JP2000219525A - Method and device for perforating deformed hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for perforating a deformed hole, by which the deformed hole can smoothly be perforated without requiring so much time when a deformed hole is perforated in a work such as glass plate, and also to provide a device for the method. SOLUTION: In the side-view of a perforating cutting-edge section of this device, shown in the figure, a band saw 1 consisting of an endless band material 2 which is made of stainless steel, Swedish steel, or the like, and at one side edge of which a cutting-edge part 3 is formed by electrodepositing diamond abrasive grains on the band material 2 at prescribed intervals so that the band saw 1 can easily be bent, is held with plural rotary shafts 4, wherein each of the rotary shafts 4 supports the belt material 2 of the band saw 1, up to its intermediate part preceding the cutting-edge part 3 and is not engaged with the cutting-edge part 3. Thus, the whole cutting-edge part 3 can be pressed on a glass plate 7 which is a work and, accordingly, this band saw 1 can be held with the plural rotary shafts 4 to form the shape of a hole to be perforated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for drilling. More specifically, the present invention relates to a method and an apparatus for drilling a hard brittle material, mainly a glass plate or the like, into a workpiece such as an ellipse other than a perfect circle or any other shape.

[0002]

2. Description of the Related Art When mounting a high-mount stop lamp or the like on a rear glass of an automobile, it is conceivable to form an oval hole in a glass plate and mount the stop lamp in the oval hole. Conventionally, when drilling an irregularly shaped hole such as an ellipse in such a hard and brittle material such as a glass plate, the work is first penetrated using a drill provided with a diamond grindstone portion. The drill is pressed against the side wall of the formed hole while penetrating the hole, and the hole is ground and expanded with a diamond grindstone or the like provided on the shaft portion of the drill. An arbitrary shaped hole is formed in the workpiece. Thereafter, the perforated section is chamfered with a chamfering drill. As a result, irregular holes can be formed in a hard brittle material such as a glass plate.

[0003]

However, the conventional method of drilling a hole in a glass plate using a drill and grinding and expanding the hole requires a lot of time.

On the other hand, there is known an apparatus for cutting a glass plate using a band saw having a blade portion on one side edge of an endless strip. In this apparatus, a band saw is wound around two rotating shafts, held, the band saw is rotated, and a glass plate is pressed against a straight portion of the band saw between two shafts at both ends to cut the band saw. Using such a band saw, a workpiece made of a hard and brittle material such as a glass plate can be cut. Such a band saw cuts a glass plate or the like linearly and has not been used for drilling.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned prior art, and provides a method and apparatus for forming a deformed hole in a workpiece such as a glass plate so that the hole can be smoothly formed without time. For the purpose of providing.

[0006]

According to the present invention, in order to achieve the above object, a band saw having a blade portion on one side edge of an endless band material is used, and a perforated shape is formed by the band saw. A deformed drilling method characterized in that the entire blade portion of the band saw is pressed against a workpiece and drilled while being held through a plurality of rotating shafts.

According to this configuration, the shape of the band saw is
The work piece is formed into the shape to be drilled, and the band saw is pressed as it is to penetrate the work piece. Irregular holes can be formed.

In a preferred configuration example, after forming a hole with the band saw, chamfering is performed on edges on both sides of the hole in the direction in which the hole penetrates.

According to this configuration, after a hole is formed in a workpiece with a band saw, the material can be practically used by chamfering.

According to the present invention, in order to carry out the above-described method of the present invention, a band saw having a blade portion on one side edge of an endless band material, and holding the band saw with the band saw formed in a perforated shape. And a plurality of rotary shafts, the rotary shaft holding the band saw so that the entire blade portion of the band saw can be pressed against a workpiece.

According to this configuration, the entire blade portion of the band saw is held by the shaft so as to be able to be pressed against the work, and the shape of the band saw can be changed by the shaft. Can be opened.

In a preferred embodiment, at least one of the rotary shafts is connected to a drive motor to form a drive shaft, and a claw is provided on the drive shaft, and a plurality of feed claw holes are engaged with the claw. Is continuously formed on the band portion of the band saw.

According to this structure, the claw provided on the drive shaft and the claw hole provided on the band saw are engaged with each other, so that the band saw is prevented from slipping in the rotational direction, and the rotational force of the drive shaft is reliably transmitted to the band saw. You.

In a preferred embodiment, the rotary shaft has a stopper for preventing the band saw from sliding in the axial direction when the band saw is pressed against the workpiece.

According to this configuration, the stopper is provided on the shaft to prevent the band saw from sliding in the axial direction due to the pressing of the band saw against the workpiece. , And the pressing force acts on the workpiece without fail.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view of a drilling cutting blade portion of a modified drilling device according to an embodiment of the present invention. The band saw 1 has a blade 3 formed on one side edge of an endless band 2 made of stainless steel or Swedish steel or the like. The blade 3 is formed by electrodepositing diamond abrasive grains on the band 2 of the band saw 1. In this case, the blade 3
Is electrodeposited at a predetermined interval so that the band saw 1 is easily bent. The band saw 1 is held by a plurality of rotating shafts 4.

In this case, each rotating shaft 4 supports the band member 2 of the band saw 1 up to an intermediate portion in front of the blade portion 3 and does not engage with the blade portion 3. Thereby, the whole blade part 3 can be pressed against the glass plate 7 which is a workpiece. Therefore,
The band saw 1 can be held by a plurality of rotating shafts 4 to form a shape to be drilled.

At least one rotary shaft is connected to a drive motor (not shown) and has a claw 8. The band member 2 of the band saw 1 has a plurality of claw holes 5 with which the claws 8 are engaged. Since the pawl 4 engages with the pawl hole 5 and rotates, when the rotating shaft is rotated, the band saw 1 is prevented from slipping in the rotational direction. For this reason, the rotational force of the rotating shaft 4 is reliably transmitted to the band saw 1.

The rotary shaft 4 is further provided with a stopper 6 for preventing the band saw 1 from sliding in the axial direction. The stopper 6 does not slip in the axial direction even when the band saw 1 is pressed against the glass plate 7 as a workpiece, and the pressing force surely acts on the glass plate 7.

FIG. 2 is a view showing an example of a perforated shape of the modified perforated apparatus according to the present invention. (A) is an example in which a band saw is held by four rotating shafts to form a square perforated shape. (B) is an example in which a band saw is held by two rotating shafts and an oval perforated shape is formed. In addition, by changing the number of rotating shafts 4,
Pentagons and other shapes can be formed.

Alternatively, the band saw 1 can be formed to be depressed inward by pressing the rotating shaft 4 from the outside of the band saw 1. Furthermore, a guide member curved with the rotating shaft is appropriately arranged inside or outside the band saw,
By running the band saw 1 along this guide member, an arbitrary perforated shape can be formed.

FIG. 3 is a layout view of the whole irregular-shaped drilling apparatus according to the present invention, FIG. 4 is a side view of the drilling stage, and FIG. 5 is a side view of the chamfering stage. The modified drilling apparatus according to the present invention includes a drilling stage 30 provided along the main body 10 and a chamfering stage 31, and performs chamfering after drilling a workpiece. In this case, the workpiece may be conveyed from the drilling stage 30 to the chamfering stage 31 after the drilling, or the drilling stage 30 and the chamfering stage 31 may be moved to the main body 10 with respect to the workpiece set at a certain processing position. May be configured to be movable along.

In this example, the band saw 1 is held from the inside by six rotating shafts 4 to form a hexagonal perforated shape. Each rotating shaft 4 is rotated by a drive motor 29 connected to one of the six rotating shafts 4. The drive motor 29 is provided inside the head 9 (FIG. 4), and is connected to the main body 10. The head 9 can be moved up and down as shown by the arrow in FIG. 4. By lowering the head 9, the band saw 1 is lowered to perforate the glass plate 7. The glass plate 7 is positioned and fixedly held on a suction table 33 provided on a bed 32 by vacuum suction means. The suction table 33 can move between the perforated stage 30 and the chamfering stage 31 while holding the glass plate 7.

The glass plate after the perforation process is subjected to chamfering at a chamfering stage 31. By performing this chamfering, the perforated glass plate can be used practically. As shown in FIG. 5, a chamfering drill 11 having a diamond metal bond grindstone is rotated by a chamfering drill drive motor 12 to chamfer a hole (not shown) formed in the glass plate 7. The drill 11 has, for example, slanted upper and lower polishing surfaces extending outwardly in a V-shaped cross section for chamfering the edges of the holes on both surfaces of the glass plate 7, thereby polishing the corners on both sides of the holes.

The positioning of the chamfering drill on the perforated portion of the glass plate is performed as shown by the arrow in FIG.
Is moved down to a perforated portion of the glass plate 7 by a chamfering L-axis (vertical axis) motor 15 for vertically moving the
3 and the chamfering Y-axis 14 attached to the main body 10 are operated to chamfer the corner of the perforated portion of the glass plate 7. In this case, the X-axis 13 and the Y-axis 14 are driven based on the XY coordinate data of the hole shape inputted in advance, and the drill 11 is moved along the inner edge of the hole by automatic control to perform chamfering.

Further, instead of the chamfering drill 11, an inner surface of the hole is ground by using a side surface polishing drill provided with abrasive grains on the side surface of the drill shaft, and an accurate hole shape is formed based on the XY coordinate data. Is also good. In this case, the hole formed by the band saw is a hole slightly smaller than the hole of the final shape, and this hole is polished with a drill and slightly widened to form a hole of a desired shape. Further, by polishing the inner wall surface of such a hole, it becomes possible to finish the perforated portion of the glass plate 7 together with the chamfering.

FIG. 6 is a schematic sectional configuration diagram of a drilling device according to the present invention, and FIG. 7 is a top view thereof. Two LMs
A drive motor 29 is fixed by bolts 19 to a slide plate 18 that slides up and down along the guide 17 (FIG. 7).
The slide plate 18 is mounted on the screw shaft 16 via a nut member 25.
6 is driven up and down by rotating.

The drive shaft 22, which is the output shaft of the drive motor 29, is connected to one of a plurality of rotation shafts holding the perforated band saw 1 via a belt 26 as described above, and connects the drive rotation shaft 4a. Constitute. The driving rotary shaft 4a is further connected to another rotary shaft 4 via a belt 26. As a result, all the rotating shafts 4 are rotationally driven by the drive motor 29, and a reliable feed driving force for the band saw 1 is obtained. Each rotating shaft 4 is rotatably supported by upper and lower two support plates 20 fixed to the slide plate 18 via bearings 27.

FIG. 8A is a plan view showing a state in which a rotary shaft is attached to a support plate, and FIGS. 8B and 8C are a plan view and a longitudinal sectional view of the rotary shaft portion, respectively. The support plate 20 is made of a perforated plate having a large number of small-diameter holes 21 formed therein to reduce the weight. On this support plate 20,
In this example, four rotary shafts 4 are penetrated and mounted via bearings 27 so that the drive shaft 22 is penetrated and the band saw 1 has a desired perforated shape. The penetrating portion of the rotating shaft 4 allows each rotating shaft to apply an appropriate tension to the band saw from the inside, securely hold and rotate the band saw by the tension, and make the band saw 1 have an accurate perforated shape. Therefore, the structure is such that the position of the rotating shaft 4 can be finely adjusted as follows.

The rotary shaft 4 is held by a bearing 27, and a rectangular frame 23 is provided around the housing of the bearing 27. The frame 23 is provided on the base 40 together with the bearing 27. The pedestal 40 is passed through a plurality of (two in this example) mounting holes 42 and bolts 41 (FIG. 8).
(C) is attached to the support plate 20 by (C). Rectangular frame 2
Each of the three sides is provided with two screws 24. Each screw 24 has a length that can be adjusted by contacting the outer surface of the housing of the bearing 27. Each such screw 24
The fine adjustment of each rotating shaft 4 becomes possible through the bearing 27 by adjusting the screwing amount of the shaft. Thereby, an appropriate tension can be applied to the band saw and a desired perforated shape can be accurately formed.

[0031]

As described above, according to the present invention, the shape of the band saw is formed into a shape to be drilled on the workpiece, and the band saw is pressed as it is to penetrate the workpiece. After the dawn, the workpiece is no longer ground and expanded, and the irregular shaped hole can be efficiently formed in a short time.

[Brief description of the drawings]

FIG. 1 is a side view of a cutting blade portion for drilling of a variant drilling device according to an embodiment of the present invention.

FIG. 2 is a view showing an example of a perforated shape of the modified perforation apparatus according to the present invention.

FIG. 3 is a layout view of the whole modified drilling device according to the present invention.

FIG. 4 is a side view of a drilling stage.

FIG. 5 is a side view of the chamfering stage.

FIG. 6 is a schematic sectional configuration diagram of a drilling device according to the present invention.

FIG. 7 is a schematic top configuration diagram of a main part of the drilling device of FIG. 6;

8A is a plan view showing a state in which a rotary shaft is mounted on a pedestal, and FIGS. 8B and 8C are a plan view and a longitudinal sectional view of the rotary shaft portion, respectively.

[Explanation of symbols]

1: band saw, 2: band material, 3: blade portion, 4: rotating shaft, 5: claw hole, 6: stopper, 7: glass plate, 8: claw,
9: head, 10: main body, 11: chamfering drill, 1
2: Chamfer drill drive motor, 13: Chamfer X axis, 1
4: chamfered Y-axis, 15: chamfered L-axis motor, 16: shaft, 17: LM guide, 18: slide member, 19:
Bolt, 20: support plate, 21: small hole, 22: drive shaft, 23: frame, 24: screw, 25: nut member, 2
6: belt, 27: bearing, 29: drive motor, 3
0: hole drilling stage, 31: chamfering stage, 32: bed, 33: suction table, 40: pedestal, 41: bolt, 42:
Mounting holes.

Claims (5)

[Claims] 1. A band saw having a blade portion on one side edge of an endless band material, a perforated shape is formed by the band saw, and the perforated shape is held through a plurality of rotating shafts. A deformed drilling method characterized in that the entire blade portion is pressed against a workpiece to perform drilling. 2. The deformed hole drilling method according to claim 1, further comprising, after forming a hole with the band saw, chamfering edges on both sides of the hole in a direction in which the hole penetrates. 3. A band saw having a blade on one side edge of an endless band material, and a plurality of rotating shafts holding the band saw in a state where a perforated shape is formed by the band saw, wherein the rotating shaft comprises: A deformed drilling device characterized in that the entire blade portion of the band saw holds the band saw so that the band saw can be pressed against a workpiece. 4. A drive shaft is formed by connecting at least one of the rotary shafts to a drive motor, a pawl is provided on the drive shaft, and a plurality of feed pawl holes with which the pawls are engaged are continuously formed. 4. The modified drilling device according to claim 3, wherein the modified drilling device is formed on a band portion of the band saw. 5. The rotary shaft according to claim 3, wherein the rotary shaft has a stopper for preventing the band saw from sliding in the axial direction when the band saw is pressed against the workpiece.
A modified drilling device according to claim 1.