Introduce the different classifications of machining.
Jun 15,2020
In the process of stopping manufacturing, mechanical processing mainly consists of several surfaces, studying the relative relationship of the part surfaces, and it is necessary to determine a reference. The reference is the point, line, or surface used on the part to determine the position of other points, lines, and surfaces. Depending on the different functions of the reference, it can be divided into design reference and process reference.
The reference used on the part drawing to determine other points, lines, surfaces, and positions is called the design reference. The process reference: the reference used during the processing and assembly of the part is called the process reference. The process reference can be further divided into assembly reference, measurement reference, and positioning reference based on different uses.
The reference used to determine the position of the part in the component or product during assembly is called the assembly reference. The measurement reference in mechanical processing: the reference used to check the dimensions and positions of the processed surfaces is called the measurement reference.
The reference used for positioning the workpiece during processing is called the positioning reference. The surface (or line, point) used as the positioning reference can only be selected from the unprocessed blank surface in the first process, and this positioning surface is called the rough reference. In subsequent processes, processed surfaces can be used as positioning references, and this positioning surface is called the fine reference.
Precision and ultra-precision machining are important components of modern mechanical processing manufacturing technology. When in use, they are one of the important indicators to measure the level of a country's high-tech manufacturing industry. With the development of computer and information technology, higher demands have been placed on manufacturing technology, not only requiring extremely high dimensional and geometric accuracy but also extremely high surface quality. It is under such market demand that ultra-precision machining technology has rapidly developed, with various processes and new methods continuously emerging.
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