JP2503156Y2 - Separator roll reduction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a separator roll reduction device applied to a non-bare trim or slit of a metal strip in a side trimmer, a slitter, or the like.

<Prior Art> Trimming of the edge portion of a metal strip (hereinafter referred to as a strip) or division in the strip width direction is cut by a trimming device or the like. In this cutting, the strip is first cut with a side trimmer or slitter. Incomplete shearing is performed by means of a separator roll, and the sheared portion is pressed down and separated to perform so-called burr-free cutting.

FIG. 5 is a block diagram showing the concept of an example of the trimming device having the above-mentioned side trimmer, FIGS. 6 and 7 are explanatory views showing the operation of the burr-free cutting, and FIGS.
It is explanatory drawing explaining the effect | action of the principal part of a figure.

As shown in FIG. 5, both edge portions of the strip S supplied from the previous step are incompletely sheared by the side trimmer 10 leaving about 0.3 times the plate thickness t as shown in FIG. As shown in FIG. 7, the separator rolls 11 and 12 sandwich the sheared portions at both edges and press them down to separate the strips S ₂ from the strips S so that burr does not occur.
At this time, set the upper separator roll 11 to the screw jack 13
Is moved up and down to adjust the roll gap between the upper separator roll 11 and the lower separator roll 12 to a value slightly smaller than the plate thickness t, and the hydraulic pressure of the hydraulic device 16 and the pressure reduction cylinder 14 and the lower pressure controlled by the switching valve 15. The shearing portion is pressed down by the separator roll 12.

The scrap S ₁ generated by this trimming is fed to the scrap chopper 22 to be cut into short scraps S _2, which are dropped and stored in a bag (not shown) below.

When trimming is performed by such a device, the strip S to be trimmed becomes thicker or thinner due to the welding connection. However, the plate thickness after welding tw is larger than the plate thickness t before welding of the strip S. When it becomes, it becomes as follows. That is, as shown in FIG. 8, the pressure is temporarily stopped before the plate thickness becomes tw, the pressure reducing cylinder 14 is made pressure free by the switching valve 15, and the upper separator roll 11 is raised by the screw jack 13 to make the roll gap g. Adjust to a value slightly smaller than the plate thickness tw. Next, as shown in FIG.
When the strip S is made to travel by switching to the pressure reducing state by 15 and the connecting part Sw is sandwiched by the upper and lower separator rolls 11 and 12, the pressure reducing state as shown in FIG. 10 is obtained.

When a connecting portion having a plate thickness t smaller than the plate thickness tw comes during the rolling reduction, as shown in FIG. 11, the strip S is temporarily stopped before the connecting portion Sw and the rolling cylinder 14 is pressure-free. When the gap 8 is adjusted by lowering the upper separator roll 11 by the difference in plate thickness, the lower separator roll 12 is also lowered accordingly.

Next, the compression cylinder 14 is brought into a compression state and the strip S
When the upper separator roll 11 and the lower separator roll 11 and 12 sandwich a portion having a small plate thickness t, the lower separator roll 12 is automatically raised by the reduction force of the reduction cylinder 14 to be in a reduced state.

<Problems to be Solved by the Invention> When the strip plate thickness changes from t to tw in trimming of the strip described above, in other words, when welding is performed from a thin strip to a thick strip, before the connecting portion Sw. From this temporary stop position to the connection part Sw, the separator roll does not press down the incomplete sheared part by the side trimmer and cannot be separated automatically, so if it can be separated manually I won't.

For this reason, an extra worker is required, and it becomes a factor that hinders automation of the line.

It is an object of the present invention to provide a separator roll pressing device that can automate a line without requiring a worker.

<Means for Solving the Problems> The present invention that achieves the above-mentioned object is made up of an upper roll equipped with a roll gap adjusting device and a lower roll equipped with a reduction cylinder which are arranged on the exit side of a side trimmer or slitter. In this separator roll, a pressure reduction cylinder is provided between the upper roll and the roll gap adjusting device, and pressure reduction means is provided in the pressure reduction cylinder.

<Operation> Even if the strip thickness at the connecting portion increases and the roll gap adjusting device is moved to widen the roll gap by the above-described configuration, the upper roll is automatically moved up and down by the pressing cylinder to constantly strip the strip. It can be kept in a pressed state, leaving no part of the incompletely sheared part.

<Embodiment> An embodiment of the present invention will be described with reference to FIGS. 1 to 4. The same parts as those in FIG. 5 are designated by the same reference numerals. FIG. 1 is a side view showing the concept of a side trimmer and its accessory, and FIGS. 2 to 4 are side views for explaining the action of the separator roll of FIG. In FIG. 1, 11 is an upper separator roll, 12 is a lower separator roll,
It is arranged on the exit side of the side trimmer 10. Of these, a pressure reduction cylinder 14 is attached to the lower separator roll 12, and the pressure reduction cylinder 14 is connected to a hydraulic device 16 via a switching valve 15. Further, a scrap chopper 22 is arranged on the exit side of the upper and lower separator rolls 11 and 12 via a chute 21.

The upper separator roll 11 is connected to the screw jack 13, but in the present embodiment, the upper and lower cylinders 1 are provided between the upper separator roll 11 and the screw jack 13.
The upper and lower cylinder 1 is connected to a hydraulic device 4 via a relief valve 3 and a switching valve 2.

Next, to explain the operation, as shown in FIG. 1, both edge portions of the strip S supplied from the previous step are incompletely sheared by the side trimmer 10, and the upper separator roll 11
The roll gap between the lower separator roll 12 and the lower separator roll 12 is adjusted to a value slightly smaller than the plate thickness t by the screw jack 13, and the lower separator roll 12 is raised by the pressing cylinder 14 to set the upper portion thereof to the pass line L and the upper separator. The roll 11 is lowered by the upper pressing cylinder 1, and the incomplete shearing portion is pressed to separate the scrap S ₁ . Further, the pressing force of the pressing cylinder 14 is larger than the pressing force of the upper pressing cylinder 1, and the height thereof does not change even when the pressing force is applied by the upper pressing cylinder 1.

When trimming a strip having a uniform plate thickness, incomplete shearing by the side trimmer 10 and separation of the scrap S ₁ by the upper separator roll 11 and the lower separator roll 12 are performed, and this scrap S ₁ is shot 21 Short scrap S ₂ supplied to scrap chopper 22 via
It is cut into pieces and dropped into a bag (not shown) below to store them.

When the thickness of the succeeding material strip is thicker than the thickness of the strip S being cut, when the connecting portion Sw by welding of the strip S comes as shown in FIG. 2, the traveling of the strip S is temporarily stopped in front of it. Then, the pressure reducing cylinder 14 of the lower separator roll 12 is made pressure free by the switching valve 15, the pressure reduction of the strip S is released, and the upper pressure reducing cylinder 1 and the upper separator roll 11 are raised by the screw jack 13.
The roll gap g is set to a value slightly smaller than the thick plate thickness tw. In this case, the reason why the pressure of the lower pressure lowering cylinder 14 is made free is to reduce the load of the roll gap adjusting motor. Next, as shown in FIG. 3, the switching valve 15 is operated to apply pressure to the pressure reducing cylinder 14 to set the lower separator roll 12 on the pass line L, and the switching valve 2 is operated to apply pressure to the upper pressure reducing cylinder 1. , The strip S is advanced by the upper separator roll 11 and is advanced.

In this case, the relief pressure is set in advance in the relief valve 3, and the upper and lower separator rolls 11 and 12 are moved to the fourth strip from the thin strip of the preceding machine to the thick strip of the trailing machine.
When the connection part Sw is clamped as shown in the figure, the upper and lower cylinder 1
Is smaller than the pressing force of the pressure reducing cylinder 14, the upper separator roll 11 automatically rises, and when the pressure in the upper pressure reducing cylinder 1 rises, the relief valve 3 is activated and discharged, and the pressure exceeds a predetermined pressure. I try not to become.

Next, as shown in FIG. 1, the switching valve 2 of the upper pressure reducing cylinder 1
Is changed to a rising state and the upper separator roll 11 is lifted to change the roll gap g to the strip thickness of the trailing machine.
The value is slightly smaller than tw, and normal separator roll operation is performed.

As shown in FIG. 11, when the strip thickness of the trailing machine is smaller than the strip thickness of the preceding machine, the connecting portion Sw may be continuously pressed and separated in the same manner as the operation of the conventional device. it can.

<Effects of the Invention> As described in detail above, in the present invention, the pressure reducing cylinder is provided between the roll above the separator roll and the gap adjusting device, and the pressure adjusting means is provided in the pressure reducing cylinder, so that the connecting portion is provided. Even if the plate thickness of the strip increases, the upper roll automatically moves up and down, so that the strip can be constantly kept in a pressed state. Therefore, since the incompletely sheared portion of the strip thickness increasing portion (connection portion) of the strip can be continuously and reliably cut off, the operator is not required and the line can be automated.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a conceptual configuration diagram of a trimming device, FIGS. 2 to 4 are operation explanatory diagrams of a reduction cylinder and a separator roll, and FIGS. FIG. 11 shows a conventional example, FIG. 5 is a conceptual configuration diagram of the conventional example, FIGS. 6 and 7 are explanatory views showing shearing and cutting, and FIG.
FIG. 11 to FIG. 11 are explanatory views of the action of the separator roll. In the figure, 1 is an upper pressure reducing cylinder, 2 is a switching valve, 3 is a relief valve, 4
Is a hydraulic device, 10 is a side trimmer, 11 is an upper separator roll, 12 is a lower separator roll, 13 is a screw jack,
Reference numeral 14 is a reduction cylinder, 15 is a switching valve, 16 is a hydraulic device, S is a strip, and Sw is a connecting portion.

Claims (1)

(57) [Scope of utility model registration request] 1. A separator roll comprising an upper roll equipped with a roll gap adjusting device and located on the exit side of a side trimmer or slitter and a lower roll equipped with a reduction cylinder, wherein the upper roll and roll gap adjustment are performed. A pressure reducing device for a separator roll, characterized in that a pressure reducing cylinder is provided between the pressure reducing cylinder and the device, and pressure reducing means is provided in the pressure reducing cylinder.