JPH0360867A - Horizontal fillet welding equipment - Google Patents

Abstract

PURPOSE:To smooth the direction change of a truck at a corner part and to surely perform horizontal fillet welding by making each guide wheel which is brought into contact with vertical plates to guide the truck a driving system. CONSTITUTION:When the truck 1 approaches a vertical plate 22b in front, a touch sensor 36 comes into contact with the vertical plate 22b and detects that the truck 1 reaches a direction change part and a rod 14a of an extruding cylinder 14 is contracted. The direction of the truck 1 is changed gradually in the left from a point of time when a lock of a driven wheel 10 is released and a first guide wheel 16 comes into contact with the vertical plate 22b. When a second guide wheel 17 separates from a vertical plate 22a, a direction-change detection sensor 37 separates from the vertical plate 22a and a motor 6 is reversed and a left side travel driving wheel 8 is reversed and the direction of the truck 1 is changed smoothly. A welding torch 33 is provided with extrusion force sidewards at all times by force of a spring 30 and the state corresponding to a weld zone is held by control of an arc sensor and welding of the corner part can be performed continuously without intermission.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a horizontal fillet welding device used for continuous frame welding in one round during the construction of ships and bridges.

[Prior Art] When constructing a ship or a bridge, frame welding is performed, such as fillet welding horizontal plates and vertical plates to form a frame. As a conventional welding method for fillet welding, for example, there is a method using a horizontal fillet welding device as shown in FIG. That is, a conventional horizontal fillet welding device has a moving block b mounted on a truck a so as to be movable in the front and back direction, and a welding torch C is equipped on the moving block b. In addition to the travel drive wheel d, a copying lever e is provided at the bottom, and a welding torch C is installed.
A guide wheel f is extended and supported at the front and back positions of the side, and a stop limit switch q is provided at the front end of the cart a, and a control device is provided at the top. When welding i and vertical plate j by frame, truck a is placed in a part of the corner formed by vertical plates j and j on different sides, and guide wheel f is aligned parallel to the direction in which truck a moves. standing board j
The welding torch C is set in advance in a position that is close to the rear side of the truck a so that it corresponds to the fillet welding part, and while the truck a is traveling in the direction of the arrow, the welding torch C is used to weld the fillet. The welded part is traced and welded, and when the bogie a comes into contact with the standing plate located forward in the direction of travel, the stop limit switch q is activated, and the bogie a is stopped based on the command from the controller.
At the same time as the welding torch C is stopped, the welding torch C is moved to the front end side as shown by the two-dot chain line, thereby performing fillet welding over almost the entire length of the vertical plate j.

[Problems to be Solved by the Invention] However, in the case of the above-mentioned conventional horizontal fillet welding device, since the cart a stops when it comes into contact with a standing plate located forward in the direction of travel, it is difficult to solve the problem when welding work in one direction is completed. However, it is not possible to continue welding in a different direction unless the operator changes the direction of the entire device, making it impossible to weld continuously around a horizontal plane, and leaving unwelded parts at corners. There was a problem that occurred. In addition, since the guide wheel f that is brought into contact with the upright plate j is not driven, if the upright plate j has a curved shape, it cannot follow the curved shape and is likely to cause knocking.

Therefore, the present invention aims to enable fillet welding to be performed continuously around the horizontal plane in frame welding between the horizontal plate and the vertical plate.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a bogie having two running drive wheels at the rear and a driven wheel at the front. A welding torch is provided to allow access to and from the truck, and a first guide wheel is attached to the front of the truck, and a second guide wheel and a third guide wheel are installed horizontally at two locations on one side of the truck, front and rear, respectively. The extension of the straight line connecting the second guide wheel and the third guide wheel intersects with the front extension of the straight line in the running direction of the bogie, and the three guide wheels are connected to a drive source via a power transmission device. The configuration is as follows.

[Function] When the bogie is run with the second guide wheel and the third guide wheel in contact with the upright plate, the direction of the running drive wheel is slightly inclined toward the second guide wheel, so the bogie will not move upright. It is made to run following the board. Further, since each guide wheel is driven by a single drive system, when the cart approaches a part of the corner of the standing board and the first guide wheel comes into contact with the standing board in front, the direction of the cart is smoothly changed. At this time, since the welding torch is always pushed out to the side, there is no chance of leaving any part of the corner unwelded. Therefore, in frame welding, fillet welding can be performed continuously around the horizontal plane.

[Implementation Example 1] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the horizontal fillet welding apparatus of the present invention, which includes a horizontal plate 38 and four vertical plates 22a.

22b, 22c, and 22d are frame welded, an example will be shown in which the fillet welding can be performed continuously one round counterclockwise.

Traveling drive wheels 8 and 9 are disposed at the left and right positions of the rear portion R of the truck 1 and receive driving force from a motor 6.7 as a drive source via power transmission mechanisms 4 and 5 each consisting of a clutch 2.3 and a bevel gear. At the same time, a driven wheel 10 is provided at the center position of the front part F of the bogie 1 so as to be freely pivotable in the horizontal direction,
The above-mentioned bogie 1 is made to run by grounding at three points, the driving wheels 8, 9 at the rear R and the driven wheels 10 at the front F.

The driven wheel 10 can be turned around the pivot shaft 12 by having the truck 1 support the pivot shaft 12 provided on the wheel frame 11 supporting the driven wheel 10. By pressing the tip of the rod 14a of the pressing cylinder 14 against one side of the extended arm 13, extending the pressing cylinder 14, and pressing the arm 13 against the stopper 15 attached to the truck 1. The driven wheel 10 is locked so that it is positioned parallel to the driving wheels 8 and 9, while the pressing cylinder 14 is shortened and the rod 14a is moved backward to release the pressing of the arm 13 against the stopper 15. The driven wheel 10 is unlocked and becomes free to rotate around the pivot shaft 12, allowing it to function as a swivel caster.

In addition, in order to change the direction of the truck 1 to the left when it reaches a part of the corner formed between adjacent standing boards,
A part of the front right corner is set back to the rear, that is, the right shoulder is dropped, and the first guide wheel 16 is placed in the center of the front F on the truck 1, and the first guide wheel 16 is placed on one side of the truck 1. The shaft 1 has a second guide wheel 17 on the front side of the S, and a third guide wheel 18 on a part of the rear corner of the - side S, arranged vertically.
9.20.21, and as schematically shown in FIG. 2, the extension of the straight line A connecting the second guide wheel 17 and the third guide wheel 18 is
In order to intersect with the straight line B1 extending in the front-rear direction through the center of
The third guide wheel 18 is attached so that its position slightly extends to the side, and when the trolley 1 is driven to travel, the second guide wheel 17 and the third guide wheel 18 are pressed against the standing plate 22a, etc. The cart 1 can be made to travel along the upright plate 22a etc. by making contact with the stand plate 22a and the like.

Furthermore, the shaft 19.20 of each guide wheel 16.17.18
．． 21 is provided with pulleys 23, 24, 25, respectively, and a timing belt 26 is provided on each of the pulleys 23, 24, 25.
A tension pulley 27 for rotating and applying a required tension to the timing belt 26 is provided between the pulleys 24 and 25 so as to be in contact with the timing belt 26, and a motor for driving the running drive wheel 9 is provided. The power transmission mechanism 5 of 7 is provided with a pulley 28 for receiving the driving force from the motor 7 via transmission gears 39 and 40,
A transmission belt 29 is passed between the pulley 28 and the pulley 25 on the shaft 21 of the third guide wheel 18, and the pulleys 19, 20, 21, the timing belt 26, and the pulley 2
8. The transmission belt 29 and transmission gears 39 and 40 constitute a power transmission device, and the driving force of the motor 7 is transferred from the power transmission mechanism 5 to the transmission gears 39 and 40 that constitute the power transmission device.
, pulley 28, and transmission belt 29 to the pulley 25, and the rotation of the pulley 25 is transmitted to the pulleys 23, 24 via the timing belt 26, so that each guide wheel 1
6.17.18 can be driven in synchronization with the running of the trolley 1.

Further, a spring 30 is installed at the intermediate portion of the truck 1 in the front and back direction.
An extrusion shaft 31 is arranged so as to always apply an extrusion force to the right (toward the side where the guide wheels 17 and 18 are installed) and is oriented in the left-right direction. The welding torch 33 is supported through the welding torch 33 so that the welding torch 33 can be pushed out to the right or pulled to the left through the extrusion shaft 31, and a support member 34 is provided above the welding torch 33. Through the extrusion shaft 31
A touch roller 35 supported by the welding section is disposed to prevent the welding torch 33 from coming too close to the welding section when the trolley 1 travels along the track, thereby maintaining a constant distance between the welding torch 33 and the welded section. Let them do it.

Furthermore, at the front end of the above-mentioned trolley 1, a first
The rod 1 of the extrusion cylinder 14 detects that the guide wheel 16 has come into contact with the standing plate 22b located in front of the truck 1.
A touch sensor 36 is provided which allows the first guide wheel 16 to extend and retract, and when the first guide wheel 16 contacts the standing plate 22b, the driven wheel 10 is set in a free turning state so that the running direction of the trolley 1 can be smoothly changed. On the other hand, in front of the third guide wheel 18 of the truck 1, there is a direction change detection sensor 37 which is activated when the truck 1 separates from the standing plate 22a and reverses the motor 6 when the truck 1 starts to change direction. established,
By reversing the left travel drive wheel 8, the direction of the truck 1 can be easily changed with a small turning radius.

When assembling a frame by fillet welding the horizontal plate 38 and the vertical plates 228 to 22d on the four sides, first, as shown in FIG. 1 on the horizontal plate 38, and the second guide wheel 17 and the third
The guide wheel 18 is brought into contact with the standing plate 22a, and the direction change detection sensor 37 is brought into contact with the standing plate 22a. At this time, since the welding torch 33 is given a rightward extrusion force through the extrusion shaft 31 by the force of the spring 30, the welding torch 33 is moved between the vertical plate 22a and the horizontal plate through contact between the touch roller 35 and the vertical plate 22a. It is set so as to be opposed to the fillet welded portion with 38 at a predetermined interval. In this state, when the motor 6.7 is driven to rotate the driving wheels 8.9 to make the cart 1 travel, and at the same time start welding with the welding torch 33, the orientation of the driving wheels 8 and 9 is changed. Since the truck 1 is slightly inclined toward the second guide wheel 17 side, the cart 1 is driven while being pressed against the vertical plate 22a, and the welding torch 33 is used to connect the vertical plate 22a and the horizontal plate 38.
Copy welding of fillet welds is performed.

When the welding work between the vertical plate 22a and the horizontal plate 38 is nearing completion and the truck 1 approaches the vertical plate 22b in front as shown in FIG. , it is detected that the trolley 1 has arrived at the direction changing section, and the touch sensor 36
The rod 14a of the extrusion cylinder 14 is contracted based on the command. When the rod 14a of the extrusion cylinder 14 is contracted, the driven wheel 10 is unlocked, so that the driven wheel 10 can freely turn around the pin 12 like a swivel caster, and the direction of the truck 1 can be changed. It becomes easy. At this time, each guide wheel 1B, 17.18 is
The driving force taken out from the power transmission mechanism 5 of the motor 7 is applied to the pulley 25 via the transmission gears 39, 40, the pulley 28, and the transmission belt 29, and is applied from the pulley 25 to the pulleys 23, 24 via the timing belt 26. Since the first guide wheel 16 is driven synchronously by
The cart 1 is gradually turned to the left from the point when it touches the front standing plate 22b, and as shown in FIG.
When the guide wheel 17 separates from the vertical plate 22a, the direction change detection sensor 37 separates from the vertical plate 22a, and the signal at that time causes the motor 6 to reverse and the left travel drive wheel 8 to reverse. The direction is smoothly changed from the state shown in FIG. 4 to the state shown in FIG. 5, and from the state shown in FIG. 5 to the state shown in FIG. Also, during this direction change, the trolley 1
As shown in the drawings and FIG. 5, the welding torch 33 is in a state away from a part of the corner formed by the standing plates 22a and 22b, but the welding torch 33 is always given a sideward pushing force by the force of the spring 30. At the same time, by controlling the arc sensor, the welding torch 33 can always be kept in a state corresponding to the welding part. Therefore, the standing board 22a
Welding of a part of the corner from 22b to 22b can also be performed continuously without interruption.

When the direction of the truck 1 is changed as shown in FIG. 6, since the touch sensor 36 has already moved away from the vertical plate 22b, the rod 14a of the extrusion cylinder 14 is extended to lock the driven wheel 10 again. state, and the trolley 1 is placed on the standing board 22.
As in the case of welding a, the second guide wheel 17 and the third guide wheel 18 are made to trace and travel while in contact with the vertical plate 22b to perform fillet welding on the vertical plate 22b, and thereafter, in the same way, the direction By performing the conversion and tracing, the horizontal plate 38 and the vertical plates 22a, 22b, 22c, and 22d are fillet welded continuously around the horizontal plane.

In the above, the driving wheels 8 and 9 are inclined toward the second guide wheel 17, and each guide wheel 1B, 1
7.18 is driven by a power transmission device consisting of transmission bells 1 to 29, timing belt 26, etc., so even if the vertical plates 228 to 22d have a curved shape, the truck 1 will cause knocking. You can run by following the shape without any trouble.

In addition, in the above embodiment, an example of the configuration was shown in which fillet welding can be performed on the trolley 1 in one continuous rotation counterclockwise, but fillet welding can be performed in one continuous rotation clockwise. In order to achieve this, it is sufficient to use the configuration with the left and right sides opposite to each other as shown in FIG. It goes without saying that other mechanisms may be employed and that various changes may be made without departing from the gist of the invention.

[Effects of the Invention] As described above, according to the horizontal fillet welding device of the present invention, each guide wheel that guides the cart by contacting the vertical plate is driven, so that corner alignment between the vertical plates can be avoided. Since the welding torch is designed to apply a force to push the welding torch to the side, it is possible to smoothly change the direction of the cart at the corner. Therefore, frame welding between the horizontal plate and the vertical plate can be performed continuously in one round in the horizontal plane, and even if the vertical plate has a curved shape, it can be smoothly traced and horizontal fillet welding can be performed reliably. It has an excellent effect of being able to do the following.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view showing an overview of an embodiment of the horizontal fillet welding device of the present invention, FIG. 2 is a schematic view showing the relationship between the running direction of the truck and the mounting position of the guide wheel, and FIG. Figures to 6th
Each figure is a schematic plan view showing an operating state, and FIG. 7 is a schematic perspective view showing an example of a conventional device. 1... Trolley, 4.5... Power transmission mechanism, 6,7...
・Motor (drive source), 8.9... Traveling drive wheel, 10.
... Driven wheel, 16... First guide wheel, 17... Second
Guide wheel, 18...Third guide wheel, 23.24.25
...Pulley (power transmission device) 26...Timing belt (power transmission device), 28...Pulley (power transmission device), 29...Transmission belt (power transmission device), 30.
... Spring, 31 ... Extrusion shaft, 33 ... Welding torch, 39.40 ... Transmission gear (power transmission device), A
... Straight line connecting the second guide wheel and the third guide wheel, B.
... Straight line in the running direction of the cart, F... Front of the cart, R...
- Rear part of the trolley, S... One side of the trolley.

Claims (1)

[Claims] (1) A bogie that has two driving wheels at the rear and a driven wheel at the front is equipped with a welding torch so that it can move in and out in one direction in the running direction, and a welding torch is attached to the front of the bogie. A second guide wheel and a third guide wheel are respectively installed in a horizontal state at the front and rear of one side of the truck, and an extension line of a straight line connecting the second guide wheel and the third guide wheel is formed. A horizontal fillet welding device, characterized in that the horizontal fillet welding device intersects with a forward extension line of a straight line in the running direction of the truck, and the three guide wheels are connected to a drive source via a power transmission device.