JP4080181B2 - Processing device and printed circuit board processing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printed circuit board processing machine such as a printed circuit board drilling machine that processes holes in a printed circuit board and a printed circuit board external shape processing machine that processes the external shape of a printed circuit board, and a processing apparatus that processes a thin plate.
[0002]
[Prior art]
FIG. 3 is a perspective view of a conventional printed circuit board drilling machine, FIG. 4 is a front view showing the vicinity of the spindle of the printed circuit board drilling machine of FIG. 3, and FIG. 5 is a printed circuit board drilling machine of FIG. It is a top view of the table of a machine.
[0003]
In FIG. 3, the table 1 is supported by a guide (not shown) and is movable on the bed 20 in the X-axis direction. A cross rail 21 is fixed to the bed 20 so as to straddle the table 1. A guide 23 is provided on the front surface of the cross rail 21, and a cross slide 22 is supported on the guide 23. The cross slide 22 is movable in the Y-axis direction along the guide 23 by a motor 24. A guide 31 is provided on the front surface of the cross slide 22, and the base 30 is supported by the guide 31. The guide 31 can be moved in the Z-axis direction by a motor 32. A saddle 33 is fixed to the front surface of the base 30, and a spindle 40 is fixed to the saddle 33.
[0004]
As shown in FIG. 4, a drill 41 is rotatably held at the tip of the spindle 40. A pressure foot 42 fitted to the tip of the spindle 40 is supported so as to be movable in the Z-axis direction, and is urged downward in the figure by an air cylinder (not shown).
[0005]
A plurality of printed circuit boards 2a to be processed are stacked on the lower plate 2b and placed on the surface 1a of the table 1 in a state of being fixed integrally by two reference pins 3. Hereinafter, the printed board 2a and the lower plate 2b to be processed are collectively referred to as a printed board 2.
[0006]
As shown in FIG. 5, holes (here, notched shapes) 4 and 5 are formed on the surface side of the table 1. A square first clamp plate 7 is disposed in the hole 4 in which the V-shaped groove 6 is formed on one side surface. The length of the side in the X direction of the clamp plate 7 is substantially equal to the length of the side in the X axis direction of the hole 4, and the length of the side in the Y axis direction is the clamp of the first reference pin 3 a in contact with the groove 6. It is shorter than the length from the end portion (the right end in the figure) on the plate 7 arrangement side to the surface (the right side surface of the hole 4 in the figure) 4 b facing the groove 6.
[0007]
A square second clamp plate 8 is disposed in the square hole 5. The length of the side of the clamp plate 8 in the X-axis direction is substantially equal to the length of the side of the hole 5 in the X-axis direction, and the length of the side of the Y-axis direction is determined from the length of the side of the hole 5 in the Y-axis direction. It is shorter than the length obtained by subtracting the diameter of the second reference pin 3b. The first and second reference pins 3a and 3b have the same diameter. As shown in FIG. 4, the clamp plates 7 and 8 are straight lines composed of bearings 9 a and raceways 9 b arranged at the bottoms of the holes 4 and 5 so that the upper surfaces thereof are flush with the surface 1 a of the table 1. It is supported by the guide device 9 and is movable in the Y-axis direction by a driving means (not shown).
[0008]
Next, a processing procedure of the conventional printed circuit board drilling machine configured as described above will be described.
[0009]
First, as shown by solid lines in FIG. 5, by bringing the right side surfaces (hereinafter referred to as right side surfaces) 7 b and 8 b of the clamp plates 7 and 8 into contact with the inner side surfaces 4 b and 5 b of the holes 4 and 5, The distance between the left side surface (hereinafter referred to as the left side surface) 7a, 8a and the left inner side surface 5a of the groove 6 and the hole 5 is maximized. Next, after placing the printed circuit board 2 on the table 1, the clamp plates 7 and 8 are moved to the left in the figure, and the first reference pin 3a is placed in the groove 6 and the second reference pin 3b is placed on the right side. 8a is contacted. Then, the printed circuit board 2 is positioned in the Y-axis direction with the line O connecting the centers of the two reference pins 3 a and 3 b parallel to the X-axis, and is positioned in the X-axis direction by the groove 6.
[0010]
In this state, the table 1 is moved in the X-axis direction and the cross slide 22 is moved in the Y-axis direction, and the drill 41 is positioned at the processing portion of the printed circuit board 2. Then, the base 30 is moved in the Z-axis direction, the drill 41 is cut into the printed circuit board 2 while the printed circuit board 2 is pressed by the pressure foot 42, and a drilling process is performed on the printed circuit board 2.
[0011]
[Problems to be solved by the invention]
By the way, in the printed circuit board drilling machine configured as described above, when the clamp plate 8 is moved as shown in FIG. 6A, the right side surface 8b of the clamp plate 8 and the right inner side surface 5b of the hole 5 are moved. A gap 10 having a distance L is formed between them. FIG. 6A is a diagram showing a state when drilling is performed on the printed circuit board. When there is a processed portion on the gap 10 as described above, the printed circuit board 2 is bent by the pressing force or cutting force of the pressure foot 41 and sinks into the gap 10 as can be seen from FIG. For this reason, even if the drill 41 is cut to a predetermined depth, the depth of the hole 11 processed at the portion where the gap of the table 1 has no gap, as shown in FIG. As shown in FIG. 5C, the drill 41 may be broken during processing, or the axis of the processed hole 12 may be inclined.
[0012]
Therefore, conventionally, the lower plate 2b having a large plate thickness is employed to increase the rigidity of the printed board 2, thereby preventing the printed board 2 from being bent in the gap 10.
[0013]
However, if the lower plate 2b having such a large thickness is employed and subjected to drilling, the lower plate 2b used once must be discarded, which increases the running cost. Had to be expensive.
[0014]
The present invention has been made in view of such points, and an object of the present invention is to provide a processing apparatus and a printed circuit board processing machine capable of processing at high cost with high processing accuracy.
[0015]
[Means for Solving the Problems]
In order to achieve the object, the first means provides a substantially square opening in a table on which the workpiece is placed, inserts a reference pin provided in the workpiece, and the opening in the processing apparatus for processing the workpiece to position the reference pin to preset the inner surface of a first moving member for the positioning against the reference pin into said side, front Symbol first A second moving member disposed in a space formed between the moving member and an inner surface facing the preset inner surface of the opening, and the second moving member Means for moving in conjunction with movement of the moving member, wherein the means for moving in conjunction moves the second moving member in a direction to move away from the first moving member, and the first with respect to the first moving member 2 moving member Consists of a means for regulating between distance, said second moving member, characterized in that it moves in conjunction with movement of the first moving member from being restricted to the separated position by means of the regulating .
[0017]
In the embodiment described later, the first moving member is the clamp plate 8, the second moving member is the sub-plate 15, the biasing means is the spring 18, and the regulating means is the stopper 17. The extended members correspond to the support portions 16 each having a stopper 17 formed at the tip.
[0018]
In order to achieve the above object, the second means includes a table provided with a substantially square hole on the mounting surface on which the printed circuit board is mounted, and the hole is disposed in the hole, and the long side has a length of the hole. A first plate having a length substantially equal to the length of the long side and movable in the short side direction when a reference pin fixed to the printed circuit board is engaged with the reference pin. A printed circuit board processing machine, wherein the reference pin is positioned by being sandwiched between one side surface of the hole and one side surface of the first plate by moving the first plate The length of the long side is substantially equal to the length of the long side of the hole, and the length of the short side is a length obtained by subtracting the sum of the length of the plate and the diameter of the reference pin from the length of the short side of the hole. A second plate having a shorter length than the other side of the hole and the other side of the plate And the second plate is moved between the other side surface of the hole and the other side surface of the first plate when the positioning of the reference pin is performed by moving the first plate. And means for positioning the second plate so as to be located in the middle.
[0019]
In the embodiment described later, the first plate is the clamp plate 8, the second plate is the sub-plate 15, and the second plate is the other side of the hole and the other side of the plate. The means for supporting between the spring 18 and the stopper 17 is the means for positioning so that the second plate is positioned between the other side surface of the hole and the other side surface of the first plate. Each corresponds.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0021]
FIG. 1 is a plan view of a table according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1. The same reference numerals are assigned to the same parts as those in FIGS. The description is omitted.
[0022]
In FIG. 2, on the right end side of the clamp plate 8, a support portion 16 having a stopper 17 projecting upward at the end portion extends integrally from the clamp plate 8. On the support portion 16, a sub-plate 15 having a bowl-shaped cross section is supported so as to be movable in the Y-axis direction. The length of the side of the sub-plate 15 in the X-axis direction is substantially equal to the length of the side of the hole 5 in the X-axis direction, and the length of the side in the Y-axis direction is clamped from the length of the side of the hole 5 in the Y-axis direction. It is shorter than the length obtained by subtracting the sum of the length (thickness) of the side of the plate 8 in the Y-axis direction and the diameter of the second reference pin 3b, and the upper surface is the same as the surface 1a of the table. A plurality of springs 18 are arranged between the clamp plate 8 and the sub plate 15 and bias the sub plate 15 away from the clamp plate 8.
[0023]
Next, the operation of the present embodiment will be described.
[0024]
When placing the printed circuit board 2 on the table 1, the clamp plates 7 and 8 are moved to the right in the figure, and the left side surface 7 a and the groove 6 of the clamp plate 7, and the left side surface 8 a of the clamp plate 8 and the left side of the hole 5. The interval between the inner side surfaces 5a is maximized. When the printed circuit board 2 is placed on the table 1 and the clamp plates 7 and 8 are moved to the left in the figure, the sub-plate 15 is moved to the right in the figure by the spring 18 and comes into contact with the stopper 17 and stops. When the clamp plate 8 positions the second reference pin 3b, the interval 10a between the clamp plate 8 and the sub plate 15 and the interval 10b between the sub plate 15 and the right inner surface 5b of the hole 5 are substantially equal to each other. Become.
[0025]
That is, when the movement distance of the clamp plate 8 is set to L, which is the same as that in FIG. 5, the distances 10a and 10b are L / 2. As a result, the amount of bending of the printed circuit board 2 with respect to the pressing force of the pressure foot 42 or the cutting force of the drill 41 becomes approximately 1/8 of the conventional amount. Therefore, even if the thickness of the lower plate 2b is reduced, the printed board 2 hardly bends, and a hole having excellent straightness can be processed in the printed board 2.
[0026]
In this embodiment, the sub-plate 15 is provided only on the hole 5 side, but it can also be provided on the hole 4 side.
[0027]
Further, although the sub table 15 is held by the clamp plate 8, the sub table 15 may be arranged on the rear side surface 5 b of the hole 5 and urged in a direction approaching the clamp plate 8.
[0028]
Further, the present invention can be applied not only to a printed board drilling machine but also to a printed board outer shape processing machine that processes the outer shape of a printed board. Furthermore, the present invention can be applied not only to a printed circuit board but also to all processing apparatuses that perform predetermined processing on a thin plate with a tool.
[0029]
【The invention's effect】
As described above, according to the present invention, since the area of the space portion under the tool can be reduced when performing the positioned machining, it becomes possible to eliminate the influence of the space portion, and the machining accuracy is improved. It is possible to provide a processing apparatus that is high and can be processed at low cost. Moreover, since the thickness of the lower plate can be reduced, it is possible to provide a printed circuit board processing machine that has high processing accuracy and can be processed at low cost.
[Brief description of the drawings]
FIG. 1 is a plan view of a table according to the present invention.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
FIG. 3 is a perspective view of a printed circuit board drilling machine.
FIG. 4 is a front sectional view of the vicinity of a conventional spindle.
FIG. 5 is a plan view of a conventional table.
FIG. 6 is a diagram for explaining a problem of a conventional technique.
[Explanation of symbols]
2 Printed circuit board 3a First reference pin 3b Second reference pin 5 Hole 5a Left inner side surface 5b Right inner side surface 8 Clamp plate 8a Left side surface 8b Right side surface 15 Subplate 16 Supporting portion 17 Stopper 18 Spring

Claims (3)

A table on which the workpiece is placed is provided with a substantially rectangular opening, a reference pin provided on the workpiece is inserted into the opening, and the reference pin is positioned on a preset inner surface of the opening. In a processing apparatus for processing the workpiece,
A first moving member that performs the positioning by pressing the reference pin against the inner surface;
A second moving member disposed in a space portion formed between the front Symbol first moving member and the preset inner surface facing the inner surface of the opening,
Means for moving the second moving member in conjunction with movement of the first moving member;
With
The means for moving in conjunction with each other includes a means for biasing the second moving member in a direction away from the first moving member, and a separation distance of the second moving member from the first moving member. The processing apparatus comprising: a regulating means, wherein the second moving member moves in conjunction with the movement of the first moving member after the separation position is regulated by the regulating means . The processing apparatus according to claim 1, wherein the regulating means is a member extending from the first moving member . A table provided with a substantially square hole on the mounting surface on which the printed circuit board is placed, and the long side length is substantially equal to the long side length of the hole, and the short side length is arranged in the hole. A first plate having a length movable in a short side direction when a reference pin fixed to the printed circuit board is engaged with the hole, and the hole is moved by moving the first plate. In the printed circuit board processing machine, wherein the reference pin is positioned by being sandwiched between one side surface of the first plate and one side surface of the first plate,
The length of the long side is substantially equal to the length of the long side of the hole, and the length of the short side is obtained by subtracting the sum of the length of the plate and the diameter of the reference pin from the length of the short side of the hole. Means for supporting a short second plate between the other side of the hole and the other side of the plate;
When the positioning of the reference pin is performed by moving the first plate, the second plate is positioned between the other side surface of the hole and the other side surface of the first plate. Means for positioning the second plate;
Printed board machining apparatus, characterized in that it comprises.

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