JP5440809B2 - Tip holder - Google Patents

Description

  The present invention relates to a chip holder for a scribing device that forms a scribe line for dividing a brittle material substrate.

  There are scribing devices for scribing brittle material substrates to the desired dimensions. The scribing device includes a holder unit on a scribing head facing the brittle material substrate, and a chip holder having a scribing wheel is attached to the holder unit. FIG. 1 is a diagram showing a configuration of a conventional chip holder. FIG. 1A is a front view, FIG. 1B is a side view, and FIG. The chip holder 100 has a holder 101, a scribing wheel 102, and a pin 103.

  As shown in FIG. 1, a holder groove 104 and a pin hole 105 are formed in the lower part of the chip holder 100. The scribing wheel 102 is a disk-shaped member, and has a through-hole penetrating the center of two circular side surfaces and a V-shaped blade along the outer peripheral portion of the scribing wheel 102. The V-shaped cutting edge forms a ridge line along the outer periphery of the scribing wheel 102. 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 103 is a cylindrical member, and is inserted into the through hole of the scribing wheel 102 and the pin hole 105 of the holder 101 to hold the scribing wheel 102 rotatably.

  The chip holder 100 holds the scribing wheel 102 in the holder groove 104 and inserts and fixes the pin 103 into the pin hole 105 and the through hole of the scribing wheel 102. There exists a thing shown in patent document 1 as a scribe apparatus provided with such a chip holder.

International Patent Publication No. WO2007 / 063979

  The thickness of the scribing wheel is, for example, about 0.65 mm. The width of the holder groove is, for example, about 0.02 mm wider than the thickness of the scribing wheel, and a clearance is secured between the scribing wheel and the holder groove. This clearance allows the scribing wheel to move about 0.02 mm along the pin within the holder groove. However, since the clearance is provided, the formation position of the scribe line is not stable and causes a deviation from a desired position.

  The present invention has been made in view of the problem that the scribe line formation position shifts in such a conventional scribing apparatus, which stabilizes the scribe line formation position and causes a deviation from a desired position. The purpose is to avoid.

In order to solve this problem, a chip holder according to the present invention includes a holder groove for inserting a scribing wheel in a lower part, a holder groove forming part separated by the holder groove , and a holder groove forming part in a straight line. A holder having a circular pin hole penetrating coaxially,
The holder groove is provided perpendicular to the lower surface of the tip holder, in which the axis of the pin holes are formed inclined from the vertical with respect to the holder groove.

In order to solve this problem, a chip holder according to the present invention includes a holder groove for inserting a scribing wheel in a lower part, a holder groove forming part separated by the holder groove, and a holder groove forming part in a straight line. A holder having a circular pin hole penetrating coaxially,
The holder groove is provided perpendicular to the lower surface of the tip holder, the axis of the pin holes is intended to abut moved to one side of the holder groove.

  According to the present invention having such characteristics, the formation position of the scribe line on the brittle material substrate can be stabilized, and variations in the formation accuracy of the scribe line can be eliminated.

FIG. 1 is a diagram showing a configuration of a conventional chip holder. FIG. 2 is a diagram showing a configuration of a scribe head according to a first reference example of the present invention. FIG. 3 is a diagram showing the configuration of the holder unit according to the first reference example of the present invention. FIG. 4 is a view showing a state when the chip holder is inserted into the holder joint according to the first reference example of the present invention. FIG. 5 is a diagram showing the configuration of the tip holder according to the first reference example of the present invention. FIG. 6 is a view showing pins used for the chip holder. FIG. 7 is a view showing the movement of the scribing wheel of the chip holder according to the first reference example of the present invention. FIG. 8 is a diagram showing a configuration of a chip holder according to a second reference example of the present invention. FIG. 9 is a diagram showing pins used for the chip holder. FIG. 10 is a view showing the movement of the scribing wheel of the chip holder according to the second reference example of the present invention. FIG. 11 is a diagram showing the configuration of the chip holder according to the embodiment of the present invention. FIG. 12 is a diagram showing pins used for the chip holder. FIG. 13 is a view showing the movement of the scribing wheel of the chip holder according to the embodiment of the present invention. FIG. 14 is a diagram showing a configuration of a chip holder according to a third reference example of the present invention. FIG. 15 is an enlarged view showing a cross section of a scribing wheel 12C according to a third reference example of the present invention. FIG. 16 is a view showing movement of the scribing wheel of the chip holder according to the third reference example of the present invention. FIG. 17 is an enlarged view showing a scribing wheel 12D according to a first modification of the third reference example of the present invention and its cross section. FIG. 18 is an enlarged view showing a scribing wheel 12E according to a second modification of the third reference example of the present invention and its cross section.

(First reference example)
A first reference example of the chip holder and the holder unit of the present invention will be described with reference to FIGS. FIG. 2 is a diagram showing the configuration of the scribe head and the holder unit of the present embodiment. A holder unit including a chip holder 10 </ b> A and a holder joint 20 is attached to the lower part of the scribe head 1.

  3 and 4 are views showing the chip holder and the holder joint. As shown in FIG. 3, the chip holder 10A has a mounting portion formed by cutting out the upper portion of the holder 11A and a scribing wheel 12A at the lower portion of the holder 11A.

  Next, as shown in FIGS. 3 and 4, the holder joint 20 has bearings 21 a and 21 b in the upper portion, and the lower portion serves as a holding portion 22 that holds the chip holder. A circular opening 23 is formed in the holding portion 22 of the holder joint 20 as shown in the figure, and a magnet 24 is embedded therein. A parallel pin 25 perpendicular to the central axis is provided in the opening 23 at a position separated from the central axis. The parallel pin 25 is a cylindrical member that contacts the mounting portion of the holder 11A and positions the chip holder 10A as shown.

  When the chip holder 10A is attached to the holder joint 20, the chip holder 10A is inserted into the opening 23 of the holder joint 20 from the attachment portion as shown in FIG. If it does so, the front-end | tip part of 10 A of chip | tip holders will be attracted | sucked by the magnet 24, and also an attaching part will contact the parallel pin 25, and will be positioned and fixed.

  Thus, the chip holder 10A fixed to the holder joint 20 is rotatable together with the holding portion 22 around the central axes of the bearings 21a and 21b. Usually, the center of the scribing wheel 12A of the chip holder 10A is arranged offset at a position spaced apart from the central axis of the bearings 21a and 21b. Even if the scribing direction changes during scribing due to this offset, the holding portion 22 has a bearing so that the scribing wheel 12A is always located behind the central axes of the bearings 21a and 21b in the moving direction of the holder joint 20. It is rotated by 21a and 21b. Therefore, the scribing wheel 12A that is being scribed rotates in a certain direction.

  FIG. 5 is a diagram simply showing the configuration of the chip holder 10A. FIG. 5A is a front view, FIG. 5B is a side view, and FIG. 5C is a view showing a lower surface. The X-axis direction indicated by an arrow in the figure indicates the horizontal direction of the paper surface, and the Y-axis direction indicates the vertical direction of the paper surface. The chip holder 10A shown in FIGS. 5A and 5B is drawn so that the upper and lower surfaces are parallel to the X-axis direction. The chip holder 10A has a holder 11A, a scribing wheel 12A, and a pin 13A.

  The holder 11A is a cylindrical member made of, for example, metal, and has a mounting portion formed by cutting out a part of the upper portion as shown in FIG. As shown in FIG. 5A, the holder 11 </ b> A has a holder groove 14. The holder groove 14 has a width of about 0.67 mm, for example, and is formed parallel to the Y-axis direction. Furthermore, the holder 11A has a pin hole 15A. The pin hole 15A is a circular through hole that passes through the holder 11A parallel to the X-axis direction and intersects the holder groove 14 perpendicularly. Further, the pin hole 15A has a step portion in the vicinity of the opening at the right end of FIG. Due to this stepped portion, one opening has a smaller diameter than the other opening.

  The scribing wheel 12A is a disk-shaped member made of, for example, sintered diamond and having a thickness of about 0.65 mm, for example, and has a through hole at the center. The scribing wheel 12A has a V-shaped blade along the outer periphery, and the V-shaped cutting edge forms a ridge line along the outer periphery of the scribing wheel 12A, and is positioned in the middle in the thickness direction of the scribing wheel 12A. doing. 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.

  FIG. 6 shows the pin 13A. The pin 13A is, for example, a cylindrical member formed of a metal such as cemented carbide or sintered diamond, and one end has a pointed shape. A spiral groove is cut on the surface of the pin 13A. Both the groove width and the groove depth of the spiral groove are, for example, several μm.

  The scribing wheel 12A is inserted and held in the holder groove 14, and the pin 13A is inserted into the pin hole 15A and the through hole of the scribing wheel 12A from the pointed portion. The pin 13A is fixed to the pin hole 15A where the pointed portion of the pin 13A is in contact with a step portion near one opening of the pin hole 15A. As a result, the scribing wheel 12A is rotatably held by the pin 13A, and the chip holder 10A shown in FIG. 5 is obtained.

  When the chip holder 10A is attached to the holder joint, fixed to the scribe head, and the tip holder 10A is moved relative to the brittle material substrate while the scribing wheel 12A is in contact with the brittle material substrate, the scribing wheel 12A is moved to the chip holder 10A. Accordingly, the substrate moves relative to the brittle material substrate while rotating in accordance with the movement, and a scribe line is formed on the brittle material substrate. At this time, a sliding frictional force is generated between the rotating scribing wheel 12A and the pin 13A, and the scribing wheel 12A is moved along the pin 13A as shown in FIG. ) Move to the right. The moved scribing wheel 12A moves to a position in contact with the side surface of the holder groove 14 as shown in FIG. 7, and continues to form a scribe line.

  In this example, when the scribing wheel 12A is in contact with the side surface of the holder groove 14, a gap of about 0.02 mm is formed between the scribing wheel 12A and the side surface that is not in contact, but this state is maintained while the scribing wheel 12A is rotating. Is done. Therefore, since the position of the scribing wheel 12A in the holder groove 14 is stabilized, there is no left-right shake with respect to the traveling direction of the scribing wheel 12A, and the position of the formed scribe line is stabilized.

  A spiral groove such as the pin 13A may be cut on the inner wall of the through hole of the scribing wheel 12A. If the direction in which the spiral groove is engraved is determined in consideration of the rotational direction of the scribing wheel 12A, the scribing wheel 12A can be moved and held to a position in contact with the side surface of the holder groove 14 more reliably.

  Further, the same effect as in this reference example can be obtained even if the chip holder 10A is configured by making a spiral groove on the inner wall of the through hole of the scribing wheel 12A and making the surface of the pin 13A smooth.

(Second reference example)
A chip holder according to a second reference example of the present invention will be described with reference to FIGS. The configuration of the scribe head according to the present embodiment is the same as that of the first reference example. FIG. 8 is a front view showing the configuration of the chip holder 10B according to the present embodiment. The chip holder 10B has a holder 11B, a scribing wheel 12A, and a pin 13B. The same components as those used in the first reference example are denoted by the same reference numerals.

  The structure of the holder 11B is substantially the same as the holder 11A of the first reference example, and has a holder groove 14 and a pin hole 15B. Similar to the pin hole 15A of the first reference example, the pin hole 15B passes through the holder 11B parallel to the X-axis direction and intersects the holder groove 14 perpendicularly, but the shape is the pin hole 15A of the first reference example. And has a tapered shape as shown in FIG. The pin hole 15B penetrating the holder 11 has a step portion in the vicinity of the opening at the right end of FIG. 8 like the pin hole 15A of the first reference example.

  FIG. 9 shows the pin 13B. The pin 13B is a member formed in a taper shape such as a metal such as cemented carbide or a sintered diamond, and the right end having a small diameter has a pointed shape. The inner diameter of the pin hole 15B and the outer diameter of the pin 13B are large enough to allow the pin 13B to be inserted into the pin hole 15B without any gap.

  The chip holder 10B is configured using the holder 11B, the scribing wheel 12A, and the pin 13B. The scribing wheel 12A is inserted and held in the holder groove 14, and the pin 13B is inserted into the pin hole 15B and the through hole of the scribing wheel 12A from the pointed portion. The pin 13B is fixed to the pin hole 15B where the pointed portion of the pin 13B comes into contact with a step near the opening of the pin hole 15B. As a result, the scribing wheel 12A is rotatably held by the pin 13B, and the chip holder 10B shown in FIG. 8 is configured.

  When the chip holder 10B is attached to the holder joint, and further fixed to the scribe head, the chip holder 10B is moved relative to the brittle material substrate while the scribing wheel 12A of the chip holder 10B is brought into contact with the brittle material substrate. Moves relative to the brittle material substrate while rotating in accordance with the movement of the chip holder 10B, and a scribe line is formed on the brittle material substrate. At this time, the rotating scribing wheel 12A moves in the direction in which the diameter of the pin 13B in the right direction in the drawing is small. The moved scribing wheel 12A moves to a position in contact with the side surface of the holder groove 14 as shown in FIG. 10, and continues to form a scribe line.

  Also in this example, since the position of the scribing wheel 12A in the holder groove 14 is stabilized, there is no left-right shaking with respect to the traveling direction of the scribing wheel 12A, and the position of the formed scribe line is stabilized.

(Embodiment)
A chip holder according to an embodiment of the present invention will be described with reference to FIGS. The configuration of the scribe head according to the present embodiment is the same as that of the first reference example. FIG. 11 is a front view showing the configuration of the tip holder 10C according to the present embodiment. The chip holder 10C includes a holder 11C, a scribing wheel 12B, and a pin 13C. The same components as those used in the first reference example are denoted by the same reference numerals.

  The structure of the holder 11C is substantially the same as the holder 11A of the first reference example, and has a holder groove 14 and a pin hole 15C. The pin hole 15C is a circular through hole similar to the pin hole 15A of the first reference example, but is displaced upward in the Y-axis direction from the left side to the right side in the drawing. As a result, of the two openings on the surface of the holder 11C, the opening on the right side of the drawing is displaced upward in the Y-axis direction compared to the opening on the left side of the drawing. The pin hole 15C has a step portion in the vicinity of one of the two openings, like the pin hole 15A of the first reference example.

  The pin 13C has the same shape as the pin 13A of the first reference example, but the surface does not have a spiral groove and is smooth as shown in FIG.

  The scribing wheel 12B has the same configuration as the scribing wheel 12A of the first reference example, but has a through hole having a diameter larger than that of the scribing wheel 12A. With this through hole, the scribing wheel 12B can hold the scribing wheel in a rotatable manner even when the pin 13C, which is inclined with respect to the X-axis direction, passes through the through hole.

  A chip holder 10C is configured using the holder 11C, the scribing wheel 12B, and the pin 13C. The scribing wheel 12B is held in the holder groove 14, and the pin 13C is inserted into the pin hole 15C and the through hole of the scribing wheel 12B from a portion having a pointed shape. The pin 13C is fixed to the pin hole 15C where the pointed portion of the pin 13C is in contact with the step near the opening of the pin hole 15C. Thus, the scribing wheel 12B is rotatably held by the pin 13C, and the chip holder 10C shown in FIG. 11 is configured.

  When the tip holder 10C is attached to the holder joint, fixed to the scribe head, and the tip holder 10C is moved relative to the brittle material substrate while the scribing wheel 12B of the tip holder 10C is brought into contact with the brittle material substrate, the scribing wheel 12B is obtained. Moves relative to the brittle material substrate while rotating in accordance with the movement of the chip holder 10C, and a scribe line is formed on the brittle material substrate. At this time, the rotating scribing wheel 12B moves upward in the Y-axis direction along the pin 13C. The moved scribing wheel 12B moves to the right in the drawing until it comes into contact with the side surface of the holder groove 14 as shown in FIG. 13, and continues to form a scribe line.

  Also in the present embodiment, since the position of the scribing wheel 12B in the holder groove 14 is stabilized, there is no left-right shake with respect to the traveling direction of the scribing wheel 12B, and the position of the formed scribe line is stabilized.

(Third reference example)
A chip holder according to a third reference example of the present invention will be described with reference to FIGS. The configuration of the scribe head according to the present embodiment is the same as that of the first reference example. The chip holder 10D has a holder 11A, a scribing wheel 12C, and a pin 13C. The same components as those used in the present embodiment, such as the holder 11A and the pin 13C, are denoted by the same reference numerals.

  The scribing wheel 12C is a member formed of, for example, cemented carbide or sintered diamond. The scribing wheel 12C has a shape in which two truncated cones having congruent bottom surfaces and different heights are overlapped on the bottom surface, two circular side surfaces 12a and 12b facing each other, and a curved surface that is a side surface of the truncated cone. 12c and 12d. The side surfaces 12a and 12b have a through hole penetrating the center. The curved surfaces 12c and 12d form a V-shaped blade, and the ridgeline of the blade edge is formed at the tangent line of the curved surfaces 12c and 12d. As shown in FIG. 14, the ridge line is formed near the side surface 12a, not in the middle of the thickness direction of the scribing wheel 12C.

  FIG. 15 is an enlarged cross-sectional view of the scribing wheel 12C when cut along a plane passing through the central axis of the through holes of the side surfaces 12a and 12b. FIG. 15 shows the curved surfaces 12c and 12d and the through holes. A broken line is a ridge line hidden behind the page. The broken line in FIG. 15 coincides with the position of a plane including a ridge line (not shown, hereinafter referred to as a ridge line surface). An angle with respect to the ridgeline plane of a line perpendicular to the ridgeline plane, that is, a line formed between the plane parallel to the paper surface of FIG. In addition, an angle with respect to the ridge line surface of a line formed at a portion where the surface parallel to the paper surface of FIG. The scribing wheel 12C is configured such that the angle θ1 and the angle θ2 are equal.

  In addition, since the line | wire which can be made into the part where the surface perpendicular | vertical to a ridgeline surface and the curved surfaces 12c and 12d cross is linear at least at the intersection part with a ridgeline surface, angle (theta) 1 and angle (theta) 2 can be defined.

  A chip holder 10D is configured using the holder 11A, the scribing wheel 12C, and the pin 13C. The scribing wheel 12C is inserted and held in the holder groove 14, and the pin 13C is inserted into the pin hole 15A and the through hole of the scribing wheel 12C from the portion having the pointed shape. The pin 13 </ b> C is fixed to the pin hole 15 </ b> A at a point where the peak portion contacts a step portion near the opening of the pin hole 15 </ b> A. As a result, the scribing wheel 12C is rotatably held by the pin 13C, and the chip holder 10D shown in FIG. 14 is configured.

When the tip holder 10D is attached to the holder joint and fixed to the scribe head, and the tip holder 10D is moved relative to the brittle material substrate while the scribing wheel 12C of the tip holder 10D is brought into contact with the brittle material substrate, the scribing wheel 12C is obtained. Moves relative to the brittle material substrate while rotating in accordance with the movement of the chip holder 10D, and a scribe line is formed on the brittle material substrate. At this time, the rotating scribing wheel 12 </ b> C moves along the pin 13 </ b> C toward the side surface close to the ridge line because the edge line of the cutting edge is not in the middle of the thickness direction. As shown in FIG. 16, the moved scribing wheel 12C moves in the direction of the right side surface 12a in the drawing until it contacts the side surface of the holder groove 14, and continues to form a scribe line.

  Since the position of the scribing wheel 12C in the holder groove 14 is stabilized, there is no left-right shake with respect to the traveling direction of the scribing wheel 12C, and the position of the formed scribe line is stabilized.

  A first modification of the scribing wheel 12C will be described. FIG. 17A is an enlarged view showing the scribing wheel 12D as the first modification. The scribing wheel 12D is a member formed of, for example, cemented carbide or sintered diamond. The scribing wheel 12D has a shape in which two truncated cones having congruent bottom surfaces and equal heights are overlapped on the bottom surface, and are two opposite circular side surfaces 12e and 12f and a side surface of the truncated cone. It has curved surfaces 12g and 12h. The side surfaces 12e and 12f have a cylindrical through hole at the center. The curved surfaces 12g and 12h form a V-shaped blade, and the edge of the blade edge is formed at the tangent line of the curved surfaces 12g and 12h. This ridgeline is formed in the middle of the scribing wheel 12D in the thickness direction as shown in FIG.

  FIG. 17B is an enlarged cross-sectional view of the scribing wheel 12D taken along a plane that passes through the central axis of the through holes of the side surfaces 12e and 12f. FIG. 17B shows the curved surfaces 12g and 12h and the through holes. A broken line is a ridge line hidden behind the page. The broken line in FIG. 17 (b) coincides with the position of the ridge line surface (not shown), and two lines formed at the intersection of the surface perpendicular to the ridge line surface and the curved surfaces 12g and 12h with respect to the ridge line surface. The angles are defined as angles θ3 and θ4, respectively. The scribing wheel 12D is configured such that the angle θ3 and the angle θ4 are different. In FIG. 17B, θ3 <θ4, and the angle θ3 and the angle θ4 are, for example, an angle θ3 of 45 ° to 65 ° (for example, 55 °) and an angle θ4 of 55 ° to 75 ° (for example, 65 °).

  Even when the scribing wheel 12D is used in place of the scribing wheel 12C when forming the scribe line, the scribing wheel 12D moves in the direction of the side surface 12e on the right side of the drawing along the pin 13C, so the same effect as the scribing wheel 12C. Can be obtained.

  A second modification of the scribing wheel 12C will be described. FIG. 18A is an enlarged view of a scribing wheel 12E that is a second modification. The scribing wheel 12E is a member formed of, for example, cemented carbide or sintered diamond. The scribing wheel 12E has a shape in which two truncated cones having congruent bottom surfaces and different heights are overlapped on the bottom surface, two opposing circular side surfaces 12i and 12j, and a side surface of the truncated cone. It has curved surfaces 12k and 12l. The side surfaces 12i and 12j have a cylindrical through hole at the center. The curved surfaces 12k and 12l form a V-shaped blade, and the ridgeline of the blade edge is formed at the tangent line of the curved surfaces 12k and 12l. As shown in FIG. 18, the ridge line is formed near the side surface 12i, not in the middle of the thickness direction of the scribing wheel 12E.

  FIG. 18B is an enlarged cross-sectional view showing a cross section when the scribing wheel 12E is cut along a plane passing through the central axis of the through holes of the side surfaces 12i and 12j. FIG. 18B shows the curved surfaces 12k and 12l and the through holes. A broken line is a ridge line hidden behind the page. The broken line in FIG. 18 (b) coincides with the position of the ridge line surface (not shown), and two lines formed at the intersection of the surface perpendicular to the ridge line surface and the curved surfaces 12k and 12l with respect to the ridge line surface. The angles are defined as angles θ5 and θ6, respectively. The scribing wheel 12E is configured such that the angle θ5 and the angle θ6 are different. In FIG. 18B, θ5 <θ6. As for the angle θ5 and the angle θ6, for example, the angle θ5 can be set to 45 ° to 65 ° (for example, 55 °), and the angle θ6 can be set to 55 ° to 75 ° (for example, 65 °).

  Even when the scribing wheel 12E is used in place of the scribing wheel 12C when forming the scribe line, the scribing wheel 12E moves in the direction of the side surface 12i on the right side of the drawing along the pin 13C, and thus the same effect as the scribing wheel 12C. Can be obtained.

  A spiral groove like the pin 13A of the first reference example may be formed on the inner walls of the through holes of the scribing wheels 12C to 12E. Accordingly, the scribing wheels 12C to 12E can be reliably moved to a position where they contact the side surface of the holder groove 14.

  Further, the pin 13A of the first reference example may be used instead of the pin 13C having a smooth surface. Accordingly, the scribing wheels 12C to 12E can be reliably moved to a position where they contact the side surface of the holder groove 14.

  It goes without saying that the thickness of the scribing wheel and the width of the holder groove exemplified here are not limited to this example and can be arbitrarily selected.

  The chip holder is not limited to an automatic scribing device that automatically scribes the brittle material substrate, but can also be used by being attached to a brittle material cutting cutter that manually cuts the 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 Scribe head 10A-10D Chip holder 11A-11C Holder 12a, 12b, 12e, 12f, 12i, 12j Side surface 12c, 12d, 12g, 12h, 12k, 12l Curved surface 12A-12E Scribing wheel 13A-13C Pin 14 Holder groove 15A- 15C Pin hole 20 Holder joint

Claims (2)

A holder groove for inserting a scribing wheel in a lower part, a holder groove forming part separated by the holder groove , and a holder having a circular pin hole linearly and coaxially passing through the holder groove forming part ,
The holder groove is provided perpendicular to the lower surface of the tip holder, the tip holder formed inclined from the vertical axis of the pin holes with respect to the holder groove. A holder groove for inserting a scribing wheel in a lower part, a holder groove forming part separated by the holder groove , and a holder having a circular pin hole linearly and coaxially passing through the holder groove forming part ,
The holder groove is provided perpendicular to the lower surface of the chip holder, the shaft of the pin holes are formed inclined from the vertical with respect to the holder groove, the scribing wheel holder groove by rotation of the scribing wheel A tip holder that moves and contacts one side.

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