阅读说明：本技术 一种切割激光头的辅助气路装置 (Auxiliary gas circuit device of cutting laser head ) 是由 张忠磊 黄冬徽 李思佳 于 2020-07-06 设计创作，主要内容包括：本发明公开了一种切割激光头的辅助气路装置,包括保护镜连接座、气挡环、保护镜、喷嘴连接座、喷嘴、环形凹槽、气管通道、半圆孔和顶盖；本发明避免了切割气体单方向直接进入内部气流通道,气体通过气挡环后形成分布均匀的环形气流,湍流强度减少,气流稳定性提高,气缝中气体动量增大,有效去除残渣,从而提高了切割质量,同时经过气挡环后气流方向改变,对保护镜有一定吹扫作用,可以防止飞溅物黏附在保护镜上。(The invention discloses an auxiliary gas circuit device for a cutting laser head, which comprises a protective glass connecting seat, a gas baffle ring, a protective glass, a nozzle connecting seat, a nozzle, an annular groove, a gas pipe channel, a semicircular hole and a top cover, wherein the protective glass is arranged on the gas baffle ring; the invention avoids cutting gas from directly entering the internal airflow channel in a single direction, the gas forms uniformly distributed annular airflow after passing through the gas baffle ring, the turbulence intensity is reduced, the airflow stability is improved, the aerodynamic quantity in the gas gap is increased, and residues are effectively removed, thereby improving the cutting quality.)

1. The utility model provides an auxiliary gas circuit device of cutting laser head which characterized in that: comprises a protective glass connecting seat (1), an air baffle ring (2), a protective glass (3), a nozzle connecting seat (4), a nozzle (5), an annular groove (6), an air pipe channel (7), a semicircular hole (8) and a top cover (9);

the air baffle ring (2) is arranged on the protective mirror connecting seat (1);

a protective glass (3) is arranged on the top end of the air baffle ring (2), and a gap is formed between the air baffle ring (2) and the protective glass (3);

the top cover (9) is fixedly connected to the top end of the protective glass connecting seat (1);

the bottom end of the protective glass connecting seat (1) is fixedly connected with a nozzle connecting seat (4);

the bottom end of the nozzle connecting seat (4) is fixedly connected with a nozzle (5);

the right end of the protective glass connecting seat (1) is fixedly connected with an air pipe channel (7);

an annular groove (6) is formed in the outer surface of the air baffle ring (2), and the annular groove (6) is communicated with the air pipe channel (7);

a plurality of semicircular holes (8) are uniformly distributed on the periphery of the upper surface of the air baffle ring (2), and the semicircular holes (8) are communicated with the annular groove (6);

an air outlet gap is arranged between the semicircular hole (8) and the inner side of the protective glass connecting seat (1);

an air flow channel is arranged in the air baffle ring (2), and the air flow channel and the semicircular hole (8) in the air baffle ring (2) are communicated with an air outlet gap between the inner sides of the protective glass connecting seats (1).

2. The auxiliary gas path device for cutting laser head as claimed in claim 1, wherein: the inner wall of the air baffle ring (2) is in a taper shape.

3. The auxiliary gas path device for cutting laser head as claimed in claim 1, wherein: the number of the semicircular holes (8) is 20.

Technical Field

The invention relates to the technical field of laser cutting, in particular to an auxiliary gas circuit device for a cutting laser head.

Background

The laser cutting is to irradiate the workpiece with focused laser beam of high power density to melt or vaporize the irradiated material quickly, and then to blow high pressure gas through a nozzle coaxial with the laser beam to blow the melted or vaporized material away by the strong pressure of the gas to form a cutting seam.

The cutting gas path design will seriously affect the gas turbulence distribution, light path transmission and lens protection performance. When laser light propagates in turbulent flow, the fluctuation of gas refractive index caused by turbulent flow will cause the distortion of laser wave front, and destroy the coherence of laser light. The deterioration of laser coherence will seriously weaken the optical quality of laser, and cause the random drift of light, and the redistribution of laser energy on the beam cross section, including distortion, broadening, and fragmentation. In the laser thick plate processing, the processing quality of the workpiece is seriously influenced by the quality of the laser beam, and the quality of the beam which is not ideal causes the cutting opacity, the cutting efficiency low or the quality of the cutting section to be reduced.

Inside air current of traditional laser head directly enters into the inside air flue of laser head through the joint of ventilating, flows out from the nozzle again disorderly, and supplementary laser cuts. The air flow in the air blowing mode is vertically shot into an air passage in the laser head, the air flow is disordered in the internal transmission direction, the coherence of laser is damaged, meanwhile, the flow of auxiliary air flowing to a nozzle of the traditional laser head is weaker, the blowing effect on molten substances and the pushing back effect of splashes and dust entering from the nozzle are weakened, and the cutting effect of auxiliary laser is reduced.

Disclosure of Invention

The invention aims to solve the problems and provide an auxiliary gas path device of a cutting laser head, which provides a novel gas path design of the laser head, guides the direction of gas flow, improves the distribution of the gas flow, improves the stability of the gas flow, and improves the momentum of the gas entering a gas gap, thereby improving the cutting quality and preventing splashes from being adhered to a protective mirror.

In order to solve the above problems, the present invention provides a technical solution: an auxiliary gas circuit device for cutting a laser head comprises a protective mirror connecting seat, a gas baffle ring, a protective mirror, a nozzle connecting seat, a nozzle, an annular groove, a gas pipe channel, a semicircular hole and a top cover; the air baffle ring is arranged on the protective mirror connecting seat; a protective glass is arranged on the top end of the air baffle ring, and a gap is formed between the air baffle ring and the protective glass; the top cover is fixedly connected to the top end of the protective mirror connecting seat; the nozzle connecting seat is fixedly connected to the bottom end of the protective mirror connecting seat; the bottom end of the nozzle connecting seat is fixedly connected with a nozzle; the right end of the protective glass connecting seat is fixedly connected with an air pipe channel; an annular groove is formed in the outer surface of the air baffle ring and communicated with the air pipe channel; a plurality of semicircular holes which are uniformly distributed are formed in the periphery of the upper surface of the air baffle ring and communicated with the annular groove; an air outlet gap is arranged between the semicircular hole and the inner side of the protective mirror connecting seat; an air flow channel is arranged in the air baffle ring, and the air flow channel in the air baffle ring is communicated with an air outlet gap between the semicircular hole and the inner side of the protective glass connecting seat.

Preferably, the inner wall of the air baffle ring is tapered.

Preferably, the number of the semicircular holes is 20.

The invention has the beneficial effects that: the invention avoids cutting gas from directly entering the internal airflow channel in a single direction, the gas forms uniformly distributed annular airflow after passing through the gas baffle ring, the turbulence intensity is reduced, the airflow stability is improved, the aerodynamic quantity in the gas gap is increased, and residues are effectively removed, thereby improving the cutting quality.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic top view of the present invention.

1-protective glass connecting seat; 2-gas baffle ring; 3-protective glasses; 4-nozzle connecting base; 5-a nozzle; 6-an annular groove; 7-a tracheal passage; 8-semicircular holes; 9-top cover.

Detailed Description

As shown in fig. 1 and fig. 2, the following technical solutions are adopted in the present embodiment: an auxiliary gas circuit device for cutting a laser head comprises a protective mirror connecting seat 1, a gas baffle ring 2, a protective mirror 3, a nozzle connecting seat 4, a nozzle 5, an annular groove 6, a gas pipe channel 7, a semicircular hole 8 and a top cover 9; the air baffle ring 2 is arranged on the protective mirror connecting seat 1; the top end of the air baffle ring 2 is provided with a protective glass 3, and a gap is arranged between the air baffle ring 2 and the protective glass 3; the top cover 9 is fixedly connected to the top end of the protective glass connecting seat 1; the bottom end of the protective mirror connecting seat 1 is fixedly connected with a nozzle connecting seat 4; the bottom end of the nozzle connecting seat 4 is fixedly connected with a nozzle 5; the right end of the protective mirror connecting seat 1 is fixedly connected with an air pipe channel 7; an annular groove 6 is formed in the outer surface of the air baffle ring 2, and the annular groove 6 is communicated with an air pipe channel 7; a plurality of semicircular holes 8 which are uniformly distributed are formed in the periphery of the upper surface of the air baffle ring 2, and the semicircular holes 8 are communicated with the annular groove 6; an air outlet gap is arranged between the semicircular hole 8 and the inner side of the protective glass connecting seat 1; an air flow channel is arranged in the air baffle ring 2, and the air flow channel in the air baffle ring 2 is communicated with an air outlet gap between the semicircular hole 8 and the inner side of the protective glass connecting seat 1.

Wherein, the inner wall of the air baffle ring 2 is in a taper shape; the number of the semicircular holes 8 is 20.

The using state of the invention is as follows: cutting gas enters from the gas pipe channel 7 and then sequentially passes through the annular groove 6 on the gas baffle ring 2, the gas outlet gap between the semicircular hole 8 and the inner side of the protective glass connecting seat 1, so that annular upward uniform gas flow is formed, the upward gas flow is blocked by the protective glass 3, the direction is changed, and the gas flow is downwards ejected along the direction of the nozzle 5.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

The control mode of the invention is controlled by manually starting and closing the switch, the wiring diagram of the power element and the supply of the power source belong to the common knowledge in the field, and the invention is mainly used for protecting mechanical devices, so the control mode and the wiring arrangement are not explained in detail in the invention.