GB2261433A - Apparatus for cutting corners of plate-like materials - Google Patents
Apparatus for cutting corners of plate-like materials Download PDFInfo
- Publication number
- GB2261433A GB2261433A GB9213995A GB9213995A GB2261433A GB 2261433 A GB2261433 A GB 2261433A GB 9213995 A GB9213995 A GB 9213995A GB 9213995 A GB9213995 A GB 9213995A GB 2261433 A GB2261433 A GB 2261433A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- cutting
- supporting
- corner
- timer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
-
- 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
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
-
- 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
- B24B49/02—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 according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
-
- 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
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
- B24B9/10—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of plate glass
- B24B9/102—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of plate glass for travelling sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
- B26D5/30—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier
- B26D5/32—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier with the record carrier formed by the work itself
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
A conveyor for quadrilateral glass plates 2 supports their top and bottom surfaces. Glass-plate detecting limit switches 4 are provided at corresponding positions at both sides of the conveyor. Corner cutting horizontal rotary grinders 5 mounted on grinder tables 6 are provided downstream of the limit switches 4. Timers 7, 7' are operated in response to a glass-plate arrival and departure detection signals from the switches 4. In association with the timers, the grinder tables 6 are moved toward or away from each other. A digital control unit controls the seat duration of the timers 7, 7' and controls the speed of the movement of the grinder tables 6 by step motors 8. <IMAGE>
Description
APPARATUS FOR CUTTING CORNERS OF PLATE-LIKE MATERIALS
The present invention relates to corner cutting apparatus for forming cut surfaces of the same or different dimensions on corners of platematerials, such as glass plates, which may be equidistantly placed and continuously moved.
Conventionally, corners of rectangular glass plates are manually cut.
Therefore, there are several problems, such as: the dimensional precision is inconsistent; a glass plate may be scratched or cracked during the process; and processing on a large scale is difficult.
To solve such problems, the present inventor previously developed an apparatus which requires only one passage of the material through the apparatus in order to form cut surfaces on all the corners of a plate-like material (disclosed in Japanese Utility Model Publication No. 63-17646).
However, being analog controlled, the above apparatus was not satisfactory for improving processing precision in corner cutting of several plate-like materials which require highly precise processing, such as industrial-use glass plates (having a thickness of 3 to 5 mm) and rectangular device plates (special thin glass plates having thicknesses of, e.g., 0.55 mm, 0.7 mm, 1.1 mm) which are processed in a pre-processing step by an apparatus for manufacturing a flat display such as a liquid crystal panel. In addition, it was difficult to form cut surfaces in shapes varying from one corner to another.
Accordingly, it would be desirable to be able to provide corner cutting apparatus which improves precision in processing corners of plate-like materials, for example, industrial-use glass plates and rectangular device plates for a flat display such as a liquid crystal panel.
It would also be desirable to be able to provide a corner cutting apparatus which is capable of adjusting the form of a cut surface independently from the form of another cut surface as well as improving processing precision.
The present invention provides corner cutting apparatus for cutting corners of a plate-like material, comprising: conveying means provided on a frame for conveying the plate-like material by clamping it on top and bottom surfaces thereof; switch means provided at corresponding positions at both sides of the conveying means for detecting the plate-like material; cutting means each for cutting a corner of the plate-like material, which are provided at corresponding positions at both sides of the converying means and downstream from the switch means with respect to the direction in which the conveying means conveys the plate-like material; supporting means for supporting each cutting means so that the cutting means are movable toward and away from each other; step motors for moving the supporting means; a first timer operated in response to a signal indicating detection of the plate-like material, the signal being generated by the switch means when the plate-like material is conveyed into an operable region of the switch means; a second timer operated in response to a signal indicating secession of the plate-like material from the operable region of said switch means, the signal being generated by the switch means when the plate-like material is conveyed out of the operable region of said switch means; and a digital control unit responsive to operation of the first and second timers to control the step motors that move the cutting means toward and away from each other by transmission of the supporting means.The supporting means are moved away from each other when the first timer has run through a predetermined duration set therein, and as the cutting means are moved together with the supporting means, the cutting means cut the corners on a front end of the plate-like material. Further, the supporting means are moved toward each other when the second timer has run through a predetermined duration set therein, and as the cutting means are moved together with the supporting means, the cutting means cut the corners on a rear end of the plate-like material.
A corner cutting apparatus according to a preferred embodiment of the present invention not only achieves improved processing precision of cut surfaces on corners of a plate-like material, such as rectangular glass plate, but also can form cut surfaces of the same or different dimensions of corners of such a plate-like material1 since the duration set in the first and second timers and the speeds of the cutting means when moving toward and away from each other can be adjusted by means of the digital control unit.
Further optional features and advantages of the present invention will become apparent from the following description of the preferred embodiment with reference to the attached drawings, wherein:
Fig. 1 is a block diagram of corner cutting apparatus for glass plates according to the present invention;
Fig. 2 is a plan view of a glass-plate processing machine employing the corner cutting apparatus shown in Fig. 1;
Fig. 3 is a side view of the glass-plate processing machine shown in Fig.
2;
Fig. 4 is a front view of the glass-plate processing machine shown in
Fig. 2, taken along the line A-A of Fig. 2;
Figs. 5(a) to 5(c) illustrate the process of cutting corners, showing cut surfaces;
Fig. 6 is a plan view of a glass plate;
Figs. 7(a) and 7(b) illustrate cut surfaces indicated by imaginary lines; and
Figs. 8(a) to 8(e) are plan views of glass plates whose corners are cut.
The preferred embodiment of the present invention will be described hereinafter with reference to the attached drawings. In the drawings, the same numerals are used to denote the same or comparable portions. Referring to Figs. 1 to 4, a conveyer 3 for conveying a rectangular glass plate 2 by clamping it on the top and bottom surfaces thereof is formed of top and bottom surface clamping endless belts 3', 3' which are provided on a stationary frame 1 and a movable frame 1', respectively. Limit switches 4, 4 for detecting glass plates are provided at opposite sides of the conveyer, at positions corresponding to each other. Horizontal rotary grinders 5, 5 for cutting corners of glass plates are provided at opposite sides of the conveyer 3.In detail, they are positioned a predetermined distance downstream, in the conveyance direction indicated by the arrow a, from the limit switches 4, 4, respectively. The horizontal rotary grinders 5, 5 are mounted on grinder tables 6, 6, respectively, which are movable toward or away from each other.
A digital control unit (CPU) 9 is connected with an on-delay timer 7 and an off-delay timer 7' which are operated by the limit switches 4, 4. The operating duration of the timers 7, 7' can be set as desired. Driving step motors 8, 8 are provided which are operated in either of the rotational directions in association with the timer 7 or 7' so as to move the grinder tables 6, 6 toward or away from each other.
In detail, when the plate glass 2 is brought into an operational region of the limit switches 4, 4 so that the limit switches 4, 4 are turned on (a signal indicating detection of the glass-plate), the timer 7 starts operating.
After a lapse of a set duration of the timer 7, the step motors 8, 8 are operated to move the grinder tables 6, 6 away from each other. When the limit switches 4, 4 are turned off (a signal indicating that the glass-plate has left the operable region), the timer 7' starts operating. After a lapse of a set duration of the timer 7', the step motors 8, 8 are operated to move the grinder tables 6, 6 toward each other.
As shown in Fig. 4, a step motor 8 is mounted on a supporting table 11, and an output shaft 12 of the step motor 8 is connected to a ball bolt 13, which is engaged with a ball nut 14. A grinder table 6 is mounted on this ball nut 14. The other grinder table 6 is connected to the other step motor 8 in the same manner. The step motors 8, 8 rotate digitally in units of a predetermined angle according to pulse signals. Controlled by the digital control unit 9, the step motors 8, 8 move the grinder tables 6, 6 exactly a predetermined distance in the direction indicated by the arrows b and c (in
Fig. 5), i.e. away from and toward each other.
The speeds of the grinder tables when moving toward and away from each other can be adjusted by changing set values of a digital switch of a pulse generator 10. The drawings further show: a driver 15 for the step motors 8, 8; home-position detecting limit'switches 16, 16 for detecting the grinder tables 6, 6 so that the grinder tables 6, 6 will stop at the home position; a roller 17 for supporting the upper belt 3'; a motor 18 for driving the rotary grinder 5; and a data pack 19.
In the above-described corner cutting apparatus of the present invention, rectangular glass plates 2 are equidistantly set on the conveyer 3 with their top and bottom surfaces clamped thereby and are conveyed at a constant speed in the direction indicated by the arrow a. When the glass-detecting limit switches 4, 4 detect the front end of a glass plate 2 (i.e. the limit switches are turned on), a detection signal is sent to the timer 7 to turn it on. The moment a set duration of the timer 7 is up, the step motors 8, 8 are turned on (forward rotation) to draw back the horizontal rotary grinders 5, 5 from the front position. As the rotary grinders 5, 5 are moved backward, the grinders 5, 5 cut both the corners of the front edge of the glass plate 2.
Thus, cut surfaces 2', 2' are instantly formed on the front corners of the glass plate 2.
When the limit switches 4, 4 detect that the rear end of the glass plate 2 has left the operable region (i.e. the limit switches are turned off) as the glass plate 2 is conveyed in the direction indicated by the arrow a, a signal indicating the leaving of the glass plate 2 is sent to the timer 7' to turn it on. Upon the moment the set duration of timer 7' is up, the step motors 8, 8 are turned on (reverse rotation) to move the rotary grinders 5, 5 forward from the rear position. Moving forward, the rotary grinders 5, 5 cut both the corners of the rear edge of the glass plate 2. Thus, cut surfaces 2", 2" are instantly formed on the rear corners of the glass plate 2.
The angles of the cut surfaces2', 2', 2", 2" will vary if the speeds of the backward and forward movements of the rotary grinders 5, 5 (together with the grinder tables 6, 6) are changed by adjusting set values of the digital switch of the pulse generator 10. Further, the lengths of the cut surfaces can be changed by changing set durations of the timer 7, 7'. Thus, forms of the cut surfaces 2', 2', 2", 2" can be changed as desired.
While the present invention has been described with respect to corner cutting of rectangular glass plates, the invention is not limited to processing of such glass plates. An apparatus according to the invention can be used to process other plate-like materials such as resin plates. A platelike material to be processed does not need to be rectangular but may be any other shape as long as it has a corner. Thus, the invention is intended to cover various modifications and equivalent arrangements included within the
scope of the appended claims.
Claims (7)
1. Corner cutting apparatus for cutting corners of a plate-like material, comprising:
conveying means, provided on a frame, for conveying said plate-like material by clamping it on top and bottom surfaces thereof;
switch means, provided at corresponding positions at both sides of said conveying means, for detecting said plate-like material;
cutting means, each for cutting a corner of said plate-like material, which are provided at corresponding positions at both sides of said conveying means and downstream from said switch means with respect to the direction in which said conveying means conveys said plate-like material;
supporting means for supporting each of said cutting means so that said cutting means are movable toward and away from each other;
step motors for moving said supporting means;;
a first timer operated in response to a signal indicating arrival of said plate-like material, said signal being generated by said switch means when said plate-like material is conveyed into an operable region of said switch means;
a second timer operated in response to a signal indicating departure of said plate-like material from the operable region of said switch means, said signal being generated by said switch means when said plate-like material is conveyed out of the operable region of said switch means; and
a digital control unit responsive to operation of said first and second timers to control said step motors that move said cutting means toward and away from each other by transmission of said supporting means,
whereby said supporting means are moved away from each other when said first timer has run through a predetermined duration set therein, and as said cutting means are moved together with said supporting means, said cutting means cut at least one corner on a front end of said plate-like material, and
the supporting means are moved toward each other when the second timer has run through a predetermined duration set therein, and as the cutting means are moved together with the supporting means, the cutting means cut at least one corner on a rear end of the plate-like materal.
2. Apparatus as claimed in claim 1, in which the duration set in the first and second timers and the speeds of the cutting means when moving toward and away from each other are selectable by means of
the digital control unit.
3. Apparatus as claimed in claim 1 or 2, arranged to
convey and cut rectangular glass plate.
4. Apparatus as claimed in claim 1 or 2, arranged to convey and cut a rectangular device plate for a liquid crystal panel,
in flat display manufacturing apparatus.
5 Apparatus as claimed in any preceding claim, in which the cutting means are horizontal rotary grinders.
6. Apparatus as claimed in any preceding claim, in which the switch means are limit switches.
7. Corner cutting apparatus substantially as described with reference to, and as shown in, the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3168356A JPH0714585B2 (en) | 1991-07-09 | 1991-07-09 | Flat glass corner cutting device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9213995D0 GB9213995D0 (en) | 1992-08-12 |
| GB2261433A true GB2261433A (en) | 1993-05-19 |
| GB2261433B GB2261433B (en) | 1995-02-15 |
Family
ID=15866561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9213995A Expired - Fee Related GB2261433B (en) | 1991-07-09 | 1992-07-01 | Apparatus for cutting corners of plate-like materials |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH0714585B2 (en) |
| KR (1) | KR100237507B1 (en) |
| BE (1) | BE1007127A3 (en) |
| GB (1) | GB2261433B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1063054A2 (en) * | 1999-06-21 | 2000-12-27 | Z. BAVELLONI S.p.A. | Bilateral edge-type machine for edge-machining glass or stone-like plate materials and the like |
| EP1063053A2 (en) * | 1999-06-21 | 2000-12-27 | Z. BAVELLONI S.p.A. | Bilateral automatic machine for edge-machining plates of glass, stone-like materials and the like |
| EP1174214A1 (en) * | 2000-07-17 | 2002-01-23 | Z. BAVELLONI S.p.A. | Apparatus for working the edges of glass plates |
| EP1510289A2 (en) * | 2002-08-30 | 2005-03-02 | RoboTool Holding ApS | method for stack grinding |
| ITMI20112076A1 (en) * | 2011-11-15 | 2013-05-16 | Comandulli Costruzioni Meccaniche S R L | ROLLS COAST MACHINE |
| EP3012066A1 (en) * | 2014-10-20 | 2016-04-27 | Biesse S.p.A. | Bilateral machine for machining edges of plates with integrated corner radiusing devices |
| CN109571610A (en) * | 2018-12-20 | 2019-04-05 | 中绿新材料（江苏）有限公司 | A kind of accurate cutting machine of rubber |
| EP3581331A1 (en) | 2018-06-13 | 2019-12-18 | Phup Remszklo s.c. | Set of discs for grinding the edges of glass plates |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012131030A (en) * | 2012-04-09 | 2012-07-12 | Bando Kiko Co Ltd | Method and device for cutting corners of glass plate |
| JP6050086B2 (en) * | 2012-10-30 | 2016-12-21 | ＡｖａｎＳｔｒａｔｅ株式会社 | Manufacturing method of glass substrate |
| CN117697573B (en) * | 2024-02-05 | 2024-04-30 | 四川炬科光学科技有限公司 | Processing equipment for optical lens |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2273627A2 (en) * | 1974-06-06 | 1976-01-02 | Intraco | Device for grinding corners of glass sheets - has grinding disc on lever and spaced from sheet edges by rollers |
| DE8703250U1 (en) * | 1987-03-04 | 1987-10-08 | Bielefelder Union Bruno Koch GmbH & Co. KG Maschinenfabrik, 4800 Bielefeld | Edge sanding machine |
| IL84383A (en) * | 1987-11-06 | 1994-08-26 | Kyro Oy | Apparatus for cutting glass blanks |
-
1991
- 1991-07-09 JP JP3168356A patent/JPH0714585B2/en not_active Expired - Fee Related
-
1992
- 1992-07-01 GB GB9213995A patent/GB2261433B/en not_active Expired - Fee Related
- 1992-07-08 BE BE9200633A patent/BE1007127A3/en not_active IP Right Cessation
- 1992-07-08 KR KR1019920012111A patent/KR100237507B1/en not_active IP Right Cessation
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6416382B1 (en) | 1999-06-21 | 2002-07-09 | Z. Bavelloni S.P.A. | Bilateral automatic machine for edge-machining plates of glass, stone-like materials and the like |
| EP1063054A2 (en) * | 1999-06-21 | 2000-12-27 | Z. BAVELLONI S.p.A. | Bilateral edge-type machine for edge-machining glass or stone-like plate materials and the like |
| EP1063053A2 (en) * | 1999-06-21 | 2000-12-27 | Z. BAVELLONI S.p.A. | Bilateral automatic machine for edge-machining plates of glass, stone-like materials and the like |
| EP1063053A3 (en) * | 1999-06-21 | 2002-01-30 | Z. BAVELLONI S.p.A. | Bilateral automatic machine for edge-machining plates of glass, stone-like materials and the like |
| EP1063054A3 (en) * | 1999-06-21 | 2002-01-30 | Z. BAVELLONI S.p.A. | Bilateral edge-type machine for edge-machining glass or stone-like plate materials and the like |
| US6398629B1 (en) | 1999-06-21 | 2002-06-04 | Z. Bavelloni S.P.A. | Bilateral edge-type machine for edge-machining glass or stone-like plate materials and the like |
| EP1174214A1 (en) * | 2000-07-17 | 2002-01-23 | Z. BAVELLONI S.p.A. | Apparatus for working the edges of glass plates |
| EP1510289A2 (en) * | 2002-08-30 | 2005-03-02 | RoboTool Holding ApS | method for stack grinding |
| EP1510289A3 (en) * | 2002-08-30 | 2005-11-09 | RoboTool Holding ApS | method for stack grinding |
| WO2013072845A1 (en) * | 2011-11-15 | 2013-05-23 | Comandulli Costruzioni Meccaniche S.R.L. | A machine for working slab edges |
| ITMI20112076A1 (en) * | 2011-11-15 | 2013-05-16 | Comandulli Costruzioni Meccaniche S R L | ROLLS COAST MACHINE |
| EP3012066A1 (en) * | 2014-10-20 | 2016-04-27 | Biesse S.p.A. | Bilateral machine for machining edges of plates with integrated corner radiusing devices |
| EP3581331A1 (en) | 2018-06-13 | 2019-12-18 | Phup Remszklo s.c. | Set of discs for grinding the edges of glass plates |
| CN109571610A (en) * | 2018-12-20 | 2019-04-05 | 中绿新材料（江苏）有限公司 | A kind of accurate cutting machine of rubber |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100237507B1 (en) | 2000-04-01 |
| JPH0714585B2 (en) | 1995-02-22 |
| GB2261433B (en) | 1995-02-15 |
| BE1007127A3 (en) | 1995-04-04 |
| JPH0516063A (en) | 1993-01-26 |
| KR930002038A (en) | 1993-02-22 |
| GB9213995D0 (en) | 1992-08-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20030701 |