JP3734367B2 - Quartz glass tube cutting method and apparatus - Google Patents

Description

[0001]
BACKGROUND 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]
[Prior art]
Conventionally, when a quartz glass tube is cut, the diamond blade is lowered while the quartz glass tube is rotated in the outer circumferential direction.
At this time, as shown in FIG. 8A, the quartz glass tube 105 is placed on the glass tube rotating roller 103 of the quartz glass tube mounting table 106, and the blade 102 is automatically rotated in the outer peripheral direction. When lowered, the quartz glass tube 105 is displaced in the longitudinal direction due to bending of the outer peripheral surfaces of the roller 103 and the quartz glass tube 105, which are the places where the quartz glass tube is placed, and as shown in FIG. The cutting start position on the surface and the cutting end position do not coincide with each other, resulting in a step.
[0003]
[Problems to be solved by the invention]
In order to eliminate such drawbacks, the operator is forced to bear a burden to cut while preventing the shift in the longitudinal direction of the quartz glass tube by the operator, which takes time and increases the cost.
[0004]
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 peripheral direction of the quartz glass tube in the holding state. Time is spent on the work of holding the large-diameter quartz glass tube on the chuck, cutting work efficiency is reduced, and the cost is increased.
[0005]
The present invention has been made in view of the above-described conventional drawbacks, and an object of the present invention is to provide a quartz glass tube cutting method and apparatus that do not impose a burden on an operator.
[0006]
[Means for Solving the Problems]
The present invention is a method for cutting a quartz glass tube, wherein the cutting blade portion of the cutter blade is pressed against the outer periphery of the quartz glass tube and cut.
A pressing and holding step for pressing and holding the outer periphery of the quartz glass tube in a state where the quartz glass tube is placed on the glass tube mounting table;
A first cutting step of starting cutting the quartz glass tube with a cutter blade in a state where the quartz glass tube is stopped at the cutting reference position, and cutting to a predetermined depth;
After cutting to a predetermined depth, and one rotation of the quartz glass tube, and cutting over the entire circumference glass tube, and a second cutting step of cutting the entire circumference quartz glass tube,
In order to remove the level difference generated in the second cutting step, the sensor detects that the quartz glass tube has made one rotation, and then the pressing force of the quartz glass tube is released toward the side of the cutter blade. the quartz glass tube perform the rotation of the second rotation of the quartz glass tube while to press the glass tube longitudinally, flattening the cut surface the step occurs while pressing the quartz glass tube end face side of the cutter blade This is a method for cutting a quartz glass tube .
Furthermore, the present invention provides an apparatus for use in the method for cutting a quartz glass tube according to claim 1,
A quartz glass tube mounting table that is rotatable in the outer circumferential direction of the quartz glass tube in a state where the quartz glass tube is placed;
A cutter blade arranged to reciprocate the cutter in a direction intersecting the length direction of the quartz glass tube,
A pressure holding means for pressing and holding the outer periphery of the quartz glass tube in a state where the quartz glass tube is placed on the glass tube mounting table;
A reference position detecting means for stopping the quartz glass tube at the cutting reference position;
Means for starting the cutting of the quartz glass tube with a cutter blade and detecting a predetermined depth for cutting to a predetermined depth;
Means for rotating the quartz glass tube after cutting to a predetermined depth;
The quartz glass tube may be configured to be pressed in the longitudinal direction of the glass tube toward the side surface of the cutter blade located at the time of cutting the quartz glass tube . For example, the means for pressing the quartz glass tube in the longitudinal direction of the glass tube It is preferable that the mounting table 2 is a means for inclining the quartz glass tube upward from directly under the cutter blade, and the cutter blade grinds and removes the step formed by cutting the entire circumference of the quartz glass tube by the side surface of the cutter blade. A diamond cutter blade that can be used is preferable, and a pressing and holding means that presses and holds the outer periphery of the quartz glass tube in a state where the quartz glass tube is placed on the glass tube mounting table is preferably a glass tube holding belt.
[0007]
Here Te smell, because quartz glass tube is rotated in the outer circumferential direction, the cutter blades may be cut in the direction of rotation cutting blade portion bites a quartz glass tube.
[0008]
The cutting blade portion of the cutter blade 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. it is sufficient to cut drop as, in the case of using the disk-like blade for this, it is not necessary to increase the blade outer diameter, does not require a large-diameter blade durability against such blades missing Good.
[0009]
In addition, since the load is pressed from the cutting surface of the glass tube to one surface of the cutting blade portion of the cutter blade portion , there is little fear that the quartz glass tube will vibrate in the longitudinal direction during cutting and the cutting dimensions will vary.
[0010]
It is also effective that the glass tube is mounted on the quartz glass tube mounting table so that a load due to its own weight is pressed toward one surface of the cutting blade portion. Means. Such pressing and holding means can be easily configured by inclining the quartz glass tube.
[0011]
Further, the pressing retaining is not required to constantly pressed and held, or may be performed in synchronization with the timing of the cutting blade portion of the cutter blade is in contact with the outer periphery of the quartz glass tube.
Therefore, it is also an effective means of the present invention to place the glass tube so that the glass tube is pressed toward one surface of the cutting blade portion of the cutter blade at least in the cut state in the quartz glass tube mounting table. Such pressing and holding means can be constituted by a rotating roller that contacts the outer periphery of the glass tube and rotates in contact with the length of the glass tube.
[0012]
Further, in this case, in order to remove the step generated in the second cutting step, it is preferable to have a step removing step of grinding the step with the pressing force of the quartz glass tube being released. It is preferable to flatten the cut surface by using the side surface of the cutter blade in the second rotation .
At the time of this flattening, a load is pressed from the cut surface of the glass tube to one surface of the cutting blade portion, so it is not necessary to separately apply a pressing force to one surface of the cutting blade portion via the glass tube. , The burden on the operator is reduced.
[0013]
Further, the step removing step of grinding the step with the pressing force of the quartz glass tube released is continuously applied after the end of cutting because the load is pressed from the cut surface of the glass tube to one side of the cutting blade portion. This can be done automatically, reducing the burden on the operator.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to embodiments 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 present invention only to specific examples unless otherwise specified. Not too much.
[0015]
First, an outline of a quartz glass tube cutting device used in the present embodiment will be described.
1 is an embodiment diagram showing an outline of a quartz glass tube cutting device, FIG. 2 is a plan view showing a cutter part of FIG. 1, FIG. 3 is a side view showing the main part of FIG. 2, and FIG. It is one Embodiment figure which shows the outline of the control apparatus of the quartz glass tube cutting device used for this Embodiment.
[0016]
The quartz glass tube cutting device 34 includes a base 35 having a quartz glass tube mounting table 2 on which the quartz glass tube 33 is slidably mounted in the longitudinal direction, and a central portion of the mounting table 2. And a cutter unit 1 having a diamond cutter blade 16 that can move up and down.
[0017]
The mounting table 2 has four glass tube rotation rollers having a V-groove 2a (FIG. 3A) formed in the longitudinal direction and a roller surface slightly protruding from the surface along the V-groove surface. A number 3 is arranged in the longitudinal direction.
The roller 3 is transmitted with a rotational driving force via a chain 4 by a roller rotating motor 6 disposed in a base 35.
The roller 3 may be configured to be movable up and down between an upper stop position on which the quartz glass tube 33 is placed and a retracted position below it by a link mechanism (not shown). Even if the quartz glass tube is accidentally dropped on the roller 3 when the quartz glass tube is placed on the placing table 2 by placing the quartz glass tube on the placing table 2 with the roller 3 in the retracted position, the roller 3 There is no impact.
[0018]
A roller 17 is arranged in the base 35 in a direction orthogonal to the roller 3, and the roller 17 is configured to transmit a rotational driving force via the chain 18 by the motor 20, and a link mechanism (not shown). Thus, the quartz glass tube 33 is configured to be movable up and down between an upper stop position where the quartz glass tube 33 is slidably mounted in the longitudinal direction at a position higher than the roller 3 and a retracted position below the upper stop position.
[0019]
Since the mounting table 2 is formed slightly higher on the left and right ends in FIG. 1 than directly below the cutter blade 16, 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, but an inclination of 1 to 3 mm with respect to 3 m 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 and stopped so as to 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.
[0020]
Next, the cutter unit 1 will be described. 2 and 3, a cutting part frame 21 having a U-shaped cross section is erected on an upper part of a base 35 via an auxiliary base 37, and an opening 21 a is opened at the center upper part of the frame 21. A pulley 36 is rotatably disposed in the portion 21a. Guide rails 23 and 23 are provided on the front surface of the frame 21, and a sliding plate 28 is disposed on the guide rails 23 and 23 so as to be slidable up and down. ing. The lower side of the sliding plate 28 is connected to the sliding shaft 26a of the air cylinder 26 (FIG. 1).
[0021]
The sliding plate 28 is formed with an opening 28a having a long hole at the center upper portion corresponding to the opening 21a, and one end of a belt 29 is fixed to the edge 28b of the opening 28a. A balancer 27 is suspended from the other end supported by the pulley 36.
[0022]
The sliding plate 28 is provided with a cutter section frame 20 having a U-shaped cross section. The frame 20 is provided with shelf boards 20b and 20c, and a positioning of a reference roller section frame 13 to be described later is provided on the shelf board 20b. An air cylinder 7 that rotates, a motor 9 that slides on the frame 13, and a motor 8 that rotates a cutter blade 16 described later are disposed.
A diamond cutter blade 16 is disposed on the shelf plate 20 c so as to be rotatable by the belt 30 from the motor 8.
[0023]
Further, guide rails 24 and 24 are disposed on the frame 20, and a reference roller portion frame 13 is disposed on the guide rails 24 and 24 so as to be slidable up and down.
The frame 13 is provided with a female screw portion 13a that is screwed with the male screw portion 9b of the rotating shaft 9a of the motor 9. Further, projecting pieces 13b and 13b are provided on the left and right ends of the frame 13 in FIG. 2, and arm portions 13c and 13c are provided on the projecting pieces. The arm portions 13c and 13c include reference rollers 14 and 14 and In the vicinity of the roller 14, glass tube rotation position detection sensors 15 and 15 are disposed.
[0024]
As shown in FIG. 3B, guide rails 25 and 25 are disposed on the left and right ends of the cutting part frame 21 in FIG. 2, and a glass tube holder is slidable on the guide rails 25 and 25 up and down. Belt portions 10 and 10 are disposed. An air cylinder 11 is fixed to the belt portion 10, and the tip of the drive shaft 11 a of the cylinder 11 is fixed to an auxiliary base 37.
[0025]
Two pairs of roller mounting plates 32, 32 are provided on the belt portion 10 with a predetermined distance apart, and rollers 31, 31 are rotatably provided on the pair of roller mounting plates 32, respectively. A glass tube holding belt 12 is suspended from 31 and 31 so as to be rotatable.
[0026]
FIG. 4 is a schematic configuration diagram showing a wiring state between the mechanical part and the 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.
[0027]
The electromagnetic valve 47 for air connected to the interface BOX 46 includes an air cylinder 11 that slides on a glass tube holding belt portion 10 having a glass tube holding belt 12 that holds the quartz glass tube 33 from above, an air cylinder 7, and a cutter. The blade 16 is connected to an air cylinder 26 that approaches and separates from the quartz glass tube 33 and controls them.
[0028]
The driver 45 connected to the interface BOX 46 is connected to the motor 9 that controls 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.
The inverter 43 connected to the DA board 42 is connected to the motor 8 that rotates the cutter blade 16.
A sensor 15 that detects the circumferential rotation position of the quartz glass tube 33 and a switch sensor (not shown) that generates an output when the reference roller 14 detects the quartz glass tube 33 are connected to the interface BOX 46.
[0029]
Next, the operation of the present embodiment will be described step by step with reference to FIGS. 1 and 5 to 7.
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 attached to the outer periphery as an index 33a indicating a cutting start location.
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, the outer periphery of the quartz glass tube 33 is pressed and held.
[0030]
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 top stop position in FIG. The cutter part frame 20 and the reference roller part frame 13 provided in the lower part are lowered.
[0031]
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 is bent, a switch (not shown) is closed, and the sensor 15 (FIG. 2) indicates an index 33a indicating the cutting start location. If the motor 6 rotates and the roller 3 rotates, the quartz glass tube 33 rotates in the direction of the arrow, the sensor 15 detects the index 33a, and the quartz glass tube 33 rotates. Stop (FIG. 6 (a)).
[0032]
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 of the reference roller 14 is maintained and the screw portion 9b of the rotating shaft of the motor 9 rotates, so that the cutter portion frame 20 is lowered together with the sliding plate 28. Therefore, the drive shaft 26a of the air cylinder 26 is lowered into the cylinder body, and the cutter blade 16 of the frame 20 starts cutting the quartz glass tube 33 and cuts it to a predetermined depth (FIG. 6B).
[0033]
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. When cutting to a predetermined depth, the motor 6 rotates to rotate the quartz glass tube 33 and cut the entire circumference of the glass tube to cut the quartz glass tube.
[0034]
In this cutting step, the quartz glass tube is cut by the cutter blade 16 as shown as a cutting area 16a in FIG. Then, since the pressing force is applied from the quartz glass tube 33 to the cutter blade 16 in the direction of the arrow 51 with respect to the rotation direction of the quartz glass tube 33 of the arrow 50, the cutting becomes deep in the right direction in FIG. As for 33b, the level | step difference shown by the discontinuous part 33c which does not change monotonously as shown in FIG.
[0035]
Step (7): In the state of FIG. 6 (b), the quartz glass tube 33 makes one rotation and the sensor 15 detects the index 33a (FIG. 7 (e)). 10 rises and the quartz glass tube 33 becomes free (FIG. 6C)).
[0036]
Step (8): In this state, the step generated by the first rotation is ground. At this time, since the quartz glass tube 33 is in a free state, the cutter blade 16 receives the resistance of the quartz glass tube 33 in the left direction in FIG. On the other hand, since the quartz glass tube 33 tries to move to the left side but cannot move to the left side from the cutter blade 16, the stepped portion becomes smaller each time it rotates in the outer circumferential direction, and the step is eliminated when the second rotation is completed. (FIG. 7 (f)).
[0037]
Step (9): When the grinding process is completed, the cutter part frame 20 and the reference roller part frame 13 are raised by raising the sliding plate 28 by the air cylinder 26 in the state of FIG. ), The cutter blade 16 is lowered to a predetermined depth from the outer peripheral surface of the quartz glass tube 33, and the relationship between the frame 20 and the frame 13 is shorter than the initial position in FIG.
[0038]
Step (10): The motor 9 is rotated reversely in synchronization with the ascent of the sliding plate 28, the frame 20 and the frame 13 are separated to a position regulated by the air cylinder 7, and both return to the initial position.
[0039]
Step (11): When the grinding process is completed and the frame 20 and the frame 13 are returned to the initial positions, the quartz glass tube 33 in FIG. 1 is placed on the left side of the placing table 2, and the operations of steps (1) to (10) are performed. repeat.
[0040]
In the operation of scraping off the step, since the side surface of the cutter blade 16 is used, it is desirable to perform cutting with both the left and right sides of the cutting machine in order to prevent partial reduction.
Further, the rotation speed of the quartz glass tube at the time of cutting varies depending on the thickness of the tube, and is preferably 340 mm / min when the thickness is 5 mm or less and 140 mm / min when the thickness exceeds 5 mm and 12 mm or less.
In the grinding process after cutting, it is desirable to rotate the quartz glass tube 33 at a higher speed than during cutting.
[0041]
In the present embodiment, the distance between the frame 20 and the frame 13 is set as the initial position until the position regulated by the air cylinder 7, but this stores the number of rotations of the motor 9, and the motor 9 may be reversed to stop.
[0042]
【The invention's effect】
As described above, according to the quartz glass tube cutting method and apparatus of the present invention, the glass tube is cut on one side of the cutting blade portion in a state where the cutting blade portion is lowered by a predetermined depth from the outer periphery of the glass tube. Since the load is pressed from the surface, there is little possibility that the quartz glass tube vibrates against the load during cutting and the cutting dimension varies.
[0043]
In addition, when removing the step to grind the step while the pressing force of the quartz glass tube is released to flatten the cut surface, a load is automatically applied to one side of the cutting blade portion from the cut surface of the glass tube. Therefore, after the quartz glass tube is cut, it is not necessary for the operator to apply a pressing force to one side of the cutting blade portion, and the burden on the operator is reduced.
[0044]
In addition, since the load is pressed from the cutting surface of the glass tube to one surface of the cutting blade portion, the flattening means can be automatically performed continuously after the cutting is completed, and the burden on the operator is reduced. .
[Brief description of the drawings]
FIG. 1 is an embodiment diagram showing an outline of a quartz glass tube cutting device.
FIG. 2 is a plan view showing a cutter portion of FIG.
FIG. 3 is a side view showing the main part of FIG. 2;
FIG. 4 is an embodiment diagram showing an outline of a control device of a quartz glass tube cutting device used in the present embodiment.
FIG. 5 is an explanatory diagram for explaining an initial operation of the quartz glass tube cutting device.
FIG. 6 is an explanatory diagram for explaining the cutting operation of the quartz glass tube cutting device.
FIG. 7 is a cut explanatory view showing a cut state of the 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 stand 16 Diamond cutter blade 33 Quartz glass tube

Claims (4)

In the cutting method of the quartz glass tube that presses the cutting blade portion of the cutter blade against the quartz glass tube outer periphery and cuts it,
A pressing and holding step for pressing and holding the outer periphery of the quartz glass tube in a state where the quartz glass tube is placed on the glass tube mounting table;
A first cutting step of starting cutting the quartz glass tube with a cutter blade in a state where the quartz glass tube is stopped at the cutting reference position, and cutting to a predetermined depth;
After cutting to a predetermined depth, and one rotation of the quartz glass tube, and cutting over the entire circumference glass tube, and a second cutting step of cutting the entire circumference quartz glass tube,
In order to remove the level difference generated in the second cutting step, the sensor detects that the quartz glass tube has made one rotation, and then the pressing force of the quartz glass tube is released toward the side of the cutter blade. the quartz glass tube perform the rotation of the second rotation of the quartz glass tube while to press the glass tube longitudinally, flattening the cut surface the step occurs while pressing the quartz glass tube end face side of the cutter blade A method for cutting a quartz glass tube, comprising: In the apparatus used for the cutting method of the quartz glass tube of Claim 1,
A quartz glass tube mounting table that is rotatable in the outer circumferential direction of the quartz glass tube in a state where the quartz glass tube is placed;
A cutter blade arranged to reciprocate the cutter in a direction intersecting the length direction of the quartz glass tube,
A pressure holding means for pressing and holding the outer periphery of the quartz glass tube in a state where the quartz glass tube is placed on the glass tube mounting table;
A reference position detecting means for stopping the quartz glass tube at the cutting reference position;
Means for starting the cutting of the quartz glass tube with a cutter blade and detecting a predetermined depth for cutting to a predetermined depth;
Means for rotating the quartz glass tube after cutting to a predetermined depth;
A quartz glass tube cutting device comprising: means for pressing the quartz glass tube in a longitudinal direction of the glass tube toward a side surface of a cutter blade positioned at the time of cutting the quartz glass tube. 3. The quartz glass tube cutting device according to claim 2, wherein the means for pressing the quartz glass tube in the longitudinal direction of the glass tube is a means for inclining the quartz glass tube upward from directly below the cutter blade. . 3. The quartz glass tube cutting device according to claim 2 , wherein the pressing and holding means for pressing and holding the outer periphery of the quartz glass tube with the quartz glass tube mounted on the glass tube mounting table is a glass tube holding belt. .

Images