JP2000326128A - Printed board working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide greater board holding force, supply a required quantity of air for drawing chippings into a pressure foot and work a board with an external shape of 20 mm square or less. SOLUTION: This printed board working machine includes a guide 30, a slider 31 held by the guide 30 and movable straight, a clamper 34 rotatable via a shaft 33, a cylinder 35 and a compression spring 38. The guide 30 is fixed to the side face of a body 22 so that the slider 31 may be moved in horizontal and the shaft 33 is fixed to the slider 31 so that the end 34a of the clamper 34 may be located near the axial center of the spindle 24 and moved in vertical. The slider 31 is energized toward the body 22 by the compression spring 38.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board processing machine for processing a printed circuit board while pressing the printed circuit board by a pressure foot disposed at a tip of a spindle.

[0002]

2. Description of the Related Art In the technique disclosed in Japanese Utility Model Publication No. 4-10992, a printed circuit board (hereinafter, referred to as a board) as a product is cut out from a large board (hereinafter, referred to as a mother board). While being pressed by an annular brush (pressure foot), chips generated from the processing portion are prevented from scattering around. Further, the space surrounded by the brush is connected to a duct, and the generated chips are sucked out together with the outside air supplied through the brush and eliminated to the outside. And
When separating the substrate from the mother substrate, both the mother substrate and the substrate are pressed by a brush and an annular rubber provided outside the brush and movable in a horizontal direction with respect to the brush,
The displacement of the substrate is prevented. However, it has been difficult to hold a substrate having a small external shape.

Therefore, in the technique disclosed in Japanese Utility Model Publication No. Hei 8-10480, a piston is disposed on the outer periphery of a spindle holding a cutter at the tip and is slidable in the axial direction of the spindle, and is supported by a lower end of the piston. A main body, an annular first brush (pressure foot) disposed at the lower end of the main body and slidable in the axial direction of the spindle and coaxial with the cutter; A guide member that is slidable on the guide member, and an annular second brush supported on the lower end of the guide member. An air hole is provided on a surface of the main body facing the guide member, and a part of the second brush is cut. A notch is provided so that the second brush is coaxial with the cutter when the piston is in the raised position and does not supply compressed air to the air hole, and is closed when the piston is in the lowered position and supplies compressed air to the air hole. The second and configured to be able to move beyond the outer periphery of the brush had to be able to suppress reliably even with a small substrate.

[0004]

[Problems to be solved by the invention]
Even in the case of the technique disclosed in Japanese Patent No. 0480, a circular pressing member for the substrate is used to prevent the surface of the substrate from being damaged and to supply air for sucking chips into the pressure foot. The use of such a brush did not increase the substrate holding force. Further, it was difficult to process a substrate having an outer shape of 20 mm square or less.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in the prior art, and to supply a large amount of air required for sucking chips to the inside of a pressure foot, which has a large board holding force, and has an external shape. An object of the present invention is to provide a printed circuit board processing machine capable of processing a substrate having a size of 20 mm square or less.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a table having a mounting surface on which a printed circuit board to be processed can be mounted, and a spindle on which a tool can be mounted at the tip. And a ring-shaped pressure foot disposed around the tip of the spindle.The table and the processing head are relatively moved and driven, and the printed board is pressed by the pressure foot. In the printed circuit board processing machine that performs processing with the tool, a clamper is provided on the processing head, and the clamper is supported so as to be movable with respect to the processing head in a direction along the mounting surface. Forming a pressing portion on the clamper, and facing the pressing portion inside the pressure foot to the processing head with respect to the processing head. Movably arranged direction, the pressing portion provided with a driving means for driving in a direction opposite to the mounting surface with respect to the spindle, characterized in that.

Further, the invention is characterized in that the clamper and the processing head are connected by spring means.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of a printed board processing machine according to the present invention. In FIG. 1, 1 is a bed. Reference numeral 2 denotes a pair of linear guide devices, which are fixed to the bed 1. A ball screw 3 is rotatably supported by the bed 1 and is driven by a motor (not shown). Reference numeral 4 denotes a table, which is supported on the linear guide devices 2 and 2 and has a nut (not shown). The nut is screwed to the ball screw 3. That is, the table 4 can be moved and driven in the front-back (X) direction by the ball screw 3. 5 is a mother board,
It is fixed on the table 4. 6 is a gate-shaped column,
Fixed to bed 1. Reference numeral 7 denotes a pair of linear guide devices, which are fixed to the side of the column 6. A ball screw 8 is rotatably supported on the side of the column 6 and is driven by a motor 9. Reference numeral 10 denotes a cross slide, which is supported by the linear guide devices 7 and 7 and has a nut (not shown). The nut is screwed to the ball screw 8. That is, the cross slide 10 can be moved and driven in the left-right (Y) direction by the ball screw 8. Reference numeral 11 denotes a pair of linear guide devices, which are fixed to the cross slide 10. 12 is a ball screw,
The motor 13 is rotatably supported by the cross slide 10.
Driven by 14 is a saddle, which is a linear guide device 1
A nut, not shown, supported by the nuts 1 and 11, is screwed to the ball screw 12. That is, the saddle 14 can be moved and driven in the vertical (Z) direction by the ball screw 12. A housing 15 is fixed to the saddle 14. Reference numeral 16 denotes an NC device that controls each unit according to a machining program input in advance.

2 and 3, the structure of the distal end portion of the housing 15 and the vicinity thereof will be described (in FIG. 1, the housing 15 and the vicinity thereof are simplified or omitted). FIG. 2 is a front sectional view of the tip end of the spindle, and FIG. 3 is a view as viewed in the direction of the arrow K in FIG. A pair of cylinders 21 is disposed outside the housing 15, and the cylinders 21 are fixed to the saddle 14. Reference numeral 22 denotes a main body, which is supported on the lower end side of the rods of the cylinders 21 and 21 and is movable and movable in the Z direction. Mother board 5 of main body 22
The opposite end 22a is formed in an annular shape as shown in FIG. Reference numeral 23 denotes a pressure foot, in which brushes are arranged in a ring shape, and are held by the main body 22. 24
Is a spindle, which is rotatably held by the housing 15. A cutter 25 is held at the tip of the spindle 24.

Reference numeral 30 denotes a guide, which is fixed to the main body 22 on the side facing the mother board 5. Reference numeral 31 denotes a slider which is held by a guide 30 via a rolling bearing 32 so as to be movable in a horizontal direction (Y direction in the illustrated case). 33 is a horizontal axis fixed to the slider 31. Numeral 34 denotes a clamper which is rotatable about a shaft 33 and whose tip 34a is arranged near the cutter 25. As shown in the figure, the distal end 34a is arranged near the cutter 25 but not to interfere with the cutter 25.
The annular pressure foot 23 is interrupted at the overlapping portion 23a intersecting the clamper 34 without a brush in order to avoid interference with the clamper 34. U-shaped groove 34 formed at the rear end of clamper 34
b is engaged with a shaft 36 provided on a cylinder rod 35a of the cylinder 35. The cylinder 35 is fixed to a seat 37 fixed to the slider 31. Reference numeral 38 denotes a compression spring, one end of which is supported by the main body 22 and the other end of which is supported by the seat 37, and biases the seat 37, that is, the slider 31, in a direction away from the main body 22. When the slider 31 is at the stroke end by the compression spring 38, the seat 37
The distance between the object and the main body 22 is G.

In FIG. 2, two mother substrates 5 are fixed to the table 4 via a lower plate 38 (a plate for preventing the table 4 from being damaged). 40
Is a substrate cut out from the mother substrate 5. Also, body 2
2 through a duct 42 shown in FIG.
It is connected to a dust collector not shown.

Next, the operation of this embodiment will be described. FIG. 4 is a diagram showing, in chronological order, processing paths when a rectangular substrate 40 is cut out from the mother substrate 5, and a path AB connecting points A and B, a path CD connecting points C and D are an X-axis. The path BC connecting the point B and the point C and the path DA connecting the point D and the point A are parallel to the Y axis. The cutter 25 is positioned at the point A in FIG. 5A, the saddle 14 is lowered, and the cutter 25 is cut into the mother board 5. Next, the main body 22 is lowered, and the mother board 5 is
To prevent the floating of The cylinder 35 urges the cylinder rod 35a downward, and the tip 34a is separated from the substrate 40 as shown by a two-dot chain line in the figure. In this state, the cutter 25 is moved in order from the point A to the paths AB, BC, and CD, and a few mm before the point A at which the substrate 40 on the path DA is separated from the mother substrate 5 as shown in FIG. At the point E (where the distance EA <G), the cylinder rod 35a is pulled up. Then, the tip 34a rotates counterclockwise in FIG. 2 and presses the point F of the substrate 40.

As shown in FIG. 4C, the cutter 25 further moves from the position E to a point A. On the other hand, the tip 34a stays at the point F due to the frictional force, and the seat 37, ie, the slider 3
1 is the main body 22 in the Y direction in the figure while compressing the compression spring 38.
Approach. The distance that the slider 31 can move in the Y direction with respect to the main body 22 is the distance G from the above-described configuration, and the distance E
Since A <G, when the cutter 25 is moved from the point E to the point A, the slider 31 is moved with respect to the main body 22, so that the clamper 34 does not shift with respect to the mother board 5. When the cutter 25 reaches the point A, the cylinder 35 is operated to separate the tip 34a from the substrate 40 and raise the saddle 14. Note that the amount of air passing through the brush 23 during the operation of the clamper 34 hardly changes.

As described above, in the present embodiment, the tip 34
Since a is holding the substrate 40 until the substrate 40 is separated, the substrate 40 does not move due to the cutting resistance at the end of the processing, and the substrate 40 is not damaged.

It is necessary to keep the processing path after the tip 34a presses the substrate 40 parallel to the moving direction of the slider 31, but since the processing path is known in advance, the tip 34a presses the substrate 40. The position of the point F can be easily determined.

The guide 30, the slider 31, the shaft 3
3. A plurality of sets of the clamper 34, the cylinder 35, the seat 37, and the compression spring 38 are provided. Can be

Further, the compression spring 38 is a tension spring,
The slider 31 may always be biased toward the main body 22 so that the slider 31 is kept away from the main body 22 when the clamper 34 operates.

[0018]

As described above, according to the present invention,
The small substrate in the pressure foot can be effectively pressed by the pressing portion of the clamper. That is, since the clamper is used, the substrate pressing force is large, and the amount of air necessary for sucking the chips is not prevented from being supplied to the inside of the pressure foot. When the present invention is applied, for example, the outer shape is 2
A substrate having a size of 0 mm square or less can be processed.

Further, when the spring means is provided, the clamper is immediately restored to the original position by the spring means after the holding of the substrate by the clamper is completed. This is advantageous because it is not necessary to control the position of the clamper.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a printed board processing machine according to the present invention.

FIG. 2 is a front sectional view of a spindle tip.

FIG. 3 is a view as seen from the arrow K in FIG. 2;

FIG. 4 is a plan view showing a processing path when processing a rectangular substrate.

[Explanation of symbols]

 22 body 24 spindle 30 guide 31 slider 33 shaft 34 clamper 34a tip 35 cylinder 38 compression spring

Claims (2)

[Claims] 1. A table having a mounting surface on which a printed circuit board to be processed can be mounted, a processing head having a spindle capable of mounting a tool at a tip thereof, and a spindle surrounding the tip of the spindle. A ring-shaped pressure foot, wherein the table and the processing head are relatively moved and driven, and the processing is performed by the tool while pressing the printed circuit board with the pressure foot. A head is provided with a clamper, the clamper is supported so as to be movable with respect to the processing head in a direction along the mounting surface, and a pressing portion is formed on the clamper, and the pressing portion is The pressure foot is disposed so as to be movable in a direction opposite to the mounting surface with respect to the processing head with respect to the processing head, and the pressing portion is configured to be the spindle A printed circuit board processing machine, further comprising: a driving unit for driving the device in a direction facing the mounting surface. 2. The printed circuit board processing machine according to claim 1, wherein said clamper and said processing head are connected by a spring means.