many problems, but there is a method that can be summarized in time and effective learning for our precision processing and manufacturing process: control the precision mold drawing from the inside of the mold finishing process Part processing, we are able to choose appropriate processing for these different mold parts with different materials, different shapes and different technical capabilities, and provide more suitable processing solutions.