JP2003212578A - Scribing head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that a large chipping is occurred on the edge part of a substrate according to a deflection angle because a chip holder is swingable in a conventional scribe head and the deviation of scribing is occurred between a forward path and a backward path because the holder is inversely turned on the backward path. <P>SOLUTION: In this scribing head, a bearing case 13 is vertically supported, a spring 20 is interposed between a rod shaft 18 of a cylinder 17 and the bearing case 13, the shaft center of the rod shaft 18 is made to coincide with the rotation center of a cutter wheel 1 on the perpendicular line and the direction of the chip holder 2 is fixed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scribing head provided with a chip holder that rotatably holds a cutter wheel that forms a scribing line on a brittle material substrate.

[0002]

2. Description of the Related Art FIG. 1 shows the structure of a conventional scribing head. Bearings so that the tip holder 2 that holds the cutter wheel 1 rotatably can swing to the left and right (in the direction perpendicular to the paper surface in the figure) with respect to the traveling direction of the scribe head (the direction of the arrow in the figure). It is attached to the holder holding base 3 via 4. The holder holder 3 itself is urged downward by the spring 5 via the piston 6, and the air having a predetermined cutting pressure is supplied from the upper portion, so that the piston 6 applies a predetermined load to the holder holder 3. Added to.

Further, the holder holder 3 itself is reciprocally cut, so that the motor 8 is driven through the belt 7 so that
° It is possible to change direction. The center of rotation of the cutter wheel 1 and the center of rotation of the tip holder 2 that can be swung are deviated (axis misalignment). As shown in this figure, when scribing in the right direction (arrow direction), the center of rotation of the cutter wheel 1 Is located behind the center of rotation of the chip holder 2.

[0004]

In the conventional scribing head, the holder is held by the sliding resistance of the piston that applies a load to the holder holding base 3 and the resistance of the rotary shaft 9 for raising and lowering the holder holding base 3. The rotating motion of the base 3 is not smooth, and the spring 5 biases the holder holding base 3 via the piston 6, so that the responsiveness to the displacement originally possessed by the spring is hindered and the scribe speed is increased. When the value exceeds 500 mm / s, the cutter wheel cannot follow the fine irregularities and undulations on the surface of the glass substrate to scribe, and it is often the case that an accurate scribe line cannot be formed on the glass substrate (cutting line skipping). Was.

Further, in the conventional scribing head, the structure of the scribing head has been complicated by using a timing belt, a high rotor, etc. for reversing the holder holding base on the return path at the time of reciprocating scribing. Further, since the assembling dimensional accuracy of the scribing head itself is not zero, the scribing lines do not coincide with each other when scribing on the outward path and the returning path, and therefore the deviation is caused by, for example, the chip holder 2.
It is necessary to add an adjusting mechanism to the mechanically, or to electrically correct the position of the scribe table by a motor in order to change the scribe position, which complicates the mechanism of the scribe device.

Further, in the conventional scribing head, the swinging angle of the chip holder is set to about ± 2 ° with respect to the forming direction of the scribing line to enhance the followability in the traveling direction of the scribing head. However, during scribing on the substrate, due to the swing of the chip holder, a large chip was formed on the end face portion of the substrate when the cutter wheel climbed onto the substrate.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a scribe head which can solve the above-mentioned problems with a simple mechanism.

[0008]

SUMMARY OF THE INVENTION The present invention is a scribe head having a chip holder for holding a cutter wheel, which is movably provided in a direction perpendicular to the surface of a workpiece to be machined and holds the chip holder. The cutter wheel is provided with a holding means and a second urging means interposed between the shaft of the first urging means for generating a predetermined cutting pressure and the first holding means. It is characterized in that the center and the moving direction of the axis center of the shaft of the first urging means are positioned on the same straight line.

[0009]

2 is a front view (left) and a side view of a scribe head 10 showing one embodiment of the present invention.
(Right). The bearing case 13 that holds the holder mounting shaft 22 at the bottom is connected to the main body side plate 1 through the connection plate 14.
By engaging the linear way 16 on the fifth side, it is possible to move in the vertical direction. The holder holding shaft 22 is press-fitted into the bearing in the bearing case 13 and rotatably held, but the two screws 23 and the two nuts 24 cause the holder holding shaft to move in the direction of the cutting edge of the cutter wheel 1 along the scribe line. It is fixed to match the forming direction.

In recent years, the accuracy of the straight movement of the main body side plate 15 has become very high due to the improvement of the machining accuracy. Even if the direction of the chip holder 2 is finely adjusted to match and the chip holder 2 is fixed and scribed, the scribe line formed on the surface of the brittle material substrate is comparable to the scribe line formed by the conventional scribe head. It is now possible to obtain quality that does not exist.

A spring 20, for example, is mounted between the rod shaft 18 of the air cylinder 17 fixed to the upper portion of the main body side plate 15 and the convex portion 19 provided on the upper portion of the bearing case 13 to supply air to the cylinder 17. The pressure causes the spring 20 to displace and contract, urging the bearing case 13, and a predetermined blade edge load is applied to the cutter wheel 1 via the holder holding shaft 22 and the tip holder 2.

Further, although the pressurization by the air cylinder 17 is used for the displacement of the spring 20, a linear motion mechanism adopting a motor and a ball screw for the displacement of the spring 20 may be used.

The holder holding shaft 22 press-fitted into the bearing of the bearing case 13 is finely adjusted by the two screws 23 and the two nuts 24 after the mounting angle is finely adjusted, and then fixed, and mounted on the holder holding shaft 22. It does not swing itself, but is fixed so as to match the moving direction of the main body side plate 15. Further, since the chip holder 2 can be fixed as described above by the recent improvement of the parts processing technique, in the scribe head 10 of FIG. 2 which is an example of the present embodiment, the central axis of the rod shaft 18 and the cutter wheel 1 are provided. The center of rotation of is aligned vertically.

By adopting the above-mentioned mechanism, reciprocating scribing can be realized without using a rotating mechanism such as a timing belt or a motor, and there is almost no deviation of the scribe line formed on the return path and the outward path. Further, the tip holder 2 is fixed and the rod shaft 18 of the air cylinder 17 is fixed.
By interposing the spring 20 in a straight line connecting the central axis of the and the rotation center of the cutter wheel 1, the followability in the vertical direction of the chip holder 2 is significantly improved as compared with the conventional scribing head, and the brittle material substrate It follows irregularities and undulations on the surface without jumping, and eliminates cut line skips that occur when scribe lines intersect. Further, when the cutter wheel 1 rides on the brittle material substrate, the tip holder 2 swings to zero, and the spring 2 is provided directly above the rotation axis of the cutter wheel 1.
Since 0 is present to absorb the impact, the chip formed on the end face of the brittle material substrate can be made extremely small.

An example of processing by the scribe head 10 having the above structure will be described below. Processing data Blade shape: φ2.5 × 0.65 × 0.8 (made of cemented carbide) Glass material: Soda glass Glass thickness: 1.1 mm

The following table shows the size of the chip (μm) at the glass end face when scribing with the above-mentioned processing data in the scribing head 10 shown in FIG. 2 which is an example of this embodiment. The conventional example given for comparison shows the size (μm) of the chip of the glass end surface when scribing with the above processing data using a scribing head with a tip holder swinging angle of ± 2 °. It is a thing. or,
The state of chipping at that time is shown in FIG. 3 (A) as a conventional example and in the photograph of (B) as an example of the present invention. Here, the line in the vertical direction indicates the glass end face, "width" is the length of the vertical chip in FIG. 3, and "length" is the length of the horizontal chip.

[0017]

[Table 1]

Thus, the tip holder is fixed so that the direction of the cutting edge of the cutter wheel 1 held by the tip holder 2 coincides with the scribe direction, and the rod shaft 18 of the air cylinder 17 and the cutter wheel 1 are fixed. Since the impact force is better absorbed by interposing a spring in a straight line connecting the rotating shafts, the area of the chip formed on the glass end face when the cutter wheel 1 rides on the surface of the glass at the start of scribing is reduced. It became extremely small.

FIG. 4 is an example of a scribing head showing another embodiment of the present invention, and shows a front view (left) and a side view (right) of the scribing head 30. The holder holding plate 42 that holds the lower chip holder 2 is movable in the vertical direction by engaging with the linear way 36 on the body side plate 35 side. The surface of the holder holding plate 42 to which the chip holder 2 is attached is precisely processed to match the moving direction of the main body side plate 35, and is assembled with high precision. Therefore, the chip holder 2 is fixed so that the direction of the cutting edge of the cutter wheel 1 matches the forming direction of the scribe line. Further, the center axis of the rod shaft 18 of the air cylinder 17 and the rotation center of the cutter wheel 1 are aligned vertically.

A spring 40, for example, is mounted between the rod shaft 18 of the air cylinder 17 fixed to the upper part of the main body side plate 35 and the convex portion 39 provided on the upper part of the holder holding plate 42 to supply the air to the cylinder 17. Due to the air pressure, the spring 40 is displaced and contracts, urges the holder holding plate 42, and a predetermined blade edge load is applied to the cutter wheel 1 via the tip holder 2.

Further, although the pressurization by the air cylinder 17 is used for the displacement of the spring 40, the linear motion mechanism may employ a motor and a ball screw for the displacement of the spring 40.

Then, except for the chip holder 2, the main body of the scribe heads 10 and 30 is covered with a dustproof cover (not shown). Then, the compressed powder is introduced into the cover to prevent the processed powder from entering the inside of the scribe head.

[0023]

As described above, according to the present invention, the bearing case or the holder holding plate is supported so as to be vertically movable, and a spring is interposed between the rod shaft of the air cylinder and the bearing case or the holder holding plate. By aligning the axis of the rod axis with the center of rotation of the cutter wheel on a vertical line and fixing the orientation of the chip holder, the orientation of the cutter wheel always matches the scribe direction when riding on the substrate, and the spring Since the impact force is efficiently absorbed, the occurrence of chipping is small,
In addition, since the cutter wheel does not change direction during the forward and backward scribing, the scribing position does not shift,
The mechanism is also simplified.

[Brief description of drawings]

FIG. 1 is a front view of a conventional scribing head.

FIG. 2 is a front view and a side view of a scribing head showing an embodiment of the present invention.

FIG. 3 is a diagram showing a chip at the end face of glass when scribing.

FIG. 4 is a front view and a side view of a scribing head showing another embodiment of the present invention.

[Explanation of symbols]

1 cutter wheel 2 chip holder 10, 30 scribe head 13 Bearing case 14 Connection plate 15, 35 Body side plate 16, 36 Linear way 17 Air cylinder 18 Rod axis 20, 40 spring 22 Holder holding shaft 23 screws 24 nuts 42 Holder holding plate

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3C069 AA03 BA04 BB03 BC01 CA06                       EA01 EA02 EA05                 4G015 FA03 FB01 FC01 FC07 FC14

Claims (5)

[Claims] 1. A scribing head having a chip holder for holding a cutter wheel, wherein the scribing head is provided so as to be movable in a direction perpendicular to a surface of a workpiece to be machined and holds the chip holder, and a predetermined cutting pressure. A second urging means interposed between the shaft of the first urging means and the first holding means for generating the rotation force of the cutter wheel and the first urging means. A scribing head having a structure in which the axis of the means is located on the same straight line as the moving direction of the axis center. 2. The scribing head according to claim 1, wherein the first holding means is a bearing case. 3. The scribe head according to claim 1, wherein the first holding means is a holder holding plate. 4. The scribe head according to claim 1, further comprising a dustproof cover. 5. The scribe head according to claim 1, wherein the second biasing means is a spring.