JPH07323381A - Device for producing metallic cylinder - Google Patents

Abstract

PURPOSE:To contrive automation of manufacturing process for metallic cylinders and to improve their productivity. CONSTITUTION:A plurality of a metallic cylinder 11 with a slit are successively supplied by a supply means 51. The slit position of each metallic cylinder 11 supplied is positioned in alignment by a positioning means 58. Each metallic cylinder 11 thus positioned is clamped by plural clamping means 33 and the slits are closed. The plural clamping means 33 are supported by a transporting means 31, and each metallic cylinder 11 clamped by the clamping means 33 is transported in the axial direction. The slit of each metallic cylinder 11 transported is continuously laser-welded by a laser welding means 71. Each metallic cylinder 11 after the welding is removed from the clamping means 33 and carried out by a transporting means 91.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a metal cylinder such as an anode cylinder of a magnetron.

[0002]

2. Description of the Related Art Conventionally, a magnetron anode cylinder 1 used as a metal cylinder in, for example, a microwave oven.
11 (b) to (d) after being formed into a cylindrical shape having a slit (joint) 2 along the axial direction from a plate-shaped metal material by ironing as shown in FIG. 11 (a). After the welding step shown in FIG. 11, the cylindrical shape is formed into a substantially perfect circle as shown in FIG.

That is, in the welding process of the anode cylinder 1, first, in the process shown in FIG. 11 (b), the anode cylinders 1 before welding are incorporated one by one into the holding jig 3, and a total of ten, for example, are incorporated. The slit 2 position of each anode cylinder 1 is positioned on the holding jig 3, and each anode cylinder 1 is clamped to fix each slit 2
Close together.

Next, in the step shown in FIG. 11 (b), the holding jig 3 incorporating the anode cylinder 1 is carried into a laser welding machine and set therein, and the slit 2 of each anode cylinder 1 is welded by this laser welding machine. Then airtightly join.

Next, in the step shown in FIG. 11 (b), after the welding is completed, the holding jig 3 is carried out from the laser welding machine, and the holding jig 3 is unclamped to remove the anode cylinders 1 one by one. .

[0006]

However, in the conventional process of manufacturing the anode cylinder 1, the process of incorporating the anode cylinder 1 into the holding jig 3, the process of positioning the slit 2 position, the process of clamping, and the holding jig 3 are carried out. The process of carrying the set into the laser welding machine, carrying out the holding jig 3 from the laser welding machine and removing the anode cylinder 1 from the holding jig 3, etc. Since the number of anode cylinders 1 that can be manufactured for such a time is small, the productivity of the anode cylinders 1 is poor and there is a problem that they are not suitable for mass production.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an apparatus for manufacturing a metal cylinder capable of improving the productivity of the metal cylinder by automating the manufacturing process of the metal cylinder. And

[0008]

According to a first aspect of the present invention, there is provided a metal cylinder manufacturing apparatus, wherein a plurality of metal cylinders having slits along the axial direction on the circumference thereof are successively supplied, and the supply means. The positioning means for positioning the slit positions of the respective metal cylinders to be supplied on a straight line, a plurality of clamping means for clamping the respective metal cylinders positioned by the positioning means to close the slits, and the plurality of clamps. Conveying means for supporting the means and conveying the respective metal cylinders clamped by the respective clamping means in the axial direction, and slits of the respective metal cylinders conveyed by the conveying means,
Laser welding means for emitting a laser beam to the peripheral surface of each metal cylinder from an oblique angle to continuously weld the metal cylinder, and unloading means for removing each metal cylinder welded by the laser welding means from the clamping means and carrying it out. It is equipped with and.

According to a second aspect of the present invention, there is provided an apparatus for producing a metal cylinder according to the first aspect, wherein the laser welding means surrounds a welding position where the slits of the respective metal cylinders are welded and is conveyed by the conveying means. It is equipped with a shield box that allows each metal cylinder to pass through and the inside is kept in a non-oxidizing gas atmosphere during welding.

An apparatus for manufacturing a metal cylinder according to claim 3 is the apparatus for manufacturing a metal cylinder according to claim 1 or 2, further comprising a side nozzle attached to an emission nozzle for emitting a laser beam of the laser welding means, The nozzle is provided with an annular pipe fitted around the emission nozzle and supplied with a non-oxidizing gas, and a welding position for welding the slits of each metal cylinder by the laser welding means to a plurality of locations around the annular pipe. A nozzle pipe for ejecting a non-oxidizing gas is connected thereto.

[0011]

In the apparatus for manufacturing a metal cylinder according to claim 1, a plurality of metal cylinders are sequentially supplied by the supply means, and the slit positions of the metal cylinders are aligned by the positioning means,
Each metal cylinder is clamped by the clamp means to close the slits, the metal cylinder is conveyed together with the clamp means by the conveying means, the slits of each metal cylinder conveyed by the laser welding means are continuously welded, and the carry-out means is used. Each metal cylinder after welding is detached from the clamp means and carried out, and a series of manufacturing steps of each metal cylinder is automated.

In the apparatus for manufacturing a metal cylinder according to claim 2,
In addition to the operation of the metal cylinder manufacturing apparatus according to the first aspect, the slits of each metal cylinder are welded in a shield box kept in a non-oxidizing gas atmosphere to prevent oxidation of the welded portion of each metal cylinder.

In the apparatus for manufacturing a metal cylinder according to claim 3,
In addition to the function of the apparatus for manufacturing a metal cylinder according to claim 1 or 2, non-oxidizing gas is intensively ejected toward a welding position from a plurality of nozzle tubes of a side nozzle attached to an emission nozzle of a laser welding means. , Prevents oxidation of the welded part of each metal cylinder.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the metal cylinder manufacturing apparatus of the present invention will be described below with reference to FIGS.

FIG. 9 is a perspective view of a magnetron anode cylinder as a metal cylinder before welding, in which the anode cylinder 11 before welding is made of copper.
A copper plate is formed into a cylindrical shape by ironing, and is formed in a state having slits (joints) 12 on the circumference along the axial direction. And the anode cylinder 11 after welding
Is formed into a substantially perfect circular cylindrical shape in which the slit 12 is airtightly joined and welded.

1 and 2 show a front view and a plan view of the manufacturing apparatus, in which the anode cylinder 11 before welding is supplied from the left side, and the anode cylinder 11 after welding is discharged rightward and leftward. The anode cylinder 11 is continuously fed along the conveyance direction A from the right to the right.

In the figure, 21 is a base which is formed in a laterally long direction along the conveying direction A. At the rear of the upper surface of the base 21, columns 22 are erected at both left and right ends and the columns 22 are provided. An arch-shaped frame 24 in which a horizontal frame 23 is installed between the upper ends of 22 is arranged.

An inclined table 25 is arranged on the front side of the base 21, and an inclined surface 26 inclined by about 20 ° with respect to the horizontal direction so as to rise to the right is provided on the upper surface of the inclined table 25. Are formed.

On the tilt table 25, a plurality of slide mechanisms which are slidable in the front-back direction orthogonal to the transport direction A are provided.
A slide base 28 is attached via 27, and a drive unit 29 for slidingly moving the slide base 28 is attached. The drive unit 29 has a structure in which the slide base 28 slides by the feeding action of a screw shaft that is normally and reversely rotated by a motor.

On the slide base 28, three long and narrow carrier bases 30 are arranged in parallel in the front-rear direction along the carrier direction A, and each carrier base 30 is independently moved along the carrier direction A. A transport means 31 is provided to allow the transport means 31 to operate. The conveying means 31 has three guide rails 32 that are long on the slide base 28 along the conveying direction A and are mounted in parallel in the front-rear direction.
Each carrier 30 is slidably attached to each of the guide rails 32, and each carrier 30 is independently slid by a drive mechanism (not shown).

The anode cylinders 11 whose axial directions of a large number of anode cylinders 11 are oriented in the transport direction A and whose slits 12 are positioned in a straight line by the positioning means 58 described later are respectively mounted on the respective transport bases 30. A plurality of clamping means 33 for clamping are arranged in parallel along the transport direction A.

As shown in FIGS. 3 to 6, the clamp means 33 is provided with a clamp body 34 having a substantially L-shaped cross section along an upper surface on one side in a direction orthogonal to the longitudinal direction of the carrier 30. A slit of the anode cylinder 11 on the clamp body 34
A pressing member 35 for pressing one edge side of 12 is attached.

A bearing member 37 in which a bearing portion 36 is erected upright is installed on the upper surface of the center of the carrier table 30 so as to correspond between the clamping positions of the anode cylinders 11. Is bearing. Approximately L is attached to the support shaft 38 between the adjacent bearing portions 36 corresponding to the clamp position of each anode cylinder 11.
An intermediate portion of the V-shaped clamp arm 39 is rotatably supported. A pusher 40 that can come into contact with the other edge side of the slit 12 of the anode cylinder 11 is attached to one arm portion 39a that protrudes above the clamp arm 39. A through hole 41 is formed in the other arm portion 39b of the clamp arm 39 that projects in the horizontal direction, and a thin pin 42 penetrates through the through hole 41 and stands upright on the carrier table 30. A spring 43 is arranged between the table 30 and the arm portion 39b. A drive unit 44 including an electric means such as a solenoid or a means such as an air cylinder is connected to the tip of the arm portion 39b.

In the clamp means 33, the clamp arm 39 is moved against the spring 43 by the operation of the drive portion 44, as shown in FIG.
The state where it is rotated clockwise is the clamp release state,
The anode cylinder 11 can be attached and detached between the pressing member 35 and the pressing element 40. Further, when the driving portion 44 is released, the elasticity of the spring 43 causes the clamp arm 39 to rotate in the counterclockwise direction in FIG. 6 in a clamped state, and the anode cylinder 11 is clamped between the pressing member 35 and the pressing element 40. Then, the slit 12 is brought into close contact.

A supply means 51 for supplying the anode cylinder 11 before welding is arranged above the left side of the base 21. The supply means 51 includes one supply conveyor 52 arranged on the upstream side in the transport direction A and three supply conveyors 53 arranged on the downstream side.

The upstream supply conveyor 52 is fixedly arranged continuously in the pretreatment step of performing oxidation removal after ironing, and the anode cylinder 11 after pretreatment has its axial direction in the transport direction A. It is continuously conveyed in the downstream direction.

Each supply conveyor 53 on the downstream side is a slide base.
The support frame 54 is provided upright on both sides in the front-rear direction of 28 so as to be supported in correspondence with the clamp position of the clamp means 33 on each carrier 30, and moves in the front-rear direction as the slide base 28 slides. , Any one supply conveyor 53 is continuous to the supply conveyor 52, and continuously conveys the anode cylinder 11 received from the supply conveyor 52 in the downstream direction, and a plurality of anode cylinders are provided on the supply conveyor 53.
Bring in 11.

The support frame 54 is provided with a supply mechanism 55 for supplying the anode cylinders 11 conveyed to the most downstream end of each supply conveyor 53 to the positioning means 58 described later one by one. Each of the supply mechanisms 55 has a clamp body 56 that allows the anode cylinder 11 to be attached and detached, and a drive unit 57 that moves the clamp body 56 in the vertical direction and the transport direction A is attached to the support frame 54.

In the supply operation by the supply mechanism 55,
The anode cylinder 11 at the downstream end of the supply conveyor 53 is clamped by the clamp body 56, and the clamp body 56 is moved up, moved in the downstream direction of the transport direction A, and moved downward, thereby positioning the anode cylinder 11. Supply to.

Further, positioning means 58 for positioning the slit 12 of the anode cylinder 11 are provided facing the downstream end of each supply conveyor 53. The respective positioning means 58 rotate the anode cylinders 11 supplied one by one by the supply mechanism 55 in the circumferential direction by the motor 59, and at that time, the slits 12 are formed in the anode cylinders 11.
The position of the slit 12 is detected and the slit 12 is positioned at a predetermined position. The position of the slit 12 is detected by using, for example, a mechanical sensor that detects a detection piece by contacting the peripheral surface of the anode cylinder 11, or a reflection type optical sensor.

Further, on the slide base 28, a downstream side support frame 60 is vertically erected on both sides of the slide base 28 in the front-rear direction on the downstream side of the support frame 54. A mounting mechanism 61 for mounting the anode cylinder 11 positioned by the means 58 to each clamp means 33 of each carrier 30 is provided. This mounting mechanism 61,
It has a clamp body 62 that allows the anode cylinder 11 to be attached and detached, and the clamp body 62 has a fulcrum portion 63 at a take-out position perpendicular to the positioning means 58 and a mounting direction position perpendicular to the clamp means 33.
It is designed to be oscillated and driven through its fulcrum
A cylinder 63 is movably supported along a guide rail 64 attached to the support frame 60 in a direction perpendicular to the clamp means 33, and a fulcrum portion 63 is moved in a vertical direction.
65 is attached to the support frame 60.

In the mounting operation by the mounting mechanism 61,
The anode cylinder 11 positioned by the positioning means 58 is clamped by the clamp body 62 at the take-out position, the clamp body 62 is swung to the mounting direction position via the fulcrum portion 63, and the cylinder 65 is moved.
The anode cylinder 11 is attached to the clamp means 33 by lowering the anode cylinder 11. Thereby each slit
The twelve are exactly aligned.

A laser welding means 71 is provided above the slide table 28 at a substantially middle portion thereof. In this laser welding means 71, a vertical portion 73 is connected to the tip of a horizontal laser light guide portion 72 connected to the upper end of one of the columns 22, and an emission nozzle 74 is attached to the lower end of the vertical portion 73. A cover 75 is attached around the vertical portion 73. Then, the laser beam is emitted from the tip of the emission nozzle 74 toward the welding position B located on the extension line of the supply conveyor 52.

Since the anode cylinder 11 side is inclined with respect to the laser welding means 71, the laser welding means 71
The laser light emitted from the laser beam and reflected on the peripheral surface of the anode cylinder 11 does not return to the laser welding means 71 to make the operation of the laser welding means 71 unstable.

As shown in FIG. 8, the emission nozzle 74 is formed with a tapered nozzle portion 77 from an attachment portion 76 attached to the vertical portion 73. A laser beam is emitted from the tip of the emission nozzle 74, and hydrogen, nitrogen, an argon gas, or a mixed gas thereof is ejected toward the welding position B as a non-oxidizing gas.

A side nozzle 78 is attached to the emission nozzle 74. The side nozzle 78 is provided with an annular pipe 79 fitted around the nozzle portion 77 of the emission nozzle 74 as shown in FIG. 79 is a supply pipe for supplying non-oxidizing gas
80 is connected, and a plurality of nozzle tubes 81 bent in a substantially V shape toward the vicinity of the welding position B are connected.

It should be noted that the emission nozzle 74 is more than the side nozzle 78.
In this case, the ejection flow rate of the non-oxidizing gas is higher and the ejection pressure is set to be higher.

A shield box 82 is provided so as to surround the area around the welding position B including the portion of the emission nozzle 74 of the laser welding means 71.
This shield box 82 is made of acrylic or the like having a high absorption property of laser light, and has a minimum size on both sides in the transport direction A through which the anode cylinder 11 clamped together with the transport base 30 can pass. A passage opening (not shown) having an opening area is formed. A gas supply means (not shown) is connected to the inside of the shield box 82 so that the non-oxidizing gas is constantly filled.

A carry-out means 91 is arranged on the upper right side of the frame 24. This carry-out means 91 is provided in the frame 24.
A rod 93, which is driven to move up and down and rotates, is projected from the lower surface of the drive unit 92 attached to the arm 92, and an arm 94, which is driven to rotate vertically, is attached to the lower end of the rod 93. A hook 95 protruding upward is provided at the tip of the arm 94.

In the carry-out operation by the carry-out means 91,
The arm 94 is arranged at the receiving position parallel to the upper surface of the slide base 28 on the extension line of the supply conveyor 52 and the welding position B, and the arm 94 is advanced inside the anode cylinder 11 transferred by the transfer base 30 and received. , Swing the arm 94 upward from the receiving position to a substantially horizontal position, and
The anode cylinder 11 is handed over to the carry-out conveyor 96 by rotating it horizontally by 80 ° and rocking it to the delivery position below.

The carry-out conveyor 96 is supported by the inclined table 25 so that the right end thereof descends, and a carry-out conveyor 97 for carrying out the anode cylinder 11 to the next process is disposed downstream of the carry-out conveyor 96. There is.

The cover 101 covers the entire manufacturing apparatus.
Is attached.

Next, the operation of this embodiment will be described.

As a pretreatment for welding the anode cylinder 11, the anode cylinder 11 is subjected to oxidation removal treatment. In this treatment, the anode cylinder 11 is dipped in a 1% aqueous solution of potassium hydroxide or sodium at a maximum of 30 seconds for a maximum of 30 seconds, then washed with water and immersed in alcohol for 3 seconds or more.
Remove water drops by air blow.

Then, the anode cylinder 11 that has been subjected to the oxidation removal treatment is continuously conveyed by the supply conveyor 52, and the anode cylinder 11 is delivered to the first supply conveyor 53 continuous to this supply conveyor 52, and this supply conveyor 52 A plurality of anode cylinders 11 are loaded onto 53.

When a predetermined number of, for example, 100 anode cylinders 11 have been loaded onto the supply conveyor 53 which receives the supply of the anode cylinders 11, the slide base 28 is slid forward and backward, and the second supply conveyor 53 is fed. 52
In succession to its supply conveyor 53 on the anode cylinder
Bring in 11.

In parallel with the supply operation of the anode cylinder 11 to the second supply conveyor 53, the first supply conveyor 53
The anode cylinder 11 is positioned and mounted on the clamp means 33 of the carrier 30. That is, the supply mechanism 55 sequentially supplies the anode cylinders 11 conveyed to the downstream end of the supply conveyor 53 to the positioning means 58 one by one. The positioning means 58 rotates the anode cylinder 11 in the circumferential direction to detect the position of the slit 12 and position it. The positioned anode cylinder 11 is mounted on the clamp means 33 of the carrier 30 by the mounting mechanism 61. The mounted anode cylinder 11 is clamped by the clamp means 33 to close the slit 12. After the anode cylinder 11 is clamped to one clamp means 33 of the carrier 30, the carrier 30 is moved to the right, and then the clamp means 33 for clamping the anode cylinder 11 is sequentially moved to the mounting position by the mounting mechanism 61. .
A slight gap is provided between the clamped adjacent anode cylinders 11.

If a predetermined number of anode cylinders 11 are loaded onto the second supply conveyor 53 while the positioning and mounting operation of the first anode cylinder 11 is being performed, the remaining third supply conveyor 53 will have an anode cylinder. 11 is carried in, and the positioning and mounting operation of the anode cylinder 11 is performed from the second supply conveyor 53. Further, when a predetermined number of anode cylinders 11 are loaded onto the third supply conveyor 53, the anode cylinders are fed from this supply conveyor 53.
Perform 11 positioning and mounting operation.

Then, the anode cylinders are attached to all the clamping means 33 of the carrier table 30 which is first positioned and mounted.
After mounting 11, the slide table 28 is moved in the front-rear direction to position the carrier table 30 on the extension line of the welding position B,
The carrier 30 is moved toward the welding position B. At this time,
The anode cylinders 11 are aligned with a gap of about 1 mm between them. And supply conveyor
Anode cylinder by positioning mounting operation to 52
Since the supply conveyor 53 in which 11 is lost or reduced is connected, the anode cylinder 11 is loaded onto the supply conveyor 53 in parallel with the movement of the carrier 30.

When the moving carrier 30 enters the shield box 82 and the slit 12 of the anode cylinder 11 continuously passes the welding position B, a laser beam is emitted from the emission nozzle 74 of the laser welding means 71. Then, the slits 12 of each anode cylinder 11 are sequentially welded. At this time, the non-oxidizing gas is ejected from the plurality of nozzle tubes 81 of the ejection nozzle 74 and the side nozzle 78 toward the welding position B, and welding is performed in the non-oxidizing gas atmosphere. Can be reliably prevented. In addition, by ejecting the non-oxidizing gas from both the ejection nozzle 74 and the side nozzle 78, the non-oxidizing gas in the shield box 82 is replaced and supplied.

After passing through the welding position B, the shield box 82
The inside of the anode cylinder 11 that goes out from the right side goes into the outside of the arm 94 located at the receiving position of the carry-out means 91.

When the welding of all the anode cylinders 11 on the carrier 30 is completed and the carrier 30 moves to the right end of the slide base 28, the movement of the carrier 30 is stopped, and all the clamping means.
Release the clamp of 33.

The arm 94 of the carry-out means 91 is lifted to raise all the anode cylinders 11 to a substantially horizontal position, horizontally rotated 180 ° through the front area, and swung to the delivery position below and onto the carry-out conveyor 96. Hand over. This carry-out conveyor 96
And the unloading conveyor 97 unloads the anode cylinder 11 to the next step.

The carrier table 30 from which the anode cylinder 11 has been taken out by the carry-out means 91 is moved back to the left end of the slide table 28, and the anode cylinder 11 on the supply conveyor 53 is sequentially arranged with respect to the clamp means 33 of the carrier table 30 that has returned. Position and mount.

Furthermore, when the anode cylinders 11 are mounted on all the clamp means 33 of the other carrier 30, the welding operation and the carry-out operation are performed in the same manner as described above.

Therefore, while the single carrier 30 is moved to the right to weld the anode cylinder 11 and discharge the anode cylinder 11 after welding,
The anode cylinder 11 is sequentially positioned and mounted on the clamp means 33 of the other carrier 30, and when the carrier 30 moves to the left and returns to the mounting position, the other carrier 30 is continuously moved to the right. Then, the anode cylinder 11 can be welded and discharged. Therefore, the interval time between the previous welding operation and the next welding operation by the laser welding means 71 can be reduced, and the productivity can be improved.

As described above, the supplying means 51 automatically supplies the anode cylinder 11, the positioning means 58 automatically positions the slits 12 of the anode cylinder 11, and the clamping means 33 automatically clamps the anode cylinder 11 to slit it.
The anode cylinder 11 which is joined with 12 and clamped by the transport means 31 is automatically transported, the slit 12 of the anode cylinder 11 transported by the laser welding means 71 is automatically welded, and the transport means is carried out.
In order to automatically carry out the anode cylinder 11 after welding at 91,
It is possible to improve the productivity of the anode cylinder 11 by automating the manufacturing process of the anode cylinder 11.

Further, before the anode cylinder 11 is welded, an oxidative removal treatment is carried out to fill the shield box 82 with a non-oxidizing gas, and at the same time, the non-oxidizing gas is sprayed onto the welded portion for welding in the non-oxidizing gas atmosphere. Therefore, the oxidation of the anode cylinder 11 can be prevented and the quality can be improved.

Next, FIG. 10 shows another embodiment of the present invention. In this embodiment, the feeding means 51 is arranged parallel to the slide base 28.
The supply conveyors 52 and 53 are arranged, and the positioning means 58 is arranged at the downstream end of each supply conveyor 53.

Then, the anode cylinder 11 at the downstream end on the supply conveyor 53 is sequentially fed to the positioning means 58,
The positioning means 58 positions the slit 12. Then, by sequentially feeding the anode cylinder 11 to the positioning means 58 by the supply conveyor 53, the anode cylinder 11 positioned by the positioning means 58 is sequentially pushed onto the clamp means 33 of the carrier table 30. When the anode cylinders 11 have been sent to all the positions of the clamp means 33 of the carrier table 30, each of the clamp means 33 clamps the anode cylinder 11. The other structures and operations are the same as those in the above embodiment.

In this embodiment, the supply mechanism 55 of the above embodiment is used.
Also, the mounting mechanism 61 is not provided, and the structure can be simplified.

Although the slide base 28 side is inclined in each of the above-mentioned embodiments, the slide base 28 may be arranged horizontally. In this case, the slide base 28 may be arranged in a direction perpendicular to the peripheral surface of the anode cylinder 11. On the other hand, the laser welding means 71 may be arranged so as to be inclined so that a laser beam is emitted from an angle relatively inclined in the axial direction of the anode cylinder 11 to perform welding.

Further, by providing the clamp means continuously in an endless manner, the anode cylinder continuously supplied from the supply means is continuously clamped, and the clamped anode cylinder is continuously welded by the laser welding means. You may make it carry out and carry out the welded anode cylinder continuously with a carrying-out means. In this case, the anode cylinder can be manufactured continuously.

[0064]

According to the metal cylinder manufacturing apparatus of the first aspect, a plurality of metal cylinders are supplied, slit positions of each metal cylinder are positioned, each metal cylinder is clamped, and each metal cylinder is welded to a welding position. It is possible to improve productivity of the metal cylinder by automating a series of manufacturing processes including moving, welding the slits of the metal cylinders, and carrying out the metal cylinders after welding.

According to the apparatus for producing a metal cylinder according to claim 2, in addition to the effect of the apparatus for producing a metal cylinder according to claim 1, the slit of the metal cylinder is provided in a shield box kept in a non-oxidizing gas atmosphere. Can be welded to prevent oxidation of the welded portion of the metal cylinder.

According to the apparatus for producing a metal cylinder according to claim 3, in addition to the effect of the apparatus for producing a metal cylinder according to claim 1 or 2, a plurality of side nozzles attached to the emission nozzle of the laser welding means are provided. Non-oxidizing gas can be intensively ejected from the pipe toward the welding position to prevent oxidation of the welded portion of the metal cylinder.

[Brief description of drawings]

FIG. 1 is a front view of an anode cylinder manufacturing apparatus showing an embodiment of the present invention.

FIG. 2 is a plan view of the manufacturing apparatus according to the above embodiment.

FIG. 3 is a plan view of the clamping means of the above embodiment in a unclamped state.

FIG. 4 is a side view of the clamping means of the above embodiment in a unclamped state.

FIG. 5 is a plan view showing a clamped state of the clamp means according to the embodiment.

FIG. 6 is a side view of the clamp means of the above embodiment in a clamped state.

FIG. 7 is a perspective view of a side nozzle of the above embodiment.

FIG. 8 is a cross-sectional view of an emission nozzle equipped with the side nozzle according to the above embodiment.

FIG. 9 is a perspective view of the anode cylinder of the above embodiment before welding.

FIG. 10 is a front view of a manufacturing apparatus showing another embodiment of the present invention.

FIG. 11 is an explanatory view illustrating a conventional manufacturing process in the order of (a) to (e).

[Explanation of symbols] 11 Anode cylinder as a metal cylinder 12 Slit 31 Conveying means 33 Clamping means 51 Supplying means 58 Positioning means 71 Laser welding means 74 Ejection nozzle 78 Side nozzle 79 Annular tube 81 Nozzle tube 82 Shield box 91 Ejecting means

Claims (3)

[Claims] 1. A supply means for successively supplying a plurality of metal cylinders having slits along the circumference in the axial direction, and the slit positions of the metal cylinders supplied by the supply means are aligned on a straight line. Positioning means, a plurality of clamp means for clamping the metal cylinders positioned by the positioning means to close the slits, and a plurality of metal cylinders supporting the plurality of clamp means and clamped by the clamp means. And a welding means for continuously welding by welding a transporting means for transporting in the axial direction and slits of each of the metal cylinders transported by the transporting means, by emitting a laser beam from an oblique angle to the peripheral surface of each metal cylinder. And a carrying-out means for carrying out the metal cylinders welded by the laser welding means from the clamping means and carrying them out. Manufacturing equipment. 2. A laser welding means surrounds a welding position where a slit of each metal cylinder is welded, and each metal cylinder conveyed by the conveying means is allowed to pass therethrough, and the inside is kept in a non-oxidizing gas atmosphere during welding. The metal cylinder manufacturing apparatus according to claim 1, further comprising a shield box. 3. A side nozzle attached to an emission nozzle for emitting a laser beam of a laser welding means, wherein the side nozzle is an annular pipe fitted around the emission nozzle and supplied with a non-oxidizing gas. With the provision
A nozzle tube for ejecting a non-oxidizing gas toward a welding position where the slits of each metal cylinder are welded by the laser welding means is connected to a plurality of positions around the annular tube, and the nozzle tube is connected to the nozzle tube. Metal cylinder manufacturing equipment.