Mechanical cutting glass
Mechanical cutting glass utilizes the mechanical properties of glass with low tensile stress. Generally, diamonds or corundum is used to apply scratches on the surface, and the stressed part is cut off due to tensile stress.
(1) When a glass knife cuts glass that is not too thick, a diamond glass cutter set with diamond at the end of the brass is used to cut ordinary flat glass, often using a superhard knife wheel. In addition, kerosene and other liquids are added when cutting, which has a good protective effect on the incision and tool life. In addition, thin leaded soft glass tubes are also cut with a guillotine knife.
(2) Diamond saws Cutting diamond saws is not limited to glass, but is also widely used in the cutting of silicon, silicon, ceramics, and crystals. The diamond saw has a higher cutting efficiency than the added abrasive or ordinary wheel saw. The cutting fluid is generally used for cutting. The bonding material of the diamond saw is metal, thermosetting resin, ceramic, etc., but generally the metal saw such as brass is used, and the thickness of the saw blade is about 0.2 to 7 mm. The cutting method is divided into cylindrical cutting, internal circular cutting, and band saw cutting according to the purpose.
a. Cylindrical cutting Glass Cylindrical cutting is the most widely used and efficient cutting method. The circumferential speed is 1500~2500r/rain, and the thickness of the saw blade is 1/150 of the diameter. If it is too thin, the rigidity is insufficient and the cutting accuracy is reduced. The classification includes: the most widely used, uniform cylindrical type with a continuous edge for high accuracy; suitable for cutting relatively large products, because there is a groove, the slurry can be well penetrated, and is conducive to chipping Excluded, can withstand the rough fissions of the mosaic type; suitable for cutting large products, cutting precision, sharpness are low blade type.
b. The thickness of the inner circle cutting blade is 1/150 of the outer diameter, and thinness is difficult. However, because the inner circle cutting blade receives the tension of the outer circle, the deformation of the blade can be suppressed and the thickness of the blade can be very thin. Internal-circular cutting is better than slicing silicon and silicon. It is used to cut glass rods. It is rarely skewed. The parallelism and flatness of the cutting surface are very high. Therefore, the internal circular cutting can cut very thin sections.
c. Band saw diamond saws Circular saws cannot cut large products, but band saws can cut them. The band saw has two kinds of circulation type and reciprocating type, originally used for marble cutting.
(3) Cutting glass with abrasives
a. The original plate saw with a diameter of 95300-400mm, a circular plate made of brass or iron plate with a thickness of 1 to 2 mm, and rotating it, while injecting an abrasive mixture of abrasive (silicon carbide, corundum, corundum, etc.) and water, Push the glass to the circular saw and cut it with a certain force.
b. It is difficult to cut out ultra-thin products by using common grinding wheels for cutting ordinary grinding wheels and diamond grinding wheels. The cutting loss is large and the grinding wheels wear badly. However, the grinding wheels are inexpensive, especially when dry cutting, the ordinary grinding wheels have the advantage of cutting.
c. With a multi-cut wire for wire multi-cutting (tungsten or piano wire, 0.5 to 0.2 mm), about 100 sheets can be cut at the same time. Grinding and cutting are performed while applying a certain pressure to the processed material with a slurry abrasive. Because it is a grinding cut, the margin is very small and high-precision cutting can be achieved.
d. The principle of grind-jet processing is the same as that of sand-blasting, but using a micro-powder (average particle diameter of 27 cm 2 ), with tiny nozzles (injected gas is carbon dioxide, nitrogen, and compressed air), fine holes are made, and the glass plate is cut. . Abrasive impact force is very small, so it will not break the glass. This method can process very thin glass plates.