High hardness requirements for mold steel materials

The machining accuracy is measured by tolerance grade, and the smaller the grade value, the higher the accuracy; The processing error is expressed numerically, and the larger the value, the greater the error. High machining accuracy means small machining errors, and vice versa; The actual parameters obtained by any processing method will not be absolutely accurate. From the perspective of the function of the part, as long as the processing error is within the tolerance range required by the part drawing, it is considered to ensure the processing accuracy. The machining quality of mold accessories includes machining accuracy and surface quality: machining accuracy refers to the degree of conformity between the actual dimensions, shape, and position of the machined part surface and the ideal geometric parameters required by the drawing; The deviation between the actual geometric parameters of the part and the ideal geometric parameters is called machining error. 

For complex cavities and multifunctional composite molds, as the shape of the parts becomes more complex, it is necessary to improve the design and manufacturing level of the molds. Multi functional composite molds with multiple grooves and materials formed or assembled into components in one set of molds require a large amount of programming, advanced hole cavity comprehensive cutting ability, and high stability, which increases the difficulty of processing. The quality of a machine depends on the machining quality of the parts and the assembly quality of the machine. The machining quality of parts includes two major parts: machining accuracy and surface quality. Mechanical machining accuracy refers to the degree to which the actual geometric parameters (size, shape, and position) of the parts after machining match the ideal geometric parameters. The difference between them is called machining error. The magnitude of machining error reflects the level of machining accuracy. The larger the error, the lower the machining accuracy, and the smaller the error, the higher the machining accuracy; The main aspects that affect machining accuracy are dimensional accuracy, the degree of conformity between the actual dimensions of the machined part and the center of the tolerance zone of the part dimensions.