The accuracy is an essential factor of the CNC machining’s performance, as the final machining accuracy and machining efficiency of the workpiece, in addition to the reasons of the CNC machine itself, it should also be based on reasonable machining route setting, tool selection and correct installation, reasonable selection of cutting amount, programming skills and rapid control of dimensional accuracy. You may want to know how can the workpieces be controlled at a proper accuracy, this article will let you know how it can be approved.
CNC machining is a project working based on CNC programming. A tiny change of machining program can directly affect the final machining accuracy and efficiency of the machining tool. The start of the accuracy can start from the clever use of intrinsic programs, reduction of cumulative errors in CNC systems, and flexible use of main programs and subroutines.
There are 6 ways to improve a CNC machining workpiece.
1.Getting a Perfect with Experienced Programming Skills
CNC programming is the most basic work in CNC machining. An experienced programmer, he knows how to write a good program. He can cleverly use the inherent program, avoid the cumulative error of the CNC system, and use the main program and subroutine flexibly.
In the process of complex mold processing, we generally adopt the form of multi-piece processing. If there are several of the same shape, the relationship between the main program and the subprogram should be used, and the subprogram should be used repeatedly in the main program until the processing is completed. So as to ensure the consistency of the processing size and improve the processing efficiency.
Incremental computing, also known as incremental computation, is a software that has the function to save time by only computing those outputs which depend on changing data. It is commonly used to write a program, and sometimes it can cause a certain cumulative error of continuous execution of multi-segment programs.
Now we try to absolute computing to write a program, which can reduce the cumulative error of the CNC system and ensure the processing accuracy.
Incremental computing, also famed as incremental computation, is a software feature that tries to save time by recomputing only those outputs that depend on the changed data when data changes. We often use incremental calculations to write programs, but continuous execution of multiple programs will produce a certain cumulative error. Now the absolute computing is applied by us to write the program, it can help reduce the cumulative error of the CNC system, also ensure the machining accuracy.
What is machining accuracy? Explain this concept in simple terms. Accuracy refers to the difference between the actual measurement value and the system measurement value. If the difference between the two is very small, then the accuracy of the measurement is high.
2.Adjust the process system
Trial cut-adjust the blade extension base on the feature of the material, and then apply the same material used in your project to perform a trial cut. It is often used for single-piece small batch production.
Adjustment method-after adjusting the relative position of the machine tool, fixture, workpiece, and cutting tool, the size can be known. We often use it for mass production.
3.Reducing the measurement errors
Improve the rotation accuracy of the bearing.
Choose high-precision cylindrical roller bearings, multi-oil wedge bearings and hydrostatic bearings.
4.Use the bearing to improve the part’s accuracy
Improve the machining accuracy of box support hole and spindle journal.
Measure and adjust radial runout range of corresponding parts to reduce error
5. Reduce tool wear
Re-grinding tool, prolong tool life.
Use special cutting oil, lubrication is sufficient.
Select the right lathe tool for machining.
6.Low down the thermal deformation of the process system
The thermal error of the machine tool is related to the cutting speed, feed rate, processing time and ambient temperature.
Conclusion: Known workpiece error consists of two parts: machine tool error (including geometric error and thermal induced error) and cutting induced error. After reading this article, you will know how to improve the accuracy and efficiency of CNC machining
