JP2002154036A - Method and device for grinding roll with chock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for grinding a roll with chocks with high grinding accuracy without detaching the chocks or requiring modification. SOLUTION: Both end parts 3 of a roll body 1 of the roll with the chocks is directly gripped to grind the outer peripheral surface of the roll body 1 while rotating the roll by roll rotary centers 14 provided at a headstock 10 and a tailstock 11 of this grinding device. It is preferable to provide a mechanism capable of adjusting the position of the roll rotary center 14 in vertical and lateral biaxial directions to adjust to minimize the amount of discrepancy from the axis of the roll.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for grinding a roll with a chock which is used for re-polishing the surface of a roll when a roll for rolling or conveying a strip is worn or scratched. It is about.

[0002]

2. Description of the Related Art Chock (bearing box) 2 is mounted on both ends of a roll body 1 as shown in FIG. Conventionally, the chock 2 was removed from the roll body 1 and set in the grinding device when grinding the roll. However, the removal and installation of the chock 2 is not easy, and a large number of operation personnel and chock attaching / detaching equipment are required. There was a problem.

Therefore, as disclosed in Japanese Patent Application Laid-Open No. 52-112889 and Japanese Utility Model Application Publication No. Sho 62-34682, a method has been put to practical use in which a roll is set in a grinding device with a chock attached. In this method, grinding is performed by supporting or clamping chocks at both ends of the roll. However, in this grinding method, since the grinding accuracy is determined by the fit between the bearing and the journal in the chock, the roll rotational runout after grinding is as large as 10 to 50 μm, which tends to be unstable. For this reason, although it has been applied to the grinding of the hot rolling roll, it has been difficult to apply it to the grinding of the cold rolling roll which requires a high grinding accuracy of 10 μm or less.

[0004] In addition, a grinding method for supporting a round portion at the end of a roll barrel of a roll with chocks has also been implemented. However, in order to carry out this method, it is necessary to increase the distance between the end of the roll barrel and the chock, and the problem of drainage of the coolant during rolling tends to occur. Further, a roll having a narrow gap between the end of the roll barrel and the chock could not be applied unless the roll structure was modified.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and enables a roll with a chock to be ground with high grinding accuracy without removing the chock and without requiring modification. The purpose of the present invention is to provide a method and an apparatus for grinding a roll with a roller.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a method for grinding a roll with a chock according to the present invention is characterized in that both ends of a roll body of the roll with a chock are provided on a headstock and a tailstock. The outer peripheral surface is ground while the roll is rotated by directly gripping with the roll rotary center provided. It is preferable to measure the amount of deviation from the axis of the roll and adjust the roll rotary center set on the headstock and tailstock so that the amount of deviation is minimized before grinding.

Further, the grinding apparatus for a roll with a chock according to the present invention is characterized in that a roll rotary center for directly gripping both ends of a roll body of a roll with a chock is provided on a headstock and a tailstock. is there. In addition, it is preferable to provide a mechanism capable of adjusting the position of the roll rotary center in two directions of up, down, left, and right.

According to the present invention, since both ends of the roll body of the roll with the chocks are directly gripped and ground by the roll rotary centers provided on the headstock and the tailstock, there is no possibility of runout. In addition, the outer peripheral surface of the roll can be ground with a high grinding accuracy of 10 μm or less required for the roll for cold rolling. Since both ends of the roll body penetrate the chock, there is no need to remove the chock, and the present invention can be applied to a roll having a narrow gap between the end of the roll barrel and the chock.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. 2 is a front view of the grinding apparatus of the present invention, FIG. 3 is a plan view thereof, FIG. 4 is a cross-sectional view of a main part, and FIG. 5 is a right side view of FIG. 2 and 3, reference numeral 10 denotes a headstock, and 11 denotes a tailstock.
It is the same as the conventional one that is set and rotated between 0 and the tailstock 11 and the outer surface is ground by the rotary grinding wheel 13 of the apparatus main body 12.

However, in the present invention, the headstock 10 and the tailstock 11 are provided with the roll rotary center 14 shown in FIGS. The structure will be described below. First, reference numeral 15 denotes four chucks protruding from the end face of the roll rotary center 14, and a raw claw 15a is attached to the inside of the tip. Base 16 of each chuck 15
Is slidably fitted in a radial groove 18 formed in the disk 17 of the roll rotary center 14 to form a grip portion.

The base 16 of each chuck 15 has a gentle spiral groove 19 similar to a scroll chuck of a lathe.
Are formed. And the adjacent worm wheel 2
Four slide pieces 21 protruding from the side surface of No. 0 are respectively engaged with the four spiral grooves 19. For this reason,
When the worm gear 22 shown in the lower part of FIGS. 4 and 5 is rotated using a tool or the like, the worm wheel 20 rotates,
Since the four slide pieces 21 protruding from the side face also rotate, the four chucks 15 provided with the spiral grooves 19 move in the radial direction at equal distances, and as shown in the drawing, the roll body 1 of the roll with the chocks is provided. Can be directly gripped at both ends 3. The opening and closing stroke of the chuck 15 is 3
About 5 mm is sufficient.

The above-mentioned roll rotary center 14
Can grip the roll body 1 in a state of being centered on the center axis of the worm wheel 20. In the present invention, a mechanism for adjusting the position of the entire roll rotary center 14 in two directions of up, down, left and right is incorporated. Have been. That is, the dovetail groove 2 is provided between the disk 23 holding the worm wheel 20 and the disk 24 on the left side in the drawing.
5, the disk 23 can be slid with respect to the disk 24 only in a certain direction (vertical direction in FIG. 4). By rotating an adjusting screw 26 provided at an end of the disk 24 with a control motor, the disk 2
3 can be slightly moved up and down with respect to the disk 24.

Further, a similar dovetail groove 29 and an adjusting screw 30 are provided between a disk 27 holding the disk 24 and a disk 28 on the left side thereof, and the disk 27 is
And 24 can be moved. In FIG. 4, the two adjusting mechanisms are both drawn in the up-down direction, but actually, they are cross-shaped, and the position can be adjusted in two X- and Y-axis directions. As a result, by rotating the adjusting screws 26 and 30 with the control motors, the position of the entire roll rotary center 14 can be adjusted in two directions of up, down, left and right.

In order to grind the roll with the chocks by using the grinding device having the above-mentioned configuration, first, as shown in FIGS. put on top. These chock receiving tables 31, 31 can be moved up and down by hydraulic pressure or the like, so that the roll with the chock is substantially centered on the roll rotation center of the grinding device. In this state, both ends 3 of the roll body 1 are directly gripped by the roll rotary centers 14 provided on the headstock 10 and the tailstock 11 as described above.

When the roll body 1 is directly gripped in this way, the roll body 1 is rotated at a low speed and the roll position measuring devices 32 installed on the headstock 10 and the tailstock 11 side move the roll body 1 vertically and horizontally. Measure the displacement of. At the same time, the roll rotation position is measured. Then, as shown in FIG. 6, the adjusting screws 26 and 30 are respectively rotated by the control motors while calculating by the controller 33, and the roll main body 1 is aligned with the grinding device. Thereafter, if the surface of the roll body 1 is ground by the rotary grinding wheel 13 of the apparatus body 12, the roll with the chocks can be ground with high accuracy of 10 μm or less.

[0016]

As described above, according to the method and the apparatus for grinding a roll with a chock of the present invention, accurate grinding can be performed without removing the chock from the roll with a chock. It can also be applied to roll grinding. Also, the present invention can be applied to a roll having a narrow gap between the end of the roll barrel and the chock, without modifying the roll structure, unlike the grinding method of supporting the round portion at the end of the roll barrel. Therefore, the present invention is excellent as a method and an apparatus for grinding a roll with a choke for rolling or transporting a steel strip.

[Brief description of the drawings]

FIG. 1 is a front view (A) and a side view (B) of a roll with chocks.

FIG. 2 is a front view of the grinding device of the present invention.

FIG. 3 is a plan view of the grinding device of the present invention.

FIG. 4 is a sectional view of a main part.

FIG. 5 is a right side view of FIG.

FIG. 6 is a block diagram showing a control system of the centering mechanism.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 roll body 2 chocks 3 both ends of roll body 10 headstock 11 tailstock 12 apparatus body 13 rotary grinding wheel 14 roll rotary center 15 chuck 15a raw claw 16 chuck base 17 disk 18 radiation groove 19 spiral groove 20 worm wheel DESCRIPTION OF SYMBOLS 21 Slide piece 22 Worm gear 23 Disk 24 Disk 25 Dovetail groove 26 Adjustment screw 27 Disk 28 Disk 29 Dovetail groove 30 Adjustment screw 31 Chock holder 32 Roll position measuring device 33 Controller

Claims (4)

[Claims] The present invention is characterized in that both ends of a roll body of a roll with a chock are directly gripped by a roll rotary center set on a headstock and a tailstock, and the outer peripheral surface thereof is ground while rotating the roll. How to grind a roll with chocks. 2. The method according to claim 1, wherein the amount of deviation from the axis of the roll is measured, and the roll rotary centers provided on the headstock and the tailstock are adjusted so that the amount of deviation is minimized before grinding. A method for grinding a roll with chocks according to claim 1. 3. A grinding machine for a roll with a choc, wherein a roll rotary center for directly gripping both ends of a roll body of the roll with a chock is provided on a headstock and a tailstock. 4. A grinding machine for a roll with a choke according to claim 3, further comprising a mechanism capable of adjusting the position of the roll rotary center in two directions of up, down, left and right.