First, the types of commonly used fixtures: CNC fixtures commonly used fixtures are generally the following: 1, universal combination fixture. It is suitable for milling small and medium-sized workpieces in small batch production or development on CNC milling machines. 2. Special milling fixtures. This is a fixture specially designed for a certain or similar workpiece, which is generally used when the annual output is large or when it is developed. The structure is fixed and used only for the specific process of a specific part. The design of such a fixture should be simplified to minimize the manufacturing time. 3. Multi-station fixture. It can clamp multiple workpieces at the same time, which can reduce the number of tool changes. It has been easy to process one side and load and unload workpieces on one side, which is beneficial to shorten the auxiliary time and improve productivity, which is more suitable for medium-volume production. Pneumatic or hydraulic clamps. It is suitable for large-volume production occasions. It adopts other fixtures and is particularly labor-intensive and labor-intensive. It can reduce labor intensity and increase productivity. However, such fixtures are complicated in structure, often costly, and have a long manufacturing cycle. 4. Universal milling fixture. There are universal adjustable clamps, vise, indexing head and three-jaw chuck. Second, the principle of selection of CNC milling machine fixture: 1, in the selection of fixtures, usually need to consider the production volume, production efficiency, quality assurance and economy; 2, in the production of small or development, should be widely used universal combination fixtures, It is only used in combination fixtures that cannot be solved by considering other fixtures. 3, small batch or batch production ten can consider the use of special fixtures, but should be as simple as possible. 4. Multi-station clamps and pneumatic and hydraulic clamps can be considered in production batches.
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