JP6163368B2 - Break tool for brittle material substrate - Google Patents

Description

  The present invention relates to a break tool for a brittle material substrate such as ceramic. In particular, the present invention relates to a simple-type break tool for manually performing a break operation of a brittle material substrate (hereinafter simply referred to as “substrate”) on which a scribe line (cut groove) is formed in the preceding step.

  Conventionally, a scribe line such as a cutter wheel (also referred to as a scribing wheel) or a laser beam is used to form a scribe line in the X direction and the Y direction orthogonal to each other on the surface of the substrate, and then the opposite side of the scribe line. A method of breaking a substrate on a unit substrate by applying an external force from a surface to bend or push-bend the substrate is known. For example, disclosed in Patent Document 1, Patent Document 2, Patent Document 3, and the like. Has been.

Various types of means for breaking the substrate along the scribe line are conventionally known.
FIG. 6 shows an example of a commonly used break method. As shown in FIG. 6A, a substrate W is placed on a horizontal table 20 with a cushion sheet 21 interposed therebetween. In this case, the surface of the substrate on which the scribe line S is formed is set on the lower side. Then, the break bar 22 is lowered from above the substrate W as shown in FIG. 6B, and the substrate W is bent to break the substrate W from the scribe line S (see FIG. 5 of Patent Document 1).

  FIG. 7 shows another breaking method. In this method, a pair of receiving blades 23 and 23 that receive the substrate W with the scribe line S interposed therebetween are arranged, and the break bar 24 is pressed against the substrate from the surface opposite to the surface on which the scribe line S is provided. Thus, the substrate W is bent to break the substrate from the scribe line S (see FIG. 3 of Patent Document 2).

  FIG. 8 shows still another breaking method. In this method, the substrate W is placed on the table 25 in a state where one end portion Wa to be divided of the substrate W protrudes outward from one end edge of the table 25. In this case, the scribe line S to be divided is made upward and coincides with the edge of the table 24. Then, the break bar 26 is lowered to push down the protruding portion Wa of the substrate W, and the substrate is broken from the scribe line S (see FIGS. 1 to 3 of Patent Document 3).

  In any of the above break methods, a holding means for holding the substrate on the table and a break bar that moves up and down in the vertical direction are indispensable. For this reason, a frame for holding the break bar so that it can be raised and lowered, a drive source for raising and lowering, and a suction mechanism and a holding member for stably holding the substrate on the table are required, so that the apparatus becomes large and expensive. It will be a thing. In addition, when the device is first operated, various initial settings of the operation part such as positioning of the substrate on the table, feed pitch, and pressing pressure of the break bar must be made, and a small amount of substrates (ie for mass production) It is not suitable for breaking non-standard products etc.).

Therefore, a simple tool for manually breaking a substrate as shown in FIG. 8 of Patent Document 4 has been proposed.
As shown in FIG. 9, this breaking tool is provided with a plurality of concave grooves 28 on the surface of the base 27, and inserts one end portion of the substrate W into the concave groove 28 to grasp the upper end portion of the substrate W by hand. The substrate W is broken from the scribe line S in the vicinity of the concave groove 28 by swinging in the front-rear direction indicated by arrows 9 (b).

JP 2013-071335 A JP 2013-079171 A JP 2009-227550 A Japanese Patent Publication No. 05-37097

Usually, when a thick plate is bent, the inner corner side at the bent portion is subjected to compressive stress and the outer corner side is subjected to tensile stress. In the breaking method shown in FIGS. 6 to 8 above, when the substrate is bent by the break bar, the surface on which the scribe line is provided is on the outer angle side (convex surface side) where the tensile stress is applied. It promotes crack penetration and facilitates fragmentation.
However, in the breaking tool of FIG. 9 described above, the upper end portion of the substrate is gripped by hand and shakes back and forth so that it is bent. When it is loaded and the scribe line reaches the breaking limit, it will be broken all at once. For this reason, the cross section of the substrate becomes messy, and a phenomenon called “sedge” indicated by reference numeral 29 in FIG.
In addition, when the upper end portion of the substrate is tilted so as to be bent by hand, the force applied to the left and right end portions of the substrate W becomes uneven, and the both ends of the divided substrate are denoted by reference numeral 31 in FIG. 10B. A phenomenon called “Tsuno” may occur. Such “sedge”, “brick”, and “horn” deteriorate the quality of the product after the break, and cause defective products.
In addition, it breaks by holding the upper edge of the substrate with your hand and bending it, so it requires a lot of force at the time of the break, and it is separated from the scribe line that is different from the target location, or the separation failure (scribe line) There is a risk that non-breaking parts will break. These defects become more conspicuous as the substrate having a shallow scribe line crack penetration or a substrate having a narrow scribe line pitch. For example, the scribe line crack penetration is 10% or less of the substrate thickness and the scribe line pitch is 3 mm or less. This substrate has a problem that the generation rate is high and it is hardly used in practice.

  Therefore, the present invention solves the above-described problems, and can break the substrate cleanly by hand, and can break reliably even on a substrate with shallow crack penetration or a substrate with a narrow scribe line pitch. The purpose is to provide a tool.

In order to solve the above problems, the present invention takes the following technical means. That is, the break tool of the present invention is such that the substrate has a receiving jig provided with a concave groove for inserting one end portion of the substrate on the surface and one end portion including a scribe line to be divided of the substrate protruding from the tip. A sandwiching jig that sandwiches and holds the first and second plate members that are assembled so as to be adjustable in a parallel posture with an interval between which the substrate is sandwiched, and the plate member and the substrate. The intermediate plate is formed of an elastic material, and the width of the intermediate plate is smaller than the width of the substrate.
It is preferable that the first plate member and the second plate member of the sandwiching jig are connected by an adjustment screw, and the interval can be adjusted by operating the adjustment screw.

In the present invention, the substrate can be sandwiched along the scribe line to be broken by the first plate member and the second plate member of the jig, and can be firmly fixed. Even if the penetration depth of the cracked substrate is small (for example, the crack depth is 10% or less of the substrate thickness) or the substrate having a narrow scribe line pitch (for example, the scribe line pitch is 3 mm or less). The board is not broken from the part other than the scribe line of the board, and it is not divided by the scribe line other than the intended scribe line, and the lever principle is made to tilt by using the tip of the sandwiching jig as a fulcrum. It can be applied to break with light force.
In addition, since an intermediate plate made of an elastic material is interposed between the first and second plates and the substrate, it is possible to prevent the substrate surface from being scratched, and to slightly tighten the tightening force of each adjusting screw. Even if there is a variation, the substrate can be securely held by the elastic force of the intermediate plate. As a result, the entire surface of the substrate can be pressed and tilted with a substantially uniform force, so that the occurrence of “horns” can also be suppressed.

In particular, in the present invention, as a result of forming the left and right width of the intermediate plate material to be smaller than the left and right width of the substrate, the “left and right” width of the intermediate plate material is larger than the case of forming the left and right width of the intermediate plate material. Occurrence can be further suppressed. This is thought to be due to the load on both ends of the substrate being reduced during the break.
That is, when the width of the intermediate plate is formed to be larger than the width of the substrate, particularly when the intermediate plate is an elastic material, when the substrate and the intermediate plate are tightened, the intermediate plate is compressed and the substrate of the intermediate plate is compressed. The part that does not face the surface is relatively expanded, and excessive stress is applied to the end face of the board, particularly the end in contact with the intermediate plate material, compared to the central part of the board. It is thought that stress is applied in an unnatural direction at the time of a break and induces the occurrence of “horn”.
On the other hand, in the present invention, since the end portion of the substrate is in an open state, unnecessary stress is not applied to the end portion of the substrate at the time of break, and the crack progresses naturally along the scribe line. Therefore, it is thought that the occurrence of “horn” is suppressed.

  Also, by bringing the scribe line at the tip of the substrate protruding from the tip of the sandwiching jig close to the tip of the sandwiching jig, the bending stress to the substrate when the sandwiching jig is tilted is concentrated on this scribe line. be able to. Thereby, the crack of a scribe line can be permeate | transmitted perpendicularly | vertically to the thickness direction of a board | substrate, and it can suppress that "sedge" and "debris" generate | occur | produce in a dividing surface. Also, cracks can be generated straight along the extending direction of the scribe line at the time of cutting, and the cracks can be prevented from running diagonally or meandering, resulting in a unit product with a high-quality split section. There is an effect that can be.

In the present invention, the receiving jig is formed such that a member forming one side wall of the concave groove is movable and adjustable in the groove width direction, and a member forming the bottom surface of the concave groove is in the depth direction of the concave groove. It is preferable to adopt a configuration in which movement adjustment is possible.
Thereby, the width and depth of the groove can be adjusted according to the thickness of the substrate to be divided and the pitch of the scribe lines, and can be used for breaking various substrates.

The perspective view which shows one Example of the break tool which concerns on this invention. Sectional drawing of the break tool of FIG. Explanatory drawing which shows the break procedure of the board | substrate using the break tool of FIG. The front view which shows the clamping jig | tool in the breaking tool of FIG. The top view which shows an example of the board | substrate broken by the breaking tool of FIG. Explanatory drawing which shows an example of the conventional general break method. Explanatory drawing which shows another example of the conventional break method. Explanatory drawing which shows another example of the conventional break method. Explanatory drawing which shows the further another example of the conventional break method. Explanatory drawing of the processing defect phenomenon which generate | occur | produces in a board | substrate partial cross section at the time of a break.

Below, the break tool of this invention is demonstrated in detail based on FIGS.
The break tool A according to the present invention has a receiving jig 1 provided with a linear groove 3 for inserting one end portion of the substrate W on the surface, and one end portion W ′ to be divided of the substrate W at the tip (see FIG. 1). And a sandwiching jig 2 that sandwiches and holds the substrate W in a state of protruding from the lower end.

The receiving jig 1 includes a fixed side wall member 3 a that forms one side wall of the groove 3, a movable side wall member 3 b that forms the other side wall, a movable bottom plate member 3 c that forms the bottom surface of the groove 3, and these members It is comprised with the base plate 4 holding.
The fixed side wall member 3 a is fixed to the base 4 via the support plate 5. The movable side wall member 3 b is slidably mounted on the base plate 4 only in the groove width direction, and is formed so that the groove width can be adjusted by the first adjustment bolt 6. The movable bottom plate member 3 c is disposed between the base plate 4 and the fixed side wall member 3 a and is held by the second adjustment bolt 7 so as to be movable and adjustable in the depth direction of the groove 3.

The sandwiching jig 2 includes a first plate member 8 and a second plate member 9 made of a hard material such as metal assembled in a parallel posture with an interval for sandwiching the substrate W therebetween, and between these plate members 8 and 9 and the substrate W. Are formed from intermediate plate members 11 and 11 respectively interposed therebetween. The intermediate plate 11 is made of an elastic material such as natural or synthetic rubber having a relatively high hardness.
The first plate member 8 and the second plate member 9 include flat sandwiching surfaces 8a and 9a facing each other, and the substrate W is sandwiched between the sandwiching surfaces 8a and 9a via the intermediate plate members 11 and 11. I try to do it. The intermediate plate 11 is attached such that the tip (lower end portion in FIG. 1) does not protrude from the tips of the first plate 8 and the second plate 9.
Further, the first plate member 8 and the second plate member 9 are connected by left and right adjustment screws 10, and the substrate W can be sandwiched and held by tightening the adjustment screws 10. Further, by loosening the adjusting screw 10, the substrate W between the two plate members 8 and 9 can be sequentially moved downward or detached.

  Further, as shown in FIG. 4, the intermediate plate 11 is formed such that the left and right width L1 of the intermediate plate 11 is smaller than the left and right width L2 of the substrate W, and the intermediate plate 11 does not overlap the left and right end portions of the substrate W to be sandwiched. A region L3 is left. This region L3 is preferably about 3 to 30% (particularly 5 to 15%) of the lateral width L2 of the substrate W. For example, when the lateral width of the substrate W is 50 mm, the length of the region L3 is preferably 1.5 to 15.0 mm (preferably 2.5 to 7.5 mm).

  The outer edges of the front ends of the first plate member 8 and the second plate member 9 of the sandwiching jig 2 are cut by an inclined surface that approaches the sandwiching surfaces 8a and 9a toward the distal end, and become tapered. In addition, as shown in FIG. 1, the adjustment board 10 which connects the 1st board | plate material 8 and the 2nd board | plate material 9 is good to provide a total of four one by one up and down. Thus, the parallel spacing between the two plate members 8 and 9 can be reliably held and the substrate W can be stably clamped with a uniform clamping force, but it is also possible to form only a pair of left and right.

Next, a method for breaking the substrate W using the break tool A will be described.
In this embodiment, an alumina substrate having a size of 50 mm × 60 mm square and a thickness of 1.0 mm was used as the substrate W to be broken. As shown in FIG. 5, a vertical scribe line S1 and a horizontal scribe line S2 are processed on the surface of the substrate W in the preceding scribe process. In addition, the space | interval (pitch) of each scribe line in a present Example is 2.5 mm.

As shown in FIGS. 1 to 3, the substrate W is sandwiched and held between the intermediate plate member 11 on the first plate member 8 side of the sandwiching jig 2 and the intermediate plate member 11 on the second plate member 9 side. At this time, as shown in FIG. 2, a substrate end portion W ′ including a horizontal scribe line S 2 ′ to be cut first is projected from the tip of the sandwiching jig 2. Further, the scribe line S2 ′ to be divided is preferably as close as possible to the tips of the first plate member 8 and the second plate member 9 of the sandwiching jig 2.
On the other hand, the width and depth of the concave groove 3 of the receiving jig 1 are adjusted in advance according to the thickness of the substrate W to be divided and the dimension of the protruding one end W ′. That is, the groove width of the concave groove 3 is adjusted to such a dimension that the protruding one end W ′ of the substrate can be inserted without rattling by moving the movable side wall member 3 b with the first adjustment bolt 6. Further, the groove depth is determined by moving the movable bottom plate member 3c with the second adjustment bolt 7 to the length from the scribe line S2 ′ to be divided to the edge of the substrate one end portion W ′ (pitch of the scribe line S2). (Length corresponding to).

FIG. 3 shows a process of breaking the substrate W using the breaking tool of FIG.
As shown in FIG. 3A, the upper end of the sandwiching jig 2 is grasped by hand, and the one end W ′ of the substrate protruding from the tip of the jig 2 is formed into the concave portion of the receiving jig 1 as shown in FIG. Insert into groove 3. Next, as shown in FIG. 3C, the sandwiching jig 2 is tilted to the opposite side of the scribe line S2 ′ to break the substrate one end portion W ′ from the scribe line S2 ′. When the sandwiching jig 2 is tilted, the outer edges of the tips of the first plate member 8 and the second plate member 9 are cut into an inclined surface so as to have a tapered shape. The jig 2 can be tilted with the contact portion as a fulcrum while being in contact with the surface of 1.
The substrate end portion W ′ thus broken is removed from the concave groove 3 of the receiving jig 1 and becomes a rectangular strip-shaped substrate W1 (see FIG. 5).

Then, after removing the substrate one end W ′ from the concave groove 3 of the receiving jig 1, the adjustment screw 10 of the sandwiching jig 2 is loosened, and the substrate W is pulled out to a position where the substrate one end W ′ to be separated next protrudes. . Then, after the adjustment screw 10 is tightened and the substrate W is sandwiched and held again, similarly to the above, the protruding substrate one end portion W ′ is inserted into the concave groove 3 of the receiving jig 1 to tilt the sandwiching jig 2 and protrude. Break one end W ′ of the substrate. By repeating such an operation sequentially, the substrate W is broken from all the scribe lines S2 in the horizontal direction, and a plurality of strip-shaped substrates W1 are taken out.
Thereafter, the strip-shaped substrate W1 is attached to the sandwiching jig 2 in a state where the vertical scribe line S1 is set sideways and the substrate end portion W ′ to be divided is protruded. Then, in the same manner as described above, the protruding substrate one end portion W ′ is inserted into the concave groove 3 of the receiving jig 1 and sequentially broken from the scribe line S1, thereby completing the unit product W2 shown in FIG.

When the substrate is cut by the break tool A described above, the substrate W is sandwiched between the first plate member 8 and the second plate member 9 of the sandwiching jig 2 and is firmly fixed. Even if the penetration depth of the cracked substrate is small (for example, the crack depth is 10% or less of the substrate thickness) or the substrate having a narrow scribe line pitch (for example, the scribe line pitch is 3 mm or less). In addition, the substrate is not broken from a portion other than the scribe line of the substrate, and is not divided by a scribe line other than the intended scribe line, and is lighter by application of this principle with the tip contact portion of the sandwiching jig 2 as a fulcrum. Can be divided by force.
Further, since the intermediate plate material 11 is interposed between the respective plate materials 8 and 9 and the substrate W, it is possible to prevent the surface of the substrate W from being damaged, and the tightening force of each adjustment screw 10 is slightly increased. Even if there is variation, the substrate W can be securely held by the elastic force of the intermediate plate 11. Accordingly, the entire surface of the substrate W can be pressed and tilted with an equal force, so that the occurrence of “horn” as described at the beginning can be suppressed.
In particular, in the present invention, the left and right width L1 of the intermediate plate material 11 is formed to be smaller than the left and right width L2 of the substrate W, so that regions L3 where the intermediate plate material 11 does not overlap are left at both left and right end portions of the sandwiched substrate W. Therefore, it is considered that the load on both ends of the substrate is reduced during the break.

Further, since the scribe line S2 for dividing the substrate one end portion W ′ protruding from the tip of the sandwiching jig 2 is located as close as possible to the tip of the sandwiching jig 2, the tilting jig 2 is tilted. Bending stress on the substrate W is intensively applied to the scribe line S2. Thereby, the crack of scribe line S2 can be permeate | transmitted perpendicularly | vertically to the thickness direction of the board | substrate W, and generation | occurrence | production of the "sedge" in a dividing surface can be suppressed.
Furthermore, since the tip of the sandwiching jig 2 is arranged along the scribe line S2 at a position close to the scribe line S2, a crack is generated straight along the extending direction of the scribe line at the time of division, and the crack is oblique. It is possible to suppress running and meandering, and to obtain a unit product W2 having a high-quality dividing section.

  As mentioned above, although the typical Example of this invention was described, this invention is not necessarily limited only to said Example structure. For example, in the above embodiment, the concave groove 3 of the receiving jig 1 is formed so as to face upward, but it can also be formed sideways. Others In the present invention, the object can be achieved and modified and changed as appropriate without departing from the scope of the claims.

  The present invention can be applied to a break tool for manually breaking a substrate made of a brittle material such as ceramic.

A Break tool L1 Left and right width L2 of the intermediate plate material L3 Left and right width L3 Region where the intermediate plate material does not overlap W Brittle material substrate W 'One end portion of the substrate protruding from the tip of the sandwiching jig S1 Vertical scribe line S2 Horizontal scribe line DESCRIPTION OF SYMBOLS 1 Receiving jig 2 Clamping jig 3 Groove 3a Fixed side wall member 3b Movable side wall member 3c Movable bottom plate member 4 Base board 8 First plate material 9 Second plate material 10 Adjustment screw 11 Intermediate plate material

Claims (3)

A receiving jig provided with a concave groove for inserting one end portion of the substrate on the surface;
A sandwiching jig for sandwiching and holding the substrate in a state where one end portion including a scribe line to be divided of the substrate is projected from the tip;
The sandwiching jig is formed of a first plate member and a second plate member assembled so as to be adjustable in a parallel posture with an interval for sandwiching the substrate therebetween, and an intermediate plate member interposed between the plate member and the substrate. And
A break tool for a brittle material substrate, wherein the intermediate plate is formed of an elastic material, and the width of the intermediate plate is smaller than the width of the substrate.   2. The break tool for a brittle material substrate according to claim 1, wherein a first plate member and a second plate member of the sandwiching jig are connected to each other by an adjustment screw, and the interval can be adjusted by operating the adjustment screw. .   The receiving jig is formed such that a member forming one side wall of the concave groove is movable and adjustable in the groove width direction, and a member forming the bottom surface of the concave groove is movable and adjustable in the depth direction of the concave groove. The break tool for a brittle material substrate according to claim 1 or 2, wherein the break tool is formed.

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