Many customers will find that during the use of the tool holder, the runout of the tool holder measured on the machine tool is very large, and many customers suspect that there is a problem with the tool holder. Is there really something wrong with the handle? Let’s do some analysis:
In fact, the runout measured on the machine tool is not the runout of the tool holder alone, but the comprehensive runout of the entire system in which the machine tool spindle, tool holder and cutting tool (or measuring rod) are clamped together. This runout is not only related to the machine tool, tool holder and cutting edge, but also related to the clamping method and whether the operation is standardized (such as whether the shank of the tool holder and the jacket are clean, etc.).
However, if the runout of the tool holder is small when measured on the machine tool, it will definitely mean that the runout accuracy of the tool holder is good? Not necessarily! If you install a tool holder with good run-out accuracy and a tool holder with poor run-out accuracy on the same spindle with a relatively large run-out, and measure the run-out, the results may be exactly opposite. Even if it is the same spindle and the same tool holder, if the tool holder is rotated 180° back and forth twice and mounted on the spindle to measure the runout, the results may be completely different.
After the above analysis, I want to measure the runout accuracy of the tool holder on the machine tool:
1. First of all, ensure that the runout accuracy of the machine tool spindle is trustworthy. You can use a measuring stick in advance to test whether the runout accuracy of the machine tool spindle is within the required range.
2. Make sure that all mating surfaces such as the machine tool spindle, tool handles and cutting tools are clean, and ensure that they are operated in the correct way.
However, if the tool handle is often run out when measured at the customer's site, the customer will first suspect that it is a problem with the tool handle. Here is a method that can quickly determine whether it is a problem with the tool holder or the machine tool spindle in this case:
First, mark the position of the tool holder corresponding to the maximum runout value, then rotate the tool holder 180° and install it on the machine tool spindle and then measure the runout. If the maximum runout value is still near the marked position of the tool holder, it means that the tool holder has Problem; if the maximum runout value appears near the relative position of the tool holder mark, it indicates that there is a problem with the spindle.