Large-stroke high-precision laser cutting machine based on permanent magnet linear motor servo system

Abstract

The invention discloses a large-stroke high-precision laser cutting machine based on a permanent magnet linear motor servo system. The laser cutting machine comprises a machine tool and a cylindricallinear motor arranged on the machine tool to drive the stroke, wherein the cylindrical linear motor comprises primary components; the primary components comprise a cylindrical primary iron core and motor windings; slots adapted to the motor windings are formed in the inner wall of the primary iron core; a radial main air duct is formed in the primary iron core; one end of the main air duct extendsto an end surface of the primary iron core to form an opening and the other end of the main air duct extends to the slot and is communicated with the slot; auxiliary air ducts communicated to one another are formed between the slots; and a fan is arranged at the opening of the main air duct. The air circulation effect is improved through the main air duct and the auxiliary air ducts, and thus theheat dissipation performance is improved and the permanent magnet linear motor and internal elements are protected. In addition, the weight of the cylindrical linear motor is reduced, the burden of the motor is alleviated and the motor performance is further improved.

Description

technical field [0001] The invention belongs to the technical field of laser cutting machines, in particular to a large-stroke high-precision laser cutting machine based on a permanent magnet linear motor servo system. Background technique [0002] In the field of CNC machine tool technology, fiber laser CNC cutting equipment is in the ascendant, but its core components depend on the servo system. Traditional servo systems include "rotary motor plus lead screw" and "rotary motor plus rack and pinion". The characteristic of this type of servo system is that the axial rotation of the motor is converted into linear motion, which relies on mechanical transmission. However, mechanical transmission has shortcomings such as large elastic deformation, slow response speed, and easy wear. The most important thing is that there is backlash. The processing conditions cannot be extended, resulting in the limitation of the stroke of fiber laser CNC cutting equipment. [0003] Linear mot...

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Problems solved by technology

[0004] Although the permanent magnet linear motor has many advantages, the permanent magnet linear motor uses high-frequency and high-voltage three-phase current to work, and the phenomenon of component heating is obvious. Long-term work will inevitably cause internal components to be damaged due to high temperature.

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