KR20140100063A - Drilling machine for multilayer printed circuit board - Google Patents

Abstract

The present invention relates to a drilling machine for a multilayer printed circuit board, which comprises a drilling unit which forms a guide hole by drilling a circuit board with a drill, and supports the circuit board with a drilling clamp at a position corresponding to the drill at the opposite side of the circuit board; and an entry sheet supplying unit which supplies an entry sheet between the drilling clamp and the circuit board in order to prevent burrs and damage of the edge of the guide hole during drilling. The drilling machine can rapidly drill the guide hole at a relatively accurate position on multiple circuit boards when manufacturing a multilayer printed circuit board, and can increase productivity by removing the need to replace a drill when drilling a direction hole or an etching hole with a different diameter from that of a reference hole. Moreover, the drilling machine can increase the quality of a circuit board by preventing increase in the diameter of a drill hole of the drilling clamp and the generation of burrs by supplying the entry sheet in a process of forming the guide hole on the circuit board, can prevent the waste of working hours due to frequent replacement of the drilling clamp by extending the life of the drilling clamp, and can prevent the degradation of productivity accordingly.

Description

[0001] The present invention relates to a drilling machine for a multilayer printed circuit board,

The present invention relates to a drilling machine for a multilayer printed circuit board, in which a structure is improved so that a guide hole can be efficiently drilled in a plurality of circuit boards in manufacturing a multilayer printed circuit board, and furthermore, burrs And more particularly, to a drilling machine for a multilayer printed circuit board which automatically supplies an entry sheet to prevent the occurrence of an accident.

Recently, electronic parts for surface mounting such as IC chips, resistors, capacitors and the like are miniaturized, and a printed circuit board on which these electronic parts are mounted is required to have a high density, so that a conductor pattern layer and an insulating layer are alternately stacked so that a conductor pattern layer is disposed on both surfaces A multilayer printed circuit board having a multilayer structure is used. A method of manufacturing such a multilayer printed circuit board will be described in brief with reference to FIG.

1, marks for guide holes for post processing, for example, marks for two reference holes, marks for one directional hole for inner / outer identification, marks for four etching holes, and the like are formed on an insulating substrate, The conductive layer 11b is entirely formed of a conductive material such as a copper foil on both surfaces of the insulating layer 11a and then the holes for the guide holes are drilled by a drilling machine to form guide holes 14 including reference holes, The circuit board 11 constituting the outer layer of the multilayer printed circuit board is provided. Alternatively, the conductor pattern layer 12b may be formed by etching the conductive layer formed on the insulating substrate 12a in a predetermined pattern on the basis of the etching holes, A circuit board 12 constituting an inner layer of the circuit board is provided.

The circuit boards 11 and 12 are aligned so that the circuit boards 11 and 12 are aligned with respect to the directional hole and the fins positioned in correspondence with the reference holes in the jig plate are inserted into the reference holes. Prepregs 13 having insertion holes corresponding to the reference holes of the circuit boards 11 and 12 are inserted between the circuit boards 11 and 12 and aligned. Then, the circuit boards 11 and 12 are temporarily fixed so as to be maintained in an aligned state, and then the both sides of the circuit boards 11 and 12 are heated and pressed with a high temperature and high pressure press. Then, the prepregs 13 are fusion-bonded to the conductive layers 11b or the conductor pattern layers 12b located on both sides, so that they are integrated into a single multilayer printed circuit board.

Thereafter, the conductive layer 11b of the circuit board 11 located at both outermost sides is etched in a predetermined pattern to form a conductor pattern layer, and a drilling process is performed to connect the conductor pattern layers. Then, the plating process, the anti-rust treatment process, and the like are performed, and the multilayer printed circuit board is finally cut out to have the necessary external shape.

As described above, various holes, particularly reference holes, formed in the circuit boards 11 and 12 are standard in the manufacture of a multilayer printed circuit board, The yield may be lowered. Such a reference hole machining error can be caused by various causes such as a change in the amount of movement due to long-term use of the transfer mechanism, a relative positional change between the X-ray generator and the camera for measuring the position of the guide mark, and an aging change.

The drilling machine according to the related art is mostly configured to form a direction hole and an etching hole with the same diameter as the diameter of the reference hole. When it is necessary to form the diameter of the direction hole and the etching hole different from the diameter of the reference hole, It is necessary to replace them, so that the productivity may be deteriorated due to the replacement time.

Meanwhile, in the process of drilling the guide hole 14 of the circuit boards 11 and 12, a burr may be formed on the edge of the guide hole 14. [

An entry sheet can be utilized to prevent the occurrence of such burrs. There are various limitations in manually laying out such an entry sheet on a circuit board by an operator.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above problems, and it is an object of the present invention to provide a method of manufacturing a multilayer printed circuit board in which guide holes can be quickly drilled in a plurality of circuit boards at relatively accurate positions, And it is an object of the present invention to provide a drilling machine for a multilayer printed circuit board which can increase productivity without drill replacement when it is necessary to drill a hole or an etching hole.

Furthermore, it is an object of the present invention to automatically supply an entry sheet so as to prevent burrs on the rim of the perforated guide hole, thereby increasing the quality of the circuit board and extending the life of the drilling clamp, have.

In order to achieve the above object, a drilling machine for a multilayer printed circuit board according to a preferred embodiment of the present invention is characterized in that a circuit board is drilled with a drill to form a guide hole, Drilling means configured to support the circuit board with a drilling clamp at a location where the drilling means is located; And entry sheet feeding means for feeding the entry sheet between the drilling clamp and the circuit board so as to prevent burrs and damage from occurring at the edges of the guide holes when drilling.

Here, the entry sheet feeding means may include: a feed frame provided in association with the drilling means; An uncoiler and a coiler installed on both sides of the drilling means in the supply frame for uncoiling and coiling the entry sheet; And a feeding unit installed at a rear end of the uncoiler in the feed frame to move the entry sheet to the coiler side so that a fine piercing portion of the entry sheet is positioned between the drilling clamp and the circuit board after drilling .

The feeding unit may further include: a push roller that rotates while pressing down the entry sheet uncoiled from the uncoiler; A push cylinder member installed in the supply frame and associated with the push roller to move the push roller up and down; A drive roller disposed below the push roller in the supply frame and rotated to move the entry sheet to the coiler side; And a servo motor for providing a rotational driving force to the drive roller.

The entry sheet feeding means includes a lift portion that is provided at a rear end of the feeding portion and at a front end of the coiler in the feeding frame and lifts the entry sheet so that the entry sheet is spaced apart from the circuit board when moved. As shown in FIG.

At this time, the elevating portion includes: a supporting roller for supporting the lower surface of the entry sheet upward; And an elevating cylinder member installed in the supplying frame and connected to the supporting roller to elevate the supporting roller.

In addition, it is preferable that the uncoiler and the coiler are rotationally driven by a torque motor so as to rotate while maintaining the tension of the entry sheet.

The drilling clamp may include: a clamp body having an intake hole connected to a vacuum intake line; And a clamp pad attached to a lower portion of the clamp body, wherein when the drill is drilled, the clamp pad is drilled to form a drill hole communicating with the intake hole, Holes through the vacuum intake line.

Meanwhile, the drilling unit is installed in a central frame so that a circuit board for manufacturing a multilayer printed circuit board is supplied from one side and placed on an upper surface, and the circuit board can be horizontally transferred along the Y axis direction by a table driving unit A transfer table; A pair of XY stages arranged on the base frame so as to be spaced apart from each other below the transfer table and arranged on the same plane, and a Y stage arranged on the upper side of the X stage; A pair of detection units arranged to correspond to the XY stages and capable of reciprocating in the X-axis direction, respectively, for detecting the positions of the guide hole marks on the circuit board; And moving the guide holes for the guide holes based on the information detected by the detection units and piercing the guide holes, respectively, so as to reciprocate the X and Y axes between the transport table and the XY stages, Two pairs of drill units arranged to be arranged in the Y-axis direction and arranged to be able to move up and down in the Z-axis direction by a lift driving unit and each having drill mounted on a rotatable spindle; .

Here, the detection units may include an X-ray source for radiating an X-ray to the circuit board and for inspecting the marks for the guide hole, so that the position detection can be performed by photographing the marks for the guide hole when the marks for the guide- Generator, and a vision device for photographing the image viewed by the X-ray generator.

The x-ray generators are respectively disposed above the transfer table and are fixed to the X stages one by one so as to be reciprocally defined in the X-axis direction. The vision devices are respectively disposed below the transfer table, And is fixed to the Y stages one by one so as to reciprocate in the X-axis direction together with the generators and independently reciprocate in the Y-axis direction.

In addition, it is preferable that the pair of drill units and one vision unit provided for each of the Y stages are arranged so that their centers are aligned on the same line in the Y-axis direction.

Further, the X-ray generators are located outside the region where the X-rays are emitted when detecting the marks for the guide holes, and close the X-ray emitting portion when the guide holes are drilled in the marks for the guide holes, It is preferable that each of the drilling clamps is further provided with a drilling clamp installed so as to reciprocate in the X axis direction and the Z axis direction by the clamp driving unit with respect to the circuit board so as to fix the circuit board when the guide holes are respectively formed in the marks.

It is preferable that the drilling clamp further includes an upper discharging means for sucking the generated chip debris while the guide holes are formed in the guide hole marks and discharging the debris to the outside.

In addition, it is preferable that the vision apparatus further include a lens barrel for guiding the X-ray to the circuit board between the X-ray generator and the circuit board when detecting the marks for the guide hole, respectively.

On the other hand, on the upper side of the center frame, a central clamp is further provided so as to be movable in the Z-axis direction so as to fix the central part of the circuit board when the guide holes for the guide holes are punched, The auxiliary clamps may be further provided on one side of the drilling clamps so as to be able to move up and down in the Z-axis direction so as to prevent lifting of edges of the circuit boards.

It is preferable that the central frame further includes a reference plate that is capable of calculating and correcting position errors of the drill units and the X-ray generators based on the data photographed from the vision devices.

It is preferable that the pair of drill units provided for each of the Y stages be capable of mounting two types of drills one by one when two types of guide holes having different diameters are drilled in the circuit board.

In addition, the table driving unit preferably includes a linear motor.

In addition, it is preferable that the transfer table further includes a sucking means for sucking and fixing the circuit board to the transfer table.

It is preferable that the drill units further include lower discharge means for sucking the generated cutting debris around the spindle while guiding holes are formed in the guide hole marks, and then sucking and discharging the cutting debris to the outside.

The drilling machine for a multilayer printed circuit board according to the present invention has the following effects.

First, when a pair of XY stages are provided on both left and right sides, and a pair of drill units are divided into a pair and mounted on the XY stage, if drilling of a direction hole or an etching hole with a diameter different from that of the reference hole, The replacement is not necessary, so that the working time can be shortened and the productivity can be improved.

Secondly, since the reference plate is provided and the vision devices for detecting the marks for guide holes are also used for correcting the position errors of the drill units and the X-ray generators, a three-dimensional measuring device for correcting the position error has conventionally been separately provided It is effective even if it is not.

Thirdly, in scanning the guide hole marks of the circuit board, the position of the guide hole marks can be accurately detected by moving the transfer table in the Y axis using the linear motor and moving the detection unit in the X axis. In addition, since the vision device and the X-ray generator can be moved together in the X-axis direction, the relative positional error between the vision device and the X-ray generator can be minimized. Therefore, an effect that the machining accuracy of the guide hole can be enhanced can be obtained.

Lastly, according to the present invention, by supplying the entry sheet in the process of forming the guide hole of the circuit board, the diameter of the drill hole of the drilling clamp is not increased so as to prevent the occurrence of burrs, thereby improving the quality of the circuit board, By extending the life of the clamp, it is possible to prevent a waste of working time due to frequent replacement of the drilling clamp and thereby to prevent a decrease in productivity.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view for explaining an alignment process of circuit boards for manufacturing a conventional multilayer printed circuit board. FIG.
2 is a side view showing drilling means in a drilling machine for a multilayer printed circuit board according to a preferred embodiment of the present invention.
Fig. 3 is a plan view showing the transfer table in the drilling means of Fig. 2;
4 is a front view showing the transfer table of Fig.
FIG. 5 is a perspective view showing an example of a circuit board supplied to the drilling means of FIG. 2. FIG.
Fig. 6 is a plan view showing the arrangement of the drill unit and the detection unit in the drilling means of Fig. 2;
Figures 7 and 8 are a front view and a side view, respectively, of Figure 6;
Figs. 9 to 11 are diagrams for explaining operation examples of the drill unit and the detection unit of Fig. 8. Fig.
12 is a front view showing that the entry sheet feeding means is installed in the drilling means of FIG.
13 is an enlarged view showing an uncoiler, a feeding portion, and a lift portion in the entry sheet feeding means of Fig.
14 is a side view showing the uncoiler in Fig.
15 is a side view showing the feeding section in Fig.
16 is a side view showing the elevating portion in Fig.
17 is an enlarged view showing A in Fig.

A drilling machine for a multi-layer printed circuit board according to a preferred embodiment of the present invention includes drilling means for drilling a circuit board by drilling to form a guide hole, and an entry sheet And an entry sheet feeding means for feeding the entry sheet.

At this time, the drilling unit may be configured to support the circuit board with a drilling clamp at a position corresponding to the drill unit with the circuit board interposed therebetween.

In addition, the entry sheet feeding means supplies the entry sheet between the drilling clamp and the circuit board so as to prevent burrs and damage from occurring on the rim of the guide hole when drilling.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 2 is a side view showing a drilling means in a drilling machine for a multilayer printed circuit board according to a preferred embodiment of the present invention, and FIG. 3 is a plan view showing a transfer table in the drilling means of FIG.

2 and 3, when the circuit board 20 as shown in Fig. 5 for manufacturing a multilayer printed circuit board from one side is supplied, the drilling means 100 of the present invention is configured such that, The XY stage 120, the drill unit 130, and the like are provided for detecting the marks 23 for the guide holes in the guide holes 20 and then drilling the guide holes for the guide holes 23, , And a detection unit (150).

The transfer table 110 is mounted on the central frame 101 so that the circuit board 20 supplied from one side can be moved horizontally along the Y-axis direction by the table driving unit by being mounted on the upper surface, So that the circuit board 20 can be transported along the Y-axis direction.

The suction unit 112 is provided on the transfer table 110 so that the circuit board 20 placed on the upper surface can be fixed without slipping from the transfer table 110. The suction unit 112 is configured to suck the circuit board 20 by generating a negative pressure on the upper surface of the transfer table 110. The circuit board 20 is discharged by a discharge unit 180 The state in which the circuit board 20 is sucked can be released.

The drill 131 of the drill unit 130, which will be described later, allows the drill 131 to pass through when the guide hole is drilled in the circuit board 20, which is mounted on the upper surface of the transfer table 110, The transfer table 110 is preferably formed of a material through which the penetration area 110a can be easily formed. However, the transfer table 110 is not limited thereto.

The table drive unit for transferring the transfer table 110 as described above is arranged so as to increase accuracy of processing of the guide hole with respect to the circuit board 20 by accurately transferring the circuit board 20 placed on the transfer table 110, It is preferable to include the linear motor 111 as shown.

As shown in FIG. 3, a discharge unit 180 is provided behind the transfer table 110 so that the circuit board 20 can be discharged after the guide hole has been formed in the circuit board 20. Here, the discharge unit 180 may be variously configured to perform a pick and place operation. For example, the discharge unit 180 may be moved to a suction position to suction the circuit board 20, A plurality of adsorption pads 181 and a conventional driving unit 182 for reciprocating them in the Y-axis direction.

A reference plate 102 is preferably provided on the central frame 101 on which the transfer table 110 is installed so as to correspond to the upper portion of the vision devices 156 to be described later with reference to FIGS. And the positional error of the drill units 130 and the X-ray generators 151, which may be caused due to aging or the like, based on the photographed data, can be calculated and corrected by being photographed from the vision apparatuses 156. [ Here, the reference plate 102 may have a structure in which correction holes are formed at regular intervals as a metal material having a minute deformation. With the provision of the reference plate 102 as described above, it is possible to use the vision devices 156 that detect the mark 23 for the guide hole in correcting the position error of the drill units 130 and the X-ray generators 151 Therefore, it is not necessary to separately provide a three-dimensional measuring device for correcting the position error.

On the other hand, the XY stage 120 is installed on the base frame 103 so as to be disposed below the transfer table 110 described above. As shown in FIGS. 6 and 7, the XY stage 120 is divided into left and right sides, As shown in FIG. Each XY stage 120 includes an X stage 121 moved in the X axis direction and a Y stage 126 moved in the Y axis direction and the Y stage 126 is disposed on the upper side of the X stage 121 As shown in FIG. The X stage 121 is reciprocally moved along the X axis by the X stage driving unit on the base frame 103 and the Y axis stage 126 is moved along the Y axis direction by the Y stage driving unit on the X stage 121 And is reciprocated.

The X stage driving unit for driving the X stage 121 includes a linear motor 122 and an LM (Linear Motion) guide 123 extending along the X axis to guide the reciprocating movement of the X stage 121 This is because the marks for guide holes 23 of the circuit board 20 are formed by the detection unit 150 which is transferred in the X-axis direction intersecting the transfer table 110 for transferring the circuit board 20 in the Y- So that the processing accuracy of the guide hole can be maximized.

The Y stage driving unit for driving the Y stage 126 may include the linear motor 122 like the X stage driving unit. However, as shown in FIG. 6, the Y stage 126 may include ball screws 127 And a LM guide 129 extending along the Y axis to guide the reciprocating movement of the Y stage 126. The LM guide 129 may be provided to guide the ball screw 127 in the normal direction.

The X stage driving unit and the Y stage driving unit are controlled by a control panel 104 that controls the entire drilling unit 100. The control panel 104 receives information on the detection marks 23 for the guide holes from the detection units 150 mounted on the XY stage 120 and moved in the X axis, The drill units 130 mounted on the XY stage 120 are moved to the marks 23 for the guide holes to control the XY stages 120 so that the guide holes can be drilled in the guide holes.

6 to 8, the drill units 130 are mounted on the Y stage 126 (see FIG. 6) so as to be reciprocally movable in the X and Y axes between the XY stages 120 and the transfer table 110, Respectively.

A drill 131 is mounted on each of the drill units 130 so as to be capable of drilling a guide hole with respect to the guide hole 23 of the circuit board 20 and a rotatable spindle 132 is provided. The spindle 132 may be rotatable by a conventional rotary motor.

As shown in FIGS. 10 and 11, the drill units 130 move to the guide hole 23 and then move up to the original position after machining the guide holes while moving upward. So that it can be raised and lowered in the Z-axis direction by the lifting and lowering driving unit 141.

The lifting and lowering drive unit 141 for lifting and lowering the drill units 130 includes a rotary motor 142, a drive pulley 143 provided on the rotary shaft of the rotary motor 142, a driven pulley 143 separated from the drive pulley 143, A belt 145 that transmits power from the drive pulley 143 to the driven pulley 144, a ball screw 146 that is fixed to the rotational center of the driven pulley 144 and extends vertically, And an elevating member 147 that can be raised and lowered in a screwed manner with the elevating member 146. The elevating member 147 is installed so as to be slidably supported on the vertical bracket 133 for fixing the drill units 130 to the Y stage 126.

Further, it is preferable that the drill units 130 are provided with a lower discharge means for sucking the generated cutting debris around the spindle 132 after the guide holes are formed in the guide hole marks 23, .

Here, the lower discharging means may include a debris receiver formed to surround the spindle 132 so as to receive cutting debris, and a conventional suction pump for sucking and discharging the debris by generating negative pressure in the debris receiver .

These drill units 130 are provided in two pairs in this embodiment, and are arranged in pairs on two Y stages 126 located on both the left and right sides.

The pair of drill units 130 arranged for each Y stage 126 are arranged in the Y-axis direction. A pair of drill units 130 arranged for each Y stage 126 are disposed on the respective drills 130 so that the movement trajectory of the drill units 130 can be minimized when the left and right gaps between the guide holes to be processed are the same. (131) are disposed on the same Y-axis line.

When a pair of drill units 130 are provided for each of the Y stages 126 so that two kinds of guide holes having different diameters along the X axis are drilled in the circuit board 20, The diameter of the reference hole with respect to the mark 23a for the etched hole or the mark 23c for the directional hole and the diameter of the reference hole with respect to the direction If the hole or etch hole is machined differently, the two types of drills can be mounted one at a time.

In a state where the two types of drills are mounted, as shown in FIGS. 10 and 11, the drill units 130 can sequentially penetrate the guide holes. Accordingly, since it is not necessary to replace the drill to process the remainder after first machining any one of the reference hole, the etching hole, and the directional hole as in the conventional art, it is possible to shorten the working time and improve the productivity.

The detection unit 150 detects the positions of the guide-hole marks 23 on the circuit board 20. The detection unit 150 is disposed on the circuit board 20 so as to correspond to the XY stages 120 described above. 5, in the case where the marks 23 for the guide holes formed on the insulating substrate 21 are covered with the conductive layer 22 in the circuit board 20 as shown in FIG. 5, An X-ray generator 151 and a vision device 156 so as to be able to take a picture of the marks 23 and detect the position thereof.

Here, the X-ray generator 151 is for emitting the X-rays to the circuit board 20 and viewing the marks 23 for the guide holes. The X-ray generator 151 is disposed above the transfer table 110, And is fixedly connected to the stage 121 by a fixing bracket 152.

Here, the vision device 156 is for capturing an image viewed by the above-described X-ray generator 151, and is disposed below the transfer table 110, and moves along with the X-ray generator 151 in the X- And is fixed to the Y stage 126 so as to move independently of the X-ray generator 151 in the Y-axis direction. When the vision device 156 is moved together with the X-ray generator 151 in the X-axis direction, the relative positional error between the vision device 156 and the X-ray generator 151 can be minimized, can do.

A pair of drill units 130 provided on one XY stage 120 together with the vision device 156 detects the mark 23 for the guide hole by the vision device 156, It is preferable that the center of shooting of the vision device 156 and each drill center of the drill units 130 are arranged on the same line in the Y-axis direction so that the movement locus can be minimized.

The vision device 156 is further provided with a lens barrel 157 for guiding the X-ray to the circuit board 20 between the X-ray generator 151 and the circuit board 20 when detecting the guide-hole mark 23 , The barrel 157 is connected to the Y stage 126 by the connection bracket 158 and is arranged to correspond to the photographing center of the vision device 156.

Since the barrel 157 is moved along the X-axis and Y-axis together with the vision device 156 as it is connected to the Y-stage 126, the barrel 157 is moved together with the vision device 156 The drill unit 130 moves to the guide hole mark 23 for drilling two kinds of guide holes in the guide hole 23 as shown in FIG. 10 or 11 Not only the vision device 156 but also the barrel 157 are deviated from the guide-hole mark 23 and the X-ray generator 151.

In this case, since the X-ray emitting portion of the X-ray generator 151 is opened, the X-ray emitting portion needs to be closed to prevent leakage of the X-ray. The drill unit 130 is positioned below the X-ray generator 151 so as to correspond to the mark 23 for the guide hole, and then the guide hole is machined. When the guide hole is pierced by the drill unit 130, 20 are preferably fixed, the X-ray generator 151 is provided with a drilling clamp 161.

The drilling clamp 161 reciprocates in the X and Z axis directions by the clamp driving unit so that the drilling clamp 161 is displaced from the region where the X-ray is emitted when the lens barrel 157 is located at the portion where the X- When the drill unit 130 is moved to drill a guide hole in the guide hole mark 23, it moves in a direction to close the part where the X-ray is emitted, and fixes the circuit board 20 in the process of opening the guide hole .

The drilling clamp 161 can be installed to move reciprocally in the X and Z axis directions under the guidance of the LM guide 163 to the fixing bracket 152 supporting the X-ray generator 151. The clamp driving unit for driving the drilling clamp 161 may include air cylinders 162 reciprocating in the X and Z axes, respectively.

Further, it is preferable that an upper side discharging means is provided below the drilling clamp 161 for sucking the generated chip debris as a guide hole is formed in the guide hole mark 23 and discharging it to the outside. Here, the upper discharging means may include a recess formed in the lower surface of the drilling clamp 161 to receive the cutting debris, and a suction pump for sucking and discharging the cutting debris by generating a negative pressure in the groove.

With the drilling clamp 161 in this way, the Z-axis can be elevated above the center frame 101 so that the central portion of the circuit board 20 can be fixed when the guide holes are drilled in the guide- It is preferable that the center clamp 171 is provided.

Here, as means for lifting the central clamp 171, an air cylinder or the like may be used. The one end of the drilling clamp 161 can be elevated and lowered in the Z-axis direction so that the edge of the circuit board 20 can be prevented from being lifted while the circuit board 20 is fixed by the central clamp 171. [ It is also possible that the auxiliary clamp 165 is further provided. Here, it is preferable that the auxiliary clamp 165 is provided so as to be able to move up and down together when the drilling clamp 161 ascends and descends.

A process of forming guide holes in five guide hole marks 23 provided on the circuit board 20 as shown in FIG. 5 by the drilling machine 100 constructed as described above will be schematically described below.

First, when the operator places the circuit board 20 on the upper surface of the transfer table 110, the circuit board 20 is fixed to the transfer table 110 by the sucking means 112. When the transfer table 110 is transferred in a state where the circuit board 20 is fixed, the circuit board 20 is gradually transferred in the Y direction.

When the circuit board 20 is gradually transferred in the Y direction and the pair of detection units 150 located on both the left and right sides are moved in the X direction so as to cross the transfer direction of the transfer table 110, And the marks 23 for the guide holes of the substrate 20 are scanned.

At this time, the X-rays are emitted from the X-ray generators 151 of the detection units 150 and the emitted X-rays are supplied to the circuit board 20 via the lens barrel 157, When viewed, the projected image is photographed by the vision device 156 and then provided to the control panel 104.

When the positions of the marks for the two guide holes located in the first row are detected in the process of scanning the marks 23 for guide holes, the transfer table 110 is stopped and the pair of the vision devices 156, One of the drill units 130 on the right side and one of the pair of drill units 130 located on the right side are respectively moved and positioned correspondingly to the detected marks for two guide holes.

Then, the drilling clamps 161 are positioned at respective portions of the X-ray generators 151 where the X-rays are emitted, while the circuit board 20 is fixedly positioned. In this state, when each of the drill units 130 located in the detected two guide hole marks rises and the drill 131 rotates, the guide holes are drilled and machined, respectively.

After the guide holes are formed in the two guide holes for the first row, the drill unit 130 is lowered while the drilling clamps 161 are removed. Thereafter, the process of detecting the marks for the remaining guide holes and drilling the guide holes are sequentially performed through the process described above.

On the other hand, the diameter of the reference hole and the diameter of the directional hole or the etching hole are different from the diameter of the reference hole for the reference hole 23a and the mark 23b for the etching hole or the mark 23c for the directional hole, Two types of drills may be separately mounted on a pair of drill units 130 located on the left side and two types of drills may be divided into a pair of drill units 130 located on the right side, I will install it.

In this state, if the above-described process is performed while positioning each of the drill units 130 according to the application, the two types of guide holes can be rapidly processed without replacing the drill.

FIG. 12 is a front view showing that the entry sheet feeding means is installed in the drilling machine of FIG. 7, and FIG. 13 is an enlarged view showing the uncoiler, the feeding portion, and the lift portion in the entry sheet feeding means of FIG.

FIG. 14 is a side view showing the uncoiler in FIG. 13, FIG. 15 is a side view showing the feeding part in FIG. 13, and FIG. 16 is a side view showing the elevating part in FIG.

In addition, Figure 17 is a schematic diagram showing that the drill is located in the drill hole beneath the drilling clamp through the circuit board and the entry sheet.

For reference, the components of the drilling unit 100 may be installed in the main frame 190 in an appropriate arrangement and structure.

The entry sheet feeding means 200 of the present invention is provided with an entry sheet 30 between the drilling clamp 161 and the circuit board 20 in order to prevent burrs and damage on the edges of the guide holes during drilling. .

The entry sheet 30 is a sheet that covers the circuit board 20 during the drilling operation of the circuit board 20 and can be mainly used with an aluminum foil of 0.1 mm to 0.15 mm, It is needless to say that materials of various materials capable of performing the same functions as those described above can be utilized.

The entry sheet 30 mitigates the impact on the drill bit and prevents the occurrence of burrs. It also absorbs the heat generated during the drilling operation to extend the life of the drill bit and suppress the increase in the temperature of the inner wall of the hole to be processed, thereby reducing the occurrence of smear.

A drilling clamp (not shown) for supporting the upper surface of the circuit board 20 after the drill 131 passes through the circuit board 20 at the time of drilling 161 to a certain extent.

A drill hole 161d is formed under the drilling clamp 161. Such a drilling process is repeated so that the diameter of the drill hole 161d is gradually increased by the drill 131 due to the work vibration, The lower pressing structure of the drilling clamp 161 with respect to the rim of the circuit board 20 is released to cause burrs on the rim of the circuit board 20. [

At this time, the entry sheet 30 can be disposed between the circuit board 20 and the upper drilling clamp 161 to prevent the occurrence of burrs.

That is, the drilling hole 161d is formed in the drilling clamp 161 due to the initial drilling. Since a space in which the drilling hole of the circuit board 20 can occur due to the drill hole 161d is generated, The entry sheet 30 is disposed between the upper surface of the circuit board 20 and the drill hole 161d in order to eliminate the space where burrs can occur.

As a result, burrs are prevented from being generated in the circuit board 20, and the quality of the circuit board 20 can be enhanced. Further, by extending the service life of the drilling clamp 161, It is possible to prevent waste of time and deterioration of productivity caused thereby.

Further, the entry sheet 30 also functions to suppress a temperature rise of the drill 131 itself.

The clamping body 161 may include a clamp body 161a and a clamp pad 161c attached to the lower portion of the clamp body 161a. The clamp body 161a is connected to the vacuum intake line 170 are connected to each other.

Therefore, the drill hole 161d is formed when the clamp pad 161 is drilled when drilling by the drill 131, so that the drill hole 161d is communicated with the intake hole 161b. As a result, a scrap or the like May be discharged through the vacuum intake line 170 through the drill hole 161d and the intake hole 161b.

At this time, although the vacuum suction line 170 is not shown in detail, a vacuum tube is extended from the suction hole 161b to the outside, and a vacuum pump or the like is installed in the vacuum tube to discharge the foreign matter smoothly to the outside It is of course possible to take a structure.

The entry sheet feeding means 200 for feeding the entry sheet 30 performing the function as described above includes a feed frame 210 connected to the drilling means 100, An uncoiler 221 and a coiler 222 provided on both sides of the drilling unit 100 and a feeding unit 230 provided at a rear end of the uncoiler 221 in the feed frame 210 .

Here, the supply frame 210 may be installed in connection with the drilling means 100, and may be fixed to the main frame in which the drilling means 100 is installed as a whole.

The uncoiler 221 and the coiler 222 may be provided on both sides of the drilling means 100 in the supply frame 210 to uncoil and coil the entry sheet 30 have.

Specifically, the uncoiler 221 and the coil 222 are preferably rotationally driven by the torque motor 223 so as to rotate while maintaining the tension of the entry sheet 30. That is, the uncoiler 221 and the coil 222 are configured to pull the entry sheet 30 with a certain force by the torque motor 223, respectively, so that the entry sheet 30 is not slackened.

The feeding part 230 is provided at the rear end of the uncoiler 221 in the feeding frame 210 so that the feeding part 230 is not used in the entry sheet 30 between the drilling clamp 161 and the circuit board 20 after drilling. And moves the entry sheet 30 to the coil 222 side so that a non-perforated portion is positioned.

The feeding section 230 includes a push roller 231, a push cylinder member 232 for moving the push roller 231 up and down, a drive roller 233 disposed below the push roller 231, And a servo motor 234 for rotating the roller 233.

At this time, the push roller 231 is configured to rotate while pushing down the uncoiled entry sheet 30 from the uncoiler 221.

The push cylinder member 232 is connected to the push roller 231 so as to move up and down the push roller 231. The pushing roller 231 is connected to the push cylinder member 232 by a link member 235. The link member 235 is supported by the push cylinder member 232 so as to be stably guided at the time of ascending and descending, Can be fastened to guide structure 236. The guide structure 236 may be an LM guide and a rail structure as an example.

The drive roller 233 is disposed below the push roller 231 in the supply frame 210 and rotates to move the entry sheet 30 to the coil 222 side. Is provided by motor 234.

The elevator 240 is configured to raise and lower the entry sheet 30 such that the entry sheet 30 is spaced apart from the circuit board 20 when the entry sheet 30 is moved.

The entry sheet 30 is moved a distance to the coiler 222 side after the drilling operation is completed so that a new unthreaded portion is located between the circuit board 20 and the drilling clamp 161 during the next drilling operation, The upper side is raised to a certain degree in order to avoid friction with the substrate 20, and then moves to the coiler 222 side.

After the entry sheet 30 is lifted up, the elevating unit 240 descends after the entry sheet 30 is moved. The elevating unit 240 is installed at the rear end of the feeding unit 230 and at the front end of the coiler 222, .

Specifically, the elevating unit 240 may include a supporting roller 241 for supporting the lower surface of the entry sheet 30 upward, and a lifting cylinder member 242 for lifting and lowering the supporting roller 241 .

The lifting and lowering cylinder member 242 is connected to the support roller 241 to raise and lower the support roller 241. The lifting cylinder member 242 is connected to the support frame 241 by a link member 243, The guide frame 243 can be fastened to the feed frame 210 by the guide structure 244 so that the guide frame 243 can be stably guided by the lifting cylinder member 242. The guide structure 244 may be an LM guide and a rail structure as an example.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

20: circuit board 22: conductive layer
23: Mark for guide hole 23a: Mark for reference hole
23b: Mark for etching hole 23c: Mark for direction hole
30: entry sheet
100: Drilling means 101: Central frame
102: reference plate 103: base frame
104: Control panel 110a:
111: Linear motor 112: Suction means
120: XY stage 121: X stage
122: Linear motor 126: Y stage
127: Ball screw 128: Rotary motor
129: LM Guide 130: Drill Unit
131: Drill 132: Spindle
133: vertical bracket 141:
142: rotation motor 143: drive pulley
144: driven pulley 145: belt
146: ball screw 147: lift member
150: Detection unit 151: X-ray generator
152: Fixing bracket 156: Vision equipment
157: barrel 161: drilling clamp
161a: Clamp body 161b: Intake hole
161c: Clamp pad 161d: Drill hole
170: Vacuum suction line 162: Air cylinder
163: LM Guide 165: Auxiliary clamp
180: exhaust unit 181: adsorption pad
182: driving part 190: main frame
200: entry sheet feeding means 210: feeding frame
221: Uncoiler 222: Coiler
223: Torque motor 230: Feeding part
231: push roller 232: push cylinder member
233: Drive roller 234: Servo motor
235: link member 236: guide structure
240: lift portion 241: support roller
242: lifting cylinder member 243: link member
244: Guide structure

Claims (20)

Drilling means configured to drill the circuit board by a drill to form a guide hole, and to support the circuit board with a drilling clamp at a position corresponding to the drill with the circuit board interposed therebetween; And
An entry sheet feeding means for feeding an entry sheet between the drilling clamp and the circuit board so as to prevent burrs and damage from occurring at the edges of the guide holes when drilling;
And a drilling machine for drilling the multilayer printed circuit board.
The method according to claim 1,
Wherein the entry sheet feeding means comprises:
A supply frame coupled to the drilling means;
An uncoiler and a coiler installed on both sides of the drilling means in the supply frame for uncoiling and coiling the entry sheet; And
A feeder installed at a rear end of the uncoiler in the feed frame to move the entry sheet to the coiler side so that the drilled portion of the entry sheet is positioned between the drilling clamp and the circuit board after drilling;
And a drilling machine for drilling the multilayer printed circuit board.
3. The method of claim 2,
The feeding unit includes:
A push roller which rotates while pressing down the entry sheet uncoiled from the uncoiler;
A push cylinder member installed in the supply frame and associated with the push roller to move the push roller up and down;
A drive roller disposed below the push roller in the supply frame and rotated to move the entry sheet to the coiler side; And
A servo motor for providing a rotational driving force to the drive roller;
And a drilling machine for drilling the multilayer printed circuit board.
3. The method of claim 2,
Wherein the entry sheet feeding means comprises:
A lift unit installed at a rear end of the feeding unit and at a front end of the coiler in the feeding frame to raise and lower the entry sheet so that the entry sheet is spaced apart from the circuit board when moved;
The drilling machine further comprising:
5. The method of claim 4,
The elevating unit includes:
A supporting roller for supporting the lower surface of the entry sheet upward; And
An elevating cylinder member installed in the supply frame and associated with the supporting roller to elevate the supporting roller;
And a drilling machine for drilling the multilayer printed circuit board.
3. The method of claim 2,
The uncoiler and coiler may be,
Wherein the driving force of the driving motor is rotationally driven by the torque motor so as to rotate while maintaining the tension of the entry sheet.
The method according to claim 1,
Wherein the drilling clamp comprises:
A clamp body having an intake hole connected to a vacuum intake line; And
And a clamp pad attached to a lower portion of the clamp body, wherein when the drill is drilled, the clamp pad is drilled to form a drill hole communicating with the intake hole, And the air is discharged through the vacuum intake line through the intake hole.
8. The method according to any one of claims 1 to 7,
Wherein the drilling means comprises:
A transfer table installed on a central frame so that the circuit board for manufacturing a multilayer printed circuit board is supplied from one side and placed on an upper surface and horizontally transferred by the table driving unit along the Y axis direction;
A pair of XY stages arranged on the base frame so as to be spaced apart from each other below the transfer table and arranged on the same plane, and a Y stage arranged on the upper side of the X stage;
A pair of detection units arranged to correspond to the XY stages and capable of reciprocating in the X-axis direction, respectively, for detecting the positions of the guide hole marks on the circuit board; And
And a guide hole for guiding the XY stage and the XY stage, wherein the YY stage moves to the guide hole marks based on the information detected by the detection units, Two pairs of drill units arranged in pairs on the stages and arranged to be arranged in the Y-axis direction, and capable of being raised and lowered in the Z-axis by a lift driving part, the drill being mounted on a rotatable spindle;
And a drilling machine for drilling the multilayer printed circuit board.
9. The method of claim 8,
Wherein the detecting units include an X-ray generator for emitting an X-ray to the circuit board and looking at the marks for the guide hole so that the X-ray detecting unit can detect a position of the guide-hole marks when the marks for the guide- And a vision device for photographing an image viewed by the X-ray generator.
10. The method of claim 9,
The X-ray generators are respectively disposed above the transfer table and are fixed to the X stages one by one so as to be reciprocally limited in the X-axis direction, and the vision devices are respectively disposed below the transfer table, And the Y stages are separated and fixed to the Y stages so that they can reciprocate independently in the Y axis direction while reciprocally moving in the X axis direction together with the Y stages.
11. The method of claim 10,
Wherein the pair of drill units and one vision unit provided for each of the Y stages are arranged so that their centers are aligned on the same line in the Y-axis direction.
12. The method of claim 11,
The X-ray generators are located outside the region where the X-rays are emitted when detecting the marks for the guide holes, and close the X-ray emitting portions when the guide holes are drilled in the marks for the guide holes, Further comprising a plurality of drilling clamps respectively installed to be able to reciprocate in the X and Z axis directions by the clamp driving unit with respect to the circuit board so as to fix the circuit board when guide holes are formed in the multi- Drilling machines for printed circuit boards.
13. The method of claim 12,
Wherein the drilling clamp further comprises an upper discharging means for sucking and discharging the generated chip debris to the outside, the guide holes being formed in the guide hole marks at the lower side of the drilling clamp.
14. The method of claim 13,
And a barrel for guiding the X-ray to the circuit board between the X-ray generator and the circuit board when the marks for the guide hole are detected, respectively, are further connected to the vision apparatuses.
15. The method of claim 14,
The center frame further includes a center clamp which is movable up and down in the Z-axis direction so as to fix the central portion of the circuit board when the guide holes for the guide holes are formed in the upper side of the center frame, Wherein a plurality of auxiliary clamps are provided on one side of the drilling clamps so as to be able to move up and down in the Z-axis direction so as to prevent lifting of edges of the circuit board in a fixed state.
12. The method of claim 11,
Wherein the central frame is further provided with a reference plate that is capable of calculating and correcting the position error of the drill units and the X-ray generators based on the data taken from the vision devices. machine.
9. The method of claim 8,
Wherein the pair of drill units provided for each of the Y stages are capable of mounting two types of drills one by one when two types of guide holes having different diameters are drilled in the circuit board. machine.
9. The method of claim 8,
Wherein the table driving unit includes a linear motor.
9. The method of claim 8,
Wherein the transfer table further comprises suction means for sucking and fixing the circuit board to the transfer table.
9. The method of claim 8,
Wherein the drill units are further provided with lower discharge means for sucking the generated cutting debris around the spindle while guiding holes are formed in the guide hole marks, Drilling machines for boards.

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