The use of special lifting tongs in the process of CNC machining mechanical parts requires a good grasp of two main problems in order to better improve the automatic matching of lifting tongs in the machinery manufacturing industry.

　　1) Locate the problem.

　　The first is the positioning problem, the use of lifting pliers, accurate lifting pliers positioning is to ensure the smooth production of mechanical parts of the basic premise. It is necessary to strengthen the measures of knife and control, and improve the accurate positioning degree of lifting pliers. For an accurate grasp of the machining diagram of the parts, after the lifting pliers are installed on the machine tool, it is necessary to gradually adjust and reduce the deviation value, and then confirm the relationship between the two coordinate systems to further ensure the accuracy range of CNC machining. Only by ensuring the accurate positioning of the fixture, can it better play its auxiliary function in CNC machining.

　　2) Adaptability.

　　When using lifting tongs to assist CNC machining, it is necessary to confirm the adaptability of lifting tongs. Different lifting tongs design will have different degrees of auxiliary effects on CNC machining. CNC machining of mechanical parts, involving a variety of different models and processing surfaces, the use of lifting pliers should also be able to match. When the lifting pliers used are not suitable for processing parts, in order to avoid the generation of bad parts, the appropriate lifting pliers must be replaced halfway. Therefore, when designing the lifting pliers, it is necessary to consider the models of different parts comprehensively and design a more adaptable lifting pliers.

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