With the increase in machine speed, the use of guide rails is also transformed from sliding to rolling. To improve the productivity of machine tools, we must improve the speed of machine tools. As a result, the demand for high-speed ball screws and linear guides is rapidly increasing.
1. high-speed, high acceleration and deceleration rolling linear guide development
Japan THK has developed SSR guide vice, it uses the following technology：
(1) The rolling body keeper is used in the guide vice, so that the rolling body is evenly arranged and smoothly circulating movement. This makes the SSR guide vice with low noise, maintenance-free, long life and other characteristics, and can carry out 300m/min ultra-high-speed linear motion. In addition, through a grease 2ml, running 2800km of no-load test.
(2) Self-lubricating maintenance-free device. In order to make rolling parts can work steadily for a long time and maintain its function, lubrication and maintenance-free requirements are very important, for this reason, Japan NSK developed rolling linear guide vice use of resin material containing lubricating oil “solid oil” of “KI series lubrication device “, the device in the seal contains a weight ratio of 70% of the lubricant, lubricant slowly overflow and maintain long-term lubrication capacity.
2. The development trend of the rolling linear guide of the roller type
Roller type rolling linear guide vice has a long life, high rigidity and low noise and other key features. It is divided into O type and X type two categories, X type for the German INA company to develop new products.
The development trend of the roller type rolling linear guide vice is mainly lubrication problem. Regular oiling is necessary, however, the device is complicated and high cost. For this reason, the Japanese Memuson company independently developed capillary tubular lubrication body installed in the slider body, can achieve 5 years or 20,000km of travel without maintenance. And Japan THK company developed QZ lubricator contains a fiber network and seals of the oil pool, also make the lubrication of the guide vice to achieve long-term maintenance-free technical requirements.
3. With magnetic grid measuring system of rolling linear guide vice
Schneeberger has developed a rolling linear guide named “monorail”, which combines the linear motion guidance function and the magnetic grid – digital display displacement detection function into one. The magnetized steel tape is attached to the side of the guideway, while the magnetic head that picks up the signal is fixed to the slider of the guideway and moves synchronously with it. The minimum resolution of the magnetic grid measuring system is 0.001, the accuracy is 0.005, and the maximum moving speed is 3m/min. The longest guideway can reach 3000mm, with a reference point every 50mm. “Monorail” rolling linear guide vice has the following characteristics:
（1）compact structure, easy to install, occupy little space;
（2）due to the measurement system installed in the guide body, significantly reduce the error, improve the accuracy of the length measurement;
（3）the magnetic grid sealed in the guide body, thus increasing the measurement system anti-interference ability.
4. Development of miniature guide sub
For medical, semiconductor manufacturing and metrology devices, THK developed guide widths of 1mm, 2mm, 4mm and other three models (length 100mm) standard products, with the following characteristics.
（1）Ultra-compact: LM guide sub-series in the smallest cross-sectional size, high reliability of ultra-compact products. It meets the requirements of light weight and space saving of equipment.
（2）Low rolling resistance.
（3）Ability to withstand loads in all directions.
（4）Excellent corrosion resistance: LM guide and ball are made of martensitic stainless steel, with excellent corrosion resistance, most suitable for use in medical equipment and clean rooms.
Post time: Dec-30-2022
