JPH08323519A - Printed wiring board perforating method - Google Patents

Abstract

PURPOSE: To accurately perforate through a printed wiring board by imaging in accordance with the position data of an identification mark within the whole memorized printed wiring board, detecting the central position of the identification mark by picture processing and perforating through the central position. CONSTITUTION: All position data are memorized and stored after all perforating work of a first printed wiring board and computing of position data within the whole printed wiring board of all identification marks are completed. Printed wiring board perforating work thereafter is performed by complete automatic operation. Since position data memorized at this time is fairly accurate, fine adjustment by jog switching can be dispensed with and correction of data such as a pitch is not required because identification marks come accurately into the image region of an imaging means 11 by imaging in accordance with the memorized position data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of punching a printed circuit board. More specifically, the printed circuit board on which identification marks are previously formed is divided into a desired matrix shape, and each divided area is divided. The present invention relates to a method of drilling a printed circuit board in which a reference hole is formed at a position of an identification mark provided.

[0002]

2. Description of the Related Art A printed circuit board is provided with a reference hole as a reference for processing a hole for a circuit element or mounting a circuit element in advance. When a large number of parts are obtained from one printed circuit board, the number of processes in the post-process is increased and a large number of reference holes are required accordingly. Specifically, as shown in FIG. 9, these reference holes divide one substrate into a matrix, and at least two positioning marks A, are provided for each of the sections K1, K2, K3. B, C ... Are provided and a hole is drilled at the center position of this mark.

The procedure for drilling is to input the data required for drilling into the drilling device with a keyboard, and drill based on these input data in order of A, B to G, H ... . The data is input at this time from the reference point (one end of the printed circuit board) indicated by a black circle at the upper right end, the coordinates of the first hole mark A, the second hole mark B, and the first hole mark A. In addition to the pitch (Py) between the mark C of the third hole and the mark C of the third hole and the pitch (Px) between the mark A of the first hole and the mark G of the seventh hole located on the left side, the substrate size and X Normally, about 10 items are required such as the number of divisions (divisions) indicating the number of divisions (sections) of the printed circuit board in the Y-direction and the Y-direction.

[0004]

In the above-described conventional method for making holes, data is input while measuring each dimension of each item using a scale.
There is a lot of manual work such as measurement and keyboard operation, and it takes time to input it. In addition, if the dimensions are not measured accurately, there is a problem in that all holes cannot be formed.

SUMMARY OF THE INVENTION An object of the present invention is to allow a printed board to be drilled at an accurate position by a simple operation.

[0006]

In order to achieve the above object, the present invention relates to a plurality of printed circuit boards having a plurality of identification marks, each corresponding to the identification mark at its center position. In the method for boring a printed circuit board to be perforated, for the first printed circuit board, a step of imaging the approximate position of the identification mark by an imaging means, and printing when at least a part of the identification mark is outside the image area After the substrate is moved relative to the image pickup means to finely adjust the image pickup position, the center position of the identification mark in the image area is detected by image processing, and a hole is formed in the center position of the detected identification mark. Based on the dawning process, the image pickup position after the fine adjustment, and the center position of the identification mark in the image area, the identification mark in the entire printed circuit board is displayed. A series of steps including the process of calculating and storing the placement data is performed for all identification marks, and when the printed circuit board is pierced thereafter, the identification of the entire printed board is performed. The image pickup device is characterized in that an image is picked up in accordance with the position data of the use mark, the center position of the identification mark is detected by image processing, and the center position is punched.

The image pickup position of the first printed circuit board at the time of punching is obtained by dividing the printed circuit board into matrix-shaped sections, and the number of sections in the X direction and the number of sections in the Y direction and identification marks in each section. It is preferable to determine by specifying the approximate position.

And, more preferably, the following method is adopted. The number of sections in the X direction and the number of sections in the Y direction are designated by designating one square in the matrix pattern displayed on the input screen provided in the input means, thereby designating the number of sections in both directions. Is.
Designation of the approximate position of the identification mark in the section regards the input screen as indicating one of the sections,
By designating a desired grid of the matrix pattern displayed on the input screen, the approximate position of the identification mark in the section is designated. Further, on the first printed circuit board, at the time of calculating the position data of the identification marks to be the reference, the relative positional relationship between the identification marks in one division and the relative position between the adjacent divisions. It is more effective to obtain the positional relationship and perform the above sequence for the remaining identification marks, with respect to the approximate position of the designated identification mark corrected based on the relative positional relationship.

By moving the printed circuit board and detecting the points where each side of the printed circuit board crosses the fixed sensor, the total length and width of the printed circuit board are obtained,
It is also effective to obtain the size of one section by dividing it based on the input number of sections.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows an outline of the punching device used in the present invention. The punching device is composed of a device body 1, a stocker unit 2, a charging machine 3 and a measuring unit 4. On the table 5 provided on the upper surface of the apparatus main body 1,
An XY robot 6 is provided for gripping and moving a printed circuit board as a work. A discharge roller 5a for discharging the perforated work is provided at the end of the table 5. The XY robot 6 has a clamp claw 6a, and the clamp claw is capable of gripping a workpiece and moving on the table 5 in the XY directions.

The stocker section 2 is located on the side of the apparatus main body 1 (on the left side in the drawing) and can accommodate a large number of printed circuit boards, which will be described later, inside. The loading machine 3 is installed on columns 7 standing upright on the apparatus main body 1, and a loading head 8 that feeds a workpiece to the XY robot 6 is provided on the lower part.
have. The loading head 8 is provided with an air chuck 9 and is capable of moving up and down, and the stocker section 2 and the table 5 are provided.
Can be moved over.

The measuring unit 4 has columns 7 and 7 similar to the loading machine 3.
Is supported above the table 5.
At the lower part of the measuring unit 4, there are provided a sensor 10 as a substitute for a scale for measuring the length of a printed circuit board, a TV camera 11 as an image pickup means for an identification mark, and a drill (not shown) as a drilling means. There is. The TV camera 11 is connected to an image processing device (not shown), and this image processing device can detect the center position of the mark imaged by the TV camera 11.

Inside the apparatus body 1, although not shown, a drilling means such as a drill and an XY for moving the drilling means.
A moving means including a table mechanism is provided. When the center position of the mark is obtained by image processing, the moving means moves the punching means to this center position to punch the printed board.

The sensor 10 is fixedly provided on the measuring unit 4, emits a laser beam downward, and prints the printed circuit board X, X.
It is possible to measure the total length and width of the printed circuit board by moving in the Y direction and detecting the point where each side of the printed circuit board crosses the laser light at the position facing the sensor.
The data measured by this sensor is stored in a storage circuit (not shown) housed in the measurement unit, and is used as data for calculating pitch and mark positions described later.

The TV camera 11 is attached so that the upper surface of the work held by the XY robot 6 can be picked up, and the picked-up image is a monitor screen provided on the front surface of the measuring section 4 via an image processing device. 12 can be displayed. A cursor composed of vertical and horizontal intersecting lines is displayed at the center of the imaging area displayed on the monitor screen 12.

An operation panel 13 is provided on the right side of the front of the measuring section 4 adjacent to the monitor screen 12. As shown in FIG. 3, the operation panel 13 includes a switch panel 14 on which various switches are arranged, and an input unit 15 including a touch panel.
It is composed of and. A screen of the input means 15 is created by a computer (not shown), and various commands can be input to the computer by pressing an input key displayed on the screen with a finger. By operating the input screen, various conditions for drilling and positioning can be performed as described later.

The printed circuit board W to be the work is the same as that shown in the section of the prior art (see FIG. 9),
Here, it is assumed that the same reference numerals as those in the related art are used.
The printed circuit board W is preliminarily partitioned on a matrix of a size that can be divided into a plurality of sheets in the vertical and horizontal directions. .. are divided into these matrix-shaped sections K1, K2, ... By division, each section becomes a single printed circuit board. In this embodiment, each of these sections K
It is intended to provide a reference hole necessary for forming a hole for a circuit element on the printed circuit board for each of K1, ... At the positions where these reference holes should be opened, the identification marks A,
B ... Is formed by printing.

Next, the process of boring using the boring machine described above will be described with reference to the flow chart shown in FIG.
Here, as shown in FIG. 9, the printed circuit board W has a total of 15 sections, the number of which is 5 in the X direction and the number of which is 3 in the Y direction, and is diagonally arranged for each of the sections K1, K2 ... In a matrix pattern. Are marked with identification marks A, B ... These printed circuit boards W are housed in the stocker unit 2 (see FIG. 3) and kept waiting for drilling.

First, a new switch for selecting data is selected by a selection switch (not shown) (here, the case where the punching process is performed on the printed circuit board for the first time is described, but the printed circuit board in which the punching data is already stored is selected. If used, choose to read existing data). Next, in the first input screen 15a as shown in FIG.
An arbitrary data name that becomes a file name at the time of saving is input, and a punching condition is input on the second input screen 15b shown in FIG. The drilling conditions entered at this time are the diameter of the drill,
It is whether to measure the substrate size automatically or manually. In this embodiment, the substrate size is automatically measured.

Next, a third input screen 15c for designating the number (division number) of the printed circuit board consisting of the matrix pattern P1 as shown in FIG. 6 is X with the upper right corner of the matrix pattern as a reference point. The number of picks in the direction (horizontal direction) and the number of picks in the Y direction (vertical direction) are displayed. Here, when the mesh M1 with X = 5 and Y = 3 is pressed, the mesh is inverted and the numbers of X and Y directions to be taken are designated simultaneously.

Then, a fourth input screen 15d shown in FIG.
At, the position of the identification mark is designated. A matrix pattern P2 is displayed on the fourth input screen 15d, and it is considered that the matrix pattern P2 represents one section of the printed circuit board W, and the approximate position of the position designation mark can be designated. It is a thing. That is, one section of the printed circuit board W of FIG.
Printed circuit board W
Identification mark, eg mark A, attached to one section of
The squares including is marked, and this square M2 is pressed to specify the approximate position of the identification mark A in one section. Similarly, the square containing the mark B is visually inspected, and this square M3
Is pressed to specify the approximate position of the identification mark B in one section. In this way, the position where the identification mark exists in one section is roughly specified. Of course 1
When the number of marks in the section is large, the number is specified on the input screen 15d.

Then, by pressing the start switch 13a of the operation panel 13 (see FIG. 3), a series of work for drilling is started. When the work is started, the computer operates to move the loading head 8 (see FIG. 2), and the air chuck 9 takes out the printed circuit board W from the stocker unit 2 and transfers it to the clamper 6a of the XY robot 6. The XY robot 6 moves on the table 5 and scans the printed circuit board W below the measurement area of the sensor 10 in both the X and Y directions. Here, the printed circuit board W is scanned in the X direction to detect two points across the fixed sensor 10, and the length in the X direction is obtained from the scanning amount (printed circuit board moving amount) at that time. Similarly, by scanning the printed circuit board W in the Y direction,
Two points that intersect the position facing the sensor 10 are detected and the length in the Y direction is obtained. The board size thus measured is stored in a storage circuit (not shown). Here, the pitch (Px, Py) (see FIG. 9) is calculated by dividing the dimensions of the printed circuit board based on the numbers of X and Y directions. By the work up to this point, various data inputs that were conventionally performed manually are completed.

Then, the printed circuit board W is moved by the XY robot 6, and the TV camera 11 (see FIG. 2) moves to the first position.
The position corresponding to the mesh M2 in the section (section on the upper right) is imaged. The image captured here is displayed on the monitor screen 12. At this time, since the designation of the mark position by visual measurement is uncertain, it is uncertain whether the identification mark A is included in the image-processable area in the image of the monitor screen 12 corresponding to the cells M2. is there. In some cases, the identification mark A may not be displayed on the monitor screen 12. Therefore, using the jog switch of the fifth input screen 15e shown in FIG. 8 while visually recognizing the cursor on the monitor screen 12, an image area near the center of the monitor screen 12 (an area where accurate image processing can be performed) is used for identification. The relative position between the printed circuit board and the image pickup means is finely adjusted so that the mark A comes. This jog switch is on the monitor screen 1
The image shown in 2 is composed of what is shown by the left and right arrows that make a minute movement in the X direction and what is shown by the up and down arrows that make a minute movement in the vertical direction. The image pickup means or the printed circuit board is moved. It is a mechanism switch. In addition,
Efficient adjustment is possible by appropriately selecting the high speed or low speed mode.

Here, the identification mark A is image-processed to accurately find the center position coordinates in the image area, and a hole is drilled at this center position. At the same time, the position of the identification mark A in the entire printed circuit board W is obtained based on the position of the square M2, the amount of movement during fine adjustment by the jog switch, and the center position coordinate in the image area. Store position data. It should be noted that even if the center of the cross-shaped cursor on the monitor screen and the center of the identification mark are visually aligned, it is not possible to expect very high accuracy, so image processing is used to perform punching and position data storage extremely accurately. .

Then, the printed circuit board W is moved by the XY robot 6, and the TV camera 11 (see FIG. 2) moves to the first position.
The position corresponding to the cell M3 in the section (upper right section) K1 is imaged and the image is displayed on the monitor screen 12. Then, in the same manner as described above, while visually observing the cursor on the monitor screen 12, the jog switch is used to
Fine adjustment is made so that the identification mark B comes near the center of. Then, the identification mark B is image-processed to find the coordinates of the center position in the image area, and a hole is drilled at this center position. At the same time, the accurate position of the identification mark B in the entire printed circuit board W is obtained based on the position of the square M3, the amount of movement during fine adjustment by the jog switch, and the center position coordinates in the image area. , Store this position data. Further, the relative positional relationship between the identification mark A and the identification mark B (the relative positional relationship between the identification marks within one division) is also obtained and stored.

Further, subsequently, an image of a certain range (approximate position of the identification mark C) in the second section K2 separated from the identification mark A by the pitch Py is displayed on the monitor screen 12, and the jog switch is used. Then, the fine adjustment is performed so that the identification mark C comes near the center of the monitor screen 12.
Then, the identification mark C is image-processed to accurately obtain the center position coordinates in the image area, and a hole is drilled at this center position. At the same time, the position data of the identification mark C in the entire printed circuit board W is calculated and stored based on the movement amount at the time of fine adjustment by the jog switch and the center position coordinates in the image area. Further, the pitch Py (relative positional relationship between adjacent sections) is corrected from the position data of the identification mark A and the identification mark C. As a result, the approximate positions of the other identification marks are all corrected.

Similarly, with respect to the identification marks D to F, an image of an approximate position determined based on the relative positional relationship between the marks, fine adjustment by a jog switch, image processing,
A sequence of drilling and calculating / storing position data is performed in sequence.

Next, an image of a certain range (approximate position of the identification mark G) in the fourth section K4 which is separated from the identification mark A by the pitch Px is displayed on the monitor screen 12,
The sequence of fine adjustment by the jog switch, image processing, drilling, calculation and storage of position data is performed. Further, the pitch Px (relative positional relationship between adjacent sections) is corrected from the position data of the identification mark A and the identification mark G.
As a result, the approximate positions of the other identification marks are all corrected.

Then, with respect to all the remaining identification marks, an image of an approximate position determined based on the relative positional relationship of each mark, fine adjustment by a jog switch, image processing, perforation, in the entire printed circuit board is performed. Position data is calculated and stored sequentially. It should be noted that the relative positional relationship and the correction of the approximate positions of the remaining identification marks are the reference marks (A, B, C, G in the present embodiment).
No. 4) is performed only when the position data is obtained, and is not corrected by other position data of the identification mark.

In this way, all the drilling work of the first printed circuit board and the calculation of the position data of all the identification marks in the entire printed circuit board are completed, and all the position data are stored and saved. To be done. After that, the XY robot 6 moves to the right end on the table 5, and the printed circuit board W is ejected out of the apparatus main body 1 via the roller 5a provided at the end of the table.

Subsequent drilling work of the printed circuit board is performed by fully automatic operation. That is, the printed circuit board is set, and for each identification mark, a series of operations of moving and imaging based on the stored position data, sequentially detecting the mark center position by image processing, punching, and ejecting are performed. Perform on the substrate. At this time, since the stored position data is quite accurate, if the image is taken according to this, the identification mark will surely enter the image area of the image pickup means, so that fine adjustment by the jog switch is unnecessary,
Neither pitch nor other data is corrected.

The present embodiment relates to the case where the identification mark exists at the same position in each section, but when the identification mark exists at a different position for each section, It suffices to specify at which position in which section the identification mark exists. Also, the invention need not necessarily be divided into sections. The order of drilling holes in the printed circuit board is not limited to the above embodiment. The structure of the punching means and the moving means can be arbitrarily selected. For example, punching may be performed with a punch and a die instead of the drill. The configuration of the input screen and switches can be set arbitrarily.

[0033]

According to the present invention, when a plurality of printed boards of the same kind are continuously drilled, one printed board is drilled and the identification marks of all the printed boards are identified. Since the position data is stored and the subsequent printed circuit board is drilled based on this position data,
A series of holes can be automated. Then, when the position data to be stored is calculated, the approximate position of the identification mark is designated in advance and finely adjusted to eliminate the need to input a numerical value, which eliminates the need for actual measurement and reduces accuracy. Work is easy without

Designation of the approximate position of the identification mark,
When the number of sheets to be taken from one printed circuit board is designated on the input screen displayed in the form of a matrix pattern, the input is extremely easy.

If the size of the printed circuit board is automatically obtained by detecting a point crossing the fixed sensor, the pitch of the holes can be automatically calculated, and the work is further simplified.

[Brief description of drawings]

FIG. 1 is a flowchart showing a drilling method of this embodiment.

FIG. 2 is a front view of a punching machine used for implementing the present invention.

FIG. 3 is a front view of an operation panel.

FIG. 4 is a front view showing a first input screen.

FIG. 5 is a front view showing a second input screen.

FIG. 6 is a front view showing a third input screen.

FIG. 7 is a front view showing a fourth input screen.

FIG. 8 is a front view showing a fifth input screen.

FIG. 9 is a plan view showing partitions and marks on a printed circuit board.

[Explanation of symbols]

 W Printed circuit board K1, K2 ... Section A, B ... Identification mark 5 Table 10 Sensor 11 Imaging means (TV camera) 12 Monitor screen 15 Input means (input screen) P1, P2 Matrix pattern

Claims (5)

[Claims] 1. A method of punching a printed circuit board, wherein a plurality of printed circuit boards each having a plurality of identification marks are drilled at a central position corresponding to each identification mark. With respect to the substrate, a step of imaging an approximate position of the identification mark by an imaging means,
When at least a part of the identification mark is outside the image area, the printed circuit board is moved relative to the imaging means to finely adjust the imaging position, and then the identification mark in the image area is subjected to image processing. Based on the center position of the identification mark in the image area and the image position after fine adjustment, the step of detecting the center position of Perform a series of steps consisting of a step of calculating and storing the position data of the identification mark in the entire printed circuit board for all the identification marks, and in the subsequent drilling of the printed circuit board. Takes an image according to the stored position data of the identification mark in the entire printed circuit board and performs image processing to identify the identification mark. A method for punching a printed circuit board, which comprises detecting a center position of a slab and making a hole at this center position. 2. The printed circuit board is divided into matrix-shaped sections, and the number of sections in the X direction and the number of sections in the Y direction and the approximate position of the identification mark in each section are designated, and based on this, The method for boring a printed circuit board according to claim 1, wherein an imaging position of the first printed circuit board is determined. 3. The designation of the number of sections in the X direction and the number of sections in the Y direction of the printed circuit board is performed by designating one square in a matrix pattern displayed on an input screen provided in the input means. , The number of sections in both directions is specified, and the approximate position of the identification mark in the section is regarded as indicating the input screen as one of the sections, and The hole of the printed circuit board according to claim 2, wherein the approximate position of the identification mark in the section is designated by designating a desired mesh of the displayed matrix pattern. Dawn way. 4. The relative position of the identification marks in one section at the time of calculating the position data of the identification mark to be used as a reference on the first printed board. The relationship and the relative positional relationship between adjacent sections are obtained, and with respect to the remaining identification marks, with respect to the position where the approximate position of the specified identification mark is corrected based on these relative positional relationships, the sequence described above. The method for boring a printed circuit board according to claim 2, wherein the method is performed. 5. The printed circuit board is moved to detect the point where each side of the printed circuit board crosses a fixed sensor to obtain the total length and width of the printed circuit board, and the total length and width of the printed circuit board. 5. The step of obtaining the size of one of the sections by dividing the number based on the input number of sections is included.
A method for punching a printed circuit board according to any one of 1.