KR101143941B1 - A Friction stir welding machine for beeline welding - Google Patents

Abstract

The present invention forms a skeleton, the main frame assembly is provided with a pressure supply for supplying the working pressure, the table assembly is mounted to the main frame assembly is fixed to the welding object, the fixed welding object to move back and forth or left and right, It is mounted to the mainframe assembly so as to be movable up and down, and includes a spindle assembly for joining the welding target through friction stir welding and a control assembly for controlling each of the components provided on one side of the mainframe assembly, the spindle assembly includes a pressure supply unit Pressing means for selectively pressurizing the welding target by receiving the working pressure through, the guide frame is mounted to the main frame assembly, provided with a Shanghai East motor to control the position of the Shanghai East while providing a fastening space for the pressing means, and a guide frame Equipped with a sliding movable up and down in A motor frame providing a mounting space for the motor, a spindle connected to the inverter motor using a power transmission member, a welding tool fixed to the spindle using a chuck, and the pressing means includes a cylinder mounted to the guide frame. Is mounted on the motor frame, and comprises a weighing element for measuring the pressure applied by the cylinder. According to this, there is an advantage that the joint surface where the friction stir welding is completed is cleaned.

Spindle, Motor, Cylinder, Jig, Base, Friction Stir Welding

Description

Friction stir welding machine for straight welding {A Friction stir welding machine for beeline welding}

The present invention relates to a friction stir welding device for linear welding.

In general, friction stir welding (FSW) is a part of a non-consumable rotary tool that is harder than the bonded base material is inserted along the butt face of the joint and then joined to the tool. The relative motion of the base material causes the frictional heat to be generated to heat the adjacent joints to a temperature sufficient to soften them.

This creates a so-called “third-body” area that softens around the part where the tool is inserted, and by applying mechanical force to the third body to move the tool along the seam, the heated portion of the tool It is extruded from the advancing side to the retreating side, and the solid state junction is formed by the combination of frictional heat and mechanical processing as described above.

The tool for the joining process as described above is composed of a pin (Pin) is inserted to form a predetermined angle to the base material and a shoulder (Shoulder) to expand the portion heated by the pin, the shoulder by pressing the softened portion It forms a smooth weld surface.

The tool is mounted on a friction stir welding device that enables the tool to move in the X, Y, and Z axes by a plurality of guides and motors. It is possible to perform welding while moving more stably.

Therefore, the friction stir welding device having the above structure can perform the straight processing as well as the curved processing.

However, the friction stir welding device according to the prior art has to control the motor in the straight processing to move the welding tool directly along the seam while maintaining a constant height with the joining base material.

Therefore, in this case, the welding tool must move while constantly pressing the bonded base material, but in the prior art in which the height of the welding tool is adjusted by a motor, the structure of the welding tool is complicated and requires precise control.

An object of the present invention is to provide a friction stir welding device for linear processing capable of friction stir welding while pressurizing a welding target at a constant pressure.

It is another object of the present invention to provide a friction stir welding device for linear processing that selectively controls a combination of the rotational torque of the spindle, the pressing force of the pressing means and the insertion position of the welding tool according to the characteristics of the welding object. .

The present invention forms a skeleton, the main frame assembly is provided with a pressure supply for supplying the working pressure, the table assembly is mounted to the main frame assembly is fixed to the welding object, the fixed welding object to move back and forth or left and right; And a spindle assembly mounted on the mainframe assembly to be movable up and down, the spindle assembly joining the welding target through friction stir welding, and a control assembly provided at one side of the mainframe assembly to control the respective components. There is a pressurizing means for selectively pressurizing the welding target by receiving the operating pressure through the pressure supply unit, and is mounted to the main frame assembly, provided with a shanghai motor to control the shanghai location while providing a fastening space of the pressurizing means The guide frame and the guide frame A motor frame slidably mounted to provide a mounting space for the inverter motor, a spindle connected to the inverter motor using a power transmission member, and a welding tool fixed to the spindle using a chuck. The pressurizing means is characterized in that it comprises a cylinder mounted to the guide frame, the weighing element is mounted to the motor frame, for measuring the pressure applied by the cylinder.

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The spindle assembly is characterized in that the angle adjusting means for pressing the motor frame to set the angle of the welding tool and to fix the set angle.

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According to the present invention having the above characteristics, there is an advantage that the welding tool is pressed by a constant pressure and moved along the joining interface of the welding target by the pressurizing means, so that the joining surface where the friction stir welding is completed is neat.

In addition, according to the present invention, friction stir welding can be performed by selectively combining rotation torque, pressing force, pin insertion position, and the like in response to the surface curvature of the welding target and the characteristics of the material. Therefore, there is an advantage that the friction stir welding efficiency is increased.

Hereinafter, with reference to the accompanying drawings will be described a specific embodiment of the present invention. However, the spirit of the present invention is not limited to the embodiments presented, and those skilled in the art who understand the spirit of the present invention can easily suggest other embodiments within the scope of the same idea.

1 is a perspective view showing the appearance of the friction stir welding device for straight processing, which is an embodiment of the present invention, Figure 2 is an exploded perspective view of each assembly of FIG.

As shown, the friction stir welding device for straight processing according to the present invention welds the table assembly 200 and the fixed welding target to which the welding target is fixed to the mainframe assembly 100 forming the skeleton by friction stir welding. The spindle assembly 300 and the control assembly 400 for controlling the respective components are combined.

In detail, the mainframe assembly 100 is provided with a space in which the table assembly 200 is mounted on the upper side, and a control box 420 in which a plurality of electrical components are accommodated in one configuration of the control assembly 400 on the rear side. ) Is mounted, and the pressure supply unit 120 to which the operating panel 440 which is another component of the control assembly 400 is mounted, and the main frame 140 vertically connected to the pressure supply unit 120. It is configured to include.

The main frame 140 is formed in a substantially vertical pillar shape, and the spindle assembly 300 is mounted to the front side.

In addition, the spindle assembly 300 is configured such that a portion of the spindle assembly 300 is slidable up and down. Description thereof will be described in more detail with reference to the accompanying drawings below.

On the other hand, the upper surface of the pressure supply unit 120 on which the table assembly 200 is mounted is provided with a predetermined space recessed downward, the space of the front and rear movement means 240 which is one component of the table assembly 200 in this space Part is accepted.

In addition, the pressure supply unit 120 is further provided with a compressor (not shown) for providing a pneumatic pressure to the pressure means 330, etc. to be described in detail below, the air pressure provided by such a compressor to the main frame 140 It may be provided to the pressing means 330 through the pneumatic cable passing through.

The front and rear movement means 240 forms the lowermost part of the table assembly 200, and is mounted to slide the table assembly 200 in the front and rear directions while being mounted on the pressure supply part 120. The upper side further includes a left and right moving means 220 for receiving the table 260 to which the welding target is fixed to allow the table 260 to slide in the left and right directions.

Table assembly 200 having the above configuration will be described in more detail with reference to the accompanying drawings below.

On the other hand, the front side of the pressure supply unit 120 is provided with a fence 160 to prevent a safety accident that occurs during welding, the operating panel 440 is further provided on the front side of the fence 160.

The operating panel 440 includes an operation button 442 for a user to input a control command and a display 444 in which a control state is shown, and the pressure supply unit 120 is provided by a separate panel frame 446. Connected with.

3 is a front sectional view for showing the structure of the table assembly which is a main component of the present invention.

As described above, the table assembly 200 has a front and rear movement means 240 that is partially accommodated in the pressure supply unit 120 at the lowermost side, and the left and right movement means 220 to the upper side of the front and rear movement means 240. ) Is provided, the table 260 is mounted on the left and right moving means 220, the position of the table 260 is moved back and forth and left and right by the front and rear movement means 240 and the left and right movement means 220. It is configured to be movable.

Looking at this in more detail, first, Figure 4 is a view showing a fastening structure of the front and rear movement means that is fastened to the pressure supply unit of the table assembly which is the main component of the present invention, Figure 5 is a front and rear movement means mounted to the pressure supply unit The figure seen from above is shown.

As shown in the drawing, the upper side of the pressure supply part 120 is provided with a front and rear movement shaft 243 in which a traveling direction of the front and rear movement block 244 connected according to the rotation direction is switched.

The front and rear movement shaft 243 is formed with a screw thread on the outer circumferential surface in the form of a screw, the front and rear movement block 244 is wrapped around the front and rear movement shaft 243 in accordance with the direction of rotation to move along the front and rear movement shaft 243. It is formed to.

And, both ends of the front and rear movement shaft 243 is fixed by the front and rear movement shaft fixture 247 provided in the pressure supply unit 120, the front and rear movement shaft fixture 247 is provided with a ball bearing the front and rear movement shaft 243 is rotatable in a fixed position.

In addition, the handle 241 is further connected to the front and rear movement shaft 243 provided as described above so that the user can grip and rotate the movement direction of the front and rear movement block 244 according to the direction in which the user rotates. .

On the other hand, the front and rear movement shaft 243 may be controlled to be automatically rotated by being connected via a coupling with a separate servo motor in place of the handle 241.

The front and rear movement guide rails 245 are further provided on both left and right sides of the front and rear movement shaft 243, and the front and rear movement guide rails 245 are slidably moved in the mounted state. Block 246 is further provided.

Then, the front and rear movement frame 244 and the front and rear movement guide block 246 is mounted to the front and rear frame 242.

Accordingly, the front and rear movement frame 242 is slidably moved forward / backward by the front and rear movement block 244 and the front and rear movement guide block 246 according to the direction in which the front and rear movement shaft 243 rotates.

The left and right movement means 220 is provided above the front and rear movement frame 242.

6 is a view of the left and right moving means provided on the upper side of the front and rear moving means viewed from above.

The left and right movement means 220 is a left and right movement shaft 223 rotatably fixed by the left and right movement shaft support member 224 on the upper and rear movement frame 242, the rotation of the left and right movement shaft 223 The left and right movement block 225 in which the sliding movement direction is determined according to the direction and the left and right movement motor 221 which provides the rotational force to the left and right movement shaft 223 enable the left and right sliding movement of the table 260 provided on the upper side. Let's do it.

And, in order to assist the left and right sliding movement of the table 260, the left and right movement guide rails 226 are provided on the front side and the rear side of the left and right movement shafts 223 in the horizontal direction, respectively. In addition, the left and right movement guide rails 226 are further provided with a plurality of left and right movement guide blocks 227 sliding in a mounted state.

In addition, one side of the left and right movement shaft 223 is provided with a limit sensor 228 near each end.

The limit sensor 228 detects the position of the left and right movement guide block 227 so that the left and right movement guide block 227 does not cross the limit sensor 228 by the rotation of the left and right movement motor 221. Send the.

The table 260 is fixed to the left and right movement block 225 and the left and right movement guide block 227 so that the table 260 can be slid left or right according to the direction in which the left and right movement motor 221 rotates. have.

In addition, the fixing jig 262 is further provided on the upper side of the table 260 that slides as described above. The fixing jig 262 may be formed in various ways as the welding target is seated and fixed.

On the other hand, as described above, the front assembly of the main frame 140 is provided with a spindle assembly 300 for performing friction stir welding to the welding target fixed to the table assembly 200.

7 is a front view of a spindle assembly which is a main component of the present invention, FIG. 8 is a side view of FIG. 7, and FIG. 9 is a view for showing a fastening structure of the spindle assembly shown in FIG. 7. 10 is a cross-sectional view taken along the line AA ′ of FIG. 7.

As shown in these drawings, the spindle assembly 300 is mounted to the main frame 140 through a plurality of guide frames 310 so that the motor frame 350, which will be described below, is slidably moved up and down.

In addition, the motor frame 350 is connected to the inverter motor 360 to generate a rotational force, and a power transmission member 364 to the inverter motor 360 to rotate synchronously and the spindle 380 and the spindle 380 The welding tool 340 which is fastened through the chuck 342 and performs friction stir welding to the welding target is connected in series.

The guide frame 310 is mounted on the main frame 140, the motor guide frame 312 is provided with a shanghai east motor 320 on the upper side, and is mounted to the motor guide frame 312 to slide up and down And, it is composed of a cylinder guide frame 314 is provided with a cylinder 332 which is one component of the pressing means 330.

In detail, the motor guide frame 312 is formed in a substantially flat shape, and is provided with a shanghai-dong motor mount 323 protruding forward from a central portion of the upper end to form a mounting space of the shanghai-dong motor 320.

Further, cable guides 311 are further provided on left and right sides of the shanghai-dong motor mount 323, and a plurality of power and signal cables drawn out of the control box 420 and pneumatic cables drawn out from the compressor are provided in the table. Guide to the assembly 200 and the spindle assembly 300. In addition, the cable guide 311 is also formed on the upper end of the cylinder guide frame 314.

Below the shandong copper motor 320 is provided a shandong copper shaft 324 connected to the motor shaft and the shandong copper coupling 322 of the shandong copper motor 320.

The shandong shaft 324 is rotatably provided at both ends of the shank shaft 324 is fixed by a shank shaft shaft fixture 321 having a bearing.

In addition, the shandong copper shaft 324 is provided with a shandong block 329, the shandong block 329 is moved up and down in accordance with the rotation direction of the shandong block (324).

In addition, left and right sides of the shandong shaft 324 is provided with a shandong copper guide rail 326 in parallel with the shanghai shaft 324 along the longitudinal direction of the motor guide frame 312.

In addition, the Shanghai-dong guide rail 326 is provided with a plurality of Shanghai-dong guide blocks 328 that slide up and down in a mounted state, and the Shanghai-dong block 329 and Shanghai-dong guide block 328 have the cylinders. The guide frame 314 is mounted.

Accordingly, the cylinder guide frame 314 is capable of selectively sliding up and down according to the rotational direction of the shankdong motor 320 in the state of being mounted to the motor guide frame 312.

On the other hand, the motor guide frame 312 is formed with a plurality of slots perforated to the outside of the Shanghai-dong guide rail 326, a plurality of fixing members 394 are fastened by rotation, the main frame ( 140).

Of course, a groove corresponding to the slot is formed in the main frame 140 so that the fixing member 394 may be fastened.

In addition, the adjustment member 392 is further provided on both the lower left and right sides of the motor guide frame 312.

The control member 392 is protruded to a height corresponding to the thickness of the motor guide frame 312 so as to press the side of the motor guide frame 312 in the main frame 140, according to the rotation direction The degree of pressing the motor guide frame 312 may be changed to tilt the motor guide frame 312.

In addition, the fixing member 394 fixes the motor guide frame 312 to the main frame 140 while the motor guide frame 312 is inclined by the adjusting member 392 as described above. The angle adjusting means 390 for changing the welding angle of the) is formed.

On the other hand, the cylinder guide frame 314 has a flat plate shape having a narrower width than the motor guide frame 312, the above-mentioned cable guide 311 is formed on both sides of the upper left and right, the center portion of the cylinder 332 described above A cylinder mount 339 which is a mounting space is formed.

In addition, the above-described motor frame 350 is positioned below the cylinder mount 339, and the weighing element 334 which forms the pressing means 330 together with the cylinder 332 is disposed on the motor frame 350. ), And when the piston 331 of the cylinder 332 is lowered, the pressure applied to the weighing element 334 is measured.

In the embodiment of the present invention, a load cell is used as the weighing element 334.

On the other hand, the end of the piston 331 of the cylinder 332 is connected to the motor frame 350, the left and right sides of the movement path of the piston 331 sliding up and down in the state in which the motor frame 350 is mounted A pressure guide rail 335 to be movable and a pressure guide block 336 provided on the pressure guide rail 335 and fastened to the motor frame 350 are provided.

That is, the motor frame 350 is mounted to be movable up and down corresponding to the stroke of the piston 331 in a state in which it is fastened to the end of the piston 331 and the pressure guide block 336, the motor frame ( One side of the 350 is further provided with an indicator 338 for measuring the pressure change in accordance with the movement distance of the cylinder 332.

On the other hand, the piston 331 is set so that the initial position has a free space up and down inside the piston rod 333, the welding tool 340 is pushed upwards during the initial pressure setting to have a free stroke.

In addition, although not shown, a relief valve is further provided on one side, and when a pressure higher than a required pressure is supplied, the relief valve is formed to be discharged to the outside.

Therefore, when the welding tool 340 pressurizes the welding object due to the relief valve and the set clearance, the welding object may be pressurized at the same pressure corresponding to the surface curvature of the welding object.

The motor frame 350 is formed to have a width corresponding to the cylinder guide frame 314. In addition, a weighing element mount 352 on which the weighing element 334 is mounted is provided on the front side.

In addition, an inverter motor 360 for generating a rotational force is mounted below the weighing element mount 352, and the motor shaft of the inverter motor 360 is in series with the spindle 380 by the power transmission member 364. Connected. In the embodiment of the present invention, the power transmission member 364 uses a disk coupling.

The spindle 380 is rotatably provided in the spindle housing 381, and a spindle bracket 386 is further provided outside the spindle housing 381 so as to rotate in a fixed state to the motor frame 350. Can be.

And, the end of the spindle 380 is provided with a chuck 342 for fixing the welding tool 340, the friction stir welding is performed by transmitting the rotational force of the inverter motor 360 to the welding tool 340 do.

On the other hand, one side of the motor frame 350 is an air pipe 354 and an air injection nozzle 356 for injecting high-pressure air to the welding tool 340 by using the air pressure provided from the main frame 140 is further It is provided.

Hereinafter, the operation of the friction stir welding device for linear processing according to the present invention having the configuration as described above will be described.

In order to perform friction stir welding using a friction stir welding device for linear processing according to the present invention, a welding target is first fixed to the table 260 using a fixing jig 262. At this time, the front and rear movement means 240 is moved away from the vertical lower side of the spindle assembly 300 in the state moving to the front or rear side so that the table 260 is positioned.

As described above, when the welding target is fixed to the table 260, the table 260 is moved vertically below the spindle assembly 300 by rotating the forward and backward operation handle 241 of the forward and backward movement means 240. Let's do it.

In such a state, friction stir welding is performed by operating the spindle assembly 300 through the operating panel 440.

At this time, the friction stir welding is carried out through the control assembly 400 according to the characteristics of the welding target material and the control command of the welding path and the pressurizing means 330 and the Shanghai east motor 320 and the inverter motor 360 are already set. Is carried out in a state.

In detail, the inverter motor 360 is to control the rotation torque according to the characteristics of the material, the pressing means 330 is a pressing force so that the pressure to press the welding target through the cylinder 332 is made uniform throughout the processing path To control.

In addition, the Shanghai copper motor 320 controls the position of the welding tool 340 to move in a state in which the welding tool 340 maintains a constant depth to the welding target, combining a control command suitable for the characteristics of various materials Can be entered.

1 is a perspective view showing the appearance of a friction stir welding device for straight processing, which is an embodiment of the present invention.

Figure 2 is an exploded perspective view of the assembly of Figure 1;

Figure 3 is a front sectional view for showing the structure of the table assembly which is the main component of the present invention.

Figure 4 is a view showing a fastening structure of the front and rear movement means is fastened with the main frame of the main assembly of the present invention.

Figure 5 is a view of the front and rear movement means mounted on the main frame from above.

Figure 6 is a view of the left and right moving means provided on the upper side of the front and rear movement means viewed from above.

7 is a front view of a spindle assembly which is a main component of the present invention.

8 is a side view of FIG. 7;

9 is a view for showing the fastening structure of the spindle assembly shown in FIG.

FIG. 10 is a sectional view taken along the line A-A 'of FIG. 7; FIG.

Explanation of symbols on the main parts of the drawings

100 ..... Mainframe assembly 120 ..... Pressure supply

140 ..... Mainframe 160 ..... Fence

200 ..... Table assembly 220 ..... Right and left

221 ..... left / right moving motor 222 ..... left / right moving frame

223 ..... left and right shafts 224 ..... left and right shafts

225 ..... left and right movement block 226 ..... right and left movement guide rail

227 ..... left / right movement guide block 228 ..... limit sensor

229 ..... left / right travel coupling 240 ..... forward and backward means

241 ..... forward and backward movement handle 242 ..... forward and backward movement frame

243 ..... forward and backward shaft 244 ..... forward and backward movement block

245 ..... forward and backward guide rail 246 ..... forward and backward guide block

247 ..... Forward and backward shaft fixture 260 ..... Table

262 ..... Fixed jig 300 ..... Spindle assembly

310 ..... Guide frame 311 ..... Cable guide

312 ..... Motor guide frame 314 ..... Cylinder guide frame

320 ..... Shanghai East Motor 321 ..... Shanghai East Shaft Fixture

322 ..... Shanghai dong coupling 323 ..... Shanghai dong motor mount

324 ..... Shanghai East Shaft 326 ..... Shanghai East Guide Rail

328 ..... Shanghai Building Information Block 329 ..... Shanghai Building Block

330 ..... Pressurization means 331 ..... Piston

332 ..... Cylinder 333 ..... Piston Rod

334 ..... Weighing element 335 ..... Pressurizing guide rail

336 ..... Pressurization guidance block 338 ..... Indicator

340 ..... Welding Tool 342 ..... Chuck

350 ..... motor frame 352 ..... weighing element mount

354 ..... air pipe 356 ..... air spray nozzle

360 ..... Inverter motor 362 ..... Motor shaft

364 ..... power transmission member 380 ..... spindle

381 ..... spindle housing 382 ..... spindle shaft

386 ..... Spindle bracket 392 ..... Adjusting member

400 ..... Control Assembly 420 ..... Control Box

440 ..... operating panel 442 ..... control buttons

444 ..... Display 446 .... Panel Frame

Claims (8)

A mainframe assembly forming a skeleton and having a pressure supply unit for supplying a working pressure; A table assembly mounted to the main frame assembly to fix a welding object and to move the fixed welding object to the front, rear, left and right sides; A spindle assembly which is mounted to the mainframe assembly so as to be movable up and down, and which joins a welding object through friction stir welding; And a control assembly provided at one side of the mainframe assembly to control each of the components. The spindle assembly, Pressing means for selectively pressing the welding target by receiving the operating pressure through the pressure supply; A guide frame mounted to the main frame assembly and provided with a shanghai motor to control a shanghai location while providing a fastening space for the pressing means; A motor frame slidably mounted up and down on the guide frame to provide a mounting space for the inverter motor; A spindle connected to the inverter motor using a power transmission member; The welding tool is fixed to the spindle using a chuck, The pressing means, A cylinder mounted to the guide frame; Mounted to the motor frame, friction stir welding device for straight processing, characterized in that it comprises a weighing element for measuring the pressure applied by the cylinder. delete delete delete delete The method of claim 1, wherein the spindle assembly, Friction stir welding device for straight processing, characterized in that the angle adjusting means for pressing the motor frame to set the angle of the welding tool and to fix the set angle. delete delete

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