Development course of water cutting

Dr Norman Franz has always been regarded as the father of water knives. He was the first person to study ultra-high pressure (UHP) water jet cutting tools. Ultra-high pressure is defined as higher than 30000 psi. Dr Franz is a forestry engineer. He wants to find a new way to cut the trunk into wood. 1950, Franz placed a heavy object on the water column for the first time, forcing the water to pass through a small nozzle. He obtained a short high-pressure jet (many times higher than the current pressure) and was able to cut wood and other materials. His later research involved more continuous water flow, but he found it difficult to obtain continuous high pressure. At the same time, the life of parts is also measured in minutes, not weeks or months today.

Dr Franz has never made a mass-produced lumberjack. Today, wood cutting is one of the least important applications of ultra-high pressure technology. But Dr. Franz proved that the high-speed convergence of water has great cutting energy-the application of this energy far exceeds Dr. Franz's dream. From 65438 to 0979, Dr. Mohammad Hashish worked in Fulu Laboratory and began to study ways to increase the cutting energy of water jet cutting metals and other hard materials. Dr Hashish is recognized as the father of Gaza Water Knife, and he invented the method of ordinary water knife Gaza. He used garnet (a commonly used material in sandpaper) as sand material. In this way, water jet (containing sand) can cut almost any material. 1980, the sand-adding water knife was first used to cut metal, glass and concrete. 1983, the world's first commercial abrasive water jet cutting system came out and was used to cut automobile glass. The first users of this technology were the aerospace industry, who found that water jet was an ideal tool for cutting stainless steel, titanium, high-strength lightweight synthetic materials and carbon fiber composite materials used in military aircraft (already used in civil aircraft). Since then, sand-adding water knives have been adopted by many other industries, such as processing plants, stone, ceramic tiles, glass, jet engines, construction, nuclear industry, shipyards and so on. The development achievements of the country/personage during the development of water cutting technology "the father of water knives" —— Dr. —— Norman Franz 1 1936 American and former Soviet engineers pressurized water to form high-pressure water jets; Coal mining and high-energy water mining; In 2 1950, Dr. Norman Franz placed a heavy object on the water column, forcing the water to flow out from a very small nozzle, and obtained a short-time water jet to cut wood and other materials; It is proved that the high-speed converging water flow has great cutting energy; 3 1956 The water-bearing cutting pressure of the former Soviet Union reached 200MPa；; Rock can be cut by water; "The Father of Water Knife with Sand"-Dr. Muhammad Hash 4 1979 Dr. Muhammad Hashi studied the method of increasing the cutting energy of water knives, that is, adding sand to water knives; Water knife and sand can cut almost any object; 5 1980 Dr. Mohammed Hashish's sand water knife was first used to cut metal, glass and concrete; Can cut metal, glass and other materials; 6 1983 The first commercial sand-adding water knife cutting system in the United States came out. Suitable for cutting automobile glass; -The introduction of water cutting technology opened a revolution of new cutting technology -7 1996 Nanjing Dida Water Knife The first domestic water knife was successfully developed; The operating pressure is about 220Mpa；; In 2003, the first robot water knife of Nanjing Dida Water Knife was successfully developed. Numerical control robots are used in the field of water cutting; Up to now, China, the United States, German, Italian and Russian have broken through the ultra-high pressure water cutting technology, and the highest pressure can reach 550Mpa；. Ultra-high pressure water cutting technology has been widely used; -The research and development of water cutting technology in various countries is close to maturity, and the application scope of water cutting technology is further expanded-the main domestic water knife manufacturers-American Fulu Water Knife, Nanjing Dida Water Knife, Nanjing Olga Water Knife, Altorf Water Knife, Jiangsu Sharp Water Knife, Nanjing Su Qi Water Knife, Huai 'an General Water Knife, Shanghai Golden Arrow Water Knife, Shanghai Ximeiteng Water Knife, Zhejiang Hongri Water Knife and Jiangsu Xusheng Water Knife.

Domestic enterprises that can provide large-scale water jet cutting include Shanghai Xinwei Machinery (3m×6m super-large table), Shanghai Wei Yao, Jiangsu Shengteng, etc. At the beginning of the 20th century, the research of low-pressure water jet technology in foreign water cutting research laboratories entered a preliminary stage. Break the traditional understanding of water cutting technology; In 2003, the low-pressure water jet technology of Ruixun Security Special Technology Development Co., Ltd. began the research stage in the laboratory; The basic principle of portable water cutting technology is developed. In 2005, the low-pressure water jet technology of Ruixun Security Special Technology Development Co., Ltd. began to be tested in the laboratory; The trial cutting of 10mm steel plate was successful. In 2009, Ruixun Security Special Technology Development Co., Ltd. applied for the patent registration of portable water cutting technology and passed it; The prototype of the product has been formed and can realize the cutting function; In 2009, the basic principle of portable water cutting system equipment of Ruixun Security Special Technology Development Co., Ltd. was mature and the product was formed; The medium and low pressure water jet cutting technology has entered the practical application stage; In 2009, the first portable water cutting system equipment of Ruixun Security Special Technology Development Co., Ltd. came out; It marks that the medium and low pressure water jet technology has entered the commercialization stage; Up to now, the portable water cutting system of Ruixun Security Special Technology Development Co., Ltd. has entered the stage of commercial development; Used in the fields of police explosive disposal and petrochemical industry; Portable water cutting system is a new type of water cutting equipment with the characteristics of small size, light weight, convenient transportation and high cutting efficiency. Steel plates, ceramics, marble and cement products can all be cut with low water pressure. Therefore, the invention has a broad market application prospect and can meet the different requirements of customers for cutting ability and working environment. In the past market application, the portable water cutting system showed excellent use effect. Mainly used for bomb destruction, petrochemical pipeline cutting, dangerous goods handling, flammable and explosive cutting. The application effect is obvious, and the potential safety hazard in the cutting process is easily eliminated, making it the first choice for bomb destruction, petrochemical pipeline cutting, oil tank cutting and oil tanker drilling.