CN211162421U - High-precision visual positioning conveying line and laser marking machine with same - Google Patents

Abstract

The utility model discloses a high accuracy vision positioning transfer chain and have its laser marking machine, this high accuracy vision positioning transfer chain still includes: the conveying assembly comprises an annular conveying belt, the annular conveying belt is a light-transmitting component, and a conveying surface is arranged on the annular conveying belt; the visual inspection device comprises a camera, and the camera is arranged towards the conveying surface; the light source device comprises a lamp, the lamp is connected with the rack, the lamp is located on one side, away from the camera, of the conveying surface, and the lamp faces the conveying surface. The utility model discloses a high accuracy vision positioning transfer chain and have its laser marking machine owing to set up the lamps and lanterns that set up towards the transport surface, lamps and lanterns are luminous under the operating condition and are seen through the work piece that outside established is shone through transparent endless conveyor, and the boundary of work piece can comparatively clearly throw to the camera, improves visual detection device's precision.

Description

High-precision visual positioning conveying line and laser marking machine with same

Technical Field

The utility model relates to a vision acquires technical field, in particular to high accuracy vision positioning transfer chain and has its laser marking machine.

Background

The conveying line is one of the most widely applied parts in modern industrial automation. For the accuracy of the automated processing, it is often necessary to equip the conveyor line with a corresponding visual inspection device in order to obtain the position of the work pieces on the conveyor line more accurately. In the existing visual detection device, a camera is mostly vertically aligned to a conveying surface on an annular conveying belt, an image is obtained by utilizing light reflection in a natural environment, and the position of a workpiece is obtained according to the image so as to be used by other devices for judging the position of the workpiece and processing the workpiece. The existing mode realizes the visual positioning of the workpiece, but in the application process, when the light in the natural environment changes or the light condition is not good, the image boundary acquired by the visual detection device is fuzzy, and the position of acquiring the workpiece is inaccurate.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a high accuracy vision positioning transfer chain and have its laser marking machine.

The utility model provides a high accuracy vision positioning transfer chain, including the frame, this high accuracy vision positioning transfer chain still includes:

The conveying assembly comprises a first roller, a second roller, a driving device and an annular conveying belt, the first roller and the second roller are rotatably connected with the rack, the first roller and the second roller are positioned on the inner side of the annular conveying belt, the first roller and the second roller are abutted against the annular conveying belt, the driving device is in driving connection with the first roller and/or the second roller to enable the first roller and the second roller to jointly support the annular conveying belt to circularly operate, the annular conveying belt is a light-transmitting component, and a conveying surface is arranged on the annular conveying belt;

A vision inspection device comprising a camera disposed toward the conveying surface;

The light source device comprises a lamp, the lamp is located on one side, far away from the camera, of the conveying surface, and the lamp faces the conveying surface.

The utility model provides a high accuracy vision positioning transfer chain has following beneficial effect at least: when the peripheral workpiece is conveyed between the lamp and the camera on the conveying surface, the lamp arranged towards the conveying surface is arranged, the lamp emits light to irradiate the peripheral workpiece through the transparent annular conveying belt in the working state, the boundary of the workpiece can be clearly projected to the camera, and therefore the precision of the visual detection device is improved.

As a sub-solution of the above technical solution, an inner space is defined by an inner side of the endless conveyor belt, and the lamp is fixedly disposed in the inner space. With lamps and lanterns setting in the inner space, the light of lamps and lanterns sees through the annular conveyer belt directive camera of individual layer, and the illumination intensity of light is better, receives annular conveyer belt's influence littleer.

As a sub-solution of the above technical solution, the endless conveyor belt is provided with a positioning strip. By arranging the positioning strip, the position of the workpiece can be more conveniently determined by using the positioning strip as a reference.

As some sub-solutions to the above solution, the positioning strip is located on an outer side surface of the endless conveyor belt. The positioning strip is arranged on the outer side surface of the workpiece, so that the positioning strip can be prevented from influencing the transmission of the annular conveying belt.

As a sub-solution of the above technical solution, the positioning strip is ring-shaped, and the shape of the positioning strip matches with the shape of the endless conveyor belt. The location strip is the annular and shape and endless conveyor's shape phase-match, and the location strip is continuous along endless conveyor's surface promptly, can avoid the work piece to place when on the location strip one end and conveyer belt surface butt and lead to placing not smooth.

As some sub-solutions of the above solution, the first roller has a first rotation axis, and a plurality of the positioning strips are arranged in parallel along an extending direction of the first rotation axis. Set up many location strips, provide the benchmark of a plurality of location on the one hand, on the other hand, the surface that the conveyer belt was kept away from to the location strip can provide the plane of placing the work piece, avoids the great work piece of size to lie flat on single location strip difficultly.

As some sub-schemes of the above technical scheme, the visual inspection device further comprises a light guide tube, the light guide tube is installed on one side of the camera close to the conveying surface, the camera comprises a shooting opening, the shooting opening faces towards the inner side of the light guide tube, and the shooting opening is communicated with the conveying surface through the light guide tube. Through setting up the light guide tube, can reduce the possibility that outside light got into the camera effectively to it is less that the influence that receives external environment when acquireing the image is less.

The utility model provides a laser marking machine, include: the high-precision visual positioning conveying line and the laser marking mechanism in any technical scheme are characterized in that the laser marking mechanism comprises a lifting mechanism, a laser marking head and a semi-transparent and semi-reflective mirror, the lifting mechanism is installed on the frame, the laser marking head is in driving connection with the lifting mechanism, the laser marking head comprises a laser emitting port, the laser emitting port is transversely arranged, the semi-transparent and semi-reflective mirror is arranged outside the laser emitting port and is obliquely arranged, the distance between one end, close to the conveying surface, of the semi-transparent and semi-reflective mirror and the laser emitting port is larger than the distance between one end, far away from the conveying surface, of the semi-transparent and semi-reflective mirror and the laser emitting port, the included angle between the laser emitting port and the semi-transparent and semi-reflective mirror is 45 degrees, and the camera is located on one side, far away from the conveying surface, of the semi-transparent and semi, the camera is vertically arranged and comprises a shooting port, and an included angle between the shooting port and the semi-transparent semi-reflecting mirror is 45 degrees.

The utility model discloses a laser marking machine, owing to adopted any technical scheme of above-mentioned arbitrary technical scheme high accuracy visual positioning transfer chain, consequently it also has any technical scheme of above-mentioned high accuracy visual positioning transfer chain's beneficial effect, in addition, the utility model discloses a laser marking mechanism is through setting up semi-transparent semi-reflecting mirror to be 45 with the angle that laser emission mouth and shooting mouth configuration were become with semi-transparent semi-reflecting mirror, from this, the light path of laser emission mouth and shooting mouth is through semi-transparent semi-reflecting mirror's refraction and reflection back, can be coaxially directional transport face, thereby when the focus position of adjusting laser marking head, can directly adjust under the prerequisite that need not to the image that the camera was shot through the conversion, be favorable to simplifying program design.

The utility model discloses still provide another laser marking machine, including any one of the above-mentioned technical scheme high accuracy vision positioning transfer chain, elevating system and another kind of laser marking mechanism, elevating system installs in the frame, laser marking mechanism includes the laser marking head, the laser marking head with the elevating system drive is connected, the laser marking head is installed in the frame, the laser marking head orientation the transport surface sets up. The utility model discloses a laser marking machine owing to adopted arbitrary technical scheme of above-mentioned high accuracy vision positioning transfer chain, consequently it also has arbitrary technical scheme of above-mentioned high accuracy vision positioning transfer chain's beneficial effect, adopt this laser marking machine then to have laser marking head and camera and arrange nimble advantage.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a first embodiment of a laser marking machine;

FIG. 2 is a schematic structural view of a delivery assembly;

FIG. 3 is a cross-sectional structural schematic view of the transfer assembly;

FIG. 4 is a schematic right-view structural diagram of a first embodiment of a laser marking machine, in which the light path is indicated by the dashed line;

Fig. 5 is a schematic right-view structural diagram of the second embodiment.

In the drawings: 110-a first roller; 120-a second roller; 130-a drive device; 140-endless conveyor belt; 150-positioning strips; 210-a camera; 220-a light guide cylinder; 310-a lifting mechanism; 320-laser marking head; 410-a lamp; 500-half mirror.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of terms means an indefinite amount, and a plurality of terms means two or more, and the terms greater than, less than, exceeding, etc. are understood to include no essential numbers, and the terms greater than, less than, within, etc. are understood to include essential numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated. Additionally, appearing throughout and/or representing three side-by-side scenarios, e.g., A and/or B represents a scenario satisfied by A, a scenario satisfied by B, or a scenario satisfied by both A and B.

In the description of the present invention, if there is a phrase containing a plurality of parallel features, the phrase defined therein is the closest feature, for example: b, C disposed on A, E connected to D, B disposed on A, E connected to D, C is not limited; however, terms indicating relationships between features such as "spaced apart", "arranged in a ring", etc. do not fall within this category. The phrase preceded by the word "mean" indicates that it is a definition of all features in the phrase, and if it is B, C, D, it indicates that both B, C and D are located on a.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 4, the utility model provides an embodiment of high accuracy vision positioning transfer chain, it includes the frame, and this high accuracy vision positioning transfer chain still includes: a conveying component, a visual detection device and a light source device,

The conveying assembly comprises a first roller 110, a second roller 120, a driving device 130 and an annular conveying belt 140, wherein the first roller 110 and the second roller 120 are rotatably connected with the rack, the first roller 110 and the second roller 120 are positioned on the inner side of the annular conveying belt 140, the first roller 110 and the second roller 120 are abutted against the annular conveying belt 140, the driving device 130 is in driving connection with the first roller 110 and/or the second roller 120 so that the first roller 110 and the second roller 120 jointly support the annular conveying belt 140 to rotate circularly, the annular conveying belt 140 is a light-transmitting component, and a conveying surface is arranged on the annular conveying belt 140;

The visual inspection device comprises a camera 210, and the camera 210 is arranged towards the conveying surface;

The light source device comprises a lamp 410, the lamp 410 is connected with the frame, the lamp 410 is located on one side of the conveying surface far away from the camera 210, and the lamp 410 is arranged towards the conveying surface.

When the peripheral workpiece is conveyed between the lamp 410 and the camera 210 on the conveying surface, because the lamp 410 arranged towards the conveying surface is arranged, the lamp 410 emits light to irradiate the peripheral workpiece through the transparent annular conveying belt 140 in a working state, the boundary of the workpiece can be projected to the camera 210 more clearly, and the precision of the visual detection device is improved.

Further in this embodiment, the driving device 130 is drivingly connected to the first roller 110. The drive means 130 may be a stepper motor, a servo motor or the like, the main effect of which is to provide a rotary output shaft. The endless conveyor 140 may be made of flexible light-transmitting material such as flexible PVC. The rack is provided with a first transverse shaft and a second transverse shaft which are both transversely arranged, the first roller 110 is sleeved outside the first transverse shaft and is rotatably connected with the first transverse shaft, and the second roller 120 is sleeved outside the second transverse shaft and is rotatably connected with the second transverse shaft. The endless conveyor belt 140 is arranged in a horizontal direction, and the conveying surface is the top surface of the endless conveyor belt 140, the camera 210 is located above the conveying surface, and the lamp 410 is located below the conveying surface. The lamp 410 is a borderless lamp in the present embodiment, but is not limited thereto. The lamp 410 may be provided in only one or a plurality of the lamps may be provided at intervals.

Further, the inner side of the endless conveyor belt 140 defines an inner space, and the lamp 410 is fixedly disposed in the inner space. Further, the lamp 410 is fixed to the frame. The lamps 410 are arranged in the inner space, light rays of the lamps 410 penetrate through the single-layer annular conveying belt 140 to be emitted to the camera 210, the light intensity of the light rays is better, and the influence of the annular conveying belt 140 is smaller.

Further, the endless conveyor belt 140 is provided with a positioning bar 150. In this embodiment, the positioning strip 150 is formed integrally with the conveyor belt, in other embodiments, the conveyor belt may also be formed in a non-integrally-formed manner, and by providing the positioning strip 150, the position of the workpiece can be determined more conveniently by using the positioning strip 150 as a reference.

Specifically, the registration bar 150 is located on an outer side surface of the endless conveyor belt 140. The positioning bars 150 are provided on the outer side surface of the endless conveyor belt 140, and the positioning bars 150 can be prevented from affecting the transmission of the endless conveyor belt 140. The positioning strip 150 is in a ring shape, and the shape of the positioning strip 150 matches with the shape of the endless conveyor belt 140. The positioning strip 150 is annular and has a shape matched with that of the endless conveyor belt 140, that is, the positioning strip 150 is continuous along the surface of the endless conveyor belt 140, so that the uneven placement caused by the fact that one end of the workpiece is abutted against the surface of the conveyor belt when the workpiece is placed on the positioning strip 150 can be avoided. The first roller 110 has a first rotation axis, and a plurality of the positioning bars 150 are arranged in parallel along an extending direction of the first rotation axis. Set up many location strips 150, provide the benchmark of a plurality of location on the one hand, on the other hand, the surface that the conveyer belt was kept away from to location strip 150 can provide the plane of placing the work piece, avoids the great work piece of size to lie flat on single location strip 150 difficultly.

Further, the visual inspection device still includes a light guide tube 220, the light guide tube 220 is installed camera 210 is close to one side of transport face, camera 210 is including shooing the mouth, it faces to shoot the mouth light guide tube 220's inboard setting, shoot the mouth through light guide tube 220 with transport face intercommunication. By providing the light guide tube 220, the possibility that external light enters the camera 210 can be effectively reduced, so that the camera 210 is less affected by the external environment when acquiring images.

The utility model discloses still provide the first embodiment of laser marking machine, this laser marking machine includes: the high-precision visual positioning conveying line and the laser marking mechanism according to any of the above embodiments, the laser marking mechanism includes an elevating mechanism 310, a laser marking head 320 and a half mirror 500, the elevating mechanism 310 is installed on the frame, the laser marking head 320 is in driving connection with the elevating mechanism 310, the laser marking head 320 includes a laser emitting port, the laser emitting port is transversely disposed, the half mirror 500 is disposed outside the laser emitting port, the half mirror 500 is obliquely disposed, a distance between one end of the half mirror 500 close to the conveying surface and the laser emitting port is greater than a distance between one end of the half mirror 500 far from the conveying surface and the laser emitting port, an included angle between the laser emitting port and the half mirror 500 is 45 °, the camera 210 is located on one side of the half mirror 500 far from the conveying surface, the camera 210 is vertically arranged, the camera 210 includes a shooting opening, and an included angle between the shooting opening and the half-transmitting and half-reflecting mirror 500 is 45 °.

Specifically, the lifting mechanism 310 is a screw mechanism driven by a hand wheel in this embodiment, and a linear module, a lifting table, etc. may be used in other embodiments. The half mirror 500 is fixed to the laser marking head 320 through the light guide tube 220, and at this time, a through opening for communicating the light path of the laser marking head 320 is formed in the light guide tube 220. The camera 210 is fixedly connected to the light guide tube 220, and the connection position is located above the half mirror 500. In the embodiment without the light guide tube 220, both the half mirror 500 and the camera 210 can be directly fixed to the laser marking head 320 or the lifting mechanism 310, so that both the half mirror 500 and the camera 210 move synchronously with the laser marking head 320, and the laser marking head 320 and the camera 210 are ensured to coaxially emit to the conveying surface after the optical path of the laser marking head 320 and the camera 210 is changed by the half mirror 500.

Owing to adopted any technical scheme high accuracy vision positioning transfer chain, consequently it also has any technical scheme above high accuracy vision positioning transfer chain's beneficial effect, in addition, the utility model discloses a laser marking mechanism is through setting up semi-transparent half mirror 500 to with laser emission mouth and shooting mouth configuration for with semi-transparent half mirror 500 angle be 45, from this, the light path of laser emission mouth and shooting mouth is behind semi-transparent half mirror's refraction and reflection, can point to the transport face coaxially, thereby when the focus position of mark 320 is beaten to the adjustment laser, can directly adjust under the prerequisite of image process conversion that need not to shoot camera 210, be favorable to simplifying program design.

Referring to fig. 5, the utility model provides a laser marking machine's second kind embodiment still, this laser marking machine include any technical scheme of above-mentioned high accuracy visual positioning transfer chain, elevating system 310 and another kind of laser marking mechanism, laser marking mechanism includes laser marking head 320, laser marking head 320 is installed in the frame, laser marking head 320 orientation the transport face sets up. The utility model discloses a laser marking machine, owing to adopted arbitrary technical scheme of above-mentioned high accuracy vision positioning transfer chain, consequently it also has arbitrary technical scheme of above-mentioned high accuracy vision positioning transfer chain's beneficial effect, in addition, this laser marking machine compares first embodiment and has cancelled semi-transparent half mirror 500, the installation angle and the mounted position of laser marking head 320 and camera 210 all can arrange in a flexible way as required, the embodiment of adopting this laser marking machine and first laser marking machine compares then to have laser marking head 320 and camera 210 and arrange nimble advantage.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments, but is capable of various changes and modifications without departing from the spirit of the invention.

Claims (9)

1. High accuracy vision positioning transfer chain, including the frame, its characterized in that: further comprising:

The conveying assembly comprises a first roller (110), a second roller (120), a driving device (130) and an annular conveying belt (140), wherein the first roller (110) and the second roller (120) are rotatably connected with the rack, the first roller (110) and the second roller (120) are positioned on the inner side of the annular conveying belt (140), the first roller (110) and the second roller (120) are abutted against the annular conveying belt (140), the driving device (130) is in driving connection with the first roller (110) and/or the second roller (120) to enable the first roller (110) and the second roller (120) to jointly support the annular conveying belt (140) to circularly operate, the annular conveying belt (140) is a light-transmitting component, and a conveying surface is arranged on the annular conveying belt (140);

A visual inspection device comprising a camera (210), the camera (210) being disposed toward the conveying surface;

The light source device comprises a lamp (410), the conveying surface is used as an interface, the lamp (410) and the camera (210) are respectively arranged on two opposite sides of the conveying surface, and the lamp (410) faces the conveying surface.

2. The high-precision vision positioning conveyor line according to claim 1, characterized in that: the inner side of the endless conveyor belt (140) defines an inner space, and the lamp (410) is fixedly arranged in the inner space.

3. The high-precision vision positioning conveyor line according to claim 1, characterized in that: the annular conveying belt (140) is provided with a positioning strip (150).

4. The high-precision vision positioning conveyor line according to claim 3, characterized in that: the positioning strip (150) is located on an outer side surface of the endless conveyor belt (140).

5. The high-precision vision positioning conveyor line according to claim 4, characterized in that: the positioning strip (150) is annular, and the shape of the positioning strip (150) is matched with that of the annular conveying belt (140).

6. The high-precision vision positioning conveyor line according to claim 4, characterized in that: the first roller (110) has a first rotation axis, and a plurality of the positioning bars (150) are arranged in parallel along an extending direction of the first rotation axis.

7. The high-precision vision positioning conveyor line according to claim 1, characterized in that: the visual detection device further comprises a light guide cylinder (220), the light guide cylinder (220) is installed on one side, close to the conveying surface, of the camera (210), the camera (210) comprises a shooting opening, the shooting opening faces towards the inner side of the light guide cylinder (220), and the shooting opening is communicated with the conveying surface through the light guide cylinder (220).

8. Laser marking machine, its characterized in that: the method comprises the following steps:

The high-precision vision positioning conveyor line according to any one of claims 1 to 7;

Laser marking mechanism, laser marking mechanism includes:

A lifting mechanism (310), the lifting mechanism (310) being mounted on the frame;

The laser marking head (320), the laser marking head (320) is in driving connection with the lifting mechanism (310), the laser marking head (320) comprises a laser emitting opening, and the laser emitting opening is transversely arranged;

Semi-transparent half mirror (500), establish semi-transparent half mirror (500) outside the lasing mouth, semi-transparent half mirror (500) slope sets up, semi-transparent half mirror (500) are close to carry the one end of face with distance between the lasing mouth is greater than semi-transparent half mirror (500) are kept away from carry the one end of face with distance between the lasing mouth, the lasing mouth with contained angle between semi-transparent half mirror (500) is 45, camera (210) are located semi-transparent half mirror (500) are kept away from carry one side of face, camera (210) vertical arrangement, camera (210) are including shooing the mouth, shoot the mouth with contained angle between semi-transparent half mirror (500) is 45.

9. Laser marking machine, its characterized in that: the method comprises the following steps:

The high-precision vision positioning conveyor line according to any one of claims 1 to 7;

A lifting mechanism (310), the lifting mechanism (310) being mounted on the frame;

The laser marking mechanism comprises a laser marking head (320), the laser marking head (320) is in driving connection with the lifting mechanism (310), and the laser marking head (320) faces the conveying surface.

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