Bidirectional thrust vertical anti-leakage friction stir welding hydrostatic high-power electric spindle

Abstract

A bidirectional thrust vertical anti-leakage friction stir welding hydrostatic high-power electric spindle comprises a rotor shaft, wherein a rotor sleeve is fixedly mounted on a rotor part; an innerhole of the rotor sleeve is tapered and matched with the rotor shaft; the lower end of the rotor sleeve is fixed through a locking nut mounted on the rotor shaft; an upper bearing seat is arranged atthe upper part of a shell; a lower bearing seat is arranged at the lower end of the shell; the upper bearing seat and the lower bearing seat are used for radially supporting the upper and lower partsof the rotor shaft; axial thrust oil channels are arranged on the shell and communicate with four fans-shaped oil cavities II; the fan-shaped oil cavities II are arranged on the lower end surface of aflange arranged at the upper end of the shell; the axial thrust oil channels further communicate with four fan-shaped oil cavities I; the fan-shaped oil cavities I are arranged on the upper end surface of the upper bearing seat; and a shaft ring is arranged at the upper part of the rotor shaft as well as between the fan-shaped oil cavities I and the fan-shaped oil cavities II. A bidirectional thrust structure of the oil cavities is arranged on two sides of the shaft ring, the bidirectional stress of the spindle is great, and the pressed depth is great.

Description

technical field [0001] The invention belongs to the technical field of friction stir welding equipment, and relates to a bidirectional thrust vertical anti-leakage friction stir welding dynamic and static pressure high-power electric spindle. Background technique [0002] Friction stir welding is a new type of welding technology. As an advanced solid-state connection technology, it is widely used in the connection and manufacture of low melting point alloy components. As the most important functional component spindle in automatic welding equipment, belt drive and mechanical drive are often used in the past. Or some of the spindles driven by frequency converters use rolling bearings. The vibration of the spindle is large, the pressure of the pressed components is relatively small, and the rotating bearing is subjected to a large load, which causes the rotating shaft to deform and bend, which affects the temperature rise of the welding spindle, the bearing is damaged, and the ...

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Problems solved by technology

[0002] Friction stir welding is a new type of welding technology. As an advanced solid-state connection technology, it is widely used in the connection and manufacture of low melting point alloy components. As the most important functional component spindle in automatic welding equipment, belt drive and mechanical drive are often used in the past. Or some of the spindles driven by frequency converters use rolling bearings. The vibration of the spindle is large, the pressure of the pressed components is relatively small, and the rotating bearing is subjected to a large load, which causes the rotating shaft to deform and bend, which affects the temperature rise of the welding spindle, the bearing is damaged, and the precision of the spindle is reduced. The life of the main shaft is short and the reliability is not high. At the same time, since the friction stir welding is solid state welding, the main shaft needs a large power to drive the stirring needle to insert the welding member. At the same time, in the vertical friction stir welding process, the main shaft is used as the main Functional parts, due to the gravity of the main shaft and the stress state during work, the shaft shoulder of the main shaft and the end face of the dynamic and static pressure bearing are prone to friction, resulting in the failure of the main shaft and the shaft. Secondly, the leakage prevention problem caused by the hydraulic oil circulation of the vertical dynamic and static piezoelectric main shaft It is the main problem. Otherwise, the oil in the stator and rotor parts will cause the electric spindle to fail. This is also the difficulty in the design and processing of the dynamic and static pressure spindle. And the weight is large, which causes inconvenience in production and processing. After a fault occurs, the accuracy will be reduced after maintenance and disassembly, and it is difficult to restore

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