JPS6253245B2 - - 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.

In general, hot-rolled and cold-rolled rimmed steel metal strips do not have uniform mechanical properties in the width direction, and when flattening, ear waves occur at the edges of the strip where the yield point is low. It has been confirmed that this problem can be solved by using a tapered roll in which the center part has the same diameter and the outer diameter of the part of the roll that contacts the rim layer part at the end of the strip gradually decreases toward the shaft end.

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. It is necessary to prepare suitable leveler rolls and to sequentially replace and use these rolls during processing operations.

The present applicant has previously developed a roll changing device for a tension leveler that moves leveling rolls held by two sets of bearing arms between a use position and a standby position by swinging the bearing arms. developed and proposed.

This proposed device has two strips to be leveled.
This method is suitable for strips with different widths, but in the case of strips with three or more widths, the rear strip cannot be leveled. Therefore, it is conceivable to take out the rolls waiting inside the machine, then load the rolls prepared outside the machine and transfer them to the use position, but it takes time to assemble them to the bearing arm in the standby position, and during transfer The strip had the drawback of producing a large non-levelled area.

Also, during leveling work with the leveler roll at the use position, if you try to change the set of the roll at the standby position with the roll outside the machine, contact with the strip plate being threaded during disassembly/assembly of the bearing arm, etc. There is danger involved.

The present invention was made in order to eliminate the above-mentioned drawbacks, and it is possible to make two sets of bearing arms each having a bearing part for the leveling roll at the tip thereof, so that the bearing part can rotate to a position directly 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 to be movable up and down. One base of each set is slidably, rotatably, and detachably supported by the boss part of the operating body of the bearing arm, and when the engagement is released, the bearing part of the bearing arm rotates downward about the boss. It is an object of the present invention to provide a roll changing device characterized by the following features.

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, where 1 is a strip plate, 2
2 is a leveling roll having tapered portions with a diameter gradually decreasing toward the outer end, 2' is a straight roll, 4 and 4' are back-up rolls, and 5 and 5' are bridle rolls. The back up rolls 4, 4' serve to support the leveling rolls 2, 2' and 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, and the spur gears 11 and 12 are connected to the support pins 9 and 1.
The base tubes 15 and 16 of the bearing arms 6 and 7 are fitted into the boss portions 13 and 14 so as to be slidable and rotatable in the axial direction. 17 and 18 are located on the opposing surfaces of the spur gear 11 and the base tube 15, and are also attached to the spur gear 12 and the base tube 1.
Fig. 6 shows the engaging portions formed on the surfaces facing each other. 19 and 20 are fixing knobs for maintaining the engaged state of the engaging parts 17 and 18; 21 and 22 are ball grips for pushing and pulling the bearing arms 6 and 7; 11'
and 12' are spur gears fixed to the bearing arms 6' and 7'. 23, 23' are spur gears 11, 11',
12, 12', and is fixed to a drive shaft 24 that is rotatably supported on the lower frame 8, and is linked to the forward and reverse rotation of a manual handle 25 or an appropriate drive device, and is connected to the pinions 23, 23'. The structure is such that the bearing arms 6, 6', 7, 7' simultaneously swing in the same direction as shown by the solid line or the dashed-dotted line through the spur gears 11, 11', 12, 12' (see Fig. 3). ). Reference numerals 26 and 27 refer to two sets of roll pedestals provided on both sides of the bearing arms 6, 6', 7, and 7', and rolling wheels 28 are installed in the receiving portions of both pedestals 26 and 27. 29 is a gear meshed with the pinion 23, a protrusion 30 is attached to the side surface of the gear 29, and bolts 31, 3 attached to the frame 8 are attached.
1' to restrict the swing end position of the bearing arms 6, 6', 7, 7'. Reference numeral 32 indicates a lock pin that restrains the movement of the bearing arm when the leveling roll is in use.

The configuration of the present invention is as described above, and in order to replace the leveling roll 2 in the use position with the leveling roll 2A in the standby position, first,
After the lower frame 8 has been moved down from the pass line, the lock pin 32 is pulled out and the drive device 25 is rotated to rotate the bearing arms 6, 6', 7, and 7' as shown by the two-dot chain line in FIG. The leveling roll 2, which is in the use position due to the movement, is placed on the roll holder 26 on the right side of the figure.
At the same time, the leveling roll 2A, which had been kept on the left roll pedestal 27 while being engaged with the bearing arms 7, 7', was transferred to the use position and supported on the intermediate roll or back-up roll 4. rear,
Insert the locking pin 32 to restrain the bearing arm. Thereafter, when the lower frame 8 is moved upward and positioned at the pass line, the roll replacement work is completed.

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. Rolls can be replaced quickly without damaging the rolls simply by swinging the rolls.

Next, we will explain how to newly insert and set a roll prepared according to the board width. First, regarding the bearing arm 7 in 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.
2 and the shaft end of the roll 2A, the bearing arm 7 rotates downward under its own weight 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 2A on the roll pedestal 27 is pulled out, and a new roll is inserted onto this pedestal. After that, 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 the bearing arm 7 and the end of the roll shaft, and then the knob 20
If you fix it with , a new roll will be set on standby in the aircraft. Incidentally, the roll insertion/removal operation on the roll pedestal 26 side is also performed in the same manner as described above.

Thereafter, the bearing arms 6, 6', 7, and 7' are swung in the same manner as the roll replacement procedure described above to move this roll to the use position, thereby completing the roll replacement with a new roll.

In addition, in the present invention, various operations of the bearing arm for setting the roll in the machine and the operation of replacing the roll on the roll pedestal can be performed in parallel with the leveling work, so that the lower frame can be moved down without any delay. The rolls can be replaced.

Since the present invention has the above-described structure and function, it is possible to set many types of leveling rolls in advance in the machine, corresponding to the width and material of the strip to be straightened. This has the great effect of greatly reducing the amount of non-levelling of the strip in synergy with the oscillating conveyance.

[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 along the line of 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 pedestal.

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 two sets of bearing arms have a bearing part for the leveling roll. A roll pedestal is provided on the outside, and 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 pair of bearing arms is connected to the bearing arm. A roll changing device characterized in that the bearing arm is slidably, rotatably, and detachably supported on a boss portion of an operating body, and when the engagement is released, the bearing portion of the bearing arm rotates downward about the boss.