Know "Parallel machine tools"

Parallel machine tools (also called virtual axis machines) are quoted from the mechanical mechanics principle. Institutions divide institutions into series and parallel mechanisms. The typical representative of series mechanisms is robots. The layout of traditional machine tools is actually a series mechanism.

In theory, the series mechanism has the characteristics of large working range and good flexibility, but it has low precision and poor rigidity. As a machine tool, in order to improve the accuracy and rigidity, it is necessary to make the bed body and guide rails large and thick, resulting in a range of activities. And the decline in flexible performance.

In order to solve these contradictions, after the 1980s, a large number of scholars began to devote themselves to the research of parallel institutions and proposed the concept of parallel machine tools. The typical representative of a parallel machine tool is the Stewart platform structure, which is composed of six retractable rods and a movable platform, which can achieve high dynamic characteristics, but the working range is small. To solve this problem, the researchers combined the parallel mechanism with the series mechanism to achieve high dynamic performance and a large working space. The typical representative is the Tricepts machine tool of NOUSE, Sweden.

After the 1994 Chicago International Machine Tool Exhibition, many universities and companies joined the research and development of parallel machine tools, such as Giddings & Lewis, Ingersold, Hexel, Siemens, Mikromant, Toshiba, and Toyota. Hitachi, Mitsubishi, Lapic, Russia, etc. At the time, the best tool for parallel machines in the world was the NOUSE company in Sweden. By 2003, the company had sold more than 300 units.

After 1994, universities, scientific research institutes and enterprises in China also carried out research work on parallel machine tools, mainly including parallel machining centers for processing blades jointly developed by Harbin Institute of Technology and Harbin Group. This project won the 2005 scientific and technological progress in China's machinery industry. Awards; Tsinghua University and Qiqihar Second Machine Tool Group jointly developed a gantry hybrid machine tool for processing turbine blades, in addition to Tianjin University, Yanshan University, Shenyang Institute of Automation, Chinese Academy of Aeronautics and Astronautics, Northeastern University, Beijing Institute of Technology, etc. Both have also carried out research and development of parallel machine tools and achieved certain results.

In 2004, Mr. Keller Newman, former president of NOUSE, established a new EXECON company with his former chief designer, launched a new type of parallel machine tool, and committed to the promotion of the technology in the form of issuing production licenses around the world. jobs.