JPS625860B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention makes it possible to uniformly wind each metal band when winding it onto a single recoiler drum after dividing a wide long metal band into multiple metal bands using a slitter. The present invention relates to a pressurizing method that can be applied easily and causes almost no damage.

The thickness of a wide metal strip is allowed to vary by several percentage points according to the standard, but even for a single coil, there is a slight difference in thickness between the center and the ends.

Therefore, if a multi-slit metal strip is directly wound onto a single recoiler drum, the thinner portions of the coil may be wound loosely and lose their shape. To prevent this, in conventional slitter devices, a device that provides back tension is provided in front of the recoiler drum to keep the winding tension constant. However, the difference in the thickness of the metal strip causes a difference in the diameter of the wound coil. A coil with a small diameter requires less winding than a coil with a large diameter, so it will loosen before the one that provides back tension. In order to deal with this loosening of the metal strip, conventional slitter devices require a large space or something to restrict the direction of movement.

To explain this with reference to FIG. 1 which shows an example of a conventionally used slitter device, 1 is an uncoiler drum for mounting a wide metal coil 2, 3 is a slitter for dividing 2, 4 is a tension pat, 5 is a tension roll, and 4 and 5 generate tension for winding. 6 is a recoiler drum for winding, and 7 is a wound coil. Now, the wide metal strip 2 is divided into multi-strip metal strips by the slitter 3, passes through the tension pad 4 and the tension roll 5, and is divided into 1
When the metal strips are wound around the recoiler drum 6, the diameters of the coils 7 are different due to the difference in the thickness of the metal strips. , the amount of winding becomes smaller. Since each metal strip is given back tension by the tension pad 4 and the tension roll 5, a metal strip that is wound up with a small amount causes loosening between the slitter 3 and the tension pad 4. Therefore, the floor surface was dug down for a considerable length to prevent the loose metal strip from coming into contact with the floor surface. Also, depending on the material of the metal band, the tension pat 4 may be made of wood, felt, or other materials, but it requires a certain degree of high pressure, and the tension pat is usually several hundred millimeters wide, and the tension pat must be passed between them. There is also a risk of scratches in the case of plated or surface-treated metal strips.

The invention of the present application eliminates the above-mentioned drawbacks, and even if there is a slight change in the thickness of the divided metal strip, it can be wound up uniformly and without damage. The pressurizing method will be explained with reference to FIGS. 2 and 3. 8 and 9 are metal rolls coated with a resin having appropriate hardness and lubricity, and are rotated at a constant speed by a gear box 11. The roll 9 is a movable bearing so that it can be pressed against the roll 8 by a pressure device 10. 12 is a brake for controlling the rotation of the rolls 8 and 9 and arbitrarily changing the circumferential speed of the rolls. 13 is a metal band speed detector, 14 is a roll circumferential speed detector, and the ratio between the metal band speed and the roll circumferential speed is indicated by a speed ratio meter 15. 16 is a guide roller.

Now, the multi-striped metal strip 7 is divided by the slitter 3.
When the material is passed linearly between the rolls 8 and 9 and wound onto the recoiler drum 6, the speed of the slitter 3 and the winding speed of the recoiler drum 6 are made the same, and the pressure device 10 is used to properly control the roll 9. If the brake 12 is applied so that the circumferential speed of the roll is several percent slower than the speed of the metal strip while checking the indication on the speed ratio meter 15, each metal The strip is given winding tension while slipping between rolls 8 and 9. Furthermore, if the pressure applied to the roll and the speed ratio between the speed of the metal strip and the circumferential speed of the roll are set to appropriate values, the metal strip with a large winding coil diameter will become the metal strip with a small winding coil diameter. The amount of slip becomes larger, and the difference in speed of each metal strip caused by the diameter of the winding coil, that is, the amount of winding can be absorbed by the difference in the amount of slip.
In addition, since the roll has slipperiness and the contact surface between the roll and the metal strip is so small that it approaches a line contact, and the amount of slip is small, almost no scratches occur.

Next, to explain an example of a steel strip, rolls 8 and 9 are metal rolls with a diameter of 480 mm coated with white neoprene having a hardness of about 70 degrees and a coefficient of friction of about 0.3% to a thickness of 17 mm. , roll 9
The pressure is approximately 2 tons, and when an internal air brake 12 is attached to the gear box 11 and a multi-filament steel strip made by dividing a wide steel strip with a nominal thickness of 0.3 mm with a slitter is rolled, the roll circle is Adjust the air brake pressure to approximately -3.0% for the peripheral speed ratio.
At 2.5Kg/cm ² , the winding coil diameter is approximately 10mm.
Even when there was a difference in the length, there was no loosening in any part, and the winding was almost uniform. When the thickness of the steel strip increases, it is effective to increase the speed ratio of the roll circumferential speed to the steel strip speed.
Good results were obtained with a steel strip of -4.5%.

In conventional slitter devices, looseness always occurs between the slitter and the part that applies winding tension, so a space to handle this looseness and something to restrain the direction of movement are required. However, in the slitter device using the pressurizing method of the present application, even if there is a difference in the diameter of the winding coil of each divided metal strip, there is no loosening between the slitter 3 and the rolls 8 and 9, so the slitter 3 can be introduced linearly into the rolls 8, 9. Therefore, the total length of the slitter device can be reduced by almost half compared to conventional devices.

As described above, the present application is based on a new idea of appropriately slipping a slitted multi-thread metal strip between slippery pressure rolls and uniformly winding it onto a single drum, which is easy to implement, and Since the installation space can also be reduced, this has great benefits in terms of efficient use of the interior of the factory.

[Brief explanation of the drawing]

FIG. 1 is a side view schematically showing a conventional slitter device, FIG. 2 is a perspective view of a pressurizing section of an embodiment, and FIG. 3 is a side view showing the arrangement of the embodiment. Code, 1...Uncoiler drum, 2...Wide metal coil, 3...Slitter, 4...Tension pat, 5...Tension roll, 6...Recoiler drum, 7...Wound coil, 8...
... Roll, 9 ... Roll, 10 ... Pressure device, 1
1...Gearbox, 12...Brake, 13...
...Metal band speed detector, 14...Roll circumferential speed detector, 15...Speed ratio meter, 16...Guide roller.

Claims (1)

[Claims] 1 In a slitter device that divides a wide long metal strip, between the slitter and the recoiler drum,
Two metal rolls coated with a resin with appropriate hardness and lubricity are pressed together under appropriate pressure, rotated at a constant speed using gears, etc., and the circumferential speed of the rolls can be freely controlled using a brake. When the multi-striped metal strip passes through the pressure contact part of both rolls and is wound onto one drum, the circumferential speed of the roll is reduced by a few percent with respect to the speed of the metal strip, and the slitter speed and winding speed are be the same,
When each divided metal strip passes through the pressure contact part of both rolls, it slips according to its thickness to absorb the difference in the amount of winding. Pressure method for winding.