JPH01164590A - Printed wiring board cutter - Google Patents

Abstract

PURPOSE: To cut a printing wiring plate without adding any bending moment to a V-groove part so as to increase part mounting efficiency by providing a pair of circular rotary blades where the sections of tips are V-shaped, and the blade tips are arranged close to each other more than a thickness between the valley bottoms of cutting V-grooves formed in both surfaces of the printing wiring plate. CONSTITUTION: A pair of circular rotary blades 3 where the sections of blade tips are V-shaped and the blade tips are arranged close to each other more than a thickness between the valley bottoms of cutting V-grooves 2 formed in both surfaces of a printing wiring plate are rotated in opposing directions. By causing the V-grooves 2 of printing wiring plate 1 to face each other between the rotary blades 3, the printing wiring plate 1 is fed in by the rotation of the rotary blades 3, the tips of the rotary blades 3 enter the V-grooves 2 to make a deeper cut to an interval between the upper and lower blade tips, and the printing wiring plate is passed through the pair of rotary blades 3 and cut. Thus, without adding any bending moment to the V-groove part of the printing wiring plate and without breaking a mounted part item 8, the printing wiring plate 1 is cut by the pair of rotary blades 3.

Description

[Detailed Description of the Invention] [Summary] This invention relates to cutting processing of printed wiring boards used in electronic devices, and relates to a cutting device for printed wiring boards of various sizes provided on a fixed length board. The purpose of this device is to provide a device that cuts printed wiring boards using cutting grooves formed on both sides of the printed wiring board, and the cross section of the cutting edge is V-shaped and the thickness between the bottoms of the grooves is greater than the thickness between the grooves. The cutter is equipped with a pair of disc-shaped rotary blades whose cutting edges are arranged close to each other, and the printed wiring board is cut by moving the rotary blades so that a V-groove is exposed between them.

Further, the rotary blades may be rotated by power, or a plurality of pairs of the rotary blades may be arranged, and the spacing between the rotary blades in the direction of movement of the printed wiring board may be gradually narrowed and varied; , within the range defined by the above cutting groove,
The structure is such that the components are cut while still being mounted.

[Industrial application field]

The present invention relates to the cutting of printed wiring boards used in electronic devices, and relates to a cutting device for cutting printed wiring boards of various sizes provided on fixed-length substrates.

The printed wiring board mounting method, in which wiring is applied to the board by printing, components are mounted on the printed wiring board, and fixing and circuit connection are simultaneously performed by soldering, has become the most superior mounting method as well as the miniaturization of components. , used in all kinds of electronic equipment.

Recent printed wiring boards are required to have higher density packaging, and there is a trend toward multilayer wiring, finer wiring, and multi-terminal connections. There is a growing demand for further reductions.

[Prior Art] Fig. 3fa) shows a conventional printed wiring board cutting device (hand tool type), and Fig. 3('b) shows the same (upper and lower mold matching type).

The printed wiring board 1 is made by printing wiring in one or more places on a large standard-sized board, and after mounting the components, Vs are formed in advance on both sides of the board along the outer shape of the unit printed wiring board 1, facing each other.
Generally, a manufacturing method is adopted in which the printed wiring board 1 is obtained by dividing the printed wiring board 1 by the groove 2.

According to this method, the printed wiring board 1 has a uniform outer shape and a fixed length until the components are mounted, and the same automatic component mounting machine can be used. It is possible to efficiently create multiple .

As a conventional cutting device for dividing this board, as shown in FIG. Insert the outer circumferential part into the groove 92 and bend it to divide it.

Another type, as shown in FIG. It is placed on the optical end, and the upper die 93 is lowered on the upper surface so that the concave portion straddles the groove 2 to divide it.

[Problem that the invention seeks to solve]

However, (1) according to the hand tool 91, a margin of dimension A is always required on the end face of the printed wiring board 1 for insertion into the groove 92, which is wasted.

(2) Furthermore, when the printed wiring board 1 is bent, (2) the vicinity of the groove 2 is also bent to some extent, so there is a risk of damaging the mounted components 8 in the vicinity.

(2) When using the upper and lower molds 93 and 94, the width B of the concave shape of the upper mold 93 is required, so the mounting area for the mounted component 8 is narrowed.

There were problems such as.

The present invention has been made in view of these problems, and has the object of (1) providing an apparatus for cutting without applying bending moment to the groove portion.

[Means for solving problems]

The above problem is solved by the cutting grooves 2 formed on both sides of the printed wiring board 1, as shown in the principle diagram of FIG.
In a device for cutting, the cross section of the cutting edge is V-shaped, and the
It is equipped with a pair of disc-shaped rotary blades 3 in which the cutting edges are arranged closer together than the thickness between the bottoms of the grooves 2, and the printed wiring board 1 is cut by moving the V-groove 2 to face between the rotary blades 3. Further, the rotary blade 3 is rotated by power, and the rotary blade 3 is rotated by power.
The space between the rotary blades 3 in the direction of movement of the printed wiring board 1 may be gradually narrowed, or the mounting parts may be placed within the range defined by the cutting grooves 2. This problem is solved by the printed wiring board cutting apparatus of the present invention, which cuts the printed wiring board while the board is mounted.

[For production]

That is, if the groove (2) passes between the upper and lower rotary blades, the groove is further deepened by the cutting blade, leading to cutting, and the purpose is achieved.

As shown in the principle diagram in Figure 1, the rotary blade 3 has an acute-angled blade on the outer periphery.
If the upper and lower pairs of are rotated in opposite directions and the V-groove 2 of the printed wiring board 1 is exposed between the blades, the printed wiring board 1 is fed by the rotation of the rotary blade 3 and the cutting blade is inserted into the groove 2. The blade bites into the blade, and it cuts deeper into the space between the upper and lower cutting edges.

This amount of cutting may be done with a pair of rotary blades 3, but it is preferable that multiple pairs of rotary blades 3 are arranged in series, and all the rotary blades 3 are passed at the same circumferential speed in order, making a deep cut one after another. It is also possible to adjust and set the spacing between the upper and lower pairs of rotary blades 3, respectively, so as to allow the blades to fit together.

In this way, without applying any bending moment to the V-groove 2,
It can lead to amputation.

Further, since the rotary blade 3 is an acute-angled blade, it is a thin plate, and it is easy to make the radius larger than the mounting height of the mounted component 8. Therefore, it is possible to extend the mounting to the vicinity of the V-groove 2.

On the other hand, since the bending moment for the plate is proportional to the square of the plate thickness, if the depth of the groove 2 is deepened by half, for example, the bending moment will be reduced to A, so it will not cause cutting. It is also possible to allow a small bending moment during the division so that it hardly affects the mounted component 8 during bending and cutting.

〔Example〕

The present invention will be specifically described below with reference to embodiments shown in the drawings.

Like numbers refer to like objects throughout the design.

FIG. 2 shows a perspective view of an embodiment of the present invention.

In this embodiment, upper and lower pairs of rotary blades 3 are arranged in three places in series, and a carbide steel rotary blade 3 is concentrically tightened on one end of a metal frame 5 with an engineering cross section. Six rectangular parallelepiped metal blocks 6 are fixed vertically symmetrically, rotatably bearing a shaft to which a drive gear is fixed at the other end, and the upper three
The metal spacing plates 61 of different thicknesses are inserted and screwed together to adjust the spacing between the upper and lower pairs of rotary blades 3 on the printed wiring board.
is set to each predetermined value so as to sequentially narrow the first, second, and third areas that the area passes through in order.

The shaft of each block 6 protrudes from the other side of the frame 5, and by simply fixing the drive gear to this, it meshes with the geared drive motor 53 and each relay gear that have been installed and fixed on the same side in advance. , all of the disc blades 3 are rotated at the same circumferential speed and in opposite directions up and down.

Applying this example to a circuit unit with plug-in implementation,
, a glass epoxy multilayer printed wiring board 1 with a thickness of 6 mm, with an initial thickness of 0.5 tm left by the grooves 2, was cut to a thickness of about 0.1 mm using this device. can be easily divided with extremely weak force.

Furthermore, the internal dimension X of the rotary blade 3 is set to be 60 tm or more so that the board can be divided into a plurality of printed wiring boards 1, and the height of the mounted component 8 is 25 mm or less.

In addition, due to the thin plate of the rotary blade 3, the minimum distance between the mounted components 8 on both sides of the groove 2 of the printed wiring board 1 (8 dimensions in the conventional example)
The conventional limit of 6u was reduced to 2 cranes.

In addition, in order to prevent hands, fingers, etc. from touching the surroundings of the rotary blades 3, covers 51 and 52 are provided around each rotary blade 3 at the same surface position.
This is provided.

The above embodiment shows an example, and the mechanisms and dimensions of each part are not limited to those described above.

Further, the printed wiring board is not limited to a substrate, and can also be applied to cutting a large printed wiring board into small unit printed wiring boards.

〔Effect of the invention〕

As described above, according to the present invention, the outer shape of the printed wiring board is cut not by direct bending but by cutting, so that the mounting efficiency of components on the printed wiring board is increased, and there is no risk of damage to the mounted components during cutting. Moreover, the range of printed wiring boards to which the external shape processing process is standardized is increased, and manufacturing efficiency can be improved.

[Brief explanation of the drawing]

Fig. 1 is a principle diagram of the present invention, Fig. 2 is a perspective view of an embodiment of the present invention, in the figures, 1 is a printed wiring board, 2 is a groove, 3 is a rotary blade, 5 is a frame, and 6 is a block. ,
8 is a mounted component, 5L52 is a cover, 53 is a motor, 61 is a spacing plate, 91 is a hand tool, 9
2 is a groove, 93 is an upper die, and 94 is a lower die.

Claims (4)

[Claims] (1) V-grooves for cutting formed on both sides of the printed wiring board (2
) for cutting the printed wiring board (1),
A pair of disc-shaped rotary blades (3) each having a V-shaped cross section and arranged closer to each other than the thickness between the valley bottoms of the V groove (2), and a pair of disc-shaped rotary blades (3) having a V-shaped cross section and arranged closer to each other than the thickness between the bottoms of the V grooves (2), A printed wiring board cutting device characterized in that the printed wiring board (1) is cut by moving the printed wiring board (1) so as to expose the groove (2). (2) The printed wiring board cutting device according to claim 1, wherein the rotary blade (3) is rotated by power. (3) A plurality of pairs of the rotary blades (3) are arranged, and the interval between the rotary blades (3) in the moving direction of the printed wiring board (1) is
The printed wiring board cutting device according to claim 1, characterized in that the width of the printed wiring board is gradually narrowed. (4) The printed wiring board cutting device according to claim 1, wherein a mounted component (8) is mounted within a range defined by the cutting V-groove (2).