The processing sequence of CNC lathes mainly follows the following principles:

1. Rough first and then fine: The CNC lathe performs rough processing first and then fine processing. The purpose of roughing is to remove most of the allowance, while finishing is to obtain higher machining accuracy and surface quality.

2. Close first, then far: The parts close to the tool setting point are processed first, and the parts far away from the tool setting point are processed later. This can shorten the tool movement distance, reduce idle travel time, and improve processing efficiency.

3. Internal and external intersection: For parts that need to be processed with both internal and external surfaces, CNC lathes should first perform rough machining of the internal and external surfaces, and then perform fine machining of the internal and external surfaces. This ensures the rigidity and stability of the part during processing.

4. Base surface first: The surface used as a fine reference should be processed first. The more precise the surface of the CNC lathe positioning reference, the smaller the clamping error and the higher the quality of subsequent processing.

In the specific processing process of CNC lathes, it is also necessary to consider the impact of CNC lathe processing sequence on tool life, processing accuracy and processing efficiency. For example, CNC lathes should drill holes first and then flatten them to prevent shrinkage during drilling; process parts with large tolerances first, and then process parts with small tolerances to ensure that the small tolerance surface is not scratched and to prevent parts from deforming.

In addition, it is also very important for CNC lathes to select the appropriate cutting speed according to the hardness of the material. For example, carbon steel materials should use high speed, high feed, and large depth of cut; CNC lathe carbide should use low speed, low feed, and small depth of cut; titanium alloys should use low speed, high feed, and small depth of cut. .

To sum up, the processing sequence of CNC lathes is a process that comprehensively considers multiple factors and needs to be formulated based on specific processing requirements and part characteristics. Through reasonable selection of processing sequence, processing quality can be ensured, processing efficiency can be improved, and production costs can be reduced.