As the world's largest consumer of machine tools, China has developed into a pillar industry. Due to
the development of the automotive industry, new and higher requirements have been placed on the
speed and efficiency of machine tools. It is understood that the numerical control rate of Chinese
machine tools is developing rapidly. The numerical control rate of Japanese machine tools has increased
from 40% at the beginning to 90% at present. It takes about 15 years. From the perspective of China's
current development speed, it is estimated that it will not cost so much if it is to reach the current level
in Japan. The time to improve the performance and quality of CNC machine tool components has
become a top priority for the development of China's machine tool industry.
In order to achieve high performance, the ratio of the high-precision ball screw used in the drive of the
machine tool produced in China has been greatly improved. At present, the ball screw used in the
machine tool has low-cost domestically produced products, and also has imported products such as
Japan and Europe with high precision. The use of imported products is often in machine tools that have
high requirements for processing speed, accuracy, longevity and stability.
As the speed of the machine increases, the use of the guide rails is also converted from sliding to
rolling. In China, the use of sliding guide rails is still the majority due to the low speed of the machine
tool and the manufacturing cost, but the number of machine tools using ball guides and roller guides is
rising rapidly. Since the rolling guide has the advantages of high speed, long life, preloading, and
convenient installation, with the improvement of machine tool performance and numerical control
requirements, the increase of the use ratio of the rolling guide is an inevitable trend. (The moving speed
of the machining center of the JIMT exhibition from 1996 to 2002 The number of units displayed on the
left vertical axis and the moving speed of the horizontal axis machine tool) To improve the production
efficiency of the machine tool, it is necessary to increase the speed of the machine tool.
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