TWI464035B - Grinding wheel and fabrication method thereof - Google Patents
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本發明係有關於一種磨輪及其製法，尤指一種具有纖維網狀結構、可顯著降低氣孔率、並提升結構緻密度的磨輪及其製法。The invention relates to a grinding wheel and a manufacturing method thereof, in particular to a grinding wheel having a fiber mesh structure, which can significantly reduce the porosity and increase the density of the structure, and a manufacturing method thereof.
輪磨(wheel grinding)技術在精密表面加工的領域中佔有非常重要的地位，在製造業發達的國家，輪磨技術通常廣泛地被應用在模具、工具零件及電子產品等的生產上。Wheel grinding technology plays a very important role in the field of precision surface machining. In countries with developed manufacturing, wheel grinding technology is widely used in the production of molds, tool parts and electronic products.
所謂輪磨，本質上是屬於切削加工的一種，其係使用磨輪(grinding wheel)(或稱砂輪)當作切削工具，磨輪通常由磨粒(abrasive)與結合劑(bond material)所構成，進行加工時，磨輪快速旋轉並同時與工件(workpiece)接觸，以對工件進行材料移除動作。由於磨輪特殊的構造，使得加工物在輪磨完成之後，比起其他車、銑、刨等之切削加工的結果，有著較高的精密度及較好的表面粗糙度。The so-called wheel grinding is essentially a kind of cutting process. It uses a grinding wheel (or grinding wheel) as a cutting tool. The grinding wheel is usually composed of abrasive and bond material. During processing, the grinding wheel rotates rapidly and simultaneously contacts the workpiece to perform a material removal action on the workpiece. Due to the special structure of the grinding wheel, the workpiece has higher precision and better surface roughness than the cutting process of other cars, milling and planing after the wheel grinding is completed.
磨輪的結合度亦稱為磨輪的硬度，是指磨輪表面的磨粒在外力作用下脫落的難易程度，即磨粒的結合狀況，磨粒的硬度與磨輪的硬度沒有關係，例如磨粒很硬，但是結合度低，磨粒容易從磨輪脫落，磨輪容易破碎，則磨輪硬度偏軟，稱為軟磨輪；而當結合劑對磨粒的把持力越強時，磨粒越不易從磨輪脫落，此種磨輪稱為硬磨輪。因此，磨粒的硬度與磨輪的硬度之間沒有絕對的關係，磨輪的硬度只跟結合劑的種類、結合劑含量多寡以及磨輪內部氣孔含量有關。The degree of bonding of the grinding wheel is also called the hardness of the grinding wheel. It refers to the difficulty of the abrasive grains on the surface of the grinding wheel falling off under the action of external force, that is, the bonding condition of the abrasive grains. The hardness of the abrasive grains has nothing to do with the hardness of the grinding wheel. For example, the abrasive grains are very hard. However, the degree of bonding is low, the abrasive grains are easily detached from the grinding wheel, the grinding wheel is easily broken, and the hardness of the grinding wheel is soft, which is called a soft grinding wheel; and when the bonding agent has a stronger holding force on the abrasive grains, the abrasive grains are less likely to fall off from the grinding wheel. This type of grinding wheel is called a hard grinding wheel. Therefore, there is no absolute relationship between the hardness of the abrasive grains and the hardness of the grinding wheel. The hardness of the grinding wheel is only related to the type of the bonding agent, the amount of the bonding agent, and the content of the pores inside the grinding wheel.
一般在製作磨輪時都會添加填料以改善及增強磨輪的性能，填料的種類琳瑯滿目，金屬或陶瓷等各種材料皆曾經被使用來做為填料，而不同的填料會有不同的作用，有些可用來提升磨輪的耐熱性，有些則是可用來改變磨粒與結合劑的結合狀況。Generally, fillers are added to make and improve the performance of the grinding wheel. The types of fillers are numerous, and various materials such as metal or ceramic have been used as fillers, and different fillers have different functions, and some can be used for lifting. The heat resistance of the grinding wheel, and some can be used to change the bonding of the abrasive particles and the bonding agent.
惟，習知之磨輪仍有硬度不足的問題，導致對磨粒的把持力不足，造成磨粒容易過早脫落，使得磨輪的磨削效果下降。However, the conventional grinding wheel still has a problem of insufficient hardness, resulting in insufficient holding force on the abrasive grains, which causes the abrasive grains to fall off prematurely, and the grinding effect of the grinding wheel is reduced.
因此，如何提出一種在製作上較為簡易、成本較為低廉且功能亦佳的磨輪，以解決上述習知技術中之種種問題，實已成為本領域的技術人員目前亟欲解決的課題。Therefore, how to solve a problem in the above-mentioned prior art by solving a grinding wheel which is relatively simple in production, relatively low in cost, and excellent in function has become a problem that those skilled in the art are currently trying to solve.
有鑒於上述習知技術之缺失，本發明提供一種磨輪，係包括：結合劑；散佈於該結合劑中的複數磨粒；以及交織成網狀的複數奈米填料，其連結該磨粒，且散佈於該結合劑中，以降低氣孔率。In view of the above-mentioned shortcomings of the prior art, the present invention provides a grinding wheel comprising: a bonding agent; a plurality of abrasive particles dispersed in the bonding agent; and a plurality of nano fillers interwoven into a network, which are bonded to the abrasive particles, and Dispersed in the binder to reduce the porosity.
本發明提供一種磨輪之製法，係包括：混合結合劑、複數磨粒與複數奈米填料；進行壓製成型；以及進行燒結，該些奈米填料係散佈於該結合劑中，且交織成網狀，並連結該磨粒，使得燒結時所產生的氣體不易撐開磨粒，進而降低氣孔率。The invention provides a method for manufacturing a grinding wheel, comprising: mixing a binder, a plurality of abrasive grains and a plurality of nano fillers; performing press molding; and performing sintering, wherein the nano fillers are dispersed in the binder and interlaced into a network And joining the abrasive grains, so that the gas generated during sintering is not easy to open the abrasive grains, thereby reducing the porosity.
本發明之磨輪及其製法的氣孔率係最多降低一半。The grinding wheel of the present invention and the method for producing the same have a porosity reduction of at most half.
又於本發明之磨輪及其製法中，該奈米填料係為奈米碳管。In the grinding wheel of the present invention and the method of manufacturing the same, the nano filler is a carbon nanotube.
所述之磨輪及其製法中，該結合劑可為金屬類、陶瓷類、電鑄類或樹脂類之結合劑。In the grinding wheel and the method for manufacturing the same, the bonding agent may be a metal, ceramic, electroform or resin bonding agent.
於本發明之磨輪及其製法中，該磨粒可為氧化鋁系、碳化素系、氧化鋯系、鑽石或立方氮化硼之磨粒。In the grinding wheel of the present invention and the method for producing the same, the abrasive particles may be abrasive grains of alumina, carbon, zirconia, diamond or cubic boron nitride.
依上所述之磨輪及其製法，該磨輪中的結合劑之重量百分比可為7至30%，且該磨輪中的奈米碳管之重量百分比可為1至4%。According to the grinding wheel and the manufacturing method thereof, the weight percentage of the bonding agent in the grinding wheel may be 7 to 30%, and the weight percentage of the carbon nanotubes in the grinding wheel may be 1 to 4%.
又於前述之磨輪及其製法中，該磨輪中的結合劑之重量百分比可為15%，該磨輪中的奈米碳管之重量百分比可為2%，且該磨輪中的磨粒之重量百分比可為83%。In the foregoing grinding wheel and the manufacturing method thereof, the weight percentage of the bonding agent in the grinding wheel may be 15%, the weight percentage of the carbon nanotube in the grinding wheel may be 2%, and the weight percentage of the abrasive grains in the grinding wheel Can be 83%.
由上可知，本發明係於磨輪的粉末混合過程中添加微量奈米碳管，經燒結後，該奈米碳管可在磨輪中形成纖維網狀結構，並發揮纖維強化的作用，因此使得磨粒與磨粒之間、以及磨粒與結合劑之間多了一個固持的媒介與力量，進而可降低磨輪的氣孔率，使磨輪內部結構更為緊實，並增加磨輪的強度；此外，本發明之磨輪僅需依使用需求來調整奈米碳管的添加量，製作步驟相對較簡單，且成本較低。It can be seen from the above that the present invention is to add a trace of carbon nanotubes during the powder mixing process of the grinding wheel. After sintering, the carbon nanotubes can form a fiber network structure in the grinding wheel and play a role of fiber strengthening, thus making the grinding There is a holding medium and force between the particles and the abrasive particles, and between the abrasive particles and the binder, which can reduce the porosity of the grinding wheel, make the internal structure of the grinding wheel more compact, and increase the strength of the grinding wheel; The grinding wheel of the invention only needs to adjust the amount of carbon nanotubes added according to the use requirements, and the manufacturing steps are relatively simple and the cost is low.
以下藉由特定的具體實施例說明本發明之實施方式，熟悉此技藝之人士可由本說明書所揭示之內容輕易地瞭解本發明之其他優點及功效。The other embodiments of the present invention will be readily understood by those skilled in the art from this disclosure.
須知，本說明書所附圖式所繪示之結構、比例、大小等，均僅用以配合說明書所揭示之內容，以供熟悉此技藝之人士之瞭解與閱讀，並非用以限定本發明可實施之限定條件，故不具技術上之實質意義，任何結構之修飾、比例關係之改變或大小之調整，在不影響本發明所能產生之功效及所能達成之目的下，均應仍落在本發明所揭示之技術內容得能涵蓋之範圍內。同時，本說明書中所引用之如「網狀」等之用語，亦僅為便於敘述之明瞭，而非用以限定本發明可實施之範圍，其相對關係之改變或調整，在無實質變更技術內容下，當亦視為本發明可實施之範疇。It is to be understood that the structure, the proportions, the size, and the like of the present invention are intended to be used in conjunction with the disclosure of the specification, and are not intended to limit the invention. The conditions are limited, so it is not technically meaningful. Any modification of the structure, change of the proportional relationship or adjustment of the size should remain in this book without affecting the effects and the objectives that can be achieved by the present invention. The technical content disclosed in the invention can be covered. In the meantime, the terms "network" and the like as used in the specification are merely for convenience of description, and are not intended to limit the scope of the invention, and the relative relationship may be changed or adjusted without substantial change. The content is also considered to be within the scope of the invention.
奈米碳管發現至今已約20年，此種新穎材料具有許多優異的特性，甚至被譽為最強的纖維。然目前並無相關於以奈米碳管做為磨輪製造過程中的填料之研究，故本發明嘗試將奈米碳管使用在磨輪的製造上。The carbon nanotubes have been discovered for about 20 years, and this novel material has many excellent properties and is even known as the strongest fiber. However, there is currently no research on the use of carbon nanotubes as a filler in the manufacturing process of the grinding wheel. Therefore, the present invention attempts to use a carbon nanotube for the manufacture of a grinding wheel.
詳而言之，本發明的磨輪之製法係先以適當比例混合結合劑、複數磨粒與複數奈米碳管；接著，視需要地(optionally)進行壓製成型步驟；最後，進行燒結步驟。In detail, the grinding wheel of the present invention is prepared by mixing a binder, a plurality of abrasive grains and a plurality of carbon nanotubes in an appropriate ratio; then, optionally performing a press molding step; and finally, performing a sintering step.
前述製法所產生之磨輪係包括結合劑、散佈於該結合劑中之複數磨粒、以及複數奈米碳管，係交織成網狀，並包覆該磨粒，且散佈於該結合劑中。The grinding wheel system produced by the above method comprises a bonding agent, a plurality of abrasive grains dispersed in the bonding agent, and a plurality of carbon nanotubes, which are interwoven into a mesh shape, and coated with the abrasive particles, and dispersed in the bonding agent.
依前所述之磨輪及其製法中，該結合劑可為金屬類、陶瓷類、電鑄類或樹脂類之結合劑，且該磨粒可為氧化鋁系、碳化素系、氧化鋯系、鑽石或立方氮化硼之磨粒。In the grinding wheel and the method for manufacturing the same, the bonding agent may be a metal, ceramic, electroforming or resin bonding agent, and the abrasive particles may be alumina, carbon, or zirconia. Abrasive grain of diamond or cubic boron nitride.
為了驗證本發明的功效，因而實際製作出本發明之磨輪，以下將詳述本發明的相關測試、實驗參數與結果。In order to verify the efficacy of the present invention, the grinding wheel of the present invention is actually produced, and the relevant tests, experimental parameters and results of the present invention will be detailed below.
首先，結合劑與磨粒的材質係分別採用酚醛樹脂與金剛砂(主要成分為Al2 O3 (含量約96.5%)，並含有少許的Fe2 O3 與TiO2 等雜質)，且在結合劑、磨粒與奈米碳管三者的比例方面係分為三組比例：樹脂的重量百分比分別為30%、15%與7%，各組中又將奈米碳管的重量百分比分為0%、1%、2%、3%、4%五種，其餘部分則為金剛砂，總計15種不同比例的磨輪試片，詳如下表所示。(樹脂含量超過30%時，磨輪大多在燒結後碎裂，故在此未予以考量)First, the binder and the abrasive are made of phenolic resin and silicon carbide (the main component is Al 2 O 3 (content about 96.5%), and contains a little impurity such as Fe 2 O 3 and TiO 2 ), and the binder The ratio of abrasive grains to carbon nanotubes is divided into three groups: the weight percentage of the resin is 30%, 15% and 7%, respectively, and the weight percentage of the carbon nanotubes is divided into 0 in each group. There are five kinds of %, 1%, 2%, 3%, and 4%, and the rest are emery, and a total of 15 different proportions of grinding wheel test pieces are shown in the following table. (When the resin content exceeds 30%, the grinding wheel is mostly broken after sintering, so it is not considered here)
將上述比例之材料燒結成磨輪試片後，並用掃描式電子顯微鏡(SEM)進行觀察，發現奈米碳管在磨輪試片中總共有三種型態：網狀包覆金剛砂磨粒之型態(如第1A圖所示)、網狀連結樹脂之型態(如第1B圖所示)與形成團簇之型態(如第1C圖所示)。The material of the above ratio was sintered into a grinding wheel test piece, and observed by a scanning electron microscope (SEM). It was found that there were three types of carbon nanotubes in the grinding wheel test piece: the shape of the mesh coated diamond abrasive grain ( As shown in Fig. 1A), the type of the network-connected resin (as shown in Fig. 1B) and the type of cluster formation (as shown in Fig. 1C).
前兩種型態(網狀包覆金剛砂磨粒與網狀連結樹脂之型態)均可在所有本發明之磨輪試片中觀測的到，即奈米碳管會形成網狀結構1(請參照第2B圖)，並連結(例如以包覆、附著或嵌入等方式)各磨粒2與樹脂3，而磨粒2與磨粒2之間即多了一個固持的媒介，隨著奈米碳管含量越多，固持力(或結合力)會越強，因此磨輪在燒結時所產生的氣體在逸散時越不易撐開磨粒2而形成大的氣孔4，因而相較於如第2A圖之習知技術的磨輪結構示意圖，本發明有縮小磨輪中之氣孔4的效用，如第2B圖之本發明的磨輪結構示意圖所示，並因此而使磨輪的組織更為緊密，進而增進整體磨輪結構的硬度。The first two types (the shape of the mesh-coated silicon carbide abrasive grains and the network-connected resin) can be observed in all the grinding wheel test pieces of the present invention, that is, the carbon nanotubes form a network structure 1 (please Referring to FIG. 2B), and joining (for example, coating, attaching or embedding, etc.) each of the abrasive grains 2 and the resin 3, and between the abrasive grains 2 and the abrasive grains 2, there is a holding medium, along with the nanometer. The more the carbon tube content, the stronger the holding force (or bonding force), so the gas generated during the sintering of the grinding wheel is less likely to expand the abrasive grains 2 to form large pores 4 when dissipated, thus 2A is a schematic view of a grinding wheel structure of the prior art, the invention has the effect of reducing the pores 4 in the grinding wheel, as shown in the schematic diagram of the grinding wheel of the invention of FIG. 2B, and thus the grinding wheel is more tightly organized and thus enhanced The hardness of the overall grinding wheel structure.
然而，當磨輪中奈米碳管的含量在多到某個程度之後，便會形成團簇，該團簇如棉球般充填在空隙與氣孔之間，且團簇結構的形成會使磨粒與填料的總體積變得更大，樹脂所佔的體積百分率相對下降，因而樹脂對於磨粒與填料兩者的把持力降低，使得磨輪硬度隨之降低。此種團簇型態在樹脂含量為15%且奈米碳管含量大於3%時，或者，樹脂含量為7%且奈米碳管含量大於2%時，就會產生。However, when the content of the carbon nanotubes in the grinding wheel is increased to some extent, clusters are formed, which are filled like cotton balls between the voids and the pores, and the formation of the cluster structure causes the abrasive grains to be formed. As the total volume of the filler becomes larger, the volume fraction of the resin is relatively decreased, so that the holding force of the resin for both the abrasive grains and the filler is lowered, so that the hardness of the grinding wheel is lowered. Such a cluster pattern is produced when the resin content is 15% and the carbon nanotube content is more than 3%, or the resin content is 7% and the carbon nanotube content is more than 2%.
將前述之15種不同比例的磨輪試片製作完成後，分別進行抗壓強度測試，其結果如第3圖所示，抗壓強度測試雖然非正規測試磨輪的結合度或硬度的方式，但是可以大致了解磨輪的軟硬程度及內部結構強度，因此抗壓強度可做為磨輪硬度的一項參考值。After the above-mentioned 15 different proportions of the grinding wheel test piece are completed, the compressive strength test is respectively performed, and the result is shown in FIG. 3, although the compressive strength test is not a formal test of the degree of bonding or hardness of the grinding wheel, Generally understand the hardness and internal strength of the grinding wheel, so the compressive strength can be used as a reference value for the hardness of the grinding wheel.
由第3圖可知，在添加了奈米碳管後，試片的磨輪抗壓強度開始產生變化，而在不同樹脂含量下，奈米碳管的含量多寡對於試片的抗壓強度有不同的影響。It can be seen from Fig. 3 that after the addition of the carbon nanotubes, the compressive strength of the grinding wheel of the test piece begins to change, and at different resin contents, the content of the carbon nanotubes has different compressive strength to the test piece. influences.
在樹脂含量為30%時，隨著奈米碳管添加的量增加，氣孔的大小變得愈來愈小，試片的內部結構也隨之愈緊密，抗壓強度因而提升。When the resin content is 30%, as the amount of the carbon nanotubes is increased, the size of the pores becomes smaller and smaller, and the internal structure of the test piece becomes tighter, and the compressive strength is thus increased.
在樹脂含量為15%時，含量1%的奈米碳管減小了氣孔，因此抗壓強度得到了提升，然而，奈米碳管粉末與金剛砂粉末兩者的密度相差極大，在相同重量之下，奈米碳管粉末的體積約為金剛砂粉末的19倍，當奈米碳管含量增加時，奈米碳管與金剛砂的總體積會迅速增加，在樹脂含量沒有相對提高的情況下，樹脂對於奈米碳管與金剛砂的黏結力或結合力會開始下降，所以奈米碳管含量在2%以上時，抗壓強度開始下降。When the resin content is 15%, the carbon nanotubes with a content of 1% reduce the pores, so the compressive strength is improved. However, the density of the carbon nanotube powder and the corundum powder differ greatly, at the same weight. The volume of the carbon nanotube powder is about 19 times that of the emery powder. When the content of the carbon nanotubes increases, the total volume of the carbon nanotubes and the corundum increases rapidly. In the case where the resin content is not relatively increased, the resin The adhesion or binding force between the carbon nanotubes and the corundum will begin to decrease. Therefore, when the carbon nanotube content is above 2%, the compressive strength begins to decrease.
至於樹脂含量為7%時，做為結合劑角色的樹脂太少，對於較多量的金剛砂並無法提供足夠的結合力，而奈米碳管含量增加時，奈米碳管與金剛砂的總體積變得更大，造成樹脂對兩者的結合力更為不足，因此抗壓強度趨於下降。As for the resin content of 7%, too little resin acts as a binder, and does not provide sufficient bonding force for a large amount of corundum. When the content of the carbon nanotubes increases, the total volume of the carbon nanotubes and silicon carbide changes. It is even larger, causing the resin to have less binding force to the two, and thus the compressive strength tends to decrease.
接續上述抗壓強度測試之後，進一步分析在樹脂含量為30%時，氣孔率與抗壓強度之關係，如下表所示：After the above-mentioned compressive strength test, the relationship between the porosity and the compressive strength at a resin content of 30% was further analyzed, as shown in the following table:
由上可知，本發明之磨輪能有效降低氣孔率，並因此大幅提升抗壓強度；其中，就奈米碳管之含量為0Wt%與4Wt%來比較，整體氣孔率總共降低成原來的53.5%，即最多可將氣孔率降低一半，同時抗壓強度也隨之提升了29.2倍，所以證明本發明之磨輪可顯著提升整體效能。As can be seen from the above, the grinding wheel of the present invention can effectively reduce the porosity and thus greatly increase the compressive strength; wherein, the content of the carbon nanotubes is 0 Wt% compared with 4 Wt%, and the overall porosity is reduced to 53.5%. That is, the porosity can be reduced by up to half, and the compressive strength is also increased by 29.2 times, so that the grinding wheel of the present invention can significantly improve the overall performance.
磨削為一表面精製的作業，經磨削之工件的表面粗糙度是磨削作業的重要評價數值之一，也是判定磨輪性能的重要參數之一，因此在以前述之15種不同比例的磨輪試片進行磨削之後，對工件表面的粗糙度進行量測，並比較磨削前後的工件的表面粗糙度的變化。Grinding is a surface refining operation. The surface roughness of the ground workpiece is one of the important evaluation values of the grinding operation. It is also one of the important parameters for judging the performance of the grinding wheel. Therefore, the grinding wheel in the above 15 different ratios is used. After the test piece is ground, the roughness of the surface of the workpiece is measured, and the change in the surface roughness of the workpiece before and after the grinding is compared.
表面粗糙度一般有Ra、Rz、Rt、Rq…等不同表示方法，而各個表示方法對粗糙度的計算方式以及定義不盡相同，一般常見的表面粗糙度的表示方法為Ra(中心線平均粗糙度，為CNS所採用，又稱為算術平均粗糙度)，故在此採用Ra來表示工件的表面粗糙度。Surface roughness generally has different representation methods such as Ra, Rz, Rt, Rq, etc., and the calculation method and definition of roughness are different for each representation method. The general surface roughness is expressed by Ra (center line average roughness). Degree, which is used by the CNS, is also called arithmetic mean roughness), so Ra is used here to indicate the surface roughness of the workpiece.
各試片對工件的Ra改善率如第4圖所示；其中，由於樹脂含量為7%且奈米碳管含量為3%、以及樹脂含量為7%且奈米碳管含量為4%這兩個試片因為整體結合度太差，於磨削時試片即粉碎而無法進行磨削試驗。The Ra improvement rate of each test piece to the workpiece is as shown in Fig. 4; wherein, since the resin content is 7% and the carbon nanotube content is 3%, the resin content is 7%, and the carbon nanotube content is 4%. Since the two test pieces were too poor in overall bonding, the test pieces were pulverized during grinding and the grinding test could not be performed.
由第4圖可知，除了樹脂含量為7%的試片之外，其餘樹脂含量為30%及15%的試片在添加奈米碳管之後皆能夠提升磨削能力，增加對工件之Ra的改善率，其中以樹脂含量為15%且奈米碳管為2%的試片的Ra改善率最佳，達到65%。As can be seen from Fig. 4, in addition to the test piece having a resin content of 7%, the test pieces having a resin content of 30% and 15% can improve the grinding ability after adding the carbon nanotubes, and increase the Ra of the workpiece. The improvement rate, in which the resin content was 15% and the carbon nanotubes were 2%, the Ra improvement rate was the best, reaching 65%.
承前所述，磨輪試片的結合度影響其磨削能力甚鉅，若想要對工件有較好的Ra改善率，並使工件達到較好的表面粗糙度，則磨輪試片必須達到一最適當的結合度。結合度過低時，磨粒容易脫落，使得磨削效果下降；而結合度過高時，磨粒不易脫落，則磨輪試片表面容易鈍化並黏屑，同樣會降低磨粒的磨削能力。As mentioned above, the degree of bonding of the grinding wheel test piece affects its grinding ability. If you want to have a good Ra improvement rate on the workpiece and achieve a good surface roughness, the grinding wheel test piece must reach the most The appropriate degree of bonding. When the degree of bonding is too low, the abrasive grains are easily detached, so that the grinding effect is lowered. When the bonding degree is too high, the abrasive grains are not easily detached, and the surface of the grinding wheel test piece is easily passivated and sticky, which also reduces the grinding ability of the abrasive grains.
而由第4圖之實驗結果可看出，由15%的樹脂、83%的金剛砂與2%的奈米碳管所構成的磨輪試片具有較佳的磨削能力。From the experimental results in Fig. 4, it can be seen that the grinding wheel test piece composed of 15% resin, 83% diamond and 2% carbon nanotube has better grinding ability.
要注意的是，本實施方式係以奈米碳管之奈米填料為例，但並不以此為限，即其他種類的奈米填料同樣可以達到本發明的優異功效；此外，本發明之磨輪除了能提升磨輪的強度之外，該奈米碳管之作用同樣也可增進磨輪的韌性，進而於進行磨削之後，工件達到較佳的表面粗糙度。It should be noted that the present embodiment is exemplified by a nano carbon filler of a carbon nanotube, but not limited thereto, that is, other kinds of nano filler can also achieve the excellent effect of the present invention; In addition to improving the strength of the grinding wheel, the effect of the carbon nanotubes also enhances the toughness of the grinding wheel, and the workpiece achieves a better surface roughness after grinding.
綜上所述，相較於習知技術，由於本發明係於磨輪的粉末混合過程中添加微量奈米碳管，該奈米碳管可在磨輪中形成纖維網狀結構，並發揮纖維強化的作用，所以使得磨粒與磨粒之間、以及磨粒與結合劑之間多了一個固持的媒介與力量，進而可縮小最終磨輪中的氣孔，使磨輪內部結構更為緊實，並增加磨輪的強度；再者，相較於習知之磨輪需添加種類繁多的填料，本發明之磨輪僅需依使用需求調整奈米碳管的添加量，製作步驟相對較簡單，且成本較低。此外，實驗結果也證明本發明之磨輪具有顯著提升磨削能力之優異成果。In summary, compared with the prior art, since the present invention is to add a small amount of carbon nanotubes during the powder mixing process of the grinding wheel, the carbon nanotubes can form a fiber network structure in the grinding wheel and play a fiber-reinforced structure. The action, so that there is a holding medium and force between the abrasive particles and the abrasive particles, and between the abrasive particles and the bonding agent, thereby reducing the pores in the final grinding wheel, making the internal structure of the grinding wheel more compact, and increasing the grinding wheel. In addition, compared with the conventional grinding wheel, a variety of fillers need to be added. The grinding wheel of the invention only needs to adjust the amount of carbon nanotubes added according to the use requirements, and the manufacturing process is relatively simple and the cost is low. In addition, the experimental results also prove that the grinding wheel of the present invention has an excellent effect of significantly improving the grinding ability.
上述實施例係用以例示性說明本發明之原理及其功效，而非用於限制本發明。任何熟習此項技藝之人士均可在不違背本發明之精神及範疇下，對上述實施例進行修改。因此本發明之權利保護範圍，應如後述之申請專利範圍所列。The above embodiments are intended to illustrate the principles of the invention and its effects, and are not intended to limit the invention. Any of the above-described embodiments may be modified by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be as set forth in the appended claims.
1．．．網狀結構1. . . grid
2．．．磨粒2. . . Abrasive grain
3．．．樹脂3. . . Resin
4．．．氣孔4. . . Stomata
第1A、1B與1C圖分別係本發明之磨輪中的奈米碳管的三種型態之掃描式電子顯微鏡圖；1A, 1B and 1C are respectively scanning electron micrographs of three types of carbon nanotubes in the grinding wheel of the present invention;
第2A與2B圖分別係習知與本發明之磨輪結構示意圖；2A and 2B are respectively a schematic view of a conventional grinding wheel structure of the present invention;
第3圖係本發明之磨輪的抗壓強度與奈米碳管含量之關係圖；以及Figure 3 is a graph showing the relationship between the compressive strength of the grinding wheel of the present invention and the carbon nanotube content;
第4圖係本發明之磨輪的Ra改善率與奈米碳管含量之關係圖。Fig. 4 is a graph showing the relationship between the Ra improvement rate of the grinding wheel of the present invention and the content of the carbon nanotubes.
1．．．網狀結構1. . . grid
2．．．磨粒2. . . Abrasive grain
3．．．樹脂3. . . Resin
4．．．氣孔4. . . Stomata
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| JP2004050364A (en) * | 2002-07-22 | 2004-02-19 | Nitolex Honsha:Kk | Conductive grinding wheel, manufacturing method therefor and dressing method |
| JP2005246519A (en) * | 2004-03-02 | 2005-09-15 | Noritake Super Abrasive:Kk | Resin bond wheel |
| TW201132453A (en) * | 2010-03-24 | 2011-10-01 | Tian-Yuan Yan | Fiber reinforced resin bonded polishing pad conditioner and manufacturing method thereof |
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| JP2004050364A (en) * | 2002-07-22 | 2004-02-19 | Nitolex Honsha:Kk | Conductive grinding wheel, manufacturing method therefor and dressing method |
| JP2005246519A (en) * | 2004-03-02 | 2005-09-15 | Noritake Super Abrasive:Kk | Resin bond wheel |
| TW201132453A (en) * | 2010-03-24 | 2011-10-01 | Tian-Yuan Yan | Fiber reinforced resin bonded polishing pad conditioner and manufacturing method thereof |
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