JP3165820B2 - Method and apparatus for cutting circuit board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for cutting a circuit board into individual circuit units after mounting a plurality of electronic parts on a large-area circuit board formed on a single circuit board. The present invention relates to a circuit board cutting method and apparatus to be applied.

[0002]

2. Description of the Related Art Generally, in order to increase the productivity of a circuit assembly, a plurality of circuit boards are formed on a single large-area circuit board, and predetermined electronic components are mounted thereon to form a circuit. Is cut into individual circuit units to produce a circuit assembly.

Conventionally, in manufacturing this circuit assembly, a circuit board in which a V-groove serving as a reference line for division is provided in advance on a plate surface by a pair of upper and lower rotary cutters is used. After mounting the electronic components, V
By cutting along the groove, it is divided into each circuit unit.

However, in this case, it is difficult to align each cutting edge of the rotary cutter with the V-groove when cutting the circuit board after component mounting by the push-off device, and stress is applied to the circuit board. There is a risk of adverse effects.

[0005]

SUMMARY OF THE INVENTION The present invention does not cause a positional shift of the cutter blade with respect to the V-groove or a circumferential speed shift of the cutter blade with respect to the feed speed of the circuit board, and does not apply mechanical stress to the circuit board. It is an object of the present invention to provide a method and an apparatus for cutting a circuit board which can be cut efficiently and smoothly.

[0006]

In the method for cutting a circuit board according to the first aspect of the present invention, while the circuit board is horizontally fed by the transport means, first, the circuit board is rotationally driven in a direction opposite to the feeding direction of the circuit board. A continuous linear V-groove is engraved on the front and back surfaces of the circuit board with a pair of upper and lower groove cutting cutters, and then a plurality of pairs of upper and lower pairs are driven to rotate in the forward direction of the circuit board in the feed direction. A V-groove cutting process for gradually increasing the V-groove cutting amount by a cutter is performed.

According to a second aspect of the present invention, there is provided an apparatus for cutting a circuit board, comprising: a conveying means for horizontally feeding the circuit board; A pair of upper and lower pairs of cutting cutters, which are driven to rotate in the forward direction with respect to the circuit board feed direction, with each cutting edge being positioned on an extension of the cutting edge of the groove cutting cutter. Prepared,
A continuous linear V-groove is engraved on the front and back surfaces of the circuit board with a groove cutter, and then the cutters are arranged as a cutting mechanism that gradually increases the cut amount of the V-groove with a plurality of sets of press cutters. It is configured.

[0008]

In the method and apparatus for cutting a circuit board according to the present invention, a continuous linear V-groove is engraved on the front and back surfaces of the circuit board by a pair of upper and lower groove cutters which are driven to rotate in a direction opposite to the feed direction of the circuit board. By doing so, a continuous linear V-groove required for subsequent cutting can be efficiently and reliably carved, and the V-groove is cut by a cutting cutter that is driven to rotate in the forward direction of the circuit board in the forward direction. Moreover, since the cutting amount is gradually increased with multiple sets of press cutters,
The circuit board can be cut efficiently without applying a large stress to the circuit board.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference to the accompanying drawings, the illustrated cutting apparatus is used for cutting a circuit board on which electronic components such as a glass epoxy board and a polyimide board are mounted. The circuit board is formed into a single sheet having a wide area from which a plurality of circuit assemblies can be taken, and electronic components constituting a predetermined circuit are mounted on the board surface in advance.

In the cutting apparatus, slits used to separate the board surface into individual circuit units by separate processing are provided in a direction perpendicular to the conveying direction of the circuit board. It is configured to perform a cutting process.

FIG. 1 schematically shows the entire cutting apparatus in a side view. The cutting apparatus includes an upper and lower pair of groove cutting cutters 2 on a feed path of a circuit board by a conveying means 1. . Are provided in plural sets.

The pair of the grooving cutter 2 and the pressing cutters 3, 4, 5, 6,... Is formed by the respective rotating shafts 20a, 20b and 30a, 30b, 40a, 40b, 50a, 50.
A plurality of circuit boards are arranged in parallel at predetermined intervals on the same axis as b, 60a, and 60b, so that the circuit boards are arranged so as to be cut at a plurality of locations in the uniaxial direction.

As the circuit board transfer means 1, an XY table having a chuck or the like which cantileverly clamps at one side parallel to the circuit board transfer direction is provided. Depending on the transporting means 1, the circuit board can be fed in one direction at a predetermined speed while keeping the board surface horizontal, and since the circuit board is cantilevered, no stress is given by holding the board. Thickness movement due to processing can be tolerated.

As the grooving cutter 2, a cutter having a circular saw-like blade shape in which the blade body is formed of a super-steel alloy and diamond is attached to the blade tip can be provided. The grooving cutter 2 is equipped to rotate using the same drive motor 21 as a driving force.

The drive motor 21 includes a gear box 22
Are connected to the rotation shafts 20a, 20b via gears 22a, 22b, 22c built in the motor.
The upper and lower pairs of groove cutting cutters 2 are provided so as to rotate by suspending the cutters 2b. The drive motor 21 is provided so that the groove cutting cutter 2 is rotated in the direction opposite to the feed direction of the circuit board by synchronizing the feed speed and the peripheral speed of the circuit board by the transfer means 1.

As shown in FIG. 2, a pair of upper and lower disk guides 24a and 24b are provided on the side of the grooving cutter 2 for pushing and supporting the circuit board in accordance with the grooving process. These disk guides 24a, 24b
Cylindrical bodies 25a, 25 through which the respective rotary shafts 20a, 20b are inserted.
It is fitted and arranged on the outer periphery of b and is equipped so as to be driven and idle according to the feed of the circuit board.

The grooving cutter 2 engraves V-grooves on the front and back surfaces of the circuit board. In order to collect chips generated by the V-groove processing, as shown in FIG.
The vacuum covers 27a and 27b provided with the inner cover 26b are accommodated and arranged.

The groove cutter 2 may be any cutter capable of engraving a V-groove by moving the thickness of the circuit board by volume.
An electrodeposited diamond cutter, a rosin diamond cutter, or the like can be used.

A pair of upper and lower cutters 3, 4, 5, 6,...
Is provided so that each cutting edge is aligned with an extension of the cutting edge of the grooving cutter 2 and has a predetermined cutting amount. Each of these pairs of press cutters 3, 4, 5, 6 ...
It is provided rotatably using the same drive motor 31 as power.

The drive motor 31 includes a gear box 32
The timing belts 33a, 33b,... Are connected via the gears 32a, 32b, 32c built in
0b, 40a, 40b, 50a, 50b, 60a, 60
b, each pair of press cutters 3,
Are connected to rotate at the same peripheral speed. The peripheral speeds of the press cutters 3, 4, 5, 6,... Are synchronized with the feed speed of the circuit board by the transport means 1, and the rotation direction is set so as to be all forward with the feed direction of the circuit board. I have.

Of the pairs of press cutters 3, 4, 5, 6,... Provided in a plurality of sets, the cutting edge is positioned at the center line of the blade as shown in FIG. A circular cutter is provided. In addition, the press cutter 3,
Nos. 4 and 5 are arranged so that the cutting edges are aligned with each other vertically and the cutting amount is gradually increased. The number of each pair of the cutting cutters 3, 4, 5 can be increased so that the number of cutting steps can be arbitrarily increased, so that the amount of cut per operation can be reduced.

As the push cutter 6 in the final stage, it is preferable to equip a circular cutter as shown in FIG. With this circular cutter, the cut surface of the circuit board can be trimmed to a flat surface, and the fiber protruding from the cut surface of a glass epoxy substrate or the like can also be cut off, so that a highly accurate cut surface can be finished.

Each pair of press cutters 3, 4, 5,
.. Represent the cutter holders 34a, 34b, 41a, 41b, 51 as shown in FIG. 6 so that the cutting depth can be set arbitrarily based on the center point in the substrate thickness.
a, 51b, 61a, and 61b are provided so as to be finely adjusted up and down. According to this, it is preferable because the worn blade can be reused after being polished again.

In the circuit board cutting apparatus thus constructed, when the circuit board is fed horizontally by the conveying means 1 to be sent between the pair of grooving cutters 2, the cutting edges 2 a and 2 b as shown in FIG. A continuous straight V-groove 11 is engraved on the front and back sides of the circuit board 10 from the edge of the circuit board.

The grooving is performed by a continuous linear V-groove 11.
Are engraved on the front and back surfaces of the circuit board 10 by a pair of upper and lower groove cutting cutters 2 that are driven to rotate in the direction opposite to the feed direction of the circuit board 10, so that the continuous linear V-grooves 11 required for subsequent cutting can be efficiently formed. Engraved reliably.

At the same time, the rotating shaft 2 of the grooving cutter 2
Disc guides 24 on both sides mounted on 0a, 20b
The circuit boards a and 24b are driven and idle in accordance with the feed of the circuit board to push and support the circuit board from above and below. For this reason,
The circuit board is restrained from vibrating and does not receive stress due to the vibration, and the disk guides 24a, 24b
There is no stress due to the deviation in peripheral speed.

Chips generated by the groove cutting process can be sucked and removed by vacuums 27a and 27b from the inside of the V groove or from the plate surface while preventing scattering by the electrostatic brushes 26a and 26b.

After the V-groove processing, a plurality of upper and lower pairs of press cutters 3, 4, 5, and 5 are provided on the circuit board 10.
In 6 ..., the V groove 11 is subsequently cut. Since this notch processing is performed in the same step as the V-groove processing, the cutting edges 3a and 3b can be accurately aligned without being displaced from the V-groove 11, as shown in FIG. Nothing.

Each pair of the press cutters 3, 4, 5, 6,... Is driven to rotate while synchronizing the feed speed and the peripheral speed of the circuit board, and cuts the V-grooves in the forward direction and the forward direction of the circuit board. In addition, the circuit board is driven to rotate, and the cutting is performed by gradually increasing the cutting amount, so that the circuit board can be efficiently cut without applying a large stress to the circuit board.

In the final stage of the press-cutting process, since the above-mentioned press-cutting cutter 6 of a circular cutter with which each cutting edge slides is provided, the cut surface of the circuit board 10 is shown in FIG.
As shown by, it is possible to cut accurately into a flat surface without protruding glass fiber or the like.

In the above-described grooving step, the circuit boards are pressed from above and below by the disk guides 24a and 24b so as not to vibrate.
.. Are positioned close to the grooving cutter 2 so that grooving and press-cutting can be performed simultaneously on the same circuit board.

When the cutting is completed, as shown in FIG. 1, as the transporting means 1 moves on the belt conveyor 7 arranged in front of the circuit board in the feeding direction, each of the boards cut in each circuit unit Is transferred onto the belt conveyor 7.

[0033]

As described above, according to the method and the apparatus for cutting a circuit board according to the present invention, the circuit board can be cut accurately without applying a mechanical stress to the circuit board, and can be mounted on a board surface in advance. It is possible to prevent adverse effects on electronic components.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram schematically showing a side view of a circuit board cutting apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing a partially cut front view of a groove cutter and a disk guide provided in the apparatus.

FIG. 3 is an explanatory view showing a groove cutting cutter provided in the apparatus in a housed state by a vacuum cover.

FIG. 4 is an explanatory diagram showing a partial front view of one of the push cutters provided in the apparatus.

FIG. 5 is an explanatory view showing another push cutter provided in the same apparatus in a partial front view.

FIG. 6 is an explanatory view showing a push cutter together with a holder provided in the apparatus.

FIG. 7 is an explanatory view showing a groove cutting state by a groove cutter of the apparatus.

FIG. 8 is an explanatory view showing a push-off state by a push-off cutter of the apparatus.

FIG. 9 is an explanatory view showing an end face of a substrate cut by a push cutter of the apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveying means of a circuit board 2 Upper and lower pair of groove cutting cutters 3, 4, 5, 6 Upper and lower pair of cutting cutters

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-115896 (JP, A) JP-A-62-201772 (JP, A) JP-A 1-164090 (JP, U) JP-A 4-164 125517 (JP, U) Japanese Utility Model Showa 58-150414 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B26D 3/00-3/06

Claims (2)

(57) [Claims] In the course of horizontally feeding a circuit board by a conveying means, first, a continuous straight V-shaped groove is formed on the front side of the circuit board by an upper and lower pair of groove cutters which are driven to rotate in a direction opposite to the feeding direction of the circuit board. Engraved on the back surface, and then cut the V-groove to gradually increase the cut amount of the V-groove with a plurality of upper and lower pairs of push cutters that are driven to rotate in the forward direction and the forward direction of the circuit board. A method for cutting a circuit board, comprising: 2. A transfer device for horizontally feeding a circuit board, and a pair of upper and lower groove cutters that are driven to rotate in a direction opposite to the feed direction of the circuit board in a feed path of the circuit board by the transfer device. Equipped with a plurality of pairs of upper and lower push cutters, each of which is positioned on an extension from the edge of the grooving cutter and is driven to rotate in the forward direction with respect to the circuit board feed direction,
After engraving continuous linear V-grooves on the front and back surfaces of the circuit board with a groove cutter, the cutters were arranged as a cutting mechanism for gradually increasing the cutting amount of the V-groove with a plurality of sets of push-off cutters. Characteristic circuit board cutting device.