The Center Height Of PCD Tool And Its Influence On Machining

ZY SUPER HARD TOOLS introduces the center height of PCD tool and its influence on machining as follows,

1. What is the center height of the tool

The center height of the tool refers to the distance between the center line of the tool spindle and the machining surface, also known as the height of the tool tip. It is one of the reference parameters of tool installation, which has an important impact on machining quality, accuracy and efficiency.

2. The impact of high tool center on processing

2-1. Machining accuracy:

The center height of the tool will affect the surface topography of the work piece processed, if the center height of the tool is not correct, it will cause the surface of the work piece to be uneven and the roughness will increase. Therefore, it is necessary to confirm whether the center height of the tool is correct before machining to ensure the machining accuracy.

2-2. Cutting force:

Cutting force refers to the force of the tool on the work piece in the cutting process, and the change of the center height of the tool has an obvious effect on the cutting force. When the tool center height increases, the cutting force will also increase. Therefore, when cutting, it is necessary to pay attention to the selection of the tool center height to reduce the impact of the tool on the work piece.

2-3. Tool life:

Tool life is also affected by the high tool center. If the tool center height is too high, it will make the tool withstand greater cutting force, resulting in increased tool wear and shortened life. Therefore, it is necessary to choose the appropriate center height when using the tool to extend the service life of the tool.

3. How to measure the center height of the tool

3-1. Appearance method:

The appearance method is a simple and easy way to determine the center height of the tool by a simple visual inspection. Install the tool on the spindle, adjust the position of the tool, and visually check whether the tool is parallel to the machining surface.

3-2. Altimeter measurement method:

Altimeter measurement is a more accurate method that requires the use of specific altimeter instruments. The height measuring instrument is installed on the machining platform, and the measuring head is placed on the surface of the tool, and the value of the center height of the tool is measured by adjusting the instrument.

4.The reason for the high tool center

4-1. Tool wear: 

Tool wear is one of the main factors leading to high tool center. In the machining process, due to the action of cutting force, the tool surface will continue to wear, resulting in the center of the tool position offset, thus affecting the machining accuracy of the workpiece.

4-2. Improper tool installation: 

Improper tool installation can also lead to high tool center. If the clamping force is not uniform or the clamping is not tight, the tool will have unstable vibration during processing, so that the center position of the tool is offset.

4-3. The use of cutting fluid in the processing process: 

Improper use of cutting fluid will cause the cutting temperature to be too high, so that the tool deformation, or even break, resulting in the center of the tool offset.

5.The impact of the tool center height on the work-piece

5-1. Machining accuracy decline: 

High tool center will make the direction of the cutting force change, resulting in a decrease in work-piece machining accuracy. For example, after the work-piece size is set on the CNC machine tool, the size of the work-piece after processing is inconsistent with the set value due to the existence of the high tool center.

5-2. Poor surface quality: 

The high center of the tool will lead to an increase in vibration during the cutting process, which will cause surface defects such as scratches and burrs on the surface of the work-piece, affecting the surface quality of the work-piece.

6.The solution of high tool center

6-1. Replace the tool: 

When the tool wear is found to be serious, the tool should be replaced in time to ensure that the center position of the tool is accurate.

6-2. Pay attention to the installation of the tool: 

When installing the tool, attention should be paid to the uniformity of the clamping force and the tightness of the clamping, so that the tool installation is stable and stable.

6-3. Rational use of cutting fluid: 

In the processing process, the appropriate cutting fluid should be selected according to the material and cutting conditions of the work-piece, to ensure the cooling and lubrication of the tool and the work-piece surface, and to reduce the cutting temperature is too high.

7. Conclusion

This paper introduces the center height of the tool and its influence on machining, points out the influence of the center height of the tool on machining precision, cutting force, tool life and other parameters, and introduces two methods of measuring the center height of the tool. In processing, choosing the right tool center height can effectively improve the processing quality and efficiency.

Tool center height is a key factor to be paid attention to during work-piece machining. Failure to find and solve the problem of high tool center in time will lead to poor machining accuracy and surface quality of the work piece. Only by carefully checking the wear of the tool, paying attention to the installation of the tool and the reasonable use of cutting fluid can we ensure that the center position of the tool is accurate, so as to ensure the quality of the work piece processing.