The machining accuracy of CNC Turned Parts can usually reach a very high level, but the specific accuracy depends on multiple factors.
Generally speaking, the common precision of CNC turning can reach the following range:
Dimensional accuracy: between a few micrometers to tens of micrometers. For example, for some common industrial applications, dimensional accuracy can be controlled within the range of ± 0.01mm to ± 0.02mm.
Shape accuracy, such as roundness, cylindricity, etc., can usually reach around 0.005mm to 0.01mm.
Position accuracy: including coaxiality, verticality, etc., can generally be controlled between 0.01mm and 0.02mm.
However, by adopting more advanced CNC machine tools, high-quality cutting tools, optimized machining processes, and strict quality control measures, higher accuracy can be achieved. For example:
In the aerospace field, the dimensional accuracy requirements for certain key components may reach ± 0.005mm or even higher, and the shape and position accuracy are also required to be within the micrometer level.
In the manufacturing of precision instruments, such as parts of optical instruments, the machining accuracy may reach sub micron or even nanometer levels.
The factors that affect the machining accuracy of CNC turning parts mainly include:
The accuracy and performance of machine tools: The precision of the guide rail, the precision of the spindle rotation, and the stability of the feed system of the machine tool will directly affect the machining accuracy.
The quality and wear of cutting tools: The material, geometric shape, and degree of wear of cutting tools can affect cutting effectiveness and dimensional accuracy.
Improper selection of processing parameters such as cutting speed, feed rate, and cutting depth may lead to machining errors.
The material characteristics of the workpiece, such as hardness, uniformity, and thermal expansion coefficient, can affect the machining accuracy.
Clamping method: Whether the workpiece is firmly and accurately clamped will affect the stability and accuracy of the machining process.
For example, if the spindle of a machine tool has radial runout, it may cause roundness errors when turning cylindrical surfaces; If the cutting speed is too high, it may cause increased tool wear, thereby affecting dimensional accuracy.
The machining accuracy of CNC Turned Parts is usually very high, thanks to the precise control of CNC (Computer Numerical Control) technology.
Processing accuracy range:
The general CNC machine tool can control an accuracy between 0.01mm and 0.005mm during the machining process. This means that the deviation between the size and shape of the processed CNC Turned Parts and the expected design is very small. On some high-end or special CNC machine tools, the machining accuracy can even reach 0.004mm or lower.
Factors for achieving machining accuracy:
Machine tool accuracy: The accuracy of CNC machine tools directly determines the accuracy of CNC Turned Parts. This includes geometric errors, thermal deformation errors, and servo feed system errors of the machine tool.
Programming technology: The skill level of CNC programmers and their familiarity with machine tools can also affect the machining accuracy of CNC Turned Parts. Accurate programming origin determination and data processing techniques can ensure the accuracy of the machining process.
Tool selection: Choosing the appropriate cutting tool is crucial to ensuring machining accuracy. Different materials and processing requirements require different tool types and parameter settings.
Machining parameter settings: including the setting of parameters such as machining speed, feed rate, cutting depth, etc. The correct setting of these parameters can ensure the stability and accuracy of the CNC Turned Parts machining process.
Processing environment: A stable processing environment, such as temperature, humidity, vibration, etc., is crucial for the machining accuracy of CNC Turned Parts.
The impact of machining accuracy:
High precision CNC Turned Parts can meet the machining needs of various high-precision parts, such as aviation, aerospace, medical and other fields.
High precision machining can reduce the scrap rate of parts and the workload of subsequent processing, improving production efficiency.