How to control the jumping tolerance in CNC machining?

Introduction

In CNC machining, there are a lot of different types of tolerances that need to be considered. One of the most important types of tolerances is the jumping tolerance, which refers to the change in a dimension between two points on a machined part caused by vibration or other issues during a machining process. Controlling jumping tolerance is crucial in ensuring the quality and reliability of machined parts. This article will explore some of the ways to control jumping tolerance in CNC machining.

1. Choose the right cutting tools

Selecting the right cutting tools is essential to control jumping tolerance. Using tools with larger diameters can help reduce vibration because they are stiffer and more stable. If cutting tools have a small diameter, the cutting forces will be larger, which can lead to vibration. Therefore, it is important to choose cutting tools that have a larger diameter but maintain the desired surface finish.

2. Reduce the speed of cutting

The speed of cutting also plays a significant role in controlling jumping tolerance. High-speed cutting can cause vibration because of the high frequency of oscillation. Reducing the speed of cutting will reduce the frequency and help to reduce vibration. It is important not to increase the cutting speed too much, even if it appears to save time, because it can result in a lower quality of machined parts.

3. Use the appropriate coolant

Using the right coolant is another way to control jumping tolerance. Coolant helps to reduce the friction between the cutting tool and the workpiece, which can help to reduce vibration. Using an inappropriate coolant or not using enough coolant can cause the cutting tool to become hotter, leading to vibration and lower quality machined parts.

4. Use a stiffer workpiece fixture

The stability of the workpiece fixture is also important in controlling jumping tolerance. Using a stiffer fixture will help to reduce the movement of the workpiece during the machining process, resulting in higher quality machined parts and lower jumping tolerance. It is important to ensure that the fixture is securely held in place and that there is no movement or vibration.

Conclusion

Controlling jumping tolerance in CNC machining is essential in ensuring the quality and reliability of machined parts. Choosing the right cutting tools, reducing the speed of cutting, using the appropriate coolant, and using a stiffer workpiece fixture are all effective ways to control jumping tolerance. By following these methods, you can ensure that your machined parts meet the required specifications and are of the highest quality possible.