High-speed direct-driven machine tool fourth shaft

Abstract

The invention relates to a high-speed direct-driven machine tool fourth shaft. The high-speed direct-driven machine tool fourth shaft is characterized by comprising a machine body, a back air flotation plate, a front air flotation plate, a rotating disc, an encoder, an intake joint and a guide hole, wherein a motor stator, a motor rotor, a bearing base, a bearing mounted on the bearing base and a rotating shaft are mounted in the machine body in sequence from outside to inside; the rotating shaft is mounted in the bearing; the motor rotor is connected with the rotating shaft; the back air flotation plate is mounted on the bearing base; the front air flotation plate is mounted on the back air flotation plate; the front air flotation plate and the back air flotation plate are respectively not contacted with the disc surface of the rotating shaft; a radial gap is formed between the front air flotation plate and the rotating shaft; the rotating disc is mounted on the rotating shaft through a screw; the encoder is mounted in the machine body; gaps formed by the front air flotation plate and the back air flotation plate with the rotating shaft are communicated to the intake joint through intake holes; and the guide hole is formed in the bearing base, and is communicated with the intake holes. The high-speed direct-driven machine tool fourth shaft solves the waterproof difficulty of high-speed rotation to cutting liquid, can reduce the power loss, and improves the machining efficiency.

Description

technical field [0001] The invention belongs to the field of the fourth axis for machining of numerical control machine tools, in particular to a fourth axis of a high-speed direct drive machine tool. Background technique [0002] Generally, when the workpiece is not positioned in space, it has six degrees of freedom, X\Y\Z three linear displacement degrees of freedom and the corresponding A\B\C three rotational displacement degrees of freedom. The six degrees of freedom usually use the X\Y\Z of the Cartesian coordinate system to express the three linear axes, and use the corresponding A\B\C to express the three rotary axes. For example, when designing a multi-axis CNC machine tool, that is, a machining center, the number of axes needs to be set according to the planning of the machining object. The more common in the market is the three-axis CNC machining center, which has three linear displacement axes of X\Y\Z. The so-called four-axis machining center generally adds a r...

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Problems solved by technology

Moreover, high-speed rotation also involves the problem of waterproof sealing

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