How to determine the tool setting point reasonable in machining?

In the machining process, the selection of the tool setting point is particularly critical, which directly affects the service life of the tool, machining accuracy and surface quality of the workpiece. So, how to determine the tool setting point is reasonable?
1. Selection of suitable machining tool setting position.
The machining tool setting point should be selected at a fixed position on the surface of the workpiece, which should have high machining accuracy and surface quality. Usually, the tool setting point should be selected in the geometric center of the workpiece or the axis of symmetry, so as to facilitate the installation and adjustment of the tool. At the same time, the position of the tool setting point should be as far away as possible from the clamping part of the workpiece to prevent collision between the tool and the fixture.
2. Ensure the flatness and cleanliness of the machining tool setting point.
If the surface of the tool setting point has large unevenness or oil, rust and other phenomena, it will affect the machining tool installation accuracy and machining quality. Therefore, before selecting the tool setting point, the surface of the workpiece should be fully cleaned and inspected to ensure that its flatness and cleanliness meet the requirements.
3. Consider the size and shape of the machining tool.
For smaller diameter tools, a smaller area of the workpiece surface can be selected for tool setting; for larger diameter tools, a larger area of the workpiece surface is required for tool setting.
4. Consider the stability of the machining process.
In order to improve machining accuracy and surface quality, tool deflection and vibration should be avoided as much as possible during the machining process. Therefore, when selecting the tool setting point, the contact area between the tool and the surface of the workpiece should be as large as possible to improve the stability of the tool. Meanwhile, the stability of the machining process can also be further optimized by adjusting the tool mounting method and the structure of the fixture.