JPH0128881Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a multi-high rolling mill, and more particularly, to a multi-high rolling mill in which the support rolls used in the rolling mechanism are also provided with a pass line adjustment function.

A known multi-high rolling mill is comprised of work rolls that engage and roll the material to be rolled, intermediate rolls that back up the work rolls, and support rolls that back up these intermediate rolls.

Conventionally, when a pass line adjustment mechanism is provided in this type of rolling mill, the center of the support roll is adjusted vertically by rotating an eccentric shaft via a pinion and a rack. I'm moving it around and adjusting the pass line.

By the way, when adjusting the pass line using a support roll that is not used in the rolling down mechanism, a sufficient amount of pass line adjustment could not be ensured.

Further, when the pass line adjustment is performed using the support roll used in the rolling down mechanism, the slight vibration causes rattling, which causes disturbance to the plate thickness control.

The present invention was developed in view of the above-mentioned current situation, and by providing the outer support roll used for rolling reduction adjustment with a pass line adjustment function, it is possible to eliminate rattling during rolling, that is, roll gap fluctuation, compared to conventional rolls. A large amount of pass line adjustment can be obtained, which in turn can reduce the roll waste diameter, leading to a reduction in roll consumption, and
It is an object of the present invention to provide a multi-high rolling mill in which support rolls can be easily rearranged.

Next, one embodiment of the present invention will be described with reference to the drawings.

The drawing shows a multi-high rolling mill according to the present invention, in which a work roll 1, an intermediate roll 2, an inner support roll 3 and an outer support roll 4 that support each roll from the outside are vertically symmetrical about a pass line 22. It is located.

An eccentric gear 11 is attached to the tips of the left and right inner support rolls 3, 3.
1 has a bush 13 on a shaft 12 fixed to the machine frame 5.
It meshes with the intermediate idle gear 9 attached via. Note that 10 is a bearing.

On the other hand, a screw shaft 7 rotated by a hydraulic motor 8 is attached to the machine frame 5 by a bearing 6.
The screw shaft 7 is provided with a right-hand thread 7a and a left-hand thread 7b, and the screws 7a and 7b have racks 7c and 7 that mesh with the intermediate idle gears 9a and 9b.
c are screwed together. Therefore, the rotation of the hydraulic motor 8 causes the eccentric gear 11 to rotate via the intermediate idle gears 9a and 9b, and the axes of the inner support rolls 3 and 3 are moved based on this, thereby directing the work roll 1 upward. It's starting to feel overwhelming.

The outer support rolls 4, 4 are attached at both ends to a roll shaft 15 supported by a saddle block 14, and by moving a wedge-shaped member back and forth in a horizontal plane in a direction parallel to the roll shaft 15, the outer support rolls 4, 4 are moved in the forward and backward directions. is moved in the horizontal direction by a known wedge-type hydraulic lowering mechanism which is adapted to move in a perpendicular direction, and the work roll 1 is lowered via the intermediate roll 2.

Further, a hydraulic motor 16 is attached to the lower end of the machine frame 5, and a spline 17a is attached to this motor 16.
A spindle 17 is connected upwardly via.

On the other hand, a rack guide 18 is attached to the saddle block 14, and a rack 20 is attached to the rack guide 18 to be screwed into a threaded shaft 19 connected to the spindle 17 by a spline 17a. Further, an eccentric pinion 21 (an eccentricity m) is attached to the end of the support roll 4, and this pinion 21 meshes with the rack 20. Therefore, when the hydraulic motor 16 is driven, the rack 20 is raised and lowered by the rotation of the screw shaft 19, and the support rolls 4, 4 are also displaced by axial movement by the rotation of the eccentric pinion 21, thereby adjusting the pass line 22. can be done.

A hydraulic cylinder 23 is attached to the rack guide 18, and its piston rod is constantly pressed against the rack 20 to eliminate backlash with the pinion 21.

As is clear from the above description, the present invention includes an inner support roll and an outer support roll supported by a saddle block and moved in the horizontal direction by a rolling down mechanism to roll down a work roll. In the multi-high rolling mill, a rack guide is attached to the saddle block, the rack guide guides and holds a rack that is raised and lowered by the rotation of the screw shaft, and the rack is engaged with an eccentric pinion attached to the shaft end of the support roll, A pass line adjustment mechanism is provided which displaces all the support rolls by axial movement via the pinion which rotates eccentrically as the rack moves up and down, and presses the rack against the pinion by a hydraulic cylinder attached to the rack guide. It is formed as follows.

Therefore, in addition to the pass line adjustment function provided by the inner support roll, a greater pass line adjustment function can be exhibited by the adjustment function of the outer support roll.

Further, the movement of the support roll is performed by an eccentric mechanism, which requires a small driving force, and therefore a small hydraulic motor can be used.

Further, the outer support roll can be removed from the machine frame by raising the rack, and the support rolls can be easily and quickly replaced. Note that the inner support roll can also be easily removed by making the intermediate idle gear, bush, and gear shaft into an assembly.

Also, as shown in the above embodiment, if a hydraulic cylinder is attached to the rack guide and this presses the rack against the pinion to eliminate backlash,
It is possible to prevent the roll gap from changing even in response to vibrations and shocks during rolling.

[Brief explanation of drawings]

The drawings show an embodiment of the multi-high rolling mill according to the invention, with FIG. 1 being a longitudinal cross-sectional view, FIG. 2 being a cross-sectional view showing the pass line adjustment mechanism portion of the outer support roll, and FIG. 3 being the same as FIG. 1. FIG. 1... Work roll, 2... Intermediate roll, 3...
...Inner support roll, 4...Outer support roll, 7...
... Screw shaft, 8 ... Hydraulic motor, 9 ... Intermediate idle gear, 11 ... Eccentric gear, 14 ... Saddle block, 15 ... Roll shaft, 16 ... Hydraulic motor,
17...Spindle, 18...Rack guide, 1
9... Screw shaft, 20... Rack, 21... Pinion, 22... Pass line, 23... Hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] In a multi-high rolling mill equipped with an inner support roll and an outer support roll supported by a saddle block and moved horizontally by a rolling down mechanism to roll down the work roll, a rack guide is attached to the saddle block, and the rack guide is mounted on the saddle block. A rack that is moved up and down by the rotation of a screw shaft is guided and held, and this rack is engaged with an eccentric pinion attached to the shaft end of the support roll, so that the pinion that rotates eccentrically as the rack moves up and down. A multi-stage rolling mill characterized in that it is provided with a pass line adjustment mechanism that displaces all the support rolls by axial movement through the rack guide and presses a rack against the pinion by a hydraulic cylinder attached to the rack guide.