CN216264029U

CN216264029U - Laser galvanometer focus positioning device

Info

Publication number: CN216264029U
Application number: CN202122168646.9U
Authority: CN
Inventors: 邱勇; 韩良煜
Original assignee: Suzhou Golden Orange Laser Technology Co ltd
Current assignee: Suzhou Golden Orange Laser Technology Co ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-04-12
Anticipated expiration: 2031-09-08

Abstract

The utility model provides a focal point positioning device of a laser galvanometer, which belongs to the technical field of laser galvanometer processing and comprises two laser tubes, wherein the light path of each laser tube is a cross line, the connecting line of the intersection point of the cross line and the emitting point of the cross line is parallel to the light path of a host laser, and the cross line is composed of two lines with different lengths. The utility model replaces the starting of a high-power host laser to position the focus, has simple operation, high focusing accuracy and low cost, does not need to have large electric power of the cross line, can avoid the safety problem brought by the existing galvanometer focusing method, and the cross line consists of two lines with different lengths.

Description

Laser galvanometer focus positioning device

Technical Field

The utility model relates to the technical field of laser galvanometer processing, in particular to a laser galvanometer focus positioning device.

Background

The laser galvanometer is a quick high-precision laser positioning device which is commonly used in laser marking and laser welding application. The laser beam is expanded by the beam expander, reflected by the reflectors which respectively control the motors in the X direction and the Y direction, focused by the field lens and finally focused to the focus position, so that energy output is realized, and marking and welding operations are completed.

The depth of field of the laser focusing spot is usually less than 1mm, and when the focal position is lower or higher than the actual processed object surface, the spot becomes large. When the defocusing amount is larger than the field depth range, the laser power density is finally lower than the energy threshold value, and the processing failure is caused.

Therefore, before operations such as laser marking or welding are carried out, the focus of the laser galvanometer needs to be positioned, the traditional galvanometer focusing method is mainly realized by adopting low-power light-emitting visual inspection or processing test of a laser, but the power of the laser for welding reaches thousands of watts or even tens of thousands of watts, and the high-power laser directly emits light to test the focal length, so that the adjustment is tedious, the focusing is not accurate, the economy is poor, and potential safety hazards are easy to occur.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a laser galvanometer focus positioning device, which can finish the calibration of the focus of a host laser without starting the high-power host laser.

In order to solve the technical problem, the laser galvanometer focus positioning device adopts the following technical scheme:

the laser galvanometer focus positioning device is used for realizing laser focusing of a host laser and comprises two laser tubes, the light path of each laser tube is a cross line, the connecting line of the intersection point of the cross line and the emitting point of the cross line is parallel to the light path of the host laser, and the cross line is composed of two lines with different lengths. Because the intersection point of the cross line light path sent by each laser tube and the connecting line of the emission point are parallel to the light path of the main laser, the focus of the host laser is positioned according to whether the two cross line light paths are superposed after being focused by the field lens, the starting of the high-power host laser for positioning the focus is replaced, the operation is simple, the focusing accuracy is high, the cost is low, the electric power of the cross line does not need to be very large, the safety problem brought by the existing vibrating mirror focusing method can be avoided, and the cross line is composed of two lines with different lengths.

Further, the cross line emitted by the laser tube is red light, and the electric power of the cross line is less than 1 watt.

Further, the included angle of the cross line is 90 degrees.

Further, the cross line is in a central symmetrical structure.

Furthermore, an adjustable fixing device for adjusting the pitching and direction angles of the light path is arranged on any laser tube.

Furthermore, a control port is arranged on the laser tube and used for receiving a signal of the controller and controlling the laser tube to be opened and closed.

Drawings

The utility model and its features, aspects and advantages will become better apparent from a reading of the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the utility model.

FIG. 1 is a schematic diagram of a focal point positioning device of a laser galvanometer according to the present invention;

FIG. 2 is a schematic diagram of a laser tube provided by the present invention;

FIG. 3 is a cross-line diagram of the focal point positioning device of the laser galvanometer provided by the utility model.

Detailed Description

The utility model provides a focal point positioning device of a laser galvanometer, which comprises two laser tubes 1 as shown in figure 1, wherein the light path of each laser tube 1 is a cross line, the connection line of the intersection point of the cross line and the emission point of the cross line is parallel to the light path of a host laser 2, the cross line consists of two lines with different lengths, the laser tubes 1 are parallelly arranged in an independent module, the independent module is integrally packaged in the galvanometer, and the coaxiality of the light path of the host laser 2 is realized through the galvanometer. When the laser tube 1 is started, the controller sends a starting signal to the control port of the laser tube 1, the laser tube 1 is opened, and because the intersection point of the cross line light path sent by each laser tube 1 and the connecting line of the emission point are parallel to the light path of the main laser, after the field lens focuses, two cross lines can be overlapped at the focus position of the main laser. If the surface of the processed object is not in the focus position, the two cross lines can generate deviation, so that the problem of starting a high-power host laser 2 to position the focus is solved, the operation is simple, the focusing accuracy is high, the cost is low, the electric power of the cross lines does not need to be large, the safety problem caused by the existing galvanometer focusing method can be avoided, the cross lines are composed of two lines with different lengths, when the two cross lines are superposed in the focus, the two short lines are superposed with the long line, the part of the center, which can be overlapped, can form a bright symmetrical cross indication pattern, and the part of the peripheral long line, which exceeds the short line, is darker than the center, so that the clearer, more definite and more intuitive focus positioning effect is realized.

In order to effectively avoid potential safety hazards, the light emitted by the laser tube 1 is red light with electric power less than 1 watt, which is lower than the standard of injury to human bodies, and the safety of the laser galvanometer focus positioning device during focus positioning is greatly improved.

In addition, the included angle of the cross line is set to be 90 degrees, the straight line is set to be in a central symmetry structure, the two characteristics are beneficial to observation, and compared with other angles and asymmetric indication graphs, the cross line is mistakenly considered to be distorted in the projection process during observation can be avoided.

In order to improve the accuracy of the focus positioning, the adjustable fixing device 3 is further arranged on any laser tube 1, specifically, the adjustable fixing device 3 is a three-way screw, and the pitching and direction angles of the cross line are adjusted and fixed through the three-way screw on the laser tube 1 according to the divergence angle of a certain distance, so that higher parallelism is realized, and the effect of improving the accuracy of the focus positioning is achieved.

In conclusion, the utility model effectively realizes that the focus of the host laser 2 can be calibrated without starting the high-power host laser 2.

Those skilled in the art will appreciate that variations may be implemented by those skilled in the art in combination with the prior art and the above-described embodiments, and will not be described in detail herein. Such variations do not affect the essence of the present invention and are not described herein.

The above description is of the preferred embodiment of the utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; it will be understood by those skilled in the art that various changes and modifications may be made, or equivalents may be modified, without departing from the spirit of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the protection scope of the technical solution of the present invention, unless the content of the technical solution of the present invention is departed from.

Claims

1. The laser galvanometer focus positioning device is used for realizing laser focusing of a host laser and is characterized by comprising two laser tubes, wherein the light path of each laser tube is a cross line, the connecting line of the intersection point of the cross line and the emitting point of the cross line is parallel to the light path of the host laser, and the cross line is composed of two lines with different lengths.

2. The apparatus of claim 1, wherein the laser tube emits a cross beam of red light, and the cross beam has an electrical power of less than 1 watt.

3. The apparatus of claim 1, wherein the cross line includes an angle of 90 degrees.

4. The apparatus of claim 1, wherein the cross-hair is a centrosymmetric structure.

5. The apparatus as claimed in claim 1, wherein the adjustable fixing means for adjusting the pitch and direction angles of the optical path is provided on any one of the laser tubes.

6. The apparatus as claimed in claim 1, wherein the laser tube has a control port, and the control port is used for receiving a signal from the controller and controlling the laser tube to open or close.