JP3388687B2 - Apparatus and method for controlling the feed of a continuously extended body pressed and delivered with a predetermined torque - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous extending body feed control apparatus and method for pressing and delivering a continuous extending body having a melted tip to a welded portion of a workpiece with a predetermined torque.

[0002]

2. Description of the Related Art Conventionally, when a semiconductor wafer is heat-treated, an operation of placing the wafer in a hermetically sealed reaction container, performing the heat treatment, and taking out the wafer is performed. The reaction vessel is airtightly joined to the mounting base and the opening is required to be separable. Usually, a flange portion is provided on the outer periphery of the reaction vessel,
A sealing contact is possible between the flange portion and the mounting base.

In forming the flange portion in the opening of the reaction vessel, a plate material is formed with a hole in accordance with the inner diameter of the opening of the reaction vessel, and is cut into a required dimension to form a donut shape. The donut-shaped flange portion is welded to the opening end of the reaction vessel, and then the uneven shape formed by welding is scraped off, and the connected state of the inner diameter surface and the outer peripheral surface is smoothly machined.

According to the above-mentioned prior art, since the flange portion is formed from the plate material, a large amount of the portion is unnecessary due to the shaving, and after the flange portion is welded to the reaction vessel, the connecting portion of both is continuous. It is necessary to ablate so as to be smooth, requires a large amount of material, requires a lot of ablation work, consumes tools quickly, and has a large number of machining steps, which is uneconomical.

As a method for solving the above problem, Japanese Patent Laid-Open No. 7-1
The technique disclosed in Japanese Patent No. 78169 is known.
In this technique, as shown in FIG. 6, a strip-shaped quartz glass part 103 is wound around the surface end of a transparent quartz glass tube 101 having a uniform cross section along the length, and the first burner 1
It is manufactured by heating and welding with 06 and the second burner 107.

[0006]

However, according to this technique, the quartz glass piece 103 is heated by the first burner 106 until it becomes easy to bend, and the quartz glass tube 10 is heated.
1 is wound along the outer periphery of the quartz glass tube 101 while rotating in the direction of the outer peripheral surface, and at the same time, the quartz glass part 1
The lower surface of 03 is heated by the second burner 107 to melt both surfaces to be bonded to each other.
Welded to the surface of 1.

[0007] Therefore, according to this method, the quartz glass piece 10
3, the thickness of the burner, the burner temperature, the rotation speed of the quartz glass tube 101, and the like affect the welding state, and a high level of skill and skill is required to perform the welding work while manually adjusting the burner, the rotation speed, and the like. Was done.

In view of the above-mentioned circumstances, the present invention does not require a high level of manual skill and skill, and a continuous extension body whose tip is melted is pressed and delivered to a welded portion of an object to be welded with a predetermined torque. An object is to provide an apparatus feed control device and method.

[0009]

The first aspect of the present invention is a feed control device for a continuous extended body, in which a continuous extended body having a melted tip is pushed out to a welded portion of a workpiece with a predetermined torque. An object-holding means capable of holding an object and moving the welded portion in the delivery direction of the continuous extension body, and delivering the end surface of the continuous extension body so as to contact the object to be welded with a predetermined torque. And a heating means for heating and melting the leading end portion of the continuous extension body including the end face.

The first invention is, for example, shown in FIGS. 2, 3, and 4.
As shown in (1), the object to be welded (quartz glass tube) 1 is held and the welded part of the object to be welded can be moved in the delivery direction of the continuous extension body (quartz glass plate) 3 (object to be welded holding means Quartz glass tube mounting portion) 10 and the object to be welded 1 are fed so that the end face of the continuous extension body 3 is brought into contact with the end face of the continuous extension body 3 with a predetermined torque (continuous extension body placement delivery). Means) 64 and the outer periphery of the tubular portion of the quartz glass tube 1, for example, a band-shaped end face 3a of the continuous extension body 3 is brought into contact, and a heating means for heating and melting the tip portion of the continuous extension body including the end face. (First burner 6, second burner 7, burner mount 5).

Therefore, if the pressing force for pressing the continuous extended body toward the object to be welded is low, the molten portion of the continuous extended body is not sufficiently pressed to the welded portion to be welded to the object to be welded. The internal pressure of the molten portion is low, and the welding will be performed with air bubbles included.

Further, when the pressing force is high, the melted tip portion of the continuous extension body is pressed by the pressing force and flows in the width direction of the continuous extension body, so that it exceeds the necessary amount on the outer periphery of the workpiece. Since it is welded in the width of, the amount of mechanical shaving after the completion of welding is increased, and since the continuous extended body is welded thinly by the amount of flowing in the width direction, it is possible to obtain the required thickness dimension. Can not.

Further, when the outer periphery of the object to be welded is not a perfect circle and has a surface having a diameter larger or smaller than the center of rotation of the object to be welded or an outer peripheral surface having irregularities, the continuous extension body is subjected to a predetermined torque. By sending, when the outer peripheral surface of the workpiece is changed and the outer peripheral surface is closer to the melting end portion of the continuous extended body than the reference value, the continuous extended body passes through the molten portion of the continuous extended body. By being pushed back, the delivery load to the continuous extension body increases, and the supply amount of the continuous extension body decreases.

If the outer peripheral surface of the workpiece is changed and the outer peripheral portion is farther than the reference value from the melting end of the continuous extended body, the delivery load to the continuous extended body becomes light and the pressing force is slightly increased. The number of continuous extension products will increase. Therefore, by applying a predetermined pressing force to the continuously extending body, it is possible to automatically adjust even if the object to be welded is not a perfect circle and the surface shape changes.

According to the first aspect of the present invention, since the continuous extension body is delivered in the direction of the object to be welded with a predetermined torque, it is welded to the object to be welded with a predetermined thickness and machined after welding is completed. The amount can be minimized.

Further, there are provided a torque detecting means for detecting a torque fluctuation of the continuous extension body, a clutch means capable of adjusting a transmission force from a drive source, and a clutch control means for controlling a transmission output of the clutch means. It is also an effective means of the first aspect of the present invention to adjust the torque to the predetermined torque.

As described above, for example, the torque detecting means (torque sensor) 36, the clutch means (electromagnetic clutch) 35 capable of adjusting the transmission force from the drive source (motor) 14,
A clutch control means (control circuit 50) for controlling the transmission output of the clutch means is provided and configured to adjust the torque to the predetermined torque. Good welding can be performed without containing bubbles in the welded portion of the welded product and without increasing the pressing force more than necessary.

The continuous extension body is provided with a computing means for obtaining a delivery amount of the continuous extension body or a movement amount of the molten portion of the workpiece, and a stopping means for stopping the delivery operation of the continuous extension body. It is also an effective means of the first aspect of the present invention to determine the delivery amount of the extended body and stop the delivery of the continuous extended body.

As described above, the calculating means for determining the delivery amount of the continuous extension body 3 or the movement amount of the molten portion of the workpiece to be welded in the control circuit 50 and the delivery operation of the continuous extension body are stopped. By providing the stop means (grasping means) 61, it is possible to obtain a predetermined delivery amount of the continuous extension body and stop the delivery of the continuous extension body. In this case, the quartz glass tube 1 continues to rotate, but since the supply of the quartz glass plate 3 is stopped, the melted portion is cut and separated from the unmelted portion. Therefore, without providing a special cutting means, simply by stopping the delivery of the continuous extension body,
Can be cut.

Further, a calculating means for determining a predetermined delivery amount of the continuous extension body or a movement amount of the object to be welded, and a retracting means for pulling back the continuous extension body in a direction opposite to the delivery direction when stopped. It is also an effective means of the first aspect of the present invention to provide a means and means.

When the retreating means (motor control circuit 60, gear 59) for pulling back the continuous extension body in the direction opposite to the feeding direction is provided as described above, for example, as shown in FIG. The pair of gripping means 61, 61 arranged on both sides in the width direction of the quartz glass plate 3 on the body placement / delivery means 64 grips the quartz glass plate 3 from both sides, and the rotation of the gear 59 connected to the motor 62 rotates the rack. Transmitted to 64a,
The continuous extended body placement / delivery means 64 moves in the direction of the arrow, which facilitates cutting and prevents the extra melting of the quartz glass plate 3.

The second aspect of the present invention is a feed control method for a continuous extended body, in which a continuous extended body having a melted tip is pressed out to a welded portion of the welded article with a predetermined torque, and the continuous extended body is attached to the outer periphery of the welded article. , Abutting the end face of the continuous extension body, heat and melt the tip portion of the continuous extension body including the end face to weld to the workpiece, and at a predetermined torque in the direction of the workpiece It is characterized by transmitting.

Further, the torque fluctuation of the continuous extension body is detected and adjusted to the predetermined torque, or the predetermined delivery amount of the continuous extension body or the movement amount of the workpiece is obtained. , Is configured to stop the delivery of the continuous extension body, or obtain a predetermined delivery amount of the continuous extension body or the movement amount of the welded object, and at the time of stop, It is also an effective means of the second aspect of the present invention to construct so as to pull back in the direction opposite to the sending direction.

In the second aspect of the present invention, as shown in FIGS. 3 and 4, for example, the end face 3a of a continuous extension body (quartz glass plate) 3 is applied to the outer circumference of the tubular portion of the quartz glass tube 1 for example. The tip portion of the continuous extension body including the end face is heated and melted. When the pressing force for pressing the continuous extension body in the direction of the object to be welded is low, the molten portion of the continuous extension body is not sufficiently pressed to the welded portion to be welded to the object to be welded, and therefore the internal pressure of the molten portion is It is low and will be welded with air bubbles.

Further, when the pressing force is high, the melted tip portion of the continuous extension body is pressed by the pressing force and flows in the width direction of the continuous extension body, so that it is more than necessary on the outer periphery of the workpiece. Since it is welded in the width of, the amount of mechanical shaving after the completion of welding is increased, and since the continuous extended body is welded thinly by the amount of flowing in the width direction, it is possible to obtain the required thickness dimension. Can not.

Further, when the outer periphery of the object to be welded is not a perfect circle and has a surface having a diameter larger or smaller than the center of rotation of the object to be welded or an outer peripheral surface having irregularities, the continuous extension body is subjected to a predetermined torque. By sending, when the outer peripheral surface of the workpiece is changed and the outer peripheral surface is closer to the melting end portion of the continuous extended body than the reference value, the continuous extended body passes through the molten portion of the continuous extended body. By being pushed back, the delivery load to the continuous extension body increases, and the supply amount of the continuous extension body decreases.

Further, when the outer peripheral surface of the object to be welded is changed so that the outer peripheral portion is farther from the reference value than the melting end of the continuous extended body, the delivery load to the continuous extended body becomes light and the pressing force is slightly increased. The number of continuous extension products will increase. Therefore, by applying a predetermined pressing force to the continuously extending body, it is possible to automatically adjust even if the object to be welded is not a perfect circle and the surface shape changes.

Therefore, according to the present invention, since the continuous extension body is delivered in the direction of the object to be welded with a predetermined torque, it is welded to the object to be welded with a predetermined thickness and is machined after welding is completed. The amount can be minimized.

However, when the pressing force applied to the continuous extension body is reduced to less than necessary, as described above, the welded portion of the object to be welded contains bubbles, and when the pressing force is increased more than necessary, the welded portion is increased. It is not possible to obtain the required thickness dimension of.

Therefore, it is desirable to detect the torque fluctuation of the continuous extension body and adjust it to the predetermined torque. With this configuration, it is possible to adjust to a predetermined torque even if the output torque of the drive source fluctuates, or the torque of the continuous extension body fluctuates due to an increase in the frictional force of another drive mechanism. it can.

Further, when the predetermined delivery amount of the continuous extension body or the movement amount of the object to be welded is obtained and the delivery of the continuous extension body is stopped, the quartz glass tube 1 continues to rotate. However, since the supply of the quartz glass plate 3 is stopped, the melted portion is cut and separated from the unmelted portion. Therefore, it is possible to cut by simply stopping the feeding of the continuous extension body without providing a special cutting means.

Further, a predetermined delivery amount of the continuous extension body or a movement amount of the object to be welded is obtained, and at the time of stopping, the continuous extension body is pulled back in a direction opposite to the delivery direction. In this case, for example, as shown in FIG. 2, the pair of gripping means 61, 61 arranged on both sides in the width direction of the quartz glass plate 3 on the continuous extended body placement and delivery means 64 can be used from both sides of the quartz glass plate 3. Gear 5 gripped and connected to motor 62
The rotation of 9 is transmitted to the rack 64a, the continuous extended body placement and delivery means 64 moves in the direction of the arrow, the cutting becomes easier, and the extra quartz glass plate 3 is not melted.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be exemplarily described in detail below with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described in this embodiment are not intended to limit the scope of the present invention, but merely illustrative examples. Nothing more.

FIG. 3 is a block configuration diagram according to the embodiment of the present invention. In the figure, a CPU 5 in which a RAM 53 and a ROM 54 storing a control program are connected
2 is connected to a control circuit 50 that controls each mechanism via an interface circuit 51. Start signal 5
The control circuit 50 whose drive control is started by the arrival of 5 is
A signal from the light receiving portion 11b of the sensor 11 for detecting the opening end face position of the quartz glass 1 in the direction perpendicular to the drawing of FIG. 3 and a signal from the encoder 19 for detecting the feed amount of the quartz glass plate 3 are input. Has been done.

Further, the control circuit 50 uses the clutch 35.
The transmission torque transmitted to the glass plate 3 via the roller 22 and the roller 22 is detected by the torque sensor 36 from the detection roller 21 via the belt 37, and the detection signal is input. In addition, on the upper surface of the quartz glass plate 3,
The displacement detection roller 26 is disposed in contact with the roller 26,
Displacement in the direction of arrow 40 or 41 is achieved by fan-shaped gear plate 20a.
And the detection gear 20b, and a signal is transmitted from the encoder 20 to the control circuit 50.

The control circuit 50 obtains the above-mentioned input signal and C
The signal is sent to the PU 52, and at the same time, the arithmetic signal from the CPU 52 is received and the output is sent. Hereinafter, each mechanical portion driven by the output signal of the control circuit 50 will be described. A quartz glass tube drive control device (hereinafter, drive control device) 9 includes a quartz glass tube mounting portion 10 for holding a quartz glass tube 1 for welding a flange portion on an outer peripheral surface by a chuck 8 and a quartz glass tube 1 at an axial center thereof. A motor 12 having a control means 15 for moving the quartz glass tube 1 back and forth, a motor 13 having a control means 16 for controlling the rotational speed of the quartz glass tube 1 in the outer peripheral direction, and the position of the opening end surface of the quartz glass tube 1 in the axial direction. To detect light, the light receiving portion 11b and the light emitting portion 11a
Is provided with the sensor 11.

The control means 15 of the motor 12 is the control circuit 5
The motor 12 is driven by the command signal of 0, and the motor 12 is controlled so as to stop the motor 12 by receiving the stop signal of the control circuit 50 by the signal of the light receiving portion 11b of the sensor 11. The control means 16 of the motor 13 is configured to drive the motor 13 in response to a command signal from the control circuit 50 to control the rotation of the quartz glass tube 1.

On the right side of the drive control device 9, a continuous extended body placement and delivery means 64 having a rack portion 64a is provided by a gear 59 controlled by a control means 60 including a motor.
It is slidable. A quartz glass plate 3, which will be described in detail below, is held in the continuous extended body placement and delivery means 64,
A member, a mechanism, etc. for sending out are arranged.

The quartz glass plate 3 is placed on the detection roller 21 which detects the feed amount of the quartz glass plate 3 by the feed roller 22 and the encoder 19, and is separated by a predetermined distance by driving the air cylinders 32 and 33. Of a pair of regulating rollers 28, 28 and 29, 2 arranged respectively
9 is driven, and the position is regulated by the regulation roller with both side surfaces extending in a strip shape being sandwiched.

Then, in the above-mentioned position regulation state, the air cylinder 34 is driven to press the quartz glass plate 3 from above by the pressing roller 23, and the feeding roller 22 sends out the quartz glass plate 3 and the detecting roller 21. Good detection condition is secured. Further, a signal from the control circuit 50 is sent to the control means 1
7, the rotation speed of the motor 14 is controlled, and at the same time, the rotation speed of the motor 14 is transmitted to a clutch 35 described later to apply a pressing force F to rotate the motor 14 with a constant torque.

An electromagnetic clutch 35 is arranged between the feed motor 14 for feeding the quartz glass plate 3 and the feed roller 22, and the torque state to the roller 22 can be adjusted by the connection state of the clutch. ing. The electromagnetic clutch 35 is arranged so that the shaft torque can be adjusted between the input and the output, and the holding force of the clutch plate is selected by adjusting the magnetic force, and the connection state, that is, the clutch engagement amount. Can be selected. When the feeding of the quartz glass plate 3 is stopped, the clutch 35 disconnects the feed roller 22 and the feed motor 14.

On the outer peripheral surface of the open end of the quartz glass tube 1, the cross section of the belt-shaped quartz glass plate 3 is arranged so that it can be pressed by a pressing force F as appropriate. That is, in the initial state, the tip end of the quartz glass plate 3 is inclined like a wedge from the upper surface, and the end face 3a having a cross-sectional area of approximately 2 × 30 mm is provided in the glass tube 1.
Is pressed against the outer periphery of the plate with a pressing force F of 300 to 400 g. During operation, the pressing force F is applied to the outer peripheral surface of the quartz glass tube 1 against the cross section of 10 × 30 mm. The pressing force F is preferably 350 g.

The displacement detection roller 26 and the drive controller 9
A burner control means 18 is provided between the burner control means 18 and the burner control means 18, and the first burner 6 and the second burner 7 include the end surface of the quartz glass plate 3 and the melting positions around the upper and lower sides thereof. It is arranged so that it can be heated and melted.

Next, one embodiment of the essential part of the mechanical portion of the present invention will be described with reference to FIGS. 4 and 5. Figure 1
2 is a sectional view taken along the line AA of FIG. In these drawings, a quartz glass tube mounting portion 10 is provided in a drive control device 9, a quartz glass tube 1 is held on a chuck 8 in front of the glass tube mounting portion 10, and the quartz glass tube 1 is held. A sensor 11 that detects a position in the axial direction is arranged. End face 1b of the quartz glass tube 3
The side faces 3b of the quartz glass plate 3 whose end faces 3a contact the outer periphery 1a of the quartz glass tube 1 are the rollers 24, 25 and the feed rollers 22 arranged on the continuous extended body placement and delivery means 64. , And the detection roller 21.

On the side surfaces 3a and 3b of the quartz glass plate 3,
Pressing rollers 28a and 28b are provided so as to be able to come into contact with and separate from the side surface by driving the air cylinder 32, and holding rollers 29a and 29b are provided so as to be brought into contact with and separated from the side surface by driving the air cylinder 33. There is. The burner mount 5 provided with the first burner 6 is disposed on the drive control device 9 side of the continuous extended body placement and delivery means 64, and the third burner is provided on the left side of the drive control device 9. 57
Are attached to the burner control means 58.

In order to better understand the above-mentioned structure, referring to FIG. 2, the mounting base 67 fixed to the floor (not shown) by the legs 68 has a rail (not shown) fixed along its extending direction. The continuously extending body placement and delivery means 64 is slidably arranged by the rail.

A long hole-like space is formed in the central portion of the mounting plate 67, and the motor 14 and the clutch 35 are inserted through the space.
Are arranged in the continuous extension body placement and delivery means 64. The burner mount 5 is fixed to the continuous extended body placement and delivery means 64, and the first burner 6 and the second burner 7 are fixed to the mount 5. Behind the roller 25, a pair of gripping means 61 is arranged on both sides so that the glass plate 3 can be gripped from the width direction, and the gripping means 61 has a member having a high friction coefficient such as rubber on the gripping surface. The grip portion 61a is configured to be movable between a protruding position and a separated position where the grip portion 61a comes into pressure contact with the side surface of the glass plate 3 in response to a command signal from the control circuit 50.

On the side surface of the continuous extended body placing and sending means 64,
The rack portion 64a is cut, and the rack portion 64a and the gear 59 fixed to the drive shaft of the motor 62 mesh with each other so that the continuous extended body placement and delivery means 64 can slide.

The feed roller 22 is rotatably connected by a belt 38 to one rotation shaft of an electromagnetic clutch 35 provided on the lower side of the continuous extension body placement and delivery means 64, and the other via a clutch portion. The rotating part of is connected to the feed motor 14. Further, the detection roller 21 is arranged so as to come into contact with the back surface of the glass plate 3, and an encoder 19 for detecting the number of rotations of the detection roller 21 is arranged. The detection roller 21 is connected to the torque sensor 36 via the belt 37.

The mounting plate 39 mounted on the upper surface of the continuous extended body placing and sending means 64 is provided with an air cylinder 34 on the upper part thereof, and the air cylinder 34 is pressed downward by a predetermined pressing force by the operation of the air cylinder. Detection arm mounting plate 4 pressed by
2, the detection arm mounting plate 42 is provided with a pressing roller 23 that presses an intermediate portion of the feed roller 22 and the detection roller 21 from above to stabilize the contact state between the both and the quartz glass plate 3. It is set up. Further, a detection arm 27 having a detection roller 26 at its tip for contacting the upper surface of the quartz glass plate 3 to detect displacement and an encoder 20 for detecting the movement amount of the detection arm 27 are arranged on the detection arm mounting plate 42. It is set up.

Therefore, the control circuit 50 includes the glass tube 1
Is calculated and the output amount is sent to the grip means 61. Further, the continuous extended body placing and sending means 64 has a rack portion 64a, and the rack portion 64a has a gear control means 60 having a built-in motor.
Since it is meshed with the drive gear 69 of
The rotation amount of the glass tube 1 or the delivery amount of the glass plate 3 is calculated and the output can be delivered to the gear control means 60.

Next, the operation of this embodiment configured as described above will be described. During operation, various parameters are input to the control circuit 50 from an input device (not shown). They are the diameter of the glass tube 1 to be welded and the wall thickness dimension of the tube, the plate thickness and width dimension of the glass plate 3, the initial value of the control pulse frequency of the motor 13 for rotating the glass tube 1, the glass plate 3 The initial value of the control pulse frequency of the feed motor 14 and the initial value of the clutch 35 that is interposed between the motor 14 and the feed roller 22 to control the transmission torque. CPU5
2, the required rotation amount of the glass tube 1, the required delivery amount of the glass plate 3 and the like are calculated from these data, and the movement amount of the continuous extension body placement delivery means 64, the movement timing, the driving timing of the gripping means 61, etc. Is determined.

In FIG. 4, when the quartz glass tube 1 is attached to the chuck 8 of the quartz glass tube attaching portion 10, the opening end face of the glass tube 1 is at the position 1b '. In addition, the end surface of the quartz glass plate 3 placed on various rollers has a predetermined 3
It is set to the position a '. When a switch on a control plate (not shown) is pressed to generate a start signal 55, the control circuit 50 receives the signal and sends a start signal to the control means 15 of the motor 12 (FIG. 3). Motor 1 by the start signal
2 starts, and the quartz glass tube mounting portion 10 is indicated by an arrow 43 in FIG.
Start moving in the direction of.

When the end surface 1b of the quartz glass tube 1 reaches the position indicated by the solid line, the light receiving portion 11b of the sensor 11 sends a signal to the control circuit 50, and the quartz glass tube mounting portion 10 stops at that position. In synchronization with the start signal, the control circuit 50 drives the air cylinders 32 and 33 to cause the pair of pressing rollers 28a and 28b and the pressing rollers 29a and 29a.
b is pressed against the side surfaces 3c and 3b of the quartz glass plate 3,
The position of the quartz glass tube 1 is regulated so as to match the end surface 1b of the quartz glass tube 1.

Next, the control circuit 50 drives the cylinder 34 and applies a predetermined pressing force to the detection arm mounting plate 42 on which the pressing roller 23 and the encoder 20 are mounted. Then, a signal is sent to the clutch 35 to connect it, and
The motor 14 is started by the control means 17, and the roller 22
The quartz glass plate 3 is sent by and the sending amount is measured via the encoder 19. When the glass plate 3 is fed from the predetermined position 3a 'in FIG. 4 by a predetermined feed amount,
The control circuit 50 brings the clutch 35 into a half-clutch state, and the end surface 3a of the glass plate 3 contacts the outer circumference of the glass tube 1 and stops.

Next, the first burner 6 and the second burner 7 start heating and melting the peripheral portion of the glass plate 3 including the end surface 3a. The clutch 35 is synchronized with this heating operation.
To connect with a predetermined torque M,
The motor 14 is started by the control means 17, and the roller 22
Thus, the quartz glass plate 3 is sent out, and the sending amount is measured again via the encoder 19. When the outer periphery of the glass tube 1 and the end portion including the end surface 3a of the glass plate 3 are melted, both are welded, but the motor 13 rotates in synchronization with the welding to move the glass tube 1 in the upper counterclockwise direction in FIG. Rotate.

Now, the end face 3a of the quartz glass plate 3 is brought into contact with the outer periphery of the tubular portion of the quartz glass tube 1 by applying a predetermined torque, and the tip portion of the continuous extension body including the end face is heated and melted. . At this time, when the pressing force for pressing the continuous extension body in the direction of the object to be welded is low, the molten portion of the continuous extension body is not sufficiently pressed to the welded portion to be welded to the object to be welded. The internal pressure of is low, and it will be welded including air bubbles.

Further, when the pressing force is high, the melted tip portion of the continuous extension body is pressed by the pressing force and flows in the width direction of the continuous extension body, so that it is more than necessary on the outer periphery of the workpiece. Since it is welded in the width of, the amount of mechanical shaving after the completion of welding is increased, and since the continuous extended body is welded thinly by the amount of flowing in the width direction, it is possible to obtain the required thickness dimension. Can not.

Further, when the outer periphery of the object to be welded is not a perfect circle and has a surface having a diameter larger or smaller than the center of rotation of the object to be welded or an outer peripheral surface having irregularities, the continuous extension body is subjected to a predetermined torque. By sending, when the outer peripheral surface of the workpiece is changed and the outer peripheral surface is closer to the melting end portion of the continuous extended body than the reference value, the continuous extended body passes through the molten portion of the continuous extended body. By being pushed back, the delivery load to the continuous extension body increases, and the supply amount of the continuous extension body decreases.

Further, when the outer peripheral surface of the workpiece is changed so that the outer peripheral portion is farther than the reference value from the melting end of the continuous extended body, the delivery load to the continuous extended body becomes light and the pressing force is slightly increased. The number of continuous extension products will increase. Therefore, by applying a predetermined pressing force to the continuously extending body, it is possible to automatically adjust even if the object to be welded is not a perfect circle and the surface shape changes.

Therefore, according to the present invention, since the continuous extension body is delivered in the direction of the object to be welded with a predetermined torque, it is welded to the object to be welded with a predetermined thickness and is machined after welding is completed. The amount can be minimized.

However, when the pressing force applied to the continuous extended body is reduced to less than necessary, as described above, the welded portion of the object to be welded contains bubbles, and when the pressing force increases more than necessary, the welded portion is increased. It is not possible to obtain the required thickness dimension of.

Therefore, it is desirable that the torque fluctuation of the continuous extension body is detected and adjusted to the predetermined torque. With this configuration, it is possible to adjust to a predetermined torque even if the output torque of the drive source fluctuates, or the torque of the continuous extension body fluctuates due to an increase in the frictional force of another drive mechanism. it can.

When the outer circumference of the glass tube 1 which is known in advance is rotated once, a flange portion is formed on the outer circumference of the glass tube 1, but the clutch 35 is formed before the glass tube 1 completes one rotation.
Is released, the motor 14 is stopped, and the holding means 61 operates to hold the glass plate 3 in the width direction, so that the feeding of the glass plate 3 is stopped. Since the glass tube 1 rotates in that state, the glass plate 3 is automatically cut from the molten portion. Then, the heating of both burners is stopped.

Therefore, the time when both burners heat is
With a slight time difference, the glass tube 1 is rotationally driven so as to be synchronized with an appropriate molten state, and the delivery of the glass plate 3 is stopped slightly before one rotation of the glass tube 1 is completed, and the outer circumference of the glass tube 1 is stopped. It is desirable to control so that the end surface of the glass plate 3 welded to the surface and the melted portion to be cut coincide with each other. The rotation amount of the glass tube 1 is calculated by the outer diameter and rotation speed of the glass tube 1 and the plate thickness of the glass plate 3 which are known in advance.
The feed amount may be detected by and calculated from the data. Therefore, the position where the glass plate 3 is cut is controlled by the feed amount of the glass plate 3 or the rotation amount of the glass tube 1.

Further, during the above-described welding process, the pressing torque of the glass plate 3 is controlled by the clutch 35. This is because the torque amount received by the feed roller 22 on the glass plate 3 is applied to the lower surface of the glass plate 3. The detection roller 21 in contact with the clutch 35 detects and transmits the amount to the control circuit 50, thereby changing the connection state of the clutch 35 for control.

Also, the tubular portion of the glass tube 1 is rotated in the tubular outer peripheral direction, and the glass plate 3 is sent out in the tubular portion direction, so that the amount of heating and melting is equal to the amount of winding and welding to the tubular portion. Then, the quartz glass plate 3 is not displaced in the direction (arrows 40 and 41) intersecting the delivery direction of the continuous extension body.

When the rotation speed of the quartz glass tube 1 is faster than the amount of welding to the glass tube 1, the quartz glass plate 3 is pulled by the quartz glass tube 1, and the quartz glass plate 3 bends in the direction of arrow 40, and the glass tube 1 If the rotation speed is slow, the amount of melting is large and the force for attracting the solid portion of the quartz glass plate becomes weak, and the quartz glass plate 3 is displaced in the direction of the arrow 41.

The displacement amount is detected, and the feed amount of the glass plate 3 is controlled within a predetermined range according to the displacement amount, the feed amount of the glass plate 3 per unit time is controlled within a predetermined range, and heating is performed. The amount of melting and the amount of winding and welding on the tubular portion can be made equal.

Further, in this embodiment, the continuous extension body 3 is
In addition to the control circuit 17 and the motor 14 for controlling the feeding amount of the glass tube 1, a speed control means (motor control circuit) 16 for controlling the moving speed of the molten portion of the glass tube 1 is provided. Therefore, the displacement amount is detected, the moving speed of the melting portion is controlled, the feeding amount of the glass plate 3 per unit time is controlled within a predetermined range, and the heating and melting amount and the winding and welding amount on the tubular portion are controlled. Can be equal.

As described above, the glass plate 3 can be automatically cut by stopping the feeding of the glass plate 3, but at that time, both burners are configured so that the melting position of the object to be heated can be adjusted. can do. That is, the motor 62 can be rotated to move the continuous extended body placement and delivery means 64 to the right in FIG. 5, and the burner mount 5 can be moved. When the heating means is moved in a direction away from the glass tube 1 in synchronization with the stoppage of the glass plate 3 by feeding the glass plate 3 by a predetermined amount, the end surface of the glass plate is located at a position sufficiently separated from the outer diameter of the formed flange portion. Can be stopped and disconnected. Therefore, the end of the heating of the heating means is delayed and the end face of the glass plate is not melted and drips onto the outer peripheral surface of the flange portion, so that the outer peripheral surface is not contaminated.

Next, with reference to FIG. 5, the operation of forming the flange portion by stacking the glass plate 3 on the outer peripheral surface of the glass tube 1 will be described. When the end surface 3a of the quartz glass plate 3 is brought into contact with the outer periphery of the quartz glass tube 1 and the quartz glass tube 1 is rotated a plurality of times, the quartz glass plate 3 can be wound in a stack. At this time, the glass tube 1 is rotated to move the quartz glass plate 3 into
When the flange portion 2a is wound to form the flange portion 2a, the flange outer diameter increases by the plate thickness of the flange 2a.

Therefore, when the outer peripheral speed of the glass tube 1 increases, the quartz glass plate 3 is pulled by the quartz glass tube 1, and the quartz glass plate 3 bends upward, and the bending amount is detected by the encoder 20, and the outer periphery of the flange 2a is detected. It is possible to reduce the peripheral velocity of the glass plate 3 to match the amount of the glass plate 3 heated and melted with the amount of the glass tube 1 wound and welded. Further, when the glass plate 3 is wound once, the flange 2b is formed, and the outer peripheral speed of this flange is reduced to form the flange 2c in accordance with the previous peripheral speed.

At this time, as the flange portion overlaps with 2b and 2c, the flange of the glass tube 1 has a larger diameter, and the position requiring heating and melting changes to the right as the diameter changes, and the first burner 6 And the burner injection positions of the second burner 7 are 70A, 71A, 72A, and 70B, 71.
B and 72B are changed to follow the heating and melting position.

In this way, the rotational speed of the tubular portion can be controlled according to the increase in the diameter of the flange portion of the glass tube 1 to equalize the rotational speed of the diameter around which the glass plate 3 is wound. Due to the increase in the speed of the outer periphery of the flange at that time, the glass plate 3 is not wound around the outer periphery of the flange while the expansion and contraction of the glass plate 3 is insufficient.

During the above-described multi-winding welding process, the rotation of the glass tube 1 is speed-controlled by the control means 16. That is, the encoder 20 detects the displacement (arrow 40 or 41) of the detection roller 26 that is in contact with the upper surface of the glass plate 3 and transmits the amount to the control circuit 50 to control the control circuit 16. The rotation of the glass tube 1 is controlled.

Therefore, even if one of the feed amount of the continuous extension body or the moving speed of the melting portion cannot be adjusted, the other can be adjusted, and the adjustment range is widened, and the adjustment is easy. Becomes In particular, when the glass plate 3 is stacked and wound, when the second roll is wound on the front end portion of the first roll, the step shape of the front end portion where the front end of the glass plate 3 is welded is short. It is necessary to continuously reduce the rotation speed of the glass tube 1 during the period, but the glass tube 1 during the short period is decelerated to the speed of the second roll, and the feed amount of the glass plate 3 is changed by the clutch 35. The feed amount per unit time can be reduced by controlling.

As described in detail above, according to the present embodiment, the end face of the continuous extension body is brought into contact with the outer periphery of the object to be welded, and the tip portion of the continuous extension body including the end face is heated and melted. Since it is configured to be welded to the object to be welded and to send the continuous extended body at a predetermined torque in the direction of the object to be welded, it is not welded including bubbles, and the required thickness dimension is obtained. It is possible to reduce the amount of mechanically scraped off after the completion of welding, and even if the distance between the outer peripheral surface of the workpiece and the melting end of the continuous extension body fluctuates from the reference value. It can be absorbed by the predetermined torque and can be automatically adjusted even if the object to be welded is not a perfect circle or the surface shape changes.

That is, it is possible to perform welding on an object to be welded in a given shape in a given welding state, without requiring a high level of manual skill and skill, with a small amount of materials and processing, and economically performing welding.

Next, a second embodiment for cutting the glass plate 3 will be described. When the feeding of the glass plate 3 of a predetermined amount is completed, the grip portion 61a of the gripping means 61 grips the side surface of the glass plate 3 and the motor 62 further retracts to the right, so that the glass plate 3 moves to the right, Be disconnected. In synchronism with this cutting, the first burner 6 and the second burner 7 stop operating, the motor 62 reverses after cutting, the continuous extended body placing and sending means 64 moves leftward, and both burners are initialized. Return to position.

The motor 14 is stopped and the clutch 35 is disengaged in synchronism with the operation of the gripping means 61. Even if there is a delay in the stopping and disengaging operation, the right side of the continuous extension body placing and sending means 64 is reached. If the row retreat speed is set higher than the delivery speed of the glass plate 3, the cutting of the glass plate 3 will not be delayed and the glass plate 3 can be cut reliably.

In the above-described embodiment, the rotation amount of the glass tube 1 is calculated and obtained to control the delivery of the glass plate 3. However, the glass plate 3 corresponding to the rotation amount of the glass tube 1 is controlled. The amount of delivery is detected and the glass tube 1
May be stopped or the delivery of the glass plate 3 may be stopped. Further, in the present embodiment, the quartz glass tube and the quartz glass plate are heated and melted and welded to each other, but the present invention is not necessarily limited to this, and other materials having the same melting temperature can be used. It goes without saying that they may be glass or metal comrades.

[0083]

As described above, the apparatus invention according to the first aspect of the invention is provided with the feeding means of the continuous extending body for feeding the end surface of the continuous extending body so as to contact the workpiece with a predetermined torque. Since it does not contain air bubbles and is not welded, the required thickness dimension can be obtained, the amount of mechanical shaving can be suppressed to a small amount after welding is complete, and it can also be continuous with the outer peripheral surface of the workpiece. Even if the distance between the melted end of the extended structure and the melted end fluctuates from the reference value, it can be absorbed by the specified torque, and even if the workpiece is not a perfect circle, the surface shape changes automatically can do.

Further, the apparatus invention according to claim 2 has the effect of claim 1 and is capable of adjusting the torque transmitted from the drive source and the torque detecting means for detecting the torque fluctuation of the continuous extension body. Since the clutch means and the clutch control means for controlling the transmission output of the clutch means are provided and configured to adjust to the predetermined torque, the output torque of the drive source fluctuates, or another drive mechanism. Even if the frictional force of 1 increases and the torque of the continuous extended body fluctuates, the torque can be adjusted to a predetermined torque.

Further, the apparatus invention according to claim 3 has the effect of claim 1, and a calculating means for determining the delivery amount of the continuous extension body or the movement amount of the molten portion of the workpiece. A cutting means for stopping the feeding operation of the continuous extended body, and the feeding amount of the continuous extended body is determined, and the feeding of the continuous extended body is stopped, so that a special cutting means is provided. Even if it is not provided, the continuous extension body can be cut by merely stopping the delivery.

Further, the apparatus invention according to claim 4 has the effect of claim 1, and further has a calculating means for obtaining a predetermined delivery amount of the preceding continuous extension body or a movement amount of the workpiece to be welded, At this time, since the continuous extension body is configured to have the retracting means for pulling it back in the direction opposite to the feeding direction, the cutting is easier and the continuous extension body is not melted excessively.

According to a fifth aspect of the present invention, the end face of the continuous extension body is brought into contact with the outer periphery of the object to be welded, and the tip portion of the continuous extension body including the end face is heated and melted to be welded. Since it is configured to be welded to an object and to be delivered with a predetermined torque in the direction of the object to be welded, it is possible to obtain a required thickness dimension without welding including bubbles. The amount of mechanical shaving after the completion of welding can be suppressed to a small amount, and even if the distance between the outer peripheral surface of the workpiece and the melting end of the continuous extension body fluctuates from the reference value, the predetermined torque Therefore, even if the object to be welded is not a perfect circle, it can be automatically adjusted even if the surface shape changes.

The method invention according to claim 6 has the effect of claim 5, and is configured to detect the torque fluctuation of the continuous extension body and adjust the torque to the predetermined torque. It is possible to adjust the torque to a predetermined value even if the output torque of the power source fluctuates or the frictional force of another drive mechanism increases to cause a torque fluctuation of the continuous extension body.

Further, the method invention according to claim 7 has the effect of claim 5 and obtains a predetermined delivery amount of the continuous extension body or a movement amount of the welded object to obtain the continuous extension body. Since the feeding is stopped, the cutting can be performed only by stopping the feeding of the continuous extension body without providing a special cutting means.

Further, the method invention according to claim 8 has the effect of claim 5, and obtains a predetermined delivery amount of the continuous extension body or a movement amount of the workpiece to be welded, and when stopping, Since the continuous extension body is configured to be pulled back in the direction opposite to the delivery direction, it becomes easier to cut,
There is no extra melting of the continuous extension.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of a mechanism portion according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a block configuration diagram according to an embodiment of the present invention.

FIG. 4 is an operation explanatory diagram illustrating an initial operation according to the present embodiment.

FIG. 5 is an operation explanatory view of forming a flange portion by overlapping winding.

FIG. 6 is a schematic configuration diagram showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Quartz glass tube (object to be welded) 3 Quartz glass plate (continuous extension body) 6 1st burner (heating means) 7 2nd burner (heating means) 9 Quartz glass tube drive controller 10 Quartz glass tube attachment part 12, 13, 14 Motors 15, 16, 17 Motor control circuits 19, 20 Encoder 26 Detection roller 27 Detection arm 30, 31 Holding roller mounting portions 32, 33, 34 Air cylinder 35 Clutch (clutch means) 36 Torque sensor 39 Mounting plate 42 Detection Arm mounting plate 61 Grasping means (stopping means) 64 Continuously extended body placement sending means (sending means)

Front page continuation (72) Inventor Shoji Takahashi 1357-3 Fujidan, Kiyoike, Tendo, Yamagata Yamashin Shinetsu Quartz Co., Ltd. (56) Reference JP-A-8-178169 (JP, A) JP-A 10-259032 (JP, A) JP-A-3-115131 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C03B 23/00-23/26 C03B 35/00-35 / 26 C03B 20/00

Claims (8)

(57) [Claims] 1. A feed control device for a continuous extended body in which a continuous extended body having a melted tip is pushed out to a welded portion of a workpiece by a predetermined torque, and the welded portion is held while the welded portion is held. An object to be welded holding means that is movable in the delivery direction of the continuous extension, and a delivery means for the continuous extension that sends the end surface of the continuous extension to the object to be welded with a predetermined torque. A feeding control device for a continuous extension body that is pressed and delivered with a predetermined torque, comprising: a heating unit that heats and melts a leading end portion of the continuous extension body including the end face. 2. A torque detecting means for detecting a torque fluctuation of the continuous extension body, a clutch means for adjusting a transmission force from a drive source, and a clutch control means for controlling a transmission output of the clutch means. The feed control device for a continuous extension body that is pressed and delivered with a predetermined torque according to claim 1, wherein the feed torque is adjusted to the predetermined torque. 3. A continuous means is provided, which comprises a computing means for obtaining a delivery amount of the continuous extension body or a movement amount of the molten portion of the workpiece, and a stopping means for stopping the delivery operation of the continuous extension body. 3. The continuous extension body which is pressed and delivered with a predetermined torque according to claim 1, wherein the delivery amount of the extension body or the movement amount of the molten portion is obtained, and the delivery of the continuous extension body is stopped. Feed control device. 4. A retracting means for determining a predetermined delivery amount of the continuous extension body or a movement amount of the object to be welded, and pulling back the continuous extension body in a direction opposite to the delivery direction when stopped. The feed control device for a continuous extension body that is pressed and delivered with a predetermined torque according to claim 1 or 2. 5. A feed control method for a continuous extended body, wherein a continuous extended body having a melted tip is pushed out to a welded portion of the welded article with a predetermined torque. The end face is brought into contact with the end face of the continuous extension body including the end face to be heated and melted to be welded to an object to be welded, and the continuous extension body is delivered at a predetermined torque in the direction of the object to be welded. A feed control method for a continuous extension body that is pressed and delivered with a predetermined torque. 6. The feed control method for a continuous extension body that is pressed and delivered at a predetermined torque according to claim 5, wherein a torque fluctuation of the continuous extension body is detected and adjusted to the predetermined torque. 7. The predetermined torque according to claim 5 or 6, wherein a predetermined delivery amount of the continuous extension body or a movement amount of the object to be welded is obtained, and the delivery of the continuous extension body is stopped. A feed control method for a continuous extension body that is pushed out. 8. A predetermined delivery amount of the continuous extension body or a movement amount of the object to be welded is obtained, and when the continuous extension body is stopped, the continuous extension body is pulled back in a direction opposite to the delivery direction. 7. The method for controlling the feeding of a continuous extended body which is pushed out with a predetermined torque according to claim 5 or 6.