JP5510525B2 - Chip holder unit and holder - Google Patents

Description

  The present invention relates to a chip holder unit and a holder for holding a scribing wheel for scribing a brittle material substrate.

  A scribing device is used for scribing and dividing the brittle material substrate to a desired dimension. The scribing device includes a chip holder unit on a scribing head facing the brittle material substrate. FIG. 1 is a side view of a conventional chip holder unit. The chip holder unit 100 includes a chip holder 110, a scribing wheel 120, and a pin 130, and the scribing wheel is attached to the chip holder.

  As shown in FIG. 1, a holder groove 111 and a pin hole 112 are formed in the lower part of the chip holder 110. The scribing wheel 120 is a disk-shaped member, has a through-hole penetrating the center of two circular side surfaces, and has a V-shaped blade along the outer periphery of the scribing wheel 120. The V-shaped cutting edge forms a ridge line along the outer periphery of the scribing wheel 120. The inclined surfaces (outer peripheral portions) on both sides of the ridge line usually intersect with each other at an angle (convergence angle) of 90 to 160 ° to form a ridge line. The pin 130 is a cylindrical member, and is inserted into the through hole of the scribing wheel 120 and the pin hole 112 of the holder 110 to hold the scribing wheel 120 rotatably.

  The chip holder 100 holds the scribing wheel 120 in the holder groove 111 using pins 130 and holds it by a shaft pressing cover (not shown). There exists a thing shown in patent document 1 as a scribe apparatus provided with such a chip holder unit.

International Patent Publication No. WO2007 / 063979

  The thickness d of the scribing wheel is, for example, about 0.65 mm, and the tolerance is, for example, −5 to 15 μm. On the other hand, the width w of the holder groove is, for example, 0.65 mm corresponding to the thickness d of the scribing wheel, and the tolerance is 0 to +20 μm. This tolerance ensures a slight clearance between the scribing wheel and the holder groove. By this clearance, the scribing wheel can move in the axial direction by about 5 to 35 μm, for example, corresponding to the difference in tolerance in the axial direction of the pin in the holder groove. However, since the clearance is provided, the linearity of the scribe line may be deteriorated when the substrate is scribed, which causes the maximum wobbling of about 35 μm.

  This problem can be solved by making the tolerance of the scribing wheel thickness and the width of the holder groove smaller, but in reality, it is difficult to make these tolerances even smaller, and the manufacturing price increases. is there. Further, if the tolerance is too small, there is a problem that it becomes difficult to insert the scribing wheel into the holder groove.

  The present invention has been made to improve the linearity of the scribe line in such a conventional scribing device, and aims to stabilize the holding position of the scribing wheel and improve the linearity.

In order to solve this problem, the chip holder unit of the present invention has a disk shape, a through hole in the center, and two curved surfaces that form a cutting edge that forms a V-shaped ridge line along the outer periphery of the disk. A holder groove having a certain width for inserting the scribing wheel between a pair of support portions having opposing surfaces parallel to each other, a pin hole that coaxially penetrates the pair of support portions, A chip comprising: a holder having at least one shaft pressing cover that covers the pin hole; and a pin that is inserted into the pin hole and the through-hole of the scribing wheel and rotatably holds the scribing wheel in the holder groove. In the holder unit, a spacing adjustment is formed coaxially with the pair of support portions of the holder, and has a through hole in one of the support portions and a thread groove in the other. And the hole, is inserted from the through hole of the spacing adjustment holes, have a, an adjusting screw for adjusting the distance between said holder groove the scribing wheel, the pin hole is provided at a lower end center of the pair of support portions the gap adjusting hole is shall be formed on top of the pin hole of the central pair of support portions of the holder.

  Here, a second screw groove formed in one support part of the holder and an interval between the holder grooves in contact with the inner wall of the other support part of the pair of support parts, inserted into the second screw groove. And a tightening prevention screw that keeps the value above a predetermined value.

Here, the second thread groove may be formed in an upper portion of the pin hole at the center of one support portion of the holder .

  Here, one diameter of the pin hole may be narrowed on the outer peripheral side of the support portion.

  In order to solve this problem, a holder according to the present invention includes a holder groove having a certain width for inserting a scribing wheel between a pair of support portions having opposing surfaces parallel to each other, and the pair of support portions. A holder having at least one shaft pressing cover that covers the pin hole, and is formed coaxially with a pair of support portions of the holder, with a through hole in one of the support portions and a screw in the other A gap adjusting hole having a groove, and an adjusting screw that is inserted from a through hole of the gap adjusting hole and adjusts a distance between the holder groove and the scribing wheel, and the pin hole is formed between the pair of support portions. Provided in the center of the lower end, the interval adjusting hole is formed in the upper part of the pin hole in the center of the pair of support portions of the holder.

  Here, a second screw groove formed in one support part of the holder and an interval between the holder grooves in contact with the inner wall of the other support part of the pair of support parts, inserted into the second screw groove. And a tightening prevention screw that keeps the value above a predetermined value.

Here, the second thread groove may be formed in an upper portion of the pin hole at the center of one support portion of the holder .

  According to the present invention having such characteristics, the position where the scribing wheel is held can be stabilized, and the linearity of the scribe line formed on the brittle material substrate can be improved.

FIG. 1 is a diagram showing a configuration of a conventional holder unit. FIG. 2 is a front view showing the configuration of the chip holder unit according to the first embodiment of the present invention. FIG. 3 is a front view showing the configuration of the chip holder according to the first embodiment of the present invention. FIG. 4 is a side view of the chip holder according to the first embodiment of the present invention. FIG. 5 is a sectional view of the chip holder according to the first embodiment of the present invention. FIG. 6 is a side view of the chip holder unit according to the first embodiment of the present invention. FIG. 7 is a front view showing the configuration of the chip holder unit according to the second embodiment of the present invention. FIG. 8 is a cross-sectional view of a chip holder unit according to the second embodiment of the present invention.

(First embodiment)
A chip holder unit according to an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a front view of the chip holder unit. The chip holder unit 1 has a chip holder 10 and a scribing wheel 30. The scribing wheel 30 is rotatably held at the lower end of the chip holder 10. As shown in FIGS. 3, 4, and 5, the chip holder 10 is a rectangular parallelepiped member formed in a triangular shape on the lower side, and has a through hole 11 for fixing the chip holder 10 on the upper part. . A triangular holder groove 12 is formed below the chip holder 10 so as to open downward, and the triangular portions sandwiching the holder groove 12 are referred to as support portions 13 and 14. The opposing surfaces of the support portions 13 and 14 of the chip holder 10 are formed substantially in parallel, and the interval w between the holder grooves 12 is set to be slightly larger than the width of the scribing wheel 30. The width of the holder groove 12 is about 0.67 mm, for example.

  Pin holes 15 and 16 penetrating the support portions 13 and 14 are formed coaxially at the lowermost ends of the left and right support portions 13 and 14, respectively. The pin holes 15 and 16 intersect the holder groove 12 perpendicularly and are circular through holes that hold the pins of the scribing wheel 30. At the upper part of these pin holes, a through hole 17 having a small inner diameter at the support groove 13 side and a large outer diameter at the holder groove 12 side is formed, and a screw groove 18 coaxial with this is formed in the support section 14. These are referred to as interval adjusting holes. The interval adjusting hole is used to finely adjust the interval w of the holder groove 12.

  As shown in FIG. 3, a screw groove 19 is provided in the support portion 14 on the left side of the screw groove. A similar thread groove (not shown) is also provided in the support portion 13. These screw grooves are for holding the shaft pressing covers 21 and 22 so as not to drop the pins. As shown in FIG. 2, the shaft pressing covers 21 and 22 have a washer shape with one end protruding.

  The scribing wheel 30 is a disk-shaped member made of, for example, sintered diamond and having a thickness d of about 0.65 mm, for example, and has a through hole at the center. The scribing wheel 30 has a V-shaped blade that forms a ridge line along the outer periphery. The inclined surfaces (outer peripheral portions) on both sides of the ridge line usually intersect with each other at an angle (convergence angle) of 90 to 160 ° to form a ridge line. The pin 31 is, for example, a cylindrical member formed of a metal such as cemented carbide or sintered diamond, and one end has a pointed shape.

  Next, the assembly of the chip holder unit according to this embodiment will be described. First, as shown in FIG. 6, the adjusting screw 23 is inserted from the through hole 17 and engaged with the screw groove 18. At this time, the adjusting screw 23 is not tightened. Next, the shaft pressing cover 21 is attached by screws 24 from the support portion 13 side, and one end of the pin hole 15 is closed. Next, the scribing wheel 30 is inserted and held in the holder groove 12, and the pin 31 is inserted into the pin hole 16, the through hole of the scribing wheel 30, and the pin hole 15 from the pointed portion. The pin 31 is inserted until the pointed portion of the pin 31 is in contact with the shaft pressing cover 21 in the vicinity of one opening of the pin hole 15, and the shaft pressing cover 22 is screwed with the screw 25 as shown in FIG. Then, the left end of the pin hole 16 is closed. As a result, the pin 31 does not fall out of the pin hole, and the scribing wheel 30 is rotatably held by the pin 31.

  At this time, the clearance between the holder groove 12 of the chip holder and the scribing wheel 30 varies as described above. Therefore, the interval is adjusted by the adjusting screw 23 inserted into the interval adjusting hole. Regarding the adjustment of the adjusting screw 23, it is conceivable that the adjusting screw is gradually tightened while scribing and set immediately before the rotation resistance starts to increase. In addition, the width w of the holder groove in the product state and the thickness d of the scribing wheel 30 are measured in advance. It may be set. Alternatively, a desired clearance may be set by tightening the adjusting screw 23 to a position where the tightening can be maximized with the scribing wheel attached, and returning the angle by a predetermined angle or a predetermined number of rotations.

  Thus, the clearance can be set to an optimum value, for example, an interval of 2 μm. If the scribing is performed in this state, the position of the scribing wheel 30 in the holder groove 12 is stabilized, so that there is almost no left-right shaking with respect to the traveling direction of the scribing wheel 30. Thereby, the linearity of the scribe line when scribed can be improved.

  In this embodiment, the pins are held from both sides of the pin holes 15 and 16 by using the pressing covers 21 and 22, but the pin is held by reducing the diameter of one pin hole on the outer peripheral side of the support portion. You may make it do.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In this embodiment, as shown in a front view in FIG. 7 and a cross-sectional view in FIG. 8, a second screw groove 26 is further formed in the upper part on the support portion 14 side of the holder, and the holder groove is slightly deepened. There are other configurations similar to those of the first embodiment. In this embodiment, the tightening prevention screw 27 is embedded in advance from the screw groove 26 and brought into contact with the inner wall of the support portion 13 so that the distance between the holder grooves 12 between the support portions cannot be adjusted to be narrower than a predetermined value. I have to. In this way, it is possible to prevent excessive tightening during adjustment with the adjusting screw 23.

  In this embodiment, one screw groove 26 and one fastening prevention screw 27 are provided, but a plurality of screw grooves 26 and fastening prevention screws 27 may be provided.

  The chip holder unit according to the present embodiment is not limited to an automatic scribing device that automatically scribes a brittle material substrate, but can also be used by being attached to a brittle material cutting cutter that manually cuts a brittle material substrate.

  Since the position of the scribing wheel during scribing can be stabilized, the present invention can be used for a scribing device that automatically performs scribing and a brittle material cutting cutter that manually cuts a brittle material substrate.

DESCRIPTION OF SYMBOLS 1 Tip holder unit 10 Tip holder 11 Through-hole 12 Holder groove | channel 13,14 Support part 15,16 Pin hole 23 Adjustment screw 24,25 Screw 26 Screw groove 27 Tightening prevention screw 30 Scribing wheel 31 Pin

Claims (7)

A scribing wheel having two curved surfaces that are disk-shaped and have a through-hole in the center, forming a cutting edge forming a V-shaped ridge line along the outer periphery of the disk;
A holder groove having a certain width for inserting the scribing wheel between a pair of support portions having opposing surfaces parallel to each other, a pin hole extending coaxially through the pair of support portions, and covering at least the pin hole A holder having one shaft holding cover;
In a chip holder unit comprising: a pin inserted into the pin hole and a through hole of the scribing wheel, and a pin that rotatably holds the scribing wheel in the holder groove;
A spacing adjustment hole formed coaxially on the pair of support portions of the holder, having a through hole on one side of the support portion and a thread groove on the other side,
Wherein is inserted from the through hole of the spacing adjustment holes have a, an adjusting screw for adjusting the distance between the scribing wheel and the holder groove,
The pin holes provided at the lower end center of the pair of support portions, the gap adjusting hole of the pair of support portions a center of the pin hole chip holder unit that will be formed on top of the holder. A second thread groove formed in one support portion of the holder;
2. The chip according to claim 1, further comprising: a tightening prevention screw which is inserted into the second screw groove and is in contact with an inner wall of the other support portion of the pair of support portions to keep the interval between the holder grooves at a predetermined value or more. Holder unit. The second screw groove, the tip holder unit according to claim 2, wherein is formed on top of the center of the pin hole of one of the support portion of the holder. Tip holder unit according to any one of claims 1 to 3, one of the diameter of the pin hole is narrow at the supporting portion outer peripheral side. A holder groove having a certain width for inserting a scribing wheel between a pair of support portions having opposing surfaces parallel to each other, a pin hole coaxially passing through the pair of support portions, and covering the pin hole In a holder having at least one shaft pressing cover,
A spacing adjustment hole formed coaxially on the pair of support portions of the holder, having a through hole on one side of the support portion and a thread groove on the other side,
Wherein is inserted from the through hole of the spacing adjustment holes have a, an adjusting screw for adjusting the distance between the scribing wheel and the holder groove,
The pin holes provided at the lower end center of the pair of support portions, the spacing adjustment holes Ru is formed in an upper portion of the pin hole of the central pair of support portions of the holder holder. A second thread groove formed in one support portion of the holder;
The holder according to claim 5 , further comprising: a tightening prevention screw that is inserted into the second screw groove and is in contact with an inner wall of the other support portion of the pair of support portions to keep a distance between the holder grooves at a predetermined value or more. .   The holder according to claim 6, wherein the second screw groove is formed in an upper portion of the pin hole at the center of one support portion of the holder.

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