WO2006009222A1 - ガラス板の割れ検出方法及びその装置並びにガラス板の研磨方法及びその装置 - Google Patents
ガラス板の割れ検出方法及びその装置並びにガラス板の研磨方法及びその装置 Download PDFInfo
- Publication number
- WO2006009222A1 WO2006009222A1 PCT/JP2005/013419 JP2005013419W WO2006009222A1 WO 2006009222 A1 WO2006009222 A1 WO 2006009222A1 JP 2005013419 W JP2005013419 W JP 2005013419W WO 2006009222 A1 WO2006009222 A1 WO 2006009222A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sound
- glass plate
- polishing
- predetermined time
- sound level
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
- B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
- B24B7/24—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain for grinding or polishing glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/005—Control means for lapping machines or devices
- B24B37/0053—Control means for lapping machines or devices detecting loss or breakage of a workpiece during lapping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/003—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving acoustic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/10—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/04—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving a rotary work-table
Definitions
- the present invention relates to a glass plate crack detection method and apparatus for detecting a crack generated in a glass plate during processing, and a glass plate polishing method and apparatus therefor.
- a glass substrate used for a liquid crystal display may cause distortion on the image due to minute irregularities and undulations on the surface thereof, and the minute irregularities and undulations are removed by a polishing apparatus.
- a polishing apparatus there is known a polishing apparatus including a moving table on which a glass plate is placed and conveyed, and a plurality of polishing heads arranged continuously above the moving table. . According to this polishing apparatus, the glass plate is gradually polished by the plurality of polishing heads while being conveyed by the moving table.
- the glass plate is broken during the polishing of the glass plate by the polishing apparatus. If the polishing operation is continued in this state, the polishing pad of the polishing head is damaged by the broken glass piece.
- the processing man-hours for the liquid increase and other glass plates are adversely affected during continuous polishing. For this reason, it is necessary to detect the breakage of the glass plate at an early stage and quickly stop the polishing apparatus. When a glass plate breaks, stopping the processing machine quickly is the same for processing machines in other processing steps.
- Patent Document 1 discloses a detection device for detecting breakage of an automotive window glass.
- This glass breakage detection device is a device that extracts a frequency specific to glass breakage from the force of the sound collected by a microphone using a filter, and determines that the glass breakage occurs during detection of this frequency.
- This detector is also equipped with a normal warning mode that gives a short warning when a glass breaking sound is detected, and a special warning mode that gives a long warning when a glass breaking sound is detected.
- the special alert mode is entered after detecting a single glass breaking sound in the normal alert mode as a preliminary stage. Then, after shifting to the special alert mode, if the glass breaking sound is not detected again within a certain time, the normal alert mode is restored.
- Patent Document 1 Japanese Patent Laid-Open No. 4-195298
- the present invention has been made in view of such circumstances, and it is possible to distinguish a cracking sound of a glass plate being processed from a processing sound, a cracking sound of another glass plate, or the like. It is an object of the present invention to provide a crack detection method and apparatus, and a glass plate polishing method and apparatus.
- the present invention collects processing sound generated during processing of a glass plate by the processing means by the sound collecting means, and generates a sound of a predetermined frequency from the collected processed sound.
- a crack detection method wherein a crack in a glass plate is determined by comparing a current sound level of the extracted sound with a current sound level and a steady sound level within a predetermined time in the past. I will provide a.
- the present invention provides a processing means for processing a glass plate, a sound collection means for collecting processing sound of the glass plate by the processing means with a microphone, A processing sound force collected by the sound means by extracting a sound having a predetermined frequency, and comparing a current sound level and a current sound level with a steady sound level within a predetermined time for the sound extracted by the filter. And a determination means for determining a crack in the glass plate.
- a part of the energy released from the glass plate during the processing of the glass plate becomes a sound wave. Propagate. This phenomenon is called “acoustic emission”, and it was confirmed by experiment that the frequency of the sound wave generated when the glass plate was broken was a high-frequency sound of 3 kHz or more.
- the processing sound of the glass plate is a wide range of sound from low frequency to high frequency, which is lower than the sound level of the cracking sound of the glass plate, but also includes the sound of 3kHz or more which is the same as the cracking sound of the glass plate Yes.
- the processed sound is collected by the sound collecting means, the high frequency sound of 3 kHz or higher is extracted by a filter, and the steady sound, cracking sound and similar sound are firstly extracted. get.
- the judging means compares the current sound level and the current power level with a steady sound level within a predetermined past time.
- the crack of the glass plate contained in the processing sound is determined.
- the above sound level is the amplitude of the processed sound
- the steady sound level is the amplitude of the processed sound generated when the glass plate being processed is not cracked. Therefore, the judgment means compares the current sound level with the steady sound level without cracking sound, and when the current sound level becomes a predetermined amount larger than the steady sound level, the glass plate is cracked. judge.
- the polishing control means controls the polishing means to control the glass. Stop polishing the plate.
- sound is collected by a processing sound generated during processing of a glass plate by the processing means, and the processing sound collected is predetermined from the collected processing sound.
- a first step of extracting a sound of a predetermined frequency by a filter, a second step of obtaining a maximum sound level within a predetermined time T1 every predetermined time T1 for the extracted sound, and a current step In the past predetermined time T2 (T2> T1), the third step of acquiring the lowest sound level among the sound levels acquired in the second step as a steady sound level, and the current sound level
- the fourth step of adding 1 count, and the third step and the fourth step are repeated every predetermined time T1, and the predetermined time is reached.
- a crack detection method characterized by comprising:
- a glass plate is processed to achieve the above object.
- Sound collecting means for collecting the processing sound of the glass plate by a processing means, a processing sound power collected by the sound collecting means, a filter for extracting sound of a predetermined frequency, and the filter for extracting the sound.
- the sound level that is the maximum within the predetermined time T1 is acquired every predetermined time T1
- the current power is past the predetermined time T2 (T2> T1).
- the minimum sound level of the sound levels acquired in the first acquisition step is acquired as a steady sound level, and the current sound level and the second acquisition step are acquired in the addition step.
- a crack detecting apparatus characterized by having a a determining means for determining to have occurred.
- the processed sound is collected by the sound collecting means, and the above-described high frequency sound of 3 kHz or higher is extracted by the filter, and the steady sound, the cracking sound, and similar sounds are extracted.
- the determination means obtains a sound level that is maximum within a predetermined time T1 for each sound extracted by the filter every predetermined time T1.
- T2 the past predetermined time
- the polishing control means controls the polishing means to stop the polishing of the glass plate.
- the method and apparatus for detecting a crack in a glass sheet according to the present invention and a polishing apparatus.
- the polishing method and its apparatus it is possible to detect early and reliably that a crack has occurred in the glass plate during processing.
- calculations for detecting cracks in glass sheets can be calculated and judged using simple arithmetic expressions without using FFT (Fast Fourier 'cosine' sine transform), so that judgment processing can be performed at low cost and at high speed. Can do.
- FFT Fast Fourier 'cosine' sine transform
- FIG. 1 is a configuration diagram of a glass plate polishing apparatus to which a glass plate breakage detection apparatus according to an embodiment of the present invention is applied.
- FIG. 2 is a sound waveform diagram of polishing sound collected by a microphone.
- FIG. 3 is a waveform diagram showing the ratio between the current sound level and the steady sound level.
- FIG. 4 is a block diagram showing a configuration of a microphone, a filter, and a determination unit.
- FIG. 5 is a flowchart of a crack detection method using a crack detection apparatus.
- FIG. 1 shows a main part of a glass plate polishing apparatus 12 to which the glass plate breakage detection apparatus 10 of this example is applied.
- This polishing apparatus 12 is a polishing apparatus that polishes one side of a glass plate G (for example, one side of 700 mn! To 25 OOmm, a thickness of 0.5 mm to l.3 mm) to the flatness required for a glass substrate for a liquid crystal display, Table 14, which transports glass plate G to be polished A polishing head 16 or the like installed above the table 14 is configured.
- the glass plate G before polishing is placed on the table 14 on the upstream side of the table 14 and then positioned on the lower side of the polishing head 16 by the movement of the table 14. (The top surface in Figure 1) is polished.
- a polishing slurry such as an aqueous solution of cerium oxide is supplied to the upper surface of the glass plate G from a slurry supply unit (not shown) installed in the vicinity of the polishing head 16.
- a slurry supply unit (not shown) installed in the vicinity of the polishing head 16.
- the polishing pad for example, a foamed polyurethane type or a suede type is used.
- the polishing apparatus 12 is exemplified as the processing means of the glass plate, but the glass plate cutting device, chamfering device, drilling device, heat forming device, or air cooling strengthening is not limited to this. It may be a device.
- a spindle 20 is fixed to the upper part of the polishing head 16, and a rotary Z lifting / lowering device (polishing means) 22 is connected to the spindle 20.
- the rotation and lifting operation of the rotating Z lifting / lowering device 22 is controlled by a control unit (polishing control means) 24 that controls the entire polishing device 12 in synchronization with the conveyance timing of the glass sheet G by the table 14. That is, the rotary Z lifting device 22 controls a lifting mechanism such as a hydraulic cylinder device to place the polishing head 16 in a retracted position above the polishing position in advance, and the glass plate G is positioned below the polishing head 16. At the timing when it is conveyed to the position, it is moved downward from the retracted position to the polishing position.
- the polishing pad 20 is pressed against the upper surface of the glass plate G with a predetermined pressure, and thereafter, the rotary Z lifting device 22 controls the motor to move the polishing head 16 to a predetermined rotation speed (for example, 50 to 50). Rotate at 250rpm).
- a continuous polishing type polishing apparatus in which a plurality of polishing heads 16 are arranged in parallel above the table 14 may be applied.
- the glass plate G is While being transported intermittently, it is gradually polished by a plurality of polishing heads 16, 16... And finally polished to the required flatness.
- the polishing pad 16 may be circular or rectangular in shape, and a circular or rectangular polishing pad 16 may be mixed.
- the glass plate crack detection device 10 is composed of a microphone (sound collecting means) 30, a computer main body 32, a keyboard 34, and a display 36, and determines whether the glass plate G breaks during polishing.
- CD-ROM and other recording media with built-in algorithms It is composed of body 38.
- the microphone 30 is installed in the vicinity of the polishing head 16, and collects the polishing sound in which the glass plate G force during polishing is also generated. In addition to the above-described polishing sound, the microphone 30 collects sound generated from the rotary Z lifting device 22 and the moving device of the table 14 constituting the polishing device 12, and also near the polishing device 12. It also collects cracking sounds that occur when processing the ears after cutting the glass and culleting the defective glass plate. That is, the microphone 30 collects a sound similar to the cracking sound of the glass plate in addition to the cracking sound during polishing, and low-frequency sound power and high-frequency sound generated from various devices. Sound information collected by the microphone 30 is converted into an electrical signal and transmitted to the personal computer 32.
- a display 36 is connected to the personal computer main body 32, and information obtained by processing the sound information collected by the microphone mouthphone 30 by the personal computer main body 32 is displayed on the display 36.
- the displayed information includes, for example, the sound waveform shown in FIG. 2 and the sound waveform shown in FIG. Fig. 2 shows a sound waveform including cracking sound.
- the sound waveform indicated by the symbol A represents the sound collected by the microphone 30 and the filter 40 0 built in the personal computer body 32 (Fig. 4 This is the input sound waveform of the sound extracted by (see).
- the filter 40 is a filter that extracts a high frequency sound of 3 kHz or more, and preferably a filter that extracts a high frequency sound of 3 kHz to 12 kHz, more preferably 3.5 kHz to 6 kHz.
- the sound waveform indicated by symbol B has a maximum sound level (amplitude of polishing sound) within a predetermined time T1 (for example, 10 msec (preferably 0.1 to 1000 msec, particularly preferably 1 to: LOO msec)). It is a sound waveform created by acquiring at every predetermined time T1. Furthermore, the sound waveform indicated by symbol C has a minimum sound level (polishing) within the predetermined sound time T2 (for example, 300 msec (preferably lmsec to 10 sec, particularly preferably 100 to 1000 msec)). This is a sound waveform created to obtain the sound amplitude as a steady sound level.
- the steady sound level mentioned here means the magnitude of the amplitude of the polishing sound that sometimes occurs when the glass plate G being polished is cracked.
- the sampling period of the sound information is 40 kHz (25 sec), preferably 20 to 60 kHz, and particularly preferably 30 to 50 kHz.
- FIG. 3 shows a sound waveform processed for determination, and this sound waveform is obtained at predetermined time intervals T1.
- the ratio (threshold) is set to 2.5, and the sound level exceeds that ratio. Is marked with a country mark.
- the threshold is preferably 1 to 10, particularly preferably 1.5 to 5.
- the personal computer main body 32 incorporates a determination unit 42 (see FIG. 4) that determines the breakage of the glass plate G based on sound information collected by the microphone 30.
- the determination unit 42 will be described later.
- a media interface (not shown) is provided.
- the personal computer main body 32 records a program for operating the CPU that performs overall control of the personal computer main body 32, and the memory serving as a work area when the CPU executes processing, and the processing of the personal computer main body 32
- a hard disk is provided to record various information such as various constants, connection information such as dial-up telephone numbers, addresses, and site addresses when connecting to communication devices on the network, calculation formulas, and calculation tables.
- the determination unit 42 is programmed in a predetermined language so as to perform the following processing.
- the determination unit 42 first collects sound by the microphone 30 and extracts high-frequency sound of 3 kHz or higher by the filter 40 (step (S) 100, first step). As a result, the low frequency sound generated from various devices such as the rotary Z lifting device 22 and the table moving device is excluded from the sound to be judged.
- the maximum sound level within a predetermined time Tl 10msec is acquired every predetermined time T1 (step) 110, 2 steps).
- T2 300 msec
- 1 count is added when the ratio between the current sound level acquired every T1 and the normal sound level exceeds a predetermined value (2.5) (S130, 4th). Process, addition process).
- the third step and the fourth step are repeated every predetermined time T1 until the count reaches 10 counts (S140), and the predetermined time T3 (for example, 5 sec (preferably 1 to 60 sec, particularly preferably l
- the control shown in FIG. A signal indicating cracking is output to part 24.
- the control unit 24 controls the rotary Z lifting device 22 to stop the rotation of the polishing head 16 and raise the polishing head 16 from the polishing position to the retracted position to stop polishing (S150 ).
- this determination method it is possible to eliminate the sound power to be determined, such as the ear processing after cutting of the glass plate, the cullet processing sound of the defective glass plate, and the like, which are similar to the sound of glass breaking sound and are generated irregularly. It is possible to detect only the cracking sound of the glass plate G that is periodically generated when cracking occurs during polishing as the sound to be judged. Therefore, according to the determination method of the embodiment, only cracking sound during polishing is obtained from sounds in a wide frequency band including low-frequency sound and high-frequency sound such as sound for polishing a glass plate and cracking sound of another glass plate. Can be detected.
- the crack detection device 10 for the glass sheet G of the present example it is possible to detect early and reliably that a crack has occurred in the glass sheet G during polishing.
- the calculation for detecting cracks in the glass sheet G can be calculated and judged by a simple arithmetic expression without using FFT (Fast Fourier 'cosine' sine transform), so it can be performed at low cost and at high speed. Judgment processing can be performed.
- FFT Fast Fourier 'cosine' sine transform
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020067026726A KR100856361B1 (ko) | 2004-07-23 | 2005-07-21 | 유리판의 균열 검출 방법 및 그 장치 그리고 유리판의 연마방법 및 그 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004216048A JP4569749B2 (ja) | 2004-07-23 | 2004-07-23 | ガラス板の割れ検出方法及びその装置並びにガラス板の研磨方法及びその装置 |
JP2004-216048 | 2004-07-23 |
Publications (1)
Publication Number | Publication Date |
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WO2006009222A1 true WO2006009222A1 (ja) | 2006-01-26 |
Family
ID=35785330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/013419 WO2006009222A1 (ja) | 2004-07-23 | 2005-07-21 | ガラス板の割れ検出方法及びその装置並びにガラス板の研磨方法及びその装置 |
Country Status (4)
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JP (1) | JP4569749B2 (ja) |
KR (1) | KR100856361B1 (ja) |
TW (1) | TW200613089A (ja) |
WO (1) | WO2006009222A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107378750A (zh) * | 2016-04-12 | 2017-11-24 | 旭硝子株式会社 | 玻璃破裂检测方法及检测装置、玻璃板的研磨方法及研磨装置、以及玻璃板的制造方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5533666B2 (ja) | 2008-12-12 | 2014-06-25 | 旭硝子株式会社 | 研磨装置、及び研磨方法、並びにガラス板の製造方法 |
KR101579018B1 (ko) * | 2011-11-02 | 2015-12-18 | 신닛테츠스미킨 카부시키카이샤 | 강관의 생산 관리 방법 |
DE102019215077A1 (de) * | 2019-09-30 | 2021-04-01 | Hegla Gmbh & Co. Kg | Schneidverfahren und Schneideinrichtung zum Ritzen von Bauteilen aus Glas oder Keramik sowie Verfahren zum Aufteilen von Bauteilen aus Glas oder Keramik |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5676044A (en) * | 1979-11-27 | 1981-06-23 | Toyota Motor Corp | Inspecting method of crack of material to be machined |
JPS6069550A (ja) * | 1983-09-26 | 1985-04-20 | Hiroshi Eda | 研削割れ検出方法及び装置 |
JPS6079261A (ja) * | 1983-10-06 | 1985-05-07 | Nachi Fujikoshi Corp | 工具異常検出装置 |
JPS61132861A (ja) * | 1984-11-30 | 1986-06-20 | Omron Tateisi Electronics Co | 工具折損検出装置 |
JPS62197891A (ja) * | 1986-02-25 | 1987-09-01 | 松下電工株式会社 | ガラス破壊検知器 |
JPH04195298A (ja) * | 1990-11-22 | 1992-07-15 | Fujitsu Ten Ltd | ガラス割れ警報装置 |
JP2000024919A (ja) * | 1998-07-14 | 2000-01-25 | Nippei Toyama Corp | ウエハの加工方法及び研削盤 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS63297237A (ja) * | 1987-05-29 | 1988-12-05 | Matsushita Electric Ind Co Ltd | 分割装置 |
JP3573216B2 (ja) * | 1994-03-22 | 2004-10-06 | 旭硝子株式会社 | 板ガラスの切断方法及び装置 |
JP4078252B2 (ja) * | 2003-05-30 | 2008-04-23 | キヤノン株式会社 | 円筒状電子写真感光体用基体の製造方法、円筒状電子写真用基体、電子写真感光体及び円筒状電子写真用基体の製造装置 |
-
2004
- 2004-07-23 JP JP2004216048A patent/JP4569749B2/ja active Active
-
2005
- 2005-07-21 WO PCT/JP2005/013419 patent/WO2006009222A1/ja active Application Filing
- 2005-07-21 KR KR1020067026726A patent/KR100856361B1/ko active IP Right Grant
- 2005-07-22 TW TW094125061A patent/TW200613089A/zh not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5676044A (en) * | 1979-11-27 | 1981-06-23 | Toyota Motor Corp | Inspecting method of crack of material to be machined |
JPS6069550A (ja) * | 1983-09-26 | 1985-04-20 | Hiroshi Eda | 研削割れ検出方法及び装置 |
JPS6079261A (ja) * | 1983-10-06 | 1985-05-07 | Nachi Fujikoshi Corp | 工具異常検出装置 |
JPS61132861A (ja) * | 1984-11-30 | 1986-06-20 | Omron Tateisi Electronics Co | 工具折損検出装置 |
JPS62197891A (ja) * | 1986-02-25 | 1987-09-01 | 松下電工株式会社 | ガラス破壊検知器 |
JPH04195298A (ja) * | 1990-11-22 | 1992-07-15 | Fujitsu Ten Ltd | ガラス割れ警報装置 |
JP2000024919A (ja) * | 1998-07-14 | 2000-01-25 | Nippei Toyama Corp | ウエハの加工方法及び研削盤 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107378750A (zh) * | 2016-04-12 | 2017-11-24 | 旭硝子株式会社 | 玻璃破裂检测方法及检测装置、玻璃板的研磨方法及研磨装置、以及玻璃板的制造方法 |
Also Published As
Publication number | Publication date |
---|---|
KR100856361B1 (ko) | 2008-09-04 |
TW200613089A (en) | 2006-05-01 |
KR20070032952A (ko) | 2007-03-23 |
TWI350227B (ja) | 2011-10-11 |
JP4569749B2 (ja) | 2010-10-27 |
JP2006035343A (ja) | 2006-02-09 |
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