Diamond wire saw machines cut through hard materials like granite through a combination of grinding, friction, and abrasion using diamond particles embedded in a steel wire. Here's a detailed explanation of the process:
Cutting Principle: The diamond wire saw operates by using a metal wire that is embedded with diamond particles as a cutting tool. These diamond particles are evenly distributed along the metal wire, which is formed by binding a series of metal wires with rubber or plastic material. The hardness and sharpness of the diamond particles allow them to grind and wear the surface of the material to achieve the purpose of cutting.
Mechanism of Cutting: During the cutting process, the diamond wire, which is pre-tensioned, is pulled across the stone block at a linear speed of between 24 and 30 m/s, and simultaneously lowered at a down-feed rate tailored to meet the optimum combination of productivity and wire life. The more difficult the stone to cut, the lower the down-feed rate. The cutting action consists of the diamond-impregnated beads mounted on a galvanized steel rope, which grind and wear the surface of the material to achieve the purpose of cutting.
Diamond Beads: The wire saw contains diamond-impregnated beads mounted on a galvanized steel rope. These beads are responsible for the actual cutting. The vast majority of multi-diamond wire (MDW) machines use beads that are 6.3–8.3 mm in diameter, although wires as small as 4.3 mm in diameter have been targeted to minimize kerf widths and maximize the yield of slabs per block.
Cutting Forces and Pressures: Forces and pressures acting on diamond beads are significantly lower compared to circular sawing. The operating conditions encountered by diamond crystals in wire sawing are milder when judged by maximum chip thickness, which means that more irregular and friable crystals are preferred for the process.
Advantages Over Traditional Methods: Diamond wire saws offer higher cutting precision, better surface quality, reduced dust, and lower noise levels compared to traditional methods like blasting and conventional sawing. They provide stable cutting trajectories, producing smooth and flat cutting surfaces, which reduces the time and material waste associated with secondary processing.
Environmental and Safety Benefits: The cutting process with diamond wire saws generates less dust and noise, reducing the impact on the environment and operators. There is no blasting involved, reducing safety risks and environmental damage associated with blasting.
In summary, diamond wire saw machines cut through hard materials like granite by utilizing the extreme hardness of diamond particles to grind and abrade the material's surface, achieving a clean and precise cut with minimal waste and environmental impact.
