JPS63237801A - Cutting device for rolling roll - Google Patents

Abstract

PURPOSE:To enable the machining by rolls without overhauling a mill by pressing and fixing the mill with a pusher for the horizontal positioning thereof and machining while pressing the rolls in a thrust direction and turning under preventing the shift of the rolls with a radial pre-load mechanism. CONSTITUTION:A mill A fitted with rolls 2, 2 is dismounted from a rolling line and shifted on a lift bed 8. In this stage, the machining reference seat of a machine frame 1 is slided to guide rails 18a, 18a and made to oppose to a reference body. And the lift bed 8 is vertically moved, thereby causing the height of one of the rolls 2, 2 to be equal to the bite height, and pushers 31a, 31a, 31b and 31b are extended to press the machine frame 1 and make horizontal alignment on the lift bed 8. Then, a joint part 45 is made to agree to the joint 5 of the roll 2 and the rolls 2 are pressed in a thrust direction to eliminate the back space thereof and rollers 23 and 23 are thereby forced to come in close contact with sides of the hole shape of the roll 2 for giving the predetermined pressing force in a radial direction. Also, a detecting rod is made in contact with the surface of the roll 2 for sensing the position thereof, the hole shape is machined with a bite and then the lower roll 2 is machined.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for cutting worn rolls of a rolling mill for repair purposes.

[Prior art and its problems] As is well known, rolling mills used to roll strips, wire rods, etc. periodically cut the rolls to correct deformation due to wear of the grooves, for example. is necessary. Conventionally, this work involved disassembling the rolling mill, extracting the rolls from the machine frame, setting them on a large lathe, and cutting them.

For this reason, it had to be disassembled, machined, and then reassembled, which was very time consuming. During this time, the rolling line had to be stopped, which caused the problem that the operating rate could not be improved. Moreover, disassembling and assembling a rolling mill requires a considerable amount of experience and requires a considerable amount of manpower and man-hours, so there is a strong desire to improve this.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention aims to provide a mill roll cutting device that can cut rolls without disassembling the rolling mill. To achieve this purpose, the rolling roll cutting device of the present invention includes a pusher that horizontally presses the rolling mill.

A rotary power source that is detachably connected to one end of the roll and rotates the roll while pressing it in the thrust direction, a tool holder that holds a cutting tool so as to face the circumferential surface of the roll that rotates once, and the opposite side of the tool holder. It consists of a radial preload mechanism that supports the circumferential surface of a rotating roll provided on the side opposite to the cutting tool.

In addition, there is a horizontally supported lifting platform that allows the height of the rolling mill to be adjusted freely depending on the finishing accuracy of the rolled rolls, the conditions of the cutting equipment, and improvements in cutting efficiency as necessary. a reference body for horizontal positioning provided on one side surrounding the lifting platform so as to face a processing reference seat provided;
A roll position detection device is also provided, which is provided toward the roll substantially parallel to the cutting tool and detects the portion of the roll to be cut.

[Function] The rolling mill removed from the rolling line is pushed and fixed with a pusher to horizontally position it, and the rolls are pushed in the thrust direction by the rotational power source and prevented from moving in the radial direction by the radial preload mechanism. Rotating the roll eliminates backlash and enables cutting.

When the rolling mill is provided with a lifting platform for raising and lowering it, cutting can be performed without changing the height of the cutting tool, which simplifies the mechanism of the cutting device.

Furthermore, when a reference body for horizontal positioning of the rolling mill frame is provided, the dimensional accuracy of, for example, the caliber l] is improved, which is convenient for cutting finishing rolls. If the position of the roll to be cut is automatically detected, there is no need to manually pick up the position, which improves efficiency.

[Example] Next, an embodiment of the present invention will be explained with reference to the drawings.

First, we will explain the rolling mill A shown by the phantom lines in the figure.This rolling mill A has a pair of rolls 2 on the upper and lower stages of the machine frame 1.
, 2 are horizontally supported by bearings 3, 3, respectively, (
In the case of a rolling mill with a pair of rigidly arranged rolls, the rolls are rotated through 90° and supported.

) Machining reference seats 4a and 4b in the form of vertically long grooves are provided near both corners of one long side of the machine frame l.

A joint portion 5, which serves as one side of a dog clutch, is provided at one end of each roll 2,2.

Next, the cutting bag [B] will be explained. The machine stand 6 installed on the installation plane has an open lower part in the shape of a rectangle in plan approximately at the center thereof, and a lifting platform 8 is provided in the open lower part. Note that the cutting tool may be raised and lowered without raising and lowering the rolling mill. A framework 9 is integrally assembled on the lower surface of the lifting platform 8, and a female screw body 10 is fixedly installed in the center of the framework 9.

Further, an underground bit is formed directly below the opening lower, and an underframe 11 that is integrated with the machine stand 6 is provided inside.A motor 12. A reduction gear 13 is installed. A threaded shaft 14 is provided on the rotary output shaft vertically protruding upward from the speed reducer 13, and the female threaded body 1o is screwed onto the threaded shaft 14.

Reference numerals 15, 15, . . . are guide rollers provided on the inner edge of the opening lower, and the guide rollers slide in contact with the four side edges of the framework 9 and guide the lifting platform 8 so that it can move up and down vertically.

Therefore, when the screw shaft 14 is rotated by the drive of the motor 12, the lifting platform 8 moves up and down. The rolling mill A is supported horizontally on the lifting platform 8, so that the height of the rolling mill A can be adjusted freely.

On the other hand, a structure 1G is immovably fixed on the machine base 6 on one long side of the opening 7, and a reference body 17a facing the processing reference seats 4a, 4b is provided on the surface of the structure 16 facing the rolling mill A. 17a
, 17b, and 17b are fixed in a protruding manner, respectively.

In addition, in the case of a rough roll for hot rolling that does not require high processing accuracy, a mere stopper may be used instead of the reference body.

18a, 18b are reference bodies 17a, 17a question and 17b
.

This is a guide rail fixed to the structure 16 so as to connect the sections 17b and extend upward. Rolling mill A is equipped with a hoist (
It is lifted from the rolling line by a lifting device such as a
The processing reference seats 4a and 4b of the rolling mill A are aligned with a and L8b, respectively, and the rolling mill A is lowered onto the elevator platform 8 along the guide rails 18a and 18b.
4b are the reference bodies 17a, 17a, 17b,
17b so that it can be smoothly faced.

Further, the structure 16 is provided with a radial preload mechanism 20. This is achieved by providing a receiving member 2.2 at the tip of the piston rod of a cylinder 21 which is installed horizontally on the back side of the structure 16 in the direction of the rolling mill A, and on the front surface of the receiving member 22, a pair of upper and lower rollers The rollers 23, 23 are rotatably provided, and the rollers 23, 23 can be pressed against the circumferential surface of the roll 2 of the rolling mill A by the pressing force of the cylinder 21.

In addition, supports 30a and 30b are established on the machine stand 6 on the other long sides of the open lower door opposite to the structure 16, and pushers 31a, 31a, 31b, and 31b are installed on the supports, respectively.
tt provided.

Each pusher presses the machine frame l of the rolling mill A to
are horizontally moved in the radial direction of the roll on the lifting platform 8, and the processing reference seats 4a, 4b are moved to the reference bodies 17a, 17a.

17b and 17b are brought into pressure contact. Also, 32a, 32
b is a support installed on the machine stand 6 on the short side of the open lower, and this also has pushers 33a, 33a, 33b, 3
3b, and each pusher similarly suppresses the machine frame l of the rolling mill A to horizontally move the rolling mill A in the roll axis direction,
A reference body 17a is placed at the corner of the groove-shaped processing reference seats 4a and 4b.
.

17a, 17b, and 17b are pressed together so that the rolling mill can be horizontally positioned on the lifting table 6.

Next, the rotational power source 40 for the roll 2 will be explained.

This reduces the speed reducer 42. A motor 43 and the like are fixedly installed, and a bearing body 4G having a joint part 45 facing the joint part 5 of the roll 2 at its tip is slidably disposed on a linear rail 44 parallel to the axial direction of the roll 2. The bearing body 46 is connected to the piston rod of the cylinder 47 and
It is configured to move forward and backward on the linear rail 44 by the operation of. The joint portion 45 is rotatably supported by a bearing body 46 and connected to the rotation output shaft 49 of the reduction gear 42 via a telescopic joint 48 . Therefore, the power of the motor 43 is transmitted from the endless belt 70. Reducer 422 rotation output shaft 49. The signal is transmitted to the joint 48 and the joint portion 45.

Then, by operating the cylinder 47 and pushing the bearing body 4G forward, the joint part 45 can be engaged with the joint part 5 of the roller 2, and a constant working fluid pressure is always applied to the cylinder 47 during power transmission. By doing so, the joint part 45 is always pressed against the joint part 5 with a predetermined pressing force, and by pressing the roller 2 in the sliding direction, backlash of the roller 2 is eliminated.

Next, we will explain about the tool holders 50 provided on the backs of the pillars 30a and 30b.Linear rails 52a and 52b parallel to the thrust direction of the rollers 2 are provided on the base frame 51 fixed on the machine base 1. A movable table 53 is provided so as to be able to freely slide along.

54 is a motor that serves as a power source for moving the moving table 53 along the linear rails 52a, 52b, and a screw shaft 62 connected to the motor and parallel to the linear rail is connected to the moving table 53.
are screwed together. On the moving platform 53 is the above-mentioned hilly rail 5.
A linear rail 55 is provided perpendicular to the linear rails 2a and 52b, and a cutter mounting board 56 is mounted on the linear rail.
A cutting tool 57 is fixed to the mounting 95G.

58 is a motor for moving the cutter mounting board 56 along the linear rail 55; 59 is a roll position detection device; a detection rod 64 is provided on the cutter mounting board 5G so as to be parallel to the cutting tool 57; The cylinder 60 advances and retracts, and its tip abuts the portion of the roll 2.2 to be cut, and the amount of advance can be detected as an electrical signal by a potentiometer.

Also, 61 is a vacuum suction device for collecting chips.

The tip of the suction hose 63 opens below the cutting tool 57.

In the rolling roll cutting apparatus configured in this way, as described above, the rolling mill A is removed from the rolling line with the rolls 2.2 still attached, lifted onto the lifting table 8, and placed on the lifting table 8. . At this time, by sliding the processing reference seats 4a, 4b of the machine frame l of the rolling mill A onto the guide rails 18a, 18a, the processing reference seats 4a, 4b are moved to the reference body 17a.
, 17a, 17b.

17b. Then, the elevator table 8 is moved up and down so that the height of one of the rolls 2 to be cut now matches the height level of the cutting tool 57. And pusher 31a
, 31a, 31b, 31b, pusher 33
a.

33a, 33b, and 33b are extended and the machine frame 1 is suppressed as described above to horizontally position the rolling mill A on the lifting platform 8. Then, the cylinder 47 is extended so that the joint part 45 matches the joint part 5 of the roll 2, and the cylinder 47 is operated to press the roll 2 in the thrust direction to eliminate the backlash, and the cylinder 21 is extended and the rollers 23. A predetermined pressing force is applied in advance to the opposite side of the cutting tool 57 in the radial direction of the roll 2 by pressing the rollers 23 against both sides of the hole to be cut. Then, the detection rod 64 is brought into contact with the surface of the roll 2, and while electrically detecting the surface position of the roll 2, the cutting tool 57 is moved to form a desired hole shape on the surface of the roll 2, and the motor 58.54 is moved. The roll 2 is rotated by the power of the motor 43 to cut the roll hole shape. At this time, the radial preload mechanism 20 cancels out the radial force received from the cutting tool 57.

After cutting the upper roll 2 in this manner, the lifting platform 8 is raised and the lower roll is then cut.

Note that, as in this embodiment, the roll position detection device 59 may be activated to detect the position of the surface of the roll 2 to be cut and feed back the signal to move the cutting tool 59. The cutting tool may be operated manually without position detection.

[Effects of the Invention] As described above with respect to the embodiments, the rolling roll cutting device according to the present invention can cut the roll without removing the roll from the rolling mill, so it can easily roll in a short time without the need for disassembly and assembly. Machine maintenance can be performed, improving operating efficiency.

The rolling mill is accurately horizontally positioned on the lifting table by the reference body and the pusher, and the rotating power source that rotates the roll while pressing it in the thrust direction and the peripheral surface of the roll are supported on the opposite side of the cutting tool. The radial preload mechanism eliminates all the backlash of the rolls and allows cutting while rotating under the same conditions as during rolling, which is advantageous in that high-precision cutting can be performed.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view, FIG. 2 is a longitudinal cross-sectional view, and FIG. 3 is a cross-sectional view. A: Rolling mill, B: Cutting device, 1: Machine frame, 2: Roll, 4a, 4b: Processing reference seat, 5: Joint part, 6...Machine base, 8...Elevating platform, 15...Guide roller, 17a, 17b...
・Reference body, 20...Radial preload mechanism, 23
...Koro, 31a, 31b...Pusher, 33
a, 33b...Pusher, 40...Rotary power source, 45...Joint part, 50...Bite holder. 57...Cutting tool, 59...Roll position detection device, 64...Detection rod.

Claims (2)

[Claims] (1) A rolling mill in which a pair of rolls are pivotally supported on a machine frame is used to cut the rolls, and the rolling mill is provided with a machining reference seat provided opposite to a processing reference seat provided on the outer surface of the machine frame of the rolling mill. A pusher that pushes the rolling mill horizontally, a rotational power source that is detachably connected to one end of the roll and rotates the roll while pressing it in the thrust direction, and a cutting tool that holds the cutting tool so as to face the circumferential surface of the rotating roll. A tool holder and
A rolling roll cutting device comprising: a radial preload mechanism that is provided on the opposite side of the cutting tool holder and supports the circumferential surface of a rotating roll on the opposite side of the cutting tool. (2) A horizontally supported lifting platform for making the height position of the rolling mill freely adjustable; and a platform provided on one side surrounding the lifting platform to face a processing reference seat provided on the outer surface of the rolling mill frame. A rolling roll according to claim 1, comprising: a reference body for horizontal positioning; and a roll position detection device, which is provided facing the roll substantially parallel to the cutting tool and detecting a portion of the roll to be cut. cutting equipment.