CN216881726U

CN216881726U - Laser light path precision calibration platform

Info

Publication number: CN216881726U
Application number: CN202123095279.0U
Authority: CN
Inventors: 潘良明; 何涛; 刘鑫炎; 邝晓聪
Original assignee: Hunan Farsoon High Tech Co Ltd
Current assignee: Hunan Farsoon High Tech Co Ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-07-05
Anticipated expiration: 2031-12-10

Abstract

The utility model provides a laser light path accurate calibration platform, which comprises a supporting rack, the camera, backlight and printing opacity glass, the support frame includes four stands, the bottom plate, first backup pad and second backup pad, the bottom of four stands respectively is equipped with a machine foot, the bottom plate, first backup pad, the second backup pad is overlapped from bottom to top in proper order and is located on four stands, and the bottom plate, it has the preset distance to reserve between first backup pad and the second backup pad, the camera is installed in the second backup pad, printing opacity glass installs on first backup pad, printing opacity glass is used for placing the film that awaits measuring, the backlight is installed on the bottom plate, so that the backlight shines the film that awaits measuring, the camera is aimed at the film that awaits measuring and is shot and is obtained data, and accomplish the accurate calibration work of laser light path through data analysis. The utility model utilizes the image recognition technology to measure the dot matrix actually printed on the film to be measured and compares the dot matrix with the theoretical dot matrix table of the galvanometer system, thereby analyzing and finishing the precise calibration work of the laser light path.

Description

Laser light path precision calibration platform

Technical Field

The utility model relates to the technical field of laser sintering, in particular to a laser light path precise calibration platform.

Background

The basic process of the selective laser sintering process is as follows: a piston lifting mechanism in the powder feeding cylinder sends a certain amount of powder to a workbench surface, a powder paving mechanism paves a layer of powder material on the upper surface of a molded part of the workbench, and a vibrating mirror system controls a laser to scan a solid part powder layer according to the section outline of the layer so as to melt the powder and realize melting with the molded part below; after one layer of cross section is sintered, the sintered plate in the forming cylinder is lowered by one layer, the powder spreading mechanism is spread with one layer of homogeneous and compact powder, the new layer of cross section is scanned and sintered, and the sintered plate is superposed through several layers of scanning until the whole prototype is manufactured.

In the above technology, the 3D printing apparatus generally needs to perform a precise calibration operation on the laser path before formal sintering. However, the current laser path calibration mainly has the following problems: the calibration precision is low and the error is large; and the calibration efficiency is low, and the calibration can be completed by repeating the steps for multiple times.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems in the prior art, the utility model provides the laser light path precise calibration platform which is simple in structure and convenient to calibrate.

In order to achieve the purpose, the utility model provides a laser light path precise calibration platform which comprises a support frame, a camera, a backlight source and transparent glass, wherein the support frame comprises four stand columns, a bottom plate, a first supporting plate and a second supporting plate, the bottoms of the four stand columns are respectively provided with a machine foot, the bottom plate, the first supporting plate and the second supporting plate are sequentially sleeved on the four stand columns from bottom to top, preset distances are reserved among the bottom plate, the first supporting plate and the second supporting plate, the camera is installed on the second supporting plate, the transparent glass is installed on the first supporting plate and used for placing a film to be tested, the backlight source is installed on the bottom plate so that the backlight source can shine the film to be tested, the camera is used for shooting the film to be tested to obtain data, and the precise calibration work of the laser light path is completed through data analysis.

As a further preferable mode of the present invention, the upright is of a threaded structure, the first support plate is fixed to the upright by a first adjustment nut and is adjustable in position on the upright, and the second support plate is fixed to the upright by a second adjustment nut and is adjustable in position on the upright.

As a further preferable scheme of the present invention, the distance between the first supporting plate and the second supporting plate is adjusted so that the analog light beam of the camera can cover the whole film to be measured.

As a further preferable aspect of the present invention, the first support plate and the second support plate are respectively adjusted to be in a horizontal state by adjusting the first adjusting nut and the second adjusting nut.

As a further preferable scheme of the present invention, the light-transmitting glass is fixedly mounted on the first support plate through at least one set of limiting pressing blocks.

As a further preferable scheme of the present invention, the number of the limiting pressing blocks is four, and the limiting pressing blocks are respectively located around the first supporting plate.

As a further preferable aspect of the present invention, the camera is a CCD high-definition camera, and is mounted at a central position of the second support plate.

As a further preferable scheme of the present invention, light-shielding enclosures are installed around and on the top of the supporting plate, and the light-shielding enclosures located around are respectively fixed between the two columns through fixing blocks, so that the supporting frame forms a closed space.

As a further preferable aspect of the present invention, one of the light-shielding cases is provided with a movable door, and the movable door is mounted on the light-shielding case by a hinge.

As a further preferable aspect of the present invention, a lock is mounted on the movable door.

The embodiment of the utility model has the beneficial effects that:

the utility model provides a laser light path precise calibration platform which is mainly applied to laser light path precise calibration and comprises a support frame, a camera, a backlight source and transparent glass, wherein the support frame comprises four upright posts, a bottom plate, a first support plate and a second support plate, the bottoms of the four upright posts are respectively provided with a machine foot, the bottom plate, the first support plate and the second support plate are sequentially sleeved on the four upright posts from bottom to top, preset distances are reserved among the bottom plate, the first support plate and the second support plate, the camera is arranged on the second support plate, the transparent glass is arranged on the first support plate and is used for placing a film to be tested, the backlight source is arranged on the bottom plate so as to enable the backlight source to shine the film to be tested, the camera is used for photographing the film to be tested to obtain data, and the precise calibration work of the laser light path is completed through data analysis, the method has the advantages that the dot matrix actually printed on the film to be tested is measured by utilizing an image recognition technology, the dot matrix is compared with a theoretical dot matrix table of the galvanometer system, and the accurate calibration work of the laser light path is completed through analysis, so that the printing precision of the 3D printing equipment is guaranteed. Namely, the utility model can quickly and accurately carry out precise calibration operation on the laser light path.

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 will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic diagram of an internal structure of an embodiment of a laser optical path precision calibration platform according to the present invention;

fig. 2 is an external view of fig. 1.

Icon:

1. CCD high definition digtal camera, 2, second adjusting nut, 3, second backup pad, 4, stand, 5, first adjusting nut, 6, first backup pad, 7, spacing compact heap, 8, fixed block, 9, bottom plate, 10, backlight, 11, the film that awaits measuring, 12, machine foot, 13, printing opacity glass, 14, analog beam, 15, dodge gate, 16, lock, 17, hinge, 18, shading housing.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 and 2, the laser light path precise calibration platform provided by the utility model comprises a support frame, a camera, a backlight source 10 and a transparent glass 13, wherein the support frame comprises four upright posts 4, a bottom plate 9, a first support plate 6 and a second support plate 3, the bottoms of the four upright posts 4 are respectively provided with a stand bar 12, the bottom plate 9, the first support plate 6 and the second support plate 3 are sequentially sleeved on the four upright posts 4 from bottom to top, preset distances are reserved among the bottom plate 9, the first support plate 6 and the second support plate 3, the camera is installed on the second support plate 3, the transparent glass 13 is installed on the first support plate 6, the transparent glass 13 is used for placing a film 11 to be tested, the backlight source 10 is installed on the bottom plate 9 so that the backlight source 10 polishes the film 11 to be tested, the camera shoots the film 11 to be tested to obtain data by shooting, and the precise calibration work of the laser light path is completed through data analysis.

Further referring to fig. 1 and 2, through holes are formed around the bottom plate 9, the first supporting plate 6 and the second supporting plate 3, and the four through holes are used for sleeving the four upright posts 4. The bottom plate 9 and the first supporting plate 6 preferably adopt solid plates due to large occupied area of objects to be supported, and the second supporting plate 3 preferably adopts a support structure due to small camera to be supported and only needs to be located at the center, namely, the middle of the second supporting plate 3 is a small solid plate, the periphery of the second supporting plate is a rectangular frame, and the middle of the second supporting plate is connected with the small solid plate and the rectangular frame through four cross rods.

In a preferred embodiment, the upright 4 is a screw structure, the first support plate 6 is fixed to the upright 4 by a first adjusting nut 5 and is adjustable in position on the upright 4, and the second support plate 3 is fixed to the upright 4 by a second adjusting nut 2 and is adjustable in position on the upright 4. This ensures the field of view of the camera by adjusting the distance between the first support plate 6 and the second support plate 3 to a suitable value, i.e. so that the analog light beam 14 of the camera covers the whole film 11 to be measured. Before the laser light path precise calibration platform is tested, the first support plate 6 and the second support plate 3 are respectively adjusted to be in a horizontal state by adjusting the first adjusting nut 5 and the second adjusting nut 2.

In a specific implementation, the transparent glass 13 is fixedly mounted on the first support plate 6 through at least one set of limiting pressing blocks 7. Preferably, the number of the limiting compression blocks 7 is four, and the limiting compression blocks are respectively positioned around the first supporting plate 6, so that the transparent glass 13 can be well limited and compressed.

As shown in fig. 1, the camera is preferably a CCD high-definition camera 1, and is mounted at the center of the second support plate 3.

In order to better ensure the calibration effect, in a preferred embodiment, the light shielding cover 18 is installed around and on the top of the supporting plate, and the light shielding cover 18 located around is respectively fixed between the two upright posts 4 through the fixing block 8, so that the supporting frame forms a closed space. In a specific implementation, the light-shielding case 18 on each side may be formed by one flat plate or by splicing two flat plates, and each flat plate is fixed by one fixing block 8. Further preferably, one of the light shielding cases 18 is provided with a movable door 15, and the movable door 15 is mounted on the light shielding case 18 through a hinge 17. Preferably, a lock 16 is further installed on the movable door 15. Thus, during the calibration of the present invention, the shutter 15 is closed; after calibration is finished, the lock 16 is rotated, the movable door 15 is opened, the film 11 to be tested is taken out, and the operation is repeated for several times, so that the operation can be finished once.

In order to make those skilled in the art better understand and implement the technical solution of the present invention, the following specifically describes the working process of an embodiment provided by the present invention:

firstly, before accurate calibration, a film needs to be placed in a working area of a 3D printing device, a laser emits light, a plurality of cross lattices are printed on the film, and the printed film is called as a film 11 to be tested.

Then, the distance and the parallelism between the CCD high-definition camera 1 and the translucent glass 13 are manually adjusted, and the field of view and the focal length of the CCD high-definition camera 1 are manually adjusted.

Finally, the film 11 to be measured is placed on the transparent glass 13 in the laser light path precise calibration platform, the backlight source 10 is opened, the movable door 15 is closed, the CCD high-definition camera 1 is used for aligning the film 11 to be measured to photograph, photographing data are checked according to results in software, specifically, the photographing data can be compared with a theoretical dot matrix table of a galvanometer system to find out points with larger errors and correct the points, and therefore the precise calibration work of the laser light path is completed. It should be noted that the innovation and protection of the present invention mainly relates to the structure of the laser optical path fine calibration platform composed of the above components, and the prior art of how to perform calibration according to the photographing data belongs to the field, that is, the actual data and the theoretical data can be compared to see whether there is a deviation, that is, whether calibration is required can be obtained, and therefore, the specific calibration method is not protected and limited in the present application.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a laser light path accurate calibration platform, its characterized in that, includes support frame, camera, backlight and printing opacity glass, the support frame includes four stands, bottom plate, first backup pad and second backup pad, the bottom of four stands respectively is equipped with a undercarriage, bottom plate, first backup pad, second backup pad overlap from bottom to top in proper order and locate four stands on, and all reserve between bottom plate, first backup pad and the second backup pad and have the preset distance, the camera is installed in the second backup pad, printing opacity glass installs on first backup pad, printing opacity glass is used for placing the film that awaits measuring, the backlight is installed on the bottom plate to make the backlight polish to the film that awaits measuring, the camera is aimed at the film that awaits measuring and is shot and obtain data, and accomplish the accurate calibration work of laser light path through data analysis.

2. The laser optical path fine calibration platform according to claim 1, wherein: the stand is helicitic texture, first backup pad is fixed in on the stand and the position on the stand is adjustable through first adjusting nut, the second backup pad is fixed in on the stand and the position on the stand is adjustable through second adjusting nut.

3. The laser optical path fine calibration platform according to claim 2, wherein: the distance between the first supporting plate and the second supporting plate is adjusted, so that the simulation light beam of the camera can cover the whole film to be tested.

4. The laser optical path fine calibration platform of claim 3, wherein: the first supporting plate and the second supporting plate are respectively adjusted to be in a horizontal state by adjusting the first adjusting nut and the second adjusting nut.

5. The laser optical path fine calibration platform of claim 1, wherein: the light-transmitting glass is fixedly arranged on the first supporting plate through at least one group of limiting pressing blocks.

6. The laser optical path fine calibration platform according to claim 5, wherein: the number of the limiting pressing blocks is four, and the limiting pressing blocks are located on the periphery of the first supporting plate respectively.

7. The laser optical path fine calibration platform according to claim 1, wherein: the camera is a CCD high-definition camera and is installed at the center of the second supporting plate.

8. The laser optical path fine calibration platform according to any one of claims 1 to 7, wherein: shading cover cases are installed around and at the top of the supporting plate, and the shading cover cases located around are fixed between the two stand columns through fixing blocks respectively, so that the supporting frame forms a closed space.

9. The laser optical path fine calibration platform of claim 8, wherein: one of the shading housings is provided with a movable door, and the movable door is arranged on the shading housing through a hinge.

10. The laser optical path fine calibration platform of claim 9, wherein: the movable door is provided with a lock.