JPS5935343Y2 - "Kuru" welding machine - Google Patents

Description

[Detailed description of the invention] This invention creates a box-shaped column with a substantially square cross section by abutting the opposite edges of a pair of U-beams with a diaphragm welded to the inside of the protruding position of the joint beam. or a pair of U's to short force of 7 lunges
The abutting portions are welded to form a box-shaped column with an elongated rectangular cross section by abutting the section steel, or a narrow beam is formed by welding a pair of section steel in parallel. This invention relates to a welding machine that welds the inside of a cylindrical body.

When welding the inside of the cylindrical body with a narrow inner width, for example, when forming a box-shaped column by abutting the side edges of a pair of U-beams with diaphragms welded to the inside of the joint beam protruding position, the inside Since the welding machine cannot be moved because the diaphragm is damaged, the inside of the abutting part cannot be welded, and only the outside of the abutting part is welded.

However, welding the outside of the abutting portion not only requires a great deal of labor to add backing metal to the other side, but also requires a large amount of welding, resulting in a significant increase in cost.

Therefore, the outer central part of the diaphragm is shown in FIGS. 9 and 1.
As shown in Figure 0, when the diaphragm is notched in a trapezoidal shape and the width of the diaphragm is made slightly narrower than the width of the flange of the U-shaped steel, a space a is formed in the center between the pair of diaphragms.
and a gap is formed between both ends of the diaphragm, the torch is moved within the gap, and the welding machine body is allowed to pass through the central space a to weld the abutting portions of the U-beams from the inside. It became possible.

However, the space a and the gap between the diaphragms need to be reduced as much as possible in order to ensure the reinforcing effect that is the original purpose of the diaphragms.

Therefore, the only option was to weld while moving the torch in a certain hanging position without riving it, and the welding width and welding method from the inside were insufficient.

In addition, if the space between the webs of the box-shaped column having an elongated cross section, or the beam formed by welding a pair of I-shaped steel flanges, that is, the narrow box-shaped body, is approximately equal to the space a of the diaphragm described above, it will be difficult to weave with the torch. It was difficult to weld from the inside because various devices could not be passed through it.

The present invention aims to improve the above-mentioned drawbacks,
On the upper surface of the front end of the beam that runs on the rail, a torch holder with a torch hanging from the front end is supported so as to be rotatable in the horizontal direction about a vertical axis, and a guide hole is drilled in the rear end of the torch holder. An eccentric ring fixed to the axis in the front-rear force direction is fitted and inserted, and the axis in the front-rear force direction and a drive device provided on the upper surface of the rear part of the beam are movably connected by a flexible shaft, so that the torch can move left and right. It is characterized by being configured so that it can be used live.

The present invention will be explained in more detail with reference to the embodiments shown below. 1 is a U-shaped steel made by bending a steel plate as shown in Figs. A diaphragm 2, 2 having a width X narrower than the flange part 1a and having a trapezoidal notch part 2a on one side is welded to the inner surface, and both sides of the edge of the flange part 1a are ground diagonally, and then the diaphragms 2, 2 are assembled into a pair. When the U-shaped steels 1, 1 are combined so that their corresponding diaphragms 2, 2 are on the same plane and their edges abut, the whole is formed into a box-shaped column, and the inside and outside of the abutting part are combined. A V-shaped groove is formed in the groove.

Next, a device for welding the open grooves, particularly the inner open grooves, will be explained.

The beam 3 is made of a hollow box-shaped member, and a guide roller 4 pivotally supported on the lower front surface thereof has a V-shaped protrusion extending all the way around the center of the width of the outer peripheral surface. It fits into the open groove and rolls with its both sides pressed against the plate surface of the flange portion 1a.

Further, a rolling wheel 5 is provided on the lower surface of the intermediate portion of the beam 3, the rear end of the beam 3 is connected to a truck 7 running on a guide rail 6, and the intermediate portion is supported by an intermediate support truck 8.
A narrow rail 9 protruding from the lower front surface of the beam 3 rests on a V-pulley-shaped guide wheel 11 that is pivotally supported on a support 10 on the guide rail 6. When passing, it is designed to lie down on the side or in the front-back direction.

A fixing plate 12 is attached to the base of the front upper surface of the beam 3.
A torch holder 14 is rotatably supported via a roller bearing 15 by a vertical shaft 13 fitted in the torch holder 140, and a torch 16 is vertically disposed at the front end of the torch holder 140 via a stay 16a. The guide hole has a shape in which the upper and lower parts of a vertically long southern circle are shaped like 9, in other words, the diameter in the direction of lateral force is approximately equal to the diameter of the eccentric wheel 17, which will be described later, and the radius of the R surfaces 18at and 18a on both sides is the eccentric wheel. Guide hole 1 with a radius slightly larger than 17 and open at the top and bottom.
8 is bored, and in this embodiment, the diameter of the eccentric wheel 17 is 28. In this case, the R surface 18a.

The radius of 18a was set to 17.5 mm.

In addition, if the eccentric wheel 17 has the shaft hole 19 at a position eccentric by 2 m from the center position, a protrusion 2 is immediately formed in the middle part of the outer periphery.
A main body 17a with an outer diameter of 15rIan and a ball bearing 1 with an outer diameter of 28mm tightly fitted therein.
7b, and the ball bearing 17b is connected to the seat plate 17.
c is held by screwing it onto the main body 17a,
The front end is inserted into the shaft hole 19 and fixed, and the bearing 21
The rotating shaft 22 supported on the beam 3 by the pipe 23
It is attached to the rear upper part of the beam 3 via a flexible shaft 24 installed inside the beam 3, and is operatively connected to the shaft of a variable speed motor 25 constituting a drive device.

Furthermore, a conduit 26 whose front end is connected to the toe f16
guides the welding wire 27, and the welding wire 2
7 supports the rolled ball 27a on the cart 7, and
It is supplied by a feeding device 28 attached.

A gas hose (not shown) is connected to the torch 16 through the beam 3.

Further, numeral 29 in the drawing is a spanter protector.

In the above-mentioned apparatus, when welding the open groove inside the box-shaped column formed by combining the U-shaped steels 1 and 1 from the left and right,
The beam 3 is inserted from one end of the stationary box-shaped column in the state shown in FIG. 2. The guide roller 4 rolls in the open groove, and the middle part of the beam 3 is moved by the guide cart d, and the rear part is The beams advance while being supported by the carts 7, and when the beam 3 is inserted by about half its length, the rollers 45 enter the box-shaped pillars and roll.

In the meantime, the beam 3 passes through the space a formed by the cutouts 2a, 2a, and the torch 16 passes through the gap at the bottom of the diaphragms 2, 2.

When the torch 16 at the tip of the beam 3 reaches the other end of the open groove in this way, the variable speed motor 25 attached to the rear end of the beam and located outside the rear end of the box steel The feeding device 28 is activated and the beam 3 is moved out by the cart 7 while welding is performed.

At this time, the torch holder 14 weaves left and right around the vertical axis 13 due to the rotation of the eccentric wheel 11, so the torch 16 also reciprocates left and right, and even if the opening groove is widened, the welding can be made to a sufficient width and depth. When the wheel 5 comes out, it moves backward while pushing the intermediate support truck 8, and when the entire welding is completed, the beam 3 returns to the state shown in FIG. 2.

Further, the eccentric wheel 17 rotates around the rotating shaft 22, and the inner peripheral surface of the guide hole 18 of the torch holder 14 has a diameter in the direction of lateral force equal to the diameter of the eccentric wheel 17, and the R surface 18a Since the radius is X-shaped and the top and bottom are open, the torch holder 14 does not move up and down but only weaves in the lateral direction, making it possible to perform reliable welding.

Note that the outer open groove is appropriately welded using a conventional welding machine such as a sub-margin arc welding machine.

In addition, when welding the abutment part inside a box-shaped column having an elongated rectangular cross section, for example, a narrow inner cavity whose force width is about the size of the space a, the box-shaped column having the aforementioned diaphragm can be used. A method similar to - d.

Next, another embodiment of the present invention will be described with reference to FIG. 11. A pair of I-shaped steels 30. By welding from the inside and outside, a beam that is not only rigid but also strong against torsion can be obtained, and the diaphragms 2, 2 may be welded to the inside, or may not be welded.

Since the present invention is configured as described above, it is possible to reliably weld the entire width of the open groove while weaving the torch with lateral force.

Moreover, as described above, the device for weaving the torch is constructed by fitting an eccentric ring into the hole of the torch holder supported by the vertical axis on the front part of the beam, and the rotating shaft of the eccentric ring is installed at the rear part of the beam. Since the torch, torch holder, eccentric wheel, etc. can be accommodated within the horizontal width of the beam, the notch in the diaphragm can be easily accommodated even though the torch weaves in the direction of lateral force. Welding can be carried out while easily passing through the gap between the ends of the welding material and the narrow lumen of a box-shaped body having an elongated rectangular cross section.

Moreover, at the front end of the beam, within the width of the beam as mentioned above,
Since it is only necessary to provide a torch holder that can be attached to the torch, the notch can be made smaller when the diaphragm is fixed, and the reinforcing effect of the diaphragm can also be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a plan view, Fig. 2 is a side view, Fig. 3 is an enlarged side view, Fig. 4 is a plan view of the torch holder, and Fig. 5 is a plan view. is the same side view, No. 6
The figure is a rear view of the same as above, Fig. 7 is a front view of the eccentric, Fig. 8 is a partially cutaway side view of the same as above, Fig. 9 is a sectional view of the box-shaped column, and Fig. 10 is a perspective view of the U-shaped steel. , FIG. 11 is a sectional view of an example in which two type steels are welded in parallel. 1...U-shaped steel, 2...-diaphragm,
3...beam, 6...guide rail,
14...Torch holder, 16...Torch, 17...Eccentric shaft, 24...Flexible shaft, 25...Variable motor, 30...
I-type steel.

Claims (1)

[Scope of utility model registration request] On the upper surface of the front end of the beam running on the rail, a torch holder with a torch hanging from the front end is supported so as to be rotatable in the horizontal direction about a vertical axis, and a guide hole is drilled in the rear end of the torch holder. An eccentric ring fixed to the front-rear shaft is inserted into the shaft, and the front-rear force direction shaft and a drive device provided on the rear upper surface of the beam are interlocked and connected by a flexible shaft, so that the torch moves left and right. A welding machine characterized by being configured to.