KR101067864B1 - A gantry type friction stir welding device - Google Patents

Abstract

The present invention relates to a gantry friction stir welding device.

The present invention provides a cross-rail assembly that enables the X-axis movement of the welding point, and a welding tool assembly that enables the Z-axis movement of the welding point, and performs welding by contacting the bonded base material, and the welding tool assembly and the cross-rail assembly. The sliding assembly is configured to include a sliding assembly for enabling the Y-axis movement of the welding point.

According to the present invention, there is an advantage that the friction stir welding of the bonded base material such as a large structure can be made at once.

Friction Stir Welding, Bed, Guide, Servo Motor, Inverter Motor, Cable Carrier

Description

Gantry type friction stir welding device {A gantry type friction stir welding device}

The present invention relates to a gantry friction stir welding device.

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.

However, the above conventional technologies have the following problems.

Friction stir welding apparatus according to the prior art is limited to the welding target of the relatively small size of the movement range of the welding tool for forming the welding surface.

That is, the welding tool performs friction stir welding while moving in the X, Y, and Z axes along the welding portion from the upper side of the welding target. Therefore, when the size of the welding target increases, the moving distance of the welding tool increases, and in particular, when the longitudinal moving distance of the welding target increases, there is a problem that friction stir welding must be performed a plurality of times.

In the welding process, the welding object and the tool make welding at a predetermined welding angle in order to clean the joining quality and the shape of the surface fitting. The friction stir welding device according to the prior art performs the initial welding angle until the end in the plane straight line processing. Since welding is carried out, the surface pits are formed in a constant shape while maintaining a constant bonding quality.

However, during curved processing, the tool moves along the joining interface of the base material while maintaining the initially formed welding angle. If the welding angle is not changed separately, the joining quality is not constant and the surface pits are irregularly shaped so that the appearance is not beautiful. There is a problem.

In addition, in order to prevent this, the welding angle may be manually adjusted for each predetermined portion during curved processing, which has a problem that the time required for the welding operation is increased, and there is also a problem that the productivity is lowered.

An object of the present invention was devised to solve the above problems of the prior art, to provide a gantry friction stir welding device comprising a sliding assembly for sliding the welding tool along the bonding interface of the base material fixed to the bed. will be.

Another object of the present invention is to provide a gantry-type friction stir welding device having a working table for a user to input a control command is located on one side of the sliding assembly.

Still another object of the present invention is to provide a gantry type friction stir welding device which rotates the welding head so that the angular interpolation is performed so that the welding tool always achieves the normal direction with respect to the joining interface of the base material when the surface is processed.

The present invention provides a cross-rail assembly that enables the X-axis movement of the welding point, and a welding tool assembly that enables the Z-axis movement of the welding point and performs welding by contacting the bonded base material, and the welding tool assembly and the cross-rail assembly. The sliding assembly is characterized in that it comprises a sliding assembly to enable the Y-axis movement of the welding point.

In another aspect, the present invention, a welding tool assembly for performing a welding operation in contact with the bonding base material while moving along the bonding interface, and the welding tool assembly is mounted, the cross rail to enable the X-axis movement of the mounted welding tool assembly And a sliding assembly for moving the cross rail assembly on which the welding tool assembly is mounted to enable Y-axis movement of the welding tool assembly. The welding tool assembly includes a shanghai cylinder and a shanghai guide. It is configured to include Z-axis movement is possible.

The sliding assembly is characterized in that it comprises a first sliding assembly provided on one side of the bed to which the bonding base material is fixed, and a second sliding assembly having the same configuration as the first sliding assembly on the other side of the bed.

The sliding assembly includes a rail frame forming a movement path, a rail cover that shields an upper surface of the rail frame, and has a variable length, and a sliding transport device mounted to the rail frame to slide along the rail frame. Characterized in that the configuration.

The sliding assembly is characterized in that connected by the crossrail assembly and the support frame.

The sliding feeder includes a feeder base that accommodates a portion of the support frame and slides along the rail frame, a servo motor provided inside the feeder base to generate rotational force, and is connected to the servomotor to be synchronized. The charge is provided along the longitudinal direction of the rail and the rail frame, it characterized in that it comprises a rack having a tooth shape corresponding to the flat.

The sliding conveying device is characterized in that the L guide is further provided to the left and right sides of the rack.

The first sliding feeder or the second sliding feeder is further provided with a workbench so that the user is located and inputs a control command, and the workbench is connected to a transporter base moving along the rail frame to the base of the transporter base. It is characterized by interlocking with sliding movement.

The welding tool assembly may be fastened by using a main frame slidably mounted to the cross rail assembly, an inverter motor provided at one side of the main frame to generate rotational force, and a rotation shaft and a disk coupling of the inverter motor. A shaft, a spindle connected to the shaft and the universal joint to rotate synchronously, a spindle bracket engaged with the main frame to provide a space for mounting the spindle, and a turn for receiving the spindle therein and rotating separately from the spindle. A frame, a turntable gear engaged with the turnframe, and interpolation means for interlocking the turnframe separately from the rotation of the shaft, provided to be engaged with each other through teeth corresponding to the turntable gear at one side of the mainframe. Characterized in that the configuration.

The interpolation means is characterized in that it comprises an interpolation motor for generating a rotational force, and an interpolation gear that is provided with a rotational force by the interpolation motor and meshes with the turntable gear.

According to the present invention having the above characteristics, it is possible to move the welding tool along the joining interface through the sliding assembly when welding a large structure having a long welding site can be easily performed friction stir welding at once There is an advantage to that.

In addition, one side of the sliding assembly is configured such that a control unit for inputting a control command is located on the side of the sliding assembly so as to be movable as a sliding assembly, so that the user can identify the welding state with the naked eye.

In addition, the friction stir welding is performed while maintaining the normal direction automatically along the joining interface of the welding tool and the joining base material, and thus the welding time is shortened because the process of adjusting the welding angle is not necessary during the diagonal or curve processing. As a result, productivity is expected to increase.

Hereinafter, with reference to the 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.

Figure 1 is a perspective view showing the appearance of a gantry friction stir welding device according to an embodiment of the present invention, Figure 2 is a side view of Figure 1, Figure 3 is a cross-sectional view AA 'of FIG. Is shown.

As shown in these drawings, the gantry friction stir welding device according to the present invention includes a bed 150 for fixing the first bonding base material 10 and the second bonding base material 20 to be joined in a butt fashion, A welding tool assembly 200 for performing friction stir welding while moving along the bonding target portion of the first bonding base material 10 and the second bonding base material 20 fixed to the bed 150, and the welding tool assembly ( It comprises a sliding assembly 100 and the cross-rail assembly 300 to enable the movement of the 200.

And, the rear side (in Figure 1) of the cross-rail assembly 300 is provided with an electrical equipment box 500 for power and hydraulic supply, the right side (in Figure 1) of the cross-rail assembly 300 the electrical equipment box A control unit 400 is further provided to control the crossrail assembly 300, the sliding assembly 100, and the welding tool assembly 200 by using the voltage and hydraulic pressure provided through the 500.

In addition, the welding tool assembly 200 is mounted to the crossrail assembly 300 to be slidably movable in the X-axis direction, that is, in the left and right directions as shown in FIG. 1, and the crossrail assembly 300 is the Y-axis, As shown in FIG. 1, the sliding assembly 100 is mounted to the sliding assembly 100 so as to be slidably moved forward and backward.

In more detail, a guide rail 320 is formed on the front side of the cross rail assembly 300 to be slidably movable in the X-axis direction in the state where the welding tool assembly 200 is mounted, and the guide rail 320 of Support frame 340 is further provided to form a skeleton of the cross-rail assembly 300 to the rear side.

In addition, the lower left and right sides of the support frame 340 are connected to a sliding feeder that slides in the Y-axis direction in one configuration of the sliding assembly 100, respectively.

That is, the sliding assembly 100 is the first sliding assembly 120 connected to the lower end of the support frame 340 for supporting the left side of the cross-rail assembly 300 on the left side of the bed 150, The second sliding assembly 140 is connected to the support frame 340 for supporting the right side of the cross-rail assembly 300 on the right side of the bed 150.

In addition, the first sliding assembly 120 and the second sliding assembly 140 are each provided with separate power sources, and are operated while maintaining a symmetrical state by controlling the sequence through the control unit 400.

On the other hand, the control unit 400 is fastened to one side of the sliding conveying device connected to the lower portion of the support frame 340 of the cross-rail assembly 300 to provide a space for the user to step up (Working table, 440, and a controller 420 to enable the user on the work platform 440 to input the overall operating state and operation command of the friction stir welding device.

In addition, since the worktable 440 is moved even when the user is up, the handle 442 is further provided to protrude upward from the upper surface of the worktable 440 so that the user can grip for the safety of the user, such a handle 442 may be formed in various shapes in addition to the shape shown in FIG. 1.

On the other hand, the sliding assembly 100, as described above, the first sliding assembly 120 and the second sliding assembly 140 are formed on the left and right of the bed 150, respectively.

In detail, the first sliding assembly 120 and the second sliding assembly 140 are formed on the first rail frame 124 and the second rail frame long in the longitudinal direction at the left and right sides of the bed 150. The range of moving the crossrail assembly 300 is limited by 144.

The first rail frame 124 and the second rail frame 144 are connected to the first sliding feeder 720 and the right side of the support frame 340, respectively, which are connected to the left side of the support frame 340. A second sliding feeder 740 is provided.

That is, the moving range of the first sliding conveying apparatus 720 and the moving range of the second sliding conveying apparatus 740 are limited by the first rail frame 124 and the second rail frame 144.

In addition, the upper side of the first rail frame 124 and the second rail frame 144 is further provided with a first rail cover 122 and the second rail cover 142, the length of which is selectively variable through a multi-stage draw-out structure. The interference part is formed to be drawn in according to the movement paths of the first sliding transport device 720 and the second sliding transport device 740.

That is, portions in which the first sliding feeder 720 and the second sliding feeder 740 are not positioned are shielded by the first rail cover 122 and the second rail cover 142, respectively. When the first sliding transfer device 720 and the second sliding transfer device 740 move, a portion corresponding to the moving position is drawn into the inside by the multi-stage withdrawal structure.

On the other hand, since the first sliding feeder 720 and the second sliding feeder 740 moving as described above have the same configuration, the following description will focus on the configuration of the first sliding feeder 720. The detailed description of the second sliding feeder 740 will be omitted.

FIG. 4 is a sectional view taken along the line B-B 'in FIG. 3, and FIG. 5 is an enlarged sectional view showing a sliding feeder that is a main component of the present invention.

As shown in the drawing, the first sliding feeder 720 is provided with a first feeder base 721 that slides along the first rail frame 124 and the first feeder base 721. Inside the first servo motor 722 for generating a rotational force and a reducer 723 for reducing the rotational speed of the first servo motor 722 is provided.

In addition, a pinion 728 that rotates in conjunction with the first thermomotor 722 is further provided at an end of the rotation shaft of the first servomotor 722, and the pinion 728 is disposed at one side of the pinion 728. A first rack 724 is further provided having a tooth corresponding to the tooth.

Accordingly, the pinion 728 received the rotational force of the first servomotor 722 is rotated, and the rotational force of the pinion 727 is transmitted to the first rack 724.

Meanwhile, the first rack 724 is mounted to be fixed to the first rail frame 124. When the pinion 728 rotates in engagement with the first rack 724, the first rack 724 is rotated in accordance with the rotation direction. 1 The feeder base 721 is slidably moved.

On the other hand, the lower side of the first transfer device base 721 sliding as described above is further provided with an LM guide 726 to assist the sliding movement of the first transfer device base 721.

In detail, the guide bar (not shown) of the LM guide 726 is fixed to the first rail frame 124 side by side with the first rack 724, the guide of the LM guide 726 A block (not shown) is mounted to protrude downward from the bottom surface of the first transfer device base 721. Therefore, when the guide block (not shown) is fitted to the guide bar (not shown), it is possible to prevent the left and right flow during the sliding movement of the first transfer device base 721, thereby enabling a stable sliding movement.

In addition, a sliding cable bay bracket 520 is further provided on the left side (in FIG. 5) of the first transfer device base 721 to protect a power supply cable for supplying power to the first servomotor 722.

6 is a perspective view illustrating a state in which a cover is separated from a welding tool assembly that is a main part of the present invention, and FIGS. 7 to 9 are cross-sectional views illustrating an internal structure of the welding tool assembly that is a main part of the present invention; Is shown.

As described above, the welding tool assembly 200 is mounted to the cross rail assembly 300 and is formed to be slidably movable in the X-axis direction.

To this end, the rear side of the welding tool assembly 200 is provided with a mounting portion 600 which is mounted to the cross-rail assembly 300 to slide.

The mounting part 600 is provided in a bar shape to protrude along the longitudinal direction of the mounting frame 660 and the mounting frame 660 to be coupled to the guide rail 320 of the cross-rail assembly 300 Shanghai-dong guide 640 for guiding the Shanghai-dong of the main frame 220 to be described in detail in the mounting frame 660 and the Shanghai-dong cylinder 620 for providing the vertical movement force to the main frame 220 It is configured to include.

In detail, the mounting frame 660 is fastened to the guide rail 320 by using two connection ends 662 positioned to be spaced apart by an interval corresponding to the width of the guide rail 320. That is, although not shown in detail, the guide rail 320 is provided with a cross bar (not shown) corresponding to the connection end 662, and the cross bar (not shown) has a horizontal length of the cross rail 320. It is formed to correspond to.

Therefore, the connection end 662 is fitted to the cross bar (not shown) formed as described above to be slidably movable along the cross bar (not shown) while maintaining the fitted state.

The main frame 220 is provided to the shandong-dong guide 640 and the shandong-dong cylinder 620 while providing a space in which a plurality of components such as the inverter motor 230 and the interpolation means 240 will be described in detail below. It is formed so that it can move up and down.

In detail, the rear side of the main frame 220 has a groove corresponding to the bar shape of the shandong guide 640 so as to be fitted to the shandong guide 640 so that the sliding movement is possible. That is, it is formed in the same structure as the above-described LM guide 726.

In addition, the front side is formed with a hole in which a portion of the inverter motor 230 is mounted so as to pass through and a portion of the interpolation means 240 is penetrated to the plate-shaped plate.

That is, as shown in FIG. 6, the rotating shaft of the inverter motor 230 is fixed to the front side of the main frame 220 so as to face downward, and the interpolation motor 248 which is one component of the interpolation means 240. ) Is fixed by positioning the axis of rotation downward.

A welding tool is mounted below the inverter motor 230, and the shaft 290 of the welding tool is directly connected to the rotating shaft of the inverter motor 230 by a disc coupling 292.

Meanwhile, as described above, the shaft 290 connected to the rotating shaft of the inverter motor 230 by the disk coupling 292 is rotated by the spindle 284 and the universal joint 232 in contact with the bonding base material to perform the welding operation. Is connected to be delivered, the turntable bearing 252 having a double roller 254 structure is provided to the outside of the shaft 290, the turntable gear 250 is provided to the outside of the turntable bearing 252 In addition, the turntable gear 250 may be rotated separately from the rotation of the shaft 290.

As described above, the turn frame 260 is fixed to the lower side of the turntable gear 250 configured to be rotatable separately from the shaft 290, and the spindle bracket 280 is fixed to the lower side of the turn frame 260.

The spindle housing 282 is fixedly mounted to the inside of the spindle bracket 280, and the spindle 284 is connected to the inside of the spindle housing 282 by using the shaft 290 and the universal joint 232. Is provided.

Since the spindle 284 is connected to the shaft 290 using the universal joint 232 as described above, even if the shaft 290 and the spindle 284 have a predetermined slope and a fastening relationship is maintained. It is possible to transmit a rotational force, and a spindle bearing 286 is provided between the spindle housing 282 and the spindle 284 so that the spindle housing 282 and the spindle bracket 280 are separate from the spindle 284. ) Becomes rotatable.

On the other hand, the interpolation means 240 to rotate the turntable gear 250, to interpolate the distortion of the welding angle generated during the friction stir welding operation, the interpolation motor 248 for generating a rotational force, It is connected to the rotation axis of the interpolation motor 248 is rotated, it is configured to include an interpolation gear 242 to rotate in engagement with the turntable gear 250.

Therefore, the rotational force generated through the interpolation motor 248 rotates the interpolation gear 242, and the turntable gear 250 engaged with the interpolation gear 242 is rotated by the interpolation gear 242. The spindle bracket 280 fixed to the turntable gear 250 rotates along the rotation of the turntable gear 250.

As shown in FIG. 8, the turn frame 260 and the spindle bracket 280 are configured such that the spindle bracket 280 is rotatable by a hinge 270, and the rotation range of the spindle bracket 280 is rotated. Is configured to be manually adjustable through the angle adjusting screw (259).

In detail, the spindle bracket 280 is further formed with a stopper bracket 257 protruding outward, the turn frame 260 is further formed with a turn frame fixing bracket 256.

Further, the stopper bracket 257 is further provided with a stopper fixing bracket 258, the angle adjusting screw 259 in the stopper fixing bracket 258 and the turn frame fixing bracket 256 in accordance with the rotation direction The length is provided to be variable, and the welding angle held by the spindle bracket 280 and the turn frame 260 is adjusted by changing the length of the angle adjusting screw 259.

Hereinafter, the operation of the present invention having the configuration as described above will be described.

In order to perform friction stir welding using the gantry type friction stir welding apparatus according to the present invention, two base materials to be bonded are fixed to each other at the upper side of the bed 150.

In the above state, friction stir welding is performed by moving the spindle 284 of the welding tool assembly 200 at high speed along the joint portion.

That is, when the bonding portion of the bonding base material is formed in the X axis direction, the spindle 284 is controlled to move the spindle 284 in the X axis direction so that the spindle 284 moves in the X axis direction. When the joint is formed in the Y-axis direction, the sliding assembly 100 is controlled to move the spindle 284 in the Y-axis direction.

At this time, since the sliding assembly 100 moves the crossrail assembly 300 and the welding tool assembly 200 mounted thereto at the same time in the Y-axis direction, it is possible to perform processing of a relatively large structure at once. .

That is, when friction stir welding a joint part of a structure having a long length in one direction such as a plate constituting a passenger car of a railroad car, the sliding assembly 100 moves along the joint part while the welding tool assembly 200 is fixed. Friction stir welding.

In addition, when processing a large structure as described above, the user inputs a control command through the controller 420 in a state where the user climbs on the work table 440, and the user can perform the work while visually identifying the welding part. Work status is checked.

On the other hand, since the shaft 290, which is a main component of the welding tool assembly 200, is directly fastened using the rotating shaft of the inverter motor 230 and the disk coupling 292, the coupling structure is simplified, and the shaft 290 ) And the spindle 284 are connected through the universal joint 232 so that the rotational force is smoothly transmitted even if the shaft 290 and the spindle 284 are not located on the same line.

Also, the interpolation means 240 rotates the turn frame 260, the spindle bracket 280, and the spindle housing 282 separately from the rotation of the shaft 290 and the spindle 284 so that the welding angle is distorted. Interpolation improves the surface fit and weld quality of the weld surface.

1 is a perspective view showing the appearance of a gantry friction stir welding device according to an embodiment of the present invention.

2 is a side view of the present FIG.

3 is a sectional view taken along the line A-A 'of FIG.

4 is a cross-sectional view taken along the line B-B 'of FIG. 3;

Figure 5 is an enlarged cross-sectional view showing a sliding conveying device which is a main component of the present invention.

Figure 6 is a perspective view showing a state in which the cover is separated from the welding tool assembly which is a main component of the present invention.

7 to 9 are cross-sectional views for showing the internal structure of the welding tool assembly which is a main component of the present invention.

Explanation of symbols on the main parts of the drawings

100 ... sliding assembly 120 ... first sliding assembly

122 ... first rail cover 124 ... first rail frame

140 ... 2nd sliding assembly 142 ... 2nd rail cover

144 ... 2nd Rail Frame 160 ... Base Material Fixing Jig

200 ... Welding Tool Assembly 210 ... Welding Tool Cover

220 ... mainframe 230 ... inverter motor

232 ... Universal joint 240 ... Interpolation means

242 Interpolation Gear 244 Interpolation Motor Bearing Support

246 ... interpolation motor bearing 248 ... interpolation motor

250 ... turntable gear 252 ... turntable bearing

254 ... double roller 256 ... turn frame fixing bolt

257 ... Stopper Bracket 258 ... Stopper Bracket

259 ... angle adjusting screw 260 ... turn frame

270 Hinge 272 Hinge Bracket

280 ... spindle bracket 282 ... spindle housing

284 ... spindle 290 ... shaft

292 ... disc coupling 300 ... crossrail assembly

320 ... guide rail 340 ... support frame

400 ... control unit 420 ... controller

440 ... Workbench 500 ... Electric Box

520 ... Sliding Cable Bearer Bracket 540 ... Shanghai Copper Cable Bearer Bracket

600 ... mounting part 620 ... Shanghai-dong cylinder

640 ... Shangdongdong guide 660 ... Mounting frame

720 ... first sliding shifter 721 ... first shifter base

722 ... first servomotor 723 ... reducer

724 ... first rack 726 ... LM Guide

728 ... Pinion

Claims (10)

A crossrail assembly that enables movement of the X axis of the welding point; A welding tool assembly that enables the Z-axis movement of the welding point and performs welding in contact with the bonding base material; And a sliding assembly for sliding the welding tool assembly and the cross rail assembly to enable Y-axis movement of a welding point. The sliding assembly may include a first sliding assembly connected to the cross rail assembly and a support frame and provided at one side of a bed on which a bonding base material is fixed, and having the same configuration as the first sliding assembly at the other side of the bed. 2 sliding assemblies are included, The first sliding assembly and the second sliding assembly include a rail frame forming a movement path, a rail cover shielding an upper surface of the rail frame, and having a variable length, mounted on the rail frame, and sliding along the rail frame. Sliding transfer device for moving; is provided, The sliding feed device, A portion of the support frame is accommodated, the transfer unit base sliding along the rail frame, the transfer unit is provided in the base, the servo motor for generating a rotational force, and a flat differential connected to the servo motor and synchronously rotated; And a rack provided along the longitudinal direction of the rail frame and having a gear tooth corresponding to the flat car. In the first sliding feed device or the second sliding feed device, Gantry type friction stir welding device is connected to the transfer device base moving along the rail frame, and further provided with a work platform for allowing the user to input a control command while cooperating with the sliding movement of the transfer device base. delete delete delete delete delete delete delete delete delete

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