Natural stone cutting

Stone Processing dominated by flat plate to the plane sheet, cylinder, polyhedron, curved body, carvings and other varieties of stone products development. Traditional processing methods, such as using a chisel and chisel were manually peeling and grinding stone processing, has a long history, but dust and labor-intensive, low efficiency, poor dimensional accuracy and surface quality. From this date the 1970s, have developed a variety of special machinery granite cutting machine, such as diamond wire saw, diamond sawing machine, vertical engraving machine, CNC machining centers, multi-function, its working efficiency greatly exceeds the manual processing, and stone implements industrial mass production.

1. Diamond Sawing Machining

Diamond Cutting Tools: superior cutting performance and wear resistance, is widely used in stone and many other industries, but the higher cost of diamond saw blades, and its direct impact on the life of stone processing costs. Therefore, the correct choice of the blade while cutting should be a reasonable process parameters to improve blade life and cutting efficiency.

(1) diamond saw blade wear

Wear properties of diamond saw blade cutting tool to reflect the performance of the reasonableness of one stone cutting process parameters, can be an important indicator of sawing workability.

A typical diamond wear process: diamond protrusion reach working height, crushing, abrasion binding agent, then a diamond blade, broken grains, grains completely off.

Diamond abrasive wear process, the ongoing micro-crushing, local crushing process makes the continuous generation of new cutting edge, the blade is sharp and cutting state, high cutting efficiency, cutting power consumption is reduced, but the reduced blade life; while diamond continuously polished and polishing the cutting edge will passivate the cutting force increases, reducing the cutting efficiency, and increased service life of the blade.

(2) cutting process parameters

Cutting process parameters, the greatest impact on the saw blade cutting speed and wear properties, it is mainly caused by changes in temperature and mechanical load sawing, resulting in different forms of diamond abrasive wear produced. In the low speed region, the mechanical load plays a major role for the blade to wear, increasing the cutting speed, cutting depth single diamond abrasive grains and the effective cutting area is reduced, so that the mechanical load decreases, the blade radial wear reduction small, diamond shape to wear polished, off the main; area at high speed, mechanical loads and thermal shock loads have a decisive impact on the blade wear, with increasing cutting speeds, thermal load and mechanical load shock effect increases, saws increased pad wear, diamond grit to break form the majority.

Changing the cutting depth and feed rate is mainly caused by changes in mechanical load impact blade wear. Increased cutting depth or feed rate, single diamond abrasive cutting thickness increases, cutting load increases, the blade wear and tear. In addition, increasing the cutting depth, but also to make contact with the rock diamond grit arc length increases, due to friction, wear diamond shape with polished-based, cutting edge becomes dull, so that the load increases cutting, sawing cutting process instability. Cutting rates at the same situation, when using a large cutting depth small feed rate, cutting diamond abrasive relatively reduced thickness, the cutting path length, wear and tear in the form of diamond grit to grind heat load caused mainly the reduction in the number of broken grains; when using small cutting depth, large feed rate. Diamond abrasive cutting thickness increases, the cutting path is short, at this time, in the form of diamond abrasive wear diamond to mechanical loads and shock effect caused by the broken main.

In addition, the shape of the blade itself, such as diameter, number of teeth, width, etc., as well as material selection coolant to the cutting process, such as the stone also has an important impact. Therefore, sawing stone, the need to consider many factors in order to obtain the best cutting results.

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