In the latter part of the last century, all-terrain crane in the European market has become hot situation. However, due to the technical complexity of all-terrain crane, high manufacturing costs, coupled with the key technology of cranes are not even fully grasp all terrain mobile cranes become the elusive field this time, "luxury", R & D personnel we feel unable to start.
At the recent large-scale industrial CCTV broadcast the documentary "weighing big country", the chairman of XCMG king four words to describe the 1990s Chinese civil engineering machinery for the first time to participate in Bauma exhibition in Munich, Germany image: "unkempt", "ragged." The film also records a little story: In a Chinese technician went to a German all-terrain crane manufacturers to learn the process, technical staff asked if the Germans can take pictures, German replied: "You are using a video camera recorded the whole can. "It was kind of conceit and contempt tone makes" cone pain in heart. " This is the story of eight characters, and indeed became a true portrayal of state of the art, but the German's sentence was deeply stimulated the Chinese engineers, prompting Chinese construction machinery enterprises determined to fully develop all-terrain crane.
Because all terrain crane chassis Unlike conventional truck cranes, so the first challenge is to overcome the chassis design techniques, including oil and gas suspension and multi-axle steering the two technologies. The late 1990s, XCMG, Pu Yuan Group (2003 to be acquired by Zoomlion Zoomlion workers from predecessor) send people to study in Germany Liebherr, mergers and acquisitions to buy the whole LTM1025, LTM1032, LTM1050 three models terrain cranes, but did not get specific technical parameter values, but did not get specific design methods and manufacturing processes, coupled with the relationship between the control of oil and gas suspension technology, thermodynamics, vibration, fluid mechanics and other disciplines, the need to combine theory test conducted on materials, technology has its unique requirements, so that R & D engineers again into confusion.
December 10, 2012, in the West Coast Economic Zone, Fuqing City, Fujian Province, 1,200 tons XCMG all terrain crane expedition in carp Wind Power site.
Over the next ten years time, the domestic research joint technical research model has become common practice, researchers colleges Beijing Polytechnic University, Tongji University, Dalian University of Technology, Zhejiang University, Jilin University and other research team set up different, suspension systems for oil and gas nonlinear variable stiffness, vibration damping, damping characteristics, vehicle load and other key research projects, for the birth of the true meaning of all terrain crane foundation.
In 2002, the history of the development of Chinese all terrain crane memorable year. This year's XCMG Xuzhou Heavy foreign technical barriers and to break the blockade, the first to conquer all terrain crane special chassis technology, China's first self-developed 25-ton all terrain crane to announce the birth, which is the development of China all terrain crane Bureau opened a good essay, a landmark significance. Subsequently, XCMG build on the progress, development of better and better, and gradually overcome the multi-axle drive and steering, U-shaped and oval-shaped boom, single-cylinder automatic retractable latch key technologies, technology, ultra-door play, CAN bus control, to name only in four years, they have developed a 50 tons, 125 tons, 130 tons, 160 tons, 200 tons, 240 tons, 300 tons, 400 tons series of all-terrain crane products.
Face of "Big Brother" development speed XCMG, for has gone through imitation, understanding the development stage of Zoomlion, the sense of urgency is growing. Zhang Jianjun told reporters, with the development of automobile cranes decades of accumulation and exploration of all-terrain crane key technology research matures, since 2006, the United Workers from senior determined, must overcome technical bottlenecks, has its own boom , stretching, control, suspension and steering and other five key technologies toward large-tonnage all terrain crane direction. Thus, workers from the United Xiong Yan Ming, general manager personally set up a "large-tonnage project group", a total of 19 individuals, specialize in technical research.
After two years of hard work, all of these breakthrough technologies, developed 90 tons, 120 tons, 150 tons, 180 tons, 220 tons of these five products, the five key technologies into all applications. Proven technically been completely standard. 2008 United Workers from digested five key technologies in support of the Eleventh Five-technology projects, the following year, all of these five technologies embodied in this product above 350 tons, and telescopic steering both technically and a comprehensive upgrade, became one of the most typical products, similar products, this product is scalable shorter, more reliability. 2009, Vanda workers from fully master this technology, based on the five, with further innovation, highlights two telescopic and servo technology. In the telescopic technology, product realization intelligent, telescopic boom much percentage is much, keyboard operation without the need of manual operation; in servo technology, breaking the limit steering ratio control technology equipment to higher precision, steering process faster response time, the technology in the world is leading in the country was the first.