JPS6340241Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention forms an engagement portion with a spindle for driving a roll on a vertical rolling mill, particularly a yoke that is driven forward and backward toward the rolling line by a rolling device and supports a roll assembly. The present invention relates to a vertical rolling mill having a spindle moving mechanism that allows the spindle to move outward from a roll changing position when changing a roll assembly.

Conventionally, in a vertical rolling mill, roll rearranging work involves disengaging the roll driving spindles 6, 7 from the roll assemblies 1, 2, respectively, and suspending the spindles 6, 7, as shown in Fig. 1. Then, the yoke 10 is moved to the center of the housing 3 by the lowering screw 4 and the roll balance cylinder 5, and the lifting device 8, which is raised and lowered by the lifting cylinder 9, grabs the roll assembly 1 and raises it, and the roll shift device (not shown) to extract it from the rolling mill.

However, in recent years, roll diameters have been increasing in vertical rolling mills for hot rolling, and as mentioned above, there is a problem in that when the spindle is suspended, there is no space for the rolls to rise, making it impossible to rearrange the rolls. There is.

In order to deal with this, the spindle interval may be increased, or a structure may be adopted in which a movement device exclusively for the spindles is provided on the bottom surface of the gantry. However, increasing the spindle spacing increases the size of the rolling mill, making the line equipment longer, and if a moving device is installed, equipment costs will increase.
It is difficult to adopt it in practice.

The present invention is an attempt to solve the above-mentioned problems in the roll assembly reshuffling work of a vertical rolling mill.The present invention aims to solve the above-mentioned problems in the roll assembly rearrangement work of a vertical rolling mill. It is an object of the present invention to enable roll reshuffling to be easily performed by configuring the spindle to move outward from the roll reshuffling position via the joint.

Hereinafter, the present invention will be described in detail based on an embodiment shown in the accompanying drawings.

FIG. 2 to FIG. 4 are front views of the vertical rolling mill according to the present invention. An engagement protrusion 11 is integrally attached to the upper surface of a yoke 10 that is connected to the balance cylinder 5 and supports the roll assembly so as to protrude upward.

At the bottom of the spindles 6, 7, fitting holes 6a, 7a are provided in the axial direction into which the connecting protrusions 1a, 2a of the roll assemblies 1, 2 can fit.
The shape of the engaging protrusion 11 is such that it can be fitted into the fitting holes 6a, 7a of the roll assembly 1,
The connecting protrusions 1a and 2a of No. 2 are approximately the same (the fifth
(See Figure 6).

Describing the procedure for changing the rolls in the vertical rolling mill with the above configuration, if the right roll assembly 1 is taken out first, the rolling screw 4 and balance cylinder 5 will be removed as shown in Figure 2.
The roll assembly 1 is moved to the right and brought to the vertical position of the spindle 6. In this state, the spindle 6 is raised to disengage from the roll assembly 1, and the rolling screw 4 and balance cylinder 5 are extended, thereby aligning the roll axis of the roll assembly 1 with the center of the rolling mill body. The rolls are moved to a position where the rolls are almost aligned. At this time, the engaging protrusion 11 is arranged so as to be directly below the spindle 6 and in a position where the engaging protrusion 11 can be fitted into the fitting hole 6a.

Next, in the lifting device 8, the roll assembly 1
the roll assembly 1 and the yoke 10.
cut ties with Then, the spindle 6 is lowered and the engagement protrusion 11 erected on the yoke 10 is inserted into the fitting hole 6.
a, the yoke 10 is moved to the right by the rolling down screw 4 and the roll balance cylinder 5 connected to the rolling down device, and the spindle 6 is moved to a position where there is no problem in changing the rolls (Fig. 4). ).

In addition, the spindle 7 on the non-rearranging roll side is connected to the lowering screw 4 and the roll balun cylinder 5 while being connected to the roll assembly 2 before moving the roll assembly 1 to be reassembled to the roll recombination position. Therefore, it is moved to the left to a position where there is no problem in changing the rolls (see Fig. 3).

As described above, the spindles 6 and 7 are connected to the engaging protrusion 1
The lower end of the roll assembly 1 is pulled by the roller assembly 1, and as shown in FIG. When it reaches a predetermined position, it can be transported out of the rolling mill by a roll shift device (not shown).

Furthermore, the installation of a new roll can be performed by the reverse procedure to the above, and the rearrangement of the left roll assembly 2 can also be performed in the same manner as described above.

As described above, according to the present invention, since the engaging protrusion is provided on the yoke that is movably disposed in the vertical rolling mill body so as to tilt the spindle, other dedicated spindle moving devices are not required. This has the effect that the roll assembly can be rearranged without any need for it.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional vertical rolling mill when the rolls are changed, and FIGS. 2, 3, and 4 are front views showing the roll changing procedure in the vertical rolling mill according to the present invention. , FIG. 5 is a front view showing the yoke portion, and FIG. 6 is a plan view of the yoke portion. 1, 2...Roll assembly, 3...Housing, 4...Down screw, 5...Roll balance cylinder, 6, 7...Spindle, 8...
Elevating device, 9... Elevating cylinder, 10... Yoke, 11... Engaging protrusion.

Claims (1)

[Scope of utility model registration request] A yoke that removably supports the roll assembly and can move forward and backward in a direction perpendicular to the rolling line using a rolling down device engages with the lower part of a spindle that is rotatably and bendably suspended from a drive source in the upper part of the housing. A vertical rolling mill characterized by vertically provided engaging protrusions.