JPS5923881B2 - Reduction mill pass line adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pass line adjustment device for a reduction mill, and particularly to an automatic adjustment device that can quickly and accurately adjust the height of a pass line in an electric reduction mill.

Conventionally, as a method for adjusting the height of the pass line in electric reduction type mills, a pressure block was installed on the underside of the lower reinforcing roll, and the liner was placed on the pressure block due to changes in the roll diameter when the work roll and reinforcing roll were changed. The installation had to be changed by humans to match the pass line height.

However, because the liner must be replaced every time the diameter of the work roll or reinforcing roll changes, when only the work rolls with short conversion cycles are being replaced, the lower reinforcing roll may have to be lifted depending on the diameter combination with the reinforcing roll. Later, the liner on the pressure block had to be replaced, which affected the time required to reassemble only the work rolls.

In order to shorten the work roll changeover time, the present invention has a pressure block at the bottom of the lower reinforcing roll that has several layers of thickness so that the liner installation does not have to be changed when work rolls are changed. In place of the C-hook, a cylinder for raising and lowering the lower reinforcing roll is installed at the bottom of the mill, the lower reinforcing roll is raised, and the optimum part of the pressure block is moved horizontally in the direction perpendicular to the line by the combination of the work roll and the reinforcing roll. By using cylinders that can be operated freely, this can be done without human intervention and within the time it takes to reassemble the work rolls.

The details of the present invention will be explained below based on the drawings.

In the figure, 1 is a mill housing, 2 is a work roll, and 3 is a mill housing.
and 4 are upper and lower reinforcing rolls; 5 is a step-like work side pressure block having several thicknesses disposed between the housing 1 and the roll chock of the lower reinforcing roll 4; and 8 is also on the drive side. The disposed pressure blocks 6 and 9 are first moving devices, 6 is a shift cylinder that is connected to move the pressure block 5 horizontally in the axial direction of the roll, and 9 is a shift cylinder that moves the other pressure block 8 to the roll. A shift cylinder is connected in series for horizontal movement in the axial direction, and a second moving device (hereinafter referred to as shift cylinder 7) is provided to minimize the protrusion of the pass line adjustment device from the housing 1. .1
0), and the cylinder 7.10 is installed on a pedestal 14.15 so that a shift plate 18 having a cylinder 6°9 on its upper surface can be horizontally moved in the axial direction of the roll.

Note that the pedestal 16 is for supporting the horizontal movement force of the shift plate 18.

Further, 11 is a V-saddle for pushing up the lower reinforcing roll, 12 is a pushing-up cylinder that raises and lowers the saddle 11, 13 is a lower separator that holds the cylinder 12, 14 is a work side frame, 15 is a drive side frame, 16 is the housing frame, 17
is a load cell housed within the housing frame 16.

Although the pressure block is arranged at the lower part of the lower reinforcing roll 4 side in FIGS. 1 and 2, the pressure block may be arranged at the upper part of the upper reinforcing roll 3 side as shown in FIG. 3. .

Further, the roll lifting device is not limited to being provided below the roll, but may be provided above the roll.

To explain the present invention in detail, as shown in FIG. 1, after rolling is completed, the upper reinforcing roll 3 is raised by a balance cylinder (not shown), and after the work roll 2 is pulled out from the mil-no-using 1, the push-up cylinder 12 is raised. Since the V-saddles 11 are arranged in series, by rising, the saddles 11 come into contact with the body of the lower reinforcing roll 4, and the lower reinforcing roll and the chock 4 are raised.

By doing so, gaps are created between the pressure blocks 5, 8, the shift plate 18, and the lower part of the lower reinforcing roll chock 4, so that the pressure blocks 5, 8 can freely move horizontally.

Therefore, after determining the height of the pressure blocks 5 and 8 based on the combination of the diameters of the work roll 2 and the reinforcing rolls 3 and 4, by operating the shift cylinder 6, shift cylinder 7, shift cylinder 9, and shift cylinder 10. A pass line is formed when the work roll 2 is attached to the mill housing 1.

In addition, if the difference between the diameter combinations of the work roll 2 and the reinforcing rolls 3 and 4 is large (when the difference between each combination of the maximum roll diameter and the minimum roll diameter is large), the pressure blocks 5 and 8 are arranged in two stages in the drawing. However, if the number of stages is more than one and a shift cylinder corresponding to the above is provided, the height of the pass line can be easily adjusted.

The above is a case of rearranging the work roll 2, and the reinforcing roll 3
．． Diameter correction by changing the pressure block 5,
If a liner having a thickness corrected according to the diameters of the reinforcing rolls 3 and 4 is placed on the reinforcing rolls 8, there will be no effect on the rearranging of the work rolls.

In addition, the housing frame 1 installed at the bottom of the housing 1
A load cell 17 is housed in the pressure block 6, but if the height does not fit the limit, it is possible to use the pressure blocks 5 and 8 themselves as a load cell, and the height of the housing frame 16 can be lowered. It is possible.

As explained above, according to the pass line adjustment device of the present invention, pass line adjustment can be performed quickly and accurately.
This greatly contributes to improving work efficiency.

[Brief explanation of drawings]

FIG. 1 is a front view showing a quadruple rolling mill equipped with the device of the present invention;
FIG. 2 is a detailed view of the lower part of the housing shown in FIG. 1, and FIG. 3 is a detailed view showing another example in which a pressure block is provided at the upper part. 1...Housing, 2...Work roll, 3...Upper reinforcement roll, 4...Lower reinforcement roll, 5...Pressure block (work side), 6...Shift cylinder for second stage (Working side), 7... 1st stage shift cylinder (Working side), 8... Pressure block (Drive side)
9... 2nd stage shift cylinder (1 drive side), 10
...1st stage shift cylinder (drive side), 11...
- V saddle for pushing up the lower reinforcing roll, 12... Cylinder for pushing up the lower reinforcing roll, 13... Lower separator, 14... Frame (work side), 15... Frame (drive side), 16 ...housing frame, 1T...load cell.

Claims (1)

[Scope of Claims] 1. A pass line adjustment device for a rolling mill that corrects pass line fluctuations by providing a plurality of stepped pressure blocks of different thickness between the rolling housing and the reinforcing roll chock, wherein the pressure block and a shift plate having a first moving device on its upper surface for horizontally moving the block, and a second moving device that engages with the shift plate and moves the shift plate in the horizontal direction; A pass line adjustment device for a reduction mill, characterized in that a housing frame is interposed between a shift plate and a housing. 2. Rolling - In a pass line adjustment device for a rolling mill that corrects pass line fluctuations by providing a plurality of step-like pressure blocks of different thickness between the arrangement of the uzing and the reinforcing roll chock, the pressure block and this block are a shift plate having a first moving device on its upper surface that moves the shift plate in the horizontal direction; a second moving device that engages with the shift plate and moves the shift plate in the horizontal direction; A housing frame is interposed between the reinforcing roll and the mill housing, one elevating cylinder is provided between the mill housings below the reinforcing roll, and the reinforcing roll body is configured to be able to be lifted via a member attached to the elevating cylinder. Reduction mill pass line adjustment device.