CN114888124A

CN114888124A - Temperature self-adaptation laser fire correction equipment

Info

Publication number: CN114888124A
Application number: CN202210217625.8A
Authority: CN
Inventors: 唐晟; 周鹏磊; 廖素英; 丛伯融; 耿伟豪
Original assignee: Beijing Tongfang Huaguang System Technology Co ltd
Current assignee: Beijing Tongfang Huaguang System Technology Co ltd
Priority date: 2022-03-07
Filing date: 2022-03-07
Publication date: 2022-08-12

Abstract

The invention discloses a temperature self-adaptive laser fire correcting device which can realize the fire calibration operation of a workpiece by utilizing the heating function of a laser beam. The invention has the advantages of more uniform heat of the acting surface and no damage to the base material. Meanwhile, consumables are not needed, only electric power is needed to be provided, and the operation cost is low. In addition, combustible gas supply is not needed, and the whole operation link is safe and reliable. More importantly, the temperature of the surface of the workpiece can be automatically controlled, and the consistency of the process is ensured.

Description

Temperature self-adaptation laser fire correction equipment

Technical Field

The invention relates to the technical field of metal part deformation correction, in particular to the field of flame correction of a ship structural part.

Background

The welding links can be involved in the manufacturing process of structural members such as ship hulls, bridges, vehicles, trains and the like, and the phenomenon of uneven surfaces often occurs after welding, and the reason is that the deformation is caused by uneven thermal stress caused by temperature difference. Most materials inevitably deform after welding, such as low-carbon steel, aluminum alloy and the like, and especially aluminum alloy materials have higher correction difficulty. The traditional flame straightening device adopts a flame heating mode, which is easy to cause the performance deterioration of materials and the phenomenon of 'necking' or 'orange peel' in local areas. The root cause of this problem is the uneven temperature distribution of the flame, which tends to cause local overheating. Meanwhile, the temperature control precision of the traditional means is low, and even only depending on the experience of operators, the stability of the process is further reduced.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a temperature self-adaptive laser fire correction system.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the utility model provides a temperature self-adaptation laser fire worker correct equipment which characterized in that, the component includes laser light source, laser transmission channel, laser emission head, control module, projection module.

Further, the laser light source may be any one of a fiber laser, a solid laser, a gas laser, a semiconductor laser, and the like that can generate laser light.

Further, the laser transmission channel can be an optical fiber, and can also be a space transmission channel constructed by a lens.

Furthermore, the laser emitting head comprises a laser collimation unit, a non-contact type temperature measuring instrument, a reflecting mirror and a dichroic mirror.

Furthermore, the laser alignment unit aims to ensure the alignment output of laser beams, the size of a light spot cannot change along with the change of a working distance, the consistency of the target light spot is ensured, the non-contact type temperature measuring instrument is used for measuring the temperature of the action position of the laser light spot and feeding back a temperature signal to the control module in real time, so that further temperature control processing is realized.

Furthermore, the reflecting mirror and the dichroic mirror are arranged in parallel in space, and both the reflecting mirror and the dichroic mirror form an included angle of 45 degrees with the axial direction of the laser beam or the non-contact type temperature measuring instrument, and ensure that the central extension line of the laser beam and the non-contact type temperature measuring instrument passes through the central points of the reflecting mirror and the dichroic mirror, so that the laser beam and the central axis of the non-contact type temperature measuring instrument are coaxial in space after final output.

Furthermore, the control module is used for collecting feedback signals of the non-contact type temperature measuring instrument, giving control signals to the laser through a temperature control algorithm and controlling the output power of the laser, so that the temperature control of the surface of the workpiece corrected by laser fire is realized, and meanwhile, the target temperature of the surface of the workpiece to be processed can be adjusted through the setting of a human-computer interface.

Furthermore, the projection module is used for projecting grid lines on the surface of the workpiece to be processed, the projected grid lines are bent when the plane is uneven, and the bending curvature of the projected grid lines is gradually reduced along with the application of the flame correction function, so that the correction effect can be visually displayed; meanwhile, the projection module can project relevant information such as workpiece temperature, laser output power and frequency to the surface of a machined workpiece, and the working state of the machine can be observed conveniently.

Compared with the prior art, the invention has the beneficial effects that:

1. the heat of the acting surface is more uniform, and the base material is not damaged;

2. no material consumption is needed, only electric power is needed, and the operation cost is low;

3. combustible gas supply is not needed, and the whole operation link is safe and reliable;

4. the surface temperature of the workpiece can be automatically controlled, and the consistency of the process is ensured.

Drawings

FIG. 1 is a schematic diagram of the temperature adaptive laser fire straightening apparatus of the present invention;

in the figure: 1-a laser light source; 2-a laser transmission channel; 3-a laser alignment unit; 4-a mirror; 5-a dichroic mirror; 6-a non-contact thermodetector; 7-a projection module; 8-a control module; 9-processing the workpiece; 10-point of action; 11-projecting grid lines; 12-job information; 13-projecting the display signal; 14-laser power control signal; 15-temperature analog signal

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1, an intelligent temperature-controlled fiber laser pyrotechnic correction device includes 1 semiconductor laser 1 with power of 2000W and wavelength of 915nm, and the laser is output in a mode of coupling by an optical fiber 2 to realize flexible transmission of laser. The output port of the optical fiber 2 is connected with the laser collimation unit 3, and the laser beam is expanded and collimated in the laser collimation unit 3 and then is adjusted into collimated light with the diameter of 20 mm. A reflector 4 with the diameter of 40mm is arranged at the position of 30mm at the front end of an output lens of the laser collimation unit 3, the reflectivity of a coating film of the reflector 4 at the position of 915nm is more than 99.5%, and thus collimated light beams are subjected to right-angle reflection. A dichroic mirror 5 with the diameter of 40mm is arranged right above a reflecting mirror 4, the coating of the mirror is 915nm light high reflection, the reflectivity is more than 99.5%, light with other wave bands is high transmission, a non-contact temperature measuring instrument 6 is arranged right behind the dichroic mirror 5, and the non-contact temperature measuring instrument 6 can effectively receive light with the wavelength of 1.4 mu m or other wave bands emitted by an acting surface, so that the temperature measurement is realized. A projection module 7 is arranged above the dichroic mirror 5, a semiconductor laser with the wavelength of 532nm can be adopted as a light source of the projection module 7, and different patterns or numbers can be presented on the surface of a processed workpiece 9 after the laser with the wavelength of 532nm is irradiated on a liquid crystal screen and passes through a focusing lens. In addition, the function of the control module 8 includes collecting a temperature analog signal 15 of the non-contact type temperature measuring instrument 6, performing PID algorithm calculation according to the signal, further outputting a control signal 14 of the laser power, adjusting and controlling the power of the laser 1, and realizing temperature control of the action point 10 on the processed workpiece 9. Finally, the control module 8 may also output a projection signal 13 to the projection module 7, so that the projection module projects a desired pattern and information, which includes the grid lines 11, the operation information 12 such as temperature and power, and the like.

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

Claims

1. The temperature self-adaptive laser fire correction equipment is characterized by comprising a laser light source, a laser transmission channel, a laser emitting head, a control module and a projection module.

2. The apparatus according to claim 1, wherein the laser light source comprises any one or more of a fiber laser, a solid laser, a gas laser, and a semiconductor laser.

3. The apparatus according to claim 1, wherein the transmission channel is a flexible transmission channel formed by an optical fiber or a spatial transmission channel formed by a lens.

4. The temperature-adaptive laser fire straightening device according to claim 1, wherein the laser emitting head comprises a laser collimating unit, a non-contact thermometer, a reflecting mirror and a dichroic mirror.

5. The temperature-adaptive laser fire straightening device as claimed in claim 4, wherein the laser collimating unit collimates and outputs the shaped laser beam to ensure that the size of the light spot does not change with the change of the working distance.

6. The temperature-adaptive laser fire correction device according to claim 4, wherein the reflecting mirror and the dichroic mirror are spatially arranged in parallel, and both the reflecting mirror and the dichroic mirror form an included angle of 45 degrees with an axial direction of the laser beam or the non-contact temperature measuring instrument, and ensure that a central extension line of the laser beam and the non-contact temperature measuring instrument passes through central points of the reflecting mirror and the dichroic mirror.

7. The temperature-adaptive laser fire straightening device according to claim 4, wherein the non-contact type temperature measuring instrument can be any instrument capable of measuring temperature in a non-contact manner, such as an infrared temperature measuring instrument or an infrared thermal imaging instrument.

8. The apparatus according to claim 1, wherein the reflector is any one of a mirror or a dichroic mirror, so long as it is ensured that the final output laser beam is coaxial with the measurement path of the non-contact type temperature measuring instrument.

9. The temperature-adaptive laser fire correction device according to claim 1, wherein the control module is capable of collecting feedback signals of the non-contact type temperature measuring instrument, giving control signals to the laser through a temperature control algorithm, and controlling the output power of the laser, so that temperature control of the surface of the workpiece corrected by laser fire is achieved, and meanwhile, the target temperature of the surface of the workpiece to be processed can be adjusted through human-computer interface setting.

10. The temperature-adaptive laser fire straightening device as claimed in claim 1, wherein the projection module projects grid lines on the surface of the workpiece to be machined, and the projection module projects the workpiece temperature and laser-related working information on the surface of the workpiece to be machined.