M378811 五、新型說明： 【新型所屬之技術領域】 本新型是有關於一種研磨組合體，特別是护— 搭配砂輪研磨機使用的研磨組合體。 9種適於 【先前技術】 對工件進行加工處理時，為了達到工件 除銳利邊角的效果’通常會依工件材質選^先滑與去 件進行研磨、抛光與倒圓角等作業，其中^田的研磨元 一種普遍使用的研磨元件，使用料將該砂片為 電動式或氣動式研磨工具上，以藉由該研磨 ::::片轉動並作用於工件上。此種砂輪： 二^車、造船等工業上。雖然電動式與氣動式研：業 量相對較大，使用St:電動式研磨工具用電 問題。此外，電η危險性’而容易造成工安 不足，容易研磨巧Γ具的驅動力較強，若操作經驗 :易研磨過夏，反而造成工件結構體受到破壞。 "所’造船業針對其w的研磨作業，除了要求 =有鐵製品皆需要倒圓角處理外，由於船身大部分為 研避免危險與減少工安問題，也希望其船身的 作業能改採氣動式研磨工具進行。 〃、 輪研雇Γ圖1與圖2 ’為現有普遍用於砂輪研磨作業的一砂 、、且合體卜該研磨組合體1適用於電動工具，並具有 11具右_VL 口定在基座11上的研磨片單元12。該基座 軸線I貝穿的安裝孔〗丨〇，以便於將該砂輪研 3 磨組合體i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t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— 巧該基座^的安裝孔110的開孔120。每一研磨砂片⑵ 疋王矩形或扇形，並各具有一受相鄰的研磨砂片⑵覆蓋 的重3：區122,及-未被覆蓋而外露的研磨區123。若該研 磨片單7L 12设計為單—環狀—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 研磨而抽坡工件，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1可應用於砂輪研磨 ，但實際使用上仍存有下列缺失： ” 排心、a研磨片^ 12的該等研磨砂片121雖然能藉由 J成輪㈣方式提供研磨_性缓衝的效果，然而此種 —己方式使每一研磨砂片12丨被覆蓋面積達1/2以上，導致 磨砂片121的有效研磨面積相對較少，使現有研磨 ，·且s體1具有較浪費的缺失。 “：、由於每一研磨砂片ΐ2ι被覆蓋面積較多，為了电 ^成輪狀的總研磨面’相對需要較多的研磨砂片⑵ 旎組合完成，目前業界的規格是 讲趨々人 况份疋供電動式工具使用的砂輪 :磨二&體的研磨片單元12需由七十二片研磨砂片⑵电 :高現有研磨組合體1製造需較多原料，導致製造成本 二、由於需要較多片的研磨砂片ΐ2ι才能組合成該研 磨片單元12，使該研磨組合體丨總重量相對較大，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 疊部分相對較多’造成内圈部分凸起而不適於研磨使用， 且該等研磨料121的内圈部分相對外圈部妓呈緊密交 疊狀態而不具有彈性缓衝的特性，若用於研磨易導致被研 磨面不平整，所以其彈性緩衝特性只存在未完全枯合而在 研磨過程能相對被研磨面產生彈動的外圈部分，因此，該 研磨片單元12只有外圈部分可被制，造成其實際可供研 磨的總面積大為縮小。 立、 田狖孩等研磨砂片121是以片片交疊的方式組合 成該研磨片單A 12,每片研磨砂片121不管是其内圈部分 或外圈部分傾斜角度結合於該基座11，導致該等研 磨y'片121相較無法與該基座丨丨形成緊密結合，使該砂輪 研^組合H 1的研磨砂片121可能在高轉速的研磨過程中 脫落甚至飛出而危及操作者的安全，使該研磨組合體1具 有容易引發工安問題的缺失。 【新型内容】 本新型之目的’即在提供一種同樣適用於砂輪 研磨作業’並能提供彈性缓衝的功能及增加研磨面的有效 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’本新型研磨組合體包含一基月，及一設置在該 基片的研磨片單元。 Λ 該研磨片單元是覆設在該基片一上表面，且其外周緣 是大於或等於該基片外 阁& a 耵外周緣，該研磨片單元包括多數個 圍一過該基片中心的軸線相組接的研磨片，每一研磨 二：具有-鄰近該轴線的内徑片體、—自該内徑片體向外 ^乂伸的外徑片體，及一由該内徑片體與該外徑片體所 疋形成的缺口，該缺口是由相彎折連接的該内徑y體一 徑向延伸的第-側邊及該外徑片體的一内緣邊所界定形成 一及等研磨片的内徑片體是呈不交疊地相併接，及該等外 徑片體是呈局部交疊地相接合。M378811 V. New description: [New technical field] The present invention relates to a grinding assembly, in particular to a grinding assembly used in combination with a grinding wheel grinding machine. 9 kinds of suitable for [previous technology] When processing the workpiece, in order to achieve the effect of sharp corners of the workpiece, it is usually selected according to the material of the workpiece, such as grinding, polishing and rounding, etc. Field Abrasive Element A commonly used abrasive element that is used as an electric or pneumatic abrasive tool to rotate and act on the workpiece by the grinding::::. Such a grinding wheel: two cars, shipbuilding and other industries. Although electric and pneumatic research: the volume is relatively large, the use of St: electric grinding tools is used. In addition, the risk of electric η is easy to cause insufficient work safety, and the driving force of the easy-to-grind cookware is strong. If the operation experience is easy to grind through the summer, the workpiece structure is damaged. "The shipbuilding industry's grinding operations for its w, in addition to the requirements = iron products need to be rounded, because the hull is mostly to avoid danger and reduce safety and safety, it is also hoped that its hull operation can Change to a pneumatic grinding tool. 〃, 轮 Γ Γ Figure 1 and Figure 2 'is a sand commonly used in grinding wheel grinding operations, and fits the grinding assembly 1 for power tools, and has 11 right _ VL mouth fixed on the base Abrasive sheet unit 12 on 11. The mounting axis of the base axis I is bored to facilitate mounting the grinding wheel assembly i to an abrasive tool (not shown). The abrasive sheet unit 12 has seventy-two pieces of abrasive sand sheets 121 that are combined into a rim shape around the axis t, and the abrasive sand sheets 121 are cooperatively defined to define the opening 120 of the mounting hole 110 of the base ^ . Each of the abrasive sand sheets (2) has a rectangular or fan shape and each has a weight 3: region 122 covered by an adjacent abrasive sand sheet (2), and an exposed portion 123 that is not covered. If the polishing sheet 7L 12 is designed as a single-ring-shaped polishing element, it does not have the soft elasticity that can conform to the surface of the workpiece to be polished, and is easy to be used for excessively grinding the workpiece and causing wear of the polishing element. The rate is large and there is a disadvantage of increasing the cost of raw materials. Although the existing grinding wheel grinding assembly 1 can be applied to grinding wheel grinding, there are still the following defects in practical use: "The grinding sand pieces 121 of the centering, a-polishing piece ^ 12 can be provided by the J-round (four) method. Grinding _ sexual buffering effect, however, this method has made each abrasive sand sheet 12 丨 covered area of more than 1/2, resulting in a relatively small effective grinding area of the sanding sheet 121, so that the existing grinding, and s Body 1 has a wasteful loss. ": Because each grinding sand ΐ2ι is covered with a large area, in order to electrically form a wheel-shaped total grinding surface, it requires relatively more abrasive sanding (2) 旎 combination, the current industry The specification is to say that the grinding wheel used in the power-driven tool: the grinding and polishing unit 12 of the grinding machine 2 needs to be made up of seventy-two pieces of abrasive sand (2): the existing grinding assembly 1 is more expensive to manufacture. The raw material leads to the manufacturing cost. 2. Since a large number of abrasive sanding sheets ΐ2 can be combined to form the polishing sheet unit 12, the total weight of the grinding assembly is relatively large, and if used on a pneumatic tool, there is insufficient bonding force. The problem. 4. In order to be combined into a wheel form, the interior of the abrasive sanding sheet 121 has a relatively large overlap portion, causing the inner ring portion to be convex and not suitable for grinding, and the inner ring portion of the abrasive material 121 is opposite to the outer ring portion. The characteristics of being in a state of close overlap without elastic buffering. If the grinding is used to cause unevenness of the surface to be polished, the elastic cushioning property is only incompletely dried and can be bounced relative to the surface to be polished during the grinding process. The outer ring portion, therefore, only the outer ring portion of the abrasive sheet unit 12 can be made, resulting in a large reduction in the total area available for grinding. Grinding sand sheets 121 such as Li, Tian Hao, etc. are combined into the polishing sheet sheets A 12 in a manner of overlapping sheets, and each of the grinding sand sheets 121 is bonded to the base regardless of whether the inner ring portion or the outer ring portion is inclined at an angle 11, causing the abrasive y' sheets 121 to be intimately combined with the susceptor, so that the grinding sands 121 of the grinding wheel combination H 1 may fall off or even fly out during the high-speed grinding process, thereby jeopardizing The safety of the operator makes the abrasive assembly 1 susceptible to a lack of safety problems. [New content] The purpose of the novel is to provide a grinding assembly that is equally applicable to the grinding operation of the grinding wheel and provides the function of elastic cushioning and increases the effective utilization rate of the grinding surface to achieve the material saving and the overall weight reduction effect. . The present abrasive assembly comprises a base month and an abrasive sheet unit disposed on the substrate.研磨 the polishing sheet unit is coated on an upper surface of the substrate, and the outer periphery thereof is greater than or equal to the outer circumference of the substrate & a ,, the polishing sheet unit includes a plurality of surrounding the center of the substrate An abrasive sheet of the axial phase, each of which has two: an inner diameter sheet adjacent to the axis, an outer diameter sheet extending outward from the inner diameter sheet, and an inner diameter a notch formed by the body and the outer diameter sheet, the notch being defined by a radially extending first side of the inner diameter y body and a inner edge of the outer diameter sheet The inner diameter sheets forming the one and the equal abrasive sheets are joined in a non-overlapping manner, and the outer diameter sheets are joined in a partially overlapping manner.
本新型的有盈效果在於：藉由該研磨片單元的研磨片 2叹计形式’使其相組合形成的研磨片單元的内圈部分組 _形成平正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，因此本^ 新型能藉由改變研磨片的形式，使每一研磨片的有效研磨 面積增加進而減少完成組合所需的研磨片用量，而具有能 有效提升整體研磨面積、省料與減輕重量的特性。 【實施方式】 -有關本新型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。 在本新型被詳細描述之前，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，本新型研磨組合體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21， 及一設置在該基片21的研磨片單元22» M378811 該研磨片單元22是覆設在該基片21 —上表面211，且 其外周緣是大於該基片21的外周緣，並包括多數個圍繞一 通過該基片21中心的軸線II相組接的研磨片221。 每一研磨片221各具有一鄰近該軸線Π的内徑片體222 、一自該内控片體222向外擴張延伸的外徑片體223，及一 由該内徑片體222與該外徑片體223所界定形成的缺口 224 。該等研磨片221於組合成該研磨片單元22時，其内徑片 體222是呈不交疊地相併接，及其外徑片體223是呈局部 交疊地相接合。 該缺口 224是由相彎折連接的該内徑片體222 一徑向 延伸的第一側邊225，及該外徑片體223的一内緣邊226所 界定形成。其中，該内徑片體222的第一侧邊225與該外 徑片體223的内緣邊226之間的夾角不應受限，但較佳大 於90度，在本貫施例中，是採用該内徑片體的第一側 邊225與該外徑片體223的内緣邊226之間的夾角t是大 於等於100度的設計。 此外，該内徑片體222還具有一與該第一側邊225相 間隔且不相平行而徑向延伸的第一延伸邊段227，及該外徑 片體223還具有—與該第一延伸邊段227呈直線連接的第 一延伸邊奴228。由於該内徑片體222的第一側邊225與第 乙伸邊#又227為不相平行設置，配合該等研磨片221的 内仏片體222呈不交疊地併接，即每—研磨片221之内徑 片體222的第一側彡225是與相鄰研磨# 的内徑片體 222的第一延伸邊段227才目緊密靠合的配置方式，而能藉由 7 母一研磨片221的第—側邊225與該第一延伸邊段227之 1的夾角角度β2’決定圍繞形成該研磨片單元所需的研 磨片221數量。例如，當該第一侧邊225與該第一延伸邊 段227之間的夾角角度02為15度時，因圍繞一圈的角度 為360度，可預估排列形成該研磨月單元22所需的研磨片 數量為24片。該第—側邊225與該第一延伸邊段227之間 的夾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。 在該第一實施例中，該研磨片單元22的每一研磨片 221的内徑片體222是概呈梯形，並還具有一鄰近該軸線工工 且連接在該第-側$ 225與該第一延伸邊段227之間的内 端邊229，該等研磨片221的内端邊229並圍繞該軸線η相 配合界定出一轴孔230。 其中，該等研磨片221的型式不應受限，可以為砂紙 ’也可以為具有一基材層231、-塗布在該基材層231上的 黏劑層232’及由多數個結合在該黏劑層232 ±的研磨顆粒 所形成之研磨層233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221各具有一研磨面241 ，及一與該研磨面241反向且用於結合至該基片21的接合 面242，該接合面242具有一由該内徑片體222，及與該内 徑片體222相鄰接的外徑片體223的局部區域所形成的黏 結區243，該研磨片單元22的該等研磨片221是以塗布在 該黏結區423的黏膠3相組接並固定至該基片21。藉由該 等研磨片221的外徑片體223的末端部分因相交疊^置Υ 與未被黏膠完全固定而5黏 稍微翹起的狀態，能在研磨時提 供順應工件的被研磨砉 微調其接觸作用力的彈性緩衝作 用。該等研磨片221的 彳二片體222則糟由相併接的方式 磨片單兀22的内圈部分形成平整的研磨表面。 :&基片21可以為沒有任何穿孔的板狀基材型式 ’並錯由在該基片21與該研磨機之間設置公母扣的黏扣方 式或利用朦水黏合的方式，使該研磨組合體2結合至該 研磨機（特別是氣動式研磨機）。值得說明的是，該基片21 上也可以形成—對齊該軸孔230的安裝孔21〇。 々參閱圖6，為本新型研磨組合體2 -第二較佳實施例， 該第二較佳實施例與該第—較佳實施例的㈣僅在於該等 研磨片如的内徑片體如的設計略有不同，其餘部分與 3亥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222是概呈三角形，並還 具有-由該第225與該第—延伸邊段⑵相交形成 的端點234 ’該研磨片單元22的該等研磨片22工的端點 234是匯集在該軸線η上。 歸納上述，本新型研磨組合體2，可獲致下述的功效及 優點’故能達到本新型的目的： 一、本新型藉由該研磨片單元22的研磨片221的設計 形式，使每一研磨片221的内徑片體222呈相併接，外徑 片體223則呈相父疊，藉此使相組合而形成的研磨片單元 22的内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 M378811 片221的形式及由此產生的組合方式，使每一研磨片22! 被遮蓋而無法使用的面積相對減少，且相對於傳統研磨片 121(見圖1)能將有效研磨面積提高至總面積的3/4,使本新 型具有能有效提升研磨面積的使用率的優點。 二、由於該等研磨片221的内徑片體222呈相併接接 合，該等内徑片體222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22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22的使用效益的優點。 三、透過該研磨片單元22的研磨片221的設計形式， 能藉由調整該内徑片體222的第-侧邊225與第—延伸邊 段227所形成的爽角角度θ2ϋ應實際需求增減組合形成該 研磨片單元22所需研磨片221的片數，使本新型具有 調整研磨片單元22的組合片數的優點。 …研磨片早元22的研磨片221被覆蓋面積相 =义> ’要形成輪狀的總研磨面，相對只需要較 磨片曰221就能組合完成，使本新型能有效減少研磨片: 的用量，進而能降低原料成本。 224將無法用於研磨 3㈣該缺 ㈣重量，加上相對只需較:磨 合，而能顯著減輕該研磨片單元22 旦， t•凡成 組合體2的總重量減輕，使該研磨組合二：::該: 別疋氣動式研磨工具)結合時所需承擔的重量減少磨= 10 M378811 加該研磨組合體2與研磨工具之間的結合力。 六 '由於該等研磨片221的内徑片體222呈相併接， 使該等内徑片體222能完全平貼在該基片21上，貼合接觸 面積大，故能與該基片21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221自該基片21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’僅為本新型之較佳實施例而已，當不 能以此限定本新型實施之範圍’即大凡依本新型申請專利 範圍及新型說明内容所作之簡單的等效變化與修飾，皆仍 屬本新型專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一剖視示意圖，說明該現有研磨組合體的研磨 片單元與一基座相結合的情形； 圖2是一平面示意圖，說明現有的一研磨組合體的— 研磨片單元的組合方式； 圖3是一剖視示意圖，說明本新型研磨組合體一第— 較佳實施例的一研磨片單元結合在一基片上的情形； 。。圖4是一平面示意圖，說明該第一較佳實施例的研磨 片單元由多數個研磨片組合形成的情形； 。。圖5是一局部示意圖，說明該第—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，說明本新型研磨組合體一第二 較佳實施例》 11 M378811 【主要元件符號說明】 2 ...... …·研磨組合體 229… •…內端邊 21·.... …·基片 230… —轴孔 210… •…安裝孔 231… •…基材層 22···· •…研磨片單元 232… •…黏劑層 221… •…研磨片 233… —研磨層 222… •…内徑片體 234 ··· …·端點 223… •…外徑片體 241 ··· —研磨面 224 ·· •…缺口 242 ·... —接合面 225… •…第一側邊 243 ··.. 黏結£ 226 ···. •…内緣邊 3 ....... …黏膠 227 ··· —苐 延伸邊段 II....... …軸線 228 ···· •…第二延伸邊段 12The profit effect of the present invention is that the inner ring portion of the polishing sheet unit formed by the combination of the abrasive sheet 2 of the polishing sheet unit is formed into 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. Therefore, the present invention can reduce the effective grinding area of each abrasive sheet by changing the form of the abrasive sheet, thereby reducing the number of abrasive sheets required for the combination. The dosage has the characteristics of effectively improving the overall grinding area, saving materials and reducing weight. [Embodiment] The foregoing and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Before the present invention is described in detail, it is to be noted that the same elements in the following description are denoted by the same reference numerals. Referring to Figures 3, 4 and 5, a first preferred embodiment of the present abrasive assembly 2 is adapted for mounting to a grinder (not shown), including a substrate 21, and a substrate disposed thereon. The abrasive sheet unit 22 of the 21 is M378811. The abrasive sheet unit 22 is coated on the upper surface 211 of the substrate 21, and has an outer circumference larger than the outer circumference of the substrate 21, and includes a plurality of surrounding one through the substrate. An abrasive sheet 221 in which the axis II of the center is assembled. Each of the polishing sheets 221 has an inner diameter sheet 222 adjacent to the axis 、, an outer diameter sheet 223 extending outward from the inner control sheet 222, and an inner diameter sheet 222 and the outer diameter. The notch 224 is defined by the sheet 223. When the polishing sheets 221 are combined into the polishing sheet unit 22, the inner diameter sheets 222 are joined in a non-overlapping manner, and the outer diameter sheets 223 are joined in a partially overlapping manner. The notch 224 is defined by a radially extending first side 225 of the inner diameter sheet 222 that is bent and joined, and an inner edge 226 of the outer diameter sheet 223. The angle between the first side 225 of the inner diameter sheet 222 and the inner edge 226 of the outer diameter sheet 223 should not be limited, but is preferably greater than 90 degrees. In the present embodiment, The angle t between the first side 225 of the inner diameter sheet and the inner edge 226 of the outer diameter sheet 223 is designed to be 100 degrees or more. In addition, the inner diameter sheet body 222 further has a first extending edge section 227 spaced apart from the first side edge 225 and extending non-parallel, and the outer diameter sheet body 223 further has a first The extended edge section 227 is a first extended edge slave 228 that is connected in a straight line. Since the first side edge 225 of the inner diameter sheet body 222 is not parallel to the second side edge 222, the inner sheet body 222 of the inner surface of the polishing sheet 221 is connected in a non-overlapping manner, that is, each— The first side 彡 225 of the inner diameter sheet 222 of the polishing sheet 221 is disposed in close contact with the first extended side section 227 of the inner diameter sheet 222 of the adjacent grinding 221, and can be configured by 7 The angle β2' of the first side 225 of the abrasive sheet 221 and the first extending edge 227 is determined by the number of abrasive sheets 221 required to form the abrasive sheet unit. For example, when the angle angle 02 between the first side edge 225 and the first extension side section 227 is 15 degrees, since the angle around a circle is 360 degrees, it is estimated that the arrangement of the grinding month unit 22 is required. The number of abrasive sheets is 24 pieces. The angle between the first side 225 and the first extending side 227 can be adjusted according to practical applications and design requirements, and the angle range of the angle is not limited. In the first embodiment, the inner diameter piece 222 of each of the abrasive sheets 221 of the abrasive sheet unit 22 is substantially trapezoidal, and further has a workmanship adjacent to the axis and is connected to the first side 225 and the The inner end edge 229 between the first extended side sections 227, the inner end edges 229 of the abrasive sheets 221 and the shaft θ are fitted to define a shaft hole 230. The type of the polishing sheet 221 is not limited, and may be sandpaper or may have a base layer 231, an adhesive layer 232' coated on the base layer 231, and a plurality of bonded thereto. The abrasive layer 232 ± the abrasive particles formed by the abrasive layer 233 defined by the abrasive structure, the abrasive particles comprise gold steel sand. In addition, the polishing sheets 221 each have a polishing surface 241 and a bonding surface 242 opposite to the polishing surface 241 for bonding to the substrate 21, the bonding surface 242 having an inner diameter sheet 222 And a bonding region 243 formed by a partial region of the outer diameter sheet 223 adjacent to the inner diameter sheet 222. The polishing sheets 221 of the polishing sheet unit 22 are adhesives coated on the bonding region 423. The three phases are assembled and fixed to the substrate 21. By the state in which the end portions of the outer diameter sheets 223 of the polishing sheets 221 are overlapped and not completely adhered by the adhesive, and the sticking is slightly lifted, it is possible to provide a fine adjustment of the workpiece to be ground during grinding. Its elastic cushioning effect of contact force. The two-piece body 222 of the abrasive sheets 221 is formed by abutting the inner ring portions of the single-piece 22 to form a flat abrasive surface. The & substrate 21 may be in the form of a plate-like substrate without any perforations, and is made by a bonding method in which a male and female fasteners are provided between the substrate 21 and the grinding machine or by means of hydrophobic bonding. The abrasive assembly 2 is bonded to the mill (especially a pneumatic mill). It should be noted that the substrate 21 may also be formed with a mounting hole 21 对齐 that is aligned with the shaft hole 230. Referring to Figure 6, there is a second preferred embodiment of the present abrasive assembly 2, and the second preferred embodiment and the fourth preferred embodiment are only in the inner diameter of the abrasive sheet, such as The design is slightly different, and the rest is the same as the first preferred embodiment of 3H, so it will not be described again. In the present embodiment, the inner diameter sheet body 222 is substantially triangular, and further has an end point 234 formed by the intersection of the 225th portion and the first extending edge portion (2). The 22 end points 234 are collected on the axis η. In summary, the novel abrasive assembly 2 can achieve the following effects and advantages, so that the object of the present invention can be achieved: 1. The present invention allows each polishing by the design of the abrasive sheet 221 of the abrasive sheet unit 22. The inner diameter sheet body 222 of the sheet 221 is joined in phase, and the outer diameter sheet body 223 is formed as a father stack, whereby the inner portion of the abrasive sheet unit 22 formed by the combination is relatively flat and can be used for grinding, and the outer ring portion is used. The effect of providing an elastic buffer during the grinding by the partially overlapping joint design, the form of the grinding M378811 sheet 221 and the resulting combination thereof, so that the area of each of the polishing sheets 22! that is covered and unusable is relatively reduced. Moreover, the effective grinding area can be increased to 3/4 of the total area relative to the conventional abrasive sheet 121 (see FIG. 1), so that the present invention has the advantage of effectively increasing the utilization rate of the polishing area. 2. Since the inner diameter sheets 222 of the abrasive sheets 221 are joined in parallel, the inner ring portions defined by the inner diameter sheets 222 are flat polished surfaces and can be used for surface grinding, thereby enabling The inner ring and outer ring portions of the abrasive sheet unit 22, i.e., the entire abrasive surface, can be used, and have the advantage of improving the use efficiency of the abrasive sheet unit 22. 3. Through the design form of the polishing sheet 221 of the polishing sheet unit 22, the refresh angle θ2 formed by adjusting the first side 225 and the first extending side 227 of the inner diameter sheet 222 should be increased in actual demand. The number of sheets of the polishing sheet 221 required to form the polishing sheet unit 22 is reduced, and the present invention has the advantage of adjusting the number of combined sheets of the polishing sheet unit 22. The polishing sheet 221 of the abrasive sheet early element 22 is covered with the area phase = meaning > 'To form a wheel-shaped total polished surface, the polishing sheet 221 can be combined only to complete the grinding sheet, so that the present invention can effectively reduce the abrasive sheet: The amount of use, which in turn can reduce the cost of raw materials. 224 will not be able to be used for grinding 3 (four) the weight of the missing (four), plus relatively only need to: wear-in, but can significantly reduce the total weight of the abrasive sheet unit 22, t•fan into the assembly 2, so that the grinding combination two: ::This: Do not pick up the pneumatic grinding tool) The weight reduction required for the combination of grinding = 10 M378811 Add the bonding force between the grinding assembly 2 and the grinding tool. Since the inner diameter sheets 222 of the polishing sheets 221 are in phase contact, the inner diameter sheets 222 can be completely flattened on the substrate 21, and the bonding contact area is large, so that the substrate can be bonded to the substrate. 21 forms a tight and strong bond, and when high-speed grinding is performed, the condition that the polishing sheets 221 are detached from the substrate 21 can be effectively avoided and the safety problem is reduced, so that the polishing assembly 2 has a safer use property. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the novel patent application scope and the novel description contents are All remain within the scope of this new patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a state in which an abrasive sheet unit of the prior art abrasive assembly is combined with a susceptor; FIG. 2 is a plan view schematically showing a conventional abrasive assembly - grinding Figure 3 is a schematic cross-sectional view showing a state in which an abrasive sheet unit of a preferred embodiment of the present invention is bonded to a substrate; . Figure 4 is a plan view showing the state in which the abrasive sheet unit of the first preferred embodiment is formed by a combination of a plurality of abrasive sheets; . Figure 5 is a partial schematic view showing the combined arrangement of two abrasive sheets of the polishing sheet unit of the first preferred embodiment; and Figure 6 is a plan view showing a second preferred embodiment of the abrasive assembly of the present invention. 11 M378811 [Explanation of main component symbols] 2 ............grinding assembly 229... •...inner end edge 21·....·substrate 230...——shaft hole 210...•...mounting hole 231... •...substrate layer 22····•...abrasive sheet unit 232...•...adhesive layer 221...•...abrasive sheet 233...-abrasive layer 222...•...inner inner sheet 234 ·····end point 223 ... •...outer film body 241 ···—grinding surface 224 ·· •...notch 242 ·... —joining surface 225... •...first side 243 ··.. bonding £ 226 ···. •... Inner edge 3 ..... Viscose 227 ··· —苐 Extended edge section II....... ...axis 228 ····•...second extended edge section 12