In terms of energy consumption, the linear motor is about twice as much as the “rotary servo motor + ball screw” when it provides the same torque. The stability of the control system is affected, and the impact on the surrounding area is relatively large. It is necessary to adopt the method of magnetic isolation and protection, and the influence of the strong magnetic field on the tumbling guide rail and the adsorption of iron filings and magnetic dust. Linear guide drive has unique advantages in the following CNC equipment: high speed, ultra-high speed, high acceleration, large output, many movements requiring positioning, and occasions where the speed and direction change frequently.
The promotion space of linear motors is relatively wide. In the future, the skills of linear motors will mature, and the output value will also increase. We need to consider from the perspective of energy saving, consumption reduction and green production. Linear guide rails sometimes touch water, such as lathes and machining centers, and water often splashes on the guide rails. If the water separation function of the guide rail oil is not good, it will be decomposed by water, and the oil will drop into the cutting fluid, which will cause damage to the cutting fluid. Pollution. Therefore, the water separation function of the guide rail is particularly important. In some precision machine tools, due to the convenience of use, the guide rail and the hydraulic system share the same oil, which usually requires a special hydraulic guide rail dual-use oil. Otherwise, only using hydraulic oil will cause the guide rail to wear or be washed away by water due to poor wear resistance.
Therefore, most of the smooth guide rails of imported machinery adopt the method of concentrated oil supply. The guide rail oil and extreme pressure grease are installed in a transparent container, and the machine will automatically supply it. No matter which oil is used, the lubricating grease used in the guide rail is lossy and cannot be recycled. Most of the linear guide rails are exposed and cannot be recovered for recycling. Fretting wear is the presence of some depressions in the channel, the distance of which is equal to the diameter of the steel ball. Oxidation is accelerated due to the extremely short stroke operation under the oil film and the turbulence. When using rails for short distances, use AFC grease, which creates a stronger oil film.
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