JPH04162903A - Continuous wiper device for mill roll - Google Patents

Abstract

PURPOSE:To make continuous grinding work possible by providing wiper devices with which abrasive sheets which are movable in the pass direction of material in a pair of mill rolls are pressed against rolls. CONSTITUTION:Pressing frames 1 which are movable backwards and forwards to the mill rolls 2 and moving bases 11 which can be reciprocated in the axial direction of the mill rolls are provided and the continuous wiper device for mill roll 2 is composed of a pressing roll 16 with which the abrasive sheet 35 is pressed against the mill roll and a device for moving the grinding device which consists of a winding shaft 30 for feeding abrasive sheet and rewinding shaft 25 on this moving base. In this way, the transfer of working position of abrasive sheet to the mill roll is executed without stopping the operation of line and grinding work can be continuously done.

Description

Detailed Description of the Invention (Industrial Field of Application) This invention provides a continuous wiper for constantly polishing the surface of mill rolls during skin bath rolling of stainless steel plates, etc., which require smooth and glossy surfaces. It is related to the device.

(Prior Art) Conventionally, as shown in FIG.
The roller is moved back and forth along the roll axis while being pressed against the surface of the roller. When the polishing action of the polishing sheet 35 has decreased, the polishing sheet 35 is separated from the surface of the mill roll 20, and the presser plate 3
I removed it from 6 and replaced it.

[Problem to be solved by the invention] Pressing and pressing of the polishing sheet 35 in mill roll polishing work
Since reciprocation and replacement are all done by hand, there is a risk that the work efficiency is low, which is dangerous, and the polishing effect may be uneven. Recently, in order to improve productivity, it has been considered to put skin bath rolling into a continuous annealing/pickling line, but in this case, it is impossible to stop the annealing and pickling process in the center of the line. While the polishing sheet 35 was being replaced, the skin bath rolling operation had to be interrupted, and an accumulator was required to store the material.

[Object of the Invention] This invention was made to solve the above-mentioned problems, and an object of the present invention is to automatically perform mill roll polishing work and to perform polishing sheet replacement work without stopping the line. .

[Means for Solving the Problems] As shown in FIGS. 1 to 4, the present invention includes a pressing frame 1 that can move forward and backward toward a pair of mill rolls 2 that are disposed opposite to each other with a material pass line L in between. A moving base 11 is provided on this pressing frame l so as to be able to reciprocate along the axial direction of the mill roll.
6 is provided facing the mill roll 2, and this pressing roll 1
A rewinding shaft 25 and a winding shaft 30 for movably supporting the polishing sheet 35 between the mill roll 2 and the polishing roll 2 are disposed on both sides of the pressing roll 16 and provided on the movable base 11, and the polishing sheet moving device A is provided. This configuration achieves the above object.

[Example] Examples of the present invention will be described below with reference to FIGS. 1 to 4.

Since the wiper device of the present invention is vertically symmetrical with respect to the material pass line L as a boundary, the following embodiments will be described with respect to the upper wiper device.

In the figure, reference numeral 1 denotes a pressing frame, which is placed on the material bus direction side of a pair of mill rolls 2 that are placed opposite to each other with the material pass line L in between, and is rotatably attached to a fixed frame 3 by a bracket 4 and a shaft 5. . Reference numeral 6 denotes a cylinder for forward and backward movement and pressing, which is rotatably attached to the fixed frame 3 by a bracket 7 and a shaft 8, and the pressing frame 1 is connected to the tip of the rod by a bracket 9 and a shaft 10. . The mounting frame 1 rotates around the shaft 5 by the rod extension and contraction operation of the cylinder 6, and can move forward and backward toward the mill roll 2.

Although an example has been described in which the pressing frame 1 is of a rotating type, it goes without saying that it may be of a linear type.

A movable base 11 is attached to the mill roll 2 side of the pressing frame 1 via a linear bearing 12 so as to be movable along the mill roll axial direction. Reference numeral 13 denotes a reciprocating cylinder, which is attached to the pressing frame 1 via a shaft 14, and the movable base 11 is connected to the tip of the rod via a bracket 15. The movable base 11 is supported by the pressing frame 1 by a linear bearing 12, and is capable of reciprocating along the mill roll axis direction by the expansion and contraction action of the rod of the cylinder 13.

Reference numeral 16 denotes a pressing roll, which is attached to the movable base 11 near the mill roll 2 by a bracket 17 and a bearing 18 so as to face the mill roll 2. This pressing roll 1
A lever 20 is provided at the end of the roll shaft 19 of No. 6, and the tip of the rod of a rotating cylinder 21 attached to the moving base 11 is connected to the tip of the lever via a pin 22.

In addition, the end of the roll shaft 19 of the pressing roll 16 and the moving base 1
1, a one-way clutch 23 is provided between the two. The pressing roll 16 can be rotated in one direction (clockwise direction in the first figure) by the rod extending and contracting operation of the cylinder 21.

These pressing rolls 16, one-way clutch 23, lever 2
0, the cylinder 21 constitutes an abrasive sheet moving device A.

Reference numeral 24 denotes a position detector (proximity switch in the embodiment) for detecting the position of the tip of the lever 20, which is attached to the movable base 11 so that its mounting position can be changed along the locus of movement of the tip of the lever 20. By interlocking the cylinder 21 so that it stops when it reaches the position detector 24, the pressing roll 16 is moved at the position of the position detector.
The rotation amount (feed amount of the polishing sheet 35, which will be described later) can be set.

25 is an unwinding shaft, which presses the press roll 1 toward the mill roll 2.
It is attached to the mill roll 2 side of the movable base 11 by a bracket 26 and a bearing 27 so as to be located on one side of the mill roll 2 . A torque limiter 28 for applying tension is connected to the unwinding shaft 25. And torque limiter 28
The unwinding shaft 25 is rotatable in one direction (clockwise direction in the first figure, that is, the polishing sheet unwinding direction) without receiving a braking force.

30 is a winding shaft, which is directed toward the mill roll 2 and presses the press roll 1.
It is attached to the mill roll 2 side of the movable base II by a bracket 31 and a bearing 32 so as to be located on the opposite side of the rewinding shaft 25 across the movable base II. A tension applying air motor 33 is connected to this winding shaft 30. The winding shaft 30 can be rotated in one direction (clockwise direction in the first drawing, that is, the polishing sheet winding direction) with a constant torque.

Reference numeral 35 denotes an abrasive sheet such as sandpaper wound into a roll, which is stretched between the unwinding shaft 25 and the winding shaft 30 and hung on the pressing roll 16. The clutch 23 works in conjunction with the mill roll 2 to prevent it from rotating in its rotational direction, and
The tension applying torque limiter 28 and the air motor 33 allow the roller to move between the mill roll 2 and the pressing roll 16 in the direction opposite to the rotation direction of the mill roll 2 without loosening.

The unwinding shaft 25 and the winding shaft 30 are cantilevered by a bracket 26 and a bearing 27, and a bracket 31 and a bearing 32, respectively, so that the polishing sheet 35 can be easily attached and taken out.

In the above configuration, when the pressing frame l is rotated around the axis 5 by the cylinder 6 for forward and backward movement and pressing, and the pressing frame l is advanced toward the mill roll 2 side, the abrasive sheet 35 hung on the pressing roll 16 is It is pressed against the surface of the mill roll 20 which is rotating in the clockwise direction shown in the first figure. At this time, rotational force is transmitted from the mill roll 2 to the pressing roll 16 via the polishing sheet 35, but the pressing roll 16 is locked to the moving base 11 via the lever 20 and the cylinder 21 by the action of the one-way clutch 23. Since the pressing roll 16 does not rotate in conjunction with the mill roll 2, the polishing sheet 35 is held on the pressing roll 16 and its polishing action acts on the surface of the mill roll 2. The force for pressing the polishing sheet 35 against the mill roll 2 is forward and backward, and the pressing is performed by the cylinder 6.
Set by.

After the polishing sheet 35 is pressed against the rotating mill roll 2, when the movable base 11 is reciprocated in the axial direction of the mill roll by the reciprocating cylinder 13, the surface of the mill roll 2 is efficiently polished by the polishing sheet 35.

When the polishing amount reaches a certain level or the polishing action of the polishing sheet 35 decreases after a certain period of time has passed after the start of polishing, the polishing sheet must be replaced due to the force (high pressure) of the cylinder 6 during normal pressing. When the pressing is switched to force (low pressure), the polishing sheet 35 is moved between the mill roll 2 and the pressing roll 1 without loosening due to the torque limiter 28 for adding tension and the air motor 33.
6 can be moved in the opposite direction of the rotation direction of the mill roll 2, so for forward and backward movement and pressing. After changing the pressure of the cylinder 6 to low pressure, the one-way clutch is activated by the Rondo telescopic operation of the rotating cylinder 21. When the pressing roll 16 is rotated in one direction (clockwise direction in the first drawing) through the pressing roll 23, the abrasive sheet 35 applied to the pressing roll 16 is
is moved from the rewinding shaft 25 to the winding shaft 30 by an amount corresponding to the amount of rotation (preset by the position detector 24). For example, the abrasive sheet 35 pressed against the surface of the mill roll 2 by the pressing roll 16 is strong in an area of 5 mm before and after the line connecting the axial centers of both rolls 2.16, and in an area of 10 mm each outside of the line. If the surface of mill roll 2 is weak and comes into contact with the surface of mill roll 2 within a total range of 30 m, the above operation will cause 3
If the polishing sheet 35 is moved by 0 ugliness, the polishing sheet 3
5 will be in its active position relative to the mill roll 2.

After that, the force for pressing cylinder 6 for forward and backward movement and pressing is
If the pressing force used when replacing the polishing sheet is returned to the normal pressing force, the polishing work described above can be performed with a new polishing sheet 35.

Therefore, if the polishing sheet 35 is attached to the unwinding shaft 25 with a sufficient length, and the unwinding end is fixed to the take-up shaft 30 and hung on the pressing roll 16, the polishing sheet 35 can be coated without stopping the line operation. The operating position of the 35 mill rolls 2 can be easily changed, and the cleaning work can be performed continuously.

In the above embodiment, the pressing roll 16 is rotated by a predetermined angle by operating the rotating cylinder 21, and the abrasive sheet 35 is rotated by a predetermined angle.
However, an endless chain is wound around the unwinding shaft 25, roll shaft 19, and take-up shaft 30, or they are connected with a gear train so that they rotate together, and the winding shaft is rotated 300 times by a motor. The polishing sheet 35 may be moved by a predetermined amount by the stop operation.

〔Effect of the invention〕

As described above, the present invention includes a pressing frame that is movable back and forth with respect to a mill roll, a movable base that is provided on this pressing frame and that is movable back and forth in the axial direction of the mill roll, and a movable base that is provided on this movable base and that is movable back and forth in the axial direction of the mill roll. It is composed of a pressing roll capable of pressing an abrasive sheet against a mill roll, a winding shaft, an unwinding shaft, and an abrasive sheet moving device capable of supplying the abrasive sheet between the pressing roll and the mill roll. From this, a compact wiper device can be obtained. In addition, since the polishing sheet can be moved by the take-up and unwinding shafts while the press roll is pressed against the mill roll at low pressure, the position of the polishing sheet on the mill roll can be changed without stopping the line operation, and the polishing It becomes possible to perform work continuously.

[Brief explanation of drawings]

Figure 1 is a front view showing an embodiment of this invention, Figures 2 and 3 are
Figures (a) and 4 are plan sectional views taken along lines A~, B~, and C~ in Figure 1, and Figure 3(b) is a left side view of Figure 3(a), and Figure 5 The figure is a front view showing a conventional example. 1... Pressing frame, 2... Mill roll, 3... Fixed frame, 4.7.9.15.
...Bracket, 5.8.10,14...
・Axis, 6...Cylinder for forward and backward movement and pressing, 11
...Moving base, 12...Linear bearing, 13...Reciprocating cylinder, 16...
... Pressing roll, 17.26.31 ... Bracket, 18.27.32 ... Bearing, 19.
...Roll axis, 20...Lever, 21.
...Rotating cylinder, 22...Pin, 2
3... One-way clutch, 24... Position detector, 25... Rewinding shaft, 28... Torque limiter for applying tension 130... ... Winding shaft, 3
3... Air motor for adding tension, 35...
・Abrasive sheet, A...Abrasive sheet moving device. Figure 1

Claims (1)

[Claims] (1) A pressing frame is provided so as to be movable back and forth toward a pair of mill rolls placed opposite to each other with the material pass line in between, and a moving base is provided on this pressing frame so as to be movable back and forth along the axial direction of the mill rolls. A pressing roll is provided on the moving base to face the mill roll, and an unwinding shaft and a winding shaft for movably supporting the abrasive sheet are arranged between the pressing roll and the mill roll on both sides of the pressing roll, and the moving base is provided with a pressing roll facing the mill roll. A continuous wiper device for a mill roll, characterized in that it is also provided with an abrasive sheet moving device.