201113121 六、發明說明：. 【發明所屬之技術領域】 轉明是有關於-種研磨組合體，特別是指_種適於 搭配砂輪研磨機使用的研磨組合體。 【先前技術】 …-般工件為了達到表面光滑與去除銳利邊角的效果， 通常會依工件材質選用適當的研磨元件進行研磨、拋光盘 倒圓角等作業，其中，砂輪研磨片為一種普遍使用的研磨 几件，使用時是將該砂輪研磨片固定至一電動式或氣動式 研磨工具上，以藉由該研磨工具帶動該砂輪研磨片轉動並 作用於工件上。此種砂輪式研磨作業多用於汽車、造船等 工業上。 雖然電動式與氣動式研磨工具都能達到預定的研磨效 果’但由於電動式研磨工具用電量相對較大，使用上立有 較大的危險性，而容易造成工安問題。此外’電動式研磨 工具的驅動力較強，若操作經驗不足，容易研磨過量，反 而造成工件結構體受到破壞。 有鑑於此，造船業針對其船身的研磨作業，除了要求 船身所有鐵製品皆需要倒圓角處理外，由於船身大部分為 鐵製結構’為避免危險與減少工安問題，也希望其船身的 研磨作業能改採氣動式研磨工具進行。： 參閱圖1與圖2’為現有普遍用於砂輪研磨作業的一砂 輪研磨組合體卜該研磨組合體丄適用於電動工具，並具有 基座1卜及-固定在基座u上的研磨片單元12。該基座 201113121 11具有一沿一軸線I貫穿的安裝孔110，以便於將該砂輪研 磨組合體1安裝到一研磨工具（圖未示）上。 該研磨片單元12具有七十二片圍繞該軸線I組合成輪 圈狀的研磨砂片121，該等研磨砂片121並相配合界定出一 對應該基座11的安裝孔110的開孔120。每一研磨砂片121 是呈矩形或扇形，並各具有一受相鄰的研磨砂片121覆蓋 的重疊區122，及一未被覆蓋而外露的研磨區123。若該研 磨片早元12 ml #為單一壞狀一體的研磨元件，則研磨時不 具有可順應被研磨工件表面的柔軟彈性，反而容易因過度 研磨而損壞工件，及造成研磨元件耗損率大而有增加原料 成本的缺點。 雖然現有的砂輪研磨組合體丨可應用於砂輪研磨作業 ，但實際使用上仍存有下列缺失： -、該研磨月單元12的該等研磨砂片121雖然能藉由 排列成輪狀的方式提供研磨時彈性緩衝的效果，然而此種 配置方式使每一研磨砂片121被覆蓋面積達1/2以上，導致 每-研賴m的有效研磨面積相對較少，使現有研磨 組合體1具有較浪費的缺失。 二、由於每—研磨砂片121被覆蓋面積較多，為了έ 合完成輪狀的總研磨面，相對需要較多的研磨砂m 能組合完成，目前業界的規格是供恭 >201113121 VI. Description of the invention: [Technical field to which the invention pertains] The invention relates to a grinding assembly, in particular to a grinding assembly suitable for use with a grinding wheel grinder. [Prior Art] ...In order to achieve smooth surface and sharp edges, the workpiece is usually selected according to the material of the workpiece for grinding, polishing, and rounding. Among them, the grinding wheel is a common use. The grinding piece is used to fix the grinding wheel of the grinding wheel to an electric or pneumatic grinding tool, so that the grinding wheel of the grinding wheel rotates and acts on the workpiece by the grinding tool. Such grinding wheel grinding operations are mostly used in industries such as automobiles and shipbuilding. Although electric and pneumatic grinding tools can achieve the desired grinding effect, but because the electric grinding tool uses a relatively large amount of electricity, there is a greater risk of using the upper body, which is likely to cause work safety problems. In addition, the electric grinding tool has a strong driving force. If the operating experience is insufficient, it is easy to grind excessively, and the workpiece structure is damaged. In view of this, the shipbuilding industry's grinding operations for its hulls, in addition to requiring all iron products in the hull to be rounded, because the hull is mostly iron structure, in order to avoid danger and reduce safety problems, it is also hoped The grinding operation of the hull can be carried out by using a pneumatic grinding tool. : Referring to FIG. 1 and FIG. 2' is a grinding wheel grinding assembly commonly used for grinding wheel grinding work. The grinding assembly body is suitable for a power tool, and has a base 1 and an abrasive piece fixed on the base u Unit 12. The base 201113121 11 has a mounting hole 110 extending therethrough to facilitate mounting of the grinding wheel assembly 1 to a grinding tool (not shown). The abrasive sheet unit 12 has seventy-two abrasive sanding sheets 121 that are combined into a rim shape around the axis I, and the abrasive sanding sheets 121 cooperate to define a pair of openings 120 that are to be mounted to the mounting holes 110 of the base 11. . Each of the abrasive sand sheets 121 is rectangular or fan-shaped and each has an overlap region 122 covered by an adjacent abrasive sand sheet 121, and an uncovered, exposed abrasive region 123. If the polishing sheet is 12 ml as a single bad integrated abrasive element, it does not have the soft elasticity which can conform to the surface of the workpiece to be polished, but is liable to damage the workpiece due to excessive grinding, and the wear rate of the polishing element is large. There are disadvantages of increasing the cost of raw materials. Although the existing grinding wheel grinding assembly can be applied to the grinding operation of the grinding wheel, there are still the following defects in practical use: - the abrasive sanding sheets 121 of the grinding month unit 12 can be provided by being arranged in a wheel shape. The effect of elastic cushioning during grinding, however, this arrangement is such that each of the abrasive sand sheets 121 is covered by an area of 1/2 or more, resulting in a relatively small effective grinding area per ray m, so that the existing grinding assembly 1 has a comparative The lack of waste. Second, since each of the abrasive sand sheets 121 is covered with a large area, in order to complete the wheel-shaped total polished surface, relatively more abrasive sand m can be combined, and the current industry specifications are for Gong >
八私動式工具使用的砂I 研磨組合體的研磨片單元12需由 人 + 十—片研磨砂片121 i 合，使現有研磨組合體1製造需#彡 '· 較高。 …原料，導致製造成; 201113121 二、由於需要較多片的研磨砂片121才能組合成該研 磨片單元12，使該研磨組合體1總重量相對較大，若運用 在氣動工具上，存有結合力不足的問題。 四、為了組合成輪狀形式，該等研磨砂片121内部交 ^刀相對較多，造成内圈部分凸起而不適於研磨使用， 該等研磨砂片121的内圈部分相對外圈部分是呈緊密交 宜狀態而不具有彈性缓衝的特性，若用於研磨易導致被研The abrasive sheet unit 12 of the sand I grinding assembly used in the eight-pivoting tool needs to be combined with the human + ten-piece abrasive sand sheet 121 i to make the existing grinding assembly 1 require a higher #彡 '·. ...the raw material, which leads to the manufacture; 201113121 2. Since the abrasive sand piece 121 is required to be combined into the polishing piece unit 12, the total weight of the grinding assembly 1 is relatively large, and if it is applied to a pneumatic tool, The problem of insufficient bonding. 4. In order to be combined into a wheel form, the inner surface of the abrasive sanding plate 121 is relatively large, so that the inner ring portion is convex and is not suitable for grinding. The inner ring portion of the abrasive sanding plate 121 is opposite to the outer ring portion. It is in a state of close fitting without elastic buffering. If it is used for grinding, it is easy to be ground.
磨面不平整’所以其彈性緩衝特性只存在未完全粘合而在 研磨過私#相對被研磨面產生彈動的外圈部分，因此，該 研磨片單it 12只有外圈部分可被使用.，造成其實際可供研 磨的總面積大為縮小。 碌寻研 ----"。又®的万式組合 ，該研磨12，每片研磨砂片121不管是其内圈部分 ’外圈邛分皆呈—傾斜角度結合於該基座^，導致該 磨^⑵相較無法與該基座u形成緊密結合，使該砂輪 研磨組^ 1的研磨砂片121可能在高轉速的研磨過程中 脫:甚至飛出而危及操作者的安全，使該研磨組合體i具 有谷易引發工安問題的缺失。 八 【發明内容】 . ’、 裡卜』银週用於砂Μ =業，並能提供彈性缓衝的功能及增加研 使用率，以達到省料與減輕整體重量效果的研磨組合體。 於疋，本發明研磨組合體包含一基讯 基片的研磨片單元。 。又置在該 201113121 該研磨片單元是覆設在該基片一上表面，包括多數個 圍繞一通過該基片中心的轴線相組接的研磨片，每一研磨 片各具有一鄰近該軸線的内徑片體，及一自該内徑片體向 外擴張延伸的外徑片體，該等研磨片的内徑片體是呈 疊地相併接，及該等外徑片體是呈局部交疊地相接合。 本發明研磨組合體的有益效果在於：藉由該研磨片單 元的研磨片的設計形式，使其相組合形成的研磨片單元的 内圈部分組合形成平整的研磨面並能供研磨使用，外圈部 分則透過局部交疊的接合設計在研磨時提供彈性緩衝的效 果，藉由該研磨片的設計形式，使每一研磨片的有效研磨 面積增加而能減少完成組合所需的研磨片用量，使本發明 具有能有效提升整體研磨面積、省料與減輕重量的特性。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之數個較佳實施例的詳細說明中，將可 清楚的呈現》 在本發明被詳細描述之前，要注意的是，以下的說明 内容中，類似的元件是以相同的編號來表示。 參閱圖3、圖4與圖5,本發明研磨組合體2的一第一 較佳實施例適於安裝至一研磨機（圖未示），包含一基片3, 及—設置在該基片3的研磨片單元4。 該研磨片單元4是覆設在該基片3 一上表面31，且其 外周緣是大於該基片3的外周緣，並包括多數個圍繞一通 過》亥基片3中心的軸線η相組接的研磨片4丄。 201113121 每一研磨片41各具有一鄰近該軸線η的内徑片體411 、一自該内徑片體411向外擴張延伸的外徑片體412，及一 由該内徑片體411與該外徑片體412所界定形成的缺口 413 。該等研磨片41於組合成該研磨片單元4時，其内徑片體 411是呈不交疊地相併接，及其外徑片體412是呈局部交疊 地相接合β 該缺口 413疋由相彎折連接的該内徑片體411 一徑向延 伸的第一侧邊414 ’及該外徑片體412的一内緣邊415所界 疋形成。其中’該内控片體411的第一側邊414與該外徑片 體412的内緣邊415之間的爽角不應受限，但較佳大於9〇 度’在本實施例中’是採用該内徑片體411的第一側邊414 與該外徑#體412的内緣邊415之間的夾角0 i是大於等於 100度的設計。 此外，S玄内徑片體411還具有一與該第一側邊4丨4相間 隔且不相平行而徑向延伸的第一延伸邊段416，及該外徑片 體412還具有一與該第一延伸邊段416呈直線連接的第二 延伸邊段417。由於該内徑片體411的第一側邊414與第一 延伸邊段416為不相平行設置，配合該等研磨片4丨的内徑 片體411呈不交疊地併接，即每一研磨片‘I.之内徑片體 411的第一側邊414是與相鄰研磨片41的内徑片體411的. 第一延伸邊段416相緊密靠合的配置方式，而能藉由每一 研磨片41的第一側邊414與該第一延伸邊段416之間的夾 角角度0 2 ’決疋圍繞形成該研磨片單元4所需的研磨片4 i 數里。例如，當該第—側邊4丨4與該第一延伸邊段4丨6之 201113121 間的夾角角度為15度時，因圍燒— 囷几圈的角度為360度 ’可預估排列形成該研磨片單元4所需的研磨片數量為Μ 片。該第-錢414與該第—延伸邊段416之間的灸角角 度可依實際應用與設計需求調整，其夾角角度範圍不受限 在該第-實施财，該研磨片單元4的每一研磨片41 的内徑片體411是概呈梯形，並還具有—鄰近該轴線π且 連接在該第一側邊414與該第一延伸邊段416之間的内端 邊418，該等研磨片41的内端邊418並圍繞該軸線η相配 合界定出一轴孔419。 其中’該等研磨片的型式不應受限，可以為砂紙， 也可以為具有一基材層4〇1、一塗布在該基材層4〇1上的黏 劑層402，及由多數個結合在該黏劑層4〇2上的研磨顆粒所 形成之研磨層403所界定出的研磨結構體，該等研磨顆粒 包含金鋼砂。此外’該等研磨片41各具有一研磨面421， 及一與該研磨面421反向且用於結合至該基片3的接合面 422，該接合面422具有一由該内徑片體411，及與該内徑 片體411相鄰接的外徑片體412的局部區域所形成的黏結區 423，該研磨片單元4的該等研磨片41是以塗布在該黏結 區423的黏膠5相組接並固定至該基片3。藉由該等研磨片 41的外徑片體412的末端部分因相交疊配置，與未被黏膠 完全固定而呈稍微翹起的狀態，能在研磨時提供順應工件 的被研磨表面微調其接觸作用力的彈性緩衝作用。該等研 磨片41的内控片體411則藉由相併接的方式使該研磨片單. 201113121 元4的内圈部分形成平整的研磨表面。 、=中’該基片3可μ沒有㈣穿孔的板狀基材型式 並精由在該基>| 3與該研磨機之間設置公母扣的黏扣方 式’或利用膠水黏合的方式，使該研磨組合體2結合至該 研磨機（特別是氣動式研磨機）。值得說 也可以形成—對齊該軸孔419的安裝孔心 參閱圖6 ’為本發明研磨組合體2 -第二較佳實施例， ㈣二較佳實施例㈣第—較佳實施例的差別僅在於該等The grinding surface is not flat' so its elastic cushioning characteristic only has the outer ring portion which is not completely bonded and which is elastically ground relative to the surface to be polished. Therefore, only the outer ring portion of the polishing sheet single it 12 can be used. The total area available for grinding is greatly reduced. Looking for research ----". In addition to the versatile combination, the grinding 12, each of the abrasive sanding sheets 121, regardless of the inner ring portion of the outer ring portion, is formed at an oblique angle to the pedestal ^, resulting in the grinding (2) being relatively incompetent The pedestal u forms a tight bond, so that the abrasive sanding plate 121 of the grinding wheel grinding group 1 may be detached during the high-speed grinding process: even flying out to endanger the safety of the operator, so that the grinding assembly i has a valley easy to initiate The lack of security issues. Eight [Summary of the Invention] ‘, 里布』Silver Week is used in the sand Μ = industry, and can provide the function of elastic cushioning and increase the research rate to achieve the grinding and the overall weight effect of the grinding assembly. In the present invention, the abrasive assembly of the present invention comprises an abrasive sheet unit of a substrate. . Further disposed in the 201113121, the abrasive sheet unit is disposed on an upper surface of the substrate, and includes a plurality of abrasive sheets assembled around an axis passing through the center of the substrate, each of the abrasive sheets each having an adjacent axis An inner diameter sheet body and an outer diameter sheet extending outward from the inner diameter sheet body, the inner diameter sheets of the abrasive sheets are connected in a stacking manner, and the outer diameter sheets are Partially joined to each other. The abrasive assembly of the present invention has the beneficial effects that the inner ring portions of the abrasive sheet units formed by combining the polishing sheets of the polishing sheet unit are combined to form a flat abrasive surface and can be used for grinding, the outer ring The part provides a flexible cushioning effect during grinding through the partially overlapping joint design, and the effective grinding area of each abrasive sheet is increased by the design form of the abrasive sheet, thereby reducing the amount of the abrasive sheet required to complete the combination. The invention has the characteristics of effectively improving the overall grinding area, saving materials and reducing weight. The foregoing and other technical aspects, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention. It is to be noted that in the following description, like elements are denoted by the same reference numerals. Referring to Figures 3, 4 and 5, a first preferred embodiment of the abrasive assembly 2 of the present invention is adapted to be mounted to a grinder (not shown), including a substrate 3, and - disposed on the substrate 3 abrasive sheet unit 4. The polishing sheet unit 4 is disposed on an upper surface 31 of the substrate 3, and has an outer circumference larger than an outer circumference of the substrate 3, and includes a plurality of η phase groups surrounding a center of the substrate 3 The attached abrasive sheet 4丄. Each of the polishing sheets 41 has an inner diameter sheet body 411 adjacent to the axis η, an outer diameter sheet body 412 extending outward from the inner diameter sheet body 411, and an inner diameter sheet body 411 and the inner diameter sheet body 411. The outer diameter sheet 412 defines a notch 413 formed. When the polishing sheets 41 are combined into the polishing sheet unit 4, the inner diameter sheets 411 are connected in a non-overlapping manner, and the outer diameter sheets 412 are partially overlapped to each other. The first inner side 414' of the inner diameter piece 411 which is connected by the bending is formed by a radially extending first side 414' and an inner edge 415 of the outer diameter piece 412. The angle between the first side 414 of the inner control piece 411 and the inner edge 415 of the outer diameter piece 412 should not be limited, but is preferably greater than 9 degrees 'in this embodiment' The angle 0 i between the first side 414 of the inner diameter sheet 411 and the inner edge 415 of the outer diameter # body 412 is a design of 100 degrees or more. In addition, the S-shaped inner diameter sheet body 411 further has a first extended side section 416 spaced apart from the first side edge 4丨4 and not extending in parallel, and the outer diameter sheet body 412 further has a The first extended edge section 416 is a second extended edge section 417 that is connected in a straight line. Since the first side 414 of the inner diameter sheet 411 is not disposed in parallel with the first extended side section 416, the inner diameter sheets 411 matching the abrasive sheets 4丨 are connected in a non-overlapping manner, that is, each The first side 414 of the inner diameter sheet 411 of the abrasive sheet 'I. is a configuration that closely abuts the first extended side section 416 of the inner diameter sheet 411 of the adjacent abrasive sheet 41, and can be The angle of angle 0 2 ' between the first side 414 of each abrasive sheet 41 and the first extended side section 416 is determined by the number of abrasive sheets 4 i required to form the abrasive sheet unit 4. For example, when the angle between the first side 4丨4 and the first extended side section 4丨6 of 201113121 is 15 degrees, the angle of the peri- 囷 囷 为 为 360 360 360 360 360 360 360 360 360 360 360 360 360 360 360 360 360 360 360 360 The number of abrasive sheets required for the abrasive sheet unit 4 is a crepe sheet. The angle of the moxibustion angle between the first money 414 and the first extended edge section 416 can be adjusted according to practical application and design requirements, and the angle range of the angle is not limited to the first implementation cost, and each of the abrasive sheet units 4 The inner diameter sheet 411 of the abrasive sheet 41 is substantially trapezoidal and has an inner end edge 418 adjacent to the axis π and connected between the first side edge 414 and the first extension side section 416. An inner end edge 418 of the abrasive sheet 41 and a shaft hole 419 are defined to fit around the axis η. Wherein, the type of the abrasive sheet should not be limited, and may be sandpaper, or may have an adhesive layer 402 having a substrate layer 4, a coating on the substrate layer 4〇1, and a plurality of The abrasive structure defined by the abrasive layer 403 formed by the abrasive particles on the adhesive layer 4〇2, the abrasive particles comprise gold steel sand. Further, the polishing sheets 41 each have a polishing surface 421, and a bonding surface 422 opposite to the polishing surface 421 for bonding to the substrate 3, the bonding surface 422 having an inner diameter sheet 411 And a bonding region 423 formed by a partial region of the outer diameter sheet 412 adjacent to the inner diameter sheet 411. The abrasive sheets 41 of the polishing sheet unit 4 are adhesives coated on the bonding region 423. Five phases are assembled and fixed to the substrate 3. By the end portions of the outer diameter sheets 412 of the polishing sheets 41 being arranged in an overlapping manner, and being slightly fixed without being fixed by the adhesive, the surface to be polished which is compliant with the workpiece can be finely adjusted during the grinding. The elastic cushioning effect of the force. The inner control piece 411 of the polishing pad 41 is formed by the side-by-side joining method. The inner ring portion of the 201113121 element 4 forms a flat abrasive surface. , = in the 'the substrate 3 can be μ without (four) perforated plate-shaped substrate type and fine by the way of the joint between the base and the grinder to set the male and female snaps ' or use glue to adhere The abrasive assembly 2 is bonded to the mill (especially a pneumatic mill). It is worthwhile to say that the mounting hole for aligning the shaft hole 419 can be referred to FIG. 6 'the grinding assembly 2 of the present invention - the second preferred embodiment, and the difference between the preferred embodiment (four) and the preferred embodiment is only In that
研磨片41的内徑片艚&执 的a又3十略有不同，其餘部分與該 第一較佳實施例相同，故不再贅述。 ” 在本實施例中，該内徑片體411是概呈三角形，並還具 有由該第側邊414與該第一延伸邊段416相交形成的 端點420,該研磨片單元4的該等研磨片41的端點42〇是 匯集在該軸線II上。 歸納上述，本發明研磨組合體2，可獲致下述的功效及 優點’故能達到本發明的目的： -、本發明藉由該研磨片單元4的研磨片41的設計形 式，使每—研磨片41的内徑片體411呈相併接，外徑片體 412則呈相父疊，藉此使相組合而形成的研磨片單元4的内 圈部分較平整並能供研磨使用，外圈部分則透過局部交疊 的接合設計在研磨時提供彈性緩衝的效果，此種研磨片Ο 的形式及由此產生的組合方式，使每一研磨片4"皮遮蓋而 無法使用㈣積相對減少’且相對於傳統研磨# i2i(見圖 )月t*將有研磨面積提*至總面積的3/4，使本發明具有能 201113121 有效提升研磨面積的使用率的優點。 二、由於該等研磨片41的内徑片體411呈相併接接合 ，该等内徑片體411界定形成的内圈部分是呈平整研磨面， 並能供平面研磨使用，藉此，使該研磨片單元4的内圈與 外圈部分，即整個研磨面都能被使用，而具有能增進該研 磨片單元4的使用效益的優點。 三、透過該研磨片單元4的研磨片41的設計形式，能 藉由調整該内徑片體411的第一側邊414與第一延伸邊段 16所形成的夾角角度02因應實際需求增減組合形成該研 磨片單元4所需研磨片41的片數，使本發明具有容易調整 研磨片單元4的組合片數的優點。 ^四、由於該研磨片單元4的研磨片41被覆蓋面積相對 較；，要形成輪狀的總研磨面，相對只需要較少量的研磨 片41就能組合完成，使本發明能有效減少研磨片μ的用 量’進而能降低原料成本。 五 '配合該研磨片41的設計形式，藉由形成該缺口 413將無法用於研磨的部分非研磨區移除，而能減輕研磨片 41的重量，加上相對只需較少片的研磨片41就能完成組合 ’而能顯著減輕該研磨片單元4的重量，進而使該研磨組 口體2的總重㈣輕’使該研磨組合體2與研磨卫具（特別 是氣動式研磨工具）結合時所需承擔的重量減少，而能增加 該研磨組合體2與研磨工具之間的結合力。 /、、由於該等研磨片41的内徑片體4ιι呈相併接，使 該等内徑片體4U能完全平貼在該基片3上，貼合接觸面 10 201113121 積大’故能與該基片3形成緊密而牢固的結合，當進行高 速研磨時，能有效避免該等研磨片41自該基片3脫落的狀 況並減少工安問題，使該研磨組合體2具有使用上較安全 的特性。 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一平面示意圖，說明現有的一研磨組合體的一 研磨片單元的組合方式； 圖2是一剖視示意圖，說明該現有研磨組合體的研磨 片单元與一基座相結合的情形； 圖3是一平面示意圖，說明本發明研磨組合體一第一 較佳實施例； 圖4疋°】視示思圖，說明該第一較佳實施例的一研 磨片單元結合在一基片上的情形； 圖5是一局部示意圖，嘮明 ^ , rn M °兄^该第一較佳實施例的研磨 片單元的二研磨片的組合配置情形；及 圖6是一平面示意圖，兮B日士 ^ ^ 口 5兒明本發明研磨組合體一第二 較佳實施例。 201113121 【主要元件符號說明】 2…… …·研磨組合體 415… •…内緣邊 3…… 基片 416… •…第一延伸邊段 30··... •…安裝孔 417··· …·第二延伸邊段 4…… …·研磨片單元 418… •…内端邊 41····. •…研磨片 419… …·軸孔 401… •…基材層 420… •…端點 402… •…黏劑層 421 ·· —研磨面 403… —研磨層 422 ···. —接合面 411… •…内徑片體 423 ···. ----黏結S 412… •…外徑片體 5 ....... …·黏膠 413 ... •…缺口 II....... …·軸線 414… —弟 侧邊 12The inner diameter of the abrasive sheet 41 is slightly different from that of the third embodiment, and the rest is the same as that of the first preferred embodiment, and therefore will not be described again. In the present embodiment, the inner diameter sheet body 411 is substantially triangular, and further has an end point 420 formed by the intersection of the first side edge 414 and the first extension side section 416, the same of the abrasive sheet unit 4 The end point 42 of the abrasive sheet 41 is collected on the axis II. In summary, the abrasive assembly 2 of the present invention achieves the following effects and advantages, so that the object of the present invention can be achieved: - the present invention The polishing sheet 41 of the polishing sheet unit 4 is designed in such a manner that the inner diameter sheet body 411 of each of the polishing sheets 41 is joined to each other, and the outer diameter sheet body 412 is formed as a father stack, thereby forming the abrasive sheets formed by the combination. The inner ring portion of unit 4 is relatively flat and can be used for grinding, and the outer ring portion provides an elastic cushioning effect during grinding through a partially overlapping joint design, the form of such abrasive sheet and the resulting combination thereof Each abrasive sheet 4"skin is covered and cannot be used (4) the product is relatively reduced' and compared with the conventional grinding #i2i (see figure) month t* will have a grinding area* to 3/4 of the total area, so that the invention has the ability 201113121 The advantage of effectively increasing the utilization rate of the grinding area. The inner diameter sheets 411 of the abrasive sheets 41 are joined in parallel, and the inner ring portions defined by the inner diameter sheets 411 are formed into a flat polished surface and can be used for surface grinding, thereby making the polishing sheets The inner ring and outer ring portions of the unit 4, that is, the entire grinding surface can be used, and have the advantage of improving the use efficiency of the polishing sheet unit 4. 3. The design form of the polishing sheet 41 through the polishing sheet unit 4, By adjusting the angle angle 02 formed by the first side 414 of the inner diameter sheet 411 and the first extended side section 16, the number of pieces of the abrasive sheet 41 required to form the polishing sheet unit 4 can be increased or decreased according to actual needs. The present invention has the advantage that it is easy to adjust the number of combined sheets of the polishing sheet unit 4. ^4. Since the polishing sheet 41 of the polishing sheet unit 4 is relatively covered, it is necessary to form a wheel-shaped total polishing surface. A small amount of the abrasive sheet 41 can be combined, so that the present invention can effectively reduce the amount of the abrasive sheet μ', thereby reducing the cost of the raw material. 5. The design of the abrasive sheet 41 can not be used by forming the notch 413. Part of the grinding The grinding zone is removed, and the weight of the abrasive sheet 41 can be reduced, and the combination of only a few pieces of the abrasive sheet 41 can be completed, and the weight of the abrasive sheet unit 4 can be significantly reduced, thereby making the grinding group mouth body The total weight of the four (four) light 'the weight required to combine the grinding assembly 2 with the grinding aid (especially the pneumatic grinding tool) can increase the bonding force between the grinding assembly 2 and the grinding tool /,, because the inner diameter sheets 4 of the polishing sheets 41 are in phase contact, the inner diameter sheets 4U can be completely flattened on the substrate 3, and the contact surface 10 201113121 is large. It can form a tight and strong bond with the substrate 3, and when high-speed polishing is performed, the condition that the polishing sheets 41 are detached from the substrate 3 can be effectively avoided and the safety problem can be reduced, so that the polishing assembly 2 can be used. Safer features. The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a combination of an abrasive unit of a conventional abrasive assembly; FIG. 2 is a schematic cross-sectional view showing the abrasive unit and a base of the prior art abrasive assembly. Figure 3 is a plan view showing a first preferred embodiment of the abrasive assembly of the present invention; Figure 4 is a schematic view showing an abrasive unit of the first preferred embodiment FIG. 5 is a partial schematic view showing a combined arrangement of two abrasive sheets of the polishing sheet unit of the first preferred embodiment; and FIG. 6 is a plane Schematic, 兮B日士^^口5儿明 The second preferred embodiment of the abrasive assembly of the present invention. 201113121 [Description of main component symbols] 2.........grinding assembly 415...•...inner edge 3...substrate 416...•...first extended edge 30··...•...mounting hole 417··· ...·Second extension side section 4...··Insulation sheet unit 418... •...Inner end edge 41····.•...Abrasion sheet 419...·Axis hole 401...•...Substrate layer 420...•...end Point 402... •...Adhesive layer 421 ···Grinding surface 403...—Polishing layer 422 ···.—Joint surface 411... •...Inner diameter sheet 423 ···. ---- Bonding S 412... •... Outer Diameter Sheet 5 . . . .................................................................................................................................................................................................................................................................................................