JP2019084624A - Method for production of glass plate and fixing apparatus for positioning of grind stone - Google Patents

Abstract

To make it possible to easily in a short time, carry out the positioning fixation of a grind stone on its flange by anybody in end face processing of a glass plate by rotational contact with the grind stone.SOLUTION: A production method for a glass plate in this invention comprises a preparation process S1 of preparing a rotary tool 28 in which a grind stone 11 and a grindstone flange 20 are integrated, and an end face processing process S2 of carrying out a prescribed processing on the end face 2 by contacting a rotating grind stone 11 on the end face 2 of the glass plate 1. In the method, the preparation process S1 includes a deflection amount measurement step S12 of measuring a static deflection amount L of the grind stone 11 in such a state as being installed to the grindstone flange 20 by a deflection amount measurement apparatus 32; and a position correction step S14 of correcting a position of the grind stone 11 facing the flange 20 by movement of the grind stone 11 in response to the static deflection amount L by a movement unit 33 for moving the grind stone 11.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a method of manufacturing a glass sheet and a positioning and fixing device for a grinding stone, and more particularly to a technology for positioning a grinding stone used for end face processing of a glass sheet relative to a grinding wheel flange.

  In recent years, in order to meet the demand for the improvement of the production efficiency of liquid crystal displays and the like, the demand for the improvement of the production efficiency of glass substrates used for the displays and the like is increasing. Here, in manufacture of a glass substrate, cutting out the glass substrate of 1 sheet or several sheets from a large sized glass base plate (forming base plate) is performed. This makes it possible to obtain a glass substrate of a desired size.

  On the other hand, since the end face of the glass substrate cut out from the glass plate is usually a cut surface or a fracture surface, a minute flaw (defect) often exists. When the end face of the glass substrate is scratched, a crack or the like is generated from the scratch, and in order to prevent this, one of the grinding process (rough polishing process) and the polishing process (finishing polishing process) is performed on the end surface of the glass substrate. Or both are applied. This type of end face processing is performed, for example, by rotating a grindstone in contact with the end face of the glass substrate (see, for example, Patent Document 1). Further, at this time, the grindstone is connected to a motor for driving the spindle for rotation via a grindstone flange attached to the tip portion of the spindle that is rotationally driven (see, for example, Patent Document 2).

International Publication WO2013 / 187400 JP 2001-179623 A

  As described above, since the grindstone is connected to the rotary drive via the grindstone flange, the rotational accuracy of the grindstone is affected by the attachment accuracy with the grindstone flange. Therefore, for example, if there is a deviation of the central axis between the grindstone and the grindstone flange (so-called eccentricity called center deviation), this deviation causes the end face of the glass plate to have a waviness (for example, a waviness curve of arithmetic average waviness Wa). It may appear as a swell that appears in the same order. Therefore, it is necessary to fix the grindstone in a state of being positioned relative to the grindstone flange so that the central axis of the grindstone and the central axis of the grindstone flange coincide as much as possible.

  This positioning is performed, for example, by rotating the grinding wheel flange with the grinding wheel mounted and measuring the magnitude of the static run-out of the grinding wheel, and then taking into consideration the size of the static run-out measured. This is done by the user striking the whetstone with a hammer or the like and moving the whetstone in a direction to eliminate static runout. However, with such a method, a corresponding time is required to improve the misalignment (to perform positioning), and there is a problem in terms of work efficiency. Above all, there is also a problem that this kind of work depends on the skills and experience of the workers, so the number of workers that can be performed is limited.

  In view of the above-mentioned circumstances, in the present specification, when performing end face processing of a glass plate by rotational contact of a grindstone, it is possible to easily position and fix the grindstone to the grindstone flange in any one person in a short time. Technical issues to be solved by the invention.

  The solution to the above problems is achieved by the method for producing a glass sheet according to the present invention. That is, in this manufacturing method, in a state where the positioning of the grinding wheel with respect to the grinding wheel flange is performed, the grinding wheel is fixed to the grinding wheel flange, and a preparing step of preparing a rotating tool in which the grinding wheel and the grinding wheel flange are integrated; A method of manufacturing a glass plate including an end face processing step of subjecting the end face of the glass plate to a predetermined processing, wherein the preparation step comprises setting the static runout amount of the grindstone attached to the grindstone flange to the reference surface of the grindstone A shake amount measuring step of measuring using a shake amount measuring device, and a position correction step of correcting the position of the grindstone with respect to the grindstone flange by moving the grindstone according to the static shake amount. It is characterized by having a point.

  As described above, in the manufacturing method according to the present invention, the static runout amount of the grindstone attached to the grindstone flange is measured by the runout measuring device in the preparation step of the rotary tool which is an integral part of the grindstone and the grindstone flange. At the same time, the moving device for moving the grinding wheel corrects the position of the grinding wheel relative to the grinding wheel flange by moving the grinding wheel according to the static deflection amount. As described above, by performing both the measurement of the static runout amount and the movement of the grinding wheel according to the static runout amount using a machine (runout amount measuring device, moving device), the static speed is always maintained at a constant speed and the same procedure. It is possible to automatically correct the position of the grinding wheel according to the target swing amount. Thus, positioning and fixing can be performed with a constant accuracy regardless of the degree of skill of the worker. Further, if the whetstone is moved by the moving device according to the static runout amount, the movement amount of the whetstone is stable as compared to the manual operation, so that the whetstone can be moved stably with less man-hours. Therefore, it is possible to stably carry out a series of operations for positioning and fixing in a short time.

  Further, in the method of manufacturing a glass plate according to the present invention, in the deflection amount measuring step, the static deflection amount is a deflection amount measuring device while rotating the grinding wheel flange in a state where the grindstone is attached around the central axis by the rotational drive device. It may be measured by

  The static runout can also be measured by rotating the runout measuring device around the center axis of the grinding wheel flange while the grinding wheel flange is fixed, but the grinding wheel flange (rotary tool) rotates during end face processing. Therefore, if the static runout amount is measured while rotating the grinding wheel flange, the state is the same as at the end face processing, so the static runout amount can be measured with higher accuracy.

  Further, in this case, in the method of manufacturing a glass plate according to the present invention, in the deflection amount measurement step, using the contact displacement sensor included in the deflection amount measuring device, the grindstone flange is rotated while pressing the contact displacement sensor against the reference surface. It may be rotated by a drive.

  By rotating the grinding wheel flange while pressing the contact type displacement sensor against the reference surface of the grinding wheel as described above, the static runout of the grinding wheel can be measured with higher accuracy.

  Further, in the method of manufacturing a glass sheet according to the present invention, in the position correction step, the moving device may push the grindstone toward the central axis on a virtual straight line intersecting the central axis of the grindstone flange.

  By moving the grinding wheel with the moving device in this manner, the position of the grinding wheel can be corrected with a very simple operation and with the shortest distance. Therefore, it is possible to reduce the number of corrections of the position of the grinding stone necessary to bring the misalignment amount (static runout amount) within the allowable range, thereby performing a series of operations relating to positioning and fixing in a shorter time. Can.

  In this case, in the method of manufacturing a glass plate according to the present invention, the circumferential direction position of the grindstone when the distance from the central axis of the grindstone flange to the reference surface is maximized is obtained in the runout measurement step. In the position correction step, the grinding wheel flange may be rotated by a rotational drive such that the circumferential position is located on an imaginary straight line intersecting the central axis of the grinding wheel flange.

  As described above, with the circumferential direction position of the grindstone at the time when the static runout amount is maximized is positioned on the virtual straight line, the displacement of the grindstone by the moving device is corrected efficiently. Can be within the allowable range. For this reason, it is possible to further reduce the number of corrections of the position of the grinding stone necessary to bring the misalignment amount into the allowable range. Further, since a common rotational drive device is used in the deflection amount measurement step and the position correction step, a device for rotating the moving device around the central axis of the grinding wheel flange is unnecessary, and the equipment cost can be reduced.

  Further, in the method of manufacturing a glass plate according to the present invention, the grinding wheel flange may be rotated by driving the rotary drive device by the first servomotor.

  As described above, when the rotation drive device is rotated by the servomotor, the static shake amount can be measured with higher accuracy. In particular, when correcting the position, as described above, the grinding wheel flange is rotated so that the circumferential direction position of the grinding wheel when the static deflection amount is maximum is located on a virtual straight line intersecting the central axis of the grinding wheel flange. In this case, the circumferential position can be accurately detected by a position detection device (such as an encoder) of the servomotor. Therefore, the circumferential direction position of the grindstone can be arranged on the imaginary straight line with high accuracy, and it is possible to further improve the correction accuracy of the position of the grindstone.

  In the method of manufacturing a glass plate according to the present invention, the moving device may be driven by the second servomotor to move the grinding stone.

  As described above, when the moving device is driven by the servomotor, the position of the grinding wheel can be corrected with higher accuracy. In particular, when correcting the position of the grinding wheel, when pushing the grinding wheel toward the central axis on a virtual straight line intersecting the central axis of the grinding wheel flange by the moving device, the pressing amount (linear movement distance) of the grinding wheel by the moving device is Directly linked to the increase or decrease in static runout. Therefore, if the moving device is driven by the servomotor, the grindstone can be pushed in by the amount of accurate movement according to the static shake amount, and it is possible to correct the position of the grindstone with higher accuracy by this. Become.

  Further, in the method of manufacturing a glass plate according to the present invention, the control device controls the first servomotor and the second servomotor, and the control device continues until the static deflection amount becomes equal to or less than a predetermined value. The position correction step and the shake amount measurement step may be repeatedly performed by the first and second servomotors.

  As described above, the control device controls the first servomotor that rotationally drives the grinding wheel flange and the second servomotor that drives the moving device, so that the determination of the operator can be performed automatically and accurately. The measurement of the static deflection and the movement of the grinding wheel (position correction) are repeated. Then, when the static shake amount falls within the allowable range (less than a predetermined value), the work is automatically ended. Accordingly, the positioning of the grinding wheel relative to the grinding wheel flange can be performed and completed at the optimum number of times and time per grinding wheel.

  Further, in the method of manufacturing a glass sheet according to the present invention, the preparation step includes a grinding stone holding step of holding the grinding stone by cooperation of the moving device and the holding device in a state where positioning of the grinding wheel with respect to the grinding wheel flange is performed. The method may further include a grinding wheel fixing step of fixing the grinding wheel to the grinding wheel flange while holding the grinding wheel.

  As described above, if the wheel is held in a holding state, the wheel can be fixed accurately without moving the wheel. In addition, since the holding device can be configured simply by using the moving device to hold the grindstone, the equipment cost can be reduced.

  Moreover, the solution of the said subject is achieved by the positioning fixing device of the grindstone which concerns on this invention. That is, this positioning and fixing device is a device for fixing a grindstone for performing predetermined end surface processing on the end surface of a glass plate by rotational contact to the grindstone flange with positioning, and in a state of being attached to the grindstone flange The displacement device includes a runout measuring device for measuring the static runout of the grinding wheel, and a moving device for moving the grinding wheel, and the moving unit moves the grinding wheel according to the static runout to move the position of the grinding wheel to the grinding wheel flange. It is characterized by the point to correct.

  As described above, in the positioning and fixing device according to the present invention, when correcting the position of the grindstone with respect to the grindstone flange, the shake amount measuring device for measuring the static shake amount of the grindstone attached to the grindstone flange and moving the grindstone A moving device is provided, and the moving device corrects the position of the grinding wheel relative to the grinding wheel flange by moving the grinding wheel according to the static deflection amount. As described above, by performing both the measurement of the static runout amount and the movement of the grinding wheel according to the static runout amount using a machine (runout amount measuring device, moving device), the static speed is always maintained at a constant speed and the same procedure. It is possible to automatically correct the position according to the target shake amount. Thus, positioning and fixing can be performed with a constant accuracy regardless of the degree of skill of the worker. Further, if the whetstone is moved by the moving device according to the static runout amount, the movement amount of the whetstone is stable as compared to the manual operation, so that the whetstone can be moved stably with less man-hours. Therefore, it is possible to stably carry out a series of operations for positioning and fixing in a short time.

  As described above, according to the present invention, when performing end face processing of a glass plate by rotational contact of a grindstone, positioning and fixing of the grindstone with respect to the grindstone flange can be performed easily by any person in a short time. Become.

It is a flowchart which shows the procedure of the manufacturing method of the glass plate which concerns on 1st embodiment of this invention. It is a schematic plan view of the end surface processing apparatus of the glass plate used by 1st embodiment of this invention. It is a principal part side view of the rotation system of the whetstone shown in FIG. It is a flowchart which shows an example of the specific procedure of the preparatory process shown in FIG. It is a side view of the positioning fixing device of the grindstone used for the preparatory process shown in FIG. It is a principal part top view of the positioning fixing device shown in FIG. It is a side view for demonstrating the operation | movement in the case of implementing an example of a static deflection | deviation amount measurement step using the positioning fixing device shown in FIG. It is a graph which shows typically an example of the measurement result of static deflection amount. It is a side view for demonstrating the operation | movement in the case of implementing the other example of a static deflection | deviation amount measurement step using the positioning fixing device shown in FIG. It is a top view for demonstrating the operation | movement in the case of implementing an example of a position correction step using the positioning fixing device shown in FIG. It is a top view for demonstrating the operation | movement in the case of implementing an example of a position correction step using the positioning fixing device shown in FIG. It is a top view for demonstrating the operation | movement in the case of implementing an example of a grindstone fixing step using the positioning fixing device shown in FIG. It is a principal part top view of a positioning and fixing device concerning a second embodiment of the present invention. It is a principal part top view of the positioning fixing device concerning a third embodiment of the present invention.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

  In the method of manufacturing a glass plate according to the present embodiment, as shown in FIG. 1, a preparation step S1 of preparing a rotary tool in which a grindstone and a grindstone flange are integrated, and predetermined on the end face of the glass plate using the rotary tool And an end face processing step S2 for performing processing. In addition, you may provide the cutting process which cuts out the glass plate of a desired size from a glass original plate as a pre-process of end surface process process S2, as needed. Moreover, you may provide a washing | cleaning process, an inspection process, a packing process etc. as a back process of end surface process process S2. First, in the present embodiment, an outline of an end surface processing apparatus used in the end surface processing step S2 will be described based on FIG. 2 and FIG.

  As shown in FIG. 2, the end face processing apparatus 10 performs predetermined processing on the end face 2 of the glass plate 1, and the motor 13 for rotationally driving the whetstones 11 and 12 and the whetstones 11 and 12 can be rotated. It mainly includes an arm member 14 to be supported, and a servo mechanism 15 that causes the arm member 14 to generate a force with which the grindstones 11 and 12 press the end face 2 of the glass plate 1.

  For the motor 13, for example, a synchronous motor that rotates in synchronization with the rotational speed difference between the rotating magnetic field generated by the alternating current and the magnetic field generated by the armature current is used. The motor 13 can rotationally drive the grinding wheels 11 and 12 by open loop control without using closed loop control (feedback control). For example, as shown in FIG. 3, a spindle 19 is connected to the motor 13. In the present embodiment, the motor 13 and the spindle 19 have a common rotation axis Y1.

  The arm member 14 is rotatably supported by the support shaft member 16. One end of the arm member 14 rotatably holds a spindle 19, and the grinding wheels 11 and 12 are mounted on the spindle 19 via a grinding wheel flange 20. Further, the spindle of the motor 13 is directly connected to the spindle 19. The spindle 19 may be connected to the main shaft of the motor 13 via a belt or the like.

  The servo mechanism 15 includes a servomotor 17 that rotatably drives the arm member 14 around the support shaft member 16, a link mechanism 18 that connects the pivot shaft 17a of the servomotor 17 and the arm member 14, and a control unit (Not shown). The link mechanism 18 has a first link member 18a and a second link member 18b. One end of the first link member 18a is fixed to the pivot shaft 17a of the servomotor 17, and the other end is rotatably coupled to one end of the second link member 18b via the first joint 18c. There is. The other end of the second link member 18b is rotatably connected to the other end of the arm member 14 via the second joint 18d.

  In this case, when the rotary shaft 17a of the servomotor 17 is rotated clockwise, the arm member 14 is also rotated clockwise about the support shaft member 16 by the link mechanism 18 if the upper grindstones 11 and 12 in FIG. Do. Along with this, the force with which the grindstones 11 and 12 press the end face 2 of the glass plate 1 decreases. On the other hand, when the pivot shaft 17 a of the servomotor 17 rotates counterclockwise, the link mechanism 18 rotates the arm member 14 counterclockwise around the support shaft member 16. Along with this, the force with which the grindstones 11 and 12 press the end face 2 of the glass plate 1 increases.

  The control unit monitors the speed, torque and position of the pivot shaft 17 a of the servomotor 17. By rotating the rotation shaft 17 a of the servomotor 17 according to the speed, torque and position, the position and pressing force of the grinding wheels 11 and 12 are controlled.

  The grinding wheel 11 (12) is attached to the spindle 19 via a grinding wheel flange 20, as shown in FIG. If it explains in full detail, fitting hole 21 is provided in whetstone 11 (12), and fitting convex part 22 is provided in whetstone flange 20. As shown in FIG. The grindstone 11 (12) and the grindstone flange 20 are provided with one or more screw holes 23, 24, respectively. In this case, the fitting convex portion 22 of the grindstone flange 20 is fitted into the fitting hole 21 of the grindstone 11 (12), and the bolt 25 is screwed into and tightened with the screw holes 23 and 24 to obtain the grindstone 11 (12). Are connected to the grinding wheel flange 20.

  Further, in the grindstone flange 20, a fitting recess 26 is provided on the side opposite to the fitting protrusion 22. The fitting recess 26 has a tapered shape, and can be fitted in a tapered manner with the tip end portion 27 of the spindle 19 which also has a tapered shape. Therefore, for example, after preparing the rotary tool 28 which is an integral product of the grindstone 11 (12) and the grindstone flange 20 in the preparation step S1 described later, the rotary tool 28 is attached to the tip 27 of the spindle 19 automatically. Centering (positioning) of the grinding wheel 11 (12) with respect to the spindle 19 is performed.

  Further, in the present embodiment, two types of processing (grinding with the main purpose of chamfering the end face 2 as to the end face 2 of the glass plate 1 and equalization of minute unevenness of the end face 2 being the main purpose) Corresponding grinding wheels 11 and 12 can be used to apply the polishing process. That is, the grain size of the abrasive grains in the second grinding wheel 12 for polishing is the same as or larger than the grain size of the abrasive grains in the first grinding stone 11. The grain size of the abrasive grains in the first grindstone 11 for grinding may be, for example, # 100 to # 1000, and the grain size of the abrasive grains in the second grindstone 12 for grinding may be, for example, # 200 to # 1000. be able to. Moreover, the diameter of the grindstones 11 and 12 is 100-200 mm, for example.

  The two grindstones 11 (12) are one set, and as shown in FIG. 2, one or more sets of the grindstones 11 (12) are disposed at opposing positions across the glass plate 1. In FIG. 2, a set of first grinding wheels 11, 11 and a set of second grinding wheels 12, 12 are arranged. In this case, the motor 13, the arm member 14, the servo mechanism 15, the spindle 19, the grindstone flange 20 and the like necessary for the drive control of the grindstones 11 (12) are arranged in the grindstones 11 and 12.

  The glass plate 1 to be processed by the end surface processing apparatus 10 has, for example, a rectangular shape as shown in FIG. The thickness dimension of the glass plate 1 is preferably, for example, 0.05 mm to 10 mm, and more preferably 0.2 mm to 0.7 mm. Of course, the glass plate 1 to which the present invention can be applied is not limited to the above embodiment. For example, the present invention can be applied to a glass plate having a shape (e.g., a polygon) other than a rectangular shape or a glass plate having a thickness dimension outside of 0.05 mm to 10 mm. The glass plate 1 mentioned above is obtained by acquiring a shaping | molding original plate by well-known shaping | molding means, such as the down draw method, for example, and cutting out the glass plate 1 from a shaping | molding original plate.

  The glass plate 1 can move relative to the grinding wheels 11 and 12 in a predetermined feed direction X (left direction in FIG. 2). Although FIG. 2 shows the case where the glass plate 1 moves in the feed direction X and the grindstones 11 and 12 are fixed, it goes without saying that the glass plate 1 is fixed and the grindstones 11 and 12 are in the feed direction X May move in the opposite direction. At this time, one of the glass plate 1 and the grindstones 11 and 12 may move, and the other may be fixed, or both may move.

  Further, although the rotation direction of the grinding wheels 11 and 12 is arbitrary, it is preferable to determine the rotation direction of each grinding wheel 11 and 12 so as to rotate in the direction opposite to the feeding direction X of the glass plate 1, for example. Referring to FIG. 2, it is preferable to set the rotational directions of the grinding wheels 11 and 12 so that the upper grinding wheels 11 and 12 are counterclockwise and the lower grinding wheels 11 and 12 are clockwise.

  Next, an example of end face processing to end face 2 of glass board 1 using end face processing device 10 of the above-mentioned composition is explained.

  First, the grindstones 11 and 12 in the rotated state are disposed at predetermined positions by rotation of the servomotor 17. In this state, the glass plate 1 is conveyed along the feed direction X, and the grindstones 11 and 12 are brought into contact with the end face 2 of the glass plate 1. At the start of this processing (at the time of processing of the portion indicated by reference numeral 2 a), the whetstones 11 and 12 tend to be separated from the glass plate 1 by the impact accompanying the contact between the whetstones 11 and 12 and the end face 2 of the glass plate 1. In order to cope with this, the control unit performs feedback control (for example, PID control) of the speed and torque of the rotation shaft 17 a of the servomotor 17. Specifically, the control unit detects the movement of the arm member 14 that moves with the grinding wheels 11 and 12 based on the speed of the rotation shaft 17 a of the servomotor 17. In accordance with the detection result, the control unit controls the speed and torque of the pivot shaft 17 a of the servomotor 17 so as to suppress the movement of the arm member 14. Thereby, the pressing force of the grindstones 11 and 12 is adjusted so that the grindstones 11 and 12 are not separated from the end face 2 of the glass plate 1. For this reason, bounding of the grindstones 11 and 12 at the start of processing can be prevented.

  In the processing of the middle part in the transport direction (the part between the part shown by 2a and the part shown by 2b) of the end face 2 of the glass plate 1, the speed and torque of the rotation shaft 17a of the servomotor 17 Perform feedback control. At that time, the ratio of speed control and torque control is changed to increase the ratio of torque control. The change of the ratio can be implemented by changing the setting of the gain. Thereby, the pressure of the grindstones 11 and 12 with respect to the end surface 2 of the glass plate 1 is maintained constant, and the processing amount of the end surface 2 can be maintained constant in the conveyance direction.

  When the end face processing described above is completed, the contact between the grindstones 11 and 12 and the end face 2 of the glass plate 1 is released, so that the torque of the pivot shaft 17a of the servomotor 17 decreases sharply. For this reason, at the time of processing completion (at the time of processing of the portion indicated by reference numeral 2b), the control unit performs feedback control of the speed and torque of the rotation shaft 17a of the servomotor 17 so that the positions of the grindstones 11 and 12 become constant. .

  Thus, according to the end face processing apparatus 10 shown in FIG. 2 and FIG. 3, the bounding of the grindstones 11, 12 at the start of processing can be prevented, and the processing amount of the end face 2 of the glass plate 1 can be maintained constant in the transport direction. Cleaning, inspection, packing, etc. are performed on the glass plate 1 after end face processing as needed. Thereby, a glass plate as a product or a glass plate package is completed.

  Subsequently, the preparation step S1 of the rotary tool 28 used for the end face processing apparatus 10 described above will be described mainly based on FIGS. 4 to 12. In the following description, the first grindstone 11 for grinding is simply referred to as "the grindstone 11", and the case where the rotary tool 28 is prepared by positioning and fixing the grindstone 11 on the grindstone flange 20 will be described as an example. Of course, the second grinding wheel 12 for polishing can be similarly prepared.

  In the preparation step S1 according to the present embodiment, as shown in FIG. 4, a mounting step S11 of attaching the grindstone 11 to the grindstone flange 20 and a shake for measuring the static runout amount of the grindstone 11 attached to the grindstone flange 20. Amount measurement step S12, correction necessity determination step S13 for determining necessity of position correction of the grinding wheel 11 based on the measured static deflection amount, position correction step S14 for correcting the position of the grinding wheel 11 with respect to the grinding wheel flange 20 And a grindstone holding step S15 for holding the grindstone 11 in a state of being positioned, and a grindstone fixing step S16 for fixing the grindstone 11 to the grindstone flange 20. First, details of the positioning and fixing device 30 used for operations from the deflection amount measuring step S12 to the grinding stone fixing step S16 will be described, and then the details of the steps S11 to S16 will be described in order.

  As shown in FIG. 5, the positioning and fixing device 30 measures a rotary drive device 31 for rotating the grinding wheel flange 20 to which the grinding wheel 11 is attached, and a deflection measuring device 32 for measuring the static deflection of the grinding wheel 11. A moving device 33 for moving the grinding wheel 11 in accordance with the static shake amount, and a control device 34 are provided. Further, in the present embodiment, the positioning and fixing device 30 further includes a holding device 35 capable of holding the grindstone 11 at a predetermined position.

  The rotational drive device 31 has a spindle 36 and a first servomotor 37 that rotationally drives the spindle 36. One longitudinal end (the lower end in FIG. 5) of the spindle 36 and the first servomotor 37 are coaxially connected via a coupling 38. Further, a tapered tip 39 is provided at the other end (the upper end in FIG. 5 in the case of FIG. 5) of the spindle 36 in the longitudinal direction, and the tip 39 and the fitting recess 26 of the grinding wheel flange 20 taper-fit Thus, the grinding wheel flange 20 is positioned and fixed to the spindle 36 in a state where the central axis of the grinding wheel flange 20 substantially coincides with the spindle 36 and the rotation axis Y2 of the first servomotor 37. Here, “substantially match” does not require that the central axis and the rotation axis Y 2 be completely matched, but a slight deviation which is acceptable (as a matter of course) Is smaller than the deviation between the central axis with the grinding wheel flange 20).

  The runout measuring device 32 can measure the static runout of the reference surface of the grinding wheel 11. As the reference surface, for example, the concentricity ensuring surface 11 a provided on the grindstone 11 can be used. The concentricity ensuring surface 11a is an inner peripheral surface or an outer peripheral surface whose concentricity with the outer peripheral surface to be processed is guaranteed. In the present embodiment, a displacement sensor 40 for measuring the displacement in the radial direction of the concentricity ensuring surface 11a located on the upper inner periphery of the grindstone 11, a first moving portion 41 for moving the displacement sensor 40 in the horizontal direction, and displacement And a second moving unit 42 configured to move the sensor 40 in the vertical direction. A known displacement sensor can be used as the displacement sensor 40, but from the viewpoint of stably measuring the radial displacement of the reference surface (here, the concentricity ensuring surface 11a) of the grinding wheel 11, a contact type is used. A displacement sensor is preferred, and in this case, a displacement sensor of the type which measures its displacement while constantly urging it against the concentricity assurance surface 11a.

  The moving device 33 is capable of moving the grindstone 11 in a predetermined direction, for example, from the radially outer side toward the center side, and in the present embodiment, as shown in FIG. On the imaginary straight line Z intersecting the rotational axis Y2) of the spindle 36, one having a structure that pushes the grindstone 11 toward the central axis of the grindstone flange 20 is used. In this case, as shown in FIG. 5, for example, the moving device 33 is connected to the second servomotor 43, the motion direction converter 44 connected to the second servomotor 43, and the motion direction converter 44. It comprises a linear motion unit 45 and a head unit 46. In this case, the rotational driving force from the second servomotor 43 is converted into a linear direction force by the movement direction conversion unit 44, and the head unit 46 attached to the linear movement unit 45 receives this linear direction force. It is supposed to do linear motion. Note that, for example, a ball screw or the like can be used as the movement direction conversion unit 44, and a linear movement guide (linear drive bearing guide) having a rail unit 47 and a stroke unit 48, for example, is used as the linear movement unit 45. be able to. In this case, the head portion 46 is attached to the stroke portion 48 of the linear motion portion 45.

  The control device 34 controls the driving of the first and second servomotors 37 and 43. In the present embodiment, the control device 34 responds to the static shake amount (maximum swing width of the displacement amount) measured by the displacement sensor 40. The drive of the first and second servomotors 37 and 43 can be controlled. In this case, the control device 34 receives the displacement amount of the concentricity guarantee surface 11 a measured by the displacement sensor 40 and simultaneously receives the phase from the detector 37 a of the first servomotor 37, thereby causing the displacement sensor 40 to The measured displacement amount is associated with the phase (circumferential position, for example, angle) of the grindstone 11 when the displacement amount is measured. For example, although the details will be described later, when the measured displacement amount is maximized (when the distance from the central axis of the grindstone flange 20 to the reference surface of the grindstone 11 (concentricity guarantee surface 11a) is maximized) To send the drive command to the first servo motor 37 so that the circumferential direction position of the motor is positioned on the imaginary straight line Z, and the moving device 33 pushes the grindstone 11 by a half of the static deflection amount described later The drive command can be transmitted to the second servomotor 43. As a result, the portion of the grindstone 11 where the displacement amount is maximum is pushed by the moving device 33 toward the central axis of the grindstone flange 20 and moves.

  The holding device 35 is configured of, for example, a cylinder 49, and is disposed at a position facing the moving device 33 via the grinding wheel 11 (see FIG. 6). In this case, the head portion 50 of the cylinder 49 is movable in the direction along an imaginary straight line Z intersecting the central axis of the grinding wheel flange 20. Further, although the reason will be described later, it is desirable that the thrust (in particular, the forward force) of the cylinder 49 be smaller than that of the head portion 46 of the opposed linear motion portion 45.

  Next, an example of preparation process S1 of the rotary tool 28 using the positioning fixing device 30 of the said structure is demonstrated based on FIGS. 4-12.

(S11) Mounting Step In this preparation step S1, first, the grindstone 11 and the grindstone flange 20 constituting the rotary tool 28 are prepared respectively (mounting step S11 shown in FIG. 4). Then, the grinding wheel 11 is attached to the grinding wheel flange 20 by fitting the fitting hole 21 of the grinding wheel 11 and the fitting convex portion 22 of the grinding wheel flange 20. The grindstone flange 20 to which the grindstone 11 is attached is attached to the tip end 39 of the spindle 36 of the positioning and fixing device 30 via a taper fitting, as shown in FIG. As a result, the grindstone 11 and the grindstone flange 20 can be rotationally driven by the first servomotor 37 in a state where the central axis of the grindstone flange 20 and the rotation axis Y2 of the spindle 36 substantially coincide with each other. At this stage, the fit between the grindstone 11 and the grindstone flange 20 is a so-called clearance fit, and the relative position between the grindstone 11 and the grindstone flange 20 in the radial direction is changed by applying a predetermined load to the grindstone 11, for example. It is in the state of gaining.

(S12) Static runout measurement step Subsequently, the runout measurement unit 32 measures the static runout of the grinding wheel flange 20 in a state where the grindstone 11 is attached (runout measurement step S12 shown in FIG. 4). In the present embodiment, the static runout amount on the concentricity guarantee surface 11 a of the grindstone 11 is measured by the displacement sensor 40 of the runout measuring device 32 while rotating the grindstone flange 20 by the rotational drive device 31. Specifically, as shown in FIG. 7, the displacement sensor 40 is lowered by the second moving unit 42 and horizontally moved by the first moving unit 41 to abut the concentricity guarantee surface 11 a of the grindstone 11. . And while rotating the grindstone 11 in a state of being attached to the grindstone flange 20 by the rotational drive of the first servomotor 37 about the central axis of the grindstone flange 20 (substantially around the rotation axis Y2 of the spindle 36), the concentricity is The displacement of the securing surface 11 a in the radial direction is measured by the displacement sensor 40.

  The measurement operation described above is performed by rotating at least one grinding wheel 11. The rotational speed of the grinding wheel 11 (rotational speed of the first servomotor 37) at this time is set to a size (about several tens rpm) such that the dynamic balance of the grinding stone 11 or the like does not affect the measurement result. Ru. Also, during the measurement operation, the displacement amount of the concentricity guarantee surface 11a measured by the displacement sensor 40 is transmitted to the control device 34, and the phase from the first servomotor 37 (ie, with the first servomotor 37). The phase (for example, the angle) of the grindstone 11 rotating in synchronization is transmitted to the controller 34. At this time, the control device 34 obtains the relationship between the phase (circumferential position) of the grindstone 11 and the displacement amount in each phase as shown in FIG. Then, from this relationship, the maximum swing width of the displacement amount (the difference between the maximum value A1 and the minimum value A2), that is, the static deflection amount L is derived, and the phase of the grindstone 11 when the displacement amount takes the maximum value A1. Derivate P1. In FIG. 8, the vertical axis indicates the magnitude of the displacement amount on the concentricity ensuring surface 11 a, and means that the larger the distance in the positive direction (upward), the further away from the central axis of the grindstone flange 20. . Further, the relationship between the phase of the grindstone 11 and the displacement amount shown in FIG. 8 is obtained by extracting one cycle (360 °) from the measurement result.

  In the present embodiment, the case where the concentricity guarantee surface 11a is on the inner periphery of the grindstone 11 is exemplified, but even if the concentricity guarantee surface 11a is on the outer periphery of the grindstone 11, the same steps as described above It is possible to execute S12. That is, as shown in FIG. 9, when the concentricity guarantee surface 11a 'having a cylindrical shape is provided on the outer periphery of the grindstone 11', the displacement sensor 40 is moved outward in the radial direction of the grindstone 11 'by the first moving portion 41. The concentricity assurance surface 11a 'is moved by moving the second moving unit 42 down to the same height as the concentricity assurance surface 11a' and bringing the displacement sensor 40 into contact with the concentricity assurance surface 11a '. It is possible to measure the static runout amount of the grinding wheel 11 ′ in

(S13) Correction Necessity Determination Step After the static shake amount is measured in this manner, it is determined whether to correct the position of the grindstone 11 based on the static shake amount (correction required shown in FIG. 4). No determination step S13). Specifically, control device 34 automatically determines whether static shake amount L (FIG. 8) derived based on the measured displacement amount is equal to or less than a preset threshold value. . Then, when the static shake amount L is larger than the threshold (in the case of No in FIG. 4), the process proceeds to the position correction step S14. If the static shake amount L is equal to or less than the threshold (in the case of Yes in FIG. 4), the process proceeds to the grinding stone holding step S15 without passing through the position correction step S14.

(S14) Position Correction Step In this step S14, the movement device 33 changes the position (relative position) of the grindstone 11 to the grindstone flange 20 to correct the position of the grindstone 11 to the grindstone flange 20. Specifically, first, the grindstone 11 is moved toward the central axis of the grindstone flange 20 so that the static shake amount L of the grindstone 11 obtained in the static shake amount measurement step S12 approaches zero. In the present embodiment, since the moving device 33 is configured to push the grindstone 11 toward the central axis of the grindstone flange 20 on the virtual straight line Z (see FIG. 6) intersecting with the central axis of the grindstone flange 20 The control device 34 is the first one such that the phase P1 (see FIG. 8) of the grindstone 11 when the displacement amount of the concentricity guarantee surface 11a measured by the sensor 40 takes the maximum value A1 is on the imaginary straight line Z. The servomotor 37 is drive-controlled to rotate the grinding wheel 11 around the central axis of the grinding wheel flange 20 (see FIG. 10). Assuming that the phase at the completion of measurement is P0 (see FIG. 8), the amount of rotation (rotation angle) of the grindstone 11 is P1−P0 (0 ≦ P1−P0 <2π). As a result, since the portion of the grindstone 11 where the displacement amount is maximum is disposed in front of the moving device 33, it is possible to push and move the portion by the moving device 33.

  After that, the second servomotor 43 of the moving device 33 is driven to transmit the force in the linear direction to the linear motion unit 45 via the motion direction conversion unit 44 and is connected to the stroke portion 48 of the linear motion unit 45 The head portion 46 is advanced toward the central axis of the grinding wheel flange 20, that is, the rotation axis Y2 (see FIG. 11). As a result, a portion of the grindstone 11 where the displacement amount is maximum is pushed by the moving device 33 toward the central axis of the grindstone flange 20. At this time, the control device 34 performs a second operation such that the amount of forward movement of the head portion 46 from the state of contact with the grindstone 11 becomes one half of the static shake amount L measured in the static shake amount measurement step S12. By controlling the rotational drive amount of the servomotor 43, the grindstone 11 moves toward the central axis of the grindstone flange 20 by a distance equal to or half of the static shake amount L. After moving the grindstone 11, the head unit 46 of the moving device 33 is retracted. In addition, the displacement sensor 40 can detect the state which the head part 46 contact | abutted to the grindstone 11, for example. In this case, the head portion 46 is pressed against the grindstone 11 in a state where the displacement sensor 40 is in contact with the concentricity guarantee surface 11 a. When the head portion 46 abuts on the grindstone 11, the measurement value of the displacement sensor 40 (displacement amount of the grindstone 11) starts to fluctuate. Based on the start of this fluctuation, it is possible to detect the state in which the head portion 46 is in contact with the grindstone 11.

  Thus, after moving the grindstone 11 toward the central axis of the grindstone flange 20 by the moving device 33, the process returns to the static shake amount measurement step S12 to measure the static shake amount of the grindstone 11 (see FIG. 4). reference). Then, it is determined again whether to correct the position of the grindstone 11 based on the measured static shake amount L (correction necessity determination step S13). Here, when the measured static shake amount L (FIG. 8) is larger than the threshold value, the control device 34 executes the position correction step S14, the static shake amount measurement step S12, and the correction necessity determination step S13 again. Do. In other words, the above-described series of steps S14, S12, and S13 are repeatedly executed until the static shake amount L becomes equal to or less than the threshold value. Thereby, the positioning (so-called centering) of the grinding wheel 11 in the radial direction with respect to the grinding wheel flange 20 is completed. The series of steps S12 to S14 are automatically performed by the control device 34 (including the positioning and fixing device 30).

(S15) Grinding stone holding step When the static shake amount L is determined to be equal to or less than the threshold value through the above steps, the grinding stone 11 is held by the moving device 33 and the holding device 35. This holding may be performed, for example, in the state (the state shown in FIG. 11) when the movement of the grinding stone 11 is completed in the position correction step S14 last performed. Specifically, in the final position correction step S14, the grindstone 11 is rotated so as to have a phase when the grindstone 11 is moved by the moving device 33. Thereafter, in the final position correction step S14, the head portion 46 of the moving device 33 is advanced to a position where the grindstone 11 is moved by a distance close to or half of the static shake amount L. In this state, the head portion 50 of the cylinder 49 disposed at a position facing the moving device 33 (head portion 46) via the grindstone 11 is advanced toward the central axis of the grindstone flange 20 on the imaginary straight line Z. Thereby, the grindstone 11 is clamped by the head part 46 of the movement apparatus 33, and the head part 50 of the holding apparatus 35 (refer FIG. 12). In this case, since the grindstone 11 is held in a state where the movement of the grindstone 11 is completed in the position correction step S14 last performed, the grindstone 11 can be held in a state in which positioning is reliably performed.

  When moving the head unit 50 of the holding device 35 forward, the head (forward force) of the head unit 50 of the holding device 35 is set smaller than the thrust of the head unit 46 of the moving device 33. When 50 contacts the whetstone 11, the whetstone 11 can be prevented from moving to the moving device 33 side.

(S16) Grinding wheel fixing step In this step, the grinding wheel 11 is fixed to the grinding wheel flange 20. Although the fixing means of the grindstone 11 is optional, in the present embodiment, for example, as shown in FIG. 5, screw holes 23 provided at one or more (for example, three) circumferential directions of the grindstone 11 and the grindstone flange 20, By screwing and fastening a bolt (FIG. 3) to 24, the grindstone 11 is fixed to the grindstone flange 20 in a state of being positioned. As a result, the fixing with the positioning of the grindstone 11 in the radial direction with respect to the grindstone flange 20 is completed, and the rotary tool 28 formed by integrating the grindstone 11 and the grindstone flange 20 is completed. The completed rotary tool 28 is removed from the spindle 36 of the positioning and fixing device 30, mounted on the spindle 19 (FIG. 2) of the end face processing apparatus 10, and used for end face processing of the glass sheet 1.

  In addition, after integrating the grindstone 11 and the grindstone flange 20, the static runout amount of the grindstone 11 is measured while rotating the rotary tool 28 with the first servo motor 37 for confirmation (static runout amount In the measurement step S12), it may be determined whether the measured static shake amount L is equal to or less than a threshold (correction necessity determination step S13). If the displacement of the grinding wheel 11 has occurred due to bolt tightening or the like (if the static deflection amount L is larger than the threshold value), the bolt is removed and steps S12 to S14 are repeated again, and then step S15 and It is preferable to proceed to step S16. In this case, when removing the bolt, if necessary, the grinding wheel 11 and / or the grinding wheel flange 20 may be replaced with another one.

  As described above, in the manufacturing method according to the present invention, the static runout amount of the grindstone 11 attached to the grindstone flange 20 is measured by the runout amount measuring device 32 in the preparation step S1 of the rotary tool 28 used for the end face processing. The moving device 33 for moving the grinding wheel 11 moves the grinding wheel 11 according to the static deflection amount L obtained by the measurement, so that the position of the grinding wheel 11 with respect to the grinding wheel flange 20 is corrected. As described above, by performing both the measurement of the static runout amount and the movement of the grinding wheel 11 according to the static runout amount L with a machine (runout amount measuring device 32, moving device 33), a constant speed and the same speed are always obtained. It is possible to automatically correct the position of the grindstone 11 according to the measured value of the static shake amount L by the procedure. Thereby, the grindstone 11 can be positioned and fixed at a constant accuracy regardless of the degree of skill of the worker. In addition, if the grinding wheel 11 is moved by the moving device 33 according to the measured value of the static runout L, the movement amount of the grinding wheel 11 is also stable compared to manual work, so the grinding wheel 11 can be stabilized with less man-hours. It can be moved. Therefore, it is possible to stably carry out a series of operations for positioning and fixing in a short time.

  Further, in the present embodiment, the rotary drive unit 31 and the moving unit 33 of the grinding wheel flange 20 are both driven by the servomotors (first and second servomotors 37 and 43), and these first and second servomotors 37 , 43 is controlled by the control device 34. Therefore, as described above, measurement of the static deflection L and static deflection until the static deflection L of the grinding wheel 11 becomes equal to or less than the target value. The movement of the grinding wheel 11 according to the amount L can be automatically and repeatedly performed. Therefore, it is possible to prepare the target static balance rotary tool 28 for a short time to anyone.

  As mentioned above, although 1st embodiment of this invention was described, of course, the manufacturing method of the glass plate 1 which concerns on this invention, and the positioning fixing device 30 of the grindstone 11 are not limited to the form of the said illustration. The manufacturing method and the fixing device 30 can take various forms within the scope of the present invention.

  For example, in the above embodiment, the head portion 46 of the moving device 33 and the head portion 50 of the holding device 35 are both in a flat surface (see FIG. 6 etc.). Of course, the mode of contact with the grindstone 11 is not limited to this. For example, as shown in FIG. 13, the head 51 of the moving device 33 and the head 52 of the holding device 35 both extend in an oblique direction and bifurcatedly with respect to the imaginary straight line Z. It is good also as a form which contact | abuts with the grindstone 11 in two places remove | deviate from the top (2nd embodiment of this invention). Alternatively, as shown in FIG. 14, flat portions 53a, 54a in which the head portion 53 of the moving device 33 and the head portion 54 of the holding device 35 both extend in the direction orthogonal to the imaginary straight line Z, and the flat portions 53a, A pair of projecting portions 53b and 54b that protrude toward the grindstone 11 from both sides in the longitudinal direction of 54a are provided, and the grindstone 11 is respectively separated from the imaginary straight line Z (one place) and the imaginary straight line Z It is good also as a form which abuts. The point is that as long as the grindstone 11 can be pressed stably along the imaginary straight line Z, it is possible to adopt any of the head portions 46, 50, 51 to 54 having an arbitrary form.

  Further, regarding the moving device 33, in the above embodiment, the grinding wheel 11 is moved toward the central axis of the grinding wheel flange 20 by pushing the grinding wheel 11 toward the central axis of the grinding wheel flange 20. The grinding wheel 11 may be moved in a mode other than this. For example, although not shown, the hook portion is engaged with the grindstone 11, and the grindstone 11 is moved by pulling the hook portion so that the portion engaged with the grindstone 11 approaches the central axis of the grindstone flange 20. You may Alternatively, the grinding wheel 11 may be moved by holding a plurality of places in the circumferential direction of the grinding wheel 11 from the top by a chuck and moving the chuck toward the central axis of the grinding wheel flange 20.

  Moreover, regarding the holding | maintenance apparatus 35, although the case where the grindstone 11 was hold | maintained by cooperation (specifically pinching) with the moving apparatus 33 was illustrated in the said embodiment, of course the aspect other than this, for example, holding | maintenance apparatus 35 alone You may hold the grindstone 11 in the positioned state. In this case, although illustration is omitted, the holding device 35 may be configured by a pair of cylinders that move the grindstone 11 linearly along the direction orthogonal to the imaginary straight line Z, and the grindstone 11 may be held by the pair of cylinders .

  Further, regarding the static runout measurement step S12, in the above embodiment, while rotating the grindstone flange 20 attached with the grindstone 11 around the rotation axis Y2 of the spindle 36, the reference sensor of the grindstone 11 (concentricity guarantee Although the case where the static runout amount L of the grindstone 11 was measured was illustrated by making it contact | abut on surface 11a, of course, it is not restricted to this. By fixing the grindstone flange 20 and rotating the displacement sensor 40 around the rotation axis Y2 from the state in which the displacement sensor 40 is in contact with the predetermined surface of the grindstone 11, the static runout L of the concentricity guarantee surface 11a is obtained. It may be measured. In the present embodiment, the case of measuring the static shake amount L of the predetermined surface of the grindstone 11 using the displacement sensor 40 as the shake amount measuring device 32 has been exemplified, but of course, sensors other than the displacement sensor 40, for example, a position A sensor (not shown) may be used to measure the static deflection L, or a non-contact type sensor (not shown) may be used to rotate either the grinding wheel 11 or the sensor around the rotation axis Y2. The static shake amount L may be measured by performing this. Alternatively, the static shake amount L of the grindstone 11 is obtained (measured) by performing predetermined processing on an image obtained by imaging the grindstone 11 in a stationary state from above with an imaging device (not shown) such as a camera. It does not matter.

  Moreover, although the case where two different types of grindstones 11 and 12 were arrange | positioned one by one at the position which opposes on both sides of the glass plate 1 was illustrated in the said embodiment, of course, it is also possible to take arrangement modes other than this. is there. For example, it is also possible to arrange two sets or three or more sets of the grindstones 11 and 12 at opposing positions across the glass plate 1. Also, as long as the required quality can be secured for the end face 2 after end face processing, for example, only one kind of whetstone 11 (12) is arranged in a pair or a plurality of pairs at opposing positions across the glass plate 1 It is also possible.

  Further, in the above embodiment, the so-called constant pressure type manufacturing method is exemplified in which the end face 2 is processed in a state in which the contact pressure (pressing force) between the grindstone 11 (12) and the end face 2 is maintained at a constant magnitude. When adopting a so-called fixed-type manufacturing method in which the end face 2 is processed in a state in which the position of the grindstone 11 (12) in the width direction of the glass plate 1 (direction orthogonal to the feed direction X) is fixed. It is also possible to apply the present invention. Moreover, when using a constant pressure type and a fixed type together, it is also possible to apply this invention. Furthermore, the constant pressure type is not limited to the method in which the servomotor 17 as shown in FIG. 2 applies the couple to the arm member 14 via the link mechanism 18, and may be performed by another method. As another method, for example, a method in which a force is applied to the arm member by a cylinder can be adopted.

Reference Signs List 1 glass plate 2 end face 10 end face processing device 11, 12 whetstone 11 a concentricity guarantee surface (reference surface)
Reference Signs List 13 motor 14 arm member 15 servo mechanism 16 support shaft member 17 servo motor 18 link mechanism 19 spindle 20 grindstone flange 21 fitting hole 22 fitting convex portion 28 rotary tool 30 positioning and fixing device 31 rotational drive device 32 runout measuring device 33 movement Device 34 Controller 35 Holding device 36 Spindle 37 First servo motor 40 Displacement sensor 43 Second servo motor 44 Motion direction conversion unit 45 Linear motion unit 46, 51, 53 Head unit (moving device)
47 rail 48 stroke 49 cylinder 50, 52, 54 head (holding device)
L Static runout P0, P1 Phase S11 Grinding wheel installation step S12 Static runout measurement step S13 Correction necessity determination step S14 Position correction step S15 Grinding wheel holding step S16 Grinding wheel fixing step Y1, Y2 Rotation axis Z Virtual straight line

Claims (9)

Preparing the rotary tool in which the grinding wheel and the grinding wheel flange are integrated by fixing the grinding wheel to the grinding wheel flange while the grinding wheel is positioned relative to the grinding wheel flange;
It is a manufacturing method of a glass board provided with the end face processing process which performs predetermined processing to the end face of a glass board using the above-mentioned rotary tool,
The preparation process is
A runout amount measuring step of measuring a static runout amount of the grindstone attached to the grindstone flange by a runout amount measuring device using a reference surface of the grindstone;
A method of manufacturing a glass sheet, comprising: a moving device for moving the whetstone moving the whetstone according to the static deflection amount to correct the position of the whetstone relative to the whetstone flange.   The static runout amount is measured by the runout amount measuring device while rotating the grinding wheel flange in a state where the grindstone is attached by a rotational drive device in the runout amount measurement step, with the rotational drive device. Method of manufacturing glass plate.   3. The shake amount measuring step according to claim 2, wherein the grindstone flange is rotated by the rotational drive device while pressing the contact type displacement sensor against the reference surface using a contact type displacement sensor which the shake amount measuring device has. Method of manufacturing glass plate.   The method according to claim 2 or 3, wherein in the position correcting step, the moving device pushes the grindstone toward the central axis on an imaginary straight line intersecting the central axis of the grindstone flange.   In the runout measurement step, the circumferential direction position of the grinding wheel when the distance from the central axis of the grinding wheel flange to the reference surface is maximized is obtained, and in the position correction step, the circumferential direction position is the The method for manufacturing a glass sheet according to claim 4, wherein the grinding wheel flange is rotated by the rotary drive so as to be located on a virtual straight line intersecting the central axis. Driving the rotary drive by a first servo motor to rotate the grinding wheel flange;
The manufacturing method of the glass plate as described in any one of Claims 2-5 which drives the said movement apparatus by a 2nd servomotor, and moves the said grindstone. A controller controls the first servomotor and the second servomotor;
The glass according to claim 6, wherein the control device repeatedly executes the position correction step and the deflection amount measurement step by the first and second servomotors until the static deflection amount becomes equal to or less than a predetermined value. How to make a board.   The preparation step includes a grinding wheel holding step of holding the grinding wheel by cooperation of the moving device and a holding device in a state where the grinding wheel is positioned with respect to the grinding wheel flange, and the grinding wheel in a state holding the grinding wheel The manufacturing method of the glass plate as described in any one of Claims 1-7 which further have a grindstone fixing step which fixes these to the said grindstone flange. An apparatus for fixing a whetstone for performing predetermined end face processing on an end face of a glass plate by rotational contact to a whetstone flange with positioning.
A runout measuring device for measuring the static runout of the grinding wheel attached to the grinding wheel flange;
And a moving device for moving the grinding wheel,
The moving device is a positioning and fixing device of a grindstone which corrects the position of the grindstone with respect to the grindstone flange by moving the grindstone according to the static deflection amount.

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