At present, the production methods and management concepts of China's machine tool industry are lagging behind. Enterprises lack the motivation and conditions to develop the informationization of production and manufacturing links, which makes the integration level of manufacturing links become the bottleneck for machine tool companies to increase production efficiency and product quality.
According to the evaluation results of the two integrations, the situation of single application of information technology in the machine tool industry is better overall, and the information integration application also has a certain scale and level. However, the level of integrated integration, collaboration and innovation between information systems needs to be improved. Among them, due to the relatively late start-up, lack of basic investment, and unregulated management, it is more difficult for smaller companies to achieve integrated integration and collaboration and innovation.
Lack of information systems adapted to the needs of the industry. The information system is the foundation for the integration of the two companies. At present, there is a lack of information systems that are more suitable for machine tool companies in the market, making the integration of the two systems work harder and harder to achieve the desired goals. The industry standard lags behind and the degree of integration of the two standards is insufficient. The information-based construction standards for the machine tool industry are of great significance to the industry enterprises' specification and in-depth implementation of the integration of the two.
At present, there is a growing demand for the introduction of unified standards and specifications in the industry in China. The lack of applicable fusion standards for the machine tool industry has led machine tool companies to adopt different modeling standards and business process specifications in single system applications, making data exchange, convergence, and collaborative integration difficult.
The solid collar needle roller bearing has compactstructure, small radial size and large load carrying capacity. It is suitable for the parts of which the radialoverall size is limited. It is also wide applied to thesituation where the shaft or housing has the swinging motion.In general, the needle roller bearing only withstands theradial load, not the axial load. When the shaft has axial load, itcan be used in combination with other bearings.However, it does not limit the axial shift of shaft or housing.The limiting rotational speed of needle roller bearing is lower.In high rotational speed of main machine, the needle rollerbearing with cage shall be chosen as far as possible.In compassion with other types of Needle Roller Bearings, under the situation of same radial size, the needle roller bearing has the large load carrying capacity and high rigidity but has highfriction torque.This kind of bearing has many series with different structure
and size. It is requested that the hardness, processing accuracy and surface roughness of shaft journal surface and
rolling surface of outer housing be same as those of the collarof bearing. As for the needle roller with G2 class, the diameter varies within 2μm in group. Except the full complement needle Roller Bearings, they have the rigid cages, which can correctly guide the parallel axis line of needle roller.
Solid Collar Needle Roller Bearings
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Ningbo Ritbearing Imp & Exp Co.,Ltd. , http://www.ritbearingchina.com