CN102441828A - End edge grinding method for glass substrates - Google Patents
End edge grinding method for glass substrates Download PDFInfo
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- CN102441828A CN102441828A CN2010105027676A CN201010502767A CN102441828A CN 102441828 A CN102441828 A CN 102441828A CN 2010105027676 A CN2010105027676 A CN 2010105027676A CN 201010502767 A CN201010502767 A CN 201010502767A CN 102441828 A CN102441828 A CN 102441828A
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Abstract
The invention provides an end edge grinding method for glass substrates, which is capable of performing chamfering processing with high productivity and improving surface roughness of a processed surface. In the end edge grinding method for a glass substrate (1) by the aid of a chamfering wheel (2), abrasive particles are arranged among fibers and polyurethane resin is filled among the fibers to form the chamfering wheel (2), the wheel is approximately disk-shaped, the section of the wheel is concave, so that the wheel in rotation is oblique relative to a plane of the glass substrate at a set angle, and the end surface of the wheel is abutted to an end edge of the glass substrate.
Description
Technical field
The present invention relates to the end edge portion Ginding process of glass plate, particularly be fit to LCD with the end edge portion Ginding process of flat-panel screens such as glass plate with glass plate.
Background technology
At present, general display with the chamfering method of glass plate (glass substrate) normally with chamfering method or based on the wheel chamfering method of emery wheel (chamfering wheel).
Said band chamfering method is that banded for no reason pouncing paper (emery paper) is laid between two axles, and by the processing method that is pressed on the object that belt transmits, though there is the easy advantage of device, also there is the shortcoming that is difficult for automation in the end edge portion of glass plate.
The wheel chamfering method rotates for making roughly discoid emery wheel (abrasive wheel), by the processing method of the end edge portion that is pressed in glass plate, though installation cost is higher, exists productivity height and automation to be easy to advantage the end face of this emery wheel or disc face.Below, this is taken turns chamfering method describe.
Will be roughly in the processing method of end face by the end edge portion that is pressed in glass plate 1 (with reference to Fig. 9 (a)) of discoid emery wheel; Have end face with emery wheel to form to twine spool-like and only remove glass plate 1 end edge portion rib portion, or will cylindric upright emery wheel tilt and the so-called C face processing (with reference to Fig. 9 (b)) of rib portion of only removing the end edge portion of glass plate 1, perhaps form the end face of emery wheel circular-arc and with the shape of the end edge portion profiling emery wheel of glass plate 1 remove, so-called R face processing or be shaped and process (with reference to Fig. 9 (c)).
Fig. 9 is the concept map of work flow of the end edge portion of the existing glass plate of explanation, is the profile of end edge portion of glass plate that chamfer machining is proceeded to the situation of secondary operations.That is, (a) preceding state, (b) of expression processing representes the state of the so-called C face processing of enforcement, the state that the so-called R face of (c) expression enforcement is processed the processing that perhaps is shaped, the state that (d) representes the enforcement mirror finish.In addition, generally speaking, the C faces of implementing (b) are processed more, the R face of (c) is any in processing, in addition, and the mirror finish of omitting (d) more.
Figure 10 is the concept map (plane see) of explanation with the processing method of the existing so-called R face processing or the processing that is shaped, and Figure 11 is the (a) and (b) of Figure 10, the BB line profile of (c) each state.In Figure 10, Figure 11, label 1 expression glass plate, 3 expression diamond wheels.In addition, in Figure 10, Figure 11, carry out technology according to the order of (a) and (b), (c).Arrow among Figure 10 (b) is represented the direction that relatively moves of glass plate 1 and diamond wheel 3.
With any processing method of the processing of described C face, the processing of R face, from the viewpoint of productivity, fine finishining quality, emery wheel uses the bond diamond wheel of type of metal more.Usually, the relation of glass substrate intensity after process velocity and the processing is generally used the diamond particles of screen size at #325～#600.Surface roughness with the glass plate end edge portion of such grinding wheel processing is generally mean roughness R
aAt 0.5～1.0 μ m.Above-mentioned chamfer machining is called time processing (with reference to Fig. 9 (c), Figure 10, Figure 11).
In addition, generally speaking, in the diamond wheel of metal adhesion type,, only form (being generally with band wax bonding) specific thickness at the peripheral part of the wheelspan (being generally annular disk) of aluminium matter or steel because adamantine metal adhesive linkage price is high.
But in above-mentioned time processing, the surface roughness of glass plate end edge portion is big sometimes, in the manufacturing process of flat-panel screens, can bring variety of issue.Promptly; In washing procedure, pollute cleaning solution attached to the dirt on the glass plate end edge portion; Or the glass fine powder of peeling off attached to the dirt on the glass plate end edge portion or from the glass plate end edge portion is sent out dirt manufacturing process; Because the file effect of the big glass plate end edge portion of surface roughness, the alignment pin abrasion of manufacturing installation produce troubles such as location that these abrasion cause is bad.
Therefore, need reduce the surface roughness of the glass plate end edge portion of chamfering.As its means; (screen size is in the diamond particles of #1000～#2000), and the processing of the emery wheel (wheel) used of the identical shaped fine finishining of having used cross sectional shape to be shaped as to use with time processing of emery wheel (wheel) after said time processing, to use high order number.In addition, above-mentioned chamfer machining is called secondary operations (with reference to Fig. 9 (d)).
But the method productivity of carrying out such secondary operations is low, in addition since the glass plate that glass plate is ground through emery wheel remove thickness only little by little, therefore also need improve the equipment precision of beveler self.Therefore, installation cost improves, and is unrealistic.
In addition; Though attempted the processing of using the grinding of cerium oxide and on macromolecular fibre, adhering to the abrasive cloth or the wheel of polishing particles; But exist the life-span of any emery wheel all to lack, or the problems such as control difficulty of best grinding state, productivity reduction etc. caused.In addition, significantly cost improves also impracticableization.
In addition, recently, propose, make diamond wheel, carry out the method (TOHKEMY 2000-167753) of chamfer machining with respect to the plane of glass substrate angle of inclination butt with regulation mainly in the processing of annular glass substrate (substrate of disk).According to this method, only just can realize the raising of quality (surface roughness), productive significantly lifting with time processing (not needing secondary operations).
But,, exist and the above-mentioned same problem of secondary operations owing to use diamond wheel.Promptly; In order in the processing of one-level, to realize the raising of quality (surface roughness); At least need use the diamond particles of screen size, but owing to be the diamond particles of high order number, process velocity there is restriction at the high order number of #600～#800 degree; Therefore worry the sieve pore blockade of diamond wheel, not chamfering (diamond wheel is contact workpiece not, produces undressed portion), problem such as burn.In addition, the consumption of emery wheel is also bigger.And then; Owing to be diamond particles; The requirement of the height of the forming accuracy of emery wheel and the equipment precision of processing unit (plant), control accuracy is indispensable, therefore sees at aspects such as productivity, installation costs, and be unpractical for flat-panel screens with the suitable of glass plate.
Summary of the invention
The present invention sets up in order to solve above-mentioned problem; The end edge portion Ginding process of glass plate is provided; When making the chamfering wheel rotation, make the circumference of this chamfering wheel and the end edge portion butt of glass plate; And make this chamfering wheel relatively move and the end edge portion of glass plate is ground along the end edge portion of glass plate, said chamfering wheel perhaps constitutes through configuration abrasive particle in resin structure through constituting between the fiber by resin fiberfill structure body; The profile of said fiber construct is that roughly discoid and circumference disk forms the cross section concavity; The profile of said resin structure is that roughly discoid and circumference disk forms the cross section concavity, it is characterized in that the rotating shaft of said chamfering wheel is with respect to the vertical line inclination predetermined angular perpendicular to glass pane surface.
In addition; The present invention provides the end edge portion Ginding process of glass plate; When making the chamfering wheel rotation, make the circumference of this chamfering wheel and the end edge portion butt of glass plate; And make this chamfering wheel relatively move and the end edge portion of glass plate is ground along the end edge portion of glass plate, said chamfering wheel is filled through configuration abrasive particle in the fiber of fiber construct or between fiber and by resin and is constituted between this fiber, and the profile of said fiber construct forms the cross section concavity for discoid and circumference disk roughly; It is characterized in that the rotating shaft of said chamfering wheel is with respect to the vertical line inclination predetermined angular perpendicular to glass pane surface.
If adopt these end edge portion Ginding process, just can realize that productivity improves and the good chamfer machining of surface roughness of machined surface.
In the present invention; Preferably; When the end edge portion to each limit of glass plate grinds; Said chamfering wheel moves on respect to the direction of end limit in approximate vertical of glass plate and contacts the end limit of said glass plate when grinding beginning, the end limit of leaving said glass plate grinding that said chamfering wheel when finishing moves on the approximate vertical direction with respect to the end limit of glass plate.
The chamfering wheel that uses among the present invention because resin or fiber construct and resin are constituted as main body, so is that the diamond wheel of metal is compared with wheel base, and modulus of longitudinal elasticity is little.Therefore; Under the situation that runs through processing (give the relative motion of workpiece and emery wheel one direction and process processing method); Though can set penetraction depth significantly, produce defective in the end on the limit of glass plate easily when finishing in when beginning processing.In this case, the contact or leave as long as chamfering wheel moves on respect to the limit approximate vertical direction of glass plate just can be avoided through feeding and processed the defective of bringing.
Description of drawings
Fig. 1 is the concept map (plane is seen) of flow process of processing of the glass plate end edge portion of the explanation end edge portion Ginding process that comprises glass plate of the present invention;
Fig. 2 is (a) and (b), (c), (d) of Fig. 1, the AA line profile of (e) each state;
Fig. 3 be in fiber or fiber between dispose the concept map of the fiber construct that abrasive particle forms;
Fig. 4 is the concept map that explanation is utilized in the employed chamfering wheel of invention, has carried out the abrasion of the chamfering wheel under the state that the end edge portion of glass plate processes with common processing method
Fig. 5 is the concept map of the position relation of explanation glass plate and chamfering wheel;
Fig. 6 is that expression changes the angle of inclination of glass plate and makes the figure of wheel cross sectional shape of the situation of itself and chamfering wheel butt;
Fig. 7 is that the expression inclination angle is the figure of machining state of chamfering wheel and the position between glass plate relation and glass plate of 10 °, 20 °, 30 ° state;
Fig. 8 is the concept map that the motion of the chamfering wheel when end edge portion to glass plate grinds is described in the present invention;
Fig. 9 is the profile of the end edge portion of the glass plate when chamfer machining is proceeded to secondary operations;
Figure 10 is the concept map (plane see) of explanation with the processing method of the existing so-called R face processing or the processing that is shaped;
Figure 11 is the (a) and (b) of Figure 10, the BB line profile of (c) each state.
Label declaration
1: glass plate
2: chamfering wheel
3: diamond wheel
4: abrasive particle
5: fiber construct
6: fiber
7: bonding agent
8: glass plate by means of abrasion
9: the vertical line that erects on the surface of glass plate
10: the rotating shaft of chamfering wheel
The specific embodiment
Fig. 1 is the concept map (plane is seen) of work flow of the glass plate end edge portion of the explanation end edge portion Ginding process that comprises glass plate of the present invention, and Fig. 2 is (a) and (b), (c), (d) of Fig. 1, the AA line profile of (e) each state.The arrow Y of Fig. 1 (b) in (d) representes the direction that relatively moves of glass plate 1 and diamond wheel 3, glass plate 1 and chamfering wheel 2.In (b) of Fig. 1, Fig. 2 and existing method likewise utilize the shaping processing of diamond wheel 3, form the shape of the end edge portion of glass plate 1.In (d) of Fig. 1, Fig. 2, the end edge portion Ginding process of the glass plate 1 of embodiment of the present invention utilizes chamfering wheel 2 to carry out fine finishining.
The chamfering wheel 2 that uses in the preferred embodiment of the invention is filled between this fiber through configuration abrasive particle in the fiber of fiber construct or between fiber and by polyurethane resin and is constituted, and the profile of said fiber construct is that roughly discoid and circumference disk forms the cross section concavity.
Fiber construct can enumerate with chemical fibres such as Fypro, polyester fiber be processed into the fiber construct of nonwoven shape, with the range upon range of randomly fiber construct that presses solidly (extruding) of the chemical fibres such as Fypro of specific length, use the fiber construct of natural fiber such as wool etc.Wherein, chemical fibre is preferred aspect intensity, wherein special preferred polyamide fiber.
The rugosity of the employed fiber of fiber construct is preferably 5～20 Denier, is preferably 12～14 Denier especially.If be lower than 5 Denier, not only be difficult in fiber, keeping abrasive particle, and produce the problem of the rigidity reduction of chamfering wheel 2, on the other hand,, then be difficult between fiber, keeping abrasive particle if surpass 20 Denier, be inappropriate therefore.
In order in fiber or between fiber, to dispose abrasive particle, can use diamond, carborundum, aluminium oxide etc.Wherein, if comprehensively the grinding quality (surface roughness) of glass plate, process velocity, abrasive particle cost etc. are estimated, preferred especially aluminium oxide.For the particle diameter of abrasive particle, though screen size can be used #500～#2000, aspect the grinding quality (surface roughness) of glass plate, process velocity, preferred #700～#1500.
Fig. 3 is the concept map that in fiber, perhaps disposes the fiber construct 5 of abrasive particle between fiber, representes that respectively (a) is that the whole stereogram of fiber construct, (b) are part (circle the is interior) enlarged drawing of the fiber construct of (a), part (in the circle) enlarged drawing that (c) is the fiber of (b).
In Fig. 3 (b), fiber 6,6 ... Each other through the bonding three-dimensional structure that forms of bonding agent 7 part property. Abrasive particle 4,4 ... Attached to the surface of fiber 6 and the surface of bonding agent 7.In addition, shown in Fig. 3 (c), abrasive particle 4 also can be configured in the inside of fiber 6.
Fiber 6,6 at fiber construct as shown in Figure 35 ... Between the raw material of filled with polyurethane foam resin, form polyurethane resin afterwards, chamfering wheel 2 is accomplished thus.In addition, constitute also can for: abrasive particle 4 is disperseed, at fiber 6,6 ... Between polyurethane resin in also dispose abrasive particle 4.
The hardness of chamfering wheel 2 under the state of having accomplished is preferably based on GS701 type (ball-type) the scleroscopic C scale value of teclock manufactured in 45～90 scope, more preferably 70～90 scope.If the C scale value less than 45, produces the slow problem of grinding rate,, produce the big problem of surface roughness of processed workpiece if the C scale value surpasses 90.
Chamfering wheel 2 though also have with the formation that does not comprise abrasive particle between the fiber of resin fiberfill structure body, perhaps disposes the formation (formation that does not have fiber construct) of abrasive particle etc. in resin except that above-mentioned formation.So long as after the end edge portion Ginding process of the glass plate of the present invention stated, even the effect of then using these chamfering wheels also can obtain to stipulate.Therefore, to compare advantage big with the end edge portion Ginding process of existing glass plate.But at aspects such as the grinding quality (surface roughness) of glass plate, process velocities, what are inferior to the chamfering wheel 2 of above-mentioned formation.
The chamfering wheel 2 that uses among the present invention is compared with diamond wheel, and hardness is low, and grinding ratio is also lower in addition.Therefore, in the general processing method (state of Fig. 1 (b), Fig. 2 (b)) of using diamond wheel,, therefore take turns very fast approach exhaustion of life-span because the abrasion of the contact portion of chamfering wheel 2 and glass plate are many.Below, its summary is described.
Fig. 4 is that explanation utilizes the chamfering wheel 2 that uses among the present invention, has carried out the concept map of the abrasion of the chamfering wheel 2 under the state that the end edge portion of glass plate 1 processes with common processing method (state of Fig. 1 (b), Fig. 2 (b)).The epimere of Fig. 4 is a stereogram, and hypomere is the plane corresponding with epimere.Be pressed the original state of (a) under the state of discoid chamfering wheel 2 of rotation to (b) state-transition (c) along with the abrasion of chamfering wheel 2 from glass plate 1.Like this, only used the part of chamfering wheel 2.
On the other hand, different with diamond wheel, chamfering wheel 2 used in the present invention is favourable in the following areas.Promptly; The chamfering wheel 2 that uses among the present invention, because to be that metal diamond wheel is compared modulus of longitudinal elasticity little with wheelbase, thereby easy deformation; Even under the cross sectional shape condition of different of the cross sectional shape of chamfering wheel 2 and glass plate 1, but the also cross sectional shape of profiling glass plate 1.Thus, even the cross sectional shape the during manufacturing of chamfering wheel 2 is different with the cross sectional shape of glass plate 1, the use of also can after chamfering wheel 2 is included in, remaining untouched.
In addition, in other words the situation that the abrasion of the chamfering wheel 2 that uses among the present invention are many is the cross sectional shape of profiling glass plate 1.Therefore, even the cross sectional shape when making chamfering wheel 2 is different with the cross sectional shape of glass plate 1, in addition,, also can adapt to optimal state through the abrasion of chamfering wheel 2 in the use even how many adjustment when chamfering wheel 2 is installed departs from.In addition, about design load, therefore need all to not process special-purpose chamfering wheel to the cross sectional shape of each glass plate 1 owing to the cross sectional shape that is not subject to glass plate 1 like this.
In addition, the situation that the abrasion of the chamfering wheel 2 that uses among the present invention are many also is so-called selfrepair property.Under the situation for diamond wheel, along with use, usually the front end of visible diamond abrasive grain wears away and makes and grind the phenomenon that load rises, and per stipulated time need be repaired and waited disposal, so breaks in production inevitably.On the other hand, in the chamfering wheel 2 that uses in the present invention,, often expose new abrasive particle, therefore can not see and grind the phenomenon that load rises, do not need the finishing of per stipulated time owing to be accompanied by the abrasion of chamfering wheel 2.That is, become the so-called selfrepair state of repairing simultaneously with the processing of workpiece.
The shape of chamfering wheel 2 is according to the size (planar dimension, thickness of slab) of glass plate 1 and difference, not special the qualification, but for example, can use external diameter is that 150～250mm, thickness are the discoid of 20～40mm.Under the situation that is diamond wheel; Because the diamond abrasive grain price of using is high; Therefore only partly form abrasive grain layer mostly at Rack, the specific thickness of taking turns periphery; But because chamfering wheel 2 can use cheap material, therefore this worry needn't be arranged, can beyond the established part at wheel center, all form abrasive grain layer.
The chamfering wheel 2 that uses among the present invention, owing to compare with diamond wheel (processing with metallic substrate usually), rigidity is low, therefore takes turns the thick above thickness of regulation that has, and is convenient to make, handle.In addition; The rotating shaft that employing of the present invention makes chamfering wheel 2 is during with respect to the Ginding process of the vertical line inclination predetermined angular that erects in glass pane surface; Because the thickness of wheel part can all be participated in attrition process (stating after this relation), thereby preferably has the above thickness of regulation.
As the chamfering wheel that uses among the present invention 2, can use for example the polyurethane alumina lap wheel (model: MG-SF, external diameter 250mm, internal diameter 127mm, thickness 30mm) of Sumitomo 3M corporate system or the polyurethane alumina lap wheel (model: GF-H, #1000, external diameter 250mm, internal diameter 127mm, thickness 30mm) of field, angle Block ラ シ corporate system etc.
The rotating shaft that makes chamfering wheel 2 with respect to the vertical line that erects on glass plate 1 surface in the Ginding process of the direction inclination predetermined angular that relatively moves of glass plate and chamfering wheel 2, the position relation of glass plate 1 and chamfering wheel 2 is shown in Fig. 1 (d), Fig. 2 (d).Fig. 5 is for specifying the concept map of above-mentioned position relation, and expression (a) is that stereogram, (b) are front elevation for plane, (c) respectively.
Arrow R among Fig. 5 representes the direction of rotation of chamfering wheel 2, and arrow Y representes the direction that relatively moves of glass plate 1 and chamfering wheel 2.In addition, in (c), 9 are illustrated in the vertical line that glass plate 1 surface erects, the rotating shaft of 10 expression chamfering wheels 2.
Then, the optimal cross section shape to the circumference that makes angle that chamfering wheel 2 tilts and chamfering wheel 2 describes.The angle that Fig. 6 representes to make straight one side of glass plate 1 to change to tilt and with external diameter be 250mm (representing with 250 Φ among the figure), when thickness is chamfering wheel 2 butts of 30mm (representing with 30t among the figure), the circumference of chamfering wheel 2 becomes the wheel cross sectional shape of the state that the limit with glass plate 1 seamlessly joins.The numeral of lower end makes the angle that chamfering wheel 2 tilts among the figure.That is, illustrating the inclination angle is 0 °, 5 °, 10 °, 20 °, 30 ° state.In addition, though hypothesis is that thickness of slab is the glass plate of 0.7mm, because for the thickness (30mm) of chamfering wheel 2, the thin thickness of glass plate 1, so the inclination angle is under the situation beyond 0 ° is made as 0mm with the thickness of glass plate 1 and maps.
In Fig. 6, be under 0 ° the situation at the inclination angle, become the state that the limit of the wide part (reduced scale than actual is big) of the 0.7mm of the central portion of only taking turns thickness direction and glass plate joins.Be under 5 ° the situation at the inclination angle, only become the state that joins on the limit of about 73% part of wheel thickness direction and glass plate.Though at the inclination angle 7～45 ° scope (being illustrated as a part omits), the state that the limit that becomes glass plate and whole part of wheel thickness direction are joined, the concave shape degree of depth of taking turns circumference is according to the inclination angle and difference.In addition, the dotted line among the figure is represented the abrasion state of chamfering wheel 2.
Fig. 7 is that the inclination angle in the presentation graphs 6 is the figure of machining state of position relation and glass plate 1 of chamfering wheel 2 and glass plate 1 of 10 °, 20 °, 30 ° state.Wherein (a) is the stereogram of the position relation of expression chamfering wheel 2 and glass plate 1, (b), (c), (d) represent that respectively the inclination angle is the figure of machining state of position relation and glass plate 1 of chamfering wheel 2 and glass plate 1 of 10 °, 20 °, 30 ° state.
In (b), (c) of Fig. 7, (d), be illustrated in the A circle under the state of (a) with profile or chamfering wheel 2 in the B circle and the relation of the position between the glass plate 1.Among each figure, arrow is represented the direction that relatively moves of glass plate 1 and chamfering wheel 2.In addition, in (b), (c), (d), the stereogram of the state of the end edge portion that is illustrated in the glass plate 1 that each state processes is merged and representes.In each stereogram, 8 the expression glass plates 1 by means of abrasion.
Be 10 ° state (a) at the inclination angle, the concave shape of chamfering wheel 2 is carved into more deeply, and the part on the surface beyond the end edge portion of glass plate 1 is also ground.In addition, because the front end attenuation of the concave shape of chamfering wheel 2, so this part might produce breakage.On the other hand, at the inclination angle 30 ° state (c), being carved into of the concave shape of chamfering wheel 2 is more shallow, and the part of the end edge portion of glass plate 1 becomes does not have polished state.Be 20 ° state (b) at the inclination angle, do not have the problem as (a), (c).
If these are carried out overall merit, when being 7～15 ° low-angle at the inclination angle, might need the above degree of depth being carved into the wheel concave shape on the glass plate 1, the wheel lifetime might be damaged the end edge portion plane in addition of glass plate in addition.On the other hand, when the inclination angle was 25～45 °, the concave shape of wheel shoaled, and became the state that can only grind the fore-end of glass plate end edge portion.Whole face for this is remedied to the glass plate end edge portion grinds equably; Need to improve the contact pressure of glass plate 1 and chamfering wheel 2; Make the contact portion strain of chamfering wheel 2, but improved the grinding resistance therefrom, in this case; In the glass plate below thickness 1mm, the probability that breaks is high.
According to more than, optimum incline angle is different with thickness because of the external diameter of chamfering wheel 2, but is preferably 15～25 °.In the scope at above-mentioned inclination angle, the end edge portion of chamfering wheel 2 and glass plate 1 is butt equably, and the wheel end face portion keeps roughly certain concave shape and wears and tears.Therefore, take turns the footpath even wheel wears and tears and diminish, also can keep stable grinding rate.In addition, the end face portion of wheel is shaped as the sag vertical curve shape according to wheel footpath and inclination angle one meaning ground decision.In addition, be more than 45 ° the time at the inclination angle, the abradant surface deflection one side side of glass plate 1, so the benefit that the present invention brings is few.
According to the present invention and existing method compare, not only can use chamfering wheel whole efficiently, and not need the Position Control of high-precision chamfering wheel or glass plate.Thereby, because the cost of chamfering wheel is low, and do not need the high precision int, High Accuracy Controlization etc. of beveler, so installation cost being low, compares with existing method, cost reduces.
In the present invention; Preferably when the end edge portion to each limit of glass plate 1 grinds; When grinding beginning; Chamfering wheel 2 moves and contacts in the end limit approximate vertical direction with respect to glass plate 1, and when grinding end, said chamfering wheel 2 moves and leaves in the end limit approximate vertical direction with respect to glass plate 1.
Fig. 8 illustrates above-mentioned relation.Among the figure, before grinding, chamfering wheel 2 is in (a) position and is rotated.When grinding beginning, chamfering wheel 2 moves to (b) position, to glass plate 1 incision prescribed depth.Then, chamfering wheel 2 is under the state of glass plate 1 incision prescribed depth, moves to (c) position (in addition, can be static for glass plate 1 and formation that chamfering wheel 2 moves, also can be static for chamfering wheel 2 and formation that glass plate 1 moves) with fixing speed.When grinding end, chamfering wheel 2 is kept out of the way from (c) position, moves to (d) position.
The chamfering wheel 2 that uses among the present invention is compared with diamond wheel; Though modulus of longitudinal elasticity is little; Can set penetraction depth significantly; But through feed under the situation of processing the end (bight) from the limit of glass plate 1, when the processing incision, produces defective in the end on the limit of glass plate 1 easily when finishing.In this case, as shown in Figure 8, as long as chamfering wheel 2 moves and contacts or leave in the direction with respect to the limit approximate vertical of glass plate 1, just can avoid the above-mentioned defective of processing the glass plate 1 that causes of through feeding.
In addition; The lapping mode of chamfering wheel 2; Can for chamfering wheel 2 with the regulation power by the level pressure cut-in manner that is pressed on the glass plate 1; Also can on glass plate 1, cut given size, specific length is being added man-hour, cut and set the sizing cut-in manner of the given size of the abrasion loss that is equivalent to chamfering wheel 2 again for chamfering wheel 2.
The present invention is not only applicable to LCD and uses glass plate, and the big plasma display of thickness of slab also is suitable for glass plate etc.In addition, be not only applicable to flat-panel screens and use glass plate, for example the automotive glass plate also is suitable for.The glass plate of automobile side-window how not inserting use under the state that exposes on framework ground, has the advantage that makes the end edge portion mirror-polishing.In addition, can be adaptable across the processing of various glass plates.
[embodiment]
Use chamfering wheel (the polyurethane alumina lap wheel of field, angle Block ラ シ corporate system that according to the curvature that is designed end face has been carried out processing in advance; Trade name: GF grinding, model: GF-H, #1000, external diameter 250mm, internal diameter 127mm, thickness 30mm); At circumferential speed is that the angle of inclination of 1600m/ branch, chamfering wheel is that 19 °, approach are that the feed speed of 5 μ m, chamfering wheel is under the 6m/ condition of dividing, and carries out the attrition process of the end edge portion of glass plate.In addition, cooling agent (cooling fluid) uses running water.
Glass plate use alkali-free glass (the Asahi Glass corporate system, trade name: AN), rectangle, be of a size of 500 * 400mm, thickness of slab is the glass plate of 0.7mm.The end edge portion of glass plate carries out time processing (with reference to Fig. 9 (c)), surface roughness R
aBe 0.5 μ m (contact pin type surface roughometer :) by the system サ of Tokyo Micronics Inc. one Off コ system 1500.
Though work in-process does not carry out the correction of the end edge portion of chamfering wheel, carry out the end edge portion attrition process of about 9000 glass plates continuously, can not have problems (crackle of glass plate, defective etc.), processed grinding quality (surface roughness) is also more stable, R
aBe 0.1 μ m (contact pin type surface roughometer :) by the system サ of Tokyo Micronics Inc. one Off コ system 1500.
In addition; Under same condition, carry out plasma display with glass plate (Asahi Glass corporate system; Trade name: PD-200), rectangle, be of a size of 900 * 600mm, thickness of slab is the end edge portion attrition process of the glass plate of 2.5mm, can obtain and above-mentioned roughly the same result.
In addition; Use between the fiber of fiber construct and to be filled by resin but do not contain chamfering wheel, and the configuration abrasive particle forms in resin structure the chamfering wheel (not having fiber construct) of abrasive particle; Carry out with above-mentioned identical end edge portion attrition process after, can obtain and above-mentioned roughly the same result.
The invention effect
According to the present invention, productivity is high and make the chamfer machining of the surface roughness lifting of machined surface become possibility.That is, the chamfering wheel of the application of the invention can promote the surface roughness of machined surface.In addition, the grainding capacity of chamfering wheel is stable, need not repair processing, and the life-span of chamfering wheel is also long.And then the wheel that need not carry out the processing of ora terminalis shape to the chamfer shape of each workpiece does not accurately need high precision equipment, can carry out stable long processing.In addition, also prevent crackle, defective at the glass plate of processing starting point and process finishing point.
Claims (4)
1. the end edge portion Ginding process of a glass plate; When making the chamfering wheel rotation, make the circumference of this chamfering wheel and the end edge portion butt of glass plate; And make this chamfering wheel relatively move and the end edge portion of glass plate is ground along the end edge portion of glass plate, said chamfering wheel perhaps constitutes through configuration abrasive particle in resin structure through constituting between the fiber by resin fiberfill structure body; The profile of said fiber construct is that roughly discoid and circumference disk forms the cross section concavity; The profile of said resin structure is that roughly discoid and circumference disk forms the cross section concavity, it is characterized in that
The rotating shaft of said chamfering wheel is with respect to the vertical line inclination predetermined angular perpendicular to glass pane surface.
2. the end edge portion Ginding process of a glass plate; When making the chamfering wheel rotation, make the circumference of this chamfering wheel and the end edge portion butt of glass plate; And this chamfering wheel is relatively moved along the end edge portion of glass plate and the end edge portion of glass plate is ground; Said chamfering wheel is filled between this fiber through configuration abrasive particle in the fiber of fiber construct or between fiber and by resin and is constituted; The profile of said fiber construct is that roughly discoid and circumference disk forms the cross section concavity, it is characterized in that
The rotating shaft of said chamfering wheel is with respect to the vertical line inclination predetermined angular perpendicular to glass pane surface.
3. according to claim 1 or claim 2 the end edge portion Ginding process of glass plate, wherein, the angle of said inclination is 15～25 ° on the direction that relatively moves of glass plate and chamfering wheel.
4. like the end edge portion Ginding process of claim 1,2 or 3 described glass plates; Wherein, When the end edge portion to each limit of glass plate grinds; Said chamfering wheel moves on respect to the direction of end limit in approximate vertical of glass plate and contacts the end limit of said glass plate when grinding beginning, the end limit of leaving said glass plate grinding that said chamfering wheel when finishing moves on respect to the direction of end limit in approximate vertical of glass plate.
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| CN2010105027676A CN102441828A (en) | 2010-09-30 | 2010-09-30 | End edge grinding method for glass substrates |
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| CN2010105027676A CN102441828A (en) | 2010-09-30 | 2010-09-30 | End edge grinding method for glass substrates |
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| CN2010105027676A Pending CN102441828A (en) | 2010-09-30 | 2010-09-30 | End edge grinding method for glass substrates |
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Application publication date: 20120509 |