KR101451278B1 - Apparatus for friction stir welding - Google Patents

Abstract

A friction stir welding apparatus capable of performing both of a basic friction stir welding operation and a machining operation capable of rotating a tool such as a groove machining and a finishing machining operation in a single apparatus. A friction stir welding composite apparatus according to the present invention includes a bed for fixing a workpiece, a longitudinal member installed around the bed and performing three-dimensional movement for machining and joining the workpiece, a transverse member, a vertical member, A tool attached to the header and rotating at a high speed, and a control unit. At the rear of the bed, there is provided a tool seating table in which a plurality of tools are stored for grooving, finishing, or friction stir joining so as to selectively load and unload the headers by a control unit. An air nozzle and a cutting oil nozzle are formed so as to selectively eject air or cutting oil.

Description

[0001] APPARATUS FOR FRICTION STIR WELDING [0002]

The present invention relates to a friction stir welding apparatus, and more particularly, to a friction stir welding apparatus and a friction stir welding apparatus capable of performing a pre-treatment work and a post-treatment work of a material for friction stir welding, ≪ / RTI >

2. Description of the Related Art [0002] In recent years, lightweight structures have been increasing in various industrial fields, and application of lightweight members has been rapidly expanding, particularly in the field of transportation machinery (rail cars, automobiles, ships, airplanes, etc.).

It is difficult to obtain satisfactory welded joints due to the deformation and residual stress caused by welding heat, weld cracks such as solidification cracks, pores and oxidation, as well as the strength of the welded joints, when constructing high strength / lightweight welded structures using existing fusion welding.

The environment-friendly new welding technique that can solve these problems drastically, that is, the application of the friction stir welding (friction stir welding) using heating by friction and plastic flow, the thermal deformation and the residual stress due to welding are extremely small It is possible to obtain a high-quality welded portion without occurrence of fumes and harmful rays, which is effective in terms of welding quality and economy.

Alloys are being studied not only in the area of lightweight alloys of dissimilar materials but also in the areas of lightweight alloys and steel materials joining in conventional lightweight alloys of aluminum and aluminum.

Among the products produced by such a friction stir welding technique, a mask water cooling plate used in a sputtering apparatus will be described as an example. The mask water-cooled plate is composed of four frames in a rectangular frame shape, and a flow passage for circulating cooling water is formed inside the frame.

In the method of manufacturing the mask water-cooled plate by using the friction stir welding apparatus, four frames 53 are arranged in a rectangular shape as shown in FIG. 1, and then the welding portions 54 are welded by friction stir welding A groove 55 is formed on the upper surface of the frame 53 along the central portion to form a seating portion 55 in the second stage and then grooves are formed along the center of the seating portion 55 to form a passage 56 The cover plate 57 is placed on the seat part 55 and then the outer periphery thereof is welded by friction stir welding in step 4 and finally finishing the surface in step 5 .

As shown in the above work procedure, in order to produce a single water-cooled plate, even when cutting the frame, the frame is welded to the machining center by a friction stir welding device, It is inconvenient to carry out welding while moving to the agitating and bonding apparatus, and then moving to a machining center for finishing work by finishing.

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above-mentioned problems, and it is an object of the present invention to provide a friction stir welding apparatus and a friction stir welding method capable of performing both of a basic friction stir welding operation and a machining operation capable of rotating a tool such as groove machining and finishing machining A friction stir welding method and a friction stir welding method.

Furthermore, the present invention is to provide a friction stir welding apparatus in which various tools can be continuously and continuously connected automatically by automatically changing the tools to be replaced for each machining operation.

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

In order to solve the above problems,

A horizontal member, a vertical member, an ascending / descending member, and a header, which are mounted on the periphery of the bed and move in three dimensions to process and join the workpiece; And a control unit,

In the rear of the bed, there is provided a tool seating table in which a plurality of tools are stored for grooving, finishing or friction stir joining so as to selectively load and unload the headers by a control unit. And an air nozzle and a cutting oil nozzle are formed to jet the air or the cutting oil to the friction stir welding joint device.

Specifically, on both sides of the bed, a chip discharge conveyor can be installed so as to discharge the discharged chips to the rear side or the front side of the bed.

The transverse member is guided along the X-axis transferring rail formed on the upper surface of the longitudinal member, the X-axis transferring yoke is formed along the longitudinal direction at the center of the upper surface of the longitudinal member, and the X- , And an X-axis pinion coupled with the X-axis transfer lever is preferably connected to the X-axis transfer motor.

Alternatively, the plurality of tool seats may be constructed of jaws that are twisted together to allow the tools to be inserted, and a compression spring is inserted behind the jaws of the jaws to allow the jaws to flex or squeeze.

A plurality of tool seatings are arranged at equal intervals around the rotary, and a rotary motor for rotating the rotary in a desired direction and angle by a control unit can be installed at the lower portion of the rotary.

Further, the rotary may be horizontally reciprocated by the LM guide and the reciprocating cylinder.

As described above, when the material is placed on the bed, the friction stir welding composite apparatus according to the present invention has the advantage of being able to continuously perform joining, grooving, finishing, and the like while changing the tool itself to produce an article .

1 is a view showing an example of a production method of a mask water-cooled plate,
2 is a perspective view showing a friction stir welding composite apparatus according to the present invention,
3 is a plan view of a friction stir welding composite apparatus according to the present invention,
4 is a front view showing a friction stir welding composite apparatus according to the present invention,
5 is a side view showing a friction stir welding composite apparatus according to the present invention,
6 is a plan view showing a longitudinal member for X-axis movement of the friction stir welding composite apparatus,
Fig. 7 is an enlarged view of a portion A of Fig. 4 for explaining the feeding device for X-axis movement,
8 is a front view showing the lateral member for Y-axis movement in detail,
FIG. 9 is a side view of the lateral member of FIG. 8,
FIG. 10 is a view showing in detail the engagement relationship of the tool rests shown in FIG. 3,
Fig. 11 is a side view of the tool rest of Fig. 10, and Fig.
12 is a view showing the movement of the tool rest.

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.

Referring to FIGS. 2 to 5, which are a perspective view of FIG. 2 and a plan view, a front view, and a side view, respectively, of the composite friction stir welding apparatus 100 according to the present invention, A vertical member 120, a horizontal member 130, a vertical member 140, and a vertical member 140 which are installed on both sides of the bed 110 and on the upper and lower sides of the bed 110, A descending member 150 and a header 160. [

Referring to FIG. 6, the bed 110 has a sufficiently large area, and a plurality of grooves are formed on the upper surface to fix the workpiece after it is mounted, and these grooves are formed as a "T" groove. On both sides of the bed 110, a longitudinal member 120, which is a support member for moving in the X-axis direction (forward and backward direction), is provided.

At this time, the longitudinal member 120 is installed at a distance from the bed 110, and a chip discharge conveyor 180 is installed between the bed 110 and the longitudinal member 120. The chip discharge conveyor 180 is installed to rotate the spiral screw shaft. The chip discharge conveyor 180 serves to discharge the chips generated in the bed 110 to the rear while rotating the chip discharge conveyor 180, which is a screw shaft, .

The longitudinal members 120 serve as guides and supports for moving the transverse members 130. X-axis transport rails 121 are formed on both sides of the upper surface of each of the longitudinal members 120, and the X- 121 are formed between the X-axis transporting lakes 122 and the X-axis transporting lakes 122. The X-axis conveying rack 122 has a long bar shape like a rail, and a gear is formed on one side.

7, the upper part of the longitudinal member 120 is provided with an X-axis feed rail 121 along the X-axis feed rail 121, as shown in FIG. The X-axis transfer guide 125 is coupled to a moving X-axis transfer guide 125. The X-axis transfer guide 125 is formed on both lower ends of the transverse member 130 or on the lower surface of the X-axis transfer plate 126, The transfer plate 126 is engaged on both lower ends of the lateral member 130. An X-axis feed motor 170 for moving the lateral member 130 is installed in the upper side of the plate 126 or in the lateral member. The X-axis feed motor 170 is rotated and rotated, Axis transferring pin 122 is coupled with the x-axis transferring pin 122 to be engaged with the x-axis transferring pin 122. Accordingly, when the X-axis feed motor 127 is rotated, the X-axis feed pinion 128 is rotated, and the X-axis feed pin 122 is engaged with the X- And reciprocates back and forth along the feed rail 121.

8 and 9, Y-axis feed rails 131a and 131b are formed along the longitudinal direction at the front side of the upper surface side and the lower side of the front side, and the transverse member 130 A Y-axis ball screw 138 is installed along the longitudinal direction of the front side center portion of the Y-axis ball screw 130 and a Y-axis motor 137 for rotating the Y-axis ball screw 138 at one end of the Y- Respectively. The Y-axis transfer plate 136 is mounted on the Y-axis ball screw 138 so as to reciprocate right and left according to the rotation of the ball screw, and the Y-axis transfer plate 136 is coupled to the vertical member 140.

Y-axis conveying guides 145a and 145b are formed on the back side of the vertical member 140 so as to correspond to the Y-axis conveying rails 131a and 131b to rotate the Y-axis conveying motor 137 and the Y- The vertical member 140 reciprocates leftward or rightward along the longitudinal direction of the transverse member 130. As shown in FIG.

2 to 5, an elevating member 150 is coupled to the front of the vertical member 140. The elevating and descending member 150 is moved upward and downward by the rotation of the Z- And a reciprocating motion is performed. For this movement, the Z-axis feed motor 147 is connected so that the ball screw extends downward, and the back surface of the lifting member 150 is screwed to the ball screw. Rails and guides corresponding to each other are vertically formed on the front surface of the vertical member 140 and the rear surface of the elevating and lowering member 150 to guide the upward and downward movement of the elevating and lowering member 150. The movement of the lifting and lowering member 150 is merely an operation of the ball screw and the LM guide, so that the detailed description will be omitted by drawing the reference numerals.

Next, a header 160 is coupled to the front side of the lifting member 150. The header 160 has a tool chuck 161 for clamping various tools under the tool chuck 161 and a rotary motor for rotating the tool chuck 161 at a high speed. Therefore, the tool chuck 161 is rotated at a high speed in a state in which the tool for friction stir welding, the tool for grooving and the tool for finishing are selectively mounted, and the workpiece is moved in the X-, Y- and Z- .

Since the friction stir welding composite apparatus formed as described above must continuously perform various operations continuously, it is necessary to automatically change the tool instead of manually. According to this need, the friction stir welding composite apparatus 100 according to the present invention is further configured to include a tool seating table 170 in which various tools are stored and loaded and unloaded.

As shown in FIGS. 10 and 11, the tool seating table 170 according to the present invention includes a plurality of tool seating tables 170 arranged in an arcuate manner, and between the tool seating tables 170, (171) are jointed. A rotary motor 172 for rotating the rotary 171 by a desired angle is provided at a lower portion of the rotary 171 and a reciprocating cylinder 174 for linearly moving the rotary 171 at any side of the rotary 171, And an LM guide 173 is provided at the lower portion of the rotary 171. Therefore, the tool seating table 170 is horizontally reciprocated by a desired distance by the reciprocating cylinder 174, and is rotated by the rotary motor 172 by a desired angle.

When the tool chuck 161 thus moved to the replacement position for replacing the tool 165 moves the tool chuck 170 and the tool chuck 161 up and down So that a reciprocating motion or a rotational motion is performed. Alternatively, the tool chuck 161 may be rotated so that the tool chuck 161 containing the tool is returned to the tool chuck 161 so that the tool chuck 161 can obtain the desired tool 165, To the lower tool rest seat.

12, the tool seating table 170 according to the present invention consists of a pair of jaws twisted together so that a tool can be inserted, the back of the jaws having a compression spring 175 therebetween, So that the tool seating stand 170 is always supported in a resilient manner.

For reference, the intermittent device for automatically clamping or releasing the tool automatically by the tool chuck 161 for automatic replacement of the tool is incorporated in the header 160, and a detailed description thereof will be omitted.

In order to perform both the joining operation, the groove machining, and the finishing operation, the friction stir welding composite apparatus 100 according to the present invention must supply air or cutting oil to the tool side in accordance with the operation mode. Therefore, a coolant supply nozzle (not shown) and an air nozzle (not shown) are installed in the lower portion of the head 160 so as to face the tool.

The friction stir welding composite apparatus 100 according to the present invention further includes a control unit 190 for controlling an automatic mode or a manual mode and various components. The control unit 190 may program the entire work process in advance to drive the friction stir welding compound apparatus 100, or may be driven separately for each process. In particular, the control unit 190 controls the three-dimensional motion for joining and machining, the rotational force control of the tool chuck 161, and the loading and unling control of the tool for tool replacement.

The above-described friction stir welding joint device for both groove machining and finishing machining is not limited to the construction and the operation manner of the above-described embodiments. The embodiments may be configured so that all or some of the embodiments may be selectively combined so that various modifications may be made.

100: Friction stir welding compound device
110: bed 120: longitudinal member
121: X-axis feed rail 122: X-axis feed rack
127: X axis feed motor 128: X axis feed pinion
130: transverse member 131: Y-axis feed rail
137: Y axis feed motor 138: Y axis ball screw
140: vertical member 141: Z-axis feed rail
147: Z-axis feed motor 150:
160: Header 161: Tool chuck
165: tool 170: tool seat
171: Rotary 172: Rotary motor
173: LM Guide 174: reciprocating cylinder
175: Compression spring 180: Chip discharge conveyor
190:

Claims (6)

A bed provided with a large area and formed with "T" shaped grooves on the upper surface so as to fix the workpiece;
A pair of longitudinal members spaced apart on both sides of the bed and extending in the X axis direction, and on the respective upper surfaces, an X axis feed rail and an X axis feed link are formed;
An X-axis transporting guide slidably mounted on the X-axis transporting rail, a X-axis transporting pinion engaged with the X-axis transporting rack, and an X- A Y-axis transferring motor for driving the Y-axis transferring plate, a Y-axis transferring motor for reciprocating in the Y-axis direction along the Y-axis transferring rail, and a Y- A transverse member to be mounted;
A vertical member having a Y-axis transporting guide slidably mounted on the Y-axis transporting rail and guided along the longitudinal direction of the transverse member by operation of the Y-axis transporting motor;
An up-down member coupled to a front of the vertical member and reciprocating up and down by a Z-axis feed motor disposed on the vertical member;
And a tool chuck for clamping various tools is formed at a lower portion of the tool holder, and a rotary motor for rotating the tool chuck at a high speed is built in the tool holder. And
And a tool seating table installed at the rear of the bed and storing a plurality of tools for grooving, finishing or friction stir joining so as to be selectively loaded and unloaded into the header by a control unit,
Wherein the plurality of tool rests are constructed of jaws which are wedged together to allow the tools to be inserted, a compression spring is inserted behind the jaws of the jaws to cause the jaws to flex or slacken,
Wherein the plurality of tool seatings are arranged at regular intervals around the rotary, and a rotary motor for rotating the rotary by a desired direction and angle by the control unit is provided at a lower portion of the rotary, wherein the rotary is supported by an LM guide and a reciprocating cylinder Horizontal reciprocating motion,
And an air nozzle and a cutting oil nozzle are formed under the header to selectively eject air or cutting oil according to the operation mode by the control unit.
The method according to claim 1,
And a chip discharge conveyor is installed on both sides of the bed so as to discharge discharged chips to a rear side or a front side of the bed.
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