JPH0815233A - Rolling roll grinding device - Google Patents

Abstract

PURPOSE:To provide a rolling roll grinding device, by which grinding to flaw detection can be fully automated. CONSTITUTION:A rolling roll grinding device comprises a base plate 15 for supporting a rolling roll 1 to be ground, a first driving source 17 and a first mover 4 provided on the base plate, a second mover 3 provided on the first mover, a rotary grinding wheel 2 and a second driving source 18 provided on the second mover, and a probe 8 provided on the free end part of a piston rod 7a of a second double acting cylinder 7 extending from a strut 5 erected on the first mover through a first double acting cylinder 6. The probe 8 is installed on the first mover, exists within a virtual vertical plane containing the rolling roll axis with the first double acting cylinder 6 put in the maximum elongated or contracted state, and is disposed in such a manner as to position in the grinding area of the rolling roll 1 by the rotary grinding wheel 2. According, the position adjusting operation for disposing the probe 8 in a proper position regardless of the rolling roll diameter and the grinding wheel diameter can be facilitated so as to enable full-automation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling roll grinding apparatus having flaw detection means.

[0002]

2. Description of the Related Art FIG. 12 is a simplified plan view of a conventional roll flaw detector disclosed in Japanese Utility Model Laid-Open No. 60-118956, and FIG. 13 shows a roll flaw detector shown in FIG. FIG. 14 is a front view, and FIG. 14 is a side view of the roll flaw inspection device shown in FIG. 12.

The rolling roll grinding apparatus has a base 55 for supporting the rolling roll 41 to be ground, a first drive source 57 provided on the base 55, a first moving body 44, and a first moving body 44. And a second moving body 43 provided above.

The first moving body 44 can reciprocate on the platform parallel to the virtual vertical plane 60 including the rolling roll axis. The second moving body 43 can approach and separate from the rolling roll 41 on the first moving body 44 perpendicularly to the virtual vertical plane 60. Further, on the second moving body 43, a rotary grindstone 42 for grinding the outer peripheral surface of the rolling roll, and a second drive source 58.
And a probe 48 for ultrasonic flaw detection are installed at different installation positions in the axial direction of the rolling roll.

The probe 48 includes a support column 45 which is vertically provided on the second moving body 43, a first double-acting cylinder 46, and a second double-acting cylinder 46.
It is provided at the free end of the piston rod 47a of the second double-acting cylinder 47 via the double-acting cylinder 47. The first double-acting cylinder 46 has its axis perpendicular to the virtual vertical plane,
It is fixed to the free end of the column 45. First double-acting cylinder 46
The piston rod 46a is expandable, and the second double-acting cylinder 47 is fixed to the free end of the piston rod 46a. The axis of the second double-acting cylinder 47 is parallel to the virtual vertical plane 60 and perpendicular to the horizontal plane. The piston rod 47a of the second double-acting cylinder 47 is expandable and contractable and can be displaced toward and away from the surface of the rolling roll.

Grinding of the rolling roll 41 is performed as follows. The first drive source 57 and the motor 58 rotate the rolling roll 41 and the rotary grindstone 42 in the directions of arrows 61 and 62, respectively. The second moving body 43 is brought close to the rolling roll 41 for a certain distance, and the rotary grindstone 42 is set at a corresponding position. Then, the first moving body 44 is moved in one direction. Grinding is performed over the entire circumferential surface of the rolling roll 41. Grinding is repeated until a predetermined grinding depth is reached. Ultrasonic flaw detection is not performed in the grinding stage of the rolling roll 41. Therefore, during this period, the piston rods 46a, 47a of the first double-acting cylinder 46 and the second double-acting cylinder 47 are formed.
Has retreated to the retreat limit.

After finishing the grinding of the rolling roll, ultrasonic flaw detection is performed. When performing ultrasonic flaw detection, the probe 48 must properly maintain a gap with the rolling roll 41 through a liquid. Therefore, when flaw detection is performed on the cylindrical rolling roll, the circumferential contact surface of the probe with respect to the rolling roll is limited to the surface of the rolling roll 1 on the virtual vertical plane 60. The operator operates the first double-acting cylinder 46 and the second moving body 43.
Until the probe 48 comes into contact with the rolling roll 41 by adjusting the position by visual measurement so that the probe 48 is on the virtual vertical plane 60 and operating the second double-acting cylinder 47. Lower it. If the contact position is not appropriate, the position is adjusted again. After that, the rolling roll 41 is rotated to move the first moving body, and ultrasonic flaw detection on the entire circumferential surface is performed.

[0008]

In such a conventional technique, since the support column on which the ultrasonic flaw detection probe is provided and the rotary grindstone are both installed on the second moving body, the virtual vertical plane is used. The distance between the column and the column is not a constant value, but varies depending on the size of the rolling roll diameter and the outer diameter of the rotary grindstone. At the time of ultrasonic flaw detection, the probe must be present within the virtual vertical plane, so that the first double-acting cylinder is moved relative to the virtual vertical plane every time the diameter of the rolling roll and the outer diameter of the rotary grindstone change. It is necessary to move them away from each other. Since this operation is performed by visual inspection by the operator, it requires skill and is time-consuming. Further, automation requires a sensor that detects the distance from the probe to the virtual vertical plane, which complicates the structure.

Further, the rolling roll is ground to a predetermined depth, and after the grinding is completed, ultrasonic flaw detection is performed on the entire circumferential surface while rotating the rolling roll. When a flaw is detected by flaw detection, additional grinding is performed. It is not efficient to manually perform such repeated operations of grinding and flaw detection. For this reason, it is necessary to automate, but in the above-mentioned conventional technology, it is difficult to automate the operation of allowing the probe to exist in the virtual vertical plane, and cannot be fully automated. Furthermore, in the above-mentioned conventional technology, since the installation positions of the rotary grindstone and the probe in the rolling roll axial direction are different,
At the end of grinding, the probe may stick out from the end of the rolling roll. In this case, in order to return the probe to the end of the rolling roll, it is necessary to move a distance corresponding to the gap between the rotary grindstone and the probe in the rolling roll axial direction.

Further, when grinding a rolling roll having a serious defect such as a seizure flaw, the first moving body is stopped while the rotating grindstone is in contact with the flaw, and the rolling roll and the rotating grindstone are rotated, The flaw may be ground intensively. In the prior art, the rotary grindstone and the probe are installed at different positions in the axial direction of the rolling roll. Therefore, the probe has to be moved to the ground area to detect flaws, which is troublesome to operate.

An object of the present invention is to provide a rolling roll grinding apparatus which can fully automate a series of operations from grinding to flaw detection, and can perform flaw detection at the grinding position at the same time while grinding.

[0012]

According to the present invention, there is provided a base for rotatably supporting a rolling roll to be ground, and a base provided on the base for rotationally driving the rolling roll around the axis. 1 drive source, a first moving body that can move on the platform along the axis, a second moving body that is provided on the first moving body, and can be displaced toward and away from the axis, and a second moving body A rotary grindstone that is provided above and has a rotation axis parallel to the axis, grinds the outer peripheral surface of the rolling roll, a second drive source that rotationally drives the rotary grindstone about the axis, and a first moving body. A rolling roll grinding device, comprising: a flaw detection means provided at a position substantially the same as that of the rotating grindstone in the axial direction in order to detect flaws in a grinding region of the rolling roll by the rotating grindstone.

Further, according to the present invention, there is provided a support column which is erected on the first moving body, and a first compound which is fixed to an upper end portion of the support column and in which the free end portion of the piston rod can approach and separate from the outer peripheral surface of the rolling roll. A dynamic cylinder and a second double-acting cylinder fixed to a free end portion of a piston rod of the first double-acting cylinder, wherein the axis line of the second double-acting cylinder is a rolling roll when the first double-acting cylinder is in a maximum extension state. A second double-acting cylinder, which is located substantially at the same position as the rotary grindstone in the axial direction and is in a virtual plane that includes the axis of the rolling roll, and in which the piston rod is extendable and retractable in the virtual plane; The flaw detection means is provided at the free end of the piston rod of the moving cylinder.

Further, according to the present invention, a supporting column which is erected on the first moving body and a column which is fixed to an upper end portion of the supporting column and which can be bent and swiveled around an axis having a vertical axis at a central portion thereof can be used. A horizontal arm having a free end capable of moving toward and away from the outer peripheral surface, and a second double-acting cylinder fixed to the free end of the horizontal arm, the axis of the second double-acting cylinder being in a maximum extension state of the horizontal arm. Is in substantially the same position as the rotary grindstone in the rolling roll axial direction, and exists in a virtual plane that includes the axis of the rolling roll, and the piston rod includes a second double-acting cylinder that is expandable and contractable in the virtual plane, The flaw detection means is provided at the free end of the piston rod of the second double-acting cylinder.

The present invention also responds to the output of the flaw detection means,
Judgment means for judging the presence or absence of scratches on the roll surface after grinding,
When it is determined that there is no scratch on the roll surface in response to the output of the determination means, the second moving body is retracted and the first and second moving bodies are moved backward.
Means for stopping the drive source.

[0016]

According to the present invention, the rolling roll is mounted on the bearing provided on the base and is rotationally driven by the first drive source. Further, the first moving body is placed on the base and the second moving body is placed on the second moving body.
A moving body is provided with a rotary grindstone and a second drive source on the second moving body. The first moving body is movable in parallel with an imaginary vertical plane including the axis of the rolling roll, and the second moving body is capable of being moved toward and away from the virtual vertical plane in a vertical direction. The rotary grindstone has a rotation axis parallel to the virtual vertical plane and can be rotationally driven by the second drive source. The flaw detection means is provided on the first moving body, is present in the virtual vertical plane, and is arranged so as to be located in the grinding region of the rolling roll by the rotary grindstone. Since the flaw detection means is installed on the first moving body in this manner, the distance between the flaw detection means and the virtual vertical plane is always constant, and even if the diameter of the rolling roll and the outer diameter of the rotary grindstone change, the flaw detection means There is no need to perform a position adjusting operation for making the position of the object in the virtual vertical plane. That is, by eliminating the position adjustment operation, which is difficult to automate, a series of operations from grinding to flaw detection can be fully automated. Further, the flaw detection means is present in the virtual vertical plane and is arranged so as to be located in the grinding region of the rolling roll by the rotary grindstone, so that the grinding can be performed while detecting the flaw. Therefore, in grinding a rolling roll having a serious defect such as a seizure flaw, in a state where the rotary grindstone is in contact with the flaw part, the first moving body is stopped and the rolling roll and the rotary grindstone are rotated to form the flaw part. In the case of intensive grinding, efficient grinding can be performed.

Further in accordance with the present invention, the first double-acting cylinder is fixed to the free end portion of the pillar vertically provided on the first moving body,
The second double-acting cylinder is fixed to the free end of the piston rod of the first double-action cylinder, and the flaw detection means is provided at the free end of the piston rod of the second double-action cylinder. Further, the free end of the piston rod of the first double-acting cylinder can be moved toward and away from the outer peripheral surface of the rolling roll, and the axis of the second double-acting cylinder exists within the virtual vertical plane in the maximum extension state of the first double-acting cylinder. However, the piston rod of the second double-acting cylinder can expand and contract within the virtual vertical plane.
Since the piston rod of the first double-acting cylinder and the piston rod of the second double-acting cylinder can be expanded and contracted in this manner, it is possible to quickly and easily switch between flaw detection and non-flaw detection. In addition, since each piston rod is retracted to the retracted limit at the time of non-defect detection, the rolling roll can be easily attached and detached. Further, since the axis of the second double-acting cylinder is installed so as to be present in the virtual vertical plane in the maximum stretched state of the first double-acting cylinder, the piston rod of the first double-acting cylinder is simply stretched to the maximum stretched state. The extension position can be easily adjusted.

Further, according to the invention, a horizontal arm can be provided in place of the first double-acting cylinder. Since the horizontal arm can be bent and swung in the central part, switching between flaw detection and non-flaw detection can be performed quickly and easily,
In addition, the rolling roll can be easily attached and detached. Further, since the axis of the second double-acting cylinder is installed so as to exist in the virtual vertical plane in the maximum extension state of the horizontal arm, the horizontal arm may be simply in the maximum extension state, and the extension position can be adjusted. It's easy.

Further, according to the present invention, there is a judgment means for judging the presence or absence of a flaw on the roll surface after grinding in response to the output of the flaw detection means, and there is no damage on the roll surface in response to the output of the judgment means. Since it has means for retracting the second moving body and stopping the first and second driving sources when the determination is made, a series of operations from grinding to flaw detection can be fully automated.

[0020]

1 is a plan view showing a simplified rolling roll grinder according to an embodiment of the present invention, and FIG. 2 is a front view of the rolling roll grinder shown in FIG. FIG. 2 is a side view of the rolling roll grinder shown in FIG. 1. Base 15
Is fixed on the floor horizontally with a rectangular flat table. Base 15
Bearings 16a and 16b and a first drive source 17 having a motor (not shown) are arranged on the upper side. Two bearings 16a,
16b has a common axis. Two bearings 16a, 16
By b, the rolling roll 1 is supported rotatably around its axis. The axis of the rolling roll 1 has bearings 16a, 16
It coincides with the axis of b. The first drive source 17 rotationally drives the rolling roll 1 in the direction of arrow 21. A pair of rails 9a and 9b is laid on the base 15. This rail 9a, 9
b is parallel to a virtual vertical plane 23 including the axis of the rolling roll 1 and is horizontal.

The first moving body 4 has a substantially rectangular flat plate shape, and a pair of fitting grooves 10a, 10b into which the rails 9a, 9b are fitted are formed in the lower portion thereof. The first moving body 4 is provided with a first moving body feeding mechanism 13 by a rack and pinion (not shown).
Thus, the first moving body 4 can reciprocate along the rails 9a and 9b. A pair of rails 11a and 11b is laid on the upper portion of the first moving body 4. The rails 11a and 11b are vertical and horizontal to the virtual vertical plane 23.

The second moving body 3 has a substantially rectangular flat plate shape, and a pair of fitting grooves 12a, 12b into which the rails 11a, 11b are fitted are formed in the lower portion thereof. The second moving body 3 has a grindstone feed mechanism 1 using a screw shaft (not shown).
4 is provided and the second moving body 3 can be moved toward and away from the rolling roll 1 along the rails 11a and 11b by the grindstone feeding mechanism 14. A second drive source 18 and a rotary grindstone 2 for grinding the outer peripheral surface of the rolling roll 1 are installed above the second moving body 3. The second drive source 18 is an electric motor, which is installed at one end of the second moving body 3 and rotationally drives the rotary grindstone 2 around the axis thereof in the arrow 22 direction. The rotating grindstone 2 is further rotated so that an imaginary vertical plane including the axis of rotation thereof is parallel to an imaginary vertical plane 23 including the axis of the rolling roll, and the axis of rotation is in an imaginary horizontal plane including the axis of the rolling roll 1. The grindstone width center is installed so as to coincide with the width center of the second moving body 3.
The other end of the second moving body 3 is secured as an inspection space 20 for visually checking the rolling rolls.

A column 5 is erected vertically on the virtual horizontal plane at one end of the first moving body 4 on the side of the first drive source 17. The first double-acting cylinder 6 is fixed to the upper end of the column 5 with its axis parallel to the virtual horizontal plane. The piston rod 6a of the first double-acting cylinder 6 is extendable and contractible, and the free end portion of the piston rod 6a exists in the virtual vertical plane 23 including the rolling roll axis line in the maximum stretched state, and the grinding area of the rolling roll 1 by the rotary grindstone 2 is present. Located above 19. Furthermore, the first double-acting cylinder 6
The second double-acting cylinder 7 is fixed to the free end of the piston rod 6a. The axis of the second double-acting cylinder 7 exists in the virtual vertical plane 23 in the maximum extension state of the first double-acting cylinder 6.
And is perpendicular to the virtual horizontal plane. Second double-acting cylinder 7
Of the piston rod 7a is expandable / contractible within the virtual vertical plane 23, and the free end portion thereof can be moved toward and away from the rolling roll grinding region 19. Air cylinders are used as the first double-action cylinder 6 and the second double-action cylinder 7. The second
A probe 8 for ultrasonic flaw detection is installed at the free end of the piston rod 7a of the double-acting cylinder 7. The probe 8 is brought into contact with the rolling roll 1 by the operation of the second double-acting cylinder 7, and is pressed by air pressure while maintaining a gap with the rolling roll 1 through a liquid such as grinding oil or water.

FIG. 4 shows the grinding area 19 and the flaw detection area 27.
It is a partial expansion view showing a relationship with. According to the present invention, the installation positions of the rotary grindstone 2 and the probe 8 in the rolling roll axial direction are substantially the same. Therefore, it is possible to perform flaw detection at the grinding position at the same time as grinding. When grinding and flaw detection are performed simultaneously, the width D of the grindstone is configured to be larger than the width C of the probe. Therefore, the flaw detection area 27 is included in the grinding area 19. When the first moving body 4 moves in the direction of arrow 28, the grinding region 19 and the flaw detection region 27 move in the direction of arrow 28 after the rolling roll 1 makes one rotation. The moving speed of the first moving body 4 in the direction of the arrow 28 is set so that the flaw detection areas before and after the movement overlap with each other at the margin L. Even when only flaw detection is performed, the moving speed of the first moving body is similarly set.

FIG. 5 is a schematic block diagram for explaining the fully automatic control operation of the rolling roll grinding apparatus according to the present invention. The rolling roll defect signal output from the ultrasonic flaw detector 31 is compared with a predetermined reference value in the processing circuit 32. When the defect signal is smaller than the reference value, it is determined that the rolling roll 1 is not damaged, and the piston rods 6a of the first double-acting cylinder 6 and the second double-acting cylinder 7 are automatically detected.
7a is retreated to the retreat limit, and the grindstone is moved back by the grindstone feeding mechanism 14. Further, the first drive source 17 is stopped to stop the rotation of the rolling roll. When the defect signal is larger than the reference value, it is determined that the rolling roll 1 has a scratch,
The 1st drive source 17, the 2nd drive source 18, and the 1st moving body 4 reciprocate by the rolling roll width, The grindstone feed mechanism 1 of the 2nd moving body 3
4 is activated and regrinding is automatically performed.

FIG. 6 is a flow chart for explaining the processing contents of the block diagram shown in FIG. In advance, the rolling roll 1 is mounted on the bearings 16a and 16b by a crane, and the journal portion of the rolling roll 1 is placed on the bearings 16a and 16b.

At step n1, automatic grinding by program control is started. In the automatic grinding, as shown in step n2, the first drive source 17 and the second drive source 18 rotate the rolling roll 1 and the rotary grindstone 2 in the directions indicated by the arrows 21 and 22, while the second moving body 3 approaches. By the contact between the rotary grindstone 2 and the rolling roll 1, the grindstone is fed to grind the roll surface while applying a constant load to the rotation of the grindstone.

The rotary grindstone 2 grinds the roll surface by the reciprocating movement of the first moving body 4, and continues grinding to a predetermined grinding depth according to a preset program. During this period, the probe 8 is brought into contact with the roll surface in steps n3 to n4, and automatic flaw detection is performed in step n5.
The automatic flaw detection is performed by interposing a grinding liquid between the probe 8 and the rolling roll 1. The ultrasonic wave reflection signal from the defective portion of the rolling roll output from the probe 8 is received by the flaw detector and displayed and recorded on the display device. In step n6, it is determined based on the flaw detection result whether or not there is a flaw having a predetermined reference value or more. If the flaw is equal to or larger than the reference value, the grinding amount is added in step n7, the rotary grindstone 2 continues the grinding by feeding the second moving body 3, and returns to step n5 to perform automatic flaw detection.

By this step, automatic grinding is continued until there are no defects above the reference value. When the flaws of a predetermined reference value or more are no longer detected, the automatic flaw detection is completed in step n8, and the probe 8 is separated from the roll and returned to the original position in steps n9 and n10. In step n11, the rotary grindstone 2 separates from the roll 1 and retracts, and in step n12, the rotation of the rotary grindstone 2 is stopped and the first driving body 4 is also stopped. At step n13, all automatic grinding flaw detection work is completed. During this time, no manual intervention is required and automatic grinding and automatic flaw detection work can be performed simultaneously. After the work is completed, the operator may be notified of the end of the work by voice or a rotating light.

Further, according to the present invention, when the heavy defect portion of the roll due to a rolling accident or the like is intensively ground, and also when the grinding work is performed with the first moving body 4 stopped, it can be automatically carried out as described above. . As the flaw detection means, an eddy current flaw detection device may be used instead of the ultrasonic flaw detection device.

FIG. 7 is a simplified plan view showing a rolling roll grinder of another embodiment of the present invention, and FIG. 8 is a front view of the horizontal arm 38 in the VIII-VIII direction shown in FIG. 9 is an explanatory view showing a state in which the horizontal arm is swung from the maximum extension state and bent, FIG. 10 is a plan sectional view showing a simplified configuration of the rotary actuator, and FIG. 11 is a rotation shown in FIG. It is a front sectional view of an actuator. Parts corresponding to those of the embodiment shown in FIG. 1 are designated by the same reference numerals.

At one end of the first moving body 4 on the side of the first drive source 17, a column 5 is erected vertically to the horizontal plane. Prop 5
The base end of the first arm 36 is horizontally fixed to the upper end of the. A rotary actuator 39 is fixed to the lower surface of the free end of the first arm 36. The base end of the second arm 37 is superposed on the free end upper surface of the first arm 36. A shaft hole 3 is formed at the free end of the first arm 36 and the base end of the second arm 37.
6a and 37a are provided, respectively. First arm 3
6 and the second arm 37 are connected by a shaft 39a of a rotary actuator 39 having a vertical axis through shaft holes 36a and 37a. The first arm 36 and the second arm 37 together form a horizontal arm 38. The shaft 39a of the rotary actuator 39 is rotatably inserted into a shaft hole 36a provided at the free end of the first arm 36, and the second arm 37
It is fixed via a key to a shaft hole 37a provided at the base end of the.

The rotary actuator 39 rotates the shaft 39a by a rack and pinion mechanism using high pressure air as a drive source. Since the shaft 39a is fixed to the base end of the second arm 37 as described above, the second arm 37 can pivot about the shaft 39a having the vertical axis.
Further, since the first arm 36 and the second arm 37 have the same length, the horizontal arm 38 can be bent at the center.

A stopper 40 is provided on one side surface of the free end portion of the first arm 36. The stopper 40 is installed on the side surface on the rotary grindstone 2 side. The stopper 40 is installed so that the turning of the second arm 37 is stopped when the horizontal arm 38 shows the maximum extension state. FIG. 7 shows the horizontal arm 38 in the maximum extension state, in which the stopper 40 is operating. The free end of the second arm 37 is present in the virtual vertical plane 23 including the rolling roll axis in the maximum extension state of the horizontal arm 38, and is substantially at the same position as the rotary grindstone in the rolling roll axial direction. The second double-acting cylinder 7 is fixed to the free end of the second arm 37. The axis of the second double-acting cylinder 7 exists in the virtual vertical plane 23 in the maximum extension state of the horizontal arm 38 and is perpendicular to the horizontal plane. The other structure is the same as that of the embodiment shown in FIG.

FIG. 9 shows a state in which the horizontal arm 38 is pivoted and bent from the maximum extension state. When ultrasonic flaw detection is not performed, the horizontal arm 38 can retract the second arm 37 by pivoting it in the arrow F direction around the axis 39a having a vertical axis and bending it. The second arm 37 can swivel up to an angle of approximately 180 °. Therefore, since the length of the horizontal arm is halved, the roll can be easily attached and detached.

The rotary actuator 3 is shown in FIGS.
The configuration of 9 is shown in a simplified manner. The rotary actuator 39 includes a cylinder 70, pistons 71a and 71b, and a rack body 7.
2, the pinion 73, the shaft 39a and the like. The cylinder 70 is a hollow body having a rectangular cross section and made of an aluminum alloy having a horizontal axis. Pistons 71a and 71b and a rack body 72 are fitted on the inner surface of the cylinder 70. The rack main body 72 includes a rack 7 in the axial direction of the cylinder 70.
2a is formed. Pistons 71a and 71b are fixed to both ends of the rack body 72 by bolts 78a and 78b, respectively. The pistons 71a and 71b can reciprocate while sliding on the inner surface of the cylinder 70 in the axial direction of the cylinder 70 by high pressure air. The moving distance of the pistons 71a and 71b is adjusted by the adjustment bolt 79 with a square hole.

A shaft 39a extends through the upper surface and the lower surface of the cylinder 70 and is perpendicular to a horizontal plane including the axis of the cylinder 70.
Is inserted. The shaft 39a is a solid steel body having a circular cross section and having a vertical axis. The shaft 39a has a pinion 73,
A pair of bearings 75a and 75b are fitted and fixed above and below the pinion 73, respectively. The pinion 73 is the rack 7
It meshes with 2a. The bearings 75a and 75b are bearing retainers 7
It is fixed to the cylinder 70 by 4. A key 76 is fitted on the upper end of the shaft 39a. The key 76 fixes the base end portion of the second arm 37 and the shaft 39a.

When high pressure air is supplied from the supply port 77a in FIGS. 10 and 11, the pistons 71a and 71b move to the right. The rack body 72 has pistons 71a, 7
Since it is fixed to 1b, the rack 72a also moves to the right, the shaft 39a rotates via the pinion 73 meshing with the rack 72a, and the second arm 37 pivots around the axis of the shaft 39a. When the high pressure air is supplied from the supply port 77b, the second arm 37 turns in the opposite direction.

[0039]

As described above, according to the present invention, the flaw detection means is installed on the first moving body, is present in the virtual vertical plane including the rolling roll axis, and is located in the grinding area of the rolling roll by the rotary grindstone. It is arranged to be located. Therefore, the distance between the flaw detection means and the virtual vertical plane becomes constant, and even if the diameter of the rolling roll and the outer diameter of the grindstone change, the position adjustment for allowing the flaw detection means existing in the conventional technology to exist within the virtual vertical plane is performed. No operation is required. By eliminating the position adjustment operation that hindered automation, a series of operations from grinding to flaw detection can be fully automated, greatly improving efficiency.

Further, the flaw detection means exists in the virtual vertical plane,
Since it is arranged so as to be located in the grinding region of the rolling roll by the rotary grindstone, it is possible to carry out grinding while detecting flaws. Therefore, it is possible to extremely efficiently perform concentrated grinding of the heavy defect portion, which is performed by bringing the rotating grindstone into contact with the heavy defect portion such as the seizure flaw of the rolling roll and stopping the first moving body.

Further, according to the present invention, the flaw detection means is provided with the free end of the piston rod of the second double-acting cylinder via the first double-acting cylinder and the second double-acting cylinder from the column vertically provided on the first moving body. Provided in the department. Since the piston rods of the first double-action cylinder and the second double-action cylinder can be expanded and contracted by air pressure, it is possible to quickly switch between flaw detection and non-flaw detection. Further, at the time of non-flaw detection, since each piston rod is retracted to the retracted limit, the rolling roll can be easily attached and detached. Further, since the axis of the second double-acting cylinder is installed so as to exist in the virtual vertical plane in the maximum stretched state of the first double-acting cylinder, the piston rod of the first double-acting cylinder is simply stretched to the maximum stretched state. The extension position can be easily adjusted.

Furthermore, according to the present invention, a horizontal arm can be provided in place of the first double-acting cylinder. Since the horizontal arm can be bent and swung in the central portion, switching between flaw detection and non-flaw detection can be performed quickly and easily, and the rolling roll can be easily attached and detached. Further, since the axis of the second double-acting cylinder is installed so as to be present in the virtual vertical plane in the maximum extension state of the horizontal arm, the horizontal arm may be pivoted to reach the maximum extension state until it hits the stopper, Easy adjustment of extension position.

Further, according to the present invention, the electrical configuration of the output processing of the flaw detection means compares the output of the flaw detection means with a predetermined reference value to judge the presence / absence of flaws on the roll surface, and depending on the judgment, Since the drive unit is configured to operate, it is easy to fully automate a series of operations from grinding to flaw detection.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing a rolling roll grinder according to an embodiment of the present invention.

2 is a front view of the rolling roll grinder shown in FIG. 1. FIG.

FIG. 3 is a side view of the rolling roll grinder shown in FIG.

FIG. 4 is a partial development view showing a relationship between a grinding area and a flaw detection area.

FIG. 5 is a schematic block diagram for explaining a fully automatic control operation of the rolling roll grinding device according to the present invention.

FIG. 6 is a flowchart for explaining the contents of processing of the block diagram shown in FIG.

FIG. 7 is a plan view schematically showing a rolling roll grinder of another embodiment of the present invention.

8 is a front view of the horizontal arm in the VIII-VIII direction shown in FIG.

FIG. 9 is an explanatory diagram showing a state in which the horizontal arm is pivoted and bent from the maximum extension state.

FIG. 10 is a plan sectional view showing a simplified configuration of a rotary actuator.

11 is a front sectional view of the rotary actuator shown in FIG.

FIG. 12 is a schematic plan view showing a typical conventional roll flaw detector.

13 is a front view of the roll flaw detection device shown in FIG. 12. FIG.

FIG. 14 is a side view of the roll flaw detection device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rolling roll 2 Rotating grindstone 3 2nd moving body 4 1st moving body 5 Strut 6 1st double acting cylinder 6a 1st double acting cylinder piston rod 7 2nd double acting cylinder 7a 2nd double acting cylinder piston rod 8 Search Tactile 15 Platform 17 First drive source 18 Second drive source 19 Grinding area 23 Virtual vertical plane including axis of rolling roll 36 First arm 37 Second arm 38 Horizontal arm 39 Rotating actuator 40 Stopper

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toyoharu Yasuda 4976 Nomuraminami-cho, Shinnanyo-shi, Yamaguchi Prefecture Shunan Steel Works, Nisshin Steel Co., Ltd. (72) Inventor Takao Matsuzaki 1-3-1, Tsujidojindai, Fujisawa-shi, Kanagawa Kanto Special Steel Co., Ltd. (72) Inventor Mitsuyoshi Meguro 1-3-1, Tsujido Kandai, Fujisawa City, Kanagawa Kanto Special Steel Co., Ltd.

Claims (4)

[Claims] 1. A pedestal that rotatably supports a rolling roll to be ground around its axis, a first drive source that is provided on the pedestal, and that rotationally drives the rolling roll around the axis, and on the platform. A first movable body that is movable along the axis, a second movable body that is provided on the first movable body, and that can be displaced toward and away from the axial line, and a second movable body that is provided on the second movable body. A rotary grindstone that has parallel rotating axes and grinds the outer peripheral surface of the rolling roll, a second drive source that rotationally drives the rotating grindstone about its axis, and a rolling roll that is provided on the first moving body and uses the rotating grindstone. A roll-roll grinding apparatus, comprising: flaw detection means located substantially at the same position as the rotating grindstone in the axial direction to detect flaws in the grinding area. 2. A strut that is erected on the first moving body, and a first double-acting cylinder that is fixed to the upper end of the strut and that has a free end of the piston rod that can move toward and away from the outer peripheral surface of the rolling roll. A second double-acting cylinder fixed to the free end of the piston rod of the first double-acting cylinder, wherein the axis of the second double-acting cylinder is in the rolling roll axial direction when the first double-acting cylinder is in the maximum extension state. A second double-acting cylinder, which is located substantially at the same position as the rotary grindstone and is located in a virtual plane including the axis of the rolling roll, and in which the piston rod is extendable and retractable in the virtual plane; The rolling roll grinding device according to claim 1, wherein the flaw detection means is provided at a free end portion of the piston rod. 3. A stanchion which is erected on the first moving body, and a fulcrum which is fixed to the upper end of the stanchion and whose central part is bent and pivotable around an axis having a vertical axis line. A horizontal arm having a free end capable of moving toward and away from the second arm, and a second double-acting cylinder fixed to the free end of the horizontal arm, wherein the axis of the second double-acting cylinder is a rolling roll when the horizontal arm is in the maximum extension state. A second axially extant position that is substantially the same as the rotary grindstone and is located within a virtual plane that includes the axis of the rolling roll, and the piston rod is expandable and contractable within the virtual plane.
The rolling roll grinding apparatus according to claim 1, further comprising a double-acting cylinder, wherein the flaw detection means is provided at a free end portion of a piston rod of the second double-acting cylinder. 4. A judging means for judging whether or not there is a scratch on the roll surface after grinding in response to the output of the flaw detecting means, and a case for judging that there is no scratch on the roll surface in response to the output of the judging means, The second moving body is retracted to move the first and second
The rolling roll grinding apparatus according to claim 1, further comprising: a means for stopping the drive source.