General carbon graphite material production procedures Carbon graphite materials can be processed dry and wet with ordinary machine tools. But in order to maintain its purity, high-purity graphite is usually processed dry. For grinding and grinding ordinary graphite, wet processing is often used. Try to avoid switching between dry and wet processing on the same machine.
When dry processing is used for dust removal, dust removal devices should be installed on all machines. Except for large graphite processing workshops, there is no need to install central dust removal equipment. If the workshop is mainly used for processing metal, it is necessary to install tool vacuum cleaners on each machine (vacuum 300mm water head or air flow speed of 18 meters/second) and should be covered with lubricated polished surfaces or guide surfaces.
Cutting carbon can be cut with a bronze base diamond grinding wheel with a grinding wheel thickness of 200-300mm and a linear speed of 50-60 meters/second. Graphite can be cut with a tool steel coarse-tooth band saw (5 teeth/inch) with a cutting speed of 300-600 meters/minute.
The turned workpiece should be placed in a spring clamp or with an expansion ring as much as possible. Judging from the ceramic properties of graphite, the clamping pressure should be dispersed over as large an area as possible. In principle, KO1, K05 and K10 carbide inserts can be used. If the required tolerance is lower than 1T7, it is recommended to use diamond tools. By using rounded corners or corner chamfers on the tool edge, the joint chipping can be reduced.
Milling Milling typically uses carbide and diamond tools. The back angle should be no less than 10 degrees. Using diamond cutting tools for processing, the cutting speed can be increased by 50%.
Grinding carbon graphite materials can be performed. The grinding wheel density should be between 6-9. When high-precision surface treatment is required, honing, grinding and polishing processes must be adopted. Graphite is a bonding material that can be bonded with polyester, double oxygen resin, alumina bonded under high temperature conditions, or alumina or zirconia-based ceramic adhesive.