KR20020036568A - multitude welding machine for sealed radiation source - Google Patents

Abstract

PURPOSE: A sealed source welding apparatus is provided to improve the productivity and to reduce the manufacturing cost of sealed source by welding various kinds of sealed sources using one welding apparatus. CONSTITUTION: A sealed source welding apparatus(101) includes a base plate(103), a collet chuck(110) for vertically fixing sealed sources and a collet chuck fixing member(130) for fixing the collet chuck(110). A rotational force is applied to the collet chuck fixing member(130) by a driving motor(150) so as to rotate the collet chuck fixing member(130) together with the collet chuck(110) and the sealed sources. A cap supporting section(190) is provided to rotatably fix capsule caps receiving the sealed sources. A welding torch position adjusting section(170) is provided to adjust the position of a welding torch(107).

Description

Mulled welding machine for sealed radiation source

The present invention relates to a sealed source welding apparatus for welding and sealing a metal capsule in which a radiation source is embedded, and more particularly, each of which handles a sealed source capsule of each specification for constituting various types of sealed sources. By providing a collet, it is possible to produce and weld various types of sealed sources with a single welding device, thereby improving the productivity of the sealed source and reducing the manufacturing cost of the sealed source. The present invention relates to a multiple welding apparatus.

As is well known, a sealed source is a source source sealed with a source capsule, and is widely used for industrial and therapeutic purposes. In particular, when the source diameter is small and the specific radioactivity is high, the utility is increased. Therefore, when the radiation source is mounted on the treatment device and the radiation source is directly inserted between the cancer tissues, and the industrial inspection or measurement of the product at the production site in the production site. It is used in the back and is gradually increasing.

1, 2 and 3 show representative sealed sources that are welded and sealed with source capsules, which are used for industrial and therapeutic purposes, respectively.

FIG. 1 shows a C0-60 sealed source 1 used for measuring the thickness and the like. The sealed source 1 has an internal source capsule 11 for firstly sealing a C0-60 radiation source, and The inner source capsule 11 is composed of an outer source capsule 15 is sealed by the injection. At this time, the inner source capsule 11 and the outer source capsule 15 is welded and sealed with the inner capsule cap 12 and the outer capsule cap 16, respectively, the outer source capsule 15 is a connector for connecting to the measuring device 15a is formed.

Fig. 2 shows an Ir-192 sealed source 3 used for non-destructive testing and the like, which has an internal source capsule 31 for sealing the Ir-192 radiation source primarily and an interior thereof. The source capsule 31 is composed of an external source capsule 35 which is injected and sealed. In addition, the inner source capsule 31 and the outer source capsule 35 are welded and sealed with the inner capsule cap 32 and the outer capsule cap 36, respectively, the outer capsule cap 36 is a connector for connecting to the measuring device 36a is formed.

3 shows an Ir-192 sealed source 5 used for treatment, the sealed source 5 being a source capsule 51 in which a disk-shaped Ir-192 radiation source is sealed so that it can be suitably used in a remote control brachytherapy unit. ), A drive cable 55 connected in a longitudinal direction to the capsule cap 52 welded and sealed to the source capsule 51, and a connector coupled to the other end of the drive cable 55 to which the source capsule 51 is connected. A technique such as sealed source 5 is shown in US Pat. No. 4,861,520, consisting of (57).

Such a sealed source (1) (3) (5) in the inner source capsule (11) (31) in the case of consisting of a double capsule as shown in Figures 1 and 2 by transferring the neutron-radiated radiation source from the reactor to a hot cell (hotcell) In the case of a single capsule as shown in FIG. 3, an appropriate amount is introduced into the source capsule 51, and then the source capsules 11, 31, and 51 are covered with the capsule caps 12, 32, and 52. ) And the interior of the capsule cap 12, 32, 52 by welding. In addition, in the case of a double capsule, the inner source capsules 11 and 31, which are hermetically welded as described above, are introduced into the outer source capsules 15 and 35 and then the outer capsule caps 16 and 36 again. The welding is carried out by encapsulating the double radiation source.

By the way, in producing each sealed source (1) (3) (5) as described above, each source capsule (11) (15) (31) (35) (51) and capsule caps of various sizes and shapes In order to weld and seal (12) (16) (32) (36) (52), it is necessary to manufacture five kinds of jig or welding device for fixing the source capsule. In addition, the productivity of the sealing source is reduced as well as the production of the various sealing source welding equipment, etc., there is a problem that increases the production cost of the sealing source.

Accordingly, the present invention has been made in view of the above-mentioned problems, and by providing each collet for handling a source capsule of each specification for constituting various types of sealed sources, a variety of types of sealed sources can be obtained with one welding device. It is an object of the present invention to provide a sealed source multiple welding device that enables production welding to improve the productivity of the sealed source as well as to reduce the production cost of the sealed source.

1 is a cross-sectional view showing a C0-60 sealed source used in the industry for measuring the thickness and the like.

Figure 2 is a cross-sectional view showing an Ir-192 sealed source used for industrial purposes, such as non-destructive testing.

Figure 3 is a cross-sectional view showing a Ir-192 sealed source used for treatment.

Figure 4 is a partial cutaway front view showing a sealed source welding apparatus according to a preferred embodiment of the present invention.

Figure 5 is a plan view showing a sealed source welding apparatus according to an embodiment of the present invention.

Figure 6 is an exemplary view showing the application structure of each collet chuck in the sealed source welding apparatus according to an embodiment of the present invention.

Figure 7 is an exploded cross-sectional view showing a part of the cleat chuck rotary fixture in the sealed source welding apparatus according to an embodiment of the present invention.

8 is a front view showing an operating state of the cap support in the sealing source welding apparatus according to an embodiment of the present invention.

9 is a plan view of FIG. 8.

10 is an exemplary view showing a welding state of the source capsule using a sealed source welding device according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

101: sealing source welding device 107: welding torch

110: collet chuck 130: collet chuck rotating fixture

131: chuck housing 133: spindle

135: sleeve 137: fixed cap

139: chuck fixing cylinder 150: drive motor

170: welding torch position adjusting unit 171: vertical transfer unit

175: horizontal transfer unit 190: cap support

191: cam housing 193: cam bar

196: connection rod 197: push pin

198 spring 199 cam-by-song cylinder

According to a feature of the present invention for achieving the above object, in the sealed source welding apparatus for welding the capsule caps covered in a plurality of source capsules with a welding torch, the collet chuck for receiving and fixing each of the source capsules vertically; And a collet chuck rotating fixture fixed to the collet chuck and installed rotatably about a vertical line, and providing rotational force to the collet chuck rotating fixture to rotate the source capsule together with the collet chuck; Cap support means for rotatably fixing the cap of the cap to the source capsule fixed to the collet chuck from the top, and welding to adjust the position of the welding torch to the welding point of the source capsule and capsule cap fixed to the collet chuck Provided is a sealed source welding device comprising torch position adjusting means.

At this time, according to an additional feature of the present invention, the collet chuck fixed body is mounted on the upper portion of the base plate at a predetermined interval through the fixing bar, and the bearing in the center of the chuck housing centered on the vertical direction A spindle that is rotatably installed, and a seating hole which is vertically coupled to the center of the spindle to be seated to insert and collet the collet chuck in the vertical direction, and contracts the collet of the collet chuck toward the center when moved upward. And a fixing cap for fixing the collet chuck seated in the seating hole of the sleeve to the spindle, and a chuck fixing cylinder for vertically moving the sleeve.

And, the welding torch position adjusting means is installed in the vertical direction and the vertical conveying unit constituting the vertical conveying body that is moved up and down during rotation, and is mounted to the vertical conveying body in the horizontal direction from the collet chuck centerline And a horizontal conveying unit constituting the horizontal conveying body for conveying.

In addition, the cap support means is a cam housing which is mounted at a predetermined interval on the upper portion of the base plate via a fixed bar, and installed vertically to the center of the cam housing cam bar that rotates at a predetermined angle when moving up and down, on the top of the cam bar Push pins installed vertically at the ends of the horizontally coupled connecting rods and moving downward on the collet chuck upper center line when the cam bar descends to press the capsule cap upper surface of the source capsule fixed to the collet chuck downwards. And a cam-by-feed cylinder for moving the cam bar up and down.

Hereinafter, an embodiment of the present invention will be described in more detail based on the accompanying drawings.

4 and 5 are a front view and a plan view of a sealed source welding apparatus 101 according to a preferred embodiment of the present invention.

Sealing source welding apparatus 101 according to a preferred embodiment of the present invention is a capsule cap (12), (16) in each of the sealing source (1) (3) (5) shown in Figs. 32, 36, 52, caps 11, 15, 31, 35, 51 and capsule caps 12, 16, 32, 36 and 52 of various sizes and shapes. ) Is to weld and seal the base plate 103 and the collet chuck 110 for accommodating and fixing the respective source capsules 11, 15, 31, 35, and 51 vertically, respectively. And, the collet chuck 110 to fix the collet chuck 110 is installed rotatably around a vertical line, and the collet chuck 110 to provide a rotational force to the collet chuck fixed body 130 Drive motor 150 for rotating the source capsules 11, 15, 31, 35 and 51 together with the source capsules 11, 15 and 31 fixed to the collet chuck 110. Cap support portion 190 for welding the capsule caps 12, 16, 32, 36 and 52, which are covered by the 51, from the top to be rotatable. Said capsules 11, 15, 31, 35, 51 and capsule caps 12, 16, 32, 36, 52 with the position of the teeth 107 fixed to the collet chuck 110. It consists of a welding torch position adjusting unit 170 to adjust to the welding point of.

In other words, the collet chuck 110 has a loading groove for inserting and fixing the source capsules 11, 15, 31, 35, and 51 from the top in the upper center of the collet 111 radially divided from the top. 113 is formed, the inclined surface 115 inclined downward toward the luncheon is formed on the outer circumference, the locking step 117 is horizontally cut toward the center from the upper end of the inclined surface 115 is formed.

At this time, the collet chuck 110 is composed of five structures that can accommodate each of the five source capsules (11, 15, 31, 35, 51) as shown in FIG. In FIG. 6, reference numerals 110 and 113 are designated a, b, c, d, and e to refer to the five collet chucks 110 according to the source capsules 11, 15, 31, 35, and 51. 6a shows a collet chuck 110a having a loading groove 113a in which an internal source capsule 11 of a Co-60 sealed source 1 used for industrial purposes is loaded. 6b shows a collet chuck 110b having a loading groove 113b in which an external source capsule 15 of a Co-60 sealed source 1 used for industrial purposes is loaded, and FIG. 6 shows a collet chuck 110c in which a loading groove 113c in which an internal source capsule 31 of an Ir-192 sealed source 3 is used is formed, and FIG. 6D shows an Ir-192 sealed source used for industrial purposes. 3) shows a collet chuck 110d in which a loading groove 113d is formed in which an external source capsule 35 is loaded, and FIG. 6E shows a source capsule 51 of an Ir-192 sealed source 5 used for treatment. ) Loaded Shows the collet chuck 110e in which the loading groove 113e is formed. That is, the loading groove 113 of each collet chuck 110 is source capsules 11, 15, 31, 35 (welded with the capsule caps 12, 16, 32, 36, 52) ( In order to position the welding position of 51 on the same line, each of the source capsules 11, 15, 31, 35 and 51 has a shape, a diameter, and a depth. In addition, a source injection holder (120a) (120c) (120e) is coupled to the upper portion of the collet chuck 110 for loading the source capsule (11) (31) (51) into which a small radiation source is directly injected, wherein the source The input holders 120a, 120c, and 120e have a funnel structure for guiding the small radiation source into the source capsules 11, 31, 51 easily.

And, the collet chuck fixed body 130 is a chuck housing 131 is mounted at a predetermined interval through the fixing bar 140 on the upper portion of the base plate 103, as shown in Figure 4 and 7, and The spindle 133 is rotatably installed around the vertical direction with the bearing 132 at the center of the chuck housing 131, and the collet chuck 110 is coupled to the center of the spindle 133 so as to be movable upward and downward. A seating hole 134 for inserting and seating in the vertical direction is formed and a sleeve 135 which contracts the collet 111 of the collet chuck 110 toward the center when it is moved upwardly, and a seating hole of the sleeve 135. It consists of a fixing cap 137 for fixing the collet chuck 110 seated on the 134 to the spindle 133, and a chuck fixing cylinder 139 for moving the sleeve 135 up and down.

In addition, the fixed cap 137 is formed in a cylindrical shape, the lower end of the inner circumference is formed with a female screw 137a for engaging with the male screw 133a formed on the upper outer circumference of the spindle 133, the upper end is bent toward the center collet The catching jaw 117 of the chuck 110 and the engaging piece 138 coupled from the top is formed in an annular shape. The inclined surface 136 of the collet chuck 110 and the inclined surface 136 corresponding to the inclined surface 115 of the collet chuck 110 are extended upward to the inclined surface of the collet chuck 110 when the sleeve 135 is moved upward. Through the 115 is made to press the collet 111 toward the center.

Accordingly, the collet chuck rotating body 130 is fixed to the collet chuck 110 to the spindle 133 to move the sleeve 135 to the upper side in the state that the vertical movement of the collet chuck 110 is impossible to collet By chucking 111, the welding position of the capsule is prevented from being displaced due to the movement of the collet chuck 110 during chucking.

In addition, the driving motor 150, which is a rotational force providing means, is mounted in a vertical direction on one upper end of the base plate 103 to transmit the rotational force to the spindle 133 through the timing belt 151 and the belt pulleys 152 and 153. Will be provided. In this way, when the rotational force of the driving motor 150 is provided to the spindle 133, the spindle 133 is a collet chuck 110 and the source capsule (11, 15, 31) (fixed to the collet chuck 110) ( 35 and 51 and the capsule caps 12, 16, 32, 36 and 52 rotate to displace their welds with respect to the welding torch 107.

Meanwhile, as shown in FIGS. 4 and 5, 8, and 9, the cap support unit 190 is mounted on the upper portion of the base plate 103 at a predetermined interval through the fixing bar 200. ), A cam bar 193 installed vertically at the center of the cam housing 191 and rotating at a predetermined angle when vertically moved, and perpendicular to an end of a connecting rod 196 horizontally coupled to an upper end of the cam bar 193. Capsule caps of the source capsules 11, 15, 31, 35, and 51 fixed to the collet chuck 110 while being rotated and elevated with the cam bars 193 around the cam bars 193. 12) 16, 32, 36, and 52 are composed of a push pin 197 for pressing the upper surface downward, and a cam-by-feed cylinder 199 for moving the cam bar 193 up and down. At this time, a guide hole 192 through which the cam bar 193 is inserted in the vertical direction is formed in the center of the cam housing 191, and a guide pin 195 is installed at one side of the guide hole 192, and a cam bar ( On the outer circumference of the 193, a guide groove 194 is formed to be inclined to each other while extending vertically in a line of about 90 ° to each other and coupled to the guide pin 195. In addition, the push pin 197 is provided with a spring 198 to elastically press the capsule cap 12, 16, 32, 36, 52.

Therefore, when the cam bar 193 is raised by the cam by-feed cylinder 199, the cam bar 193 is rotated by 90 ° by the guide groove 194 and the guide pin 195, and the push pin 197 is used. Ascends with the cam bar 193 and revolves around the cam bar 193, and is 90 ° off the centerline of the collet chuck 110. When the cam bar 193 is lowered by the cam by-feed cylinder 199, the cam bar 193 is rotated by 90 ° to the original position by the guide groove 194 and the guide pin 195. 197 is revolved about the cam bar (193) to move on the upper center line of the collet chuck 110 while descending with the cam bar (193), the source capsule (11, 15) fixed to the collet chuck 110 ( 31, 35, 51 of the capsule cap 12, 16, 32, 36, 52, the upper surface is pressed down.

In addition, the welding torch position adjusting unit 170 transfers the welding torch 107 up and down and front and rear directions as shown in FIGS. 4 and 5, and thus, each source capsule 11, 15, 31, 35, and 51. It consists of a vertical transfer unit 171 and a horizontal transfer unit 175 to adjust the welding point according to.

That is, the vertical transfer unit 171 has two vertical guide bars 172 which are vertically installed on the upper surface of the base plate 103, and a vertical transfer body which is vertically movable along the vertical guide bars 172. 173, and the vertical transfer handle 174 for vertically conveying the vertical transfer member 173.

In addition, the horizontal conveying unit 175 is mounted on the vertical conveying body 173 of the vertical conveying unit 171 and two horizontal guide bar 176 extending horizontally with the welding torch 107, and the horizontal guide bar 176 A horizontal conveying body 177 to which the welding torch 107 is integrally mounted through the clamp 179 while being moved horizontally along the c), and the welding torch 107 together with the horizontal conveying body 177 is collet chuck 110. It is composed of a horizontal transfer handle 178 to transfer in a horizontal direction from the center line.

Although not shown, a control panel for controlling the overall operation of the sealed source welding apparatus 101, an air tank and a pneumatic controller for supplying pneumatic pressure to each cylinder, and a welding peripheral device are provided.

Looking at the production process of the sealed source welding apparatus 101 according to a preferred embodiment of the present invention configured as described above various sealed sources are as follows.

First, prior to the operation, the sealed source welding device 101 is installed in the hot cell, and a control panel for operating the same is installed outside the hot cell. Then, the source capsules 11, 15, 31, 35, 51 and the capsule caps of the sealed sources 1, 3, and 5 as shown in FIGS. (12) (16) (32) 36 (52) The welding operation according to the present invention is started with the radiation source and source injection holder (120a) (120c) (120e) disposed in the hot cell.

For example, to weld and seal the inner source capsule 11 of the Co-60 sealed source 1 shown in FIG. 1, first, the collet chuck shown in FIG. 6A for loading the source capsule 11 is loaded. Insert the 110a into the seating hole 134 formed in the sleeve 135 of the collet chuck fixed body 130 using the robot arm, and then cover the collet chuck 110a with the fixing cap 137 to cover the spindle ( 133) is fastened and fixed. Then, using the rotator arm to load the corresponding source capsule 11 into the loading groove 113a of the collet chuck 110a, and then operate the chuck fixing cylinder 139 to raise the sleeve 135. do. At this time, the upper inclined surface 136 of the sleeve 135 contracts the inclined surface 115 of the collet chuck 110 to chuck the collet 111 loaded with the source capsule 11.

In this state, the source injection holder (120a) is to cover the top of the collet chuck (110a) is coupled, the source injection holder (102a) is located on the top of the source capsule (11) the inlet port source capsule (11) Communicate on Then, the radiation source is introduced into the source input holder 102a by a predetermined amount using the robot arm, and the input radiation source is introduced into the source capsule 11.

In this way, when the source input is completed, the source input holder 102a is separated using the robot arm, and then the corresponding capsule cap 12 is covered on the upper part of the source capsule 11 using the robot arm to be combined. . In addition, the cam bar 193 is lowered by operating the cam-by-song cylinder 199 of the cap supporter 190. At this time, the cam bar 193 is lowered by 90 ° by the guide groove 194 and the guide pin 195. And the push pin 197 revolves around the cam bar 193 and moves along the upper centerline of the collet chuck 110 while descending with the cam bar 193 and collet as shown in FIG. 10. The upper surface of the capsule cap 12 of the source capsule 11 fixed to the chuck 110 is pressed and supported downward.

In this state, the driving motor 150 is operated. At this time, the driving motor 150 rotates the spindle 133 through the timing belt 151 and the belt pulleys 152 and 153 to collet chuck 110. The chucked source capsule 11 and the capsule cap 12 are rotated with respect to the position of the welding torch 107 while being rotated. Then, the position of the welding torch 107 through the vertical transfer unit 171 and the horizontal transfer unit 175 of the welding torch position adjusting unit 170 is precisely adjusted to the welding position of the corresponding source capsule (11).

Then, as the welding proceeds, the welding point of the source capsule 11 and the capsule cap 12 welded by the welding torch 107 to which power is applied is at a constant speed by the synchronous rotation with the collet chuck 110. The displacement results in a uniform weld along the circumference.

In this manner, when welding of the source capsule 11 is completed, the driving motor 150 is stopped and the chucking of the collet chuck 110 is released, and the upper support of the push pin 197 is released. The completed source capsule 11 is taken out by the robot arm and stored in the storage bar. The process as described above is repeated until the determined production amount is achieved.

On the other hand, if you want to weld sealing the other source capsules (15, 31, 35, 51) other than the welded source capsules 11 as described above, the collet chuck 110b shown in FIG. In the state of mounting the 110c) (110d) (110e) to the collet chuck fixed body 130 is to proceed with the operation process as described above. However, the external source capsules 15 and 35 into which the internal source capsules 11 and 31 are injected have a relatively large diameter compared to the source capsules 11 and 31 and 51 into which the radiation source is directly injected. The holders 120a, 102c and 102e are not used.

As described above, the present invention is provided by each collet for handling the source capsules of each standard for constituting the various types of sealing source source to seal the production of various types of sealing source source with one welding device It is possible to improve the productivity of the source and to improve the product quality by reducing the production cost of the sealed source.

While the invention has been shown and described with respect to particular embodiments, those skilled in the art will recognize that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the appended claims. Anyone can easily know.

Claims (10)

In the sealed source welding device for welding a capsule cap to be covered in a variety of source capsules with a welding torch, A collet chuck for accommodating and fixing the source capsules in a vertical direction, a collet chuck rotating fixture fixed to the collet chuck and rotatably installed on a vertical line, and providing rotational force to the collet chuck rotating fixture Rotating force providing means for rotating the source capsule with the collet chuck, cap support means for rotatably fixing the capsule cap to be covered in the source capsule fixed to the collet chuck from the top, and the position of the welding torch Sealing source welding device comprising a welding torch position adjusting means for adjusting to the welding point of the source capsule and capsule cap fixed to the. The method of claim 1, The collet chuck is provided with a loading groove for inserting and fixing the source capsule from the top at the center of the upper end of the collet radially divided from the top, the inclined surface is inclined downward toward the middle of the outer circumference is formed, the center at the upper end of the inclined surface Sealing source welding device, characterized in that the locking jaw is cut horizontally toward the side. The method of claim 1, The collet chuck fixed body has a chuck housing mounted at a predetermined interval through a fixing bar on an upper portion of the base plate, a spindle installed to be rotatable about a vertical direction with a bearing at the center of the chuck housing, and It is coupled to the upper and lower movable to form a seating hole for inserting the collet chuck in the vertical direction at the top and the sleeve to contract the collet of the collet chuck toward the center when it is moved upward, and the collet seated in the seating hole of the sleeve Sealing source welding device comprising a fixed cap for fixing the chuck to the spindle, and the chuck fixing cylinder for moving the sleeve up and down. The method according to claim 2 or 3, The fixing cap is formed in a cylindrical shape is screwed on the upper outer periphery of the spindle, the upper end is bent toward the center is a sealing source welding device, characterized in that the engaging piece is coupled to the engaging jaw and the top of the collet chuck is formed in an annular shape. The method according to claim 2 or 3, Sealing source welding device characterized in that the inclined surface corresponding to the inclined surface of the collet chuck is formed in the upper end of the inner circumferential surface of the sleeve to press the inclined surface of the collet chuck toward the center when the sleeve is moved upward. The method according to any one of claims 1 to 3, The rotational force providing means is a sealed source welding apparatus, characterized in that for configuring a drive motor for providing a rotational force to the spindle through the timing belt and belt pulley. The method of claim 1, The welding torch position adjusting means is installed in a vertical direction to form a vertical conveying unit that is vertically moved when rotated, and is mounted on the vertical conveying body to convey the welding torch horizontally from the collet chuck centerline Sealed source welding device comprising a horizontal conveying unit constituting a horizontal conveying body. The method of claim 1, The cap support means is a cam housing mounted at a predetermined interval through a fixing bar on an upper portion of the base plate, a cam bar installed vertically at the center of the cam housing and rotating at a predetermined angle when moved vertically, horizontally on an upper end of the cam bar. Push pins installed perpendicular to the end of the connecting rod coupled to the upper side of the collet chuck when the cam bar is lowered downwards to press the capsule cap upper surface of the source capsule fixed to the collet chuck to the bottom; Sealing source welding device comprising a cam-by-song cylinder for moving the cam bar up and down. The method of claim 8, In the center of the cam housing is formed a guide hole through which the cam bar is inserted in the vertical direction, a guide pin is installed on one side of the guide hole, and is inclined to each other while extending vertically on about 90 ° line on the outer circumference of the cam bar Sealing source welding device characterized in that the guide groove is formed is coupled to the guide pin. The method of claim 1, Sealing source welding device further comprises a source input holder coupled to the top of the collet chuck to guide the radiation source into each source capsule fixed to the collet chuck.