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Positioning standard for processing technology of auto parts machining
Nov 30, 2018

With the development and growth of the manufacturing industry, the processing requirements for auto parts machining are also getting higher and higher. In the design of process specifications, the correct selection of positioning standards has a crucial impact on ensuring the processing requirements of parts and arranging the processing sequence reasonably.

The positioning criteria of the auto parts machining process are divided into a fine reference and a rough reference. The unprocessed surface on the blank is used as a positioning reference. This positioning reference is called a rough reference. Using the machined surface as a positioning reference, this positioning reference becomes a fine reference. When selecting the positioning reference, the fine reference is often selected according to the processing requirements of the part, and the process route is reversed forward. Finally, which set of surfaces is selected as the rough reference can be used to process the fine reference.

The selection principle of the precision reference for auto parts machining is the principle of reference coincidence, the principle of unified benchmark, the principle of mutual benchmarking and the principle of self-determination; the selection of the rough reference is related to the processing of the first process, and the workpiece will be The whole process of processing has a major impact; from the perspective of ensuring uniform processing of important surface machining allowances, important surfaces should be selected as rough reference.

In order to make the positioning of auto parts machining stable and reliable, the rough reference used is as smooth and smooth as possible. No forging flash, casting sprue or other defects are allowed, and there is enough support area. .

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