阅读说明：本技术 一种激光同轴熔丝加工头及激光汇聚点调节方法 (Laser coaxial fuse wire processing head and laser convergence point adjusting method ) 是由 王玉岱 刘琦 李怀学 单飞虎 胡全栋 于 2019-11-28 设计创作，主要内容包括：一种激光同轴熔丝加工头及激光汇聚点调节方法,包括分束主镜框和阵列设于分束主镜框周围的多个反射镜框,反射镜框通过多个调节螺栓连接在分束主镜框的入射通道和反射通道的交接处,分束主镜框与反射镜框的连接面上设有环形的凹槽,凹槽中设有弹性密封圈。本发明通过多个调节螺栓调节弹性密封圈的变形量及反射镜框中反光镜的偏转角度,来调节激光分束的偏转角度,以使各激光分束按照预设情况通过聚焦镜聚焦后在预设汇聚点处进行聚合,且调节方式操作方便快捷,既不会明显增大加工头的结构复杂度,也不会影响加工头的密封性和稳定性。此外,与磨修法相比,节省了反复修配的时间,且用于替换的配件也不必进行修配。(A laser coaxial fuse wire processing head and a laser convergence point adjusting method comprise a beam splitting main mirror frame and a plurality of reflection mirror frames arranged around the beam splitting main mirror frame in an array mode, wherein the reflection mirror frames are connected to the joint of an incident channel and a reflection channel of the beam splitting main mirror frame through a plurality of adjusting bolts, an annular groove is formed in the connecting surface of the beam splitting main mirror frame and the reflection mirror frames, and an elastic sealing ring is arranged in the groove. According to the invention, the deflection angle of the laser beam splitting is adjusted by adjusting the deformation of the elastic sealing ring and the deflection angle of the reflector in the reflector frame through the plurality of adjusting bolts, so that each laser beam splitting is focused by the focusing mirror according to a preset condition and then polymerized at a preset convergence point, and the adjusting mode is convenient and rapid to operate, so that the structural complexity of the machining head is not obviously increased, and the sealing property and the stability of the machining head are not influenced. In addition, compared with the grinding method, the time for repeated repair is saved, and the repair of the spare parts for replacement is not needed.)

1. A laser coaxial fuse wire processing head comprises a beam splitting main mirror frame and a plurality of reflection mirror frames arranged around the beam splitting main mirror frame in an array mode, wherein the reflection mirror frames are connected to the junction of an incident channel and a reflection channel of the beam splitting main mirror frame through a plurality of adjusting bolts;

and a locking element corresponding to the position of the adjusting bolt is arranged at the joint of the beam splitting main mirror frame and the reflection mirror frame, the locking element is used for fixing the position of the adjusting bolt, and the deflection angle of the laser beam splitting is adjusted by adjusting the deformation of the elastic sealing ring and the deflection angle of a reflecting mirror in the reflection mirror frame through a plurality of adjusting bolts, so that the laser beam splitting is focused through a focusing mirror according to a preset condition and then is polymerized at a preset convergence point.

2. The laser coaxial fuse processing head of claim 1, wherein each of the laser beam splits has a movable range of ± 30mm on a processing plane in which the predetermined convergence point is located.

3. The laser coaxial fuse processing head of claim 1, wherein the elastomeric seal ring has a hollow O-shaped cross-section and is made of a rubber material.

4. The laser coaxial fuse processing head as claimed in claim 1, wherein the elastic sealing ring has an outer diameter of 3 to 10mm and a wall thickness of 1 to 3 mm.

5. The laser coaxial fuse processing head of claim 3, wherein the resilient sealing ring has an outer diameter of 8mm and a wall thickness of 2.5 mm.

6. The laser coaxial fuse processing head of claim 1 wherein the sides of the mirror frame are provided with locking holes through which the locking elements pass to secure the adjustment bolts.

7. The laser coaxial fuse processing head of claim 1, wherein the end of the primary beam splitting mirror housing proximate the mirror housing is provided with a locking hole through which the locking element passes to secure the adjustment bolt.

8. The laser coaxial fuse processing head of claim 1, wherein the locking element is a jackscrew.

9. The laser coaxial fuse processing head of claim 1, wherein the number of said adjusting bolts is 3 or 4.

10. A laser convergence point adjustment method achieved by the laser coaxial fuse processing head of any one of claims 1 to 9, characterized by comprising the steps of:

the laser parallel light beams are split by a beam splitter in the beam splitting main mirror frame to form laser beam splitting;

the laser beam splitting is received and reflected by a reflector in a reflector frame and then focused by a focusing mirror;

the deflection angle of the laser beam splitting is adjusted by adjusting the deformation of the elastic sealing ring and the deflection angle of a reflector in a reflector frame through a plurality of adjusting bolts, so that the laser beam splitting is polymerized at a preset convergence point, and the laser beam splitting at the preset convergence point forms a focusing or defocusing state;

the position of the adjusting bolt is fixed by the locking element so that the deformation amount of the elastic sealing ring and the angle of the reflector in the reflector frame are kept unchanged.

Technical Field

The invention relates to the technical field of laser fuse wire additive processing, in particular to a laser coaxial fuse wire processing head and a laser convergence point adjusting method.

Background

The laser coaxial fuse forming technology is a laser additive manufacturing technology which takes laser as a heat source, takes synchronously fed wire materials as raw materials and keeps the wire materials and laser beams coaxial. One mainstream scheme is that a laser beam emitted from a laser is divided into 2-5 laser beam splits, each laser beam split is finally polymerized at a convergence point through reflection, focusing and the like, each laser beam split is circumferentially and symmetrically distributed, and a wire material is fed from the inside of the laser beam split and keeps a coaxial relation with the laser beam split, and is melted by high-energy laser at the light beam convergence point.

In practice, a laser coaxial fuse processing head is assembled from a plurality of functional units that perform complex optical transformations of beam splitting, reflection, focusing, etc., the laser beam being transformed from the original one optical axis to a plurality of optical axes in three-dimensional space. Because each functional unit has processing error, assembly error and the like, after light beams pass through the processing head, laser beam splitting with different optical axes in space cannot be polymerized at a theoretical convergence point according to a preset condition. The related functional units are generally abraded, but the method is time-consuming and labor-consuming, and the replaceability of accessories is poor.

Disclosure of Invention

The embodiment of the invention provides a laser coaxial fuse processing head and a laser convergence point adjusting method.

The invention provides a laser coaxial fuse wire processing head which comprises a beam splitting main mirror frame and a plurality of reflection mirror frames arranged around the beam splitting main mirror frame in an array mode, wherein the reflection mirror frames are connected to the joint of an incident channel and a reflection channel of the beam splitting main mirror frame through a plurality of adjusting bolts, an annular groove is formed in the connecting surface of the beam splitting main mirror frame and the reflection mirror frames, an elastic sealing ring is arranged in the groove, the outer edge of one side of the elastic sealing ring is in contact with the bottom of the groove, and the outer edge of the other side of the elastic sealing ring protrudes out of the top of the groove and is in contact with the reflection mirror frames;

and a locking element corresponding to the position of the adjusting bolt is arranged at the joint of the beam splitting main mirror frame and the reflection mirror frame, the locking element is used for fixing the position of the adjusting bolt, and the deflection angle of the laser beam splitting is adjusted by adjusting the deformation of the elastic sealing ring and the deflection angle of a reflecting mirror in the reflection mirror frame through a plurality of adjusting bolts, so that the laser beam splitting is focused through a focusing mirror according to a preset condition and then is polymerized at a preset convergence point.

Further, the movable range of each laser beam splitting on the processing plane where the preset convergence point is located is +/-30 mm.

Furthermore, the cross section of the elastic sealing ring is a hollow O-shaped cross section and is made of rubber materials.

Furthermore, the outer diameter of the elastic sealing ring is 3-10 mm, and the wall thickness is 1-3 mm.

Furthermore, the outer diameter of the elastic sealing ring is 8mm, and the wall thickness is 2.5 mm.

Furthermore, the side edge of the reflector frame is provided with a locking hole, and the locking element penetrates through the locking hole to fix the adjusting bolt.

Furthermore, the end part of the main beam splitting mirror frame, which is close to the reflector frame, is provided with a locking hole, and the locking element penetrates through the locking hole to fix the adjusting bolt.

Further, the locking element is a jackscrew.

Further, the number of the adjusting bolts is 3 or 4.

In a second aspect, the present invention provides a laser convergence point adjustment method implemented by the above laser coaxial fuse processing head, including the steps of:

the laser parallel light beams are split by a beam splitter in the beam splitting main mirror frame to form laser beam splitting;

the laser beam splitting is received and reflected by a reflector in a reflector frame and then focused by a focusing mirror;

the deflection angle of the laser beam splitting is adjusted by adjusting the deformation of the elastic sealing ring and the deflection angle of a reflector in a reflector frame through a plurality of adjusting bolts, so that the laser beam splitting is polymerized at a preset convergence point, and the laser beam splitting at the preset convergence point forms a focusing or defocusing state;

the position of the adjusting bolt is fixed by the locking element so that the deformation amount of the elastic sealing ring and the angle of the reflector in the reflector frame are kept unchanged.

In summary, the deflection angle of the laser beam splitting is adjusted by adjusting the deformation of the elastic sealing ring and the angle of the reflector in the reflector frame through the plurality of adjusting bolts, so that the laser beam splitting is focused through the focusing mirror according to a preset condition and then is polymerized at a preset convergence point, and the adjusting mode is convenient and quick to operate, the structural complexity of the machining head is not obviously increased, and the sealing performance and the stability of the machining head are not influenced. In addition, compared with the grinding method, the time for repeated repair is saved, and the repair of the spare parts for replacement is not needed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic illustration of laser focusing in a laser coaxial fuse processing head of the present invention.

Fig. 2 is an enlarged cross-sectional view taken at a in fig. 1.

In the figure:

1-laser parallel beam; 2-a beam splitter; 3-laser beam splitting; 4-a mirror; 5-a focusing mirror; 6-wire material; 7-presetting a convergent point; 8-splitting the main mirror frame; 9-reflector frame; 10-adjusting the bolt; 11-an elastic sealing ring; 12-locking element.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, alterations, and improvements in the parts, components, and connections without departing from the spirit of the invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 and 2, in a first aspect, the present invention provides a laser coaxial fuse processing head, including a beam splitting main mirror frame and 4 reflection mirror frames 9 arranged around the beam splitting main mirror frame 8 in an array, where the reflection mirror frames 9 are connected to a junction of an incident channel and a reflection channel of the beam splitting main mirror frame 8 through 4 adjusting bolts 10, a circular groove is provided on a connection surface of the beam splitting main mirror frame 8 and the reflection mirror frame 9, an elastic sealing ring 11 is provided in the groove, an outer edge of one side of the elastic sealing ring 11 contacts with a bottom of the groove, and an outer edge of the other side protrudes from a top of the groove and contacts with the reflection mirror frame 9, so as to achieve a sealing function.

It will be appreciated that in other embodiments, the reflector frame 9 may be provided in a plurality, and the specific number is set according to the number of the laser beam splitter 3.

In this embodiment, a locking element 12 corresponding to the position of the adjusting bolt is disposed at the joint of the beam splitting main lens frame 8 and the reflector lens frame 9, the locking element 12 is used for fixing the position of the adjusting bolt 10, and the deflection angle of the laser beam splitter 3 is adjusted by adjusting the deformation amount of the elastic sealing ring 11 and the deflection angle of the reflective mirror 4 in the reflector lens frame 9 through the plurality of adjusting bolts 10, so that each laser beam splitter 3 is focused by the focusing mirror 5 according to a preset condition and then is converged at the preset convergence point 7. At the same time, the wire 6 is fed from inside the laser beam splitter 3, in coaxial relation to the laser beam splitter 3, and is melted by the high energy laser at the predetermined convergence point 7.

It should be further understood that the movable range of the laser beam splitter 3 on the processing plane where the predetermined convergence point 7 is located is determined by the maximum deflectable angle of the reflector frame 9 and the transmission distance of the laser beam splitter 3, and in a preferred embodiment of the present invention, the movable range is ± 30mm, and the movable range is sufficient to adjust each laser beam splitter 3 to the position of the predetermined convergence point 7.

Referring to fig. 2, the cross section of the elastic sealing ring 11 is a hollow O-shaped section and is made of rubber material, so that the elastic sealing ring 11 has enough deformation to realize the deflection angle of the reflector frame 9.

In a preferred embodiment of the present invention, the elastic sealing ring 11 has an outer diameter of 3 to 10mm and a wall thickness of 1 to 3 mm.

Further, the outer diameter of the elastic sealing ring 11 is 8mm, and the wall thickness is 2.5 mm.

Referring to fig. 2, the side of the reflector frame 9 is provided with a locking hole, and the locking element 12 passes through the locking hole to fix the adjusting bolt 10.

In particular, in the present embodiment, the locking element 12 is a jackscrew, so as to adjust its position in the locking hole.

In another preferred embodiment of the present invention, the end of the beam splitting primary mirror frame 8 close to the mirror frame 9 is provided with a locking hole, and the locking element 12 passes through the locking hole to fix the adjusting bolt 10.

In this embodiment, the number of the adjusting bolts 10 is 4. It is understood that in other embodiments, the number of the adjusting bolts 10 may also be 3, or more, and the specific number may be set according to actual requirements.

In a second aspect, the present invention provides a laser convergence point adjustment method implemented by the above laser coaxial fuse processing head, including the following steps S110 to S140:

step S110, splitting the laser parallel beam 1 by a beam splitter 2 in a beam splitting main lens frame 8 to form a laser beam splitter 3;

step S120, the laser beam splitting 3 is received and reflected by a reflector 4 in a reflector frame 9, and then is focused through a focusing mirror 5;

step S130, adjusting the deflection angle of the laser beam splitter 3 by adjusting the deformation of the elastic sealing ring 11 and the deflection angle of the reflector 4 in the reflector frame 9 through a plurality of adjusting bolts 10, so that each laser beam splitter 3 is converged at a preset convergence point 7, and each laser beam splitter 3 forms a focusing or defocusing state at the preset convergence point 7; (ii) a

It should be noted that, in this step, the locking element 12 is first screwed out of the locking hole, that is, the locking element 12 is loosened, so as to facilitate the adjustment of the position of the adjusting bolt 10. Specifically, the pressing force of the adjusting bolts 10 is adjusted to adjust the deformation of the elastic sealing ring 11, so that the reflector frame 9 can make small-amplitude front-back left-right deflection relative to the beam splitting main frame 8, and the deflection of the reflector frame 9 can change the deflection angle of the laser beam splitter 3, so that the laser beam splitters 3 can be converged at the preset convergence point 7 by finely adjusting the pressing force of the four adjusting bolts 10.

In step S140, the position of the adjusting bolt 10 is fixed by the locking element 12 so that the amount of deformation of the elastic seal ring 11 and the angle of the mirror 4 in the mirror frame 9 are maintained. I.e. screwing the locking element 12 into the locking hole, thereby ensuring that the pressing force of the four adjusting bolts 10 remains constant.

In summary, the deflection angle of the laser beam splitter 3 is adjusted by adjusting the deformation of the elastic sealing ring 11 and the angle of the reflective mirror 4 in the reflective mirror frame 9 through the plurality of adjusting bolts 10, so that the laser beam splitter 3 is focused by the focusing mirror 5 according to a preset condition and then converged at the preset convergence point 7, and the adjustment mode is convenient and quick to operate, and the structural complexity of the machining head is not obviously increased, and the sealing performance and the stability of the machining head are not affected. In addition, compared with the grinding method, the time for repeated repair is saved, and the repair of the spare parts for replacement is not needed.

It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. For embodiments of the method, reference is made to the description of the apparatus embodiments in part. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.

The above description is only an example of the present application and is not limited to the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.