JPH0771713B2 - Welding method for rebar cages - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding method for knitting a reinforced basket used for concrete piles and fume pipes.

[0002]

2. Description of the Related Art A reinforcing bar cage as described above is knitted by arranging a plurality of vertical bars in a cylindrical shape, winding a spiral bar around its outer circumference, and welding the respective intersections thereof.

In this conventional reinforcing bar cage knitting machine, a plurality of vertical bars are arranged in a cylindrical shape and are moved in the axial direction while being rotated, and a spiral bar is supplied to the outside of the moving vertical bars to wind the vertical bars. There are those that weld the intersection of the spiral muscle and those that rotate the longitudinal muscle without moving it in the axial direction, and move the feeder of the spiral muscle.

[0004]

In the conventional knitting method as described above, various methods have been developed as a method of driving the longitudinal muscles and a method of supplying the helical muscles, but the intersection of the longitudinal muscles and the helical muscles is melted.
The welding method for contact is to use a pair of electrodes at the intersection of the vertical and spiral lines.
Resistance welding, in which the
There is a torch for arc welding and arc welding with electrode welding.
It By the way, in the former resistance welding, a pair of electrodes
I have to stay at the intersection of the spirals for a certain time
To increase the axial moving speed of the vertical muscles or the winding speed of the spiral muscles.
It is not possible to make it difficult, and the knitting efficiency of the rebar basket is poor,
Resistance welding has a problem that the strength of the welded portion is weak.
In the latter arc welding, the strength of the weld is said to be strong.
However, welding takes longer than resistance welding.
Conventionally, welding is performed at each intersection of the vertical and spiral lines.
In this method, the turning of the vertical bar and the winding of the spiral bar are made intermittent.
It must be said that the rebar cage composition efficiency is extremely poor.
There's a problem.

Therefore, the object of the present invention is to achieve arc welding.
By utilizing the advantage of excellent welding strength, arc welding
Weld multiple intersections simultaneously and repeat this
By doing so, it is possible to efficiently knit a reinforced basket with excellent strength.
To provide a welding method .

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention makes a longitudinal muscle group which moves in an axial direction turn while winding a spiral muscle on the outer side thereof , and the turning vertical muscle group and the spiral. after both fixed angular rotation between the intersection approaching the outside of the plurality of intersections of lines, multiple repeating movement to return to the original position
Number of arc welding torches and electrodes that contact the inside of the vertical bar group, arc-weld the plurality of intersections, and repeat this welding.
This is a method of returning and returning .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.

In the figure, 1 is a base frame and 2 is a support frame fixed on the frame 1.

A plurality of grooved guide rollers 3 are arranged in the front portion of the support frame 2, and the inner circumference of the ring gear 4 is engaged with the grooves of the rollers 3 to be rotatable.

Welding means A is provided on the front surface of part of the ring gear 4.
To provide. The welding means A is provided with a guide rail 6 on the lower surface of the horizontal portion of an L-shaped bracket 5 fixed to the ring gear 4, and a guide rail 6 in the moving direction of the vertical streaks 7, and a movable base 8 movably mounted on the rail 6 having a fan shape. Install the guide plate 9 of.

A plurality of radial guide rails 10 and 11 are fixed to the front and rear of the guide plate 9 at regular intervals, and each front guide rail 10 is provided with a grooved roller 12 which engages with a spiral line 13. The roller mounting frame 15 is attached so that it can move back and forth.

The roller 12 is rotatably mounted on a shaft 14 fixed to the end of a mounting frame 15 toward the rear, and the mounting frame 15 is mounted by an air cylinder 17 mounted on a bracket 16 fixed to the moving frame 9. Go back and forth.

The rear guide rail 11 is equipped with a mounting frame 18 which is moved forward and backward by an air cylinder 17 mounted on the guide frame 8. A guide rail 20 provided on an inclined table 19 fixed to this frame is provided with a guide rail 20 for arc welding. The mounting base 22 having the torch 21 is mounted so as to be movable back and forth, and is moved back and forth by the air cylinder 23 mounted on the tilting base 19.

The support frame 2 has a front wall 25 and a rear wall 26, and front and rear walls 25, 26 are provided with a cylinder 27 concentric with the ring gear 4.

A mountain-shaped convex strip 28 is formed on the entire outer circumference of the cylinder 27, and tapered guide rollers 32 are attached to a plurality of brackets 30 and 31 provided on the facing surfaces of the front and rear walls 25 and 26, respectively. Clamped at 33 and made rotatable.

A circular opening is provided in each of the walls 25 and 26 so that the opening is concentric with the cylinder 27.

A guide plate 35 provided inside the cylinder 27.
A plurality of guide holes 36 through which the vertical stripes 7 pass are provided in the.

Further, a chain wheel 37 is fixed to the rear portion of the outer periphery of the cylinder 27, and a chain wheel 41 fixed to a shaft 40 of a speed reducer 39 connected to a motor 38 provided on the base frame 1 and an endless transmission chain to the chain wheel 37. Four
Multiply by 1 to drive the cylinder 27.

A base 45 on the front of the base frame 1
A motor 46 and a speed reducer 47 connected to the motor 46 are provided above, and a gear 49 fixed to a shaft 48 of the speed reducer 47 is meshed with the ring gear 4.

An arm 50 is provided at the center front part of the guide plate 35.
Is provided, and the tubular bracket 51 is fixed to the tip thereof,
A plurality of grooved guide rollers 52 that support the inside of each vertical line 7 of the welded portion are rotatably mounted on the front and rear of the outer periphery of the bracket 51.

A vertical streak distributor 54 is provided on the machine base 53 behind the base frame 1.

This distribution device has a plurality of vertical line guide tubes 55 arranged in a cylindrical shape, and a vertical line insertion device 56 behind the vertical line guide tubes 55.
The plurality of vertical streaks 7 extruded from are inserted into the guide tube 55, become cylindrical, and are extruded in front of the guide tube 55.

Each of the vertical stripes 7 is inserted into each of the guide holes 36 of the guide plate 35 and guided to the outside of each of the guide rollers 52.

Further, a spiral muscle feeding device 58 is provided on the front side of the distribution device 54, and after the spiral muscle 13 drawn from the coil master 57 and fed from the device 58 is straightened by the straightening device 59. Then, it is fed to the welding means A, passed through between the grooved roller 12 and the vertical bar 7 and wound on the outer side of the vertical bar group.

Then, the torch 21, the vertical line 7, and the spiral line 13
The arc caused by the discharge is blown to the intersection point a and the intersection point a is welded due to its high temperature.

At this time, the welding means A has a plurality of torches 21.
However, since the intersection point a also moves with the rotation of the vertical streak group, the ring gear 4 rotates together with the vertical streak group during welding to simultaneously weld a plurality of intersection points a, and when the welding is completed, the discharge is stopped, The ring gear 4 reverses by a certain angle to direct each torch 21 to the unwelded intersection a and at the same time
Starts the normal rotation again and starts welding.

As described above, the ring gear 4 is normally and reversely rotated by the forward and reverse rotations of the motor 46, so that a plurality of intersections a are welded at the same time to form a knitted rebar cage B which is fed forward.

During this time, the cylinder 27 is rotated by the motor 38 in the winding direction of the spiral bar 13 together with the vertical bar group 7.

As shown in FIGS. 1 and 2, the base frame 1
A support base 60 is provided from the front part to the front, and a basket traction carriage 62 that moves along a guide rail 61 is provided on the support base 60. Each vertical stripe 7 of the reinforcing bar basket B formed as described above is provided on this carriage. Reinforcing bar cage traction device C is provided for pulling by pulling the tip of.

Further, on the supporting base 60, reinforcing bar cage supporting devices 63 for raising the reinforcing bar cage B to support the reinforcing bar cage B are provided at regular intervals.

[0031]

As described above, according to the present invention, a plurality of intersections of the longitudinal muscle group and the spiral muscle are approached while
After rotating by a certain angle, multiple arc melts that return to their original positions
The intersection of the contact torch and the electrode that contacts the inside of the vertical muscle group
Was welded and repeated so that the torch
Secures welding time during the intersection and synchronous rotation,
When returning to the position, the torch faces the unwelded intersection at the next position.
Welding is started, which causes the vertical bars to move and rotate continuously.
Arc welding can be performed by turning and intersecting points, arc welding
Can significantly improve the knitting efficiency of the rebar cage
It We also weld multiple intersections with multiple torches at the same time.
Along with, the torch was moved in synchronization with the rotation of the intersection.
After that, return to the original position and repeat welding.
Arc welding with a longer torch travel stroke
The time required for
Reinforcing cages can be continuously formed.

[Brief description of drawings]

FIG. 1 is a plan view for implementing the method of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is an enlarged side view of the main part of the above.

FIG. 4 is an enlarged side view of a part of the welding means and its vicinity.

FIG. 5 is a front view of welding means.

FIG. 6 is an enlarged cross-sectional view showing a part of a vertical streak guide portion.

[Explanation of symbols]

 A Welding means 7 Vertical line 13 Spiral line 21 Torch 51 Bracket 52 Grooved guide roller

Claims (1)

[Claims] 1. A method for welding a reinforcing bar basket in which a spiral bar is wound on the outside of a vertical bar group composed of a plurality of vertical bars arranged in a cylindrical shape and the intersections thereof are welded, and the vertical bar group moving in the axial direction is swung. while winding the spiral muscle on the outside, this axial direction
After both fixed angular rotation between the intersection approaching the outside of the plurality of intersections of longitudinal muscles and the spiral muscle to move and turn in the direction, and a plurality of arc welding torches repeating movement to return to the original position, said longitudinal A method for welding a rebar cage, characterized in that the plurality of intersections are simultaneously arc-welded by electrodes contacting the inside of the muscle group, and the welding is repeated .