A7 __B7_ 五、發明說明（i ) 發明之詳细說明 發明所屬技術領域 本發明係有關於一種用於鋼材、非鐵材·、塑膠材料等的 切斷加工與挖槽加工等的圓形鋸刀。 習知技術及發明所欲解決之問題 自昔Μ來，在鋼材、鈦材等非鐵材、塑膠材料等切斷加 工與挖槽加工（開槽加工）等方面，如圖3所示，廣泛使用 刃部22形成於圓板21外周之圓形鋸刀（金工鋸）。金工鋸固 然安裝於圓鋸盤等*藉由高速旋轉對被切削材料加工，每 一刃的切削量少，惟由於設有多數切刃，故可有效進行切 斷加工與挖槽加工。 第4圖顯示習知金工鋸之刃部2 2形狀。刃部2 2由被切削 材切削用切刃23 ;具有負斜角（-/Θ ° ) *將切削之切屑導 入刃底24用的斜面25;具有空刃角)之第1空刃面26; Μ及對向第1空刃面26，鈍角相交的第2空刃面27所構成。 斜面25面向刃底24成緩傾圓弧狀或直線狀之表面。又*藉 由與斜面25相鄰的刃部22的第2空刃面27形成切屑凹穴28。 上述金工鋸由於斜面25的斜角為負，故可形成寬的刃部 2 2基端寬變，刃部2 2的強度、剛性極高。又由於可形成大 的切屑凹穴2 8，故Μ刃部2 2切削被切削材之際所產生的切 屑適當排出外部。 一般而言，在使用金工鋸進行切斷加工與槽加工情形下 ，為了提高切削性，必須盡可能加大斜面2 5的斜角，並加 大切屑凹穴28。惟，第4圖之刃部22形狀固然加大切屑凹 丨氏張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） —4 — ---------t (請先閱讀背面之注意事項再填寫本頁) 訂---------線- 經濟部智慧財產局員工消費合作社印製 A7 _B7_ 五、發明說明（2) (請先閱讀背面之注意事項再填寫本頁) 穴28，卻由於斜面25的斜角為負，故切剿性極差，實際上 並不怎麼實用。 因此，就提高切削性之刃部形狀而言，使用具有如第5 圖所示刃部31之金工鋸。此刃部31由切刃32;具有正斜角 (+a)之斜面；具有空刃角（γ·° )之第1空刃面34; Μ及對 向第1空刃面34，鈍角相交的第2空刃面35所構成。 於藉此金工鋸切削初切削材情形下，刃部3 1最好具有斜 面3 3的斜角為正的切削性。切削之切屑沿斜面3 3導入刃底 36，藉離心力排出外部。 惟，此種刃部3 1的形狀由於斜面3 3的斜角為正，故與第 4圖所示金工鋸相較，刃部3 1的基端寬度窄，刃部3 1的強 度、剛性降低，刃部3 1易於破損。且由於刃部3 1的基端寬 度寬，故若斜面3 3的斜角小*此時切削性即會趨劣*或易 於出現其構成之刃尖，而構成刃尖損壞的原因。 經濟部智慧財產局員工消費合作社印製 又，切削被切削材之際，會形成切屑持留於切屑凹穴3 7 內狀態，切屑排出會趨劣，易於發生切屑壅塞。因此，會 有被切削的加工面粗度不良，加工後的切削部份與槽部份 近傍易於產生毛剌與毛邊等問題。 本發明有鑑於上述問題點，旨在提供一種不會損及刃部 強度、剛性、切削性·、切屑的排出性良好的圓形鋸刀。 用以解決問題之手段 本發明之解決問題之裝置係於圓板外周部形成刃部，刃 部之斜面由具有正斜角之第1斜面；相較於第1斜面形成於 中心側，具有負斜角之第2斜面；Κ及平滑連接二斜面之 丨氏張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -5 - A7 _B7__ 五、發明說明（3 ) \ 連接面構成。 (請先間讀背面之注.意事項再填寫本頁) 根據上逑構成，一旦圓形鋸刀旋轉，被切削材即為切刃 所切削，切屑衝撞連接面K及具有負斜角之第2斜面，被 剪斷成較细部份。因此，切屑不會在切屑凹穴內造成壅塞 ，可適當排出外部。 又*若第2斜面形成較第1斜面寬，由於刃部基端的寬度 可變寬，故即使第1斜面的斜角加大，亦可增進刃部的強 度、剛性·、提高切削性。 發明之實施形態 以下參照附圖詳细說明本發明實施形態。第1圖係顯示 本發明一實施形態之用來作為金工鋸之圓彤鋸刀之刃部形 狀視圖。此金工鋸係安裝於圚鋸盤等上，高速旋轉，用於 鋼材之切斷加工與增加工者，由圓板1M及形成於其外周 之刃部2構成。刃部2由被切削材切削用切刃3 ;用來將切 削的切屑導入刃底4的斜面5 ; Μ及空刃面6構成。切刃3朝 旋轉方向突出形成。 斜面5由具有正斜角（+ α ° )之第1斜面7 ;相較於第1斜 經濟部智慧財產局員工消費合作社印製 面7形成於中心側，具有負斜角（-/3 ^ )之第2斜面8 ; Κ及 平滑連接二斜面7、8之連接面9構成。連接面9為了避免被 切削材被切削時所施負荷的應力集中，形成彎曲狀，具體 而言*形成圓弧狀。且，連接面9不限於此，形成多角狀 ，亦可成巨視下平滑狀態。又，根據第1圖，第1斜面7及 第2斜面8固然形成平面狀，惟亦可形成彎曲狀或波浪狀。 空刃面6由具有空刃角（r° )之第1空刃面10 Κ及對向第1 紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -6 - A7 _B7_ 五、發明說明（4 ) 空刃面10鈍角相交的第2空刃面11構成。第2空刃面11經由 刃底4連接於相鄰刃部2之第2斜面8，刃底4形成彎曲狀。 第2斜面8由於其面積較第1斜面7大，且第2斜面具有負 斜角，故刃部2基端寬度可加寬，充份確保刃部2的強度、 剛性。其上方與相鄰刃部2之間的空間可充份擴大成所謂 切屑凹穴ί2。因此，切削被切削材時，可大幅減少切屑凹 穴1 2内的切屑壅塞。結果，可抑制被切削材的切削部份近 傍的毛剌與毛邊等的發生，提高切削後製品，特別是提高 加工面的品質。 其次說明此金工鋸的切削動作。如第2圖所示，若高速 旋轉金工鋸* Μ切刃3切削被切削材S，由此所產生的切屑 Τ即沿刃部2之第1斜面7移動，與連接面9以及第2斜面8的 一部份激烈衝撞而初剪斷。亦即，連接面9及第2斜面8具 有切屑剪斷功能。而且，切屑Τ變成較綑小捲屑，比習知 刃部所切削之切屑小，藉離心力排出外部。 此時，由於切屑凹穴12變大*故不會如第5_所示之習 知金工鋸成切屑Τ持留狀態，故切屑Τ會順利排出外部。因 此*切屑Τ之排出性較習知者尤佳，亦提高切削性。 因此*如上所述，第2斜面8由於其面積較第1斜面7大， 故刃部2基端之寬度會變寬，可充份確保刃部2之強度、剛 性。藉此可擴大第1斜面7之斜角。亦即，由於切刃3可銳 化，故可大幅提高切削性。又，藉此可實現切削胆抗及切 削動力的低減，且甚少發生切削熱，结果，可設定而令金 工鋸的旋轉數與切削送料速度極高，大幅提高生產性。 紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -7 - (請先閱讀背面之注意事項再填寫本頁) tr---------線 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明說明（5 ) (請先閱讀背面之注意事項再填寫本頁) 因此，可抑制例如導熱率低的鈦及鈦合金等難削材料加 工之際的刃尖溫度上昇，可長時間穩定加工。並可延長刃 尖的壽命。 又，例如在鋁材加工上，具有極大正斜角的第1斜面7與 具有極大切屑凹穴12的刃部2固屬必要，惟本實施形態之 刃部形狀成最適於此種鋁材加工之形狀。又，即使對相 較於鋼材，比熱高，導熱率低》且熱膨脹係數高的塑膠材 料加工，若使用本實施形態之刃部2，即可防止加工面的 粗度惡化，切削部的不足Μ及加工面的變色。 且，本發明不限於上述實施形態*其可在本發明範圚內 對上述實施形態作多數修正及變更。例如，本實施形態之 刃部形狀可適用於開槽銑刀及冷鋸等的圓形鋸刀。 又，如上所述，第1斜面7之斜角cc可盡可愈加大。第2 斜面8之斜角/5固然考慮到切削的剪斷力，切屑凹穴1 2的 大小等最好為4 5 ° ，惟不限於此角度。 經濟部智慧財產局員工消費合作社印製 又，斜面5不僅由如上所述具有相反角度之二斜面構成 ，正少接近切刃的斜面亦可為由具有正斜角之三個Μ上之 斜面構成之複合面。 發明之效果 如Μ上，根據本發明，藉由使斜面成為複合面，切刃切 削所產生的切屑由於可由連接面及具有負斜角之斜面剪細 ，故切屑可適當排出外部。因此，可抑制被切削材之加工 部份發生毛刺及毛邊等，提高切削後製品的品質。 又，具有負斜角之第2斜面由於較具有正斜角之第1斜面 紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -8 - 五、發明說明（6 A7 B7 大，故刃部基端之寬度可加大*提高刃部之強度、剛性。 又，藉此可加大第1斜面之正斜角，大幅提高切削性，實 規切削阻抗及切削動力之低減，並使切削熱甚少發生。結 果，由於可設定而令圓形鋸刀之旋轉數及切削送料速度極 高，故可大幅増進生產性。 圖式之簡單說明 第 圖0 第 第 第 第 元件 1圖係顯示本發明一實施形態之金工鋸之刃部形狀視 2圖係顯示金工鋸切削時模樣之視圖。 3圖顯示習知金工鋸，（a )係側視圖* ( b )係正視圖。 4圖係顯示習知金工鋸之刃部形狀之視圖。 5画係顯示習知另一金工鋸之刃部形狀之視圖。 編號說明 I.-----------,· (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 α 第 1斜面之 斜 角 β 第 2斜面之 斜 角 7 空 刃 角 s 被 切 削材 τ 切 屑 1 圓 板 2 刃 部 3 切 刃 4 刃 底 5 斜 面 6 空 刃 面 訂---------線 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 9 A7 B7 五、發明說明（7 經濟部智慧財產局員工消費合作社印製 7 第1斜面 8 第2斜面 9 連接面 10 第1空刃面 11 第2空刃面 12 切屑凹穴 21 圓板 22 刃部 23 切刃 24 刃底 25 斜面 26 第1空刃面 27 第2空刃面 28 切屑凹穴 31 刃部 32 切刃 33 斜面 34 第1空刃面 35 第2空刃面 36 刃底 37 切屑凹穴 (請先閱讀背面之注意事項再填寫本頁) 訂---------參 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 10A7 __B7_ V. Description of the invention (i) Detailed description of the invention The technical field to which the invention belongs The present invention relates to a circular saw blade for cutting and grooving processing of steel, non-ferrous materials, plastic materials, etc. . The problems to be solved by conventional technologies and inventions have been in the past in terms of cutting and grooving (grooving) of non-ferrous materials such as steel and titanium, plastic materials, etc. A circular saw (metalworking saw) having a blade portion 22 formed on the outer periphery of the circular plate 21 was used. The metalworking saw is installed on a circular saw disk, etc. * High-speed rotation is used to process the material being cut, and the cutting amount of each edge is small. However, because it has a large number of cutting edges, it can effectively perform cutting and grooving. FIG. 4 shows the shape of the blade portion 22 of the conventional metalworking saw. The cutting edge portion 2 2 is a cutting edge 23 for cutting from a workpiece; has a negative bevel (-/ Θ °) * the first empty cutting edge surface 26 for introducing cutting chips into the bevel 25 for the bottom 24 and having an empty cutting edge) M and the opposing first empty cutting surface 26, and the second empty cutting surface 27 intersecting at an obtuse angle. The inclined surface 25 faces the blade bottom 24 into a gently inclined arc-shaped or straight surface. Also, a chip cavity 28 is formed by the second empty cutting surface 27 of the cutting portion 22 adjacent to the inclined surface 25. Since the above-mentioned metalworking saw has a negative bevel angle, it is possible to form a wide width change at the base end of the blade portion 22, and the strength and rigidity of the blade portion 22 are extremely high. Since the large chip pockets 28 can be formed, the chips generated when the M blade portion 22 cuts the workpiece is appropriately discharged to the outside. In general, in the case of cutting and groove processing using a metalworking saw, in order to improve the machinability, it is necessary to increase the bevel angle of the inclined surface 25 as much as possible, and increase the chip pocket 28. However, although the shape of the cutting edge 22 in Figure 4 is enlarged to increase the chip recess, the scalar scale applies to China National Standard (CNS) A4 (210 X 297 mm) —4 — --------- t (Please Read the notes on the back before filling this page) Order --------- Online-Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 _B7_ V. Description of the invention (2) (Please read the notes on the back first Fill in this page again) Acupoint 28, but because the bevel angle of the bevel 25 is negative, the cuttability is extremely poor, and it is actually not very practical. Therefore, in order to improve the shape of the cutting edge portion, a metalworking saw having the cutting edge portion 31 as shown in FIG. 5 is used. This blade portion 31 is composed of a cutting edge 32; an inclined surface having a positive oblique angle (+ a); a first empty edge surface 34 having an empty edge angle (γ · °); Μ and an opposite first empty edge surface 34, which intersect at an obtuse angle The second empty blade surface 35 is formed. In the case where the metalworking saw is used to cut the initial cutting material, it is preferable that the cutting edge 31 has a positive machinability with an inclined angle of the inclined surface 33. The cutting chips are guided to the cutting edge 36 along the inclined surface 3 3 and are discharged to the outside by centrifugal force. However, because the shape of such a blade portion 31 is positive, as compared with the metalworking saw shown in FIG. 4, the width of the base end of the blade portion 31 is narrower, and the strength and rigidity of the blade portion 31 are smaller. The blade portion 31 is lowered and easily damaged. And because the width of the base end of the blade portion 31 is wide, if the bevel angle of the bevel 33 is small *, the machinability will be deteriorated at this time *, or the edge of the structure will easily appear, which will cause the damage of the edge. Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. When cutting the material to be cut, chips will remain in the chip pockets 3 7. The chip discharge will become worse and chip congestion will easily occur. Therefore, the roughness of the machined surface to be cut may be poor, and problems such as burrs and burrs are likely to occur near the cut portion and groove portion after processing. The present invention has been made in view of the above problems, and an object of the present invention is to provide a circular saw blade that does not impair the strength, rigidity, machinability, and chip discharge of the cutting edge. Means for solving the problem The device for solving the problem of the present invention is to form a blade portion on the outer peripheral portion of the circular plate, and the inclined surface of the blade portion is formed by a first inclined surface having a positive oblique angle; The second bevel of the oblique angle; K and the smoothing connection of the two bevels are in accordance with the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -5-A7 _B7__ V. Description of the invention (3) \ Connection surface composition . (Please read the note on the back. Please fill in this page first.) According to the above structure, once the circular saw rotates, the material being cut is cut by the cutting edge, and the chip hits the connection surface K and the first with a negative bevel. 2 bevels, cut into smaller sections. Therefore, the chips will not cause congestion in the chip pockets and can be properly discharged to the outside. * If the second inclined surface is formed wider than the first inclined surface, the width of the base end of the cutting edge portion can be widened. Therefore, even if the inclined angle of the first inclined surface is increased, the strength, rigidity, and machinability of the cutting edge portion can be improved. Embodiments of the Invention Embodiments of the present invention will be described in detail below with reference to the drawings. Fig. 1 is a view showing a shape of a blade portion of a circular saw blade used as a metalworking saw according to an embodiment of the present invention. This metalworking saw is mounted on a hob saw disk, etc., and rotates at a high speed. It is used for cutting and adding steel to steel. It consists of a circular plate 1M and a blade portion 2 formed on its outer periphery. The blade portion 2 is composed of a cutting edge 3 for cutting a material to be cut, an inclined surface 5 for introducing cutting chips into the cutting edge 4, and an empty cutting surface 6. The cutting edge 3 is formed to protrude in the rotation direction. The inclined surface 5 is formed by the first inclined surface 7 with a positive inclined angle (+ α °); compared with the first inclined surface, the printed surface 7 of the employee consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is formed on the center side, and has a negative inclined angle (-/ 3 ^ ) And the second inclined surface 8; K and the connecting surface 9 which smoothly connects the two inclined surfaces 7,8. The connecting surface 9 has a curved shape in order to avoid stress concentration of a load applied when the material to be cut is cut, and specifically, it forms an arc shape. In addition, the connection surface 9 is not limited to this, and is formed in a polygonal shape, and may also be in a smooth state under giant vision. According to Fig. 1, although the first inclined surface 7 and the second inclined surface 8 are formed in a flat shape, they may be formed in a curved shape or a wave shape. The empty cutting surface 6 is composed of the first empty cutting surface 10 KK with the empty cutting angle (r °) and the opposite first paper size. The Chinese National Standard (CNS) A4 specification (210 X 297 mm) is applicable. -6-A7 _B7_ 5 Explanation of the invention (4) The hollow blade surface 10 is constituted by a second hollow blade surface 11 at an obtuse angle. The second empty cutting edge surface 11 is connected to the second inclined surface 8 of the adjacent cutting edge portion 2 via the cutting edge 4 and the cutting edge 4 is formed in a curved shape. Since the second inclined surface 8 has a larger area than the first inclined surface 7 and the second inclined surface has a negative inclined angle, the width of the base end of the blade portion 2 can be widened, and the strength and rigidity of the blade portion 2 are sufficiently ensured. The space between the upper part and the adjacent blade part 2 can be sufficiently enlarged into a so-called chip pocket ί2. Therefore, when cutting the material to be cut, chip congestion in the chip pockets 12 can be significantly reduced. As a result, occurrence of burrs and burrs in the vicinity of the cutting portion of the material to be cut can be suppressed, and the product after cutting, especially the quality of the machined surface can be improved. Next, the cutting operation of the metalworking saw will be described. As shown in FIG. 2, if the high-speed rotary metalworking saw * Μ cutting edge 3 cuts the material S to be cut, the chips T generated therefrom move along the first inclined surface 7 of the blade portion 2 and connect the connecting surface 9 and the second inclined surface A part of 8 crashed fiercely and was initially cut off. That is, the connecting surface 9 and the second inclined surface 8 have a chip cutting function. In addition, the chip T becomes a relatively small bundle of chips, which is smaller than the chip cut by the conventional blade portion, and is discharged to the outside by centrifugal force. At this time, since the chip pocket 12 becomes large *, the conventional metalworking saw will not be sawn into the chip T holding state as shown in 5_, so the chip T will be smoothly discharged to the outside. Therefore, the discharge of * chips T is better than that of the conventional ones, and the machinability is also improved. Therefore * As described above, since the area of the second inclined surface 8 is larger than that of the first inclined surface 7, the width of the base end of the blade portion 2 is widened, and the strength and rigidity of the blade portion 2 can be sufficiently ensured. This can increase the bevel angle of the first inclined surface 7. That is, since the cutting edge 3 can be sharpened, the machinability can be greatly improved. In addition, this can reduce the cutting resistance and cutting power, and rarely generate cutting heat. As a result, the number of rotations of the metal saw and the cutting feed rate can be set extremely high, which greatly improves productivity. Paper size applies to China National Standard (CNS) A4 (210 X 297 mm) -7-(Please read the precautions on the back before filling this page) tr --------- Intellectual Property Bureau, Ministry of Economic Affairs Printed by employees' consumer cooperatives A7 B7 V. Description of invention (5) (Please read the precautions on the back before filling out this page) Therefore, it is possible to suppress the cutting edge during the processing of difficult-to-cut materials such as titanium and titanium alloys with low thermal conductivity. The temperature rises for stable processing for a long time. And can prolong the life of the cutting edge. For example, in the processing of aluminum materials, the first inclined surface 7 having a large positive bevel and the blade portion 2 having a large chip cavity 12 are necessary, but the shape of the blade portion in this embodiment is most suitable for such aluminum material processing. Its shape. In addition, even when processing plastic materials with high specific heat, low thermal conductivity and high thermal expansion coefficient compared to steel, if the blade portion 2 of this embodiment is used, the roughness of the machined surface can be prevented from being deteriorated, and the cutting portion is insufficient. And discoloration of the working surface. In addition, the present invention is not limited to the above-mentioned embodiments. * Many modifications and changes can be made to the above-mentioned embodiments within the scope of the present invention. For example, the shape of the cutting edge portion of this embodiment can be applied to a circular saw such as a slotted milling cutter and a cold saw. As described above, the bevel angle cc of the first inclined surface 7 can be increased as much as possible. The oblique angle / 5 of the second inclined plane 8 Of course, considering the cutting shearing force, the size of the chip cavity 12 is preferably 45 °, but it is not limited to this angle. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Of composite surface. Effect of the Invention As described above, according to the present invention, by making the inclined surface into a composite surface, the chips generated by cutting with the cutting edge can be thinned by the connecting surface and the inclined surface having a negative bevel, so that the chips can be properly discharged to the outside. Therefore, the occurrence of burrs and burrs in the processed part of the workpiece can be suppressed, and the quality of the product after cutting can be improved. In addition, the second bevel with a negative bevel is applicable to the Chinese standard (CNS) A4 specification (210 X 297 mm) because the paper size of the first bevel with a positive bevel is -8-V. Description of the invention (6 A7 B7 large Therefore, the width of the base end of the cutting edge portion can be increased * to improve the strength and rigidity of the cutting edge portion. In addition, the positive bevel angle of the first inclined surface can be increased to greatly improve the machinability, reduce the actual cutting resistance, and reduce the cutting power. As a result, cutting heat is rarely generated. As a result, since the number of rotations of the circular saw blade and the cutting feed speed can be set to be extremely high, productivity can be greatly improved. Brief description of the drawing FIG. 0 No. 1st element 1 The figure is a view showing the shape of a blade of a metalworking saw according to an embodiment of the present invention. The second view is a view showing the appearance of a metalworking saw during cutting. The third view is a conventional metalworking saw. (A) is a side view. (B) is a front view. 4 is a view showing the shape of a blade of a conventional metalworking saw. 5 is a view showing the shape of a blade of a conventional metalworking saw. Number description I .-----------, · ( (Please read the notes on the back before filling out this page.) Printed α Bevel angle of the 1st bevel β Bevel angle of the 2nd bevel 7 Empty cutting edge angle s The material to be cut τ Chips 1 Round plate 2 Cutting edge 3 Cutting edge 4 Cutting edge 5 Bevel 6 Empty cutting surface order ----- ---- The size of the paper is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) 9 A7 B7 V. Description of the invention (7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 7 The first bevel 8 The second Inclined surface 9 Connecting surface 10 First empty cutting surface 11 Second empty cutting surface 12 Chip pocket 21 Circular plate 22 Edge 23 Cutting edge 24 Cutting edge 25 Beveled surface 26 First empty cutting surface 27 Second empty cutting surface 28 Chip pocket 31 cutting edge 32 cutting edge 33 inclined surface 34 first empty cutting surface 35 second empty cutting surface 36 cutting edge 37 chip pocket (please read the precautions on the back before filling this page) Order --------- The paper size of this paper applies the Chinese National Standard (CNS) A4 (210 X 297 mm) 10