Large-size horizontal machining-center high-speed main-axle oil gas lubricating system

Abstract

The invention relates to an oil-gas lubrication system for a high speed main shaft in a large scale horizontal machining center. The oil-gas lubrication is adopted for the high speed main shaft with the diameter of large than 160 mm, and an external gas source and an external oil tank are arranged. The oil-gas lubrication system is characterized in that the system is composed of an oil-gas generating device and an oil-gas delivery mechanism, wherein, the lubrication circulation and the operation of an oil-filling pump are controlled through the program of an electric control unit inside the oil-gas generating device, the electric control unit is connected with the control system of a machining center through a connecting terminal, and the output of a control signal and the remote control of the oil-gas lubrication are realized; the gas source pipeline of the oil-gas generating device and the oil tank are respectively provided with an inductor and a pressure valve, and the pump is communicated with an oil-gas mixing and distribution unit inside the oil-gas generating device; a plurality of delivery pipelines of the oil-gas mixing and distribution unit are respectively connected with an oil-gas connector arranged at the bottom of a main shaft box, the oil-gas connector is communicated with an oil-gas channel on the bearing sleeve of the main shaft and the oil-gas channel on an annular outer sleeve gasket, and an oil-gas circulation delivery channel from entering the main shaft to being discharged out of the main shaft is formed. The friction coefficient between the inner / outer sleeve gasket and balls of the bearing system can be as low as 0.001 or even lower, simultaneously, the bearing of the main shaft is ensured to run in the required temperature range, the self control design can also ensure that once the running of the lubrication system is abnormal, the automatic shutdown of the machine tool can be implemented.

Description

technical field [0001] The invention relates to mechanical manufacturing equipment, namely an oil-air lubrication system for a high-speed spindle of a large horizontal machining center. technical background [0002] At present, the rated speed of the 110mm spindle in domestic horizontal machining centers is generally 2500r / min, and the rated speed of the 130mm spindle is generally 2000r / min. It is generally equipped with small and medium-sized horizontal machining centers. The rated speed of the 160mm spindle is generally 1500r / min, which is used for large Horizontal machining center. In China, small and medium-sized horizontal machining centers have achieved high-speed cutting for many years, but it is still relatively rare for large-scale and large-spindle horizontal machining centers to achieve high-speed cutting in China. The main reason is that in order to realize the high-speed rotation of the large-diameter spindle, it is necessary to overcome the bottlenecks in the ...

AI Technical Summary

Problems solved by technology

At present, there is no domestic manufacturer producing such a large-scale horizontal machining center with a spindle diameter above 160mm and high speed. Users can only import from abroad, and the price is very expensive.

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