JP2996596B2 - Suspended traveling automatic welding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspended traveling system in which a welding device is mounted on a traveling device to reciprocate, for example, in order to automatically perform a horizontal multi-layer welding of a seam joint portion of a bottom plate of a hull block. The present invention relates to an automatic welding device .

[0002]

2. Description of the Related Art In recent years, automatic welding of hull block structures has been dramatically advanced by introducing simple automatic welding machines and robots. However, most automation is simple plate joint welding or fillet welding, and at present the automation of multi-layer welding performed in various postures has hardly advanced. For example, in a hull block of a bulk carrier, as shown in FIGS. 4 and 5, a hull outer plate BP is welded to a hull outer plate SP via a bilge outer plate BS, and a stern is attached to an inner surface of the bilge outer plate BS. Material R in the direction and ship side bracket S in the side direction
B is attached. In this hull block, the welder W of the bottom shell seam joint between the bilge shell BS and the bottom shell BP is currently being installed by a welder using a semi-automatic carbon dioxide welding method, and automation has been delayed.

[0003]

The reason why automation is delayed in this bottom seam seam joint welding is that it is said that the welding posture is the most difficult among the welding construction methods, in addition to difficulty in ensuring groove accuracy. Being in a sideways position,
This is because an extremely large amount of time was required for preparing the erection and post-processing of the traveling device for moving the welding device in the lateral direction, and the welding time could not be reduced.

The present invention solves the above-mentioned problems, and can perform erection preparation and dismantling work in a short time, and can contribute to shortening of welding work time such as seam joint welding of a bottom bottom plate in a horizontal position.
It is an object of the present invention to provide a suspension traveling type automatic welding device .

[0005]

The present invention in order to solve the above problems SUMMARY OF THE INVENTION may freely travel frame running horizontally along one side of the erected steel sheet, the other side surface in the upper side of the steel plate
A plurality of drive rollers that are hung on a groove portion that is inclined downward and hung the traveling frame in a cantilever manner, a traveling drive device that rotationally drives these driving rollers, and a traveling frame that abuts one side surface of a steel plate A plurality of adjusting rollers capable of controlling the posture of the driving frame, the driving roller
Attached to the drive shaft protruding from the bearing, the flange on the bearing side
And a conical rolling surface extending from the flange portion, and a welding device that welds a welding portion along the traveling direction of the steel sheet to the traveling frame via a suspension mechanism that buffers vibration. It is provided.

[0006]

According to the above construction, the upper side of the standing steel plate is opened.
Engage the collar and the conical rolling part at the tip to lock the drive roller
By the traveling frame was having supported pieces, by adjusting the attitude of the traveling frame by the guide roller, the traveling frame
By attaching a welding device to the system via a suspension mechanism,
The automatic welding apparatus can be easily mounted and separated and dismantled in a short time. Further, the suspension mechanism can buffer vibration generated in the traveling frame or the welding device, so that the traveling performance and the welding performance are not reduced.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a suspension traveling type automatic welding apparatus according to the present invention. The same members as those in the related art are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 3, this suspension traveling type automatic welding apparatus includes, for example, a hull block, in which a welding joint W between a bilge outer plate BS and a hull outer plate (steel plate) BP constituting a ship side outer plate SP is formed on an outer surface. Multi-layer welding is performed from the side. This traveling device reciprocates along an upper side groove S for welding with an upper hull block on an upper side of a bottom shell BP formed in parallel with a welding joint W, and a row device shown in FIG. The welding is carried out by a welding device 17 suspended on the base plate.

As shown in FIGS. 1 to 3, a horizontal driving shaft 3 orthogonal to the traveling frame 1 has a pair of front and rear bearings 2 on a plate-shaped traveling frame 1 parallel to the bottom shell BP. Drive rollers 4 are rotatably arranged on the inner end of the drive shaft 3 and rotatably hung on the upper edge S of the bottom outer plate BP. A traveling drive device 5 that rotationally drives the drive rollers 4 includes a traveling drive motor 6 with a speed reducer disposed at the center of the traveling frame 1 and capable of adjusting the speed, and a drive attached to an output shaft of the traveling drive motor 6. A power transmission member including a timing pulley 7 and a timing belt 9 wound between timing pulleys 8 fixed to outer ends of both drive shafts 3, and a tension pulley 10 for applying tension to the timing belt 9 are provided. Then, the drive roller 4 can be rotated forward and reverse at an arbitrary speed by the drive motor 6.

The welding groove portion S formed on the upper side of the bottom outer plate BP is formed so that the inner surface side is inclined downward at about 20 degrees so as to weld and join the upper hull block from the inside. Have been. The drive roller 4 has a flange 4a formed on the bearing side, a conical rolling surface 4b formed at an angle of 20 degrees from the flange 4a, and a welding groove S for welding.
And the traveling frame 1 can be hung in a cantilever manner.

At the front and rear positions of the traveling frame 1, there are provided a side roller 12 and a guide roller 13 which protrude inward through an opening 11 at an upper portion and a lower portion and roll on the outer surface of the bottom plate BP. Is provided with an adjusting tool 14 capable of adjusting the amount of withdrawal.

A hanger 16 is suspended via a suspension mechanism 15 from a support portion 1a bent in an L-shape at the lower portion of the traveling frame 1, and a welding device 17 is provided on the hanger 16. The hanging mechanism 15 has a hanger 16 at its lower end.
The pair of front and rear shafts 18 with the attached
And a coil spring 20 is interposed between the support portion 1a and the locking plate 19 at the upper end of the shaft 18 by being externally fitted, and a cushioning rubber 21 is provided on the bottom surface of the support portion 1a.
The suspension mechanism 15 is configured to buffer the vibration and impact generated by the suspension mechanism 15 so that the vibration generated in the traveling frame 1 or the welding device 17 is directly transmitted to the other party so as not to impair the traveling performance and the welding performance. Have been. Further, the buffering force of the suspension mechanism 15 can be adjusted according to the welding device 17.

The welding device 17 includes, for example, a hanger 1
6 having a steadying roller 34 which is hung on 6
1 is provided with an elevating frame 33 whose vertical position can be adjusted via an expansion / contraction adjusting tool 32, and the elevating frame 33 is attached to the adjusting frame 3 via an up / down fine adjustment mechanism 35 using a screw shaft.
6 are provided. Then, the torch copying apparatus 3 including a left and right fine adjustment mechanism 37 using a screw shaft on the adjustment frame 36 and a copying roller 38 that comes into contact with the outer surface of the bottom plate BP.
9, a welding torch 40 is provided.

The welding operation in the above configuration will be described. The traveling frame 1 is suspended by a crane or the like, and a driving roller 4 is attached to the upper edge groove S of the bottom plate BP of the bilge plate BS.
And the traveling frame 1 is cantilevered on the bottom shell BP. Then, after adjusting the amount of retraction of the side roller 12 by the adjusting tool 14, the welding device 17 is suspended by a crane or the like and mounted on the traveling frame 1 (the traveling frame 1 and the welding device 17 are integrated before mounting). May be attached to the bottom shell BP). Furthermore, expansion and contraction adjustment tool 32
, The vertical position of the welding device 17 is adjusted, and the position of the welding torch 40 is made to correspond to the joint W by the fine vertical adjusting mechanism 35 and the fine horizontal adjusting mechanism 37. Then, the welding is started by the welding torch 40, and the driving roller 4 is driven by the traveling driving device 6 to move the traveling frame 1 along the upper side groove S of the bottom outer plate BP, and is operated by the torch copying device 39. The welding joint W is welded by the welding torch 40 to be performed. Although not shown, the traveling frame 1 is provided with a forward / backward limit switch, and a striker acting on the limit switch is provided at the forward and backward limits of the bottom plate BP.
The traveling frame 1 can be automatically reciprocated traveling,
By adjusting the welding torch 40, multilayer overlay welding can be performed.

After the welding is completed, the welding device 17 is separated from the traveling frame 1 and carried out. After that, the traveling frame 1 is lifted, the drive roller 4 is removed from the upper edge groove S of the bottom outer plate BP, and the traveling frame 1 is detached. What is necessary is just to separate from the outer plate BP.

According to the above configuration, the traveling frame 1 is movably suspended on the upper edge groove portion S of the ship bottom outer plate BP via the driving roller, so that the preparation for the installation of the traveling frame 1 and the post-processing work are facilitated. In addition, it can be performed in a short time, and the welding time for seam joint welding of the bottom outer plate in the horizontal position can be greatly reduced.

In the above embodiment, the traveling device is provided with the welding device 17 provided with the torch copying device 39. However, a welding robot that holds the welding torch via an articulated arm may be used.

[0017]

As described above, according to the first aspect of the present invention , the drive roller is provided at the groove on the upper side of the standing steel plate.
The traveling frame is hung on a steel plate stably in a cantilever manner so that it can travel freely, and the posture of the traveling frame is adjusted by guide rollers. Since the welding device is mounted via the suspension mechanism, the traveling device can be easily installed and separated and dismantled in a short time, and the overall welding time required for the welding operation can be greatly reduced. Even if the posture is related to horizontal welding, the welding operation can be automated. In addition, the suspension mechanism can prevent vibrations generated in the traveling frame from being transmitted to the welding device and can also prevent vibrations generated in the welding device from being transmitted to the traveling frame. In addition, the traveling performance of the traveling frame and the welding performance of the welding device are not reduced.

According to the second aspect of the present invention, the lifting machine
A shaft that is installed in
The coil spring, which is externally fitted to the
Effective for the vibration generated in each of the row frame and welding equipment
Can be absorbed and buffered.

According to the third aspect of the present invention, the suspension is provided.
The mechanism uses a coil spring that is externally fitted to a pair of front and rear shafts.
Since it is interposed between the locking plate and the support part to compress and buffer,
Stable cushioning is possible, and each of the traveling frame and welding equipment
The vibrations that occur are absorbed more effectively , buffered and stabilized
Can travel.

[0020]

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a suspension traveling type automatic welding apparatus according to the present invention.

FIG. 2 is a side view showing the automatic welding device .

FIG. 3 is an enlarged cross-sectional view of the upper and lower portions of a bottom shell plate using the automatic welding device .

FIG. 4 is a perspective view showing a hull block of a conventional bulk carrier.

FIG. 5 is a front view showing the hull block.

[Explanation of symbols]

SP Ship side outer plate BS Bilge outer plate BP Ship bottom outer plate (steel plate) S Upper side groove (Upper side) W Weld joint 1 Running frame 1a Support 3 Drive shaft 4 Drive roller 4a Flange 4b Conical rolling surface 5 Running drive Apparatus 6 Traveling drive motor 11 Opening 12 Side roller (adjustment roller) 13 Guide roller 14 Adjuster 15 Hanging mechanism 16 Hanger 17 Welding device 18 Shaft 19 Locking plate 20 Coil spring 39 Torch copying device 40 Welding torch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-77958 (JP, A) JP-A-58-32580 (JP, A) Fully open 1986-4877 (JP, U) Really open 157286 (JP, U) JP-A 59-128486 (JP, U) JP-B 53-15265 (JP, B2) JP-B 53-17095 (JP, B2) JP-B 59-14052 (JP, Y2) 44-5957 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B23K 9/00 B23K 9/02 B23K 9/12 B23K 37/02

Claims (3)

(57) [Claims] 1. A running frame that can run horizontally in one direction along one side surface of a steel plate that is erected, and that is hung on a groove that is inclined downward at the upper side of the steel plate on the other side surface to cantilever the running frame. a plurality of drive rollers Jisuru hanging on Jo, a traveling drive device for rotating these drive rollers, and a contact more capable of controlling the attitude of the traveling frame of the adjustment roller on one side of the steel sheet is provided, said drive roller Is projected from the bearing of the traveling frame
And the flange on the bearing side
Is formed and al spread conical rolling surface, the traveling frame, suspension, characterized in that a welding device for welding the weld through a lifting mechanism to buffer the vibration along the running direction of the steel sheet Traveling automatic welding equipment. 2. The suspension mechanism according to claim 1, further comprising: a shaft for guiding the lifting and lowering, and a coil spring externally fitted to the shaft for damping the vertical movement. The hanging traveling type automatic welding apparatus according to claim 1, wherein the automatic welding apparatus is configured to perform the following. 3. A suspension mechanism comprising: a pair of front and rear shafts mounted on a hanger provided in a welding device; a support portion of a traveling frame through which the shafts are vertically movable; The suspension traveling type automatic welding device according to claim 1, further comprising a coil spring interposed between a locking plate and the support portion.