What are the precautions for installing a CNC knife?

2019-06-01 10:24:18

For carbide tools, if the tool is not installed correctly, it is easy to cause tool chipping, workpiece damage, and even machine damage.

For the cutting knife, if the tool is not installed properly, it is not perpendicular to the workpiece or the cutting edge is higher than the center axis of the workpiece, it will have a great influence on the tool life and the cutting effect. If the problem is serious, even the tool may break and break. Therefore, in order to ensure the cutting effect of the tool, the user should follow a basic installation principle.

1. For the locking parts to be clean, and at the same time, the cutting tool is installed on the hexagonal brick tower, and the tool deviation is measured by the measuring tool indicating table, and the deviation is not more than 1 mm.

2. Check whether the tool is installed vertically by checking the generated chips. If the cut waste is filament-like flow to one side, the installation of the tool is problematic. If the rounded corner of the cutting blade wears out in advance, it means that the blade is installed incorrectly, and one side of the blade is subjected to more pressure than the other side.

3. Due to the fragility of the tool itself, slight tool collisions can cause tool deviation. Therefore, after installation, it is necessary to check the cutting conditions of the tool from time to time to help identify and prevent tool failure.

4. When installing the tool, one of the main considerations is the position of the cutting edge and the workpiece axis. If the blade is installed incorrectly, it will cause a series of problems, such as fast tool wear, tool failure, and poor cutting results. These problems will continue to deteriorate as the actual condition of the cutting edge is found to be difficult, and on some older machine tools, these phenomena occur from time to time.

Most carbide inserts need to be mounted slightly above the center axis of the workpiece during installation, which helps ensure that the insert can be safely and securely attached to the shank when welding the chip breaker.

5. If the blade is mounted slightly above the center, the tangential force during cutting will act on the larger blade area. This operation will increase the tool strength so that the blade can be firmly fixed in the sipe. in.

6. When the blade is installed below the centerline, the most serious consequence is that the blade is pulled out. When the blade contacts the integral bar, the rotation of the workpiece will pull the blade out of the slot; when the residual burr on the workpiece accumulates on the cutting edge, the workpiece will continue to rotate, then the blade will be pulled out of the slot .

When this condition is not detected in time, it will cause the tool holder to be damaged while continuing to process, and it may also cause the machine tool and the workpiece to be damaged at the same time. Even if the luckful blade is not pulled out of the toolholder, the burrs that rotate at the top of the cutting edge can cause damage to the tool.

7. The combination of the blade and the blade should be designed to allow the waste to be discharged smoothly. If the debris accumulates and enters the tank before the workpiece is cut, the blade is most likely to cut the scrap again. If the scrap and the blade produce severe friction, a large amount of heat will be generated, resulting in excessive fatigue and accelerated failure.

For the insert, its geometry and the type of tool holder have an effect on the center height. For blades with a width greater than 0.5 mm, the following formula is useful for determining the maximum center height: center height = 0.8 mm x width + 0.025 mm.

8. When cutting the machining operation, make sure that the cutting edge is installed slightly above the center. For those who use high-speed steel cutting knives, their experience is that these props are better than the center height, but as the development of technology proves that working below the center height will make the cutting operation more difficult.