JPS6096396A - Self-traveling carriage for welding - Google Patents

Abstract

PURPOSE:To provide a titled carriage which performs automatic profiling welding of horizontal fillet welds having straight and curved parts by the constitution in which two profiling wheels and pressing means are provided and the carriage is profiled along the side face of a vertical plate member in-between by said wheels and means and an intermediate wheel supporting a welding rod holder. CONSTITUTION:Two profiling wheels 5 which roll on the outside flank of a vertical plate member 2 and an intermediate wheel 8 which is provided at the intermediate of said wheels and is pressed to the inside flank of the member 2 by a coil spring 10 via a supporting rod 9 are provided to a carriage base plate 4. The carriage base plate 4 supported by supporting wheels 13 is driven by a motor 7 to travel on the top edge of the member 2 along the side face thereof. A torch holder 11 is connected via a sliding block 25 to said wheel 8 and the distance between the welding torch 12 supported to the holder 11 and the wheel 8 is maintained always constant. The carriage 4 is controlled to profile always the member 2 by such constitution and the specified distance between the torch 12 and the weld line 3 is maintained irrespectively of the curvature of the member 2.

Description

[Detailed description of the invention] [Industrial application field] In the present invention, a vertical plate member is directly clamped by a traveling axle.

The present invention relates to a self-propelled welding cart that performs horizontal fillet or diamond-shaped groove welding of vertical plate members that are curved.

[Prior art]

Welding work for ship hulls or bridges includes welding flange materials to manhole holes, pipe insertion holes, etc. For example, as shown in FIG. 1, since the flange material 2 has a curved portion, it is difficult to apply an automatic welding machine, and currently the flange material 2 is welded to the lower plate member 1 by manual welding. 2 is a flange material, that is, a vertical plate member, and 3 is a weld line for horizontal fillet welding. Generally, the height of the vertical plate member 2 is approximately 100 mm.
mm, and the radius of curvature is often about 200 mm.

There are several possible shapes of self-propelled carts that perform such horizontal fillet welding. For example, a self-propelled trolley can be considered that is equipped with a pair of tracing rollers on the welding line 3 side, carries a welding 1 hech, and travels on the lower plate member 1 or the vertical plate member 2. When the lower plate member 1 travels, it is not possible to follow either the curved portion or the straight portion.

In addition, when the vertical plate member 2 is running, it is difficult to use a cart because the height of the vertical plate member 2 is low, and in both cases, the welding line must be placed below the copying roller or the traveling axle. The aim is direct.

It is difficult to secure a place for welding the curved portion, although the difference will be in the curved portion.

Next, a self-propelled trolley that runs while holding the vertical plate member 2 between rollers has been put into practical use, but this is a vehicle that runs by holding the vertical plate member 2 between two pairs of opposing wheels, and the continuous running of two straight curves is as if it were Although it seems possible, if the radius of curvature becomes small, stable running becomes impossible, and since the welding torch is mounted at the front or rear of the cart, if the welding target has a different curvature, the welding torch Currently, it is not possible to perform fully automatic copy welding because the target position of the weld line deviates from the weld line.

[Purpose of the invention]

The present invention provides a self-propelled welding cart for fully automatic copy welding of horizontal fillet welds of vertical plate members having continuous straight and curved parts, or of relatively small-diameter pipe materials. The purpose is to provide.

[Summary of the invention]

In order to achieve the above object, the present invention has a configuration in which the truck follows the side surface of the vertical plate member using two axles and one axle. That is, two wheels are placed on one side (for example, on the outside surface side) of the inside of the vertical plate member, and one axle is placed on the other side (on the inside surface side) approximately in the middle of the two axles. Assuming that at least one of these three axles can move forward and backward with respect to the vertical plate member and is pressed against the vertical plate member by a pressure means such as a spring, the three axles are used to move the vertical plate member. Sandwich the parts. The support of the truck in the direction of gravity is achieved by an axle abutting against the upper surface of the vertical plate member or an axle axle abutting against the lower plate member.

To explain an example with reference to the drawings, as shown in FIG.
An intermediate axle 8 is provided which is pressed against the inner side of the vertical plate member 2 with a repulsive force of 0. In this example, the rotational force of the motor 7 is transmitted to the copying axle 5 by the chain 6. The intermediate axle 5 is supported by a support rod 9 so as to be movable forward and backward relative to the vertical plate member 2, and is pressed against the vertical plate member 2 by the repulsive force of a compression coil spring 10 serving as a suppressing means. The welding torch 12 is coupled to the intermediate axle 8 via the torch holder 11 and the coupling means, and is connected to the intermediate wheel 8.
advance and retreat in the same way as the advance and retreat of.

According to this, the trolley 4 always follows the vertical plate member 2, the intermediate axle 8 always comes into contact with the vertical plate member 2, regardless of the curvature of the vertical plate member 4, and the distance between its surface and the weld line 3 is always constant. Since the welding torch 12 is connected to the pressure wheel 8, the distance between the welding torch 12 and the welding line 3 is always constant.

In addition, it is assumed that two copying axles 5 or one of the two copying wheels among the three wheels 5 and 8 are used as pressure wheels, and the intermediate axle 8 does not move relative to the trolley 4. Good too. For example, the intermediate axle 8 and one copying axle 5 are rotationally driven by the motor 7.

The other axle 5 may be made movable toward and away from the vertical plate member 2, and may be pushed by a suppressing member.

That is, at least one of the three axles 5 and 8 may be used as a pressurizing axle that can advance and retreat with respect to the vertical plate member 2, and this may be pressed against the vertical plate member by a pressing member.

The drive of the axles, that is, the tracing drive of the truck, is not performed by the axles 5 and 8, but by the wheels or supports that support the truck 4 in the direction of gravity by contacting the upper surface of the vertical plate member 2 or by contacting the lower plate member. It may also be configured to be rotationally driven by power.

Furthermore, instead of connecting the welding rod holder to the intermediate wheel with a connecting member, another copying wheel @ (holder copying axle) is arranged on the outer side of the vertical plate member 2 and this is used as the holder support means. The holder support means can move forward and backward relative to the vertical plate member, and the holder copy axle is pressed against the vertical plate member using a suppressing member (outward copy suppressing means) such as a coil spring. It may be made to imitate the member. In this case, the holder support member follows the outer surface (welding a) of the vertical plate member, and even if the thickness of the vertical plate portion is uneven, accurate welding can be performed.

〔Example〕

FIG. 3 shows a front view of the first embodiment of the present invention, and FIG. 4 shows a side view.

In this embodiment, wheels 5 are pivotally supported on a truck base 4,
These wheels 5 are rotationally driven by a motor 7 via a chain 6. The copying axle 5 faces the outer surface of the vertical plate member 2. The intermediate axle 8 is pivotally attached to one end of the support rod 9 and faces the inner surface of the vertical plate member 2 . The support rod 9 is held by the base 4 and guided so as to be movable forward and backward relative to the inner surface of the vertical plate member 2. A compression coil spring 1o constantly applies force to this support rod 9 in the direction toward the vertical plate member 2.

Reference numeral 13 denotes support wheels (two at the front and the front), which are pivotally attached to the trolley base 4 and come into contact with the upper surface of the vertical plate member 2 to support the load of the base 4.

The welding torch 12 is held by a torch 7-holder 11 fixed to a sliding shaft 15 that is guided by a vertical sliding bearing 14 and can move up and down. Casters 16 are provided at the bottom of the sliding shaft 15. The axle (vertical tracing axle) of the caster 16 comes into contact with the surface of the lower plate member 1 and supports the load of the sliding shaft 15 and the mechanical elements coupled thereto.

The sliding shaft 15 is equipped with a sliding amount regulating mechanism, and the lowering limit is adjusted and set by a stopper 17 and a child 18 of this sliding amount regulating mechanism.

The sliding bearing 14 is supported by a bracket 22, and the guide shaft 19. An adjusting knob 20 and a feed screw 21 are fitted, by means of which the sliding bearing 14 can aim and set the welding torch 12 towards the welding line 3. The bracket 22 is supported by a support shaft 23 so as to be rotatable above the tip of the welding torch, and serves as a mechanism for setting the forward and backward angles of the welding torch 12.

The support shaft 23 is fixed to a sliding block 25, and a support block 24 to which the intermediate wheel support rod 9 is fixed is fixed to the sliding block 25.

The sliding block 25 can be slidably adjusted in the left and right directions as shown in FIG.
By tightening the block 2 with this handle 26,
4 and 25 are integrally fixed. By loosening the handle 26, the relative position of the blocks 24 and 25 can be adjusted. With the handle 26 tightened, the blocks 24 and 25 move in conjunction with the tracing movement (left and right direction) of the intermediate wheel 8 relative to the vertical plate member 2, and the welding torch 12 moves in the same way.

Note that the pressure on the intermediate wheel 8 can be released by rotating the lever 28 in a direction perpendicular to the plane of the paper (clockwise in FIG. This is done by winding the rope 27 around the drum 29. When the rope 27 is wound in, the block 24 is pulled to the left in FIG. 3, and the intermediate ring 8 is retracted from the vertical plate member 2. With the rope 27 wrapped around the drum 29, the locking claw 31 (fourth
In this figure, the handle 28 is locked to perform a pressure release lock. Reference numeral 32 denotes a handle fixed to the trolley base, which is grasped to carry the trolley.

When using the truck of the second embodiment, the support axle 13 is brought into contact with the upper surface of the vertical plate member 2 while the handle 28 is locked with the locking pawl 31. Next, the locking pawl 31 is removed, the intermediate wheel 8 is applied with a pressing force by the coil spring 10, the handle 26 is loosened, and the block 25 is moved against the block 24.
The adjusting heir 20 is turned while adjusting the relative position of the weld 1-1 12, and the target position of the weld 1-1 12 is set at the weld line 3, and the handle 26 is tightened. Next, a lifting limit is set for the eldest child 18.

As described above, the copying wheels 5 and the intermediate wheels 8 tightly sandwich the vertical plate member 2, and the upper and lower copying wheels of the casters 16 come into contact with one surface of the upper plate member 1 to support the welding torch 12.

When the motor 7 is energized, the copying wheel 5 is rotationally driven by the rotation of the motor 7, and the one-bogie base 4 moves along the vertical plate member 2. Since the intermediate wheel 8 is constantly in contact with the inner surface of the vertical plate member 2 and the truck base 4 moves, if the thickness of the vertical plate member 2 is constant, the distance between the contact surface of the intermediate axle 8 and the weld line 3 is constant. Welding torch 12 is connected to blocks 24, 25 . Since it is connected to the intermediate axle by a connecting means such as a sliding shaft 15, the welding line 13 is always the target position of the welding torch 12. Regardless of the curved shape of the vertical plate member 2, the cart moves following the vertical plate member 2, and the target position of the welding torch 12 becomes the welding line 13.

FIG. 5 shows a front view of another embodiment of the invention. In this case, another copying wheel 35 is connected to the intermediate axle 8.
The block 25 is pivotally mounted opposite to the block 25. This tracing wheel 35 comes into contact with the outer surface of the vertical plate member 2. Block 2
5 slides against the paper base 4, and a compression coil spring 34
gives a repulsive force to the block 25 so that it moves to the left on the base 4. Due to this repulsive force, the tracing wheel 35 comes into contact with the outer surface of the vertical plate member 2 under pressure. A rope 37 is fixed to the block 25, and this rope 37 is wound around the drum 29 via a roller 36, so that when the handle 28 is turned to release the pressing force on the intermediate axle 8, it can be copied simultaneously. The pressurizing force of the vehicle 11-35 is released.

The other structure is the same as the embodiment shown in FIG.

In this embodiment, the copying mechanism of the truck 4 and the welding torch 12 are
Since the following mechanism is separated as described above, the welding line 3 is always the target position of the welding torch 12 even if the thickness of the vertical plate member 2 is not constant.

〔Effect of the invention〕

As explained above, according to the present invention, even if the vertical plate member has two straight parts, two curved parts, etc., singly or in combination,
Since stable running performance of the truck can be obtained and it is possible to follow the weld line, good horizontal fillet welding can be performed, which is extremely effective.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the relationship between the vertical plate member 2 and the upper plate member 1. FIG. FIG. 2 is an exemplary drawing for explaining the present invention, and is a plan view schematically showing the relationship among the intermediate wheel 8, copying wheel 5, and welding torch 12. FIG. 3 is a front view of one embodiment of the present invention, and FIG. 4 is a side view. 12- FIG. 5 is a front view of another embodiment of the present invention. 1: Upper plate member 2: Vertical plate member 3: Welding line 4: Cart base 5: Copying wheel 6: Chain 7: Motor 8: Intermediate axle 9: Support rod 10.34: Coil spring 11: Torch holder (welding rod holder) ) 12: Welding torch 13: Support wheel 14: Sliding bearing 15: Sliding shaft (holder support means) 1
6: Caster (vertical copying wheel) 17: Stopper 18; Child 19; Guide shaft 20: Adjustment knob 21: Feed screw 22 nib bracket 23: Support shaft 24: Support block 25: Sliding block (connection means)
26: Handle 27.37: Rope 28: Handle 29 Drum 30.36: Roller 31: Claw 32: Handle 33: Sliding bearing 35: Holder copying wheel Patent applicant Nippon Steel Welding Industry Co., Ltd. Figure 3 Figure 4

Claims (3)

[Claims] (1) Holder support means for supporting the welding rod holder; truck base; connection means for connecting the holder support means to the truck base; support wheels that support the truck base to at least one of the vertical plate member and the lower plate member ; Two copy axles connected to the bogie base and located on one side of the inner and outer surfaces of the vertical plate member and facing the vertical plate member; Connected to the bogie base and located on one side of the inner and outer surfaces of the vertical plate member one intermediate axle located on the other side of the longitudinal plate member, and located between the two copying axles in the direction in which the two copying axles are lined up; a pressure for pressing the wheel against the vertical plate member; means; and a prime mover for rotationally driving the wheels; at least one of the two tracing wheels and one intermediate wheel is movable forward and backward with respect to the vertical plate member, and an axle that is movable forward and backward is provided. The self-propelled welding cart is configured such that the suppressing means presses the vertical plate member; and at least one of the supporting axle, two copying axles, and one intermediate axle is rotationally driven by the prime mover. (2) The holder support means has a mechanism that moves up and down by its own weight and a vertical tracing axle that supports this mechanism and contacts the lower plate member; The self-propelled welding cart according to claim 1, wherein the distance of the holder support means from the holder is maintained constant. (3) The holder support means has a mechanism that moves up and down by its own weight, and a vertical tracing wheel that supports this mechanism and comes into contact with the lower plate member; A holder copying axle facing the member and coupled to the holder support means side, and an outer copying suppressing means for pressing the holder support means in a direction in which the holder copying axle abuts against the vertical plate member. The self-propelled welding cart described in (1).