Granite processing technology?

Granite is a kind of high hardness stone, which is difficult to process. In recent 10 years, due to the wide application of synthetic diamond tools, granite processing industry has developed vigorously and formed special technical equipment. I. Processing Methods and Common Equipment The basic methods of granite processing include sawing, grinding and polishing, cutting, chiseling, singeing, auxiliary processing and inspection and repair. 1) sawing is to cut granite blocks into strips or blocks (generally 20mm thick or 10mm thick) or semi-finished products with a stone saw. This process is a rough machining process, which has great influence on the yield, plate quality and economic benefits of enterprises. The common equipment for sawing is a large frame automatic sanding saw specially used for granite. Multi-blade bidirectional cutting machine; Multi-blade computer controlled granite cutting machine and granite circular saw. 2) The purpose of grinding and polishing is to further process the sawed rough board to make its thickness, flatness and gloss meet the requirements. This process needs to be completed in several steps. First, rough grinding and leveling are needed, and then gradually through semi-fine grinding, fine grinding and polishing, the original color, pattern and luster of granite are fully displayed, and the best decorative effect is achieved. Commonly used equipments include: automatic multi-head continuous grinder, diamond leveler, bridge grinder, disc grinder, reverse rough grinder and manual grinder. 3) The cutting process is to shape and cut the blank plate or polishing plate according to the required specifications and sizes with a cutting machine. The commonly used cutting equipment includes longitudinal multi-cutter cutting machine, transverse cutting machine, bridge cutting machine, cantilever cutting machine and manual cutting machine. 4) Rough machining is a traditional machining method. The blank is machined into the required product by means of wedging, rough machining, chopping, repairing and polishing, and its surface can be rock surface, mesh surface, hammered surface or glossy surface. Common hand tools, such as hammer, chopping axe, chisel, chisel. Some processing procedures can use stone chipper, planer, automatic hammer chisel, automatic sandblasting machine, etc. 5) singeing, also known as spray-burning, uses the difference of thermal expansion coefficients of different mineral particles that make up granite to make some particles on its surface expand and fall off by flame spray-burning, forming rough decorative patterns with ups and downs. This rough granite plate is suitable for non-slip floor and outdoor wall decoration. The commonly used equipment is granite automatic singeing machine. 6) Auxiliary processing refers to grinding, chamfering, drilling, grooving and edging the cut and polished stone as required. Commonly used equipment includes automatic chamfering machine, copying milling machine, thin-wall drilling machine, hand-held diamond circular saw, hand-held polishing machine and so on. 7) Check and repair, cracks and holes will inevitably appear in natural granite, and small defects may appear during processing. Genuine products are put into storage after cleaning, inspection and drying, and those with slight defects can be bonded and repaired to reduce the rejection rate. This process is usually manual, and automatic continuous purging is used to repair the air dryer in the advanced processing line. Second, the processing technology There are four main types of production lines for granite processing: standard plate production line, thin plate production line, rough decorative plate production line and special-shaped plate production line. 1. The processing technology of granite standard plate is that the raw materials are loaded into the raw material truck by crane, sent to the frame-type sand saw by car ferry to be sawed into rough plates, then sent to the processes of grinding, polishing and cutting to be processed into smooth plates, and finally inspected, packaged and put into storage. The specific process is as follows: raw material hoisting → sawing → cleaning and inspection → rough grinding → fine grinding → fine grinding → polishing → cutting and repairing → inspection and packaging. 2. Granite plate processing process Granite plate processing is an automatic processing line, and each process is connected by raceway, unloader and turnover machine. The technological process is as follows: lifting raw materials → sawing into thin plates → cutting → grinding and polishing → cutting → edging, chamfering, milling groove repair, cleaning and drying → inspection and packaging. 3. Processing flow of granite rough decorative board The granite semi-finished rough board is sent to the automatic roughing machine through the raceway (the cutter head is selected according to the required pattern thickness), and the cutter head chisels out various required rough decorative patterns according to the predetermined trajectory. If you need a singeing, send it to the automatic singeing machine. The technological process is as follows: semi-finished blank plate → chiseling or singeing → cutting → inspection and packaging. 4. Processing technology of special-shaped plate According to the special requirements of users for the shape and specifications of granite plates, design and manufacture templates, such as round and oval desktops, oval hole dressing tables, flower windows, etc. Then, according to the template shape (or microcomputer preset program), use copying milling machine to process the required shape on the semi-finished plate. The technological process is as follows: semi-finished plate → trimming → special-shaped milling → drilling → edge grinding and chamfering → inspection and packaging.

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