Two aspects of measuring the quality of mold processing

China's construction industry is developing rapidly, and the demand for aluminum profiles continues to increase. Therefore, the demand for aluminum alloy extrusion die design, manufacturing and production is also increasing. Aluminum profile products are widely used in all walks of life, and products continue to develop toward diversification and complexity, and the requirements for product processing accuracy are getting higher and higher. The extrusion die is the basis of the extrusion process, not only determines the shape, dimensional accuracy and surface condition of the extruded product. The quality requirements are getting higher and higher, and the processing requirements for molds are also increasing. Liu Xiangfeng, a senior analyst at Huaxia Mould.com, said that machining accuracy is the biggest requirement of machining, so how to effectively improve the machining accuracy of molds has become a difficult problem today.

Processing accuracy and surface quality

Machining accuracy is the degree of conformity between the actual size, shape and position of the three geometric parameters of the surface of the processed part and the ideal geometric parameters required by the drawing. Ideal geometric parameters are the average size in terms of size; in terms of surface geometry, they are absolute circles, cylinders, planes, cones, straight lines, etc.; in terms of mutual positions between surfaces, they are absolutely parallel. , Vertical, coaxial, symmetrical, etc. The deviation of the actual geometric parameters of the part from the ideal geometric parameters is called the machining error. (Guide: New Challenges Facing EDM Processing Technology)

Machining accuracy and machining error

Machining accuracy and machining error are both terms used to evaluate the geometric parameters of the machined surface. Machining accuracy is measured by tolerance grade, the smaller the grade value, the higher the accuracy; the processing error is expressed by numerical value, the larger the numerical value, the greater the error. High machining accuracy means small machining error, and vice versa. The actual parameters obtained by any machining method will not be 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, it is considered that the machining accuracy is guaranteed.

The quality of the machine depends on the machining quality of the parts and the assembly quality of the machine. The machining quality of the parts includes the machining accuracy and the surface quality. The machining accuracy refers to the actual geometric parameters (size, shape and position) of the part after machining The degree of conformity with ideal geometric parameters. The difference between them is called machining error. The size of the machining error reflects the level of machining accuracy. The greater the error, the lower the machining accuracy, and the smaller the error, the higher the machining accuracy.

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