Commonly used tool setting methods and error prevention measures for CNC machining centers
【Case summary】：To put it simply, the commonly used tool setting methods for CNC machining centers mainly include tool setting tool setting, automatic tool setting and trial cutting tool setting. Since a complete machining process of a workpiece may involve several or even dozens of tools, the trial-cutting method is relatively primitive and the tool setting accuracy is poor, so it is rarely used. Let's focus on the first two more typical knife setting methods: |
1. Commonly used tool setting methods for CNC machining centers
To put it simply, the commonly used tool setting methods for CNC machining centers mainly include tool setting tool setting, automatic tool setting and trial cutting tool setting. Since a complete machining process of a workpiece may involve several or even dozens of tools, the trial-cutting method is relatively primitive and the tool setting accuracy is poor, so it is rarely used. Let's focus on the first two more typical knife setting methods:
1. Automatic tool setting method
Automatic tool setting is realized by using the tool detection function of the CNC machining center. This device can automatically and accurately measure the length of each tool in each coordinate direction, and can automatically correct the tool error value. The entire detection and correction process can be performed in the machine tool. Realized on the basis of normal operation. This tool setting method is completely realized by the electronic control device, which eliminates the error of man-made tool setting, so the tool setting accuracy is higher and the tool setting efficiency is better.
2. Knife setting method with tool setting instrument
The tool setting tool is used for tool setting, because it is more economical, it is now the main method of CNC machining center tool setting. There are two types of tool setting: internal tool setting instrument and external tool setting instrument. The tool setting of the external tool setting instrument needs to be calibrated outside the machine tool in advance, and then the tool can be used after mounting the tool on the machine tool; .
2. Preventive measures for tool setting errors
Since the tools used by CNC machining centers are various and the tool sizes are extremely inconsistent, the tool setting method should be selected according to the actual machining situation, the program instructions should be determined, and the tool setting parameters and tool compensation values should be input. Even so, different tool setting methods may have some errors, which will affect the accuracy of workpiece processing.
When using the tool setting instrument, tool setting mirror and automatic tool setting, the error mainly does not originate from the manufacturing, installation and measurement errors of the instrument. In addition, the poor technique of using the instrument will also cause errors. Therefore, it is necessary to pay attention to the installation and measurement accuracy of the instrument, and more importantly, to master the correct method of using the instrument. Only the correct use and operation can minimize the error. At the same time, the quality and rigidity of the tool and the accuracy of the machine tool itself are also the reasons that affect the tool setting error. Therefore, it is also important to select qualified tools and regularly check the zero drift of the CNC machining center.
