Precision machining is divided into cold processing and hot processing according to the temperature state of the workpiece to be processed. Generally processed at room temperature, and does not cause chemical or phase changes in the workpiece, called cold processing. Generally, processing at a state higher than or lower than normal temperature will cause chemical or phase changes in the workpiece, called hot processing. This involves the operational skills of the operators of the various equipment.

These skills include a deep understanding of the equipment, the understanding of machining, the understanding of processing parts materials, etc., these skills can be slowly accumulated in the usual work, the key to the skills of the operator is practice, theory to understand. Product assembly, commissioning, painting and packaging. The content of production process is very extensive, modern enterprises use the principles and methods of system engineering to organize production and guide production.

Think of the production process as a production system with inputs and outputs. The two are closely related, many precision and ultra-precision machining to rely on automation technology to achieve the expected indicators, and a lot of manufacturing automation depends on precision machining to accurately and reliably achieve. Both have a global, decisive role, is the pillar of advanced manufacturing technology. The surface finish in question is 0.8, if it is Ra value, it can be regarded as precision machining.

If it's an Rz value, it's ultra-precision machining. If it is a small piece less than 10 mm, it can not be regarded as a precision workpiece. Refer to the tolerance precision grade table for details. Before making the fixture, measure the appearance tolerance of several products, and try to ensure the matching effect of the fixture with the product. The fixture uses the treated material to ensure the durability of the fixture, and the stability of the machine will be greatly improved.

In the case of rotten teeth, in this case, we must use the tapping oil with good enough lubrication and fast enough cooling, which can both lubricate and cool, many customers do not like to use tapping oil, feel that it is very troublesome to process it and clean it once, at this time generally choose emulsion and water cooling.