JPH11343134A - Method and apparatus for cutting quartz glass tube - Google Patents

Abstract

(57) [Problem] To provide a method for cutting a quartz glass tube without imposing a burden on an operator. SOLUTION: A cutting blade portion of a cutter 1 is made of a quartz glass tube 3.
(3) In the method of cutting a quartz glass tube by pressing against the outer periphery, the glass tube 33 is rotated in the outer peripheral direction of the glass tube while being mounted on the quartz glass tube mounting table 2, and the length of the glass tube is reduced. In a direction intersecting with the direction, in a state where the cutting blade portion is lowered by a predetermined depth from the outer periphery of the glass tube, a load is pressed from a cut surface of the glass tube to one surface of the cutting blade portion. I do.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quartz glass tube cutting method and apparatus for cutting a quartz glass tube with a cutter.

[0002]

2. Description of the Related Art Conventionally, when a quartz glass tube is cut, a diamond blade is lowered while the quartz glass tube is rotated in the outer peripheral direction. At this time, FIG.
As shown in (a), the quartz glass tube 105 is mounted on the glass tube rotating roller 103 of the quartz glass tube mounting table 106, and is automatically rotated in the outer circumferential direction to rotate the blade 102.
8, the quartz glass tube 105 is displaced in the longitudinal direction due to the bending of the outer peripheral surfaces of the roller 103 and the quartz glass tube 105 where the quartz glass tube is mounted, and FIG.
As shown in (b), the cutting start position and the cutting end position on the outer peripheral surface do not match, causing a step.

[0003]

In order to solve the above-mentioned drawbacks, it is burdensome for the operator to cut the quartz glass tube while preventing the displacement in the longitudinal direction of the quartz glass tube. This will increase costs.

In order to prevent the displacement, it is conceivable to provide a holding mechanism for holding the quartz glass tube with a chuck, and to provide a rotating mechanism for rotating the quartz glass tube in the outer circumferential direction of the quartz glass tube in the holding state. However, time is required for the operation of holding the large-diameter quartz glass tube on the chuck, the cutting operation efficiency is reduced, and the cost is increased.

The present invention has been made in view of the above-mentioned drawbacks, and has as its object to provide a method and apparatus for cutting a quartz glass tube without imposing a burden on an operator.

[0006]

SUMMARY OF THE INVENTION The present invention is a cutting method and apparatus for cutting by pressing a cutting blade portion of a cutter against the outer periphery of a quartz glass tube. While rotating the glass tube on the quartz glass tube mounting table in the outer peripheral direction of the glass tube, in the direction intersecting the length direction of the glass tube, the cutting blade portion from the outer periphery of the glass tube A load is pressed from a cut surface of the glass tube to one surface of the cutting blade in a state where the glass blade is lowered at a predetermined depth.

Here, the cutter may be a disk-shaped diamond blade, a thread saw or a chain saw. Since the quartz glass tube is rotating in the outer peripheral direction, the cutter can be cut in the rotation direction in which the cutting blade bites into the quartz glass tube.

The cutting blade portion has a predetermined depth from the outer periphery of the glass tube, that is, the cutting area of the cutting blade portion completely covers the thickness of the quartz glass forming the peripheral surface of the quartz glass tube. Therefore, even when a disk-shaped blade is used, there is no need to increase the outer diameter of the blade, and since a large-diameter blade is not required, durability against chipping of the blade is good. .

Further, since a load is pressed from one side of the cutting section of the cutter section to the other side of the cutting section of the glass tube, the quartz glass tube vibrates in the longitudinal direction during cutting, so that there is little possibility that the cutting dimensions will vary.

[0010] The present invention is also configured such that the glass tube is mounted on the quartz glass tube mounting table so that a load due to the weight of the glass tube is pressed toward one surface of the cutting blade portion. Is an effective means. Such a load pressing means can be simply configured by inclining the quartz glass tube.

The load pressing need not always be performed, but may be performed in synchronization with the timing when the cutting blade of the cutter contacts the outer periphery of the quartz glass tube. Therefore, it is also an effective means of the present invention to mount the glass tube on the quartz glass tube mounting table at least in a cut state so as to be pressed toward one surface of the cutting blade portion. Such a load pressing means can be constituted by a rotating roller which comes into contact with the outer periphery of the glass tube and rotates in contact with the glass tube in the longitudinal direction thereof.

It is also an effective means of the present invention that the cut surface is flattened by the cutting blade after the quartz glass tube is cut. At the time of this flattening, since a load is pressed from one side of the cutting blade portion to the one side of the glass tube, it is not necessary to apply a pressing force separately to one side of the cutting blade portion via a glass tube. Thus, the burden on the worker is reduced.

In addition, since the load is pressed from one side of the cutting blade portion to the one side of the cutting section of the glass tube, the flattening means can be automatically performed continuously after the end of the cutting, thereby reducing the burden on the operator. It is reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the invention thereto, but are merely illustrative examples unless otherwise specified. Not just.

First, an outline of a quartz glass tube cutting apparatus used in the present embodiment will be described. FIG. 1 is a schematic view of an embodiment of a quartz glass tube cutting device, FIG. 2 is a plan view showing a cutter unit of FIG. 1, FIG. 3 is a side view showing a main part of FIG.
FIG. 4 is an embodiment diagram showing an outline of a control device of the quartz glass tube cutting device used in the present embodiment.

The quartz glass tube cutting device 34 includes a base 35 on which the quartz glass tube mounting table 2 on which the quartz glass tube 33 is slidably mounted in the longitudinal direction is disposed above, and a central portion of the mounting table 2. The cutter unit 1 includes a diamond cutter blade 16 that is disposed above and that can move up and down.

The mounting table 2 has a V-shaped cross section 2a in the longitudinal direction.
(FIG. 3A) is formed, and a large number of four glass tube rotating rollers 3 having roller surfaces slightly protruding from the surface along the V-groove surface are arranged in the longitudinal direction. The rotation driving force of the roller 3 is transmitted via a chain 4 by a roller rotation motor 6 disposed in a base 35. The roller 3 is connected to a quartz glass tube 33 by a link mechanism (not shown).
May be configured to be able to move up and down between the upper stop position where the camera is placed and the retracted position below the upper stop position. With this configuration, the roller 3 is set to the retracted position and the quartz glass tube is placed on the mounting table 2 so that even if the quartz glass tube is erroneously dropped on the roller when the quartz glass tube is placed, the roller 3 No impact is applied.

A roller 17 is disposed in the base 35 in a direction orthogonal to the roller 3.
0, a rotational driving force is transmitted via the chain 18 and a stop position for placing the quartz glass tube 33 slidably in the longitudinal direction at a position higher than the roller 3 by a link mechanism (not shown). And a retractable position thereunder.

The mounting table 2 is provided with a cutter blade 16.
Since the upper and lower left and right ends in FIG. 1 are slightly higher than immediately below, a pressing force is applied to the center of the mounting table by the weight of the quartz glass tube. The inclination varies depending on the size of the quartz glass tube, that is, the mass.
A slope of mm is desirable. Further, the roller 17 is brought into contact with the outer periphery of the quartz glass tube 33 at the same position as the roller 3 between the upper stop position and the retracted position to stop and press the quartz glass tube 33 in the longitudinal direction. It is also possible to configure. In this case, the mounting table 2 need not be inclined.

Next, the cutter section 1 will be described. 2 and 3, a cut section frame 21 having a U-shaped cross section is erected on an upper portion of a base 35 via an auxiliary stand 37, and an opening 21a is opened in the upper center of the frame 21. A pulley 36 is rotatably arranged in the portion 21a, and guide rails 23 are provided on the front surface of the frame 21.
The sliding plate 2 is slidable up and down on the guide rails 23, 23.
8 are provided. The lower side of the slide plate 28 is connected to a slide shaft 26a of the air cylinder 26 (FIG. 1).

An opening 28a is formed in the sliding plate 28 so that its center upper portion is elongated in a shape corresponding to the opening 21a, and one end of a belt 29 is fixed to an edge 28b of the opening 28a.
The belt 29 is supported by the pulley 36, and the balancer 27 is suspended from the other end.

A cutter unit frame 20 having a U-shaped cross section is disposed on the sliding plate 28, and the shelf plate 20 is mounted on the frame 20.
b and 20c are provided. On the shelf 20b, an air cylinder 7 for positioning a reference roller frame 13 described later, a motor 9 for sliding the frame 13, and a motor 8 for rotating a cutter blade 16 described later are provided. It is arranged. On the shelf 20c, the belt 30
The diamond cutter blade 16 is arranged so as to be rotatable.

The guide rail 2 is provided on the frame 20.
The reference roller unit frame 13 is disposed so as to be able to slide up and down on the guide rails 24. The frame 13 is provided with a female screw portion 13a screwed with the male screw portion 9b of the rotating shaft 9a of the motor 9. Also, projecting pieces 13 are provided at the left and right ends in FIG.
b, 13b are provided, and the protruding pieces have arm portions 13c, 13b.
c, and the reference rollers 1 are provided on the arms 13c, 13c.
Glass tube rotation position detection sensors 15 and 15 are provided near the rollers 4 and 14 and the rollers 14, respectively.

As shown in FIG. 3B, guide rails 25, 25 are provided on both right and left ends of the cut portion frame 21 in FIG.
Are provided, and glass tube holding belt portions 10, 10 are provided so as to be slidable up and down on the guide rails 25, 25. An air cylinder 11 is fixed to the belt portion 10, and a tip of a drive shaft 11 a of the cylinder 11 is
It is stuck to.

The belt portion 10 is provided with a pair of roller mounting plates 32, 32 spaced apart from each other by a predetermined distance, and the pair of roller mounting plates 32 is provided with rollers 31, 31 rotatably, respectively. The glass tube holding belt 12 is rotatably suspended between the rollers 31 and 31.

FIG. 4 is a schematic configuration diagram showing a wiring state of a mechanical part and an electric control part of the quartz glass tube cutting device. The computer 38 is connected to an input / output device using a keyboard (not shown), is connected to an interface BOX 46 via an I / O expansion box 39, a pulse board 40, and an I / O board 41, and is connected to an inverter 43 via a DA board 42. It is connected.

An air electromagnetic valve 47 connected to the interface box 46 is provided with an air cylinder 11 which slides on the glass tube holding belt portion 10 having the glass tube holding belt 12 for holding the quartz glass tube 33 from above.
The air cylinder 7 and the cutter blade 16 are connected to and controlled by the air cylinder 26 which approaches and separates from the quartz glass tube 33.

The driver 45 connected to the interface BOX 46 is connected to the motor 9 for controlling the cutting depth of the cutter blade 16. The driver 44 connected to the interface box 46 is connected to the motor 6 that rotates the quartz glass tube 33 in the circumferential direction. Inverter 43 connected to DA board 42
Is connected to the motor 8 for rotating the cutter blade 16. A sensor 15 for detecting the rotational position of the quartz glass tube 33 in the circumferential direction and a switch sensor (not shown) for generating an output when the reference roller 14 detects the quartz glass tube 33 are connected to the interface BOX 46.

Next, the operation of the present embodiment will be described step by step with reference to FIGS. Step (1): The quartz glass tube 33 is mounted on the right side of the mounting table 2 as shown in FIG. 1, and an aluminum tape is adhered to the outer periphery as an index 33a indicating a cutting start position. Step (2): The air cylinder 11 is operated by operating the input / output device of the computer 38, and the glass tube holding belt portion 10 is lowered from the position of the solid line shown in FIG. 12 presses and holds the outer periphery of the quartz glass tube 33.

Step (3): When the automatic cutting mode is started by operating the input / output device of the computer 38, the air cylinder 26 operates, and the sliding plate 28 starts to descend from the stop position in FIG. The cutter unit frame 20 and the reference roller unit frame 13 provided on the moving plate 28 descend.

Step (4): When the reference roller 14 comes into contact with the outer periphery of the quartz glass tube 33, the mounting portion of the reference roller 14 bends, a switch (not shown) is closed, and the sensor 15
The motor 6 rotates and the roller 3 rotates, and the quartz glass tube 33 rotates in the direction of the arrow, on condition that the index 33a indicating the cutting start position is not detected (FIG. 2).
The sensor 15 detects 3a, and the rotation of the quartz glass tube 33 stops (FIG. 6A).

Step (5): In this state, the motor 8 rotates, the cutter blade 16 rotates, and the motor 9 starts rotating. At this time, since the reference roller 14 is in contact with the outer periphery of the quartz glass tube 33, the position is maintained, and the screw portion 9b of the rotating shaft of the motor 9 rotates, so that the cutter unit frame 20 descends together with the slide plate 28. Therefore, the drive shaft 26a of the air cylinder 26 descends into the cylinder main body, and the cutter blade 16 of the frame 20 starts cutting the quartz glass tube 33 and cuts to a predetermined depth (FIG. 6B).

Step (6): The predetermined depth is stored in advance as the number of pulses of the motor 9 depending on the type of the quartz glass tube, or a sensor (not shown) is provided to detect the position of the cutter unit frame 20. May be configured. After cutting to a predetermined depth, the motor 6 rotates to rotate the quartz glass tube 33, and cuts the entire glass tube to cut the quartz glass tube.

In this cutting step, the quartz glass tube is cut by the cutter blade 16 as shown in FIG. 7 as a cutting area 16a. Then, since a pressing force is applied to the cutter blade 16 from the quartz glass tube 33 in the direction of arrow 51 with respect to the rotation direction of the quartz glass tube 33 as indicated by arrow 50, the shaving becomes deeper rightward in FIG. 3
In step 3b, a step is generated between the start of cutting and the end of cutting, as shown in FIG.

Step (7): In the state shown in FIG. 6 (b), the quartz glass tube 33 makes one rotation and the index 33a is
5 (FIG. 7 (e)), the glass tube holding belt 10 is raised by the air cylinder 11 and the quartz glass tube 3
3 is in a free state (FIG. 6 (c)).

Step (8): In this state, a step formed by the first rotation is ground. At this time, the quartz glass tube 3
Since 3 is in a free state, the cutter blade 16 receives the resistance of the quartz glass tube 33 in the upper left direction in FIG. On the other hand, the quartz glass tube 33 attempts to move to the left but cannot move to the left from the cutter blade 16,
Every time the motor rotates in the outer peripheral direction, the step becomes smaller, and the step disappears by the time the second rotation is completed (FIG. 7).
(F)).

Step (9): When the grinding process is completed,
In the state shown in FIG.
Is raised, the cutter unit frame 20 and the reference roller unit frame 13 are raised.
5, the cutter blade 16 is lowered from the outer peripheral surface of the quartz glass tube 33 to a predetermined depth, and the distance between the frame 20 and the frame 13 in FIG.

Step (10): The motor 9 is rotated in reverse in synchronization with the rise of the slide plate 28 to separate the frame 20 and the frame 13 from each other to a position regulated by the air cylinder 7, and both are returned to the initial positions. I do.

Step (11): When the grinding process is completed and the frames 20 and 13 return to their initial positions,
The upper quartz glass tube 33 is mounted on the left side of the mounting table 2, and the operations of steps (1) to (10) are repeated.

In the operation of scraping off the step, it is desirable to use both sides of the cutting machine in order to use the side surface of the cutter blade 16 and to prevent a loss. In addition, the rotation speed of the quartz glass tube at the time of cutting varies depending on the thickness of the tube.
If it exceeds 5 mm and is 12 mm or less, 140 mm / min is desirable. In the grinding step after cutting, it is desirable to rotate the quartz glass tube 33 at a higher speed than during cutting.

In the present embodiment, the air cylinder 7
20 and frame 1 up to the position regulated by
The distance between 3 is set to the initial position, but this is
May be stored, and the motor 9 may be rotated reversely and stopped accordingly.

[0042]

As described above, according to the method and apparatus for cutting a quartz glass tube of the present invention, the cutting blade is lowered to a predetermined depth from the outer periphery of the glass tube, and is placed on one surface of the cutting blade. Since the load is pressed from the cut surface of the glass tube, there is little possibility that the quartz glass tube vibrates against the load during cutting and the cutting dimension varies.

When the cutting surface is flattened by the cutting blade, a load is automatically pressed from one side of the cutting blade to the cutting surface of the glass tube. It is not necessary for the operator to apply a pressing force to one surface of the cutting blade portion, and the burden on the operator is reduced.

In addition, since the load is pressed from the cut surface of the glass tube to one side of the cutting blade portion, the flattening means can be automatically performed continuously after the end of cutting, thereby reducing the burden on the operator. It is reduced.

[Brief description of the drawings]

FIG. 1 is an embodiment diagram schematically showing a quartz glass tube cutting device.

FIG. 2 is a plan view showing a cutter unit of FIG. 1;

FIG. 3 is a side view showing a main part of FIG. 2;

FIG. 4 is an embodiment diagram showing an outline of a control device of the quartz glass tube cutting device used in the present embodiment.

FIG. 5 is an explanatory diagram illustrating an initial operation of the quartz glass tube cutting device.

FIG. 6 is an explanatory diagram illustrating a cutting operation of the quartz glass tube cutting device.

FIG. 7 is an explanatory view showing a cutting state of a quartz glass tube.

FIG. 8 is a schematic explanatory view showing a conventional example of a quartz glass tube cutting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutter part 2 Quartz glass tube mounting table 16 Diamond cutter blade 33 Quartz glass tube

Claims (8)

[Claims] 1. A method for cutting a quartz glass tube by pressing a cutting blade portion of a cutter against an outer periphery of the quartz glass tube, wherein the glass tube is placed on a quartz glass tube mounting table in a direction of an outer periphery of the glass tube. And cutting the glass tube on one surface of the cutting blade in a state where the cutting blade is lowered a predetermined depth from the outer periphery of the glass tube in a direction intersecting the length direction of the glass tube. A method for cutting a quartz glass tube, wherein a load is pressed from a surface. 2. The glass tube is mounted on the quartz glass tube mounting table such that a load due to the weight of the glass tube is pressed toward one surface of the cutting blade portion. The method for cutting a quartz glass tube according to the above. 3. The quartz glass according to claim 1, wherein the glass tube is mounted on the quartz glass tube mounting table at least in a cut state so as to be pressed toward one surface of the cutting blade portion. How to cut the tube. 4. The method for cutting a quartz glass tube according to claim 2, wherein after the quartz glass tube is cut, the cut surface is flattened by the cutting blade portion. 5. A quartz glass tube cutting device for cutting by pressing a cutting blade portion of a cutter against an outer periphery of a quartz glass tube, wherein the quartz glass is rotatable in an outer peripheral direction of the glass tube while the glass tube is mounted. A tube mounting table, a cutter portion in which the cutter is reciprocally arranged in a direction intersecting with a length direction of the glass tube, and at least a state in which the cutting blade portion is lowered by a predetermined depth from the outer periphery of the glass tube. And a load pressing means for pressing a load from a cut surface of the glass tube on one surface of the cutting blade portion. 6. The glass tube mounting table may be configured such that an outer side immediately below the cutter unit is arranged at a high position so that a load due to the weight of the glass tube is applied toward one surface of the cutting blade unit. The quartz glass tube cutting device according to claim 5, characterized in that: 7. The quartz glass tube according to claim 5, wherein said load pressing means is constituted by a rotating roller which comes into contact with an outer periphery of said glass tube and rotates in contact with said glass tube in a longitudinal direction thereof. Cutting method. 8. The cutter, after cutting the quartz glass tube,
The apparatus for cutting a quartz glass tube according to claim 5, wherein the cutting surface is flattened by the cutting blade portion.