JP2932779B2 - Post-heating device for butt welding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a production line for thin sheets of high carbon steel, alloy steel, silicon steel, etc.
The present invention relates to an induction heating device of a butt welding machine used for surface treatment and the like, particularly when welding a butt portion of a thin plate, backing the butt portion from the back side, and after the welding is completed, performing post-heating of the portion. Related to post-heating equipment.

[0002]

2. Description of the Related Art In laser beam welding, arc welding, plasma welding, and the like, in which a pair of members to be welded, that is, a cut end face of a thin plate is butt-welded, welding is performed while backing the butt portion and martensitic transformation After the welding is completed, post-heating (annealing) of the portion is performed in order to prevent the occurrence of the problem.

As a prior art of such post-heating, there is a backing apparatus for a welding machine described in Japanese Patent Application Laid-Open No. 1-99797. FIG. 3A is an explanatory view of a main part of the backing device for a welding machine.
The first back bar 31a is pressed, and the butted portion 30a of the thin plate 30 is welded by the welding torch 32. When the welding is completed, the backing device 31 is once lowered, and
After rotating by 0 degrees, the induction heating coil 31b is switched to the induction heating coil 31b, which is raised until it comes into contact with the welding portion (butting portion 30a), and post-heating is performed for about one minute. After the end of the post-heating, the backing device 31 is lowered, and the induction heating coil 31b is moved to the thin plate 30.
Away from

[0004] In practice, welding is performed while clamping the thin plate 30 with a pair of upper and lower clamps.
These are omitted.

[0005]

However, some thin sheet materials do not require post-heating after welding, in which case only the time for welding is sufficient. Therefore, conventionally, when thin plates made of different materials are flowed on the same production line, there is a problem that the plate joining time required for the welding and post-heating steps is not constant, so that a uniform operation cannot be performed.

Conventionally, as shown in the operation explanatory view of FIG. 3B, after completion of welding over the entire width of the butted portion 30a of the thin plate 30, the welded portion is simultaneously post-heated. (1 to 2 minutes) greatly affects the amount of loop in the subsequent stage. In particular, recent continuous post-heating lines (CA
As shown in L), in a system for processing at a speed of 1000 [m / s], there is a problem that the loop amount increases by 1 to 2 km due to the splicing time, which leads to an increase in equipment cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to reduce the time required for the welding and post-heating steps to be constant and to reduce the equipment capacity. To provide a post-heating device.

[0008]

According to the present invention, in order to achieve the above object, the cut end faces of a pair of members to be welded are abutted, and the abutted portions are backed by a back bar and moved along the cut end faces. In the post-heating device of the butt welding machine, the butt portion is sequentially welded with a welding torch to be performed, and after the welding is completed, the disk is rollable in the welding direction in place of the back bar. A backing member is provided, and further, the backing member and a heater for partially post-heating a welding location are mounted on a truck running in synchronization with the movement of the welding torch, and the butt portion is welded with a welding torch. During welding, the welding location was backed by a backing member, and after the backing member was moved, the welding location was sequentially heated by a heater.

[0009]

The welding torch and the bogie move synchronously along the butted portion of the members to be welded. At this time, the backing member moves while abutting against the back side of the member to be welded, so that the backing of the welded portion can be performed, and after the backing member is moved, the welding portion is sequentially post-heated by the heater. Therefore, post-heating is performed without waiting for completion of welding over the entire width of the member to be welded.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a conceptual diagram of a post-heating device of a butt welding machine according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a specific configuration thereof.

In the drawing, reference numeral 30 denotes a thin plate as a member to be welded;
Is a butt portion (weld portion), 32 is a welding torch, 3
Reference numerals 3a, 33b and 34a, 34b denote upper and lower clamps for clamping the thin plate 30, respectively, which are the same as those in the conventional example.

Reference numeral 10 denotes a rotary backing member,
1 is its bearing, 12 is a support member, 13 is a heater, 14
Denotes a matching unit, 20 denotes a bogie, 21 denotes an elevating mechanism, 22 denotes a cable carrier, and 23 denotes a rail.

The backing member 10 has a thin plate 30
Is a disk-shaped (rotary type) that can roll on the bearing 11 as a fulcrum while abutting against the back side of the conventional back bar 31 during welding. Performs the same operation as. The backing member 10 is mounted on a carriage 20 via a support member 12.

The heater 13 is for partially post-heating the welded portion. For example, an induction heating coil (heating portion) is connected to the matching portion 1.
4 attached. The heater 13 is also mounted on the carriage 20, and is configured to move while sequentially heating the welding locations after the thin plate 30 is backed by the backing member 10.

The bogie 20 travels on the rail 23 in the welding direction in synchronization with the movement of the welding torch 32. If necessary, the lifting mechanism 21 raises and lowers the backing member 10 and the heater 13 together. .

The cable carrier 22 guides a power supply and control signals for running control of the carriage 20, elevation control of the lifting mechanism 21, and heating control of the heater 13 from a control device (not shown). It is configured to be able to follow the movement of.

Next, the operation of the post-heating device of the butt welding machine having the above-described structure will be described.

When performing welding, first, the backing device 10 and the heating section of the heater 13 are adjusted to the same height by controlling the lifting / lowering mechanism 21, and the welding torch 32 and the bogie are moved along the butted portion of the thin plate 30. And 20.

At this time, since the side portion of the backing member 10 moves while abutting against the back side of the thin plate 30, the backing of the welded portion is performed sequentially, and immediately after the movement of the backing member 10, The welding location is partially heated by the heater 13.

Therefore, the time required for welding and post-heating becomes uniform irrespective of the material of the thin plate 30 and the thin plate 3
Since post-heating is performed without waiting for the completion of welding over the entire width of 0, tact time can be significantly reduced.

[0022]

As described above, the post-heating apparatus for a butt welder according to the present invention mounts a rotary backing member and a heater on a carriage that moves in synchronization with a welding torch, and performs welding. The torch and the backing member are opposed to each other via the butted portion of the member to be welded. During welding, the backing member sequentially backs up the welding location, and after the backing member is moved, the welding location is partially heated by a heater. Since the post-heating is carried out in the same way, even when the members to be welded of different materials are flowed on the same production line, the joining time required for the welding and post-heating processes is constant, and uniform work can be performed. This has the effect.

Further, the joint time can be shortened, and there is also an effect that the equipment cost is remarkably reduced as compared with the conventional one.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a post-heating device of a butt welding machine according to one embodiment of the present invention.

FIG. 2 is a perspective view showing a specific configuration of a post-heating device of the butt welding machine of the present embodiment.

FIG. 3A is an explanatory view of a main part of a conventional backing device for a welding machine, and FIG.

[Explanation of symbols]

10 backing member, 13 heater, 20 trolley, 30
Thin plate (member to be welded), 30a: Butted portion (weld location), 32: welding torch.

Claims (1)

(57) [Claims] 1. A cut end surface of a pair of members to be welded is butt-joined, the butt portion is backed with a back bar, and the butt portion is sequentially welded with a welding torch moving along the cut end surface to complete welding. In a post-heating device for a butt welding machine that is configured to perform post-heating of a welding portion thereafter, a disk-shaped backing member that can roll in a welding direction is provided instead of the back bar, and further, the movement of the welding torch is performed. A carriage that travels in synchronization with the backing member and a heater for partially post-heating the welding portion are mounted, and when the butt portion is welded with a welding torch, the welding portion is welded with the backing member. A back-heating device for a butt welding machine, wherein the backing member is back-heated after the backing member is moved, by sequentially heating the welding location with a heater.