Grinding is known to mankind since ancient times an ancient technique, Paleolithic, polished stone tools made using this technique. Later, with the use of metal utensils, and promote the development of grinding technology. But the press, devised a veritable modern grinding machine or thing, even in the early 19th century, it still is a natural by rotating grindstone, make contact processing objects grinding. The first grinder (1864) 1864, the United States made the world's first grinder, which is a device in the lathe turret installed on the wheel slide plate, and it has an automatic transmission. After 12 years, the United States, Brown invented the modern grinder nearly universal grinder. Artificial grindstone - Wheel of Birth (1892) artificial grindstone demand will rise. How to develop a more wear resistant than natural grindstone grindstone it? 1892, American Acheson successful trial with coke and sand made of silicon carbide, which is now known as a man-grindstone C abrasive; two years later, as the main component alumina abrasive and A Trial success, so grinder will get a wider range of applications. Later, due to the bearings, further improve the rail portion of the increasingly high precision grinding machines, and the development of the professional direction, there has been internal grinder, surface grinder, roll grinders, gear grinders, universal grinders and so on. Many types of machine tools. For example: General Machine: Turning poster press, planer, milling machines, presses, grinders, EDM machine tools, WEDM, drilling, boring, hobbing machine, Riveting, bending machines. Dedicated machine: specialize thread rolling machine, upsetting machine; special crankshaft grinding crankshaft grinding. Each machine is divided into many forms and models. For example, the cutting line on the first floor include: DK7720 WEDM hand press, DK7763B, D EDM, DK77 series WEDM standard friction press, DK77 Series CNC Wire EDM, DK Series CNC EDM wire cutting machine tools, GS EDM CNC system Qingdao Chen Hua Machinery Co., Ltd. is an emerging dynamic enterprises Group (features: Qingdao Licang southeast canal foundry, Chen Hua factory model, rubber mold factory, welding sheet metal stamping plant, machining plant, equipment manufacturing plant, bronze handicraft factory two joint ventures). It has a staff of 70, two senior economist, a senior accountant, senior engineer 5, 16 engineers, technicians and 18; has an experienced, high-level technical workers. Strong technical force, and through the ISO9000 series of quality certification to the quality assurance system and advanced detection facilities. Pneumatic presses, presses, Chen Hua Machinery (Views) provided by the China Machinery Equipment Co., Ltd. Qingdao Chen. Qingdao Chen Hua Machinery Co., Ltd. (www.qdchenhua.com) is a professional "press, harbor bollards, adjustable multi-axis tapping drilling machine, CNC multi-axis drilling, gantry milling" of the company. Since its inception, we adhere to the "good faith, sound management" approach, the courage to participate in healthy competition in the market, so that the "Chen Hua machinery, Qingdao, Chen Hua" brand has a good reputation. We adhere to the "service first, customer first" principle, so Chen Hua Machinery won the trust of customers in all CNC machine tools, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!