Dongyouda linear module manufacturer briefly describes the techniques for coarse adjustment of steel rails.

Machine tools are a crucial part of enterprise production, greatly contributing to output. However, they also suffer from high wear and tear, making their lifespan a major concern for businesses. According to reliable statistics, my country currently has over 2.8 million automated machine tools, the vast majority of which are old equipment. These inoperable linear slide modules and production lines represent a burden for enterprises, but also a significant resource reserve; repairing them would be a valuable asset. By identifying the technical challenges and addressing bottlenecks, it's possible to reduce investment and maximize production capacity, thereby maximizing economic and social benefits, creating greater value for enterprises, and driving rapid market development. Over 60% of machine tools in China are over 10 years old; linear slide module equipment and production lines are no longer functioning properly, some even paralyzed. Servo electric cylinders are impacting company profits, further plunging companies into difficulties. We have learned that some equipment and production lines imported from abroad have not been well assimilated, resulting in incomplete spare parts and improper maintenance, leading to malfunctions during operation. In some cases, the focus was only on importing the equipment, instruments, and production lines, neglecting the management and control of software, skills, and processes, resulting in incomplete projects and equipment failing to perform optimally. Compared to Europe and America, which have well-established solutions and mechanisms for older machine tools, utilizing linear slide modules to upgrade automated machine tools, we believe that following this approach can significantly benefit my country's manufacturing industry, offering substantial improvements in cost, profit, quality, and precision. The sliding friction coefficient of rolling linear guides is f = 0.003–0.004, while traditional plastic-coated guides have f = 0.04, and cast iron guides have f = 0.12. Therefore, the frictional resistance of rolling linear guides is less than one-thirtieth of that of traditional guides. Taking rolling linear guides as an example, a small feed force is enough to drive the slide, and the movement is smooth and stable. If the rigidity of the feed system is poor, it can easily cause the slide to crawl or swerve. This crawling is different from traditional crawling; it is not caused by friction on the guide surface, but by the poor rigidity of the system feed. Therefore, the solution will also be different, and the stability of the system should be improved. When the feed system is driven by a hydraulic cylinder, the piston in the cylinder is affected by the fluctuation of the sealing ring and the oil in the mounting groove, and the piston's crawling is affected by the crawling of the slide. General solutions: select sealing rings with low friction coefficient and good sealing performance, and linear module manufacturers should strictly control the groove size tolerance and surface roughness of the machined surface. Single-axis arm rolling linear guides are common components in the mechanical industry, and their quality directly affects the precision and service life of mechanical equipment. Therefore, the guides are required to have high wear resistance and stability. Although ion nitriding guides can achieve high hardness and wear resistance, the large deformation caused by nitriding limits the availability of ion nitriding products. Precision linear guides are ultra-thin and ultra-lightweight linear guides. Precision linear guides are ideal for precision measuring instruments, semiconductor manufacturing and inspection equipment, and other applications where precise linear motion is crucial. For coarse adjustment of the rails, we generally use the wire pulling method. A slider is placed on the rail, and a graduated microscope is mounted on the slider of a perpendicular robotic arm. The microscope lens is aligned with a 0.3mm diameter steel wire, and the lens is placed vertically. The steel wire is fixed at one end of the rail, and a weight is suspended from the other end via a pulley. Then, the two ends of the steel wire are adjusted so that when the microscope is at either end of the rail, the steel wire coincides with the graduated line on the lens. The steel wire becomes an ideal straight line in the horizontal plane. Moving the slider checks the straightness at any position on the rail, adjusting the rail to within a 0.3mm range of straightness in the horizontal plane. Then, a fitting method is used to install the precision guide, facilitating further adjustments.