JP2591914B2 - Perforator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling device for drilling a drill mark provided on a workpiece such as a printed board or a thin board with a drill.

[0002]

2. Description of the Related Art Conventionally, as a punching device of this type, a spotlight provided below a work table is used to irradiate a punching mark provided on a printed circuit board with light, as disclosed in Japanese Patent Publication No. 64-11404, and the transmitted image is formed. An image is received by an imaging device, the video signal is binarized, the binarized image is projected on a monitor screen, the binarized image is searched on the monitor screen, and the center position of the punch mark is detected by the image processing device. There is known an apparatus in which a drill is controlled by an XY feed mechanism in accordance with the detected value to perform drilling at the center of a drilling mark.

[0003]

However, in such a conventional technique, when the workpiece is formed of an opaque material, the center of the perforated mark cannot be detected. Further, it is necessary to secure a large space for installing a spotlight below the work table, and the apparatus itself becomes large. Further, the work is thermally deformed by the irradiation heat, and the accuracy of detecting the center of the perforated mark cannot be expected. In addition, chips are scattered on the work to reduce the perforation accuracy, and are scattered around the apparatus, which adversely affects not only the environment of the work room but also the hygiene management. Moreover, the degree of ball breaking is high, and the drilling operation is reduced. There were various problems.

[0004] The present invention has been made in view of the conventional circumstances, and it is an object of the present invention to obtain an image of a perforated mark and detect the center of the perforated mark irrespective of transparency or non-transparency. For other purposes, the device itself does not increase in size,
Moreover, it is an object of the present invention to provide a perforation apparatus capable of detecting the center without being affected by thermal distortion deformation due to irradiation heat. Still another object is a perforation apparatus which can obtain a clear transmitted image and a reflected image by condensing light on a perforation mark without entering of disturbance light and reflection of internal disturbance light to a lens of an imaging device. Is to provide. Another object of the present invention is to provide a punching device that can reliably collect chips.

[0005]

The technical measures taken to achieve the above object are as follows. Claim 1 is provided with a drill port,
A work table on which a work having a perforation mark is set, and a lower illumination unit provided below the work table and irradiating light to the perforation mark from below through a drill port;
An upper illuminating means provided above the work table for irradiating light to the perforation mark from above, and a transmission image of the perforation mark by the lower illumination means or a reflection image of the perforation mark by the upper illumination means provided on the work table. An imaging device for receiving an image, an image processing device for binarizing an image signal received by the imaging device, projecting the image signal on a monitor, and detecting the center of a perforated mark by searching for a binarized image on the monitor, And a feed mechanism connected to the image processing apparatus and the drill, the feed mechanism for correcting the movement of the drill in the X and Y directions at the detection center position of the perforation mark and perforating the drill at the center of the perforation mark. The gist is that the means and the upper illumination means can be switched. Claim 2
The gist of the invention is that the LEDs are arranged at equal intervals around the inner peripheral surface of the drill hole or the back edge thereof. According to a third aspect of the present invention, the upper illuminating means according to the first aspect is arranged side by side at equal intervals in the circumferential direction on an inner surface of a vertically movable illumination holder having a cylindrical shape formed of an opaque material.
ED, wherein the illumination holder has a lower half of a slightly larger diameter that abuts the workpiece and surrounds the perforated mark from above, and the imaging device is mounted so as to cover the upper opening of the illumination holder. That is the gist. Claim 4
The lower illuminating means according to claim 1 is attached around the back edge of the drill port, and is provided with a transparent illumination holder having a ring shape in a plan view, and the illumination holder is provided at equal intervals in a circumferential direction with an obliquely upward direction from below. A notch, and a plurality of Ls inserted and supported in the notch such that the tip is located below the drill hole.
The gist of the present invention is that it is formed of an ED and a plastic film covering the outer surface of the illumination holder except for an upper portion where the LED tip faces. According to a fifth aspect of the present invention, the upper illuminating means according to the first aspect includes a vertically movable illumination holder having a cylindrical shape formed of a transparent material, and a concave at an upper end surface of the illumination holder at an equal interval in a circumferential direction or endless in a circumferential direction. And a plurality of Ls which are inserted and supported side by side in the recess.
ED, comprising a plastic coating covering the inner and outer surfaces of the illumination holder except for the vicinity of the lower end portion and the recess, wherein the illumination holder is in contact with the perforation mark and surrounds the perforation mark from above, and has a slightly larger diameter. The gist has a lower half, and the image pickup device is attached so as to cover an upper opening of the illumination holder. Claim 6 is Claim 3
Alternatively, the gist is that a vacuum device for collecting chips is connected to the illumination holder of the upper illumination means described in 5.

[0006]

According to the above technical means, the following effects are obtained. (1) A transmission image and a reflection image by selectively using lower illumination means for irradiating light from below through a drill port and upper illumination means provided above a work table and irradiating light from above to a perforation mark. You can get both. Then, the transmitted image and the reflected image are displayed on a monitor as a binarized image, and the binarized image is searched from a cursor on the monitor to detect the center of the drilling mark at high speed and accurately. The hole is pierced at the detection center by the correction movement. Therefore, the center of the perforation mark of a workpiece formed of a material from which a transmission image can be obtained or a workpiece (opaque material) formed of a material from which only a reflection image can be obtained is detected and switched by switching between a lower illumination unit and an upper illumination unit. (Claim 2) The downward illumination of the LED from a position close to the perforation mark is directed toward the perforation mark. (Claim 3) Irradiation of the upper illumination of the LEDs arranged side by side in the circumferential direction of the inner peripheral surface of the illumination holder for preventing the penetration of disturbance light from the opening in the lower half part of the larger diameter surrounding the perforation mark to the perforation mark. Let it. (Claim 4) The penetration of disturbance light is prevented by a plastic film covering the outer surface of the transparent lighting holder. Down lighting,
The light is focused on the perforated mark from the upper part without plastic coating through a transparent lighting holder. (Claim 5) The penetration of disturbance light is prevented by a plastic coating covering the outer surface of the transparent illumination holder, and the reflection of the disturbance light to the lens of the imaging device is prevented by the plastic coating covering the inner surface of the illumination holder. To prevent. The upper illumination passes through the transparent illumination holder and is focused on the perforated mark from the vicinity of the lower end without the plastic coating. (Claim 6) Collecting chips on the work surface from inside the lighting holder to another place.

[0007]

As described above, the present invention has the following advantages. (Claim 1) Since the perforation device is capable of switching between a lower illuminating means for obtaining a transmitted image of the perforated mark and an upper illuminating means for obtaining a reflected image of the perforated mark, a transparent material,
Regardless of which material is impermeable, the center of the perforated mark can be detected and perforated. (Claim 2) The lower illuminating means for obtaining a transmission image of the drilling mark is constituted by an LED which is less likely to break and which can perform the drilling operation permanently, and which is arranged around the inner peripheral surface of the drill hole or around the back side edge thereof. The structure is arranged at equal intervals so that cold light that does not thermally deform the work is radiated to the perforated mark from a close position through the drill hole, so that the work is slightly deformed or the edge is deformed due to the heat distortion. There is no danger of forming a shadow on the image, and a clear transmitted image can be obtained. Moreover, only a small area near the drill port is occupied, and the apparatus itself can be reduced in size. (Claim 3) Irradiation of the upper illumination of the LEDs arranged side by side in the circumferential direction of the inner peripheral surface of the illumination holder for preventing the penetration of disturbance light from the opening in the lower half part of the larger diameter surrounding the perforation mark to the perforation mark. As a result, it is possible to prevent the workpiece from being slightly bent due to the thermal strain deformation and to prevent disturbance light from entering, and to concentrate the light on the perforated mark, thereby obtaining a clear reflected image. (Claim 4) A transparent illumination holder of the LED is covered with a plastic film except for a portion near the upper side facing the LED tip, and a light having a predetermined luminous intensity which is not affected by disturbance light is formed in a perforated mark portion. And a clearer transmission image can be obtained. (Claim 5) Disturbance light is prevented by a plastic film covering the outer surface of the illumination holder except for the lower end portion, and reflection of internal disturbance light to the lens of the imaging device covers the inner surface of the illumination holder except for the lower end portion. It is prevented by the plastic coating. Therefore, light of a predetermined luminous intensity is focused on the perforated mark portion,
It is possible to obtain a clearer reflected image without adverse effects due to disturbance light or internal disturbance light. (Claim 6) Since the chips are sucked and collected in other places without scattering from the inside of the lighting holder to the outside, the chips are scattered on the work to reduce the perforation accuracy, or the chips are scattered around the device. The light holder is also used as a suction part without being scattered and adversely affecting hygiene management, and means for supporting the light source (lighting holder)
In addition, there is no need to separately support a nozzle for removing chips, thereby contributing to significant simplification of the apparatus.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 5 show the first embodiment, and FIGS.
Indicates the second embodiment.

First, a first embodiment will be described. Reference numeral A denotes a punching device. The punching device A includes a moving mechanism (not shown) having a printed circuit board (to be described later with reference numeral 100) as a workpiece 100. ), The devices and mechanisms required for the upper case A1 and the lower case A2, which are close to each other with the approach space a interposed therebetween.

The upper case A1 has an open lower surface at the tip end as shown in FIG.
An imaging device 2 for receiving 100 perforation marks 101, an image processing device 3 for performing image processing on an image signal received by the imaging device 2 and binarizing the image signal, and displaying a binarized image in cooperation with the image processing device 3 The monitor 4 and the like are built in.

On the other hand, the lower case A2 has an upper surface serving as a work table 5 as shown in the figure, and a drill port 15 is formed at a predetermined position on the work table 5, and a drill 6, a feed mechanism 7 for the drill, and a lower light are provided. Means 8 and the like are built in.

The upper illuminating means 1 has LEDs 9 arranged at equal intervals on an inner peripheral surface near an upper end of a substantially cylindrical illumination holder 11 formed of an opaque material.
The vacuum device 10 is mounted on the inclined cylinder 21 protruding from an appropriate position in the upper half.
And a supporting arm 31 fixed to the lower end, and the supporting arm 31 is moved up and down by an elevating mechanism (not shown). The printed circuit board 100 can be lightly pinched.

The lighting holder 11 has a lower half 11a.
Is a perforated mark 101 whose diameter is attached to the printed circuit board 100.
The lens tube 12 of the image pickup device 2 is fitted in the upper end opening, and the lens tube 12 and the upper end opening edge are connected to a flexible tube.
The connection is made at 22 so that the vertical movement is not hindered by the extension action of the flexible tube 22, and the space inside the lighting holder 11 can be completely isolated from the outside when the printed circuit board 100 contacts.

The lower illuminating means 8 is formed by piercing holes 28 at equal intervals in the circumferential direction with an obliquely upward direction in an illumination holder 18 formed of an opaque material and having a ring shape in a plan view.
And a lighting holder 18 having the LED 9
Is formed around the back edge of the drill port 15 of the work table 5 as shown in the figure, and the LED 9 emits light obliquely upward toward the drill port 15.

The image pickup device 2 includes the moving mechanism (not shown).
This is a CCD camera disposed so as to face directly above the perforation mark 101 of the printed circuit board 100 which is sent so as to face the drill port 15 under automatic control.

The image processing device 3 converts the video information converted into a digital signal by an A / D converter (not shown) into a digital signal.
An image processing circuit 13 for performing arithmetic processing such as binarization, an image memory 23 for storing the binarized data, a central processing unit 33 for executing a predetermined control program, and necessary data for the central processing unit 33 And a storage unit 43 for storing the grayscale image signal of the perforation mark 101.
, And can be written into the image memory 23.

Reference numeral 4 denotes a monitor which displays the image in the image memory 23 and scans the coordinate system from the center of the cursor.

The above-mentioned lower illumination means 8 and upper illumination means 1
Is configured to be switchable.

The feed mechanism 7 of the drill adjusts the feed amount of the X, Y axis feed mechanism 27 by a command sent to the X, Y axis driver circuit 17 linked to the central processing unit 33 via the I / O port 53. It is controlled.

Next, the operation of the punching device according to the first embodiment will be described. Drilling mark 10 by moving mechanism (not shown)
The printed circuit board 100 is transferred to the entrance space a between the upper case A1 and the lower case A2 so that 1 is located immediately below the lower end opening of the illumination holder 11. This transfer amount is previously taught. Next, the upper illuminating means 1 descends to lightly clamp the printed circuit board 100. Then, the lower lighting means 8 and the upper lighting means 1 are selected, and light is emitted from above or below. This selection is performed by a changeover switch, or a light reflection type photoelectric sensor (not shown) is provided, for example, so that switching can be automatically performed by automatic detection. Therefore, when the printed circuit board 100 is formed of a transmissive material, light is emitted from the lower illumination means 8 to the perforated mark 101 through the drill hole 15, and the printed circuit board 100 is formed of a non-transmissive material. If it is formed, light is emitted from the upper illumination means 1 to the perforated mark 101. Since both the light from the lower illuminating means 8 and the light from the upper illuminating means 1 are uniformly irradiated around the edge of the perforated mark 101, there is no danger of forming a shadow around the edge, and a clear transmitted image and a reflected image are obtained. be able to. Then, the transmission image or the reflection image is received by the imaging device 2, the image signal is subjected to image processing by the image processing device 3, and the binarized image is enlarged and displayed on the monitor 4. The image processing device 3 searches the binarized image from above the center of the cursor on the screen of the monitor 4 to detect the center of the perforation mark 101. In the image processing device 3, a threshold value for black and white determination is set, and a level higher than the threshold value is determined as white or black, and a lower level is determined as black or white. Of the vertical image is searched for in the X and Y directions to find the intersection of the perpendicular bisector between each of the two points where the gradation changes, and the intersection is marked with a perforated mark
101 can be the center. Then, a correction distance calculated with respect to the center of the cursor based on the detection is calculated as an error between the center of the drilling mark 101 and the center of the drill 6,
Based on the calculated values, the central processing unit 33 corrects and moves the feed mechanism 7 so that the center of the perforation mark 101 and the center of the drill 6 coincide with each other, and the drill 6 is moved upward by the solenoid 37 and the air cylinder 47. A hole is made at the center of the mark 101. The center of the perforated mark 101 can be detected quickly and accurately by the image processing device 3. Further, the vacuum device 10 is operated at or before the perforation, and the chips are sucked from the lighting holder 11 and collected at another place.

As described above, in the first embodiment, the lower illumination (lower illumination means) and the upper illumination (upper illumination means) are formed by molding the printed circuit board 100 with a molding material (transmissive molding material), It is possible to switch by using a molding material having a characteristic, and to radiate the cool light from the LED 9 uniformly from all around the edge of the perforated mark 101. Then, a reflection image can be obtained, and the center of the perforation mark 101 can be perforated with high precision. Moreover, since the chips are sucked by the vacuum device 10, the chips are not scattered on the printed circuit board 100, the device, or the work room.

Next, a second embodiment will be described. In this embodiment, clearer transmission images and reflection images can be obtained, and the lower illumination means 8 and the upper illumination means are different from those of the first embodiment. Since only the specific structure of 1 is different, the other configurations are the same, and thus the same reference numerals are given and the description is omitted.

The lower illuminating means 8 is formed by forming notches 48 in a transparent illumination holder 38 having a ring shape in plan view at an obliquely upward direction from the lower side at equal circumferential intervals.
The ED 9 is inserted and supported, and the outer surface of the illumination holder 38 is covered with a plastic film 58 except for the upper part where the LED 9 tip faces.

The illumination holder 38 is made of a transparent material such as acrylic or polycarbonate, and has the same shape as the illumination holder of the first embodiment.

The plastic film 58 is made of nickel-based plastic plating. The outer surface of the above-mentioned lighting holder 38 is mirror-finished, and is coated on the outer surface portion except for the upper portion where the front end of the LED 9 faces.

The plastic film 58 prevents light from entering and allows light of a predetermined luminous intensity to be focused on the perforated mark 101 only from the transparent illumination holder 38 facing the LED 9 tip. This prevents unevenness of the luminous intensity due to spotting or disturbing light of the transmitted image due to the irradiation of light from all sides of the illumination holder 38, and uniformly condenses light of a predetermined luminous intensity on the perforated mark 101 from around the edge. And a clear transmission image can be obtained.

The upper illuminating means 1 is provided with recesses 51 at equal intervals in the circumferential direction or endlessly in the circumferential direction on the upper end surface of a lighting holder 41 formed of a transparent material and having the same shape as the lighting holder of the first embodiment. The LED 9 is inserted into and supported by the recess 51, and the inner and outer surfaces of the illumination holder 41 are covered with a plastic coating 61 except for the vicinity of the lower end and the recess 51.
The structure is covered with. The vicinity of the lower end of the illumination holder 41 is a cut surface 41a that is inclined from the inside to the outside as shown in the figure.

The plastic coating 61 is made of the same nickel-based plastic plating as described above. The inner and outer surfaces of the illumination holder 41 are mirror-finished, and the cut surface 41 a near the lower end and the recess 51 are removed. Inner and outer surface parts are covered, and disturbance light enters
The cut surface 41a, which has no coating by preventing reflection to 12a.
Then, light having a predetermined luminous intensity is focused on the perforation mark 101.

As described above, in the second embodiment, light of a predetermined luminous intensity is focused on the perforated mark 101 from around the edge without being affected by disturbance light or internal disturbance light. A reflected image can be obtained, and the center of the perforation mark 101 can be detected with high accuracy and perforation can be performed.

Incidentally, light may be condensed on the perforated mark 101 by providing a structure in which the plastic film 61 is not provided in a desired area on the inner surface near the lower end of the illumination holder 41 described above. In this case, the cut surface 41a is not necessary.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a drilling device according to a first embodiment.

FIG. 2 is a partially enlarged sectional view of a main part.

FIG. 3 is a sectional view taken along line (3)-(3) of FIG. 2;

FIG. 4 is a plan view of a lower illumination unit.

FIG. 5 is a block diagram showing linkage of each mechanism and devices of the punching device.

FIG. 6 is a partially enlarged cross-sectional view showing an upper illumination unit of the second embodiment.

FIG. 7 is a partially enlarged cross-sectional view showing a lower illumination unit of the second embodiment.

[Explanation of symbols]

A: Perforator 100
: Work 101: Drilling mark 8
: Lower lighting means 1: Upper lighting means 2:
Imaging device 5: Work table 3:
Image processing device 6: Drill 7:
Feed mechanism 15: Drill port 18:
Lighting holder for lower lighting means (opaque lighting holder) 11: Lighting holder for upper lighting means (opaque lighting holder) 11a: Lower half 28: Hole 51:
Recesses 58, 61: Plastic coating 10:
Vacuum device 38: Lighting holder for lower lighting means (transparent lighting holder) 48: Notch 41: Lighting holder for upper lighting means (transparent lighting holder) 4: Monitor

Claims (6)

(57) [Claims] 1. A work table provided with a drill port, on which a work having a drill mark is set, and a lower illumination means provided below the work table and irradiating light from below through the drill port to the drill mark, An upper illuminating means provided above the work table for irradiating light to the perforation mark from above, and a transmission image of the perforation mark by the lower illumination means or a reflection image of the perforation mark by the upper illumination means provided on the work table. An imaging device for receiving an image, an image processing device for binarizing an image signal received by the imaging device, projecting the image signal on a monitor, and detecting the center of a perforated mark by searching for a binarized image on the monitor, And the image processing device and the drill, and the drill is moved in the X and Y directions at the detection center position of the drilling mark to perform the drilling operation. A perforation device for perforating at the center of the workpiece, wherein the lower illumination means and the upper illumination means are switchable. 2. An LE, wherein the lower illuminating means is disposed at equal intervals around the inner peripheral surface of the drill hole or the back edge thereof.
The perforator according to claim 1, wherein the perforator is D. 3. The upper illuminating means is an LED arranged at equal intervals in a circumferential direction on an inner surface of a vertically movable illuminating holder having a cylindrical shape formed of an opaque material, and the illuminating holder is provided with a workpiece. 2. The image pickup device according to claim 1, further comprising a lower half part having a diameter larger than that of the illumination holder and surrounding the perforation mark from above, and covering the upper opening of the illumination holder. Perforator. 4. The lower illuminating means is provided around a rear edge of the drill port and is provided with a transparent illumination holder having a ring shape in a plan view, and the illumination holder is provided at equal intervals in a circumferential direction obliquely upward from below. Formed with a notch, a plurality of LEDs inserted into and supported by the notch so that the tip is located below the drill hole, and a plastic film covering the outer surface of the lighting holder except for an upper portion where the LED tip faces. The perforation apparatus according to claim 1, wherein the perforation is performed. 5. The illumination device according to claim 1, wherein the upper illumination means comprises a cylindrically shaped illumination holder which is made of a transparent material and which can be moved up and down, and a recess which is provided at an upper end surface of the illumination holder at equal intervals in the circumferential direction or endless in the circumferential direction. A plurality of LEDs juxtaposed and supported in parallel in the recess, and a plastic film for covering the inner and outer surfaces of the lighting holder except for the vicinity of the lower end and the recess, wherein the lighting holder is provided with a perforated mark. 2. The image pickup device according to claim 1, further comprising a lower half portion having a diameter slightly larger than the contact hole and surrounding the perforation mark from above, and covering the upper opening of the illumination holder. Perforator. 6. The perforation apparatus according to claim 3, wherein a vacuum device for collecting chips is connected to the illumination holder of the upper illumination means.