Polycrystalline diamond (PCD) is widely used in cutting tools and molds due to its high hardness and wear resistance. However, the high manufacturing cost of PCD makes it crucial to maximize the use of PCD Blank in processing. In recent years, fiber laser cutting technology has gradually replaced traditional electrical discharge machining (EDM) due to its high efficiency, low pollution and small thermal deformation.

Principle of Laser Cutting

Laser cutting is based on the high-energy laser beam heating the material locally, causing it to melt or vaporize rapidly, thereby achieving cutting. The non-contact nature of laser cutting reduces the mechanical stress and thermal effects of the workpiece, while its parameter flexibility makes it simple and efficient to process PCD Blanks of different materials and thicknesses.

The basic steps of laser cutting include laser generation, focusing, heating cutting and gas-assisted cutting. In this process, the focusing and energy density of the laser are crucial to the cutting quality.

Advantages of Laser Cutting

Laser cutting has the following advantages over traditional cutting methods:

• High precision: Achieve cutting accuracy of less than 1 mm, which is very suitable for cutting complex shapes.

• Non-contact processing: Reduce mechanical damage and extend the service life of tools and workpieces.

• Processing flexibility: cutting parameters (laser power, speed, etc.) are adjustable and highly adaptable.

Advantages of laser cutting machines

Take the fiber laser cutting machine of TKD CO., Ltd as an example, its advantages include:

• Low noise: low noise during laser processing, in line with environmental protection requirements.

• Small vibration: non-contact processing reduces the impact of vibration and ensures processing stability.

• Environmental protection: no harmful substances are produced during the cutting process, which is more in line with the goal of sustainable development.

• High processing efficiency: laser cutting speed is fast, which can greatly shorten the production cycle.

The influence of process parameters on cutting quality

The quality of laser cutting is affected by multiple process parameters, including:

1. Cutting seam width: the setting of stroke focus, pulse frequency and laser power directly affects the width of the cutting seam. Good focusing can improve cutting accuracy, and appropriate pulse frequency can reduce the cutting seam width.

2. Cutting surface quality: surface roughness is affected by factors such as laser power and cutting speed. Reasonable parameter adjustment helps to achieve a smooth cutting surface.

3. Microcracks: Excessive laser power may lead to thermal stress concentration, resulting in microcracks. When selecting cutting parameters, excessive heat concentration should be avoided.

4. Cutting speed: The cutting speed needs to match the material thickness. Too fast or too slow may affect the cutting quality.

Future development trends

Laser cutting technology has broad prospects in the field of PCD cutting, and the following trends are expected to emerge:

• Intelligent processing: Combine artificial intelligence to automatically adjust cutting parameters and optimize cutting effects.

• New material application: To meet the needs of new composite materials, further improve the efficiency and adaptability of laser cutting.

• Green manufacturing: The environmental protection characteristics of laser cutting will promote wider application.

Conclusion

Laser cutting technology provides an efficient and flexible solution for the processing of PCD Blank. By reasonably selecting laser cutting parameters, material waste can be significantly reduced and product quality can be improved. With the continuous advancement of laser technology, laser cutting will continue to promote the development of high-performance material processing technology.