A high-power optical fiber cutting head with interchangeable focusing lenses with different focal lengths

Abstract

The invention discloses a high-power optical fiber cutting head with replaceable focus lenses with different focal distances. The high-power optical fiber cutting head comprises an optical fiber head and a cutting head body. A collimation assembly is arranged at the upper end of the cutting head body, a rapid locking positioning assembly fixing the optical fiber head is arranged on the collimation assembly, a long-focus focus lens base and a short-focus lens base which can be pushed in / drawn out relative to the cutting head body are arranged on the cutting head body, and are located on the long-focus focal point and the short-focus focal point correspondingly, a focus adjusting assembly is arranged at the lower end of the cutting head body, is connected with a composite cutting nozzle assembly at the bottom end of the cutting head body and can adjust the axial interval between the composite cutting nozzle assembly and the long-focus focus lens base or the short-focus lens base; during use, the axial interval between the composite cutting nozzle assembly and the long-focus focus lens base or the short-focus lens base with the matched focus lens is adjusted, and the emit laser of the optical fiber head is collimated by the collimation assembly and focused to the dotted light spot and is ejected from the composite cutting nozzle assembly.

Description

technical field [0001] The invention relates to the technical field of laser cutting, in particular to a high-power optical fiber cutting head capable of replacing focusing lenses with different focal lengths. Background technique [0002] In recent years, the domestic demand for laser cutting machine tools has increased rapidly. Fiber laser cutting machine tools have many advantages such as easy maintenance, low consumption cost, and excellent cutting section, so the growth in demand is particularly prominent. As an important component of the fiber laser cutting machine, the fiber laser cutting head directly affects the cutting quality of the fiber laser cutting machine. [0003] In the field of laser cutting, laser is used to cut the plate, and the thickness range of the cut plate is generally 0.1 mm to 30 mm. In actual cutting, when cutting medium and thin plates with a thickness of no more than 8mm, a short focal length focusing lens will be installed on the laser cutti...

AI Technical Summary

Problems solved by technology

However, the disadvantages of laser cutting machines in the prior art are that most of the existing cutting heads are only equipped with focusing lenses with one focal length, so that a laser cutting machine is only suitable for cutting plates with a certain thickness. The cutting of various types of plates often needs to cooperate with multiple laser cutting machines for production and processing, or be equipped with laser cutting heads of various specifications and focal lengths, and meet production needs by changing cutting heads of different specifications; The cutting machine will inevitably increase the production cost and equipment cost; at the same time, the laser cutting head and the focusing lens with different focal lengths are cumbersome to replace, and complex positioning verification is required after replacement, which wastes more manpower and material resources, reduces production efficiency, and processing Product consistency cannot be guaranteed

[0004] Therefore, the creators of this work designed a high-power optical fiber cutting head that can replace focusing lenses with different focal lengths based on the existing problem that focusing lenses with different focal lengths need to be used and the replacement of focusing lenses with long and short focal lengths is troublesome.

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