Product quality requirements are getting higher and higher, and the processing requirements for molds are also increasing. Processing accuracy is the biggest requirement for processing, so how to effectively improve the processing accuracy of molds has become a difficult problem to solve today. Let us analyze the solutions for processing and manufacturing precision tooling. (info Overview: Yize Mould Manufacturer)



Solution 1: Mold processing quality includes processing accuracy and surface quality



precision tooling are composed of precision machined parts. The machining accuracy is the degree to which the actual size, shape, and position of the three geometric parameters of the surface of the machined parts conform to the ideal geometric parameters required by the drawing. Ideal geometric parameters, in terms of size, are the average size; in terms of surface geometry, they are absolute circles, cylinders, planes, cones, straight lines, etc.; in terms of the mutual positions between surfaces, they are absolute parallelism , vertical, coaxial, symmetrical, etc. The deviation between the actual geometric parameters of the part and the ideal geometric parameters is called machining error.



Machining accuracy and machining error are both terms for evaluating the geometric parameters of the machined surface. The machining accuracy is measured by the tolerance grade. The smaller the grade value, the higher the accuracy; the machining error is expressed by a numerical value. The larger the numerical value, the greater the error. High processing precision means small processing errors, and vice versa.



The actual parameters obtained by any processing method will not be absolutely accurate. From the function of the part, as long as the processing error is within the tolerance range required by the part drawing, the processing accuracy is considered to be guaranteed.



The quality of the machine depends on the processing quality of the parts and the assembly quality of the machine. The processing quality of the parts includes the processing accuracy of the parts and the surface quality. The machining accuracy refers to the difference between the actual geometric parameters (size, shape and position) of the parts after processing and the ideal geometry. The extent to which the parameters are consistent. The difference between them is called machining error. The size of the machining error reflects the level of machining accuracy. The larger the error, the lower the processing accuracy, and the smaller the error, the higher the processing accuracy.



Solution 2: Main aspects affecting the processing accuracy of precision parts or molds



1) Dimensional accuracy



Refers to the degree to which the actual size of the processed part matches the center of the tolerance zone of the part size.



Dimensional accuracy is controlled by dimensional tolerance. Dimensional tolerance is the allowable variation in part dimensions during cutting. When the basic dimensions are the same, the smaller the dimensional tolerance is, the higher the dimensional accuracy will be.



2) Shape accuracy



Refers to the degree to which the actual geometric shape of the machined part surface matches the ideal geometric shape. The six items used to evaluate shape accuracy include straightness, flatness, roundness, cylindricity, and line profile. Shape accuracy is controlled by shape tolerances. Except for roundness and cylindricity, which are divided into 13 accuracy levels, the rest are divided into 12 accuracy levels. Level 1 is the highest and level 12 is the lowest.



3) Position accuracy



Refers to the actual position accuracy difference between the relevant surfaces of the processed parts. The eight items used to evaluate position accuracy include parallelism, perpendicularity, inclination, coaxiality, symmetry, position, circular runout and total runout. Position accuracy is controlled by position tolerance, and the position tolerance of each item is also divided into 12 accuracy levels.



Solution 3: The relationship between dimensional accuracy, shape accuracy and position accuracy



Usually when designing machine parts and specifying the machining accuracy of the parts, attention should be paid to controlling the shape error within the position tolerance, and the position error should be less than the dimensional tolerance. That is, for precision parts or important surfaces of parts, the shape accuracy requirements should be higher than the position accuracy requirements, and the position accuracy requirements should be higher than the dimensional accuracy requirements.

Yize Mould Company is a custom designed injection mold and injection molding manufacturer, used for Medical supplies, electronic communications, automobile parts and other precision injection molded parts