JPS6253246B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a roll changing device for a leveling roll for a tension leveler.

Generally, hot-rolled and cold-rolled rimmed steel metal strips do not have uniform mechanical properties in the width direction.
During flattening, an ear wave occurs at the end of the strip where the yield point is low, but this problem occurs when the center part has the same diameter and the outside diameter of the roll at the part that abuts the rim layer at the end of the strip is directed toward the shaft end. It has been confirmed that this problem can be solved by using a tapered roll whose diameter is gradually reduced.

In addition, the strips to be leveled are generally formed by welding together many types of strips with different widths, and are continuously straightened using a tension leveler.
As shown in FIG. 1, it is necessary to prepare leveler rolls suitable for each board width, and to sequentially replace and use these rolls during processing operations.

The present applicant has previously proposed a leveling roll in a standby position, which is received on a roll pedestal, among the leveling rolls that are held in and out of contact with two sets of bearing arms, as a roll changing device for a leveling roll for a tension leveler. We have developed and proposed a roll changing device that pulls out the leveling roll, inserts and sets the leveling roll prepared outside the machine into the machine during leveling work, and then moves it to the use position by swinging the bearing arm.

In this proposed device, the distance between the roll pedestal located directly under the strip being threaded and the strip being threaded is
Because the used rolls are manually removed from the roll cradle and inserted into the roll cradle under conditions where there are few Great care had to be taken when removing and inserting the roll into the roll holder to avoid accidents.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and includes two sets of bearing arms each having a bearing part for the leveling roll at the tip end so that the bearing part can rotate to just below the operating position of the leveling roll. A roll pedestal is provided on the outside of the two sets of bearing arms, and a common frame fixed to the bearing arm and the roll pedestal is provided so as to be movable up and down. One base is slidably, rotatably, and detachably supported by the boss part of the operating body of the bearing arm, so that when the engagement is released, the bearing part of the bearing arm rotates downward about the boss. The present invention aims to provide a roll changing device characterized in that a series of auxiliary roll pedestals are provided on the side of the base of one of the bearing arms so as to be retractable downward. be.

Examples thereof will be described below with reference to the drawings. Figure 2 shows an example of the roll arrangement of a basic four-stage leveler for a tension bending straightening machine. Figure 1 shows a leveler in which the strip plate 2 has tapered parts at both ends that gradually become smaller in diameter toward the outer end. The rolls 2' are straight rolls, 4 and 4' are back up rolls, and 5 and 5' are bridle rolls. Backup Prowl 4,
4' supports the leveling rolls 2, 2' and serves to prevent their deflection.

The leveling roll 2 in the use position and the leveling roll 2A in the standby position have two sets of bearing arms 6, 6' at both ends, as shown in FIGS. 3 to 5.
7 and 7' in a detachable manner. Both bearing arms 6, 6', 7, 7' are supported by support pins 9, 9', 10, 1 which are pivotally supported on a lower frame 8 which can move up and down.
0'. 11
and 12 are spur gears that act as operating bodies for the bearing arms 6 and 7; both spur gears 11 and 12 support pins 9 and 10;
The boss part 1 is rotated and held in the upper position.
The base tubes 15 and 16 of the bearing arms 6 and 7 are fitted into the base tubes 3 and 14 so as to be slidable and rotatable in the axial direction. 17 and 18 are on the opposing surfaces of the spur gear 11 and the base tube 15, and on the opposite surfaces of the spur gear 12 and the base tube 16.
The engaging portions formed on the surfaces facing each other are shown.
19 and 20 are fixing knobs that maintain the engaged state of the engaging parts 17 and 18; 21 and 22 are bearing arms 6 and 7;
Ball grips 11' and 1 for pushing and pulling
2' is a spur gear fixed to bearing arms 6' and 7'. 23, 23' are spur gears 11, 11', 12,
12' and is fixed to a drive shaft 24 rotatably supported on the lower frame 8,
The bearing arms 6, 6', 7, 7' are simultaneously rotated via the pinions 23, 23' and the spur gears 11, 11', 12, 12' in conjunction with the forward and reverse rotation of the manual handle 25 or a suitable drive device. The structure is such that they swing in the same direction as shown by the solid line or the two-dot chain line (see FIG. 3). 26, 27 are bearing arms 6,
With roll holders provided on both sides of 6', 7, 7',
A rolling wheel 28 is installed in each of the receiving parts of both the supporting stands 26 and 27.
is installed. 29 is a gear meshed with the pinion 23, a protrusion 30 is attached to the side surface of the gear 29, and a bolt 31 attached to the frame 8,
31' to restrict the swing end position of the bearing arms 6, 6', 7, 7'. 32 is a lock pin that restrains movement of the bearing arm at the leveling roll use position. 33 and 34 are provided on the sides of the bearing arms 6 and 7 with the roll pedestals 26,
The auxiliary roll cradle is arranged at the same height as a series of 27, and the pedestal is shown attached to the lower frame 8 with a link device so that it can be extended and folded in the figure. It may be separated and placed. In the case of auxiliary roll holders to be stored separately, one auxiliary roll holder may be used for both roll holders. Reference numeral 35 is a wheel provided at the receiving portions of the auxiliary roll holders 33 and 34. 36 shows a roll fall prevention frame in front view.

The configuration of the present invention is as described above, and in order to exchange the leveling roll 2 in the use position with the leveling roll 2A in the standby position, first, the lower frame 8 is moved down from the pass line, and then the lock pin 32 is When the drive unit 25 is rotated and the bearing arms 6, 6', 7, and 7' are rotated as shown by the two-dot chain line in FIG. The leveling roll 2A, which was sent onto the roll pedestal 26 and was at the same time waiting on the left roll pedestal 27 while being engaged with the bearing arms 7, 7', is transferred to the use position, and the intermediate roll or back-up roll 4 After supporting the bearing arm, the locking pin 32 is inserted to restrain the bearing arm. Thereafter, the lower frame 8 is moved upward and positioned at the pass line, completing the roll replacement work.

In this way, two types of leveling rolls 2 and 2A are set in the machine, and when these rolls are selectively used, the vertical movement of the lower frame 8 and the movement of the bearing arms 6, 6', 7, and 7' are controlled. Roll replacement can be performed quickly by simply performing rocking without causing any sliding scratches on the roll.

Next, we will explain how to newly insert and set a roll prepared according to the board width.

First, regarding the bearing arm 7 at the standby position, operate the knob 20 to release the engagement of the engaging portion 18, and then grasp the ball grip 22 and pull out the bearing arm 7. When the bearing arm 7 is released by its own weight, it rotates downward as shown by the dashed line in FIG. 3, and the roll pedestal 27 is opened in the direction of the roll axis. Next, the roll 2 on the roll pedestal 27
A is extracted using the auxiliary roll holder 34, and a new roll is inserted from the auxiliary roll holder 34 onto the roll holder 27. Thereafter, the bearing arm 7 is rotated upward and pushed in the direction of the axis of the pin 10 to engage the engaging portion 18 and engage the bearing arm 7 with the end of the roll shaft. After that, when the roll is fixed with the knob 20, a new roll is set on standby inside the machine. The roll insertion/removal operation on the roll pedestal 26 side is also the same as described above. This roll insertion/removal operation is performed during leveling work, and this work can be performed safely by using an auxiliary roll holder. After in-flight setup,
By swinging the bearing arms 6, 6', 7, and 7' in the same way as the roll replacement procedure described above and moving this roll to the use position, you can quickly install a new roll when lowering the lower frame. Since the rolls can be exchanged, the amount of non-levelling in the strip during continuous processing can be minimized.

Since the present invention has the above-described structure and operation, various types of leveling rolls prepared outside the machine according to the width and material of the strip to be straightened are placed in front of the machine during leveling work. In addition, the amount of non-levelling of the strip plate can be greatly reduced by synergistically with the swinging movement of the bearing arm. Since it is used in combination, there is a great effect that there is no accident of contact between the strip during threading and the roll during insertion/removal.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the relationship between the strip width and the leveling roll, FIG. 2 is a schematic diagram showing the basic roll arrangement of the leveler, and FIG. 3 is a front view of the roll changing device according to the present invention. FIG. 4 is a side view taken along the line in FIG. 3, and FIG. 5 is a plan view. 2,2A...Leveling roll, 6,6',
7, 7'... Bearing arm, 11, 12... Spur gear (operating body), 13, 14... Boss portion, 15, 16...
...Bearing arm base cylinder, 17, 18...Engagement part, 2
6, 27... Roll cradle, 33, 34... Auxiliary roll cradle.

Claims (1)

[Claims] 1 In a tension leveler, two sets of bearing arms each having a bearing part for the leveling roll at the tip end thereof are provided so that the bearing part can rotate to just below the operating position of the leveling roll, and the outer side of the two sets of bearing arms is provided with a roll pedestal, and furthermore, a common frame fixed to the bearing arm and the roll pedestal is provided so as to be movable up and down, and one base of each set of the bearing arms is connected to the operating body of the bearing arm. The bearing arm is slidably, rotatably, and removably supported by a boss portion of the bearing arm, and when the bearing arm is disengaged, the bearing portion of the bearing arm rotates downward about the boss, and
A roll changing device characterized in that an auxiliary roll pedestal is provided on the side of the one base of the bearing arm in a series with respect to the roll pedestal so as to be retractable downward.