JP2013188838A - Apparatus and method for processing sheet glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for processing sheet glass which can improve the yield of a succeeding step, while keeping the amount of the sheet glass to be conveyed to the succeeding step.SOLUTION: An apparatus for processing a sheet glass includes: a processing tool 11 for processing the sheet glass 20; a detector 12 for detecting the processing light generated when the sheet glass is processed by the processing tool 11; and a cover 13 for covering the processing tool 11. The detector 12 is disposed on the inside or outside of the cover 13. The detector 12 is a photoelectronic sensor, an optical fiber sensor, a radiation temperature sensor or an image pickup apparatus.

Description

  The present invention relates to a sheet glass processing apparatus and a sheet glass processing method.

  In order to prevent the occurrence of cracks and chipping from the end face of the plate glass after the cutting of the plate glass, a grinding process for grinding the end face of the plate glass is performed. In order to improve the processing efficiency of the plate glass, it is desirable to grind the plate glass under the conditions of a fast grindstone feed speed, a peripheral speed of the grindstone, and a large cutting amount. However, when processing plate glass with high processing efficiency, a load is applied to the grindstone or plate glass, and the plate glass may be chipped or burnt. The plate glass in which chipping or burning has occurred is liable to be damaged in a subsequent process on the downstream side of the grinding process, resulting in a production loss due to line stoppage or a reduction in glass quality. Therefore, a sheet glass in which chipping or burning has occurred is usually treated as a defective product.

  In the plate glass grinding process, when the plate glass is burnt or chipped, a phenomenon occurs in which the powder of the plate glass, the abrasive grains of the grindstone, or the binder of the grindstone burns and emits light like a spark due to grinding heat. For this reason, it is possible to prevent the generation of defective products by using the machining light as a guideline for occurrence of chipping and burning and performing the grinding process so that the machining light is not emitted. As such a processing method, for example, a grinding method described in Patent Document 1 is known. According to the grinding method of Patent Document 1, it is possible to perform chamfering with a high feed rate while suppressing the occurrence of sparks.

JP 2005-199365 A

  In addition to the processing method described in Patent Document 1, generation of processing light can be easily suppressed by setting processing conditions so that processing efficiency is lowered. For example, in order to prevent machining light from being emitted, it is effective to lower the feed speed of the machining conditions. However, processing efficiency is an important factor that affects the amount of plate glass that can be transported to a subsequent process. Although reducing the processing efficiency can prevent the occurrence of defective products in the grinding process and improve the yield of the post process, it is not desirable from the viewpoint of maintaining the amount of plate glass that can be transported to the post process. It has been a problem for those skilled in the art how to improve the yield of the post-process while securing the amount of plate glass that can be transported to the surface.

  This invention is made | formed in view of the said subject, The objective is providing the plate glass processing apparatus and plate glass processing method which can improve the yield of a post process, maintaining the quantity of the plate glass which can be conveyed to a post process. It is in.

  The plate glass processing apparatus of this invention is equipped with the processing tool which processes plate glass, and the detector which detects the process light which generate | occur | produces by processing the said plate glass with the said processing tool.

  In a certain embodiment, the plate glass processing apparatus of this invention is further equipped with the cover which covers the said processing tool, and the said detector is installed in the said cover or the said cover outside.

  In one embodiment, the detector is a photoelectric sensor, a fiber optic sensor, a radiation temperature sensor, or an imaging device.

  In one embodiment, the processing tool can be separated from the plate glass in response to detection of the processing light.

  In one embodiment, the processing tool and the plate glass are relatively movable when being processed into the plate glass.

  The plate glass processing method of this invention includes the process process which processes plate glass, and the detection process of detecting the process light which generate | occur | produces by processing the said plate glass at the time of the said process process execution.

  In one embodiment, the plate glass processing method of the present invention further includes a separation step of separating a processing tool for processing the plate glass from the plate glass in response to detection of the processing light.

  In one embodiment, in the processing step, the processing to the plate glass is performed while the processing tool and the glass move relatively.

  According to the plate glass processing apparatus and the plate glass processing method of the present invention, it is possible to detect processing light. For this reason, it becomes possible to take out the plate glass in which the processing light is generated, and the yield of the subsequent process can be improved. Moreover, since the good product of plate glass is conveyed to a post process, if the processing efficiency in a process process is raised, the quantity of plate glass which can be conveyed to a post process will increase. As a result, the yield of the post-process can be improved while maintaining the amount of plate glass sent to the post-process.

It is a schematic diagram which shows embodiment of the plate glass processing apparatus by this invention. It is a flowchart which shows embodiment of the plate glass processing method by this invention. It is the schematic diagram seen from the upper surface of the plate glass processing apparatus by this invention. It is the schematic diagram seen from the side of the plate glass processing apparatus by this invention. It is a schematic diagram which shows embodiment of the plate glass processing apparatus by this invention. It is a schematic diagram which shows embodiment of the plate glass processing apparatus by this invention. It is a flowchart which shows embodiment of the plate glass processing method by this invention.

  Hereinafter, with reference to drawings, the embodiment of the plate glass processing device and the plate glass processing method by the present invention is described. However, the present invention is not limited to the following embodiments.

  FIG. 1 is a schematic view showing an embodiment of a sheet glass processing apparatus 10 according to the present invention. The plate glass processing apparatus 10 is an apparatus for processing the plate glass 20 and includes a processing tool 11 and a detector 12. In the present embodiment, the plate glass 20 has a rectangular plate shape, and has an end surface 21 and a main surface 22. The plate thickness of the plate glass 20 is, for example, 0.05 mm to 10 mm. However, the present invention is not limited to this. The present invention can also be applied to processing of a glass sheet 20 having a shape other than a rectangle (for example, a polygon) and processing of a glass sheet 20 having a thickness other than 0.05 mm to 10 mm.

  The processing tool 11 processes the end surface 21 of the plate glass 20. The processing tool 11 moves relative to the plate glass 20 while performing processing. Typically, the processing tool 11 is driven to rotate by a driving device (for example, a motor) (not shown). The processing tool 11 moves relative to the glass sheet 20 along the feeding direction 31 (arrow direction shown in the figure) while rotating, and performs grinding on the end surface 21. The relative movement between the processing tool 11 and the glass sheet 20 is achieved by the movement of at least one of the processing tool 11 and the glass sheet 20. For example, the processing is performed in a state where the processing tool 11 is fixed to the plate glass 20 that moves along the feeding direction 31. Further, the processing tool 11 can perform processing while moving along the feeding direction 31 with respect to the plate glass 20 to be fixed. Furthermore, the processing tool 11 can perform processing while moving along the feed direction 31 with respect to the plate glass 20 that moves along the feed direction 31.

  The detector 12 detects the processing light. The processing light is generated by processing the glass sheet 20 with the processing tool 11. For example, the processing light is light generated by burning the powder of the processing tool 11 and the powder of the plate glass 20 during processing. The detection of the processing light by the detector 12 is a direct detection for detecting the generation of the processing light by detecting the light emission, or a change in other characteristics (a change other than the light emission) accompanying the generation of the processing light. Indirect detection for detecting the generation of machining light.

  In the case of direct detection, as the detector 12, a photoelectric sensor, an optical fiber sensor in which one end of an optical fiber is attached to a light receiving portion of the photoelectric sensor, or an imaging device is used. The photoelectric sensor may be an element having a photovoltaic effect such as a photodiode or a phototransistor, or may be a photoconductive cell whose resistance value varies depending on the amount of light such as a CdS cell. According to the element having the photovoltaic effect, a current is generated when sensing the processing light, and according to the photoconductive cell, the resistance value decreases and the output current increases when the processing light is detected. The generation of light can be detected. When an imaging device such as a CCD camera is used as the detector 12, the generated processing light is captured as an image, and the generation of processing light is detected by analysis of image analysis software.

  In the case of indirect detection, a radiation temperature sensor that can measure the temperatures of the processing tool 11 and the glass sheet 20 is used as the detector 12. As described above, since the processing light is a phenomenon in which components contained in the plate glass 20 or the grindstone 111 are burned by grinding heat and emit light, when the processing light is generated, high heat is generated in the processing tool 11 and the plate glass 20. If the temperature at which the processing light is generated is specified in advance according to the material and processing conditions and set as the reference temperature, the temperature of the processing tool 11 measured by the radiation temperature sensor is compared with the reference temperature, or the temperature of the plate glass 20 and the reference temperature. It is possible to detect the generation of machining light by comparing the temperature.

  FIG. 2 is a flowchart showing a plate glass processing method by the plate glass processing apparatus 10 of the present embodiment. Hereinafter, the plate glass processing method by the plate glass processing apparatus 10 is demonstrated. The plate glass processing method includes a processing step and a detection step, and is executed by steps S202 and S204.

  In step S202, a processing process is started and the glass sheet 20 is processed. Specifically, the end surface 21 of the plate glass 20 is processed by the processing tool 11. As described above, the processing tool 11 is the grindstone 111 that is rotationally driven, for example, and performs grinding on the end surface 21 of the plate glass 20 while the grindstone 111 rotates.

  In step S204, the detection process starts, and the detector 12 detects machining light generated during the machining process. Preferably, the detection step is executed together with the processing step. As described above, the detector 12 may be a photoelectric sensor, an optical fiber sensor, a radiation temperature sensor, or an imaging device, and can be appropriately selected as necessary. When the detector 12 detects processing light, a detection result is output.

  As described with reference to FIGS. 1 and 2, in the glass sheet processing apparatus 10 and the glass sheet processing method using the glass sheet processing apparatus 10 according to this embodiment, the processing light generated when the processing tool 11 processes the glass sheet 20 is detected by the detector. 12 can be detected. Thereby, it is possible to treat the plate glass 20 processed at the time of processing light detection as a defective product and take it out so as not to be conveyed to a downstream process downstream, so that the yield of the downstream process can be improved. Moreover, since the defective plate glass 20 is taken out and the non-defective plate glass 20 is conveyed to a subsequent process, the amount of the plate glass 20 that can be conveyed to the subsequent process increases if the processing efficiency in the processing process is increased. As a result, the yield of the post process can be improved while maintaining the amount of the plate glass 20 to be sent to the post process.

  Hereinafter, with reference to FIGS. 3-7, more concrete embodiment of the plate glass processing apparatus 10 by this invention is described.

<Embodiment 1>
3 is a schematic view seen from the top surface of the plate glass processing apparatus 10A, and FIG. 4 is a schematic view seen from the side surface of the plate glass processing apparatus 10A. The processing apparatus 10 </ b> A processes the plate glass 20 placed on the mounting table 40. The processing apparatus 10 </ b> A further includes a cover 13 and a nozzle 14 in addition to the processing tool 11 and the detector 12.

  The processing tool 11 may be a grindstone 111, for example. Specifically, the processing tool 11 is a grindstone 111 having a grinding surface 112 that is recessed from the outer peripheral surface. A chamfering process is performed on two edges of the end surface 21 of the glass sheet 20 by the grinding surface 112 of the grindstone 111. The processing tool 11 may be two grindstones that process each of the two edges of the end surface 21. In FIG. 1, only one processing tool 11 is provided, but the plate glass processing apparatus 10 may include a plurality of processing tools 11 arranged along the feeding direction 31, for example.

  The nozzle 14 supplies a processing liquid for cooling or lubrication to the processing tool 11 and the plate glass 20 when the plate glass 20 is processed. The cover 13 covers the processing tool 11, the detector 12, and the nozzle 14. Therefore, the chips derived from the processing tool 11 or the plate glass 20 and the processing liquid supplied from the nozzle 14 can be confined in the cover 13 so as not to scatter. Specifically, the cover 13 has an opening 131, and the plate glass 20 passes through the inside of the cover 13 through the opening 131 and is processed by the processing tool 11 in the cover 13.

  In the present embodiment, the detector 12 is installed in the cover 13. In this case, a photoelectric sensor, an optical fiber sensor, an imaging device, and a radiation temperature sensor are preferably used as the detector 12. Since the working fluid exists in the cover 13, it is preferable to take measures to prevent the liquid from entering the detector 12 so as not to malfunction.

<Embodiment 2>
In the embodiment described above, the detector 12 is installed in the cover 13, but the present invention is not limited to this.

  FIG. 5 is a schematic diagram showing an embodiment of a sheet glass processing apparatus 10B according to the present invention. The processing apparatus 10B includes a processing tool 11, a detector 12, a cover 13, and a nozzle 14, and is the same as that of the first embodiment described above with reference to FIG. 4 except that the installation position of the detector 12 is different. Because of this, duplicate description is omitted.

  In the present embodiment, the detector 12 is installed outside the cover 13. Specifically, the detector 12 is installed in a place away from the cover of the plate glass processing apparatus 10B. Alternatively, the detector 12 can be placed on the outer surface of the cover 13. When the detector 12 is installed outside the cover 13, it is preferable to use an imaging device or a radiation temperature sensor that can detect light even from a place at a certain distance as the detector 12. When the detector 12 is an imaging device or a radiation temperature sensor, the processing light can be detected at a position about 30 mm to 10 m away from the part where the plate glass 20 is processed. It is preferable to install the detector 12 outside the cover 13 because there is no influence of the processing liquid or the vibration due to the processing tool 10 is relatively small.

  In this embodiment, an optical fiber sensor can also be used as the detector 12. When using an optical fiber sensor, the optical fiber sensor body (photoelectric sensor) can be installed outside the cover 13 and the free end of the optical fiber can be installed inside the cover 13, so even if the internal space of the cover 13 is narrow. Since there is no electrical part in the optical fiber, there is no possibility of malfunction due to the penetration of the machining fluid, which is preferable.

  Embodiments of the glass sheet processing apparatuses 10A and 10B have been described with reference to FIGS. According to the processing apparatuses 10 </ b> A and 10 </ b> B, the processing light generated when the processing tool 11 processes the plate glass 20 can be detected by the detector 12. According to this detection result, it is possible to treat the plate glass 20 processed at the time of processing light detection as a defective product and take out the defective product of the plate glass 20 in another process so that it is not transported to a downstream downstream process. Become. Specifically, the detection result of the detector 12 is output to a take-out process between the machining process and a subsequent process on the downstream side of the machining process. The take-out process is executed by, for example, a take-out machine, and defective products of the plate glass 20 are taken out in the take-out process according to the detection result. Thereby, the yield of a post process can be improved without a defective product being conveyed to the post process. Moreover, since the defective plate glass 20 is taken out and the non-defective product of the plate glass 20 is conveyed to a subsequent process, if the processing efficiency is increased, the amount of the plate glass 20 to be sent to the subsequent process increases. As a result, the yield of the post process can be improved while maintaining the amount of the plate glass 20 to be sent to the post process. In addition, the defective product of the plate glass 20 taken out is reground, recovered or discarded.

  In the plate glass processing apparatuses 10A and 10B, when the detector 12 detects the processing light, the detection result is output and the plate glass 20 is taken out in another process, but the present invention is not limited to this. Depending on the detection result, the following appropriate measures can be taken in the processing step.

  (1) When processing light is detected, processing is immediately interrupted. Compared with the case where the processing is not interrupted, not only the possibility that the plate glass 20 being processed is chipped or burned but also the life of the processing tool 11 is extended.

  (2) When processing light is detected, the flow rate and flow velocity of the processing liquid for cooling the processing tool 11 and the plate glass 20 or for lubricating the processing tool 11 and the plate glass 20 are increased. By carrying out like this, processing heat can be reduced, generation | occurrence | production of the burning of the glass plate 20 during processing, or a chip | tip can be stopped, and the possibility that the glass plate 20 will become inferior goods can be reduced.

  (3) When processing light is detected, review processing conditions in the plate glass processing apparatus 10. The processing conditions are, for example, the degree of deterioration of the grindstone 111, the feed speed, the peripheral speed, and the cutting amount. The processing condition is, for example, the plate thickness of the plate glass 20. Furthermore, the processing conditions are, for example, the flow rate and flow rate of the processing liquid. By reviewing the processing conditions and changing them to more appropriate conditions, the occurrence of chipping or burning can be prevented, and the occurrence of defective products in the plate glass 20 processed after the plate glass 20 being processed can be prevented.

  (4) When processing light is detected, the state of the processing tool 11 is inspected. When the processing capability of the processing tool 11 decreases, the processing tool 11 is replaced or a process for recovering the processing capability is performed. For example, when the processing tool 11 is the grindstone 111, by performing dressing on the grindstone 111, the plate glass 20 processed after the plate glass 20 being processed can be prevented from being burned, and the occurrence of defective products can be prevented.

  (5) If processing light is detected, review processing conditions in the upstream process. When the size or material of the plate glass 20 is different from the plan, the processing conditions become inappropriate and processing light may be generated. For this reason, by changing the processing conditions in the upstream process to appropriate processing conditions, it is possible to prevent occurrence of chipping or burning in the plate glass 20 processed after the plate glass 20 being processed, and to prevent generation of defective products. .

  By dealing with the processing steps as described in (1) to (5) above, chipping or burning in the processing step by the processing tool 11 of the plate glass 20 is suppressed, and generation of defective products of the plate glass 20 is prevented. The For this reason, the yield of a process process can be improved and the quantity of the plate glass 20 which can be conveyed by a post process can be increased further. Furthermore, when processing light is detected, in addition to the above, it is possible to take measures to strengthen the inspection in the downstream process. By doing so, it is possible to prevent defective products of the plate glass 20 in which chipping or burning has occurred from being shipped as products.

<Embodiment 3>
Hereinafter, an embodiment of the plate glass processing apparatus 10 </ b> C that can take an appropriate countermeasure in the processing process according to the detection of the processing light will be described. FIG. 6 is a schematic diagram showing an embodiment of a plate glass processing apparatus 10C according to the present invention. The processing apparatus 10C has the same configuration as that of the first embodiment described above with reference to FIG. 4 except that the processing tool 11 can be separated from the plate glass 20 at the time of processing. To do.

  In the present embodiment, the processing tool 11 can be separated from the plate glass 20 in accordance with detection of processing light during processing. Specifically, the processing tool 11 is driven so as to be movable along a separation direction 32 (the arrow direction shown in FIG. 6) that is away from the end surface 21 of the glass sheet 20 during processing. When the processing light is detected, the detection result is notified to the worker or output to, for example, the control device of the plate glass processing apparatus 10C. As a result, as shown in FIG. 6, the processing tool 11 is separated from the plate glass 20 along the separation direction 32 by the operation of the worker or the control of the control device. The separation direction 32 is, for example, the cutting direction of the processing tool 11 as shown in FIG. 6, but the present invention is not limited to this. For example, when the processing apparatus 10C processes the plate glass 20 placed so that the main surface 22 is vertical, the separation direction 32 may be the vertical direction.

  FIG. 7 is a flowchart showing a plate glass processing method by the plate glass processing apparatus 10C of the present embodiment. Hereinafter, with reference to FIG.6 and FIG.7, embodiment of the plate glass processing method is described. The plate glass processing method of this embodiment includes a processing step, a detection step, and a separation step, and is executed by steps S602 to S612.

  In step S <b> 602, the processing process starts, and the processing tool 11, for example, the grindstone 111 processes the plate glass 20. Specifically, after the processing tool 11 moves from the start position to the processing position, the end surface 21 of the plate glass 20 is processed while moving relative to the plate glass 20. When the processing process starts, the detection process starts immediately. The detector 12 detects machining light generated when the machining process is executed. Specifically, while the processing tool 11 processes the plate glass 20, the generation of processing light at the contact portion between the plate glass 20 and the processing tool 11 is detected.

  In step S604, it is determined whether or not the detector 12 has detected machining light. When machining light is generated during the machining process and the detector 12 detects machining light, the process proceeds to step S606, and when the detector 12 does not detect machining light, the process proceeds to step S610.

  When processing light is detected in step S604, the processing tool 11 is separated from the glass sheet 20 in step S606. Specifically, the detection result by the detector 12 is output to, for example, a control device of the plate glass processing apparatus 10C. In accordance with the detection result, the control device controls the processing tool 11 so as to be separated from the plate glass 20, and interrupts the processing process.

  Next, in step S606, the processing tool 11 returns to the start position and prepares for the start of the next processing step.

  On the other hand, if the machining light is not detected in step S604, the machining process is continued in step S610.

  Thereafter, in step S612, it is determined whether or not the machining process is completed.

  When the machining process is completed without detecting the machining light, the process proceeds to step S608, and in step S608, the machining tool 11 returns to the start position to prepare for the start of the next machining process.

  On the other hand, if the machining process is not completed in step S612, the process returns to step S604. That is, unless the detection result of detecting the processing light is output from the detector 12, the processing of the processing tool 11 into the glass plate 20 and the detection of the processing light by the detector 12 are continued until the processing step is completed. .

  As described with reference to FIGS. 6 and 7, in the sheet glass processing apparatus 10C and the sheet glass processing method of the present invention, when the detector 12 detects processing light during processing, the operation of the worker or the sheet glass processing apparatus 10C is detected. By the control of the control device, the processing tool 11 is separated from the end surface 21 of the glass sheet 20 along the separation direction 32 and the processing is interrupted. For this reason, unnecessary wear of the processing tool 11 can be prevented. In addition, it is possible to prepare for changing the processing conditions. As a result, it is possible to reduce the possibility of chipping or burning in the plate glass 20 processed after the plate glass 20 being processed, to improve the yield of the processing step, and to further increase the amount of the plate glass 20 that can be conveyed to the subsequent step. Can be increased.

  In each embodiment mentioned above, Preferably detector 12 is installed so that the contact part of sheet glass 20 and processing tool 11 can be followed. Specifically, when a photoelectric sensor is used as the detector 12, for example, the detector 12 is installed so as to move together with the processing tool 11. When an imaging device or a radiation temperature sensor is used as the detector 12, for example, the detector 12 is installed so as to move together with the processing tool 11, or the imaging unit of the imaging device or the temperature measuring unit of the radiation temperature sensor is always used as the plate glass 20. It installs so that it may face the contact part with the processing tool 11. FIG. As a result, a stable detection result can be obtained. However, the present invention is not limited to this. The detector 12 may be installed so as not to follow the contact portion between the plate glass 20 and the processing tool 11.

  Moreover, in the plate glass processing apparatus and plate glass processing method of this invention mentioned above, the grindstone 111 was illustrated as the processing tool 11, and the processing tool 11 performed the grinding process with respect to the end surface 21 of the plate glass 20, but this invention is this. It is not limited. The present invention can also be applied when processing light is generated when processing (for example, polishing or cutting) other than grinding is performed on the plate glass 20 by the processing tool 11 other than the grindstone 111.

  The plate glass processing apparatus and the plate glass processing method of the present invention are suitably used for processing plate glass. For example, by detecting the processing light, it becomes possible to take out defective products of the plate glass in which the processing light is generated in another process. As a result, the yield of the post-process can be improved while maintaining the amount of plate glass that can be conveyed to the post-process.

DESCRIPTION OF SYMBOLS 10, 10A, 10B, 10C Plate glass processing apparatus 11 Processing tool 111 Grinding stone 112 Grinding surface 12 Detector 13 Cover 131 Opening part 14 Nozzle 20 Plate glass 21 End surface 22 Main surface 31 Feeding direction 32 Separating direction 40 Mounting stand

Claims (8)

A processing tool for processing sheet glass;
A plate glass processing apparatus comprising: a detector that detects processing light generated by processing the plate glass with the processing tool. A cover for covering the processing tool;
The plate glass processing apparatus according to claim 1, wherein the detector is installed inside the cover or outside the cover.   The plate glass processing apparatus according to claim 1, wherein the detector is a photoelectric sensor, an optical fiber sensor, a radiation temperature sensor, or an imaging device.   The plate glass processing apparatus according to any one of claims 1 to 3, wherein the processing tool can be separated from the plate glass in accordance with detection of the processing light.   The plate glass processing apparatus according to claim 1, wherein the processing tool and the plate glass are relatively movable during processing into the plate glass. Processing steps for processing sheet glass;
And a detection step of detecting processing light generated by processing the plate glass when the processing step is executed.   The plate glass processing method according to claim 6, further comprising a separation step of separating a processing tool for processing the plate glass from the plate glass in response to detection of the processing light.   In the said process process, the process to the said plate glass is a plate glass processing method of Claim 7 performed while the said processing tool and the said plate glass move relatively.

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