KR101328549B1 - Chips scatter preventing apparatus for friction stir welding - Google Patents

Abstract

The present invention not only prevents the oxidation of the friction stir welding tool and the joining member during friction stir welding, but also prevents the molten chip from scattering outside the processing area, and also allows the preheating of the joining member having a high melting point. An apparatus for preventing chip scattering for bonding, the apparatus comprising: a shielding means fixedly mounted to a table of a friction stir welding facility, and having an accommodating space therein for accommodating a joining member to be joined; ; And heating means fixedly installed in the accommodation space and fixing and preheating the bonding member accommodated in the accommodation space.

Description

Chip scatter prevention device for friction stir welding {CHIPS SCATTER PREVENTING APPARATUS FOR FRICTION STIR WELDING}

The present invention relates to a friction stir welding, and more particularly, to a friction stir welding apparatus for preventing friction stir welding, which is capable of forming an effective bonding atmosphere while preventing the softened material from being scattered by the friction stir welding tool. It is about.

Lightweight alloys utilizing lightweight materials are widely used in various industrial fields such as transportation equipment such as automobiles, aircrafts and ships, and construction and civil engineering fields. Assembly of various devices and structures using such a lightweight alloy is performed by a bonding process.

Friction Stir Welding (FSW) has been developed and applied as a technique for joining the above-described lightweight alloys.

When the non-consumable rotary tool, which is a hard material, is brought into contact with the abutting surface of the abutting members while rotating at a high speed as compared with the abutting member to be bonded, heat is generated due to mutual friction between the rotating tool and the abutting member, The material of the periphery is softened and the joining members are joined on the principle that the materials on both sides of the joining face are forcibly mixed by the plastic flow of the material by the stirring of the rotary tool. Such friction stir joining does not involve melting of the joining member Therefore, it is possible to prevent welding defects occurring in conventional melting welding, and harmful substances are not discharged during the bonding process, and thus, it is widely used as an environmentally friendly bonding technique.

However, in the above-described friction stir welding process, the softened material, that is, the melt is scattered to the outside of the joint, and the melt scattered to the outside of the joint (hereinafter referred to as "chip") is the friction stir welding facility. There was a problem that caused the failure of the friction stir welding equipment flows into the interior.

In addition, after the friction stir welding is completed, there is an uncomfortable problem that the worker must manually remove the scattered chip.

Related prior arts include Korean Laid-Open Patent Publication No. 2006-11285 (published date: February 03, 2006, titled: "Method of removing cutting residue and safety cover").

The present invention not only prevents the oxidation of the friction stir welding tool and the joining member during friction stir welding, but also prevents the molten chip from scattering outside the processing area, and also allows the preheating of the joining member having a high melting point. It is to provide a bonding chip scattering prevention device.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above.

Chip scattering prevention device for friction stir welding according to the present invention for achieving the above object, is fixedly mounted on the table of the friction stir welding equipment, there is provided an accommodating space for accommodating the bonding member to be bonded therein chip during friction stir welding operation Shielding means having a casing to prevent the scattering of; And heating means fixedly installed in the accommodation space and fixing and preheating the bonding member accommodated in the accommodation space.

The shielding means may further include a cover covering the upper portion of the casing.

Specifically, the side wall and the cover of the casing may be made of a transparent material to visually check the bonding state during friction stir welding.

More specifically, a gas supply line capable of supplying argon gas into the accommodating space part may be connected to one side of the side wall of the casing.

And a chip recovery hole is provided on the side wall of the casing, the chip recovery hole can be opened and closed by the swing door.

In the center of the cover may be formed through-holes for guiding the main spindle equipped with the friction stir welding tool into the receiving space during the friction stir welding operation, as well as the main head rotatably supporting the main shaft.

And the heating means, the heating plate fixedly mounted on the bottom surface of the receiving space portion for preheating the bonding member; And a plurality of fixing brackets for fixing the bonding member mounted on the heating plate.

The fixing brackets are attached to the upper part of the joining member so as not to interfere with the joining portions of the joining members, and the fastening brackets covering the upper part to the joining members may be coupled to the heating plate while pressing and fixing the joining members by tightening screws.

As described above, the apparatus for preventing friction stir welding according to the present invention includes shielding means for limiting a joining member to be bonded therein, thereby preventing the molten chip from scattering out of the processing region during friction stir welding. It can be prevented, there is an advantage that the recovery of the chip is easy.

In addition, by injecting argon (Ar) gas into the shielding means, the present invention can not only perform friction stir welding under a stable and efficient bonding atmosphere, but also prevent the oxidation of the friction stir welding tool and the joining member during friction stir welding. There is an advantage to that.

In addition, by further providing a heating means for preheating the bonding member inside the shielding means, there is an advantage that can maximize the bonding efficiency of the platinum or titanium material having a high melting point.

1 is a perspective view schematically showing a state in which a chip scattering prevention device according to the present invention is mounted on a friction stir welding facility,
FIG. 2 is an exploded perspective view showing the chip shatterproof device shown in FIG.
3 is a view showing a state in which the bonding member is fixed to the heating means shown in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference symbols whenever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 schematically shows a state in which the chip scattering prevention device according to the present invention is mounted in a friction stir welding facility, the chip scattering prevention device 100 for friction stir welding according to the present invention is a bonding member to be bonded to the inside ( P1, P2 (see FIG. 3), the shielding means 110 is accommodated, and the heating means fixedly mounted in the shielding means 110, fixing and preheating the bonding members (P1, P2) accommodated in the shielding means 110 130.

Thus, the chip scattering prevention device 100 of the present invention including the shielding means 110 and the heating means 130, as shown in Figure 1, the table T of the conventional friction stir welding equipment (not shown) It is fixedly mounted on.

First, the shielding means 110 includes a casing 112 in which the bonding members P1 and P2 to be bonded are accommodated, and a cover 122 covering the upper portion of the casing 112.

The casing 112 has a housing shape in which an accommodation space 114 is provided and an upper portion thereof is opened. In the receiving space 114, the bonding members P1 and P2 to be bonded are accommodated, and the heating means 130 described later is fixedly mounted. And the lower part of the casing 112 is fixedly mounted to the table T of a normal friction stir welding facility (not shown) by the fixing bolt B.

And the side wall of the casing 112 is made of a transparent material that can see through the inside to visually check the bonding state during friction stir welding operation. One side wall of the casing 112 is connected to a gas supply line 116 capable of supplying argon (Ar) gas into the accommodation space 114. The argon (Ar) gas supplied to the accommodation space 114 through the gas supply line 116 blocks the friction stir welding tool 10 and the joining members P1 and P2 from contacting oxygen during friction stir welding. Prevents oxidation

In addition, a chip recovery hole 118 is provided on the sidewall of the casing 112. The chip recovery hole 118 is for recovering the chip in the receiving space 114 when the friction stir work is completed. The chip recovery hole 118 is a vacuum such as a conventional vacuum cleaner that can suck the chip into the vacuum. Suction means (not shown) are inserted. And the chip recovery hole 118 is closed by the swinging door 120 during friction stir welding, one end of the swinging door 120 is connected to the side wall of the casing 112 and the ordinary hinge (H).

1 and 2, although the casing 112 of the rectangular box shape is shown, it will be appreciated by anyone that the shape of the casing 112 is not limited to the rectangular box shape.

On the other hand, the cover 122 has a horizontal flat plate shape. The cover 122 is made of a transparent material that can see through the inside of the casing 112 so as to visually check the bonding state during the friction stir welding operation. The through hole 124 is formed in the center of the cover 122. The through hole 124 is fitted with a spindle head 14 for rotatably supporting the spindle 12 on which the ordinary friction stir welding tool 10 is mounted. That is, during the friction stir welding operation, the friction stir welding tool 10 and the main shaft 12 are guided into the receiving space 114 through the through hole 124 to be in close contact with the joint portions of the joining members P1 and P2. The spindle head 14 is fitted into the through hole 124. As will be appreciated by anyone, anyone will know that the spindle head 14 is moved up and down and left and right by the conveying means (not shown) of the friction stir welding facility.

The cover 122 formed as described above is slid in the upper part of the casing 112 by the operation of the spindle head 14 fitted in the through hole 124 during the friction stir welding operation. That is, during the friction stir welding operation, the spindle head 14 guides the friction stir welding tool 10 along the joint portion, whereby the cover 122 is guided along the spindle head 14.

In addition, the cover 122 is always manufactured to have a size to cover the upper portion of the casing 112 even when guided along the spindle head 14 during the friction stir welding operation. The heating means 130 is disposed in the accommodation space 114 of the shielding means 110 formed as described above.

The heating means 130 includes a heating plate 132, and a plurality of fixing brackets 134 for fixing the bonding members (P1, P2) mounted on the heating plate 132.

The heating plate 132 has a flat plate shape as shown, and is fixedly mounted on the bottom surface of the accommodation space 114. The heating plate 132 may be electrically connected to a controller (not shown) disposed outside the accommodation space 114 to control the temperature.

On the other hand, the fixing bracket 134 serves to support the bonding members (P1, P2) so that the bonding members (P1, P2) does not shake during friction stir welding. The fixing brackets 134 are spread over the upper portions of the bonding members P1 and P2 so as not to interfere with the bonding portions of the bonding members P1 and P2. Thus, the fixing brackets 134 span the upper portions of the bonding members P1 and P2. They are coupled to the heating plate 132 while pressing and fixing the bonding members P1 and P2 by the tightening screw 136.

Hereinafter, the state of use of the chip scattering prevention device 100 formed as described above will be briefly described.

First, after loosening the fastening screw 136 of the heating means 130 to separate the fixing bracket 134 from the heating plate 132, the joining members (P1, P2) to be bonded to the receiving space of the casing 112 (114) is inserted into the top of the heating plate 132. Then, the fixing members 134 and the fastening screw 136 are used to fix the bonding members P1 and P2 to the heating plate 132.

When the bonding members P1 and P2 are fixed to the heating plate 132, the cover 122 is covered on the casing 112, and then the heating plate 132 is operated to form a stable and efficient bonding atmosphere. The bonding members P1 and P2 are heated, and argon (Ar) gas is supplied into the accommodation space 114.

As described above, when the cover 122 is covered on the upper part of the casing 112 and the bonding atmosphere is formed in the accommodation space 114, the friction stir welding tool 10 contacts the joint portions of the joining members P1 and P2. The spindle head 14 is lowered to the inside of the accommodation space 114 as much as possible. At this time, the rotating friction stir welding tool 10 and the main shaft 12 are guided into the receiving space 114 through the through hole 124 formed in the cover 122, and the main shaft head 14 is the through hole 124. ). In this state, when the spindle head 14 is moved along the joint, friction heat is generated at the joint by the friction stir welding tool 10, whereby the material at the joint is melted and agitated, and the stirred melt is rubbed. After the stirring joining tool 10 is filled in the groove formed through it, it is cooled and solidified by an immediate loss of frictional heat. As the stirred melt is solidified, the bonding members P1 and P2 are bonded to each other.

Meanwhile, molten chips scattered to the outside of the friction stir welding tool 10 during the friction stir welding operation remain inside the accommodating space 114 by the casing 112 and the cover 122. Chip remaining in the space 114 is recovered by the vacuum suction means (not shown) inserted through the chip recovery hole 118 after the friction stir welding operation is completed.

And since the cover 122, which is moved with the spindle head 14, always covers the upper portion of the casing 112, argon (Ar) gas is not leaked to the outside during the friction stir welding operation.

The chip scattering prevention device 100 for friction stir welding formed as described above includes shielding means 110 defining the joining members P1 and P2 to be bonded therein, such that the molten chip is scattered during friction stir welding. Can be prevented and the recovery of chips is facilitated.

In addition, the present invention, by injecting the argon (Ar) gas into the shielding means 110, not only can carry out the friction stir welding under a stable and efficient bonding atmosphere, but also the friction stir welding tool 10 and the joining member during friction stir welding. The oxidation of (P1, P2) can be prevented.

In addition, by further providing a heating means 130 for preheating the bonding members (P1, P2) in the shielding means 110, it is possible to maximize the bonding efficiency of the platinum or titanium material having a high melting point.

The chip scattering prevention device 100 for friction stir welding as described above is not limited to the configuration and operation of the embodiments described above. The above embodiments may be configured such that various modifications may be made by selectively combining all or part of the embodiments.

100: chip scattering prevention device 110: shielding means
112: casing 114: accommodation space
116: gas supply line 118: chip recovery hole
122: cover 124: through hole
130: heating means 132: heating plate

Claims (8)

A shielding means fixedly mounted to a table of the friction stir welding facility, and having an accommodating space for accommodating a joining member to be joined therein, the shielding means having a casing to prevent chip scattering during the friction stir welding operation; And
And a heating means fixedly mounted in the accommodation space and fixing and preheating the bonding member accommodated in the accommodation space.
The heating means,
A heating plate fixedly mounted to a bottom surface of the accommodation space and preheating the bonding member; And
It includes; a plurality of fixing brackets for fixing the bonding member mounted on the heating plate,
The fixing brackets are attached to the upper portion of the joining member so as not to interfere with the joining portions of the joining members, and the fastening brackets spread over the joining members are frictionally coupled to the heating plate while pressing and fixing the joining members by tightening screws. Chip scattering prevention device for stir welding.
The method according to claim 1,
The shielding means,
Cover for covering the upper portion of the casing; Friction stir welding device further comprising a scattering prevention device.
The method according to claim 2,
The side wall and the cover of the casing friction scattering bonding chip scattering prevention device is made of a transparent material so as to visually check the bonding state during the friction stir welding operation.
The method according to claim 1,
Friction stir welding device for friction stir welding is connected to one side of the casing side gas supply line for supplying argon gas into the receiving space.
The method according to claim 1,
The side wall of the casing is provided with a chip recovery hole,
The chip recovery hole is a chip scattering prevention device for friction stir welding is opened and closed by the swing door.
The method according to claim 2,
Chips for friction stir welding having a through hole into which a main shaft, in which a friction stir welding tool is mounted, is guided into the accommodation space and a main shaft head rotatably supporting the main shaft is inserted in the center of the cover. Shatterproof device.
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