JPS5850191A - Shield gas sealing device for high energy density working device - Google Patents

Abstract

PURPOSE:To perform high energy density working satisfactorily, by providing a seal cover around the part to be worked to partition a sealed space, and providing a port that introduces shielding gas on the side wall of the seal cover and thereby sealing the part to be worked surely. CONSTITUTION:A sealed space 8 is partitioned by placing a cap-shaped seal cover 9 having an open rim 7 around the part to be remelted 5 of a member to be remelted 4. A shielding gas introducing port 11 is provided on the side wall 10 of the seal cover 9, and shielding gas regulated in flow rate and pressure is sent into the sealed space 8, and discharged from a discharge port 15. A high energy remelting device such as laser etc. is operated and a laser beam etc. is irradiated onto the part to be remelted 5 through a transmitting window 17. By this gas sealing device 6, the part to be remelted 5 is remelted being in the completely cut off state from oxygen in the atmosphere.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high energy density processing device, and more particularly to a shield gas seal device thereof.

Conventional energy-dense processing equipment, such as laser remelting equipment or TIG remelting equipment, generally includes a high energy density source such as a laser beam or TIG arc that processes the workpiece. The seal cover is sprayed and supplied from the tip of the laser nozzle or TIG torch toward the workpiece. Accordingly, according to such a shield gas injection type high energy density processing apparatus, the processed portion of the workpiece is shielded from the atmosphere by the shield gas, so that 7. The workpiece can be processed without being adversely affected by #l cables in the atmosphere.

However, when machining a workpiece containing a large amount of graphite or carbon, such as cast iron, with such a conventional high-energy density machining device using a shield gas injection method, the shield gas may become turbulent due to disturbances in the flow of the shield gas. slightly (io
Even if oxygen (more than oopps) is mixed in from the atmosphere, that oxygen reacts with graphite and carbon activated by a high energy density source, resulting in CO! Gas and CO gas are generated, and these gases remain as plowholes in the solidified structure of the workpiece, which can significantly reduce the wear resistance of the remelted part of the workpiece and cause damage to the welded part. Mechanical properties may deteriorate significantly. Especially when using high energy density machining with 1 shield gas injection method @stomach outside the cabinet, etc.
When the gas sealing property of the shielding gas is inhibited by the influence of wind or the like, oxygen in the atmosphere reaches the processed portion of the workpiece, which causes the above-mentioned problems and causes stagnation.

The present invention addresses the above-mentioned problems in the high energy density machining section of the conventional shield gas injection method, and makes it possible to satisfactorily process workpieces using energy density machining @stomach without causing such problems. The purpose of the present invention is to provide a shield gas seal device for high energy density processing equipment that enables the following.

According to the present invention, this object has 10 JIs that can come into contact with the workpiece around the workpiece, and cooperates with the workpiece to create a substantially sealed air space. - A high-energy dense 1E processing characterized by having a seal cover capable of defining - and a shield gas introduction port provided on the seal cover for introducing shield gas into the sealed cabinet. Coupled with equipment shield gas seal equipment.

According to the shielding gas sealing device for high energy density processing equipment according to the present invention, the processed portion of the workpiece is reliably covered with the shielding gas, thereby effectively blocking it from oxygen in the atmosphere. The generation of plowholes can be effectively prevented, and a good processed part can be obtained.

Furthermore, according to the shielding gas seal device for high energy density processing equipment according to the present invention, the shielding gas is not affected by wind, etc., so the energy density processing equipment can also be used outside. Furthermore, since the shielding gas is effectively utilized, the usage of the shielding gas can be greatly reduced compared to the conventional method.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in detail with reference to some preferred embodiments thereof, with reference to the accompanying drawings.

No. 111 is a shield gas seal for laser remelting equipment'@
High energy density processing according to the present invention configured as a stomach @
It is an illustrative IIW/14 side view showing the first example of the shield gas seal for 1.

The figure shows the laser nozzle of the Ichisaka laser remelting device, in which a laser beam 2 generated by a laser beam generator (not shown in the figure) is focused by a condensing lens 3, and the laser beam The remelted part @ 4 of the remelted part 5
It is now possible to irradiate the area.

The shield gas sealing device 6 according to the first embodiment illustrated for such a laser remelting device has an opening edge 7 that abuts against the remelted portion @4 around the remelted portion 5. It has a seal cover 9 which can cooperate with the member 4 to be remelted to define a substantially sealed air conditioner 8.

This seal cover 9 has a cap shape, and a shield gas introduction port 11 for introducing shield gas into the sealed air conditioner 8 is provided on its side W10. A conduit 13 having cooling fins 12 is integrally connected to this shielding gas introduction port 11 . 111!113
One end of a flexible tube 14 is connected to the other end. The other end of the flexible tube 14 is connected to a shield gas pump (not shown), and the flow rate and pressure are adjusted by a flow control valve and a pressure valve (also not shown), and the shield Gas is introduced into the closed air conditioner 8 as indicated by arrows in the figure.

In the case of this embodiment, a shield gas exhaust port 15 is provided on the side of the side wall 10 of the seal cover 9 facing the shield gas introduction port 11 for discharging the shield gas introduced into the sealing chamber 8. It is being Further, the upper wall 16 of the shield cover 9 is provided with a laser beam transmitting hole 117 that allows the laser beam 2 to pass therethrough but does not allow the shielding gas to seep out. In this case, the laser beam transmission 1117 is preferably made of a material that hardly attenuates the laser beam 2, such as potassium chloride crystal, zinc selenium, or uranium nitride.

In operation, τ introduces shielding gas into the sealed space 8 from the shielding gas introduction port 11 prior to remelting the part to be remelted in the laser remelting gastric cavity.
Scavenge the air that was present in 8 with shielding gas. After the air in the sealed space 8 has been completely eliminated, the shielding gas is sealed at a predetermined flow rate and a predetermined pressure.
The laser remelting device is operated while the part 5 of the member 4 to be remelted is completely shielded from oxygen in the atmosphere. Perform remelting. In this case, in synchronization with the movement of the laser nozzle, the shielding gas sealing scissors w6 are moved along the remelted member while the opening m7 thereof is in contact with the remelted member 4. As a result, predetermined portions of the member to be remelted are remelted.

Figure 2 shows a second shielding gas sealing device for a high energy density processing device according to the present invention, which is configured as a shielding gas sealing device for a laser remelting device for remelting a 111m circular object 11. FIG. 2 is an 11-plane decomposition view similar to FIG. 1 showing an embodiment of the present invention.

Note that in FIG. 2, parts that are substantially the same as those shown in FIG.

The shielding gas sealing device according to this embodiment is suitable for remelting a columnar or cylindrical member to be remelted, and the shielding gas sealing device 6 is installed in the circumferential or longitudinal direction of the remelting member 4. be moved along.

Figure 3 shows high-energy density processing according to the present invention configured as a modified example of the first embodiment @shield gas seal for housing@
11 similar to FIG. 1 showing a third embodiment of the stirrup.
iiiIll. In FIG. 3, members that are substantially the same as those shown in FIG. 1 are designated by the same reference numerals as those shown in FIG.

In this embodiment, the shielding gas supplied via the flexible tube 14 and the winding tube 13 is further guided! 18
Afterwards, the shield gas is directed into the shield gas injection nozzle 19. The nozzle 19 has a substantially cylindrical shape surrounding the laser beam 2 emitted from the laser nozzle 1, and is above the shield gas seal @116! 16. The lower end of this shielding gas nozzle 19 has a conical shape, thereby directing the shielding gas supplied into the cough shielding gas nozzle to the part to be remelted of the member to be remelted 4. It is designed so that it can be injected at a speed of ^ towards the target.

In addition, in this embodiment, the shield gas seal shell 1f6
The opening edge 7 of the opening edge 7 is able to come into contact with the re-melted member 4 all around the re-melted member, so that the shield gas is injected and supplied into the closed space 8 by the shield gas injection nozzle 19. The shielding gas is released into the atmosphere from the slight difference between the remelted part @4 and the edge part 7, as indicated by the arrow in the figure.

FIG. 4 is a longitudinal cross-section similar to FIG. 3, showing a fourth embodiment of the shield gas seal @ stirrup for high energy density machining equipment according to the present invention configured as a TIGMIIm@shield gas seal device for animals. It is a diagram. In FIG. 4, members that are substantially the same as those shown in FIG. 3 are designated by the same reference numerals as those shown in FIG.

In this embodiment, the upper W of the shield gas seal device 6 is
16 is provided with a sleeve portion 20, and the shield gas seal @lI6 is fastened and fixed by the sleeve portion 20 to the TIG torch 21 of the JUG remelting stirrup by a fastening means such as a screw 22. Follow me.
The shield gas seal device according to this embodiment is automatically moved by the TIG torch as the ■■G torch 21 is moved.
The arc 24 formed between the electrode 23 of the G torch 21 and the workpiece 4 can be effectively shielded.

In addition, the high energy density r! according to the present invention! The shield gas used in R processing @ cost shield gas seal l1w is:
The gas may be an inert gas such as argon, helium, or nitrogen, and may also be carbon dioxide (added with carbon dioxide) or carbon dioxide itself.

Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited to these embodiments, and various embodiments are possible within the scope of the present invention. will be clear to those skilled in the art.

For example, the shield gas seal device for energy density processing equipment according to the present invention can be used for laser remelting equipment and TIGFI.
Shield gas seal for ImM installation Shield gas seal for processing equipment such as welding equipment and cutting equipment that uses high energy density sources such as laser beams and TIG arcs as processing means, not limited to wheel loads. It is also possible to configure it as a wheel load, and furthermore, it is also possible to configure it as a shield gas sealing device for MIGll@place or carbon dioxide spark welding I1IW1.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the declination II showing the first embodiment of the shield gas seal device for high energy density machining equipment according to the present invention, and Fig. 2 is the shield gas seal for high energy density machining equipment according to the present invention @ FIG. 113 is a decompressed longitudinal cross-sectional view similar to FIG. 1 showing the second embodiment of the stirrup, and FIG. FIG. 4 is a longitudinal cross-sectional view similar to FIG. 1, and FIG. 4 is a similar solution to FIG. It is a vertical vertical l1iIi diagram. 1: Laser nozzle, 2... Laser beam, 3...
- Condensing lens, 4... Member to be remelted, 5-... Part to be remelted. 6... Shield gas seal @ beast, 7... Opening green part,
8... Sealed air conditioner, 9... Seal cover, 10...
Side wall, 11... Shield gas introduction boat, 12...
cooling fins. 13--Conduit, 14--Flexible tube,
15... Shield gas exhaust port, 16-... Upper wall,
17... Laser beam transmission pipe, 18... Conduit, 19
...Shield gas injection nozzle, 20...Sleeve part, 21...T■G torch, 22...Screw, 23...
・Electrode, 24...Arc □ Patent applicant: Toyota Automatic Kushi Industries Co., Ltd. Agent: Attorney Akira ? li/IA acid 1st
Figure 2 Figure 3 - Figure 4

Claims (1)

[Claims] A seal that has an open green part that can come into contact with the workpiece S@ around the workpiece part, and that can cooperate with the workpiece to define a substantially sealed seal. A shield gas for Hatake energy density processing equipment, which is characterized by having a cover and a shield gas introduction port provided on the seal cover for introducing the shield gas into the sealed chamber. sealing device.