TTM Group China can build all kinds of different size precision die and stamping / automation welding fixture/automotive checking fixtures/custom cnc turning parts, including large size as we have big CNC Machines. With a variety of mechanical equipment such as milling, grinding, wire cutting machines and drilling machines, we can effectively and accurately control the processing process.So,as a factory with rich experience in CNC Machines use,we would like to share that how to reduce tool radial runout in CNC milling.

In the process of CNC cutting, there are many reasons for machining errors. The error caused by the radial runout of the tool is one of the important factors. It directly affects the minimum shape error that the machine tool can achieve under ideal processing conditions and the surface to be machined. Geometry accuracy.

So what is the cause of the radial runout?

1. The influence of the radial runout of the spindle itself

The main reasons for the radial runout error of the main shaft are the coaxiality error of each journal of the main shaft, various errors of the bearing itself, the coaxiality error between the bearings, the deflection of the main shaft, etc., and their influence on the radial rotation accuracy of the main shaft It varies with the processing method. These factors are formed in the process of machine tool manufacturing and assembly.

2. The impact of the inconsistency between the tool center and the spindle rotation center

During the process of installing the tool to the spindle, if the center of the tool is inconsistent with the rotation center of the spindle, it will inevitably cause radial runout of the tool.

So what are the ways to reduce radial runout?

The radial runout of the tool during machining is mainly because the radial cutting force aggravates the radial runout. Therefore, reducing the radial cutting force is an important principle for reducing radial runout. The following methods can be used to reduce radial runout:

1. Use sharp knives

Choose a larger tool rake angle to make the tool sharper to reduce cutting force and vibration. Choose a larger tool relief angle to reduce the friction between the main tool flank and the elastic recovery layer on the transition surface of the workpiece, thereby reducing vibration.

2. The rake face of the tool should be smooth

During processing, the smooth rake face can reduce the friction of chips against the tool, and can also reduce the cutting force on the tool, thereby reducing the radial runout of the tool.

3. Reasonable use of cutting fluid

Rational use of cutting fluid with cooling effect as the main aqueous solution has little effect on cutting force. Cutting oil with lubricating effect can significantly reduce cutting force. Due to its lubricating effect, it can reduce the friction between the rake face of the tool and the chips, as well as between the flank face and the transition surface of the workpiece, thereby reducing the radial runout of the tool.

After all,practice has proved that as long as the manufacturing and assembly accuracy of each part of the machine tool is guaranteed, and a reasonable process and tooling are selected, the impact of the radial runout of the tool on the machining accuracy of the workpiece can be minimized,hope this article can help you all!