RUIHAN TOOLS Method to reduce tool radial runout:

RUIHAN TOOLS Method to reduce tool radial runout:

The radial runout of the tool during machining is mainly due to the radial cutting force exerting radial runout. Therefore, reducing the radial cutting force is an important principle to reduce radial runout. There are several ways to reduce radial runout:

1. Use sharp tools

Choose a larger tool front angle, so that the tool is more sharp, to reduce the cutting force and vibration. The use of a larger tool rear angle, reducing the tool main blade face and the workpiece transition surface of the elastic recovery layer between the friction, which can reduce the vibration. However, the front and rear corner of the tool can not be selected too large, otherwise it will lead to the strength of the tool and the cooling area is insufficient. To combine the specific situation of different tool front and rear angle, roughing can take a small number, but in the finishing, for reducing the tool radial runaway considerations, you should get some larger, so that the three sides of the milling The knife is sharper.

2. Use a high-strength tool

Mainly through two ways to increase the strength of the tool. First, you can increase the diameter of the arbor When subjected to the same radial cutting force, the diameter of the arbor increases by 20% and the tool's radial runout can be reduced by 50%. The second is to reduce the length of the tool out of the tool, the greater the length of the tool extension, the greater the deformation of the tool when processing, processing in constant changes in the radial runout of the tool will continue to change, resulting in the workpiece The machined surface is not smooth. Similarly, the tool extension length is reduced by 20% and the radial runout of the three-edge cutter is reduced by 50%.

3. The nose of the tool should be smooth

In the processing, the smooth rake face can reduce the friction of the chip to the tool, but also can reduce the cutting force of the tool, thereby reducing the radial runout of the tool.

4. Spindle taper hole and chuck clean

Spindle taper holes and chucks are clean and can not have dust and debris generated when the workpiece is machined. Selection of processing tools, try to use a shorter length of the knife on the knife, the intensity should be reasonable and uniform, not too large or too small.

5. engagement selection to be reasonable

When the amount of knife is too small, there will be the phenomenon of processing slippage, resulting in the tool in the radial direction of the movement of the ever-changing, so that the processing of the surface is not smooth when the knife is too large, the cutting force will increase, thus Resulting in large deformation of the tool, increasing the three-edge cutter in the radial radial runout, will make the processing of the surface is not smooth.

6. Use reverse milling during finishing

As the milling distance between the screw and the nut is changed, the feed of the table is uneven, so that there is impact and vibration, affecting the machine tool, the life of the tool and the surface roughness of the workpiece. Reverse milling, the cutting thickness from small to large, three blade cutter load from small to large, the tool in the processing more stable. Note that this is only used in the finishing process, or in the roughing or to use the milling, this is because the milling speed of the high productivity, and the three edge cutter life can be guaranteed.

7. Reasonable use of cutting fluid.

Reasonable use of cutting fluid to cool the main effect of the aqueous solution on the cutting force is very small. The lubricating action-based cutting oil can significantly reduce the cutting force. Due to its lubrication, it is possible to reduce the friction between the tool's rake face and the chip and between the flank face and the workpiece transition surface, thereby reducing the tool radial runout.

Practice has proved that as long as the various parts of the machine manufacturing, assembly accuracy, select a reasonable process, tooling, tool radial runout on the workpiece machining accuracy of the impact can be minimized.

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