Zirconia Ceramic Grinding Method – Laser Preheating Assisted Grinding

The ductile domain grinding, one of the grinding methods of zirconia ceramics, was introduced above. Next, Pintejin Ceramics Factory will continue to introduce the second grinding method, laser preheat-assisted grinding.

The middle hexagonal dividing line zirconia ceramic has the common characteristics of high hardness, high brittleness and low fracture toughness of ceramic materials, which makes it easy for ceramic materials to produce deformed layers, surface/subsurface microcracks, material powdering, Defects such as fuzzy surfaces, phase transition regions, and residual stress limit the further expansion of the application range of ceramic materials. Ceramic materials, especially those with higher hardness, such as zirconia ceramics, have always been “hard to process”, so that the machining cost of ceramic precision parts accounts for 30%-60% of the cost, and some even as high as 90%. Therefore, it is particularly important to explore precise, efficient and low-cost machining methods for ceramic materials.

Laser preheating-assisted grinding: zirconia, silicon nitride, alumina and other engineering ceramic materials have high strength, wear resistance, and corrosion resistance. The post-machining of their products generally adopts grinding, and the ordinary grinding process has low production efficiency , The cost is high, and it is difficult to process complex shape parts. The heat-assisted cutting technology that has appeared in recent years is an effective method to solve the machining of difficult-to-machine materials. At present, the commonly used heat sources are: plasma arc, oxyacetylene flame and laser, etc.

Compared with other heat sources, the laser spot size is small, the energy density is high, and it has good controllability in energy distribution and time characteristics. Processing has been widely used. Brief description of the laser preheating-assisted grinding process: This method is to focus a laser beam with sufficient energy and irradiate it to the appropriate part of the ceramic material to be processed, and preheat it in a relatively short period of time to make the surface of the ceramic material occur.

Gasification or melting promotes the change of metallographic structure and generates considerable thermal stress, improves the fracture toughness of ceramic materials, and causes the transformation from brittle failure to plastic deformation, thereby realizing the removal of the surface material of the workpiece.Material type Material name

• Engineering ceramics silicon nitride, alumina, zirconia, mullite, etc.
• Metal Tool steel, stainless steel, titanium alloy, titanium, cast iron, etc.
• Composite materials Alumina reinforced aluminum matrix materials, silicon carbide ceramic matrix composite materials, etc.