JPS59218220A - Automatic straightening linear heating device of box type steel structure - Google Patents

Abstract

PURPOSE:To obtain a titled automatic straightening linear heating device which executes automatically a linear heating to a vertical wall surface of a box type steel structure and also executed a uniform heating, by installing a body so as to contact along said verticall wall surface, and lifting and lowering a lifting body for holding a torch by a lifting mechanism. CONSTITUTION:A body 1 is installed in parallel to a vertical heating surface of a steel structure to be heated 5, and held stably by a magnet 6 adsorbed to the upper face of the structure 5, and a stable leg 7 which abuts on a vertical wall surface. Also, the body 1 is provided with a screw rod 8 for lifting and lowering a lifting body 2, and a motor 9 for driving to rotate it. Also, the lifting body 2 is provided with a torch holding arm 11 which is inserted and held, and supported by guide rollers 10 placed up and down and on the left and right, and a gas burner torch 12 is attached to its tip. This device of said constitution contains a microcomputer, controls an ascending and descending speed of the torch 12, a left and right moving extent of the arm 11, a torch operating locus, setting of a fire extinguishing point, etc. by the conditions of a size of a structure, a plate thickness, a deformation correcting quantity, etc., the structure is brought to linear heating, and its automatic straightening heating can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic strain relief linear heating device used for strain relief when manufacturing box-shaped steel structures.

Large copper girders, columns, etc. used in buildings, bridges, etc. are manufactured by assembling steel plates welded with stiffening materials such as ribs and panels into seven langes and webs into an H shape or box shape. However, during manufacturing, it is inevitable that deformation (distortion) will occur in the produced and finished products due to localized heating due to welding.

In order to correct this deformation, a widely used method is to linearly heat one side of the structure and use the shrinkage phenomenon when that part cools down to the original temperature to correct the deformation. .

Conventionally, in this linear heating work, workers observe the structure's size, plate thickness, amount of deformation, etc., decide the range and degree of linear heating, and heat the structure one by one using a hand-held gas burner. was. Therefore, each worker can only operate one gas burner, which is a very time-consuming task, and may also cause material deterioration due to uneven burning.

The purpose of the present invention is to automate this inefficient linear heating operation, and also to enable uniform heating.

Next, a detailed explanation of these inventions will be given with reference to the drawings.

The figure is a conceptual diagram showing a state in which the automatic strain relief heating device according to the present invention is installed and heated to correct the deformation of a box-shaped column, and the shaded area indicates the heating range.

]・=Figure 3 Figure 3 shows the locus of movement of the torch in the case of heating multiple strips with thick lines, and the heating range is shown with diagonal lines.

The figure is a front view of an embodiment of the present invention. The diagram is
FIG. The main part of the main body (1) is the elevating body (2)
It has a slide base (3). (4) is a guide roller that rolls while sandwiching the slide base (3). The main body (1) is installed parallel to the vertical heating surface of the steel structure to be heated (5), and includes a magnet (6) that attracts the upper surface of the steel structure, and a stabilizing leg (which is held in place by force) that comes into contact with the vertical wall surface. Ru.

The main body (1) has an elevating body (2 screws (8) for raising and lowering the body).
A motor (9) is provided to rotate this.

The elevating body (2) is provided with a torch gripping arm αυ that is sandwiched and supported by guide rollers 〇〇 arranged on the top and bottom, left and right sides, and is movable left and right.
is installed.

The elevating body (2) is provided with a crank α stage, and this crank α3) is driven by a motor (not shown).

The crank α wrinkle and the torch gripping arm αD are connected by a connecting rod αa, and the crank (arm Q1 due to the movement of 131) reciprocates left and right with a constant stroke via the connecting rod α. Note that it is also possible to stop the movement of the crank and arm using a switch or the like. α■ is a limit switch installed at the bottom end of the main body (1),
The elevating body (2) stops moving up and down.

To use this device with the above configuration, a microcomputer is installed, and depending on conditions such as the size and thickness of the structure, the amount of deformation correction, etc. The amount of left-right movement of the torch, the width and speed of the left-right swing, the setting of the torch travel trajectory and extinguishing point, etc. can be controlled to automatically eliminate strain and heat.

Figure G is a plan view of the torch attachment part. Insert the torch mounting bracket into the hole provided at the end of the torch gripping arm αυ and fix it with the set screw Cυ. This is to set the torch αa at a position with an appropriate distance from the heating surface.

Figure 2 is a front view showing an embodiment of a horizontal movement mechanism that moves the torch gripping arm αυ left and right by an arbitrary length, and a rack is provided at the torch gripping arm ←0, and an elevating body that meshes with the rack is provided. (2) Due to the rotation of the pinion αe, 4
Not only can αυ be swung left and right, but it can also be moved left and right with arbitrary strokes. Binion Kan is a motor (1
7).

, LR shows another embodiment corresponding to the embodiment shown in FIG. 17, in which a fluid cylinder 81 causes the torch gripping arm aυ to swing left and right and to move left and right at an arbitrary stroke.

These operations can be controlled by a microcomputer as described above.

As described above, according to the present invention, the main body is installed along a required vertical wall surface of a box-shaped steel structure, and the vertical wall surface of the steel structure is moved by raising and lowering the elevating body holding the torch using the elevating mechanism. Linear heating is performed automatically, and distortions in box-shaped steel structures can be corrected by repeating this process. In addition, by adding left and right rocking motion to the linear up and down motion of the torch, 17
As shown in the figure, a wide range of wall surfaces can be heated in a lightning bolt-like manner, making it possible to effectively heat the wall to remove distortion. Furthermore, by making the torch moveable left and right with arbitrary strokes, combining this with the lifting and lowering action, heating as shown in Figure 3 can be achieved, and distortion-reducing effective heating can be automatically performed by a program, etc. , which has excellent features.

[Brief explanation of drawings]

Figure 1 is a conceptual diagram showing how the device of the present invention is used. Figures 3 and 3 are diagrams showing examples of the movement trajectory of the torch. The figure is a front view of the device of the embodiment. The figure is its side view,
Figure 7 is a plan view of the gas burner torch, and Figure 7 is a front view of another embodiment. (1)...Body part, (2)...Elevating part, (3)...
・Slide base. (4)... Guide roller, (5)... iw structure, (6)... magnet. (7)... stabilizing leg, (8)... t-salary, (9)...・
・Motor, αω...Guide roller, αυ torch gripping arm, a2)...Gas burner torch, (13
...Crank, (14)...Connecting rod, αω...
Limit switch, (L6)...binion, <1
? )···motor. (1 volume...fluid cylinder. Patent applicant Kawasaki Heavy Industries, Ltd.

Claims (3)

[Claims] (1) The main body, which can be installed parallel to the vertical heating surface of the steel structure to be heated, is provided with an elevating body that is raised and lowered by an elevating mechanism, and the elevating body is used to linearly heat the surface of the steel structure. An automatic strain relief linear heating device for a box-shaped side structure, characterized in that it is equipped with a torch. (2) The main body, which can be installed parallel to the vertical heating surface of the heated fR structure, is provided with an elevating body that moves up and down using an elevating mechanism, and the elevating body linearly heats the surface of the steel structure. 1. An automatic strain relief linear heating device for a box-shaped steel structure, characterized in that a torch is provided on a torch gripping arm that swings by a left-right swing mechanism. (3) The main body, which can be installed parallel to the vertical heating surface of the steel structure to be heated, is provided with an elevating body that is raised and lowered by an elevating mechanism, and the surface of the steel structure is attached to the elevating body in a linear manner. An automatic strain relief linear heating device for a box-shaped steel structure, characterized in that a heating torch is provided on a torch gripping arm that can be moved left and right by an arbitrary length.