Common problems and solutions in CNC machining

Q1: How to solve the dimensional accuracy error of components?

A1: Parts of the accuracy of the poor reasons and response methods.

Tool wear: Tool wear can lead to changes in cutting force, which affects the accuracy of part size.

Response methods: Regularly inspect and replace worn tools to ensure they are in good cutting condition.

Thermal deformation of machine tool: Machine tools may be affected by thermal expansion or thermal deformation during operation, resulting in part size deviation.

Response methods: Control machine temperature, take cooling measures, such as the use of coolant or cooling system installed to reduce the impact of thermal deformation.

The processing parameters are not set accurately: The inaccurate setting of machining parameters, such as feed speed and cutting depth, will affect the accuracy of part size.

Response methods: According to material characteristics, cutting tool types and processing requirements, reasonable setting of processing parameters. Try-cutting test was carried out, and the optimum processing conditions were found by adjusting the parameters.

Q2: How to solve the Surface finish difference?

A2:The reasons for the Surface finish and response methods.

Improper setting of cutting parameters: Incorrect setting of cutting parameters, such as too fast feed speed and too high rotation speed, will result in poor Surface finish.

Response methods: Optimize the cutting parameters, reduce the feed speed and adjust the speed to improve the Surface finish.

Tool wear or blade damage: Tool wear or edge damage can lead to irregular cutting and affect surface quality.

Response methods: Inspect and replace worn tools regularly to ensure the cutting edge is in good condition. Use High quality cutting tools to improve the cutting effect.

Improper cutting fluid: Improper selection and use of cutting fluids may result in poor lubrication or cooling of the cutting fluid, which may affect Surface finish.

Response methods: Select cutting fluid suitable for machining materials and tools, and according to the requirements of cutting fluid correct use and replacement.

Q3: The reason of size of parts and response methods?

A3: In CNC (computer numerical control) machining, the size of parts phenomenon is usually caused by one of the following reasons:

Cutting force imbalance: In the process of machining, if the distribution of cutting force is not balanced, will lead to part size phenomenon.

Response methods: Adjust cutting parameters, such as feed speed, cutting depth, so that more balanced distribution of cutting force. If possible, consider using multiple cutting tools to equalize the cutting forces.

Tool wear or blade damage: Tool wear or cutting edge damage will lead to non-uniform cutting, resulting in part size phenomenon.

Response methods: Regularly inspect and replace worn tools to ensure they are in good cutting condition. Use High quality cutting tools, and correct tool installation and adjustment.

Thermal deformation of machine tool: The machine tool may be affected by thermal expansion or thermal deformation during operation, resulting in the size of the part phenomenon.

Response methods: Control machine temperature, take cooling measures, such as the use of coolant or cooling system installed to reduce the impact of thermal deformation. The temperature compensation function can be considered when machining high precision parts.

Uneven clamping force: The non-uniform distribution of the clamping force of the parts in the fixture will lead to the phenomenon of the size of the parts.

Response methods: Adjust the clamping force distribution of fixture to ensure even clamping force. Use appropriate fixtures and clamping methods to ensure that the part is in a stable position during the machining process.

Q4: How to solve the processing out of the part size sometimes big sometimes small

A4:If the phase lamp of the CNC machining center is normal, but the part size is not stable, it may be caused by one of the following reasons:

Tool wear or uneven cutting edge damage: tool wear or uneven cutting edge damage will lead to uneven distribution of cutting force, resulting in part size is unstable.

Response methods: Regularly inspect and replace worn tools to ensure they are in good cutting condition. Use High quality cutting tools, and correct tool installation and adjustment.

Improper cutting parameters: Incorrect setting of cutting parameters may lead to variation of cutting force, and then affect the stability of parts size.

Response methods: Optimize cutting parameters, such as feed speed, cutting depth, cutting speed and so on, according to material characteristics and machining requirements for reasonable adjustment. Try-cutting test was carried out to find the best processing conditions by adjusting the parameters.

Thermal deformation of machine tool: The machine tool may be affected by thermal expansion or thermal deformation in the course of operation, resulting in the part size when large and small instability.

Response methods: Control machine temperature, take cooling measures, such as the use of coolant or cooling system installed to reduce the impact of thermal deformation. The temperature compensation function can be considered when machining high precision parts.