JPH0671441A - Fillet automatic welding equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To automate fillet welding of the joint between a horizontal member and a curved vertical member. [Structure] A work carriage 1 movable on a horizontal member H is provided with a pair of left and right copying support rollers 24 contacting both side surfaces of a vertical member V, and a vertical member V is provided at a rear portion of the copying support roller 24.
The profile positioning roller 26 that comes into contact with the inner side surface of the vertical member V is provided in the front portion, and the profile biasing roller (torch copying device 3 that comes into contact with the inner surface of the vertical member V is biased toward the vertical member V side).
Left and right copy rollers 53 also used) are provided, and the work trolley 1
Further, the welding torch 4 is provided via the torch copying apparatus 3 having the vertical copying roller 34 and the horizontal copying roller 53. [Effect] The work carriage is pivotally biased by the copying biasing roller about the copying support roller, and the copying positioning roller is grounded to the vertical member to keep the posture of the work carriage constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hull structure including a box-shaped structure, for example, a double hull block having many narrow joints in a hull, and a joint between a horizontal member and a vertical member,
In particular, the present invention relates to an automatic fillet welding apparatus capable of performing curved fillet welding that automatically performs fillet welding on a joint where a vertical member is continuous with straight lines and curved lines.

[0002]

2. Description of the Related Art Conventionally, a fillet welding length of a side frame member having a curvature in a hull structure is about 5000 mm even for a 70,000-ton class bulk carrier, and a straight joint is formed by a high efficiency welding method. Gravity welding of a certain gravity type was performed, and the welder performed fillet welding by semi-automatic carbon dioxide gas welding on the curved joint.

[0003]

However, there is a problem in that the proper use of various types of welding as described above requires a long welding time and a low production efficiency.

By the way, in the conventional fillet welding apparatus for performing fillet welding of a straight line portion, a welding torch is attached to a work carriage having guide rollers abutting the side faces of the vertical members at front and rear positions via a torch copying device. Installed, set the front guide roller among the guide rollers at a position close to the work carriage, run the work carriage in a direction slightly approaching the vertical member side, and run the work carriage along the vertical member. Was there.

Therefore, when this straight line automatic welding device is used for a curved joint, there is a problem that the traveling carriage is too far away from the vertical member or too close to it so that welding becomes impossible.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide an automatic fillet welding device capable of continuously applying straight lines and curved lines.

[0007]

In order to solve the above problems, an automatic fillet welding apparatus of the present invention is an automatic welding apparatus for fillet welding a joint between a horizontal member and a vertical member. A pair of left and right copying support rollers that come into contact with both side surfaces of the vertical member and a work positioning carriage that comes in contact with the inside surface of the vertical member that is arranged at the front or rear of the copying support roller on a work carriage that can move along the surface of A roller and a copying biasing roller that is arranged on the opposite side of the copying positioning roller and that is biased toward the vertical member and comes into contact with the inner surface of the vertical member are provided, and the work carriage is biased toward the horizontal member. A welding torch is provided via a torch copying device having a vertical copying roller that abuts and a horizontal copying roller that is biased to the vertical member side and abuts on the inner surface of the vertical member.

[0008]

In the above construction, in the work carriage, the copying urging roller is brought into contact with the inner surface of the vertical member, whereby the work carriage is urged to rotate about the copying support roller so that the copying positioning roller becomes the vertical member. Is held in a position to abut the inner surface of the. Therefore, even if the vertical member is curved along the moving direction of the work carriage, the distance from the vertical member to the work carriage is determined by the copy support rollers that abut on both side surfaces of the vertical member, and the copy positioning roller, The direction of the axle of the work carriage corresponding to the curvature of the vertical member, that is, the posture can be held constant and can travel smoothly along the vertical member, and the vertical and horizontal copying rollers of the torch copying device can accurately Since the welding torch is positioned, fillet welding can be automatically and stably performed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an automatic fillet welding apparatus according to the present invention will be described below with reference to the drawings. In this fillet automatic welding apparatus, a welding torch is mounted on a work carriage 1 which is movable on a horizontal member H and can travel along a vertical member V by a carriage copying device 2 via a torch copying device 3 arranged at the front. 4 are provided.

In the work carriage 1, magnet wheels 12 are arranged in front of the four corners of the carriage main body 11 and follow-up wheels 13 are arranged in the rear of the four corners respectively, and a traveling drive unit 14 is mounted on a shaft 12a of the magnet wheel 12. The shaft 12a of the magnet wheel 12 and the shaft 13a of the follower wheel 13 are interlockingly connected by a gear, and an interlocking mechanism 15 composed of a sprocket and a chain.

In the trolley copying device 2, a roller supporting member 23 is attached to a roller bracket 21 protruding from the right side of the center of the trolley body 11 via an adjusting screw 22 so that the roller supporting member 23 can be adjusted in vertical position. Vertical member V
A pair of left and right copying support rollers 24, which are in contact with both side surfaces of the vertical member V and whose distance can be adjusted, are rotatably attached to the tip portion located above the vertical member V about the vertical axis. Further, a roller support arm 25 is provided on the right side of the rear portion of the carriage main body 11, and the copy positioning roller 2 is in contact with the inner surface of the vertical member V at the tip of the roller support arm 25.
6 is rotatably supported around the vertical axis. Further, a copying biasing roller that is biased toward the vertical member V and abuts against the inner surface of the vertical member V is provided at the front portion of the carriage main body 11. In this welding device, a torch copying device 3 described later is provided.
Since the left and right copying rollers are also used, the description thereof is omitted here.

The torch copying device 3 is constructed by vertically arranging a vertical copying device 30 and a left and right copying device 31 in this order on the front part of the carriage main body 11. As shown in detail in FIGS. 4 and 5, the vertical copying apparatus 30 has a torch vertical adjustment section 33 arranged between the vertical elastic support sections 32 provided on the left and right sides of the front portion of the carriage body 11. The upper and lower copying rollers 34 are provided on the upper and lower elastic support portions 32, respectively.

That is, in the vertical elastic support portion 32, the vertical guide holes 35a are vertically formed through the vertical support blocks 35 projecting from the front portion of the carriage main body 11 on both left and right sides.
An elevating guide shaft 37 provided on an elevating and lowering moving frame (elevating and moving body) 36 is slidably penetrated through an elevating and lowering guide hole 35a through a slide bearing. Further, an up-and-down copying roller 34 is rotatably arranged around a horizontal axis center via a roller support plate 38 on the outer side of the up-and-down moving frame (up-and-down moving body) 36. A compression spring 39 interposed between the vertical moving frame 36 and the vertical moving frame 36 supports the weight of the torch copying device 3 to ground the vertical copying roller 34 to the horizontal member H at an appropriate pressure.

The torch up / down adjusting section 33 is provided with an up / down adjusting member 40 connected between the up / down moving frames 36.
A female screw hole 40a and guide holes on both sides of the female screw hole 40a are formed in the vertical direction. The vertical adjustment screw shaft 4 is rotatably supported by the elevation adjustment frame 41 and has an operating portion 42a at the upper end.
2 is screwed into the female screw hole 40a, and an up / down guide rod 4 vertically provided on the up / down adjustment frame 41.
3 (FIG. 1) is slidably fitted in the guide hole.

As shown in detail in FIGS. 3 and 5, the left-right copying device 31 is provided with a left-right elastic support portion 51 and a torch left-right adjustment portion 52, which are provided in the front portion of the elevation adjustment frame 41, in that order. The right and left copying rollers 53 are provided on the left and right elastic support portions 51, and the torch left and right adjusting portion 52 is provided.
Is provided with a welding torch 4.

The left and right elastic support portions 51 have a pair of upper and lower transverse guide holes 54a formed in the transverse support block 54 projecting from the front of the elevating and adjusting frame 41 so as to extend in the left and right direction. ) 55, a traverse guide shaft 56 is slidably passed through the traverse guide hole 54a through a slide bearing. Also,
A horizontal shaft 57 is projected through the lateral movement frame 55 on the left side surface of the lateral support block 54, and a pressing spring (urging member) 58 for biasing the lateral movement frame 55 to the right is externally fitted to the horizontal shaft 57. Has been done. Further, the traverse movement frame 55 has a roller support arm 59 extending rightward from the front surface.
A right and left copying roller (also used as a copying biasing roller) 53 that contacts the inner surface of the vertical member V is rotatably supported around the vertical axis at the tip of the roller support arm 59.

The torch left / right adjusting portion 52 is provided with a female screw hole 6 in a transverse adjusting member 61 attached to the transverse moving frame 55 via a base end portion of a roller supporting arm 59.
1a and a pair of upper and lower guide holes 61b are formed in the left-right direction, and the left-right adjustment screw shaft 63 having an operation portion 63a at the left end is rotatably supported by the transverse adjustment frame 62 and is screwed into the female screw hole 61a. , Transverse adjustment frame 6
The left and right guide rods 64 provided horizontally in 2 are slidably fitted in the guide holes 61b.

The welding torch 4 is attached to the transverse adjustment frame 62 via a torch attachment member 67 on a torch support arm 66 that descends from the front surface and extends to the right so that the welding direction can be adjusted.

Therefore, in the torch copying apparatus 3, the vertical distance from the horizontal member H to the welding torch 4 is set by the compression spring 39 of the vertical elastic support 32 so that the vertical weight of the torch copying apparatus 3 is supported by the vertical copying roller 34. It is grounded to the horizontal member H with an appropriate pressure, and its position is controlled by the vertical copying roller 34 via the elevation adjusting frame 41. Also,
The horizontal distance from the vertical member V to the welding torch 4 is urged by the pressing spring 58 of the left and right elastic supporting portion 51 to contact the left and right copying rollers 53 toward the vertical member V side, and the horizontal copying rollers 53 move laterally. The position is controlled via the frame 55. Further, when the object to be welded is changed, the torch up / down adjusting unit 33 and the torch left / right adjusting unit 52
The position of the welding torch 4 can be changed by operating the vertical adjusting screw shaft 42 and the horizontal adjusting screw shaft 63.

The left and right elastic support portions 51, which urge the left and right copying rollers 53 toward the vertical member V side by the pressing springs 58 and contact the same, as described above, are used for controlling the running posture of the work carriage 1. It is also used as a power roller.

That is, as shown in FIG. 6, from the distance L ₁ from the axle CL of the work carriage 1 to the inner contour support roller 24, from the axle CL of the work carriage 1 to the contour positioning roller 26, corresponding to straight running. The distance L ₂ is set to be slightly larger, and the axle CL of the work carriage 1 is configured to travel along the vertical member V in the direction of the arrow F while being inclined by θ≈3 ° with respect to the vertical member V.

Then, as shown by the phantom line, in the case of the vertical member V ₁ formed in the convex curved surface of the radius R ₁ or in the case of the vertical member V ₂ formed in the concave curved surface of the radius R ₂ , ,
By the left and right copying rollers 53 of the torch copying apparatus 3, the moment M about the copying support roller 24 is applied to the work carriage 1
Since the working, because it is always copying the positioning roller 26 is grounded to the inner surface of the vertical member V _1, V _2, by copying the support roller 24 with the distance L ₁ between the vertical member V _1, V ₂ are determined , The angle θ of the axle CL with respect to the vertical members V ₁ and V ₂ of the work carriage 1 is determined by the copying positioning roller 26, and the work carriage 1 corresponds to the grounding point of the copying support roller 24 and the grounding point of the copying positioning roller 26.
The posture of will be kept constant. Therefore, the work carriage 1 can be smoothly moved along the vertical members V ₁ and V ₂ without approaching or separating the work carriage 1 from the vertical members V ₁ and V ₂ or greatly tilting the axle CL. . Therefore, the work carriage 1 can be moved in a fixed posture along the curved vertical members V ₁ and V ₂ within the operating range of the torch copying apparatus 3, that is, the stroke range of the left and right copying rollers 53, and the welding torch 4 can be moved. Can be accurately controlled to automatically fillet weld the horizontal member H and the linear vertical member V to the curved vertical members V ₁ and V ₂ .

[0023]

As described above, according to the fillet automatic welding apparatus of the present invention, in the work carriage, the copying biasing roller is biased to come into contact with the inner surface of the vertical member, so that the copying support roller is supported. The work carriage is rotated and biased around the center, and the copy positioning roller is brought into contact with the inner surface of the vertical member, and the work carriage is brought into contact with the vertical point of the copy support roller and the vertical member of the copy biasing roller. It is held in a fixed posture corresponding to the contact point. Therefore, even if the vertical member is curved along the movement direction of the work carriage, the distance from the vertical member to the work carriage is determined by the copy support rollers that abut on both side surfaces of the vertical member, and the left and right copy rollers make copy positioning. By contacting the inner surface of the vertical member with the roller, the posture of the work carriage corresponding to the curvature of the vertical member is determined, and it is possible to smoothly run along the vertical member. Alternatively, even in the case of a joining portion that is continuous from a curved line to a straight line, the torch copying apparatus of the torch copying apparatus can accurately position the torch by the vertical copying roller and the horizontal copying roller, and the fillet welding can be automatically and stably performed.

[Brief description of drawings]

FIG. 1 is a plan partial sectional view showing an embodiment of an automatic fillet welding apparatus according to the present invention.

FIG. 2 is a left side view of the same fillet automatic welding apparatus.

FIG. 3 is a front partial cross-sectional view of the same fillet automatic welding apparatus.

FIG. 4 is a cross-sectional view taken along the line AA shown in FIG.

5 is a cross-sectional view taken along line BB shown in FIG.

FIG. 6 is a schematic plan view illustrating a traveling operation of the automatic fillet welding device.

[Explanation of symbols]

V, V ₁ , V ₂ Vertical member H Horizontal member 1 Work carriage 2 Car copying device 3 Torch copying device 4 Welding torch 11 Car body 12 Magnet wheel 13 Follower wheel 14 Travel drive device 21 Roller bracket 23 Roller support member 24 Copy support roller 25 Roller Support Arm 26 Copy Positioning Roller 30 Vertical Copying Device 31 Horizontal Copying Device 32 Vertical Elastic Supporting Part 33 Torch Vertical Adjusting Part 34 Vertical Copying Roller 36 Elevating Moving Frame 37 Elevating Guide Axis 39 Compression Spring 51 Horizontal Elastic Supporting 52 Torch Horizontal Adjustment Part 53 Left-right copy roller 55 Traverse movement frame 57 Horizontal axis 58 Pressing spring 59 Roller support arm 66 Torch support arm

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Koichi Ioku 5-3 28 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. No. 28 No. 28 Hitachi Shipbuilding Co., Ltd. (72) Inventor Shusuke Kinan 18-26 Ishigatsuji-cho, Tennoji-ku, Osaka City Osaka Prefecture Kinami Kiko Co., Ltd.

Claims (1)

[Claims] 1. In an automatic welding device for fillet-welding a joint between a horizontal member and a vertical member, a pair of left and right members abutting on both side surfaces of the vertical member on a work carriage movable along the surface of the horizontal member by traveling wheels. Of the copying support roller, a copying positioning roller arranged at the front or rear of the copying support roller and abutting the inner surface of the vertical member, and arranged on the opposite side of the copying positioning roller and urged to the vertical member side to be vertical. Providing a copy biasing roller that contacts the inner surface of the member,
Welding to the work carriage via a torch copying device having a vertical copying roller that is biased toward the horizontal member side and abuts, and a horizontal copying roller that is biased toward the vertical member side and abuts against the inner surface of the vertical member, via a torch copying device. Automatic fillet welding device with a torch.