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How to detect the accuracy of the tool handle
Release time:
2025-01-21
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Many customers will find that the runout of the tool holder measured on the machine tool is very large during the use of the tool holder, and many customers suspect that there is a problem with the tool holder. Is it really a problem with the tool holder?
Many customers will find that the runout of the tool holder measured on the machine tool is very large during the use of the tool holder, and many customers suspect that there is a problem with the tool holder. Is it really a problem with the tool holder? Here is some analysis:
In fact, the runout measured on the machine tool is not just the runout of the tool holder, but the comprehensive runout of the entire system where 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 tool, but also to the clamping method and whether the operation is standardized (such as whether the tool holder cone and the collet are clean, etc.).
However, does the small runout of the tool holder measured on the machine tool necessarily mean that the tool holder runout accuracy is good? In fact, not necessarily! On the same spindle with a relatively large runout, a tool holder with good runout accuracy and a tool holder with poor runout accuracy are installed to measure the runout, and the results obtained may be exactly the opposite. Even if it is the same spindle and the same tool holder, the tool holder is rotated 180° twice before and after and installed on the spindle to measure the runout, the results obtained may be completely different.
After the above analysis, if you want to measure the runout accuracy of the tool holder on the machine tool:
1. First of all, you must ensure that the runout accuracy of the machine tool spindle is trustworthy. You can use a measuring stick to measure whether the runout accuracy of the machine tool spindle is within the required range in advance.
2. Ensure that all matching surfaces of the machine tool spindle, tool holder and cutting tool are clean, and ensure that the correct method is used.
However, if the tool holder runout is large when measured at the customer's site, the customer will first suspect that it is a problem with the tool holder. 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 tool holder position corresponding to the maximum runout, then rotate the tool holder 180° and install it on the machine tool spindle and measure the runout again. If the maximum runout is still near the position where the tool holder is marked, it means that there is a problem with the tool holder; if the maximum runout appears near the relative position of the tool holder mark, it means that there is a problem with the spindle.
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