Lubrication And Protection Of Guide Rails

1. Lubrication of rails

1) The role of guide rail lubricant

(1) Make the guide rail work as close to the liquid friction state as possible to reduce frictional resistance, reduce driving power and improve efficiency.

(2) Reduce guide rail wear and prevent guide rail corrosion. The flowing lubricating oil also acts as a flush.

(3) Avoid crawling at low speed and heavy load, and reduce vibration.

(4) Reduce frictional heat at high speed and reduce thermal deformation.

2) Selection of lubricating oil for machine tool guide rails

According to experience and data, the following factors are mainly considered when selecting lubricating oil for machine tool guide rails.

(1) It is used as both a hydraulic medium and a lubricating oil for the guide rail oil. According to the needs of different types of machine tool guide rails, the guide rail lubricating oil used as hydraulic medium at the same time can be selected, which not only meets the requirements of the guide rails, but also meets the requirements of the hydraulic system. For example, for a machine tool such as a coordinate boring machine, the viscosity of the guide rail oil (50°C) should be selected higher (40-90mm2/s), but like various types of grinding machines, the guide rail lubricating oil is often supplied by the hydraulic system, and the hydraulic system At this time, the viscosity (50°C) of the hydraulic lubricating oil of the guide rail should be selected to be lower (20-40mm2/s), that is, the viscosity required by the hydraulic system.

(2) Select viscosity according to sliding speed and average pressure.

(3) Choose according to the actual application of machine tool guide rail lubrication at home and abroad. When choosing to use the guide rail lubricant, you can also refer to the actual application examples of the existing machine tool guide rail lubrication at home and abroad.

The guide rails of CNC machine tools usually use centralized oil supply and automatic drip lubrication. Domestic lubrication equipment XHZ series thin oil centralized lubrication device. The device is composed of a quantitative lubrication pump, a precision oil filter for the same oil, a liquid level detector, a feed oil detector, a pressure relay, a progressive oil separator and an oil tank. Provide regular and quantitative oil supply to the guide rail surface.

Solid lubrication is to cover the friction surface of the guide rail with solid lubricant to form an adhesive solid lubricating film to reduce friction and wear. There are many types of solid lubricants, which can be divided into metals, metal compounds, inorganic substances and organic substances according to the basic raw materials. Add solid lubricant powder to lubricating grease to enhance or improve the bearing capacity, aging performance and high and low temperature performance of lubricating grease.