JPS6121125Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement in the drive system of a tension roller leveler using a work roll forced drive system.The purpose of this invention is to reduce the speed difference that occurs between the roll surface and the strip. The purpose is to prevent roll marks on the strip due to roll slips.

A number of metal bands (hereinafter referred to as strips) are continuously and repeatedly bent while applying tension, thereby causing plastic elongation of approximately 0.1 to 1.5% to correct the flatness of the strip. Such tension roller levelers are conventionally known.

As shown in FIGS. 1 and 2, this tension roller leveler has an entrance bridle roll group 2.
, an exit bridle roll group 3, and a work roll group 4 arranged vertically in a staggered manner between the entrance and exit bridle roll groups 2 and 3,
The entrance bridle roll group 2 is a gear transmission 10a.
The exit bridle roll group 3 is linked to the bridle roll drive shaft 7 via a gear transmission 10b.
is interlocked with the bridle roll drive shaft 9 via
The entry and exit bridle roll drive shafts 7 and 9 are connected to a bridle roll drive source (not shown) to create a predetermined peripheral speed difference between the entry bridle roll group 2 and the exit bridle roll group 3. let

Improved work roll 4 of leveler using forced drive system
is driven by a single drive motor 8 via a universal spindle 5 and a pinion nest 6.

A difference in roll circumferential speed is given between the inlet bridle roll 2 and the outlet bridle roll 3 of the tension roller leveler having the above structure, tension is generated in the strip 1 wound around the strip 1, and under this tension, the leveler Strip 1 by work roll group 4
The strip 1 is subjected to continuous repeated bending to produce the required plastic elongation along the traveling direction of the strip 1, thereby achieving the purpose of flattening the strip 1.

The relationship between the tension value of the strip and the number of times the strip is bent by the work roll is such that as the number of times the strip is bent increases, the amount of plastic elongation increases under a constant tension. A work roll 4 is used.

On the other hand, there are many examples of non-drive type levelers that do not forcefully drive the work rolls 4, but when leveling is performed at high speed or with a wet type,
If the work rolls of the leveler are not driven, a so-called roll slip occurs in which the roll circumferential speed does not follow the strip speed, damaging the strip surface, so usually measures are taken to forcibly drive the work rolls 4.

In a conventional tension roller leveler in which the work rolls 4 are forcedly driven, each work roll 4 is driven by a single driving electric motor 8 via a pinion nest 6, as shown in FIG. Therefore, it is necessary to adopt a configuration in which the circumferential speed of all the work rolls 4 is constant, and as a result, when a predetermined elongation rate is given to the strip 1, at the entrance and exit of the leveler,
Since the speed of the strip 1 varies in proportion to the amount of elongation, roll slips will occur depending on the set elongation rate, which will damage the surface of the strip 1.

This invention was made to solve such problems, and the gist is as shown in FIGS. 3 and 4, the work roll group 4 of the leveler
are divided into two groups 4a and 4b at the point where the elongation rate of the strip 1 is approximately half of the set value, and the work roll group 4 on the side near the leveler entrance is connected to the universal spindle 5a, pinion nest 6a,
Continuously variable transmission 13a and leveler interlocking gear device 11
a, 12a to the entry side bridle roll drive shaft 7, and the other work roll group 4b near the leveler exit is connected to the universal spindle 5b, pinion nest 6b, continuously variable transmission 13b, and leveler interlocking gear device 11b, 12b. It is connected to the exit side bridle roll drive shaft 9 via.

With this configuration, strip 1
The amount of roll slip on the work rolls 4a, 4b does not exceed approximately half of the set elongation rate.

Further, the work roll group 4a near the leveler entrance has a rotation speed linked to the rotation speed of the bridle roll 2 on the leveler entry side, and the work roll group 4b near the leveler exit has the rotation speed of the bridle roll 3 on the leveler exit side. Since the rotational speed is obtained in conjunction with the speed, each work roll group can obtain a speed corresponding to the circumferential speed of each work roll, that is, the speed at the entrance and exit sides of the strip. In particular, the speed of the bridle roll is normally controlled in accordance with the elongation rate of the strip, and by interlocking the bridle roll and the work roll, the circumferential speed of the work roll can be made to follow the speed of the strip.

Furthermore, the continuously variable transmissions 13a and 13b have the role of matching the circumferential speed of the work roll to the speed of the strip 1 in response to changes in the diameter of the work roll due to wear, for example. However, this device is designed so that it can be used even if the device is not used.

FIGS. 5 and 6 show an embodiment in which a roll configuration is different from that of the embodiment described above, and in the figures, parts having the same effect as those of the embodiment described above are designated by the same reference numerals. In this embodiment, the large-diameter roll 4d of the work roll group disposed near the leveler exit is not driven, but this roll has a large diameter and has a wide contact surface with the strip 1, so that the contact surface is wide. Since the pressure is small, if a rubber lining or the like is applied to the roll surface, even if a roll slip occurs, the strip will not be damaged.

The example shown here is just one example, and the work roll interlocking system of the leveler may be arbitrarily changed without departing from the gist of the present invention as stated in the claims for utility model registration. It is.

Since the present invention has the above-described structure and operation, it is possible to greatly reduce roll slips and is extremely effective in preventing roll marks caused by roll slips.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a tension roller leveler using a conventional work roll drive system, Fig. 2 is a side view taken from A to A in Fig. 1, and Fig. 3 is a plan view of a tension roller leveler according to the present invention. Figure 4 is B in Figure 3.
-B is a side view, FIG. 5 is a plan view showing a modified embodiment, and FIG. 6 is a side view from C to C in FIG. 1... Strip, 2... Inlet bridle roll group, 3... Outlet bridle roll group, 4 (4
a, 4b, 4c, 4d)...work roll, 5
(5a, 5b, 5c)... Universal spindle, 6 (6a, 6b)... Pinion nest, 7...
...Enter side bridle roll drive shaft, 9...Output side bridle roll drive shaft, 10a, 10b...Gear transmission, 11a, 11b, 11c, 12a, 12
b...Leveler interlocking gear device, 13 (13a, 13
b, 13c)...Continuously variable transmission.

Claims (1)

[Scope of utility model registration request] In a work roll forced drive type tension roller leveler, the front work roll group, which handles about half of the set elongation of the strip, is connected to the drive shaft of the entry side bridle roll group via a continuously variable transmission, and A tension roller leveler characterized in that a work roll group is connected to a drive shaft of an exit bridle roll group via a continuously variable transmission.