CN103936272A

CN103936272A - Cutting method for large-area toughened glass substrate

Info

Publication number: CN103936272A
Application number: CN201310016805.0A
Authority: CN
Inventors: 陈胜雄
Original assignee: Luminous Optical Tech Co Ltd
Current assignee: Luminous Optical Tech Co Ltd
Priority date: 2013-01-17
Filing date: 2013-01-17
Publication date: 2014-07-23

Abstract

The invention discloses a cutting method for a large-area toughened glass substrate. The method comprises the following steps: arranging at least a partition on the surface of a large-area mother glass substrate so as to outline the edges of a small workpiece that is about to produce; subjecting the glass substrate to a reinforcement process so as to form a compressive stress layer on the surface and a tensile stress layer in the interior; and finally cutting the glass substrate along the partition so as to obtain the needed small piece; wherein the partition is a groove that is recessed into the surface of the glass substrate, the depth of the groove is deeper than or equal to the depth of the compressive stress layer of the glass substrate; the partition can also be a hollow groove that goes through the upper surface and lower surface of the glass substrate, at least a rib is arranged in the hollow groove, and the rib is connected to two opposite side walls of the hollow groove.

Description

The cutting method of big area chilled glass base material

Technical field

The present invention relates to a kind of chilled glass cutting method, more particularly, is a kind of method that can be applicable to big area chilled glass base material to cut into most small workpiece.

Background technology

General glass baseplate is after strengthening process, can there is in glass surface formation one ion exchange layer (the Depth of exchange layer of stress, be called for short DOL), and correspondence is formed at inside tension stress (the Central tension in chilled glass, be called for short CT), make overall glass surface stress and inner tensions reach balance, make accordingly glass plate body produce the intensity of opposing impact and deformation fracture.Compressive stress layer after glass reinforced is thicker, and the intensity of chilled glass is just stronger, and the interior corresponding tension stress of its glass plate body is also larger; Therefore make after glass reinforced time to be easy to produce irregular cracked phenomenon in cutting, thus the production yield of the cutting splitting processing procedure that seriously detracts.

In the past for avoiding the technical difficulty of chilled glass aspect cutting, generally can advanced oozy glass cut into required shape specification and give again intensive treatment; But undersized after glass cutting, it needs loaded down with trivial details strengthening one by one in the time of strengthening, and therefore production efficiency is low, is difficult to meet the demand on processing procedure.

The cutting technique that is applied at present big area chilled glass base material is ripe gradually, known, China's patent application CN201010283667.9 document discloses a kind of chilled glass cutting method of preset path, its principal character is to plate one deck blocking layer in the region of the default line of cut of glass baseplate, in order to stop the ion-exchange quantity in glass baseplate strengthening processing procedure, the compressive stress layer that reduces this default cutting line area increases; Reduce accordingly follow-up cutting operation degree of difficulty, and avoid destroying the stress on glass pieces surface and inner tension stress balance, to promote the yield of cutting splitting processing procedure.

Separately, China's patent application CN201010299910.6 document discloses a kind of chilled glass cutting method and chilled glass cuts preset technology, it is characterized by: on the glass baseplate after strengthening processing, predetermined cuts path is set, the part compressive stress layer of being passed through in predetermined cuts path in the mode such as chemical milling or grinding is removed, therefore the corresponding tension stress that removes part will reduce, and can reduce glass ruptile and improving product yield in the time of cutting operation.

Described prior art, admittedly can utilize the compressive stress layer that is reduced in predetermined cuts path (region), to promote the cutting of big area chilled glass base material, but while implementing cutting splitting processing procedure, at the remaining compressive stress layer in predetermined cuts path (region), still can cause ruptile at cutting openings position, and near notching edge and otch section produce many tiny cracks, while causing bearing external force or temperature variation in follow-up procedure for processing or in use procedure, may cause crackle continue expansion or deepen, cause glass substrate produce distortion or break, in addition, after chilled glass slitting one-tenth majority is compared with small workpiece, destroyed by making at the bearing stress at position, cut edge and the equilibrium state of inner tension stress, cause the physical strength of workpiece seriously to detract, therefore, generally implement described prior art chilled glass slitting become to most compared with after small workpiece, also must be again through the process of edge trimming or secondary hardening, to guarantee that glass resists ability and the intensity of breaking.

Summary of the invention

In view of this, the invention provides a kind of cutting method that is applied to big area chilled glass base material, it can promote the yield of chilled glass excision forming, and after excision forming, can guarantee the planarization of notching edge, and maintain strength of glass, make glass-cutting workpiece without again through secondary hardening process, reach the object that reduces work program and cost.

In order to reach above-mentioned purpose, the cutting method of big area chilled glass base material provided by the present invention, implementation step is: on a large-area plain glass baseplate surface, at least one separation (Separation) is set, to define the small workpiece external form edge of wanting excision forming; Described glass baseplate is carried out to intensive treatment, make this glass baseplate surface form a compressive stress layer and form a tension stress layer in inner correspondence; And cut this glass baseplate along this separation, to split into each desired small workpiece.

Particularly, more than the described compressive stress layer degree of depth at least 5 μ m, to increase glass resistance, glass surface is had and keep out cracked and effect scratch.

Particularly, arrange on glass baseplate surface while separation, required hole, depression or relief configuration are also set simultaneously on glass baseplate

In one embodiment, described in be divided into the groove on recessed glass baseplate surface, and make the recessed degree of depth of this groove be more than or equal to the compressive stress layer degree of depth on described glass baseplate surface, to guarantee the easily processibility of cutting; The cross-sectional shape of described groove can be ˇ shape, shape, ㄩ shape or ∪ shape ... Deng, but the scope of implementing is not limited with aforementioned cross-sectional shape.

Particularly, in glass baseplate surface and this Wei Juyi scarp, groove side wall junction or cambered surface, wherein, be an obtuse angle setting between this scarp and the horizontal surface of glass baseplate, best, this obtuse angle is about 95 °-135 °; Can keep the planarization of small workpiece external form edge by the setting of this scarp or cambered surface, reduce the generation of hallrcuts, maintain stress and the tension stress equilibrium state of marginal end portion, to guarantee its physical strength.

Particularly, described groove is the corresponding upper and lower surface that is formed at glass baseplate respectively, at other embodiment, also can only described groove be arranged to one of the upper surface of glass baseplate or lower surface.

In one embodiment, describedly be divided into a kind of hollow slots that runs through glass baseplate upper and lower surface, and in hollow slots, at least there is a rib, can be connected between two opposite side walls of this hollow slots, particularly, the thickness of this rib is less than the thickness of this glass baseplate, makes this rib surface be step shape structure with glass baseplate surface, to guarantee the easily processibility of cutting.

About aforementioned and other technology contents, feature and effect of the present invention, in the following detailed description coordinating with reference to graphic embodiment, can clearly present; These embodiment are used for illustrating the present invention, can not be interpreted as limiting patent right scope of the present invention.

Brief description of the drawings

Fig. 1 is the orthographic plan of glass baseplate, be presented at glass baseplate draw be provided with groove and with the structure such as hole, breach of establishing;

Fig. 2 be Fig. 1 at the glass baseplate side of aminoacyl site cut-away view, show that a kind of cross section is slightly the groove of shape;

Fig. 3 be Fig. 1 at the glass baseplate side of aminoacyl site cut-away view, show that another kind of cross section is slightly " ˇ " groove of shape;

Fig. 4 be Fig. 1 at the glass baseplate side of aminoacyl site cut-away view, show that another kind of cross section is slightly " ㄩ " groove of shape;

Fig. 5 be Fig. 1 at the glass baseplate side of aminoacyl site cut-away view, show that another kind of cross section is slightly " ∪ " groove of shape;

Fig. 6 is the orthographic plan of small workpiece after cutting;

Fig. 7 is the side cut-away view of small workpiece external form edge after cutting;

Fig. 8 is the glass baseplate side cut-away view of another embodiment, shows that only the surface stroke at glass baseplate is provided with groove;

Fig. 9 is again the orthographic plan of an embodiment glass baseplate, be presented at glass baseplate draw be provided with hollow slots and with the structure such as hole, breach of establishing; And

Figure 10 be Fig. 9 at the glass baseplate side at B position cut-away view, show the structure of hollow slots and rib.

In figure:

Glass baseplate 1

Compressive stress layer 12

Small workpiece 2

Hole 21

Breach 23

Groove 3

Scarp 31

Hollow slots 5

Cambered surface 51

Rib 6

Embodiment:

In a preferred embodiment, the cutting method of big area chilled glass base material of the present invention, its step is as follows:

First, selecting a plate glass is glass baseplate 1 of the present invention, its upper and lower surface is one of at least tabular surface, another corresponding surface of this tabular surface can be tabular surface or uneven surface, for example convex surface, concave surface or male and female face etc., and the material of this glass baseplate is to be selected from soda lime glass, alumina silicate glass ... Deng, but the material ranges of implementing is not limited with previous materials.

Fig. 1 shows the orthographic plan of glass baseplate; Use cutting tool, such as laser knife, diamond cutter or tungsten-carbide knife etc., or use chemical milling means, carry over default small workpiece 2 external form edges draws and establishes groove 3 on glass baseplate 1 surface, in the formation that corresponds to each other of the groove on the upper and lower surface of glass baseplate, and in small workpiece 2, complete the structures such as required hole 21, breach 23 or depression simultaneously.

Fig. 2 and Fig. 3 are glass baseplate side cut-away view, show a kind of " ︺ " type and one " ˇ " the trench cross section shape of type, near its side wall tool one scarp 31 groove 3 openings, is one and is greater than 95 ° of above obtuse angle settings between this scarp and the horizontal surface of glass baseplate; And Fig. 4 and Fig. 5 show one " ㄩ " type and one " ∪ " the trench cross section shape of type, near its side wall tool one cambered surface 32 groove 3 openings; Separately, the indent degree of depth of groove 3 is about 50 μ m, and the width of groove does not limit, and must be only the corresponding default small workpiece 2 required proper ranges in external form edge.

Continue after groove 3 is established on glass baseplate 1 surface stroke, glass baseplate 1 is carried out to intensive treatment, taking chemical ion intensive treatment as embodiment at this, glass baseplate 1 is immersed in the sylvite bathing pool of melt, make the sodium ion on potassium ion and glass baseplate top layer carry out ion-exchange, so can make glass baseplate 1 surface form one deck compressive stress layer 12, and make glass baseplate inside derive suitable tension stress layer so that entirety reaches force balance, thereby make glass baseplate 1 plate body produce the intensity of opposing impact and deformation fracture; Preferably, aforementioned compressive stress layer 12 depth rangees about 5-90 micron (μ m) between, but implement scope be not limited with aforementioned depth range; The described compressive stress layer degree of depth is defined as 45 μ m in the present embodiment.

Finally, the glass baseplate 1 after intensive treatment is carried out to cutting splitting processing procedure, use cutting tool to carry over groove 3 and cut to obtain each independently small workpiece 2.Fig. 6 shows that orthographic plan, Fig. 7 of the rear small workpiece 2 of cutting show the side cut-away view of the rear small workpiece 2 of cutting, in the time that glass baseplate 1 is cut, due to the compressive stress layer degree of depth 12 that the degree of depth has exceeded glass baseplate surface that arranges of groove 3, therefore be easy to carry out cutting splitting at groove 3, and make otch end face smooth, particularly, by keeping the planarization of small workpiece 2 external form edges on the groove 3 default scarp 31 of side wall, reduce the generation of hallrcuts, more can maintain stress and the tension stress equilibrium state of marginal end portion, to guarantee its physical strength.

In aforementioned cutting splitting processing procedure, in the time that this groove 3 arranges dark or glass baseplate 1 thinner thickness using, aforementioned cutting tool is replaceable one-tenth one glass sliver pressing plate also, utilize this groove 3 of the direct crush-cutting of this glass sliver pressing plate to complete cutting splitting processing procedure, therefore can further save the cost of cutting processing.

Certainly, above-mentioned drawing on glass baseplate 1 surface established groove 3 modes only for illustrating, and the mode of enforcement is not as limit; In another embodiment of the present invention, Fig. 8 only shows on a glass baseplate 1 that a surface wherein draws the schematic diagram of the cross-section structure of establishing groove 3, understandable, draw the degree of depth of establishing groove 3 on single surface and should be greater than simultaneously and draw and establish the degree of depth of groove (referring to Fig. 2 to Fig. 5) on two surfaces, so that keep its easily processibility of cutting; Although the mode of establishing groove its easily processibility of cutting that can slightly detract is drawn on single surface, but one side is drawn and is established groove and can more two-sided stroke of mode of establishing groove more simplify procedure for processing, can reduce simultaneously and draw the working accuracy groove exactitude position of upper and lower surface (not must) of establishing groove, therefore can reach the object cutting down finished cost.

On Fig. 9,10 demonstration one glass baseplates 1, draw orthographic plan and the side cut-away structure chart of establishing hollow slots 5, hollow slots 5 is to carry over default workpiece 2 external form edges and offer, and this hollow slots runs through and is arranged at the upper and lower surface of glass baseplate, and near side wall hollow slots 5 openings is established a cambered surface 51; Separately, in hollow slots 5, be provided with rib 6, can connect between two opposite side walls of this hollow slots, and make the thickness of this rib 6 be less than the thickness of this glass baseplate, rib 6 is arranged with between the upper and lower surface of glass baseplate 1 (referring to Figure 10); In this embodiment, hollow slots 5 marks off desired small workpiece 2 external form edges, and this small workpiece 2 is fixed and linked into an integrated entity with glass baseplate 1 by the support of rib 6, so that the follow-up intensive treatment to glass surface; In the time that this glass baseplate through strengthening carries out cutting operation, because hollow slots 5 cuts out desired small workpiece 2 external form edges in advance completely, therefore make the operation of cutting splitting become very easy, can significantly reduce the fragmentation rate in processing procedure, and make otch end face smooth, particularly, by in the default cambered surface 51 of hollow slots 5 side wall, it not only can keep the planarization of small workpiece 2 external form edges, reduce the generation of hallrcuts, more can maintain stress and the tension stress equilibrium state of marginal end portion, to guarantee its physical strength.

The present invention is not limited to the above form; clearly with reference to after above-mentioned explanation; can there be improvement and the variation of more technology isotropisms; be with; such as be familiar with the personage of this case skill; have and under identical creation spirit, do relevant any modification of the present invention or change, all must be included in the category that the invention is intended to protection.

Claims

1. a cutting method for big area chilled glass base material, is characterized in that, comprises the following steps:

A, on a large-area plain glass baseplate surface, at least one separation is set, to define the small workpiece external form edge of wanting excision forming;

B, described glass baseplate is carried out to intensive treatment, make the surface of this glass baseplate form a compressive stress layer and in the inner corresponding tension stress layer that forms; And

C, cut this glass baseplate along this separation, obtain desired small workpiece to divide glass baseplate.

2. the cutting method of big area chilled glass base material according to claim 1, is characterized in that: wherein, be also included in described glass baseplate surface and arrange while separation, required hole, depression or relief configuration are set simultaneously on glass baseplate.

3. the cutting method of big area chilled glass base material according to claim 1, is characterized in that: wherein, and more than the compressive stress layer degree of depth at least 5 μ m on described glass baseplate surface.

4. the cutting method of big area chilled glass base material according to claim 1, it is characterized in that: wherein, the described groove that is divided into a recessed glass baseplate surface, and make the recessed degree of depth of this groove be more than or equal to the compressive stress layer degree of depth on described glass baseplate surface.

5. the cutting method of big area chilled glass base material according to claim 4, is characterized in that: wherein, the cross-sectional shape of described groove be ˇ shape or one of shape, and tool one scarp, handing-over position surperficial at described glass baseplate and groove side wall.

6. the cutting method of big area chilled glass base material according to claim 5, is characterized in that: wherein, between described scarp and the horizontal surface of glass baseplate, being one is the obtuse angle setting of 95 °～135 °.

7. the cutting method of big area chilled glass base material according to claim 4, is characterized in that: wherein, the cross-sectional shape of described groove is one of ㄩ shape or ∪ shape, and handing-over position tool one cambered surface surperficial at described glass baseplate and groove side wall.

8. the cutting method of big area chilled glass base material according to claim 4, is characterized in that: wherein, and the described groove system corresponding upper and lower surface that is formed at glass baseplate respectively.

9. the cutting method of big area chilled glass base material according to claim 1, it is characterized in that: wherein, describedly be divided into one and run through the hollow slots on the upper and lower surface of glass baseplate, and in this hollow slots, at least there is a rib, can be connected between two opposite side walls of this hollow slots.

10. the cutting method of big area chilled glass base material according to claim 9, is characterized in that: wherein, the thickness of described rib is less than the thickness of described glass baseplate, makes this rib surface be step shape structure with described glass baseplate surface.