Lubrication terminal detection device and detection method of guide rail

Abstract

The invention relates to a detection device and a detection method for a lubricating terminal of a guide rail. The outlet of the oil supply pipe of the device is connected to the oil filling port of the lubricating oil circuit, and the oil supply pipe is sequentially connected with a first one-way valve and a first on-off valve and connected with a pressure switch. The outlets of the air supply pipe of the air supply system are respectively Connect the inlet of the first gas path and the second gas path, the first throttle valve and the second one-way valve are connected in series on the first gas path, and the second section is connected in series on the second gas path A flow valve and an adjustable flow valve, a differential pressure sensor is provided between the first air path and the second air path, and the outlet of the first air path is connected to the oil drain port of the lubricating oil path. The method adopts the above-mentioned device for detection, and obtains the detection result according to the state of the relevant components. The detection device of the present invention is compact in structure, easy to use, and can effectively realize the detection of the lubricating terminal of the track of a high-precision numerically controlled cylindrical grinder and the detection of the oil circuit or oil supply status of other intermittent 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, there will be the following problems: 1) When the oil circuit is blocked 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), resulting in a drop in the oil pressure at the oil injection port behind the throttle on the oil supply side. Although there is oil in the guide rail at this time, there will be a short-term alarm, and the failure of the pressure gauge to alarm; 3) Due to the current market Conventional flow meters (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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