KR100855570B1 - An automatic a welding machine for manufacture of steel grating - Google Patents

Abstract

The present invention relates to an automatic welding device for producing steel grating, which is capable of simultaneously welding a surface welding and a spot welding by means of a torch unit.

The jig frames 6, 6 'for assembling the steel grating 15 are installed in the straight direction on the lower layer 8 of the work table 10, and the torch unit 50 rotates the pitch shifting ball screw 101. When the steel grating is subjected to spot welding and spot welding while moving by one pitch, and the grating assembly in the second jig 6 'is welded, the torch unit 50 is operated by the operation of the impression cylinder 303 of the transfer die 306. Is carried out on the distal end of jig 2 (6 ') to carry out the welding in the reverse direction, the welding direction of the jig 1 (6) is carried out in the forward direction.

Description

An automatic a welding machine for manufacture of steel grating}

1 is an exploded perspective view of an end bar of the steel grating according to the present invention separated from the eye bar

Figure 2 is a side perspective view of the transfer unit for transporting the two jigs and the torch unit assembled the grating to a single-layered work object formed in a single layer in order to automatically weld the steel grating according to the present invention

3 is a plan view of FIG. 2 in accordance with the present invention;

4 is a side view of FIG. 2 according to the present invention;

FIG. 5A is a front view of a torch unit stopped on a jig for performing a welding operation on a grating assembly according to the present invention; FIG.

5B is a front view of the torch unit according to the present invention transferred on its tip to end the grating welding in jig 1 and weld the grating assembly inside jig 2;

6 is a side view of a torch unit for grating welding according to the present invention;

7A is a front view of a welding apparatus in a state in which a face welding torch and a spot welding torch are connected to a lifting device during grating welding according to the present invention;

Figure 7b is a detailed view of the grating welding according to the present invention, the face welding torch and the spot welding torch are shown as a specific lifting device

Figure 8a is a front view of the lifting unit for the surface welding torch unit of the grating automatic welding device according to the present invention.

Figure 8b is a plan view showing a coupling state of the pinion and the rack of the lifting unit for the surface welding torch unit of the grating automatic welding device according to the invention

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Figure 8c is a plan view showing the pinion and the lift of the lifting unit for the surface welding torch unit of the grating automatic welding device according to the present invention separated state

Figure 9a is a plan view of the spot welding torch holder of the welding position adjusting freedom device for the torch unit of the grating automatic welding device according to the present invention

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Figure 9b is a front view of the surface welding torch holder of the welding position adjusting freedom device for the torch unit of the grating automatic welding device according to the present invention

Figure 9c is a side view of the spot welding torch holder of the welding position adjusting freedom device for the torch unit of the grating automatic welding device according to the present invention

10A is a partially enlarged view of a point and face welding torch holder according to the present invention, in which two spot welding stick guides are fitted on an eye bar and one on a twist bar.

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10B is a partially enlarged view of a point and face welding torch holder according to the present invention, in which two face welding stick guides are fitted on the end bar and one on the eye bar;

Figure 11 is an enlarged longitudinal cross-sectional view of the tip of the surface welding torch unit according to the present invention in the surface welding position;

12A is a position diagram of a stick guide showing a welding position for spot welding and surface welding by a torch unit according to the present invention, in which two spot welding stick guides are fitted on an eye bar and one on a twist bar. Floor plan,

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12B is a position diagram of a stick guide showing a welding position for spot welding and surface welding by a torch unit according to the present invention, wherein two surface welding stick guides are fitted on the end bar and one on the eye bar. Floor plan.

[Names of symbols for main parts of the drawings]

5: Steel Grating 6. 6 ': Jigtle

7: end bar fixing jig cylinder 8: downstairs

9: upstairs 10: single-story workbench

14 cylinder 17 crossover lower frame

20: torch unit lifting cylinder

20 ': cylinder rod for torch unit lifting

32: torch support arm 33: torch fixing rod

35: Torch unit lifting rod 35 ': Inward flange

37: free device 41: spot welding torch

50: torch unit 51: surface welding torch

100: drive unit

101: torch unit pitch feed ball screw

105: Ball Screw Bearing Bracket

106: die for body                 

208: Torch Holder Stick Guide

301: torch unit frame 306: transfer die

The present invention is an automatic welding that can automatically weld each intersection and joint of the grating assembled by the assembly jig frame at the same time when manufacturing a steel grating, which is often used for the cover of the sewer or stairs of the building Apparatus, in more detail, the eye bar and the twist bar assembled in the form of a lattice, the intersection of each other is spot-spot welded by a spot welding torch unit, while both ends of the eye bar are bonded to the inner peripheral surface of the end bar The joining part is to provide automatic welding device for steel grating manufacturing that can improve the productivity of grating and reduce the production cost by automating the simultaneous welding of the vertically by the surface welding torch unit.
Since conventional welding apparatus for manufacturing steel grating is composed of one torch, each welder has to deal with structural defects of the welder that must weld each welding part of steel grating assembly using one torch. In addition to welding defects in the manufacture of steel gratings, in particular, in addition to the fact that there are many welding spots, the welding work conditions and the end of the welding work such as spot welding at the intersection of the eye bar and the twist bar intersecting each other to complete one steel grating Steel grating could not be manufactured efficiently due to different welding working conditions, such as surface welding, in which a perpendicular plane to the joint where both ends of the eyebars joined to each other was vertically welded to the inner circumferential surface of the bar. Also in the welding sequence when manufacturing gratings Regardless of the method of welding or pressure welding, the joints where both ends of the eyebars are joined to the inner circumferential surface of the endbar as a secondary welding process only during the holiday after the spot welding process is completed on the intersection where the bar and the twist bar intersect with each other. As the finished product can only be completed through the surface welding process for the above, due to the complex cause of structural weakness and complicated working condition of the welding machine, the welding operation for manufacturing steel grating could not be expected.

The present invention is to solve the above problems, the present invention is the automatic welding device for manufacturing steel grating according to the present invention is pressurized by a cylinder to prevent the steel grating assembled by the assembly jig to flow to the torch unit 1 pitch Jig the torch unit twice so that welding can be carried out one by one to complete the welding of the grating assembly assembled in the jig 1, and to continuously weld the grating assembly assembled in the 2 jig. A torch unit conveying unit for skipping over the distal end of the torch to allow the welding operation to proceed in reverse direction;

In order to weld the steel grating, the jig frame formed to be assembled in a regular form to assemble the grating is transported so that the torch unit jumps in the forward and reverse directions, and after the transfer, the welding work in the forward and reverse directions is performed in a straight direction. A two-stage worktable on which two jigs are installed, and a conveying part for lifting and conveying the torch unit;

The torch unit includes a torch unit pitch shifting ball screw for moving the torch unit by one pitch so as to perform spot welding and surface welding at the same time;

An impression cylinder which pulls out the grating finished with surface welding and spot welding and lifts the torch unit upward to facilitate the replacement operation when replacing with a new welded steel grading;

The lifting cylinder is connected to the torch unit frame and is fixed by a support to drive the torch unit forward / reverse;

The face welding torch is disposed on the left and right sides of the torch fixing rod so that the steel grating assembly can be simultaneously welded and spot welded, and the spot welding torch is disposed between the left and right sides of the face welding torch, A power intermittent cylinder which descends to be able to be able to rise, and ascends at the same time as the welding ends;

Three tricycle stick guides for positioning the tip of the torch to abut the correct welding position when the torch unit is lowered onto the steel grating assembly for welding operation;

The stick guide presses two stick guides on the eye bar during spot welding, while the other stick guide presses on the twist bar and presses the stick guides on the end bar. The other one of the stick guides is achieved by adjusting the tip of the torch in position to be welded so that it can fit on the eyebar and perform an accurate welding.

The present invention is installed so that the transfer unit and the torch unit can be moved in the same direction on a single-floor worktable, so that the transfer unit is welded to the grating assembly in which the torch unit is assembled inside the jig frame 1, and jig number 2 is completed at the same time. The torch unit can be moved to the tip end of the frame, and the torch unit is reversed in the welding direction by taking out the steel grating in the jig frame No. 1 that has been welded by reverse welding of the torch unit and replacing it with a new welded grating. It is characterized by being able to continue the welding operation without interruption while changing to.

According to the present invention, since the worktable is formed in a single layer, the conveying part for carrying out the conveying operation by lifting the torch unit upward can be installed at a position higher than the position where the two supporting frames are installed so that the conveying part easily raises the torch unit for conveying. It can be characterized by.

In addition, the present invention is characterized in that two jigs are installed in the same straight direction so that the torch unit can perform welding without interruption.
In addition, according to the present invention, the steel grating assembly is simultaneously lowered to the spot welding position on the main cylinder so that the spot welding and the face welding can be performed at the same time. The surface welding is performed simultaneously with the spot welding while descending to the lower side by the lowering portion.

According to the present invention, the spot welding torch unit and the face welding torch unit are arranged on the left and right sides so as to perform the surface welding while vertically lowering the right angled portion where both ends of the eye bar are joined to the inner circumferential surface of both end bars. Each torch unit is installed one by one, the spot welding torch unit for welding the intersection of the intersection of the eye bar and the twist bar is characterized in that it is arranged at regular intervals on the inner side where the face welding torch unit is installed.

In addition, the present invention is a torch holder housing and the three-stick stick guide is installed directly under the spot welding two stick guides are fitted on the eye bar and the other stick guide is fitted on the twist bar, the tip of the torch unit for spot welding This eye bar and twist bar can abut on the spot welding position where the intersections intersect each other.In addition, during the surface welding, two stick guides are fitted on the end bar, and the other stick guide is on the eye bar. It is characterized in that the tip of the surface welding torch unit is brought into contact with the surface welding site, which is both ends of the eye bar to be joined to the inner circumferential surface of the end bar, so that only the correct welding site can be welded.

Hereinafter, a preferred embodiment of the automatic welding device for manufacturing steel grating according to the present invention will be described in detail based on the accompanying drawings.

1 is a partially exploded perspective view of the steel grating to be automatically welded in the present invention,

FIG. 2 is a side perspective view of a workbench provided with two jigs for assembling the grating and a torch unit and a conveying unit for transferring the torch unit to a desired position so as to automatically weld the steel grating.

In the lower layer 8 of the stepped work platform 10, which is formed in a step shape, two steel gratings 5 to be welded are fixed to the cylinder 14 and 7 so that the front and outer surfaces thereof are fixed to a certain size to prevent flow. The jig frames 6 and 6 'are installed in a straight direction, and the dropping device (not shown) separately installed on the upper parts of the two jig frames 6 and 6' and the eye bar 1 and End bar (3) and twist bar (2) is assembled to fall, the twist bar (2) is assembled to the steel grating (5) in the process of being fitted into the hole (4) perforated in the eye bar (1) Is complete.

The upper frame 16 and the lower frame 17 are formed in an inverted "u" shape on the jig frame 6 and 6 ', and the lower end of the cross-type upper frame 16 moves the pitch of the torch unit. The guide frame 102 is fitted to the rail 102 to enable reciprocation, and the lower frame 17 is fixed on the torch unit lifting rod 35.

In addition, the drive unit 100 including the sensor and the motor is connected by a coupling 104 to move the torch unit pitch movement ball screw 101, and the torch unit pitch movement ball screw 101 is disposed at a lower portion thereof. The torch unit pitch movement guide rail 102 is fitted in the upper portion of the ball screw bearing bracket 105 to be fitted, and the upper end portion is fixed to the back surface of the die 106 for the body, so that the ball screw is moved by the operation of the driving unit 100. The bearing bracket 105 is driven to move the torch unit 50 including the spot welding torch 41 and the surface welding torch 51 to a portion to be welded to the steel grating 5 by one pitch.

At this time, the torch unit frame 301, in which both loads are fixed to the torch unit pitch shift guide rail 102, has the torch unit 50 assembled to the first jig 6 inside the steel grating 5 After the welding is finished, the torch unit 50 is lifted up when the torch unit 50 is moved over the distal end of the jig 6 'to weld the steel grating 5 assembled inside the second jig 6'. The lower end of the impression arm 309 which is attached to the rod 308 of the impression cylinder 303 which can jump is fixed.

The chain gears 307 and 307 'are installed at both ends in the longitudinal direction on the upper layer 9 of the single-floor work platform 10, and the transfer chain (between the chain gears 307 and 307') is provided. 305 is connected to lift the torch unit frame 301 by the contracting action of the rod 308 of the impression cylinder 303 which is attached to the support 310 by the operation of the drive motor 304 is connected to the side The torch unit frame 301 is guided and driven on the guide rail 302 in the forward and reverse directions by the rotation of the transfer chain 305.

The tip of the drive transverse 209 fixed in parallel on the transfer die 306 is bonded to each other against the torch unit frame 301 by white paper 37, but the torch unit frame 301 is white paper 37 Formed to be folded in the operation of the lifting cylinder (303) to lift the torch unit 50 upwards.

On the cross-shaped upper frame 16, a torch unit lifting cylinder 20 and a spring case 31 'having a longitudinally mounted tension spring 31 on the inside thereof are fixed, and the torch unit lifting cylinder 20 is fixed. The rod 20 'is fixed on the intersecting lower frame 17, and the torch support arm 32 of the lower frame 17 fixes the torch unit lifting rods fixing both ends of the torch fixing rod 33 ( The torch fixing rod 33 is lowered by the operation of the lifting cylinder 20 to weld the steel grating 5 so that the tip 202 of the torch unit 50 is lowered to the spot welding position. To come.

At this time, while the tip 202 of the surface welding torch 51 is lowered lower than the spot welding position, the joints between both ends of the eye bar 1 and the inner circumferential surface of the end bar 3 should be welded vertically. Therefore, in order to lower the surface welding torch 51, the surface welding rod support arm 34 into which the upper end of the torch lifting rod 211 is inserted must be lowered separately, and the surface of the surface welding torch support arm 34 is lowered. In the center, the upper end is connected to the tension spring 31 so that the upward action is smooth and the downward action is performed by the reduction device 25 and the power that decelerate the rotation of the motor 24 and the pinion 21 which drive the pinion 21. In order to lower the pinion 21 and the rack torch elevating rod 211 by the intermittent action, the surface welding torch support arm 34 has to be lowered to be coupled with the pinion 21.

The torch unit 50 disposed on the torch fixing rod 33 is fixed by one surface welding torch 51 on each end side of the torch fixing rod 33, respectively, and the spot welding torch ( 41, an appropriate number is fixed inside the surface welding torch 51 is fixed.

The torch fixing rod 33 is fitted with a free device 37 for fixing the torch tip 202 on the correct position to be welded, and on one side of the free device 37 with a bearing. The torch elevating rod 211 is supported by 204, and is supported by the spot welding torch rod 211 '.

At the bottom of the device 37, a tri-stick stick guide 208 is installed downward for accurate face welding and spot welding. In the case of face welding, two stick guides 208 are attached to the end bar 3. The other one stick guide 208 is configured to fit over the eye bar 1, and at the time of spot welding, two stick guides 208 are fitted over the eye bar 1 The other one of the stick guides 208 is sandwiched on the twist bar 2 while the torch tip 202 for the surface welding is connected to the joint at which both ends of the eye bar 1 are joined to the inner circumferential surface of the end bar 3. The tip 202 of the torch rod 211 'can be precisely positioned at the intersection where the eye bar 1 and the twist bar 2 intersect during spot welding while the surface welding can be performed beautifully. This position allows welding in the correct position .

Unexplained symbols in the drawings,

38 is a wire supply for welding,

39 is a Co2 gas ball,

38 is a nozzle, 35 'is an inward flange, 19 is a face welding torch lower portion;

19 'is a face welding torch lower portion support plate integrally connected to the frame (17)

In the automatic welding device for steel grating manufacturing according to the present invention configured as described above, the ball screw bearing is screwed into the ball screw 101 while the torch unit pitch movement ball screw 101 is rotated by the operation of the driving unit 100. Since the bracket 105 is moved by one pitch, and the upper end of the bearing bracket 105 is fixed to the rear surface of the die 106 for the body, the torch unit 50 is moved by one pitch. Since the upper end of the kit 105 is fixed to the back of the body die 106, the surface welding and spot welding on the steel grating 5 can be simultaneously performed while moving the torch unit 50 by one pitch.

When the welding to the steel grating 5 assembled inside the jig 1 is completed, the transfer chain 305 is rotated by the driving motor 304 and thus the transfer die 306 is moved. The torch unit 50 is lifted by the lifting operation of the rod 308 of the impression cylinder 303, jumped over to the tip of the jig 6 ', and the torch unit 50 is welded once. Since the welding direction on the jig frame 6 can be performed in the reverse direction, the steel grating in which the welding inside the jig frame 6 is completed is taken out, and the steel grating 5 to be newly welded is replaced to be continuous. By repeating the normal welding operation in the forward and reverse directions, it is possible to shorten the time for the final product to be drawn out and replaced with the new welded object.

The surface welding torch 51 and the spot welding torch 41 are disposed on the torch fixing rod 33, and thus, the spot welding corresponding to one pitch and the surface welding can be completed simultaneously by the lowering action of one rotation.

As described above, according to the automatic welding apparatus for manufacturing steel grating according to the present invention, the first jig frame 6 and the second jig frame which can assemble the steel grating 5 are provided on the lower layer 8 of the single-floor work platform 10. (6 ') is installed in the straight direction, and the torch unit 50 which can carry out the welding operation by 1 pitch is installed thereon. In order to weld the steel grating 5 which is assembled inside the mold 6 ', the impression cylinder 303 and the transfer die 306 having the torch unit 50 installed on the upper layer 9 are operated twice. By transferring to the tip end of the jig frame 6 'and performing welding work in the reverse direction, the finished product in the jig 6 can be replaced with the steel grating 5 to be newly welded. Continuous welding work in forward and reverse direction A face welding torch 51 is disposed on each end of the diaphragm rod 33, and a spot welding torch 41 is disposed therebetween, and spot welding and face welding on the steel grating 5 are disposed therebetween. The torch fixing rod 33 can be carried out at the same time, and the trichastic stick guide 208 is installed downward at the lower end of the device 37 to which the torch fixing rod 33 is fitted laterally to the torch tip 202. It can settle on the exact welding position which should perform surface welding and spot welding, and there exists an effect which can carry out accurate welding.

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Claims (5)

In simultaneously performing surface welding and spot welding on the steel grating 5 assembled by the jig frame 6 and 6 'by the torch unit 50, On the lower floor 8 of the single-floor work platform 10, the jig 1 and the 2 jig 6 'for assembling the steel grating 5 are fixed by the cylinders 7 and 14 in the same direction. And the torch fixing rod 33 on which the surface welding torch 51 and the spot welding torch 41 are installed is connected to the lower end of the torch support arm 32 of the cross frame 17. It is fixed to the inward flange 35 'of the elevating rod 35 so as to elevate during welding by the operation of the elevating cylinder 20. The upper end is fixed to the surface of the die 106 for the body, and the lower part of the driving unit The torch unit 50 is welded by the ball screw bearing bracket 105 which is screwed into the ball screw 101 driven by the operation of the 100 and moved by one pitch according to the driving of the driving unit 100. Jig No. 2 after welding for grating in No. 1 jig (6) is completed while feeding 1 pitch in the direction (6 ') The transfer of the torch unit 50 beyond the tip portion is carried out by the lift cylinder 303 of the transfer die 306 installed on the upper layer 9 to lift the torch unit frame 301 to some extent. Automatic welding device for steel grating manufacturing, characterized in that The method of claim 1 The torch unit 50 is disposed on the torch fixing rod 33, and one surface welding torch 51 is disposed at each end of the torch fixing rod 33, and a spot welding torch 41 is disposed therein. Automatic welding device for manufacturing steel grating, characterized in that) is excreted with appropriate water The method of claim 2 At the lower end of the device 37 freely fitted to the torch fixing rod 33, a tricycle-shaped stick guide 208 is extended downward, and the device is free of the surface welding torch 51. Two stick guides 208 are fitted over the end bar 3 and the other stick guide 208 is laid over the eye bar 1, and also free of the spot welding torch 41. The furnace apparatus is characterized in that two stick guides 208 are fitted over the eye bar 1 and one over the twist bar 2 is arranged so as to be fitted over the twist bar 2. delete The method of claim 1 One side welding torch 51 is fixed to both ends of the torch fixing rod 33, and the inside of the spot welding torch 41 is fixed by an appropriate number, and the steel grating 5 is spot welded and surface welded. Automatic welding device for manufacturing steel grating, characterized in that can be carried out simultaneously

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