KR102426948B1 - The PCB module aligner of 3D vision test handler - Google Patents

Abstract

The present invention relates to a PCB module alignment device of a 3D vision test handler that stably clamps a PCB module to align the position of the PCB module, and damage and shadow of the tab in an SSD-type PCB module in which a tap is formed in the clamping area By stably aligning the PCB module while preventing
To this end, in the present invention, a pair of sliders 20 are installed oppositely on the upper portion of the mounting plate 10 , and a flat surface 41 on which the tab 31 of the PCB module 30 is placed on each slider 20 . ) and a finger 40 having a support surface 42 for supporting the PCB module 30 is rotatably installed, and a horizontal reference surface 24 is provided on the slider 20 to the finger 40 In a state where the PCB module 30 to be tested for 3D vision is placed on the seating surface 41, the opposite fingers 40 move inward according to the driving of the actuator so that the tab 31 of the PCB module 30 is exposed to the outside. The support surface 42 is aligned while clamping the PCB module 30 to correct the position of the finger 40 compared to the horizontal reference surface 24 when the vision camera 50 checks the horizontal state of the PCB module 30 . characterized by being

Description

The PCB module aligner of 3D vision test handler

The present invention relates to a PCB module alignment device of a 3D vision test handler that stably clamps a PCB module to align the position of the PCB module, and more specifically, an SSD-type PCB module in which a tap is formed in the clamping part. It relates to a 3D vision test handler's PCB module alignment device that stably aligns the PCB module while preventing the damage of the tab and the occurrence of shadows so that the vision camera can take a 3D image of the attachment state of the parts attached to the board. .

In general, a PCB module (memory module, SSD, etc.) refers to an independent circuit configured by soldering and fixing a plurality of ICs and components to both sides or one side of a PCB (board).

Since these PCB modules have higher added value than selling ICs individually, semiconductor manufacturers are developing them as main products.

Therefore, the PCB module produced through the manufacturing process is an important component, and since the reliability of the product is very important, only products determined as good products through strict quality tests are shipped.

These PCB modules are tested for the attachment state of parts by the vision test handler, and the tested products go through a process of classifying them into good and bad according to the test results.

Here, the vision test handler is a device that takes a surface image of the PCB module with a camera and compares the image with an image in a normal state to determine whether there is a defect.

In other words, the PCB module tested by the vision test handler is expensive, so the reliability of the product is also very important. Only products judged as good products through strict quality tests are shipped, and the PCB modules judged to be defective are modified or completely discarded. will do

Conventionally, a picker holds a PCB module contained in a tray to load the PCB module in a horizontal state in a carrier with an open bottom.

Therefore, the upper surface of the PCB module loaded in the horizontal state on the carrier is exposed to the upper side, and the lower surface is exposed to the lower side because the lower part of the carrier is open.

In this way, when the PCB module loaded on the carrier is transferred to the vision unit with the upper and lower portions exposed, vision cameras are installed on the upper and lower portions of the vision unit. The test is conducted by photographing the exterior in a flat (2D) plane.

After the vision test of the PCB module is completed through the process as described above, the unloading picker picks the PCB module loaded in the carrier, selects a good product or a defective product according to the inspection result, and unloads it into the unloading tray.

(Prior art literature)

(Patent Document 0001) Republic of Korea Patent Publication No. 10-1012633 (Registered on Jan. 27, 2011)

(Patent Document 0002) Republic of Korea Patent Publication No. 10-1076741 (Registered on October 19, 2011)

(Patent Document 0003) Republic of Korea Patent Publication No. 10-0724150 (Registered on May 25, 2007)

(Patent Document 0004) Republic of Korea Patent Publication No. 10-2019-0036588 (published on April 5, 2019)

However, the conventional PCB module vision test handler has several problems as follows.

First, while moving the PCB module to be tested in a carrier, taking a 2D image of the attachment state of the parts, and then manually turning the PCB module 180°, the utilization rate of expensive equipment will drop.

Second, there is a limit to perfectly maintaining the horizontal state of the PCB module contained in the carrier due to the processing tolerance of the carrier and particles. Because it is filmed as a 2D image, it makes the mistake of judging a good product as a defective product.

Third, since the PCB module is placed in the carrier in a horizontal state and the vision test of the PCB module is performed while the carrier is moving, various types of carriers have to be provided whenever the length of the PCB module is different.

The present invention has been devised to solve the conventional problem, and the purpose of the present invention is to enable vision testing by horizontally aligning the tabs of the SSD-type PCB module in which the tabs are formed in the clamping part in a state in which the tabs are not damaged. .

Another object of the present invention is to improve the structure of the finger so that a shadow is not generated in a portion where a PCB module is clamped.

According to the aspect of the present invention for achieving the above object, a pair of sliders are installed oppositely on the upper part of the mounting plate, and each slider has a flat surface on which the tab of the PCB module is placed and a support surface for supporting the PCB module. Each of the fingers is rotatably installed and a horizontal reference plane is provided on the slider, and in the state where the PCB module to be tested for 3D vision is placed on the seat surface of the finger, the opposite fingers move inward according to the operation of the actuator, PCB module of 3D vision test handler, characterized in that the support surface is aligned while clamping the PCB module so that the tab is exposed to the outside, and the position of the finger is corrected compared to the horizontal reference plane when the vision camera checks the horizontal state of the PCB module An alignment device is provided.

The present invention has the following advantages over the prior art.

First, the image of the attachment state of the part with a vision camera in a state where the part is not covered by the finger or the shadow is not generated as the finger cut in the shape of "B" so that the tab of the SSD type PCB module is exposed to the outside clamps the PCB module It is possible to accurately test whether the parts attached close to the tab are defective as they are tested for defects by shooting them as 3D images.

Second, when the vision camera judges whether the attachment state of the parts attached to the PCB module is defective, use the horizontal reference plane formed on the slider to check whether the PCB module clamped to the finger is in a horizontal state, and then, if it is not in the horizontal state, the By correcting the position, the reliability according to the vision test of the PCB module is improved.

Third, a pair of sliders installed on the mounting plate are screwed to a ball screw that rotates according to the driving of the motor, so even if the length of the PCB module to be vision tested is different, the distance between the sliders can be quickly adjusted to enable vision testing. do.

Fourth, since the finger on one side is movably installed by the elastic member, it is possible to prevent damage to the PCB module in advance when clamping the PCB module with a pair of fingers.

1 is a plan view showing a general SSD type PCB module;
2 is a perspective view showing a 3D vision handler to which the present invention is applied;
3 is a perspective view showing the main part of the present invention;
4 is an exploded perspective view of a variable finger applied to the present invention;
5 is a longitudinal cross-sectional view of the coupled state of FIG.
6 is a state diagram in which an SSD-type PCB module is clamped by a pair of fingers.
7 is a state diagram in which the vision camera captures the SSD-type PCB module clamped to the finger.
8 is a schematic view showing different forms of seating surface lengths of oppositely positioned fingers

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in several different forms and is not limited to the embodiments described herein. It is noted that the drawings are schematic and not drawn to scale. Relative dimensions and proportions of parts in the drawings are shown exaggerated or reduced in size for clarity and convenience in the drawings, and any dimensions are illustrative only and not limiting. And the same reference numerals are used to denote like features for the same structure, element, or part appearing in two or more drawings.

2 is a perspective view showing a 3D vision handler to which the present invention is applied, FIG. 3 is a perspective view showing the main part of the present invention, and FIG. 4 is an exploded perspective view of a variable finger applied to the present invention. A pair of sliders 20 are installed to face each other, and each slider 20 has a flat surface 41 on which the tab 31 of the PCB module 30 is placed and a support surface for supporting the PCB module 30 ( 42), each of the fingers 40 cut in the shape of "B" is rotatably installed.

The reason why the finger 40 is cut in a “L” shape to have a flat surface 41 on which the tab 31 of the PCB module 30 is placed and a support surface 42 for supporting the PCB module 30 is shown in Fig. As shown in 7, when the vision camera 50 installed inclined at a 60° angle or installed vertically to photograph the attachment state of the component attached to the SSD-type PCB module 30, the thickness of the finger 40 is affected This is to prevent in advance a phenomenon in which a shadow is formed by receiving a light, the inspection area is covered, or the tab 31 of the PCB module 30 is damaged.

Therefore, as the actuator is driven in a state where the PCB module 30 to be tested for 3D vision is placed on the seating surface 41 of the finger 40, the opposite fingers 40 move inward at the same time to the tab of the PCB module 30. The support surface 42 is aligned while clamping the PCB module 30 so that the 31 is exposed to the outside.

At this time, as shown in FIG. 8 , the length L2 of the support surface 41 on which the tab 31 of the PCB module 30 is not formed is the length L2 of the support surface 41 on which the tab 31 is placed. It is formed shorter than the length L1.

This is to mount as many components as possible up to the edge of the PCB as more components are mounted on the same area of the PCB due to the high integration of the PCB module 30 .

Although the actuator is shown as a single-acting cylinder 21 in FIG. 6 showing an embodiment of the present invention, a pair of fingers 40 are moved forward and backward using two motors 22 to be described later without installing a single-acting cylinder. It is understandable that the PCB module 30 may be handled.

In FIG. 3 shown as an embodiment of the present invention, a plurality of fingers 40 are disposed on the slider 20 to increase the test efficiency of the 3D vision test handler, which is expensive equipment, but the number is determined to be an appropriate number according to need. Therefore, there is no need to specifically limit this.

As shown in FIGS. 4 and 5 , a finger 40 on one side of a pair of fingers 40 installed opposite to the slider 20 is elastically installed to be movable with an elastic member 43 such as a coil spring. has been

This is when a pair of fingers 40 move inward to each other and clamp the PCB module 30 in a state in which the PCB module 30 to be tested for 3D vision is placed on the seating surface 41 of the finger 40 . This is to prevent damage to the PCB module 30 by absorbing the shock applied by the fingers 40 elastically installed with the member 43 .

A pair of sliders 20 installed opposite to the mounting plate 10 are screw-coupled to a ball screw 23 rotated by a motor 22, respectively, so that the length of the PCB module 30 to be tested for 3D vision is The spacing of the slider 20 is adjusted accordingly.

Therefore, when performing a 3D vision test of a PCB module 30 having a predetermined length and a 3D vision test of a PCB module having a different length, two motors 22 are driven at the same time to adjust the spacing of the slider 20. Thus, the 3D vision test of the PCB module 30 becomes possible.

However, if the single-acting cylinder 21 is not installed as an actuator, it is understandable that the two motors 22 are driven at the same time to move the pair of fingers 40 forward and backward while handling the PCB module 30 to be tested. will be.

In addition, the slider 20 is provided with a horizontal reference plane 24 so that when the vision camera 50 checks the horizontal state of the PCB module 30 , the finger 40 is moved to a horizontal state compared to the horizontal reference plane 24 . is to be corrected.

At this time, if the horizontal reference plane 24 is formed on the slider 20 to be positioned on the same line with the seating surface 41 of the PCB module 30 as shown in FIG. 3 , the vision camera 50 is a component of the PCB module 30 . When photographing the attachment state, it is more preferable because the horizontal state of the PCB module 30 placed on the seating surface 41 of the finger 40 can be compared and determined at the same time with the horizontal reference surface 24 .

The finger 40 is rotatably installed at one end of the shaft 44 as shown in FIG. 5, a pulley 45 is fixed to the other end of the shaft 44, and another actuator ( It is wound with a driving pulley 62 and a timing belt 63 installed on a ball spline 61 that rotates according to the driving of the 60 .

The operation of the present invention will be described as follows.

First, if the motor 22 is driven according to the length of the PCB module 30 to be tested for 3D vision, the ball screw 23 screwed to the slider 20 rotates. According to the length of the PCB module 30, it is possible to adjust the interval at an appropriate interval.

At this time, since the PCB module 30 to be 3D vision test is not loaded on the seating surface 41 of the finger 40, compressed air is supplied to the single-acting cylinder 21, so that a pair of fingers 40 are opened to both sides. Therefore, the elastic member 43 installed on the finger 40 on one side maintains the tensioned state.

In this state, a picker (not shown) vacuum-sucks the PCB module 30 contained in a loading buffer or tray, and puts it on the seating surface 41 of the finger 40 and puts it on the PCB. After releasing the adsorption state of the module 30, the picker moves to the initial position and waits.

As described above, after the picker places the PCB module 30 to be tested for 3D vision on the seating surface 41 of the finger 40, the single-acting cylinder 21 as an actuator drives the seating surface 41 of the finger 40. After adjusting the seating state of the PCB module 30 placed on the seating surface 41 by spreading a pair of fingers 40 apart within the range in which the PCB module 30 placed on the board does not separate, the single-acting cylinder 21 is Since the re-driving moves the fingers 40 spread out on both sides inward, the side of the PCB module 30 is clamped by the support surface 42 of the finger 40, at this time the finger 40 on one side is a coil spring. Since it is elastically installed with an elastic member 43 such as to absorb the shock applied to the PCB module 30 , damage to the PCB module 30 is prevented.

However, if the PCB module 30 to be tested for 3D vision is vertically loaded on the tray, a pair of fingers 40 are rotated 90° while waiting, and then the picker grips the PCB module 30 on the tray. After positioning between the fingers 40, the single-acting cylinder 21, which is an actuator, is driven to clamp the side surface of the PCB module 30 with the support surface 42 of the fingers 40, and then the seating surface of the fingers 40 The finger 40 is rotated 90° so that (41) faces upward.

After that, when a pair of fingers 40 are spread apart within a range in which the PCB module 30 supported on the support surface 42 of the finger 40 does not separate, the PCB module 30 is mounted on the seating surface 41 by its own weight. ), the side of the PCB module 30 is the support surface of the finger 40 ( 42), and at this time, the finger 40 on one side is elastically installed with an elastic member 43 such as a coil spring to absorb the shock applied to the PCB module 30, so the PCB module 30 is damaged. This will prevent the phenomenon of being applied.

The operation of placing the PCB module 30 on the seating surface 41 of the finger 40 in a horizontal state and then clamping it by the support surface 42 may be performed by driving the motor 22 instead of the single-acting cylinder 21 . have.

With the above operation, a pair of fingers 40 move inward and clamp the PCB module 30 to be tested for 3D vision as shown in FIG. When the vision camera 50 or vertical camera (not shown) installed inclined at an angle of 60° takes pictures of the attachment state of the parts attached to the SSD-type PCB module 30, the thickness of the finger 40 is affected. It is possible to prevent in advance a phenomenon in which a shadow is formed and the inspection area is obscured or the tab 31 of the PCB module 30 is damaged.

When the vision camera 50 takes a picture of the attachment state of the component attached to the PCB module 30, it is checked whether the PCB module 30 clamped to the finger 40 maintains the horizontal state from time to time or whenever necessary. Since it is corrected compared to the provided horizontal reference plane 24, it has the advantage of improving test reliability.

After the 3D vision test of the PCB module 30 clamped to the pair of fingers 40 is performed by the operation as described above, the picker vacuum-sucks the PCB module 30 and sorts it into good and bad products according to the test results. As a new PCB module to be tested is loaded at the same time as unloading, 3D vision test of the PCB module can be continuously performed.

At this time, it is understandable that the PCB module 30 that has been tested can be unloaded in a horizontal or vertical state according to the shape of the groove formed in the tray.

On the other hand, when a 3D vision test of a PCB module 30 having a predetermined length is performed and a 3D vision test of a PCB module having a different length is performed, a motor for rotating the ball screw 23 screwed to each slider 20 By driving 22 to adjust the interval of the slider 20, it is possible to improve the operation rate of expensive equipment.

Although embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains will understand that it may be implemented in other specific forms without changing the technical spirit or essential features. will be.

Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention described in the above detailed description is indicated by the following claims, meaning and All changes or modifications derived from the scope and its equivalents should be construed as being included in the scope of the present invention.

10: mounting plate 20: slider
22: motor 24: horizontal reference plane
30: PCB module 31: tab
40: finger 41: seating surface
42: support surface 43: elastic member
50: vision camera

Claims (7)

A pair of sliders 20 are installed opposite to each other on the upper portion of the mounting plate 10 , and a flat surface 41 and a PCB module 30 on which the tab 31 of the PCB module 30 is placed on each slider 20 . ) is rotatably installed with each of the fingers 40 having a support surface 42 supporting the In the state where the PCB module 30 to be tested for 3D vision is placed, the opposite fingers 40 move inward according to the driving of the actuator so that the tab 31 of the PCB module 30 is exposed to the outside. 3D characterized in that the position of the finger 40 is corrected compared to the horizontal reference plane 24 when the vision camera 50 checks the horizontal state of the PCB module 30 by aligning the PCB module 30 while clamping it. PCB module alignment device of Vision Test Handler.

The method according to claim 1,
The 3D vision test handler's PCB module alignment device, characterized in that the one side of the finger (40) is movably elastically installed with the elastic member (43).
The method according to claim 1,
The slider 20 installed opposite to the mounting plate 10 is screwed to the ball screw 23 rotated by the motor 22, and the spacing of the slider 20 according to the length of the PCB module 30 to be tested. PCB module alignment device of the 3D vision test handler, characterized in that to adjust the.
delete The method according to claim 1,
The horizontal reference plane 24 is formed on the slider 20 to be positioned on the same line with the seating surface 41 of the PCB module 30 so that the vision camera 50 displays the horizontal state of the PCB module 30 on the horizontal reference plane 24 ) and a 3D vision test handler's PCB module alignment device, characterized in that it is compared and judged at the same time.
The method according to claim 1,
3D vision test handler PCB module alignment device, characterized in that the actuator is a motor (22) or a single-acting cylinder (21).
The method according to claim 1,
The length L2 of the support surface 41 on which the tab 31 is not formed of the PCB module 30 is placed is shorter than the length L1 of the support surface 41 on which the tab 31 is placed. 3D vision test handler's PCB module alignment device, characterized in that.

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