JPS58151971A - On-line jointing device for hot-rolled material - Google Patents

Abstract

PURPOSE:To reduce the cost of facilitates and to make a fault hard to occur, by allowing a jointing machine body provided with a lead-in guide member over a tape roll to run freely. CONSTITUTION:When the rear end part of a precedent sheet bar 6 comes close to the rear end of a jointing unit 15, an upper clamp and electrode 21 is lowered to clamp it with a lower clamp and electrode 20. In this state, the jointing machine body 10 moves on a rail toward a finishing rolling mill group together with the precedent sheet bar 6. At this time, a trailing sheet bar 6' is rolled by a rough rolling mill group and the speed of work rolls is increased to allow the bar 6' to catch the jointing machine body 10. The trailing sheet bar 6' is then guided to a jointing unit 15' through the lead-in guide member 27 and when its front edge comes out of the jointing unit 15', the upper clamp and electrode 21' is lowered to clamp it with the lower clamp and electrode 20'. A jointing cylinder 17 is driven to move the jointing unit 15' and both sheet bars 6 and 6' are set at a specific interval; and a current is supplied from a power source 22 to perform flash butt welding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an online joining device for hot rolled materials. A conventional hot rolling line is as shown in FIG.

Slabs are extracted one by one from the heating furnace 1, rolled to a predetermined thickness in the rough rolling mill group 2 to become sheet bars, conveyed by the conveying table 3, thinned into strips in the finishing mill group 4, and then rolled into strips by the coiler 5. It is designed to be wound into a coil.

In the conventional hot rolling line, the slabs are rolled by discontinuous rolling in which each slab is rough-rolled and finished-rolled, so there are the following problems. That is, (1) Each slab is processed by a rough rolling mill group 2. It is necessary to smoothly engage the upper and lower rolls of finishing mill group 4, and it is necessary to adjust the tip shape and plate thickness of each slab. (2) The tip and rear ends of each slab should be As the temperature decreases, the product material becomes non-uniform.

(3) A space exists between the preceding slab and the succeeding slab in which rolling operations cannot be performed, resulting in low effective utilization of equipment and poor production efficiency.

As a means to solve the problem of discontinuous rolling, continuous EE rolling has been proposed in which slabs are joined while running.

In the case of hot rolling, the thickness of the slab is usually about 250 to 300 mm, and this is rolled to the product thickness by 3 to 4 rough rolling mills and 6 to 7 finishing EE mills. However, it is important to consider how to join the materials of any thickness and by what means, and how to realize completely continuous rolling from the joint to the running shear installed just before the coiler. That's a problem.

In other words, running welding in a thick slab state is
Since the speed of the slab is slow, the work is easy from this point of view, but on the other hand, there is no means to join thick slabs within the required cycle time (about 1 minute).

Also, while running welding in the IJ joint state is easier from a welding perspective, the running speed is faster, and there are problems with machine design and the running distance of the joint. Technical problems arise from this.

After considering the above-mentioned issues, the present Kabuto Meisho et al.
It was concluded that joining slabs with a thickness of 30 to 40 words (so-called sheet bars) using the flash butt welding method is optimal from various viewpoints such as joining technology, running speed, and running distance. In this case, the running speed is about t00m/m, and the running time is about 1 minute, including various installations, so L7.

Considering the equipment layout of the current general hot rolling line while taking into account the above-mentioned peripheral technology, it is assumed that the online joining machine for sheet bars is installed between the final rough rolling mill and the first stage finishing mill. is desirable.

However, when the sheet bars are butt-welded using flash butt welding, interference with the conveying table that is used to convey the sheet bars becomes the biggest problem. That is, in flash butt welding, as shown in FIG.
．． The ends of the sheet bars 6.6' are clamped by the upper and lower clamp electrodes 7.8, and a current is applied to each to generate flash sparks 9, and both sheet bars 6.6' are pressed in the directions A and B to join them. It is something. Therefore, the lower clamp electrode 8 will interfere with the roller of the conveyance table 3. As a means to solve the interference with the roller, the applicant of this patent proposed a roller that can swing or move up and down. proposed. While I was there.

In this method, there remains a problem in terms of equipment cost since the roller table (approximately 100 if the pitch is 1 m) is movable over a length of about 10.0 m.

Therefore, the inventors of the present invention have conducted various studies to create a fixed W type without moving the rollers, and as a result, they have constructed a running welding machine to move on table rollers, and raised the sheet bar to create a fixed W type. It was discovered that good results could be obtained by sending the wafer at multiple times, and the present invention and [2] were proposed.

The structure of the present invention will be explained in detail based on the embodiments shown in FIGS. 3 and below. As shown in FIGS. arm 1
1, 11. 11', 11' project horizontally, and the running wheels 12. --1 is rotatably provided. On the other hand, rail frames 15 and 157 are installed on the outside of the gear box 13 and bearing 14 of the table roller 3, and the rails 16 and 167 are fixed thereon, respectively. --1 can be mounted on the vehicle and run by a drive mechanism (not shown).

As shown in Fig. 3, inside the welding machine body 10, there is a welding unit (15i) on the discharge side and a welding unit (22i) on the inlet side.
15' ((installed so that it can move along the direction of movement of the seat bar 6. both joint units) 15. On the upper surface of 15', branch pieces 16° and 16' are respectively protruded, and one branch piece 16 has a The joining cylinder 17 is pivotally attached, the rod 18 is pivotally attached to the other branch 16/, and the joining unit 15' is moved.
It is now possible to press. Also, both junctions Uniso) 15. j
Inside the rollers 5/, there are pressure rollers 19 connected to a pair of upper and lower drive sources (not shown) that support and move the sheet pars 6, respectively.
---. -, 19/, ---1 are installed on the inlet side of the joining unit 15 and on the discharge side of the joining unit 15'. upper clamp electrodes 21, 2
17i is installed so that it can be raised and lowered freely, and is connected by cords 25 and 23' to a power supply 22 fixed to the top plate of the welding machine main body 1o.
Further, on the introduction side side wall of the welding machine main body 1o, support pieces 24 and 24' are fixed at both ends, respectively, to rotatably support the actuator @25. This operation l1qI]25 has branches 26, 26
'The introduction guide member 27 is fixed through 1 operation +
11125, one end of the link 28 is fixed, and the other end of this link 28 is pivotally connected to the guide fluid mechanism 30 which is pivotally connected to the welding machine main body 10 via the support piece 29. 30 vibrates the introduction guide member 27 via the operating shaft 25.

As shown in FIGS. 5 and 4, the introduction guide member 27 has an introduction groove 27a in the center in the height direction, and the lower guide plate 27
Multiple lower pinch rolls 31. on t+. --Introduce groove 2
Install it so that it is on the same plane as 7a. The upper guide plate 27c is provided with a window 27 (l) at a position opposite to the lower pinch roll 31 on the power introduction side, and the upper pinch roll 52 is fitted therein.
Bintirollno Uzing 35, 3 fixed inside the
It can be raised and lowered by a lowering block 35 attached to a lowering cylinder 34 fixed at 5'. Further, a chain wheel 36 is pivotally attached to one end of the upper pinch roll 32, and the welding machine main body 10
A chain belt 39 is attached to a chain wheel 38 attached to a motor 37 installed on the top plate of the machine, so that it can be driven.

Furthermore, a discharge guide member 43 is formed on the discharge side wall of the welding machine main body 10 by fixing guide plates 41 and 42 on the upper and lower sides so as to form the discharge groove 40 in an inclined state.

Although not shown in the first drawing, grooves are provided in the side walls of the welding machine main body 10 and the welding units (15, 15') so that the sheet pars 6 can pass therethrough.

This embodiment is constructed as described above, and the introduction guide member 27 is tilted by the guide fluid mechanism 30 as shown in FIG. 5, so that the lower guide plate 27bl is positioned on the upper surface of the table roller 3. The upper clamp electrodes 21 and 21' on both sides are both in the raised position.

When the preceding sheet bar 6 is roughly rolled in the above-mentioned state, the sheet bar 6 is introduced from the introduction groove 27a of the introduction guide member 27, moved by the upper and lower pinch rolls 52°31, and rolled between both joining units 15 and 15'. Pressure roller 19. ---,
19/, -- the discharge groove 4 of the discharge guide member 43 via the
0 and finished rolling mill group 4 by table roller 3.
sent to. Then, when the rear end of the preceding sheet par 6 is located near the rear end of the joining unit 15, the upper clamp electrode 21 is lowered and clamped with the lower clamp electrode 20 [see FIG. 6 (a)]. . In this state, the welding machine main body 10 is connected to the rails 16 and 1 together with the preceding sheet bar 6.
6' in the direction of finishing rolling mill group 4. At this time, the subsequent sheet par 6' is being rolled by the rough rolling mill group 2, and the speed of the work rolls (not shown) of the rough rolling mill group 2 is increased to catch up with the joining machine main body 10.

Due to this speed increase, the succeeding sheet par 6' passes through the joining unit 1 through the introduction guide member 27 in the same way as the preceding note par 6.
5'. Then, when the tip comes out from the joining unit 15', the upper clamp electrode 21' is lowered and is clamped with the lower clamp electrode 20'. Thereafter, the joining cylinder 17 is driven to move the joining unit 15' and adjust the distance between the two seat bars 6 and 6' to an extra dimension (7 mm with a thickness of 300 mm).
- set to about 10m18 (at a distance of about 18m) at the top, and flash butt welding is performed by supplying current from the power source 22.

After welding, the rain clamp electrodes 21 and 21' are respectively raised to open the seat bar 6.6', the upper pinch roll 32 is also raised, and the welding machine body is returned to its original position by 1°.

The present invention has the above-mentioned configuration and function, and since the welding machine main body 10 moves above the table roller 3, there is no need to raise and lower the table roller 3 as in the conventional case.

A fixed type can be used, equipment costs are low, and breakdowns are less likely to occur.

Further, since the introduction guide member 27 is provided at an angle on the introduction side of the welding machine main body 10, the sheet bar 6 can be introduced smoothly along with the table rollers 3.

[Brief explanation of the drawing]

FIG. 1 is a layout diagram showing a conventional hot rolling line. FIG. 2 is a side view showing the main parts of flash butt welding, FIG.
The figure shows a rear view, and FIG. 6 shows a schematic diagram of the joining operation sequence. In Figure 1, 2 is a rough rolling mill group, 5 is a table roller, 4 is a finishing rolling mill group, 10 is a welding machine main body, 15°15' is a welding unit), 20.20' is a lower clamp electrode, 21. 2
1' is the electrode that also serves as the upper clamp. 27 is an introduction guide member. Applicant: Kawasaki Kuutetsu Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] Above the table rollers installed between the rough rolling mill group and the finishing rolling mill group, there are two built-in joining units with electrodes that can be used for both upper and lower clasps, and the joining machine body runs on the main body of the joining machine, which is equipped with an introduction guide member that is slanted toward the introduction side. Online joining equipment for hot rolled materials #, a characterized by being freely installed