CN212270238U

CN212270238U - Laser cladding head based on double-vibrating-mirror system

Info

Publication number: CN212270238U
Application number: CN202022124656.8U
Authority: CN
Inventors: 王贤宝; 王明娣; 郭敏超; 倪玉吉; 张晓�
Original assignee: Suzhou University
Current assignee: Suzhou University
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-01-01
Anticipated expiration: 2030-09-24

Abstract

The utility model discloses a laser cladding head based on two mirror systems that shake, including a light guide cylinder, set up the end of cladding at a light guide cylinder distal end, cladding has the laser on the end and throws the passageway, and along the projection direction of laser beam in this laser projection passageway from the back set gradually first mirror, the second that shakes, focusing mirror and protective glass, wherein, first the rotation center line that shakes with the rotation center line mutually perpendicular of mirror is shaken to the second, just first the rotation center line that shakes with the projection direction mutually perpendicular of laser beam in the light guide cylinder. The first vibrating mirror and the second vibrating mirror are driven to scan in the x-axis direction and the y-axis direction respectively to form rectangular light spots, the light spots are under the action of the focusing mirror, light beams irradiated to the surface of a material are more uniform, and meanwhile, the laser cladding efficiency is greatly improved. The laser cladding head has the advantages that the number of lenses in the laser cladding head is small, the structure is simple, each lens can be well protected in the machining process, and the service life is long.

Description

Laser cladding head based on double-vibrating-mirror system

Technical Field

The utility model relates to a laser cladding field especially relates to a laser cladding head based on two mirror systems that vibrate.

Background

Laser cladding is a method of adding a cladding material to the surface of a base material and fusing the cladding material with a thin layer on the surface of the base material by using a laser beam having a high energy density, thereby forming a filler cladding layer on the surface of the base layer. As a new surface modification technology, laser cladding has many advantages such as compact structure, good bonding between a coating and a substrate, and many suitable cladding materials, and thus has a wide application in recent years, for example, in surface repair processing of the peripheral wall of an inner hole in equipment.

The existing laser cladding optical head has two main aspects on the principle of laser beam processing: 1. the laser is changed into rectangular light spots through the action of lenses such as a collimating lens, a focusing lens, an integrating mirror and the like, the mode for optimizing the quality of the light spots is simple in structure, but the lenses are easily damaged due to the problem of working environment; 2. through the mode of coaxial powder feeding in the light, blow off the powder from the powder feeding passageway on the direct action facula, powder transport and cladding go on in step, and this kind of mode can improve cladding layer quality, improves the powder utilization ratio, but its structure is complicated, and optical head equipment cost is big.

Disclosure of Invention

The utility model aims at providing a laser cladding head based on two galvanometer systems to overcome one or more defects of prior art laser cladding head.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a laser cladding head based on two mirror systems that shake, the laser cladding head is in including a light pipe, setting the cladding end of light pipe distal end, and set up cladding end just has the powder feeding nozzle who send the powder passageway, it throws the passageway to melt the laser that has on the end, first mirror, the second that shakes, focusing mirror and protective glass have set gradually forward from the back along the projection direction of laser beam in the laser projection passageway, it is used for the drive to melt to be equipped with on the end first motor that shakes the mirror is rotatory, is used for the drive the second motor that the mirror is rotatory is shaken to the second, wherein, the rotation center line that first shakes with the rotation center line mutually perpendicular of second mirror that shakes, just the rotation center line that first shakes with the projection direction mutually perpendicular of laser beam in the light pipe.

Preferably, the laser projection channel has a first channel and a second channel which are communicated with each other, the extending direction of the first channel is perpendicular to the extending direction of the second channel, and the second galvanometer is arranged at the joint of the first channel and the second channel.

Furthermore, the extending direction of the first channel, the extending direction of the second channel and the projecting direction of the laser beam in the light guide cylinder are mutually vertical.

Further, the cladding end is arranged at the far end of the light guide cylinder and positioned on one side of the light guide cylinder.

Further, the first motor is installed at the top of the cladding end head, and the second motor is installed on one side of the cladding end head.

Furthermore, the second motor and the light guide cylinder are positioned on the same side of the cladding end.

Preferably, the outlet of the powder feeding channel is positioned in front of the protective glasses.

Preferably, the cladding end head is further provided with a cooling channel, and the cooling channel is annularly arranged on the cladding end head.

Further, the cooling channel is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively arranged on different sides of the cladding end head, and the water outlet is higher than the water inlet.

Preferably, the laser cladding head further comprises a collimating lens arranged at the near end of the light guide cylinder and a connector connected with the laser.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model discloses a laser cladding head based on two mirror systems that shake, wherein shake the mirror through setting up first mirror and the second that shakes respectively in two mutually perpendicular's directions for first mirror and the second that shakes scans respectively in x axle and y axle direction and forms the rectangle facula, and this facula makes the light beam that shines the material surface more even through the effect of focusing mirror, has very big improvement on laser cladding efficiency simultaneously. The laser cladding head has the advantages that the number of lenses in the laser cladding head is small, the structure is simple, each lens can be well protected in the machining process, and the service life is long.

Drawings

Fig. 1 is a schematic view of the overall structure of the laser cladding head of the present invention;

FIG. 2 is a schematic sectional view of the laser cladding head of the present invention;

fig. 3 is a front view of the laser cladding head of the present invention;

FIG. 4 is a longitudinal sectional view of the laser cladding head of FIG. 3;

fig. 5 is a schematic diagram of an optical path transmission route in a laser projection channel in the laser cladding head of the present invention;

wherein: 1. a light guide tube; 2. cladding the end; 21. a water inlet; 22. a water outlet; 3. a first galvanometer; 4. a second galvanometer; 5. a first motor; 6. a second motor; 7. a focusing mirror; 70. a focusing lens base; 8. protective glasses; 80. A protective lens base; 9. a powder feeding nozzle; 91. a powder feeding port.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 5, a laser cladding head based on a double-vibrating mirror system includes a light guide tube 1, a cladding end 2 disposed at a distal end of the light guide tube 1, a collimating mirror (not shown in the figure) disposed inside a proximal end of the light guide tube 1, a connector 10 for connecting a laser, and a powder feeding nozzle 9 disposed at a distal end of the cladding end 2 and having a powder feeding channel, wherein a laser beam emitted by the laser is collimated by the collimating mirror and then projected forward along the light guide tube 1 to the cladding end 2.

The cladding end 2 is provided with a laser projection channel, a first vibrating mirror 3, a second vibrating mirror 4, a focusing mirror 7 and a protective mirror 8 are sequentially arranged in the laser projection channel from back to front along the projection direction of laser beams, a first motor 5 for driving the first vibrating mirror 3 to rotate and a second motor 6 for driving the second vibrating mirror 3 to rotate are arranged on the cladding end 2, wherein the rotating central line of the first vibrating mirror 3 is perpendicular to the rotating central line of the second vibrating mirror 4, and the rotating central line of the first vibrating mirror 3 is perpendicular to the projection direction of the laser beams in the self-guide cylinder 1.

Specifically, the laser projection channel in the cladding end head 2 is provided with a first channel and a second channel which are communicated with each other, the extending direction of the first channel is perpendicular to the extending direction of the second channel, and the second galvanometer 4 is arranged at the position where the first channel is connected with the second channel. Here, the extending direction of the first channel, the extending direction of the second channel, and the projecting direction of the laser beam in the light guide cylinder 1 are perpendicular to each other. The laser beam is projected to the first channel from the light guide cylinder 1 and then projected to the first vibrating mirror 3, passes through the first vibrating mirror 3 and then is projected to the second vibrating mirror 3 along the first channel, then passes through the second vibrating mirror 4 and then is projected to the second channel, and then sequentially passes through the focusing mirror 7 and the protective mirror 8 and is projected to the surface to be processed.

In this embodiment, the second galvanometer 4 is arranged in the x direction, the first galvanometer 3 is arranged in the y direction, and the first galvanometer 3 and the second galvanometer 4 respectively scan in the x axis direction and the y axis direction to finally form a rectangular light spot, and the light spot is more uniform through the action of the focusing mirror 7 to irradiate light beams on the surface of the material. Compared with a round spot, the rectangular spot has a spot variation range of 20-40mm, so that the laser cladding efficiency is greatly improved.

In this embodiment, referring to fig. 1 to 4, the cladding tip 2 is disposed at the distal end of the light guide tube 1 and located at one side of the light guide tube 1, the first motor 5 is installed at the top of the cladding tip 2, and the second motor 6 is installed at one side of the cladding tip 2 and located at the same side of the cladding tip 2 as the light guide tube 1.

In the cladding end head 2, a focusing lens 7 is sequentially arranged on the cladding end head 2 through a focusing lens seat 70 and a protective lens 8 through a protective lens seat 80, a powder feeding nozzle 9 is arranged at the tail end of the cladding end head 2, a powder feeding port 91 communicated with a powder feeding channel is arranged on the powder feeding nozzle, and an outlet of the powder feeding channel is positioned in front of the protective lens 8, so that the powder is prevented from entering the cladding end head 2 to cause the damage of the focusing lens 7 and a vibrating lens. The powder feeding nozzle 9 is additionally provided with a protective gas channel, so that the splashed powder can be blown away by the introduced protective gas, and the effect of avoiding the protective glasses 8 is achieved. The powder feeding channel and the laser beam penetrating out of the cladding end head 2 are projected to the same position of the surface to be processed together, so that the powder can be timely clad on the surface to be processed when reaching the surface to be processed.

Referring to fig. 1, a cooling channel (not shown in the figure) is further formed on the cladding tip 2, the cooling channel is annularly arranged on the cladding tip 2, the cooling channel is provided with a water inlet 21 and a water outlet 22, the water inlet 21 and the water outlet 22 are respectively arranged on different sides of the cladding tip 2, the water inlet 21 and the water outlet 22 are located at different positions in the height extending direction of the cladding tip 2, and the water outlet 22 is specifically higher than the water inlet 21. Therefore, the cooling function can be performed on the parts with larger heat productivity in the laser cladding head, such as the peripheries of the first motor 5 and the second motor 6, and the peripheries of the focusing mirror 7 and the protective mirror 8, and damage to each lens and the motor caused by temperature is avoided.

To sum up, the utility model discloses a laser cladding head based on two mirror systems that shake wherein shakes mirror 4 through setting up first mirror 3 and the second that shakes respectively in two mutually perpendicular's direction for first mirror 3 that shakes and second shake mirror 4 and scan respectively in x axle and y axle direction and form the rectangle facula, and this facula makes the light beam that shines the material surface more even through focusing mirror 7's effect, has very big improvement on laser cladding efficiency simultaneously. The laser cladding head has the advantages that the number of lenses in the laser cladding head is small, the structure is simple, each lens can be well protected in the machining process, and the service life is long.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a laser cladding head based on two mirror systems that shake which characterized in that: the laser cladding head includes a light guide cylinder, sets up the cladding end of light guide cylinder distal end, and set up cladding end and have the powder feeding nozzle who send the powder passageway, it throws the passageway to have laser on the end to clad, along the projection direction of laser beam in the laser throws the passageway and has set gradually first mirror, second mirror, focusing mirror and protective glass of shaking from the back forward, it is used for the drive to clad to be equipped with on the end first motor that shakes the mirror rotation, be used for the drive the second motor that the mirror is rotatory is shaken to the second, wherein, the rotation center line of first mirror that shakes with the rotation center line mutually perpendicular of second mirror that shakes, just the rotation center line of first mirror that shakes with the projection direction mutually perpendicular of laser beam in the light guide cylinder.

2. The laser cladding head based on the dual-galvanometer system of claim 1, characterized in that: the laser projection channel is provided with a first channel and a second channel which are communicated with each other, the extending direction of the first channel is perpendicular to the extending direction of the second channel, and the second galvanometer is arranged at the joint of the first channel and the second channel.

3. The dual-mirror system based laser cladding head of claim 2, wherein: the extending direction of the first channel, the extending direction of the second channel and the projecting direction of the laser beams in the light guide cylinder are mutually vertical.

4. The dual-mirror system based laser cladding head of claim 2, wherein: the cladding end is arranged at the far end of the light guide cylinder and positioned on one side of the light guide cylinder.

5. The dual-mirror system based laser cladding head of claim 2, wherein: the first motor is installed at the top of the cladding end head, and the second motor is installed on one side of the cladding end head.

6. The laser cladding head based on the dual-galvanometer system of claim 5, characterized in that: the second motor and the light guide cylinder are positioned on the same side of the cladding end.

7. The laser cladding head based on the dual-galvanometer system of claim 1, characterized in that: the outlet of the powder feeding channel is positioned in front of the protective glasses.

8. The laser cladding head based on the dual-galvanometer system of claim 1, characterized in that: the cladding end head is also provided with a cooling channel which is annularly arranged on the cladding end head.

9. The laser cladding head based on the dual-galvanometer system of claim 8, characterized in that: the cooling channel is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively arranged on different sides of the cladding end head, and the water outlet is higher than the water inlet.

10. The laser cladding head based on the dual-galvanometer system of claim 1, characterized in that: the laser cladding head further comprises a collimating lens arranged at the near end of the light guide cylinder and a connector connected with a laser.