CN104890372B

CN104890372B - The useless plate marking devices of PCB and its marking method

Info

Publication number: CN104890372B
Application number: CN201510287922.XA
Authority: CN
Inventors: 顾宗伟; 宋宝忠; 潘茂峰
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2015-05-29
Filing date: 2015-05-29
Publication date: 2017-03-29
Anticipated expiration: 2035-05-29
Also published as: CN104890372A

Abstract

The present invention provides a kind of useless plate marking device of PCB and its marking method, and device therein includes the second slideway and mark unit that main body, the first slideway being arranged in main body and the first slideway be arranged in parallel；Wherein, mutual corresponding first conveyer belt and the second conveyer belt are respectively arranged with the inside of the first slideway and the second slideway；PCB passes through the first conveyer belt and the second conveyer belt is moved on the first slideway and the second slideway；Mark unit is fixed in main body, and mark unit is located at the top of the first slideway and the second slideway, and corresponding with the position of PCB；Mark unit is for being marked to the defective products in PCB.Labor intensity, improve production efficiency can be reduced, unnecessary loss is reduced using foregoing invention.

Description

PCB waste board marking device and marking method thereof

Technical Field

The invention relates to the technical field of PCB manufacturing, in particular to a PCB waste board marking device and a marking method thereof.

Background

The PCB manufacturing industry needs to carry out qualified inspection and labeling before the PCB leaves a factory, and the PCB which is not qualified needs to be marked and distinguished on the surface of the PCB so as to be identified in the labeling process.

In the process of labeling the PCB, only the qualified product pieces need to be labeled, once labeling is carried out on the defective product, not only label elements are wasted, but also the defective product and the good product are confused, and under the condition that the appearance of the defective product is not easy to detect, the defective product flows out and continues to the finished product, so that the possibility of defective finished products is caused.

At present, marking defective products in a plurality of PCB units on a complete circuit board mainly comprises: the defective marking is performed on both the front and back sides of the defective PCB unit under inspection, and is generally performed by using a pen to cut or blacken (including both solid and partial blacking) the defective unit, as shown in the PCB defective marking of fig. 1, wherein the solid blackened PCB1 unit is the defective PCB unit in the circuit board 2.

It can be known that the poor PCB marking in the existing circuit board has the following defects:

1. manpower and material resources are consumed, and the manufacturing cost is high;

2. because the reverse side and the front side of the defective product are marked, after the front side is marked, the whole plate needs to be turned over, and the possibility of wrong labeling and label leakage on the back side exists;

3. because the production and the inspection of product are respectively at different manufacturing procedure, the difficult statistics of data of inspection, when examining out a large amount of defective products, can not in time feed back to the place ahead production line, cause the continuous production and the drainage of defective products, and then cause unnecessary loss.

Disclosure of Invention

In view of the above problems, the present invention provides a marking device for a PCB and a marking method thereof, so as to solve the problems of low marking efficiency, high cost, poor quality, etc. of the existing PCB.

According to an aspect of the present invention, there is provided a marking apparatus for a PCB waste, comprising: the marking device comprises a main body, a first slide way arranged on the main body, a second slide way arranged in parallel with the first slide way and a marking unit; wherein, a first conveyor belt and a second conveyor belt are respectively arranged at the inner sides of the first slideway and the second slideway; the PCB moves on the first slideway and the second slideway through the first conveyor belt and the second conveyor belt; the marking unit is fixed on the main body, is positioned above the first slideway and the second slideway which correspond to each other and corresponds to the position of the PCB; the marking unit is used for marking defective products in the PCB.

According to another aspect of the present invention, there is provided a marking method for a waste PCB, including: conveying the PCB above the supporting plate through a first conveying belt and a second conveying belt; fixing the PCB on the support plate and lifting the PCB under the action of the support plate; and marking the bad PCB by the marking unit.

By utilizing the PCB waste board marking device and the marking method thereof, the condition of mistaken marking or missing marking can be avoided, the labor intensity is reduced, the marking efficiency is improved, the continuous production of defective products is controlled, and unnecessary loss is reduced.

To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.

Drawings

Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings. In the drawings:

FIG. 1 is a schematic diagram of a conventional PCB defect marking;

fig. 2 is a schematic overall structure diagram of a PCB waste marking device according to an embodiment of the present invention;

fig. 3 is a schematic partial structure diagram of a PCB waste marking device according to an embodiment of the present invention;

FIG. 4 is a schematic view of a support plate according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a marking unit according to an embodiment of the present invention;

fig. 6 is a flowchart of a marking method for a waste PCB according to an embodiment of the present invention.

Wherein the reference numerals include: the device comprises a PCB01, a circuit board 02, a main body 1, a first slide way 2, a first conveyor belt 21, a second slide way 3, a second conveyor belt 31, a first lead screw 41, a first lead screw 42, a second lead screw 43, a marking unit 5, a PCB6, a first fixing plate 71, a first fixing plate 72, a first fixing plate 73, a first fixing plate 74, a first driving device 81, a first driving device 82, a first driving device 83, a first driving device 84, a second driving device 85, a second driving device 86, a first slider 91, a first slider 92, a second slider 93, an alarm device 10, a visual device 11, a second fixing plate 12, a guide rail 13, a second fixing plate 14, a slider 15, a third driving device 16, a push plate 17, a marking head 18, a support plate 19, an air suction opening 191, a sensor 192, a limit column, a camera 20, a fourth driving device 21 and a push plate 22.

The same reference numbers in all figures indicate similar or corresponding features or functions.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

In the process of describing the specific embodiment of the present invention, the PCB mainly refers to an entire PCB, that is, a typeset PCB, and the marking process is performed on the entire PCB, and mainly refers to marking individual PCB single products (bad PCBs or waste boards) on the entire PCB, and is not specifically distinguished in the following description process.

Aiming at the problems that the marking of the PCB waste plate consumes manpower and material resources, the manufacturing cost is high, the possibility of label error and label leakage exists, the continuous production of defective products is caused, and the like at present, the whole PCB is conveyed to the lower part of the marking unit through the slide ways (comprising the first slide way and the second slide way), the position of the marking head is adjusted through the first direction transmission device and the second direction transmission device, the single defective PCB is marked under the action of the control system, the precision is high, the speed is high, the cost is low, the defective data can be analyzed according to the analysis system (comprising the influence analysis system and the data analysis system) and fed back to the front-end production, the continuous production of the defective products is avoided, and the enterprise loss is reduced.

In order to describe the marking device and the marking method for the waste PCB provided by the present invention in detail, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 2 shows an overall structure of a PCB waste marking apparatus according to an embodiment of the present invention; fig. 3 illustrates a partial structure of a PCB waste marking apparatus according to an embodiment of the present invention; FIG. 4 illustrates a support plate structure according to an embodiment of the present invention; and, fig. 5 shows a marking unit structure according to an embodiment of the present invention.

As shown in fig. 2 to 5, the marking device for the waste PCB provided by the present invention includes a main body 1, a first slide 2 disposed on the main body 1, a second slide 3 disposed in parallel with the first slide 2, and a marking unit 5; wherein, a first conveyor belt 21 and a second conveyor belt 31 are respectively arranged at the corresponding inner sides of the first slide way 2 and the second slide way 3; the PCB imposition is moved on the first and second skids 2, 3 by the action of the first and second conveyor belts 21, 31.

The marking unit 5 is fixed on the main body 1, the marking unit 5 is positioned above the first slide way 2 and the second slide way 3, and the marking head 18 of the marking unit 5 corresponds to the position of the PCB6 by adjusting the position of the marking unit; finally, the defective products in the PCB6 are marked by the marking unit 5.

It should be noted that the shape of the marking head 18 can be changed according to different PCB specifications, the marking mode can be ink jet, labeling, indentation, punching or cutting, for example, when the marking is performed in an ink jet mode, black or other color ink is arranged inside the marking head, and an ink feeding pipe is connected to replenish the ink, and the specific marking mode can be adjusted according to production needs.

The specific structure of the marking unit 5 and its positional relationship with the first and second skids 2 and 3 and the main body 1 will be described in detail below.

Specifically, the marking unit 5 includes a first direction transmission device and a second direction transmission device; wherein, first direction transmission includes: first driving devices (81, 82, 83, 84) fixedly connected with the main body 1 through first fixing plates (71, 72, 73, 74), first lead screws (41, 42) positioned between the first driving devices (81, 82, 83, 84), and first sliding blocks (91, 92) positioned on the first lead screws (41, 42); a second direction transmission device is provided on the first slider (91, 92), the second direction transmission device including: second driving devices (85, 86) fixedly connected with the first sliding blocks (91, 92) through second fixing plates (12, 14) and the guide rail 13, a second lead screw 43 positioned between the second driving devices (85, 86), a sliding block 15 positioned on the guide rail 13, and a second sliding block 93 positioned on the second lead screw 43, wherein the second sliding block 93 is fixedly connected with the sliding block 15; a third driving device 16 is provided on the slide block 15, a marking head 18 is provided on the third driving device 16, and the third driving device 16 is used for controlling the marking head 18 to move up and down.

The first sliding blocks (91 and 92) move along the first lead screws (41 and 42) under the action of first driving devices (81, 82, 83 and 84) to drive the second-direction transmission device to move on the first-direction transmission device, the second sliding block 93 moves along the second lead screw 43 under the action of second driving devices (85 and 86), and the marking head 18 is driven to move through the movement of the first sliding blocks (91 and 92) and the second sliding block 93 to mark the defective PCB 6; the transmission direction of the first direction transmission device (namely, the movement direction of the first slide block) is perpendicular to the transmission direction of the second direction transmission device (namely, the movement direction of the second slide block), so that the marking unit 5 can perform position adjustment in the two directions of the X axis and the Y axis of the horizontal plane, and mark the defective PCB6 under the action of the sensor and the control system.

During the description of the above reference numerals, the first driving device 81 is fixedly connected with the main body 1 through the first fixing plate 71, and the first driving device 82 is fixedly connected with the main body 1 through the first fixing plate 72; the first slider 91 is moved along the first lead screw 41 by the cooperation of the first driving device 81 and the first driving device 82, the first slider 92 is moved along the first lead screw 42 by the cooperation of the first driving device 83 and the first driving device 84, and so on.

In addition, in the process of marking the PCB, in order to conveniently support and fix the PCB, the marking unit 5 further comprises a supporting plate 19; the supporting plate 19 is positioned below the first slideway 2 and the second slideway 3 and is fixed on the main body 1 through a fourth driving device 21, and an air suction port 191, a sensor 192 and a limit column 193 are arranged on the supporting plate 19; the PCB6 is transferred above the supporting plate 19 by the first and second conveyor belts 21 and 31 and fixed by the stopper posts 193; the control system controls the fourth driving device 21 to ascend and the air suction port 191 to suck air according to the signal fed back by the sensor 193, so that the PCB6 is separated from the first conveyor belt 21 and the second conveyor belt 31, the PCB6 is fixedly adsorbed on the supporting plate 19, and the defective PCB is marked under the action of the marking head 18.

It should be noted that the moving mechanisms (e.g., the lead screw and the slider) of the first direction transmission device and the second direction transmission device may be replaced by a form of a conveyor belt, a chain, or a rack.

In one embodiment of the present invention, the first direction transmission device of the marking unit 5 includes four first driving devices (81, 82, 83, 84) respectively fixed to the main body 1 in a rectangular structure by four corresponding first fixing plates (71, 72, 73, 74), wherein a first lead screw 41 is disposed between the first driving device 81 and the first driving device 82, and a first slider 91 is disposed on the first lead screw 41; corresponding to the first lead screw 41, a first lead screw 42 parallel to the first lead screw 41 is provided between the first driving device 83 and the first driving device 84, a first slider 92 is provided on the first lead screw 42, and the first sliders 91 and 92 can move on the first lead screws 41 and 42 respectively by driving of the first driving devices 81, 82, 83, and 84, thereby realizing position adjustment of the marking unit 5 in the first direction.

The second direction drive of the marking unit 5 is arranged on the first direction drive. Specifically, a second fixing plate 12 and a second fixing plate 14 are respectively arranged on the first slider 91 and the first slider 92, the second driving device 85 and the second driving device 86 are respectively fixedly connected with the second fixing plate 12 and the second fixing plate 14, a second lead screw 43 is arranged between the second driving device 85 and the second driving device 86, a second slider 93 is arranged on the second lead screw 43, and the second slider 93 can move along the second lead screw 43 under the action of the second driving device (85, 86) to adjust the marking head 18 position of the marking unit 5 in the second direction.

A guide rail 13 parallel to the second lead screw 43 is fixed to the second fixed plate 12 and the second fixed plate 14, a slide block 15 fixedly connected to the second slide block 93 is engaged with the guide rail 13, the slide block 15 is connected to a slide of the guide rail 13 so that the slide block 15 can slide on the guide rail 13, a third driving device 16 is provided to the slide block 15, and a marking head 18 is provided to the third driving device 16. The specific position of the marking head 18 is adjusted by the first direction transmission device and the second direction transmission device, and when the position corresponds to the bad position of the PCB6, the marking head 18 is driven by the third driving device 16 to move up and down to mark the bad product.

In other words, the fourth driving device 21 is fixedly installed on the main body 1, the supporting plate 19 is installed on the pushing plate 22 of the fourth driving device 21, the air suction hole 191 for tightly sucking the PCB6, the sensor 192 and the limiting post 193 are installed on the supporting plate 19, when the PCB is transmitted to the upper side of the supporting plate 19 through the first conveyor belt 21 and the second conveyor belt 31, the PCB is clamped by the limiting post 193, and at this time, the sensor 192 senses that the PCB is in contact with the limiting post 193, and sends a sensing signal to the control system; the control system controls the push plate 22 of the fourth driving device 21 to ascend and suck air through the air suction port according to the signal fed back by the sensor 192, so that the PCB is separated from the first conveyor belt 21 and the second conveyor belt 31 and is fixedly adsorbed on the supporting plate 19, and then the marking head 18 is controlled to contact with the PCB6 and mark defective products under the combined action of the first direction transmission device and the second direction transmission device.

Specifically, the control system in the embodiment of the present invention is configured to control operations of the first driving means (81, 82, 83, 84), the second driving means (85, 86), the third driving means 16, and the fourth driving means 21, and to acquire a line pitch and a column pitch of the PCB layout and set an ID code of each PCB. Before marking the PCB, the PCB typesetting drawing is input into a computer in advance, the specific line spacing and the specific column spacing of the PCB typesetting are analyzed by the computer, and corresponding ID codes are set for each PCB unit on the whole PCB, so that a data analysis system can perform failure analysis and output failure distribution.

In a preferred embodiment of the present invention, a detection device (camera 20) is disposed on the marking head 18 for identifying the fool-proof mark points on each PCB unit, and transmitting the real-time image of the entire PCB to the control system for analyzing the bad points.

In addition, in order to further strengthen the efficiency of marking of PCB, reduce bad mark or leak mark, the useless board of PCB beats mark device and can also include:

the visual device 11 is used for observing the PCB full page in real time and manually marking the PCB waste board; for example, the visual device 11 may be a touch screen, and can determine whether the PCB unit is qualified or not manually from a real-time state of the touch screen, so as to mark in a manual mode, and when a finger touches a poor PCB image on the touch evaluation display image, the marking unit 5 can perform marking operation on the poor PCB.

The influence analysis system (shown in the figure) is used for controlling the control system to mark the PCB waste plate according to the comparison result of the detection data acquired by the detection device and the standard sample data and recording the ID of the bad PCB; in other words, before marking the PCB, a standard sample of a qualified PCB product is shot by a detection device (a camera) and stored in a system in advance, the standard sample is compared with a real-time image shot by the camera, the error range and the color difference range are exceeded, a judgment result is NG, a signal is sent to a control system to mark, the ID of a bad PCB is recorded, the standard sample is judged to be OK within the error allowable range, and the analysis and judgment of the next PCB are carried out after the marking operation of the unqualified PCB is finished.

A data analysis system (not shown in the figure) for analyzing the defective distribution of the PCB full page according to the ID frequency of the defective PCB obtained by the influence analysis system; the method comprises the steps of analyzing the defective distribution condition of the whole PCB of a certain batch according to the ID frequency of the defective PCBs summarized by the influence analysis system, alarming and feeding the defective result back to the front-end process through the alarm system after the continuous defects exceed the limit value, and even stopping production operation, so that the continuous production and circulation of the defective products are effectively controlled, and the loss is reduced.

The alarm device 10 is used for alarming and feeding back a bad result to the front-end process when the bad distribution acquired by the data analysis system exceeds a preset value, for example, the analysis system can display the analysis of the bad type by forming a chart, the chart is fed back to the front-end production process, and a display screen is arranged on the process so as to display and update the bad data chart at any time; when the reject ratio exceeds the limit value or the continuous reject quantity exceeds the limit value, the alarm device 10 gives an alarm (such as an alarm indicator lamp or intelligent voice prompt), so that a worker analyzes the cause of the reject and takes measures.

In the PCB waste marking device provided by the present invention, the first driving device (81, 82, 83, 84), the second driving device (85, 86), the third driving device 16 and the fourth driving device 21 may be electric cylinders and/or air cylinders.

According to the PCB waste board marking device provided by the invention, the PCB6 moves on the first slide way 2 and the second slide way 3 through the first conveyor belt 21 and the second conveyor belt 31, and the position of the marking head 18 is adjusted through the first direction transmission device and the second direction transmission device, so that the PCB6 can mark the defective PCB6 through the marking head 18 under the action of the supporting plate 19, further, the PCB defect analysis is carried out through the analysis system, and the front-end process is controlled through the analysis result.

Corresponding to the device, the invention also provides a PCB marking method, which utilizes the PCB waste plate marking device to mark bad PCBs in the whole PCB, and comprises the following steps:

s610: the PCB is conveyed above the support plate by the first conveyor belt and the second conveyor belt.

The first conveyor belt and the second conveyor belt are respectively arranged on the inner sides of the first slide way and the second slide way, and the PCB full page can move on the first slide way and the second slide way through the first conveyor belt and the second conveyor belt, so that the PCB can be conveyed.

S620: the PCB is fixed on the supporting plate and ascends under the action of the supporting plate.

After the PCB is conveyed to the upper portion of the supporting plate, the PCB is adsorbed on the supporting plate through the limiting columns and the air suction holes in the supporting plate, and the PCB is lifted up and separated from the conveying belt (comprising the first conveying belt and the second conveying belt) through the fourth driving device located below the supporting plate.

And S630, marking the bad PCB through the marking unit.

Wherein, after PCB is fixed, through first direction transmission and the square transmission of second of adjustment marking unit, make and mark the head and be located PCB's top to detect bad PCB's position through detection device and sensor etc. and mark through third drive arrangement to bad PCB.

For the embodiment of the PCB marking method provided by the present invention, since it is basically similar to the embodiment of the PCB waste board marking device, the relevant points refer to the description of the embodiment of the device, and are not repeated herein.

The marking device and the marking method for the PCB waste plate provided by the invention have the following advantages:

1. through automatic marking, labor intensity is reduced, and production efficiency is improved.

2. Through system control detection and marking, can effectively avoid the mistake to beat and miss to beat:

3. the method can analyze the bad data in time, show the bad results in the form of data or graphs, and give countermeasures in time so as to control the continuous production of the defective products and reduce the loss.

The marking apparatus for PCB waste and the marking method thereof according to the present invention are described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications can be made to the PCB waste marking device and the marking method thereof without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.

Claims

1. A PCB waste board marking device comprises: the marking device comprises a main body, a first slide way arranged on the main body, a second slide way arranged in parallel with the first slide way and a marking unit; wherein,

a first conveyor belt and a second conveyor belt which correspond to each other are respectively arranged on the inner sides of the first slide way and the second slide way;

the PCB moves on the first slide way and the second slide way through the first conveyor belt and the second conveyor belt;

the marking unit is fixed on the main body, is positioned above the first slide way and the second slide way and corresponds to the position of the PCB;

the marking unit is used for marking defective products in the PCB; wherein,

the marking unit comprises a first direction transmission device and a second direction transmission device;

the first direction transmission device comprises: the first driving device is fixedly connected with the main body through a first fixing plate, a first lead screw is positioned between the first driving devices, and a first sliding block is positioned on the first lead screw;

the second direction transmission device is disposed on the first slider, and the second direction transmission device includes: the second driving device and the guide rail are fixedly connected with the first sliding block through a second fixing plate, a second lead screw is positioned between the second driving devices, a sliding block is positioned on the guide rail, and a second sliding block is positioned on the second lead screw and is fixedly connected with the sliding block; a third driving device is arranged on the sliding block, a marking head is arranged on the third driving device, and the third driving device is used for controlling the movement of the marking head;

the first sliding block moves along the first lead screw under the action of the first driving device to drive the second direction transmission device to move on the first direction transmission device, and the second sliding block moves along the second lead screw under the action of the second driving device to drive the marking head to move and mark a bad PCB under the action of a third driving device.

2. The PCB waste marking device as claimed in claim 1, wherein the marking unit further comprises a control system; wherein,

and the control system is used for controlling the first driving device, the second driving device and the third driving device, acquiring the line spacing and the column spacing of the PCB typesetting, and setting the ID codes of all PCBs.

3. The PCB waste marking device as claimed in claim 2, wherein the marking unit further includes a support plate; wherein,

the supporting plate is positioned below the first slide way and the second slide way and is fixed on the main body through a fourth driving device, and an air suction port, a sensor and a limiting column are arranged on the supporting plate;

the PCB is transmitted to the upper part of the supporting plate through the first conveyor belt and the second conveyor belt and is fixed through the limiting columns;

and the control system controls the fourth driving device to ascend and the air suction port to suck air according to a signal fed back by the sensor, so that the PCB is separated from the first conveying belt and the second conveying belt, and the PCB is fixed on the supporting plate in an adsorption manner.

4. The PCB scrap marking apparatus of claim 3, wherein,

the transmission directions of the first direction transmission device and the second direction transmission device are mutually vertical.

5. The PCB scrap marking apparatus of claim 4, wherein,

the marking head is provided with a detection device, and the detection device is used for identifying foolproof identification points on the PCB and transmitting real-time images of the PCB to the control system.

6. The PCB waste marking apparatus of claim 5, further comprising:

the visual device is used for observing the PCB in real time and manually marking the PCB wastes;

the influence analysis system is used for controlling the control system to mark the PCB waste and recording the ID of the bad PCB according to the comparison result of the detection data acquired by the detection device and the standard sample data;

the data analysis system is used for analyzing the defective distribution of the PCB full page according to the ID frequency of the defective PCB acquired by the influence analysis system;

and the alarm device is used for alarming and feeding back a bad result to the front-end process when the bad distribution acquired by the data analysis system exceeds a preset value.

7. The PCB scrap marking apparatus of claim 6, wherein,

the marking mode of the marking head is ink jet, labeling, indentation, punching or cutting.

8. The PCB scrap marking apparatus of claim 3, wherein,

the first driving device, the second driving device, the third driving device and the fourth driving device are electric cylinders and/or air cylinders.

9. A PCB waste marking method for marking a defective PCB in a PCB imposition using the PCB waste marking apparatus of any one of claims 3 to 8, the method comprising:

conveying the PCB above the supporting plate through a first conveying belt and a second conveying belt;

fixing the PCB on the supporting plate and lifting the PCB under the action of the supporting plate;

and marking the bad PCB by a marking unit.