Analyze the parameter adjustment direction of CNC turning die parts

To analyze the parameter adjustment directions of CNC turning die parts, it is necessary to comprehensively consider the characteristics of the die parts from aspects such as cutting parameters, tool paths, tool selection and compensation, workpiece clamping, and machine tool maintenance. The following are the specific directions:

Adjustment of cutting parameters

Cutting speed: The selection of cutting speed should be based on the material of the workpiece and the tool. When processing mold materials with high hardness, the cutting speed should not be too high; otherwise, it will lead to accelerated tool wear. For instance, when processing quenched steel, the cutting speed should be controlled within a relatively low range to reduce the thermal load on the cutting tool.

Feed rate: The size of the feed rate will affect the quality of the machined surface and the cutting force. Under the premise of ensuring processing efficiency, the appropriate feed rate should be selected according to the precision requirements of the mold parts. For mold parts with high precision requirements, the feed rate should be appropriately reduced to improve the surface quality.

Depth of cut: The selection of depth of cut should take into account the power and rigidity of the machine tool. During rough machining, the depth of cut can be appropriately increased to enhance the metal removal rate. During finish machining, the depth of cut should be reduced to ensure machining accuracy.

Tool path parameter adjustment

Path planning: Rationally plan the tool path to avoid sudden changes in the tool path direction and ensure the smoothness of tool movement. Tool path simulation can be carried out using CAM software to optimize the path, reduce idle travel and repetitive cutting.

Tool entry and exit methods: Select appropriate tool entry and exit methods to avoid scratches on the workpiece surface. For instance, by adopting arc-shaped feed and retreat methods, the impact of the tool on the workpiece surface can be reduced.

Tool selection and adjustment of compensation parameters

Tool type: Select the appropriate tool type based on the processing requirements of the mold parts. For instance, when processing the cavity of a mold, a ball-end mill can be selected. When processing the flat surface of a mold, a face mill can be selected.

Tool geometric parameters: The rake Angle, relief Angle, principal deflection Angle and other geometric parameters of the tool will affect the cutting force and the quality of the machined surface. The appropriate geometric parameters of the cutting tool should be selected based on the processing material and processing requirements.

Tool wear compensation: During the processing, the tool will gradually wear out, causing changes in the processing dimensions. The amount of tool wear should be measured regularly and tool wear compensation should be carried out in the numerical control system in a timely manner to ensure the accuracy of the processed dimensions.

Adjustment of workpiece clamping parameters

Clamping method: Select an appropriate clamping method to ensure the rigidity of the workpiece during clamping. For thin-walled or slender mold parts, auxiliary supports or special fixtures should be adopted to reduce clamping deformation.

Clamping force: Control the clamping force reasonably to avoid workpiece deformation due to excessive clamping force. During the clamping process, the appropriate clamping method and clamping force should be selected based on the material and shape of the workpiece.

Machine tool maintenance and parameter adjustment

Machine tool accuracy adjustment: Regularly conduct accuracy detection and adjustment on CNC lathes to ensure the geometric accuracy and motion accuracy of the machine tool. The accuracy of machine tools will directly affect the processing accuracy of mold parts.

Cutting fluid parameter adjustment: Select the appropriate cutting fluid and reasonably adjust the flow rate and pressure of the cutting fluid. Cutting fluid can play a role in cooling, lubricating and cleaning, which is conducive to improving the processing quality and tool life.