Guide rail lubrication terminal detection device and method

Abstract

The invention relates to a guide rail lubrication terminal detection device and detection method. An outlet of an oil supply pipe of the device is connected into an oil filling port of a lubricating oil way, the oil supply pipe is sequentially connected with a first one-way valve and a first on-off valve in series and connected with a pressure switch, an outlet of an air supply pipe of an air supply system is respectively connected with inlets of a first air way and a second air way, and the first air way is sequentially connected with a first throttle valve and a second one-way valve in series. A second throttle valve and an adjustable throttle valve are sequentially connected to the second air way in series, an air pressure differential sensor is arranged between the first air way and the second air way, and an outlet of the first air way is connected into an oil drainage port of a lubricating oil way. According to the method, the device is adopted for detection, and a detection result is obtained according to states of related elements. The detection device is compact in structure, convenient to use and capable of effectively achieving detection of oil ways or oil supply conditions of a high-precision numerical control cylindrical grinding machine rail lubrication terminal and other clearance type oil supply occasions.

Description

technical field [0001] The invention relates to a detection device and a detection method for a lubricating terminal of a guide rail, which is suitable for detecting the oil supply status of a lubricating terminal such as a high-precision numerically controlled cylindrical grinder with plastic-coated guide rails. Background technique [0002] Due to the high precision of the high-precision CNC cylindrical grinder, any vibration will affect its precision. Therefore, the guide rails mostly use sliding guide rails with soft PTFE belts on the surface of the steel substrate. In order to prevent wear and crawling of sliding friction, oil lubrication is required. Since the PTFE material itself has a certain lubricity, it requires a very small amount of lubricating oil, 2 or 3 drops per minute, to form an oil film on the surface of the guide rail. If the amount of oil is too large, the guide rail will float slightly, affecting the grinding Cutting accuracy. Since ordinary detection...

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Problems solved by technology

[0005] This kind of oil circuit is not closed (leakage) and the pressure is low, and the flow rate will fluctuate in the dynamic balance. If the conventional pressure gauge and flow meter detection method is used for detection, the following problems will exist: 1) When there is blockage or When damping, although the pressure of the oil injection port reaches the standard, there is no oil at the rear end of the guide rail. At this time, there will be a fault that the guide rail is partially oil-free but the pressure gauge does not alarm; 2) When the guide rail moves, it will drive the lubricating oil to flow faster (that is, scrape and dynamic pressure phenomenon), causing the oil pressure of the oil injection port behind the throttle on the oil supply side to drop. Conventional flowmeters (including diaphragm type, paddle type, thermistor type and Karman vortex type, etc.) have a limited range. Even if the minimum flow rate is 0.3L / min, it cannot meet the pressure of 0.06MPa and flow rate of 0.1 The detection requirements under L / min, and it is not suitable for detecting the working condition of the flow fluctuation when the guide rail moves

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