JP4960428B2 - Chip holder unit - Google Patents

Description

  The present invention relates to a chip holder unit that holds 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

  Since the conventional scribing wheel uses the pin groove as a bearing, if the rotational resistance of the scribing wheel is large and the clearance with the holder groove is large, the linearity of the scribe line formed on the substrate is lowered. When the linearity is appropriately maintained, the rolling friction coefficient is, for example, 0.2 to 0.25 cN · cm, and the friction coefficient tends to increase with time. Therefore, there has been a drawback that it is difficult to stably hold the scribing wheel with low resistance.

  The present invention has been made in view of such conventional problems, and uses a tip holder unit that rotatably holds a scribing wheel by a pin, and reduces rotational resistance while stably holding the scribing wheel. An object of the present invention is to provide a chip holder unit that can be used.

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 coaxially penetrating the pair of support portions, And a holder having 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, on a side wall on both sides of the scribing wheel. A pair of cylindrical collars having a predetermined thickness in contact with each other, and provided between the pair of collars and the support portion; And have a, a bearing for rotatably holding the scribing wheel, the pair of color is one that contacts only the inner ring of the bearing, said pair of collar has a larger flange than the outer ring of the bearing The flange does not contact the bearing and the scribing wheel .

  According to the chip holder unit of the present invention having such a feature, the pins penetrating the scribing wheel are held by the pair of bearings. For this reason, a rolling friction coefficient becomes small and rotation can be made smooth. The rolling friction coefficient can be maintained smoothly without increasing even after a long time.

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 front view of the cover plate according to the first embodiment of the present invention. FIG. 7 is a sectional view showing the configuration of the chip holder unit according to the first embodiment of the present invention. FIG. 8 is a perspective view showing an example of a collar according to the embodiment of the present invention. FIG. 9 is a cross-sectional view showing a configuration of a chip holder unit according to the second embodiment of the present invention.

(First embodiment)
A chip holder unit according to a first 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 sufficiently larger than the width of the scribing wheel 30.

  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. The pin holes 15 and 16 are slits whose lower ends are slightly opened. In addition, screw grooves 17 and 18 penetrating the support portions 13 and 14 on both sides are formed on the left and right sides of the support portions 13 and 14.

  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 of 75 to 170 °, more preferably 90 to 150 ° (convergence angle) 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.

  FIG. 6 shows a cover plate attached to the outside of the left and right support parts 13 and 14 of the chip holder. Since two cover plates 20A and 20B having the same shape are used as the cover plate, the cover plate 20A will be described below. The cover plate 20 </ b> A is a substantially triangular flat plate member having substantially the same shape as the support portion 13, and through holes 21 and 22 are formed at positions corresponding to the screw grooves 17 and 18 of the support portions 13 and 14. .

  Now, the assembly of the chip holder unit will be described with reference to FIGS. First, the plate 20A is attached by screws 24A and 25A from the support portion 13 side, and one end of the pin hole 15 is closed. Next, the pin 31 is inserted into the pin hole 16, the bearing 41, and the cylindrical collar 42 shown in FIG. 8A from the pointed portion, and the scribing wheel 30 is inserted into the holder groove 12 and held while being scribed. It is inserted into the through hole of the wheel 30 and further inserted into the pin hole 15. Next, the collar 31 and the bearing 44 are passed through the pin 31. 7, the collar 42 can be brought into contact with the right side wall of the scribing wheel 30, the inner ring of the bearing 41 can be brought into contact with the collar 42, and the outer ring of the bearing 41 can be brought into contact with the support portion 13. Similarly, the cylindrical collar 43 is brought into contact with the left side wall of the scribing wheel 30, the inner ring of the bearing 44 is brought into contact with the collar 43, and the outer ring of the bearing 44 is arranged in contact with the support portion 14. That is, the collars 42 and 43 are in contact only with the inner rings of the bearings 41 and 44, respectively. Next, the cover plate 20B is attached and fixed by screws 25A and 25B (not shown) from the outside of the support portion 14 of the chip holder 10, respectively. As a result, the left end of the pin hole 16 can be closed, and the pin 31 will not fall out of the pin hole. By appropriately selecting the thicknesses of the collars 42 and 43, the scribing wheel 30 is held rotatably by the bearings 41 and 44 together with the collars 42 and 43 without moving in the axial direction.

  Here, the bearings 41 and 44 are small-diameter bearings having an inner diameter of 0.7 mm and an outer diameter of 2.0 mm, for example. By holding both ends of the scribing wheel with such a small-diameter bearing, when the scribing wheel is rotated and scribed, the friction of the bearing portion is reduced, and the rolling friction coefficient is, for example, 0.05 to 0.07 cN · m. Can be greatly reduced. Therefore, rotation becomes smooth and a scribe load can be lightened. Further, since the scribe load is transmitted to the scribing wheel without loss, the linearity of the scribe line can be improved.

  In this embodiment, the pins are held by using the cover plates 20A and 20B from both sides of the pin holes 15 and 16, but the diameter of one pin hole is narrowed on the outer peripheral side of the support portion to hold the pin. You may make it do.

(Second Embodiment)
In the first embodiment, the collars 42 and 43 are simply cylindrical members. However, as shown in FIG. 8B, the collar 45 (46) is a flange 45a (46a) that does not contact the outer ring of the bearings 41 and 44. ). FIG. 9 is a cross-sectional view of the chip holder unit according to the second embodiment using the collars 45 and 46. In this way, the possibility of mixing cullet during scribing into the bearings 41 and 44 by the flanges 45a and 46a can be reduced.

  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 13, 14 Support part 15, 16 Pin hole 20A, 20B Cover plate 24A, 24B, 25A, 25B Screw 30 Scribing wheel 31 Pin 42, 43, 45, 46 Color 41 44 Bearing 45a, 46a Flange

Claims (1)

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 passing coaxially through the pair of support portions, and the pin hole and In a chip holder unit comprising a holder inserted into a through hole of a scribing wheel and having a pin that rotatably holds the scribing wheel in the holder groove,
A pair of cylindrical collars having a predetermined thickness contacting the side walls on both sides of the scribing wheel;
Wherein provided between the pair of color and the support portion, have a, a bearing for rotatably holding the collar and the scribing wheel,
The pair of collars contact only the inner ring of the bearing, the pair of collars have a flange larger than the outer ring of the bearing, and the flange does not contact the bearing and the scribing wheel .

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