Influence of graphite dust
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Influence of graphite dust
Graphite is a kind of heterogeneous brittle material with micro defects, which has the characteristics of structural inhomogeneity, porosity and brittleness. Study at home and abroad indicate that the graphite material machining and metal materials are very different: metal material is obtained by the plastic deformation of strip or segmental cutting end material removed; while the graphite material is generated by brittle crack break type of chip or dust to the end.
The use of life has a great influence and machining of the graphite dust on the machine tool and precision. Graphite dust if entering the spindle will clamp instability, shorten tool life, increase processing surface roughness, adding downtime, lower machining precision and scale spindle bearing using life. For the high speed spindle processing base, because of the high speed of spindle, clamping instability will lead to centrifugal force is very large, it will cause the bending strength and crack tolerance of low blade cracking, in addition to a waste, the operator and the machine will bring danger. Machine tools are generally made of transparent materials to cover the processing of the inquiry, if the graphite dust tarnished shield will reduce visibility, affecting the operator vision, constitute an increase in waste. High purity graphite dust not containing silicon carbide, silicon carbide is a high hardness abrasive powder, intrusion machine will aggravate the sliding surface wear, enter the machine feed system will be the formation of screw and linear guide rail wear; and high purity graphite conductive material is outstanding, graphite dust into the data line interface will affect the data transmission. Invasion of CNC system will affect its sensitivity and reliability, more serious will constitute the electrical system of the "short circuit" led to the production.
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