201233514 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種用以對玻璃基板等脆性材料基板進行 劃線之劃線輪。 【先前技術】 , 先前之劃線輪係對於超硬合金製或燒結金剛石製之圓板 自兩側相互傾斜地削入圓周部，從而於圓周面形成v字形 之刀。劃線輪於中心具有貫通孔，自由旋轉地軸接於劃線 裝置之劃線頭等而使用。 於先前之劃線輪中，如專利文獻〗所示使用如下劃線 輪，即為了對刀尖賦予多點衝擊以提高對脆性材料基板之 滲透性，因而形成溝槽，且使溝槽之間形成突起。而且， 若使溝槽之個數增多，則可提高滲透性，從而亦有使用於 圓周上以特定深度形成有例如百十個溝槽之劃線輪。 [先前技術文獻] [專利文獻] [專利文獻1]曰本專利第3074143號公報 【發明内容】 [發明所欲解決之課題] 4 然而，具有先前之溝槽之劃線輪中，因為滲透性優異， 故可對脆性材料基板形成較深之劃線，但壽命相對較短。 因此存在劃線輪之更換頻率較高之缺點。 本發明係著眼於上述之先前之問題點而完成者，其目的 在於提供一種在具有溝槽之劃線輪中使其溝槽之形狀不同 158419.doc 201233514 而長壽命化之劃線輪。 [用於解決課題的手段] 為解決該問題，本發明係一種沿著圓板狀輪之圓周部形 成v字形之刃尖而成之劃線輪，於上述刃尖形成特定形狀 之溝槽，並且將拉引至上述溝槽兩端之兩條切線所成之切 線交叉角設為90。以上且135。以下。 此處，上述溝槽亦可為形成於稜線之圓周上之U字形之 溝槽。 此處’上述溝槽亦可為形成於棱線之圓周上之V字形之 溝槽。 [發明之效果] 如以上所說明’本發明係於劃線輪之刃尖之稜線部形成 /冓槽’使溝槽之間形成突起’因此利用該突起之作用，可 不產生水平裂痕而產生較長之垂直裂痕。另外，因使壽命 k長，故可獲得能夠減少劃線輪之更換頻率之優異效果。 【實施方式】 圖1(a)係本發明之第1實施形態之劃線輪之前視圖，圖 Ub)係其側視圖。另外，圖2係表示圖1(a)之小圓a所示之 部分之劃線輪之稜線部分之側面之局部放大圖。本實施形 態之劃線輪11為圓板狀之構件，於其中央部設置有用以穿 過旋轉軸之貫通孔12。而且，自兩側相互傾斜地削入圓周 部分，而於圓周面形成v字形之刃尖13。 /圖2所不，本實施形態尹，於刃尖13之稜線部分大致 均-地呈U字形進行切σ而形成多個溝槽…㈣㈣狀 158419.doc201233514 VI. Description of the Invention: [Technical Field] The present invention relates to a scribing wheel for scribing a brittle material substrate such as a glass substrate. [Prior Art] The conventional scribing wheel system is formed by cutting a circular plate made of a super-hard alloy or a sintered diamond into a circumferential portion obliquely from both sides, thereby forming a v-shaped blade on the circumferential surface. The scribing wheel has a through hole at the center, and is rotatably pivotally attached to a scribing head of the scribing device or the like. In the previous scribing wheel, as shown in the patent document, the following scribing wheel is used, that is, in order to impart a multi-point impact to the blade tip to improve the permeability to the brittle material substrate, grooves are formed and the grooves are formed. Protrusion. Further, if the number of the grooves is increased, the permeability can be improved, and there is also a scribing wheel which is formed on the circumference to form, for example, one hundred and ten grooves at a specific depth. [Prior Art Document] [Patent Document 1] [Patent Document 1] Japanese Patent No. 3074143 [Draft] [Problems to be Solved by the Invention] 4 However, in the scribing wheel having the previous groove, because of permeability Excellent, it can form a deep dash on the brittle material substrate, but the life is relatively short. Therefore, there is a disadvantage that the frequency of replacement of the scribing wheel is high. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a scribing wheel which has a longer groove shape in a grooved scribing wheel and which has a groove shape different from 158419.doc 201233514. [Means for Solving the Problem] In order to solve the problem, the present invention is a scribing wheel formed by forming a v-shaped blade edge along a circumferential portion of a disk-shaped wheel, and forming a groove of a specific shape at the blade edge. And the tangent crossing angle formed by the two tangent lines drawn to the two ends of the groove is set to 90. Above and 135. the following. Here, the groove may be a U-shaped groove formed on the circumference of the ridge line. Here, the groove may be a V-shaped groove formed on the circumference of the ridge line. [Effects of the Invention] As described above, the present invention is based on the formation of a ridge line portion of the blade end of the scribing wheel to form a protrusion between the grooves. Therefore, by the action of the protrusion, horizontal cracks can be generated without causing a horizontal crack. Long vertical cracks. Further, since the life k is long, an excellent effect of reducing the frequency of replacement of the scribing wheel can be obtained. [Embodiment] Fig. 1(a) is a front view of a scribing wheel according to a first embodiment of the present invention, and Fig. Ub) is a side view thereof. Further, Fig. 2 is a partially enlarged view showing a side surface of a ridge line portion of a scribing wheel of a portion indicated by a small circle a in Fig. 1(a). The scribing wheel 11 of this embodiment is a disk-shaped member, and a through hole 12 for passing through the rotating shaft is provided at a central portion thereof. Further, the circumferential portion is cut obliquely from the both sides, and the v-shaped blade tip 13 is formed on the circumferential surface. In the present embodiment, the ridge line portion of the blade edge 13 is substantially uniformly-cut in a U-shape to form a plurality of grooves. (4) (four) shape 158419.doc
V 201233514 之溝槽14之深度設為di ’藉由以固定間隔進行切口而形成 固定間距之突起。此處，將溝槽14之寬度設為Di，將突起 之寬度設為S1。此處，若將溝槽與突起相交之點作為交 點’則於自U字形之溝槽側向最接近交點之位置拉引切線 時’將兩條切線交又之角度設為切線交叉角α j。本實施形 態中’選擇與先前相比更大之角度作為該切線交又角α1， 此處設為90。。 此種沿著圓周之多個切口可藉由如下方法形成：使圓形 狀之磨石連結於磨床馬達而旋轉，與該磨床面正交地使劃 線輪11抵接於磨石，於該刀尖之稜線部切口形成一個溝槽 後’使劃線輪11暫時後退並僅旋轉相當於間距之旋轉角， 之後’再次遍及整個圓周而重複切口形成溝槽之處理。此 時根據圓形磨石之前端形狀，可形成各種形狀之溝槽。 本貫施形態之劃線輪，即便增大刃尖負載，亦不會產生 水平裂痕’而是以與該負載之大小成比例之方式獲得較長 之垂直裂痕。若該垂直裂痕長，則在下一步驟之斷裂作業 中，可沿著劃線準確地進行斷裂，從而良率提高。另外， 因斷裂作業較為容易’故可緩和或簡化斷裂步驟之内容， 根據情況亦可省略斷裂步驟。 其·人，與先前之劃線輪相對比對本實施形態之劃線輪之 優點進订說明。此處，本實施形態之劃線輪例如將輪直徑 為2.5 mm，將輪厚設為〇 65 mm。另外，溝槽之深度以 °又為9 μΐη，切線交叉角αΐ設為90。。另外，用作為比較對 象之先則之劃線輪如圖3所示，與本實施形態之劃線輪為 158419.doc 201233514 相同直徑’切口之深度d2設為10 μιη，將切口數設為13 5。 該先前之劃線輪中，將溝槽之寬度設為D2，將突起之寬度 設為S2，將切線交叉角α2設為82。。 圖4係表示使用該先前之劃線輪與本實施形態之劃線輪 對LCD(liquid crystal display，液晶顯示器）貼合基板進行 劃線時之使用實績之表。如圖4所示，使用先前之劃線輪 行進8000 m時，稜線產生21處缺損。即便其後想要繼續進 行劃線亦不會形成肋狀紋，不存在能夠劃線之負載範圍， 從而無法進行劃線。 相對於此，本實施形態之劃線輪於同一條件下行進8 〇 〇 〇 m時棱線之缺損為〇處。因此可再繼續進行劃線，可進行適 當之劃線直至因稜線之缺損以外之原因例如磨損等導致劃 線性此惡化為止。這樣本實施形態中藉由將溝槽之兩端之 切線所成之角度設為90。而可使劃線輪長壽命化。 此處’本實施形態中將切線交又角α1設為9〇。，但該角 度可設為90。以上135。以下，較佳為90。以上且12〇。以下。 若切線交又角α1變大，則對脆性材料基板之切入（削入）變 差，存在製造上之極限。因而本發明中將切線交叉角之最 大角設為135。。 其次，對本發明之第2實施形態之劃線輪進行說明。整 體構成與圖1所示者相同，僅刃尖之溝槽形狀不同。圖5係 表示第2實施形態之劃線輪之溝槽之放大圖。如該圖所 示，於刃尖之稜線部13以固定間隔切口形成ν字狀之溝槽 15。而且，將溝槽15之寬度設為m，將突起之寬度設為 158419.doc -6- 201233514 S3，由此形成固定間距之突起。於此情況下亦將切線交又 角α3設為90。，由此與先前例相比可長壽命化。 [產業上之可利用性] 上述之本發明之劃線輪除可用於對脆性材料基板進行劃 線之劃線裝置以外，還可用於手動切割型之劃線器。 【圖式簡單說明】 圖1(a)、圖1(b)係本發明之第丨實施形態之劃線輪之前視 圖及側視圖。 圖2係表示本發明之第丨實施形態之劃線輪之稜線部分之 局部放大圖。 圖3係表示先前例之劃線輪之稜線部分之局部放大圖。 圖4係表示先前例與本實施形態之以特定之推薦刀尖負 載對玻璃板進行劃線時之劃線輪之壽命實際成績之表。 圊5係表不本發明之第2貫施形態之劃線輪之複線部分之 局部放大圖。 【主要元件符號說明】 11 劃線輪 12 貫通孔 13 刃尖 14、15 溝槽 dl 溝槽之深度 D1 溝槽之寬度 S1 突起之寬度 αΐ 切線交叉角 158419.docThe depth of the groove 14 of V 201233514 is set to di ' to form a fixed pitch protrusion by slitting at regular intervals. Here, the width of the groove 14 is set to Di, and the width of the protrusion is set to S1. Here, if the point where the groove intersects the protrusion is used as the intersection point, then when the tangent is drawn from the side of the U-shaped groove toward the point closest to the intersection, the angle between the two tangent lines is set as the tangent crossing angle α j . . In the present embodiment, 'the angle larger than the previous one is selected as the tangent angle α1, which is set to 90 here. . Such a plurality of slits along the circumference can be formed by rotating a round-shaped grindstone to the grinder motor and abutting the scribing wheel 11 against the grindstone orthogonally to the grinder surface. After the ridge line portion of the pointed ridge line forms a groove, the process of temporarily forming the groove 12 to retreat and rotating only the rotation angle corresponding to the pitch, and then repeating the slit forming the groove again over the entire circumference. At this time, grooves of various shapes can be formed according to the shape of the front end of the round grindstone. The scribe wheel of the present embodiment does not cause horizontal cracks even if the blade tip load is increased, but a long vertical crack is obtained in proportion to the magnitude of the load. If the vertical crack is long, the fracture can be accurately performed along the scribe line in the breaking operation in the next step, so that the yield is improved. Further, since the breaking operation is relatively easy, the content of the breaking step can be alleviated or simplified, and the breaking step can be omitted depending on the case. The person and the person will explain the advantages of the scribing wheel of the present embodiment in comparison with the previous scribing wheel. Here, the scribing wheel of the present embodiment has, for example, a wheel diameter of 2.5 mm and a wheel thickness of 〇 65 mm. Further, the depth of the groove is again 9 μΐη, and the tangent crossing angle αΐ is set to 90. . In addition, the scribing wheel which is the first object to be compared is shown in Fig. 3, and the scribing wheel of the present embodiment is 158419.doc 201233514, and the depth d2 of the slit is set to 10 μm, and the number of slits is set to 13 5. In the preceding scribing wheel, the width of the groove is set to D2, the width of the protrusion is set to S2, and the tangent crossing angle α2 is set to 82. . Fig. 4 is a table showing the results of the use of the conventional scribing wheel and the scribing wheel of the present embodiment for scribing an LCD (liquid crystal display) bonded substrate. As shown in Fig. 4, when the previous scribing wheel was used for 8000 m, the ridge line produced 21 defects. Even if it is desired to continue the scribing, it will not form a ribbed pattern, and there is no load range in which the scribing can be performed, so that scribing cannot be performed. On the other hand, when the scribing wheel of the present embodiment travels 8 〇 〇 〇 m under the same condition, the defect of the ridge line is a defect. Therefore, the scribing can be continued, and the appropriate scribing can be performed until the linearity is deteriorated due to reasons other than the defect of the ridge line, such as abrasion. Thus, in the present embodiment, the angle formed by the tangent to both ends of the groove is set to 90. The life of the scribing wheel can be extended. Here, in the present embodiment, the tangential angle α1 is set to 9 〇. , but the angle can be set to 90. Above 135. Hereinafter, it is preferably 90. Above and 12〇. the following. If the tangential angle α1 becomes large, the cutting (shaving) of the brittle material substrate is deteriorated, and there is a manufacturing limit. Therefore, in the present invention, the maximum angle of the tangent crossing angle is set to 135. . Next, a scribing wheel according to a second embodiment of the present invention will be described. The overall configuration is the same as that shown in Fig. 1, and only the groove shape of the blade tip is different. Fig. 5 is an enlarged view showing a groove of the scribing wheel of the second embodiment. As shown in the figure, a rib-shaped groove 15 is formed at a regular interval at a ridge line portion 13 of the blade edge. Further, the width of the groove 15 is set to m, and the width of the protrusion is set to 158419.doc -6 - 201233514 S3, thereby forming protrusions of a fixed pitch. In this case, the tangent angle α3 is also set to 90. Therefore, the life can be extended as compared with the previous example. [Industrial Applicability] The scribing wheel of the present invention described above can be used for a hand-cut type scriber in addition to a scribing device for scribing a brittle material substrate. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 (a) and Fig. 1 (b) are a front view and a side view of a scribing wheel according to a third embodiment of the present invention. Fig. 2 is a partially enlarged plan view showing a ridge line portion of a scribing wheel according to a third embodiment of the present invention. Fig. 3 is a partially enlarged view showing a ridge line portion of the scribing wheel of the prior art. Fig. 4 is a table showing the actual results of the life of the scribing wheel when the glass plate is scribed with the specific recommended tool tip load in the prior art and the present embodiment. The 圊5 series shows a partial enlarged view of the double line portion of the scribing wheel of the second embodiment of the present invention. [Main component symbol description] 11 Scribe wheel 12 Through hole 13 Tip edge 14, 15 groove dl Depth of groove D1 Width of groove S1 Width of protrusion αΐ Tangent intersection angle 158419.doc