WO2013010347A1

WO2013010347A1 - Method for detecting suction nozzle fault and device thereof

Info

Publication number: WO2013010347A1
Application number: PCT/CN2011/079780
Authority: WO
Inventors: 盛世纬
Original assignee: 富社（上海）商贸有限公司
Priority date: 2011-07-15
Filing date: 2011-09-16
Publication date: 2013-01-24
Also published as: CN102331426A; CN102331426B

Abstract

The present invention provides a method for detecting a suction nozzle fault, comprising: casting a light ray into a suction nozzle inner hole from either end of a suction nozzle; collecting, at the other end of the suction nozzle, an image of the light ray passing through the suction nozzle inner hole; determining, through analyzing the image, whether the suction nozzle has any fault. Corresponding to the method, also provided is a device for detecting a suction nozzle fault, comprising a detection support and a light source fixed on the detection support. An end of a suction nozzle to be detected is a suction port, and the other end is a connection port. The suction nozzle is disposed above the light source, and the suction port or connection port of the suction nozzle is aligned with the light source. The image can reflect the condition in the suction nozzle inner hole to help determine whether the suction nozzle has a fault such as blocking or fracture, thereby comprehensively detecting the condition of the suction nozzle inner hole.

Description

Method and device for detecting nozzle failure

Technical field

The invention belongs to the field of detection, and particularly relates to fault detection of spare parts used in patch work.

Background technique

At present, in order to pursue electronic products or devices with more powerful functions and smaller size, the surface mount components of many electronic products are smaller and smaller, and even some parts have a surface size as small as 0.4 mm×0.2. Mm, which puts higher demands on the precision of the used nozzle nozzle in the production process. The so-called nozzle is a patch tool that joins the surface of the part by negative pressure and moves the part to the specified position. The diameter of the inner hole of the nozzle used in the tiny parts has reached 0.2mm. Because the inner hole is too small, it is easy to block or break during daily use, which causes the suction force to decrease and the parts cannot be sucked up, or the parts are moved. Parts are dropped, or the position of the fitting is deviated, and the quality of the product is greatly reduced.

To detect the nozzle failure, usually use a magnifying glass to enlarge the nozzle mouth and use manual visual inspection to detect whether the nozzle is blocked. The problems caused by such detection methods are:

First, since the visual position is only the mouthpiece of the nozzle, it is impossible to confirm whether other parts of the nozzle hole are blocked or damaged, and the detection is not comprehensive.

Second, it is easy to have a large error by manual visual inspection to determine whether it is faulty. If the eye is tired, the image will be misjudged and the accuracy will not be strong.

Third, the manual detection speed is slow, resulting in inefficiency.

Fourth, manual testing costs are high.

Based on the above problems, the use of existing detection methods can still cause poor placement and affect product quality.

technical problem

The invention provides a method for detecting nozzle clogging and a device thereof, aiming at solving the problems of incomplete detection, low accuracy and high efficiency and low cost in the prior art.

Technical solution

In order to solve the above problems, the present invention provides a method for detecting a nozzle failure, comprising the following steps:

Irradiating light from either end of the nozzle into the inner hole of the nozzle;

And then collecting an image formed by the light passing through the inner hole of the nozzle from the other end of the nozzle;

Whether the nozzle has a fault is determined by analysis of the image.

Further, one end of the nozzle is a suction port, and the other end is a connection port, and the light is irradiated from the inner hole of the nozzle from the suction port of the nozzle;

An image of light passing through the inner hole of the nozzle is then taken from the nozzle connection.

Further, the image is acquired by an imaging device.

Further, the image is transmitted to the image comparison system, and the element is compared with a standard image set in advance in the image comparison system. If the image element matches the element of the standard image, Then, it is determined that the nozzle is not blocked; if the element of the image does not match the element of the standard image, it represents that the nozzle is faulty.

Specifically, the element that the image is compared with the standard image is the shape and/or area of the image.

According to the above method, the image may reflect the condition in the inner hole of the nozzle, and help determine whether the nozzle has a fault such as clogging or cracking, and comprehensively detect the inner hole of the nozzle; In the middle, the diameter of the suction port of most nozzles is smaller than the diameter of the connection port, and the image from the small diameter port entering the large diameter port can be more comprehensive in the reaction inner hole, so in order to achieve better detection purpose. Illuminating the mouth of the nozzle, collecting images from the connection port, and then performing image analysis to determine the nozzle failure; after the image is captured by the imaging device, the image is compared with a preset standard image. , can fully improve the accuracy of manual detection, while improving detection efficiency and reducing costs.

The present invention further provides a device for detecting a nozzle failure, comprising: a detection frame and a light source fixed on the detection frame, wherein one end of the nozzle to be inspected is a suction port, and the other end is a connection port, A nozzle is placed over the light source and a mouthpiece or connection port of the nozzle is aligned with the light source.

Further, an imaging device is disposed above the nozzle.

Further, a computer having an image comparison system is further provided, and the images collected by the imaging device are transmitted to a computer for analysis and comparison with a standard image set in advance in the image comparison system.

Further, the detecting frame is further provided with a first guiding rail, and the imaging device slides on the first guiding rail and passes over the suction nozzle, and is further provided with a first stepping motor and a first transmission belt device, The first stepper motor drives the first drive belt device to operate, the image forming device being coupled to the first drive belt device.

Preferably, a nozzle loading box and a second rail are further disposed, wherein the nozzle loading box is provided with a through hole slot for vertically placing the nozzle, and the second rail is mounted on the detecting frame, the nozzle The loading cassette slides over the second rail and passes over the light source, and at least one nozzle can be loaded into the nozzle loading cassette.

Preferably, a second stepping motor and a second drive belt device are further provided, the second stepping motor driving the second drive belt device to operate, and the nozzle loading cassette is coupled to the second drive belt device.

Beneficial effect

According to the above technical solution, when the device for detecting the nozzle failure is provided, the light emitted by the light source is aligned with the suction port or the connection port of the nozzle, and the image formed at the other end of the nozzle can be faulty. Comprehensively determining, and further, an imaging device is disposed above the nozzle to collect the image, so that the image is stably retained, and it is more convenient to zoom in and out of the analysis; in order to increase the accuracy of the fault detection, an image ratio is added. For the computer of the system, the image captured by the imaging device is transmitted to the computer for analysis and comparison by the image comparison system; further, a nozzle loading box that slides on the track is disposed, and the nozzle is loaded on the nozzle The second stepping motor drives the belt drive to the top of the light source, which greatly improves the detection efficiency.

DRAWINGS

1 is a schematic diagram of a detection process according to an embodiment of the present invention;

Figure 2 is a perspective view of an embodiment of the present invention.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 1 and FIG. 2, an embodiment of the present invention provides a device for detecting a nozzle failure, comprising a detection frame 4 and a light source 1 fixed on the detection frame 4. The end of the nozzle 2 to be inspected is a suction port 21, the other end is a connection port 22, the nozzle 2 is placed above the light source 1 and either end of the nozzle 2 is aligned with the light source 1. When operating, the light source 1 emits light toward the suction Irradiating at either end of the nozzle 2, an image 3 formed by the light source 1 passing through the inner hole of the nozzle 2 is formed from the other end of the nozzle 2, and then the nozzle 2 is judged to be faulty by analyzing the image 3. It can fully detect the fault condition of the inner hole of the nozzle 2.

Further, the imaging device 5 is disposed above the nozzle 2 to facilitate the detailed analysis of the image 3 collected by the imaging device 5, so that the image 3 is stably retained, which is convenient for recording and saving, and for amplifying and analyzing the fault, so that the detection and analysis are not used. Simultaneously, it is easy to divide the work and can improve certain work efficiency.

Further, a computer having an image comparison system is further provided, and the image 3 captured by the imaging device 5 is transmitted to a computer for analysis and comparison with a standard image set in advance in the image comparison system, and the image is captured by The elements: the area, the shape and the elements of the standard image: the area and the shape are compared, and the image 3 which differs from the standard image matching element by a certain value can initially determine the nozzle failure, and use the image comparison in the computer. The system performs analysis and judgment, and it is more accurate than manual visual inspection to determine the fault.

Further, in order to enable more accurate image acquisition by fine-tuning the photographing position of the image forming apparatus, a first guide rail 11 is further disposed on the detecting frame 4, and the image forming apparatus 5 slides on the first rail 11 and passes through the suction. Above the mouth 2, there is also a first stepping motor 10 and a first drive belt device 12, the first stepper motor 10 driving the first drive belt device 12 to operate, the image forming device 5 and the first drive belt device 12 connection.

The embodiment of the present invention further includes a nozzle loading box 6 and a second guide rail 7. The nozzle loading box 6 is provided with a through hole slot 61 for vertically accommodating the nozzle 2, and the second rail 7 is mounted on the On the detecting frame 4, the nozzle loading box 6 slides on the second rail 7 and passes over the light source 1. The nozzle loading box 6 can be loaded with at least one nozzle 2, which is accurately arranged by the above mechanism. The lateral and longitudinal distance between the light source 1 and the nozzle 2 is fixed, which further improves the accuracy and the detection work efficiency.

In order to improve the detection efficiency, a second stepping motor 8 and a second transmission belt device 9 are also provided, and the second stepping motor 8 drives the second transmission belt device 9 to operate, the nozzle loading box 6 and The second drive belt device 9 is connected. During operation, the second stepping motor 8 drives the second drive belt device 9 to transport the nozzle loading cassette 6 above the light source 1 through the second stepping motor 8. The transmission transmits the light to the nozzle 2 on the nozzle loading box 6 one by one, and the nozzle loading box 6 can be provided with a plurality of through holes 61 and loaded with a plurality of nozzles 2, which greatly improves the detection efficiency and reduces Labor has reduced costs and the accuracy of detection has been further improved.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

A method for detecting a nozzle failure, comprising the steps of:

Irradiating light from either end of the nozzle into the inner hole of the nozzle;

And then collecting an image formed by the light passing through the inner hole of the nozzle from the other end of the nozzle;

Whether the nozzle has a fault is determined by analysis of the image.
A method of detecting a nozzle failure according to claim 1, wherein

One end of the nozzle is a suction port, and the other end is a connection port, and the light is irradiated from the inner hole of the nozzle from the suction port of the nozzle;

An image of light passing through the inner hole of the nozzle is then taken from the nozzle connection.
A method of detecting a nozzle failure according to any one of claims 1 or 2, wherein

The image is acquired by an imaging device.
A method of detecting a nozzle failure according to claim 1 or 2, wherein

Transmitting the image into an image comparison system, and performing element comparison with a standard image set in advance in the image comparison system,

If the element of the image matches the element of the standard image, determining that the nozzle is not blocked;

If the element of the image does not match the element of the standard image, it represents that the nozzle is faulty.
A method of detecting a nozzle failure according to claim 4, wherein

The element that the image is compared to the standard image is the shape and/or area of the image.
The device for detecting a nozzle fault is characterized in that it comprises a detecting frame and a light source fixed on the detecting frame, wherein one end of the nozzle to be inspected is a suction port, and the other end is a connection port, and the nozzle is placed in the Above the light source and the mouthpiece or connection port of the nozzle is aligned with the light source.
A device for detecting a nozzle failure according to claim 6, wherein an imaging device is disposed above said nozzle.
A device for detecting a nozzle failure according to claim 7, further comprising a computer having an image comparison system, wherein the image captured by the imaging device is transmitted to a computer and the image comparison system is The set standard images are analyzed and compared.
A device for detecting a nozzle failure according to claim 7 or 8, wherein the detecting frame is further provided with a first guide rail, and the image forming device slides on the first rail and passes through the nozzle Above, a first stepping motor and a first drive belt device are also provided, the first stepping motor driving the first drive belt device to operate, and the image forming device is coupled to the first drive belt device.
A device for detecting a nozzle failure according to any one of claims 6-8, further comprising a nozzle loading box and a second rail, wherein the nozzle loading box is provided with a vertical mounting nozzle a through hole slot, the second rail is mounted on the detecting frame, the nozzle loading box slides on the second rail and passes over the light source, and at least one nozzle can be loaded in the nozzle loading box .
A device for detecting a nozzle failure according to claim 10, further comprising: a second stepping motor and a second transmission belt device, wherein said second stepping motor drives the second transmission belt device to operate, The nozzle loading cassette is coupled to the second drive belt unit.