CN216066009U

CN216066009U - Handheld laser welding gun with coaxial wire feeding in light

Info

Publication number: CN216066009U
Application number: CN202122673145.6U
Authority: CN
Inventors: 廖建平
Original assignee: Taiyi Laser Technology Co ltd
Current assignee: Taiyi Laser Technology Co ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-03-18
Anticipated expiration: 2031-11-03

Abstract

The utility model discloses a hand-held laser welding gun capable of coaxially feeding wires in light, which comprises a laser collimation unit, a light splitting unit, a wire feeding unit and a laser focusing unit, wherein a wire feeding guide pipe penetrates through central shafts of a main reflector and a focusing mirror and is positioned in the center of three split beams, and the three focused beams are converged at the top of a wire material after being focused by the focusing mirror.

Description

Handheld laser welding gun with coaxial wire feeding in light

Technical Field

The utility model belongs to the field of laser welding, and particularly relates to a handheld laser welding gun with an optical inner coaxial wire feeding function.

Background

Most of the laser filler wire welding widely used in industry at present adopts a paraxial wire feeding mode, however, due to the limitation of the wire feeding direction, the welding seam track of the laser filler wire welding is limited to some simple shapes, such as a straight line and the like. Besides, the technological process of the paraxial wire feeding laser welding is very complex, and is influenced by the wire feeding angle, the gap of the optical wire and the wire feeding position besides the common laser power, welding speed and wire feeding speed, so that the technological stability of the paraxial wire feeding laser welding is poor, and the processing efficiency is low.

In order to solve the above problems of paraxial wire feed laser welding, patent document 1 (publication No. CN110614449A) discloses an optical mechanism for coaxial wire feed based on multi-beam splitting ellipsoidal mirror light and a working method thereof, which adopts the multi-beam splitting ellipsoidal mirror to split and focus a scattered laser beam into a plurality of beams, and then converges the beams to one point through a plane mirror, although the structure is very simple, the processing difficulty of the multi-beam splitting ellipsoidal mirror is very large, and it is difficult to ensure that the energy of each split beam is the same; in addition, the wire feeding structure adopted by the patent has a bending transition section, so that the wire can be bent before being fed to a molten pool, and the coaxial wire feeding effect is difficult to ensure. The same patent document 2 (publication number: CN 111069770a) discloses an optical path splitting unit and its coaxial wire-feeding cladding head, the wire-feeding process still adopts bending transition, and the splitting process in the patent is very complicated. Patent document 3 (publication No. CN105499793A) discloses an optical path splitting unit of a coaxial wire-feeding cladding laser head, which uses two quarter lenses to split a light beam into four parallel beams, however, the structure of the quarter lenses used in the patent is complicated and the processing difficulty is very large, and it is also difficult to ensure the splitting effect of the front and rear quarter lenses.

Therefore, aiming at the problems, the handheld light inner coaxial wire feeding laser welding gun is provided, the triangular pyramid plane beam splitting reflector and the prism plane reflector are adopted to equally split the collimated laser beam into three parallel light beams, the wire feeding unit is integrated on the welding gun, and the coaxial effect of the wire and the light beams is ensured. The device simple structure can accomplish the handheld laser of complicated orbit and fill the silk welding.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides a handheld laser welding gun with an optical inner coaxial wire feeding function, which adopts the following technical scheme:

a hand-held type optical coaxial wire feeding laser welding gun comprises a laser output head, a laser collimation unit, a prism plane reflector, a triangular pyramid plane beam splitter reflector, a start button, a welding gun handle, a beam splitter cavity, a collimated round light beam, a collimated lens, a wire feeding nozzle, a shielding gas nozzle, a focused light beam, a shielding gas interface, a laser focusing unit, a focusing lens, a light beam transmission cavity, a split light beam, a main reflector, a wire feeding unit, a wire feeding guide wheel, a wire material and a wire feeding guide pipe;

the prism plane reflector, the triangular pyramid plane beam splitting reflector and the beam splitting mirror cavity jointly form a beam splitting unit of the handheld laser welding gun;

the number of the prism plane reflectors is three, and the reflecting surfaces of the prism plane reflectors form an angle of 45 degrees with the horizontal plane;

the triangular pyramid plane beam splitting reflector is provided with three reflecting planes, and each reflecting plane and the horizontal plane form an angle of 45 degrees;

the three prism plane reflectors are uniformly arranged in the directions of the three reflecting surfaces of the triangular pyramid plane beam splitting reflector, and the reflecting surface of each prism plane reflector is parallel to the reflecting surface of the opposite triangular pyramid plane beam splitting reflector.

Preferably, the cross section of the collimated round light beam is circular, the collimated round light beam is split by the triangular pyramid plane beam splitting reflector and reflected by the prism plane beam splitting reflector to be converted into three parallel sub-beams, and the cross section of the sub-beams is in a sector shape with a central angle of 120 degrees.

Preferably, the wire feed conduit passes through a central axis of the primary mirror and the focusing mirror, and the wire feed conduit is parallel to the sub-beam reflected by the primary mirror.

Preferably, the wire feeding unit is installed on the handheld laser welding gun, the wire feeding nozzle is installed at the front end of the wire feeding guide pipe, and the wire is straightened by four wire feeding guide wheels of the wire feeding unit, then is fed into the wire feeding guide pipe and finally is fed out from the wire feeding nozzle.

Preferably, the three parallel sub-beams are reflected by the main reflecting mirror and then emitted to the focusing mirror, and are focused to form three focused beams, and the focal points of the three focused beams are converged at the top point of the wire.

Preferably, the shielding gas interface is connected with shielding gas in the welding process, and the shielding gas nozzle and the wire feeding nozzle are coaxially arranged, so that the design of coaxial light emitting, wire discharging and gas outlet of the handheld laser welding gun is realized together.

Preferably, the start button is located on the welding gun handle, which controls both the laser output and the wire feed unit to feed wire.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model has simple structure, completely depends on the reflection principle of the plane reflector, equally divides the light beam into three beams, has high light splitting efficiency and almost has no energy loss of laser;

2. the wire feeding unit is integrated on the welding gun, so that the feeding efficiency of the wire is ensured, and meanwhile, the wire is directly fed into a molten pool after being straightened by the wire feeding guide wheel, so that the coaxial wire feeding effect is ensured, and the stability of the coaxial wire feeding laser welding is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a cross-sectional view of a hand-held optical inner coaxial wire feed laser welding gun of the present invention;

FIG. 2 is an overall block diagram of the hand-held optical coaxial wire feed laser welding gun of the present invention;

FIG. 3 is a schematic diagram of splitting the optical path of the light splitting unit according to the present invention;

fig. 4 is a structural view of a triangular pyramid plane beam splitter of the present invention.

The laser welding device comprises a 1-laser output head, a 2-laser collimation unit, a 3-prism plane reflector, a 4-triangular pyramid plane beam splitter reflector, a 5-start button, a 6-welding gun handle, a 7-beam splitter cavity, an 8-collimation round beam, a 9-collimation lens, a 10-wire feeding nozzle, an 11-shielding gas nozzle, a 12-focusing beam, a 13-shielding gas interface, a 14-laser focusing unit, a 15-focusing lens, a 16-beam transmission cavity, a 17-splitting beam, an 18-main reflector, a 19-wire feeding unit, a 20-wire feeding guide wheel, a 21-wire and a 22-wire feeding guide pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-3, the present invention provides a handheld light internal coaxial wire feeding laser welding gun, which includes a laser output head 1, a laser collimating unit 2, a prismatic plane reflecting mirror 3, a triangular pyramid plane beam splitting reflecting mirror 4, a start button 5, a welding gun handle 6, a beam splitting mirror cavity 7, a collimated circular light beam 8, a collimated lens 9, a wire feeding nozzle 10, a shielding gas nozzle 11, a focused light beam 12, a shielding gas interface 13, a laser focusing unit 14, a focusing mirror 15, a light beam transmission cavity 16, a split light beam 17, a main reflecting mirror 18, a wire feeding unit 19, a wire feeding guide wheel 20, a wire 21, and a wire feeding guide pipe 22, wherein the prismatic plane reflecting mirror 3, the triangular pyramid plane beam splitting reflecting mirror 4, and the beam splitting mirror cavity 7 jointly constitute a beam splitting unit of the handheld laser welding gun; the prism plane reflecting mirrors 3 are three in number, and the reflecting surfaces of the prism plane reflecting mirrors form an angle of 45 degrees with the horizontal plane; the triangular pyramid plane beam splitting reflector 4 has three reflecting planes, and each reflecting plane and the horizontal plane form an angle of 45 degrees; the three prismatic plane reflectors 3 are uniformly arranged in the directions of the three reflection surfaces of the triangular pyramid plane partial reflector 4, and the reflection surface of each prismatic plane reflector 3 is parallel to the reflection surface of the opposite triangular pyramid plane partial reflector 4.

As shown in fig. 3, laser is emitted from the laser output head 1, and is changed into a collimated circular beam 8 after passing through a collimating lens 9, wherein the cross section of the collimated circular beam 8 is circular, the collimated circular beam 8 is split into three sub-beams 17 through a triangular pyramid plane light splitting reflector 4, wherein the cross section of the sub-beam 17 is a sector with a central angle of 120 °, and the three sub-beams 17 are parallel to each other after being reflected by a prism plane reflector 3; in order to insert the wire into the center of the three parallel sub-beams 17, the sub-beams 17 are reflected again by the main mirror 18, wherein the main mirror 18 and the focusing mirror 15 are provided with a small hole at the center for penetrating the wire feeding guide tube 22, after being reflected by the main mirror 18, the three parallel sub-beams 17 are parallel to the wire feeding guide tube 22, and the wire feeding guide tube 22 is located at the center of the three parallel sub-beams 17.

In order to ensure that the wire is not bent, the wire feeding unit 19 is mounted on the welding gun, and the wire is straightened by four wire feeding guide wheels 20, then directly fed into a wire feeding guide pipe 22 and then enters a molten pool through a wire feeding nozzle 10; the three sub-beams 17 are converged at the top of the wire material after passing through the focusing lens 15.

In the welding process, the shielding gas interface 13 is connected with the shielding gas in the welding process, and the shielding gas nozzle 11 and the wire feeding nozzle 10 are coaxially arranged, so that coaxial light emitting, wire discharging and gas discharging of the handheld laser welding gun are realized together; the start button 5 is located on the welding gun handle 6, which simultaneously controls the laser output and wire feed unit 19 to feed wire.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the utility model, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A hand-held type optical inner coaxial wire feeding laser welding gun is characterized by comprising a laser output head (1), a laser collimation unit (2), a prism plane reflector (3), a triangular pyramid plane beam splitter reflector (4), a start button (5), a welding gun handle (6), a beam splitter cavity (7), a collimation round light beam (8), a collimation lens (9), a wire feeding nozzle (10), a shielding gas nozzle (11), a focusing light beam (12), a shielding gas interface (13), a laser focusing unit (14), a focusing mirror (15), a light beam transmission cavity (16), a beam splitter (17), a main reflector (18), a wire feeding unit (19), a wire feeding guide wheel (20), wires (21) and a wire feeding guide pipe (22);

the prism plane reflector (3), the triangular pyramid plane beam splitting reflector (4) and the beam splitting mirror cavity (7) jointly form a beam splitting unit of the handheld optical inner coaxial wire feeding laser welding gun;

the number of the prism plane reflectors (3) is three, and the reflecting surfaces of the prism plane reflectors form an angle of 45 degrees with the horizontal plane;

the triangular pyramid plane beam splitting reflector (4) has three reflecting planes, and each reflecting plane and the horizontal plane form an angle of 45 degrees;

the three prism plane reflectors (3) are uniformly arranged in the directions of the three reflecting surfaces of the triangular pyramid plane beam splitting reflector (4), and the reflecting surface of each prism plane reflector (3) is parallel to the reflecting surface of the opposite triangular pyramid plane beam splitting reflector (4).

2. The hand-held light internal coaxial wire feed laser welding gun according to claim 1, characterized in that the cross section of the collimated circular beam (8) is circular, and the collimated circular beam is split by a triangular pyramid plane beam splitter (4) and reflected by a prism plane beam splitter (3) to be converted into three parallel sub beams (17), and the cross section of the sub beam (17) is a sector with a central angle of 120 degrees.

3. A hand-held endo-optical coaxial wire feed laser welding gun according to claim 1, characterised in that the wire feed conduit (22) passes through the central axes of the primary mirror (18) and the focussing mirror (15), and that the wire feed conduit (22) is parallel to the sub-beam (17) reflected by the primary mirror (18).

4. A hand-held optical coaxial wire feed laser welding gun according to any one of claims 1-3, characterized in that the wire feed unit (19) is mounted on the hand-held optical coaxial wire feed laser welding gun, the wire feed nozzle (10) is mounted in front of the wire feed conduit (22), and the wire (21) is straightened by four wire feed rollers (20) of the wire feed unit (19) and fed into the wire feed conduit (22) and finally out of the wire feed nozzle (10).

5. A hand-held coaxial wire feed laser welding gun as claimed in any one of claims 1-2, wherein said three parallel sub-beams (17) are reflected by the primary mirror (18) and directed to the focusing mirror (15) where they are focused into three focused beams (12), and the focal points of the three focused beams (12) converge at the filament apex.

6. The laser welding gun with the coaxial wire feeding in the light is characterized in that the shielding gas interface (13) is connected with shielding gas in a welding process, and the shielding gas nozzle (11) and the wire feeding nozzle (10) are coaxially arranged, so that the design of coaxial light emitting, wire discharging and gas discharging of the laser welding gun with the coaxial wire feeding in the light is realized.

7. The laser welding gun with internal light coaxial wire feeding as claimed in claim 1, wherein the start button (5) is located on the welding gun handle (6) and controls the laser output and the wire feeding unit (19) to feed wire simultaneously.