JP6682552B2 - 開孔セラミック結合型研削工具、その製造方法、及びこれを製造するために用いられる細孔形成剤混合物 - Google Patents
開孔セラミック結合型研削工具、その製造方法、及びこれを製造するために用いられる細孔形成剤混合物 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/008—Abrasive bodies without external bonding agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
- B24D3/14—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic ceramic, i.e. vitrified bondings
- B24D3/18—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic ceramic, i.e. vitrified bondings for porous or cellular structure
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
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- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/0605—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances by sublimating
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
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- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
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Description
砥粒を、セラミック結合剤、上述した種類の細孔形成剤混合物、及び助剤(例えば、接着剤及び他の添加剤)と混合して混合物を得る工程;
混合物を圧縮して圧粉体とする工程;と
圧粉体を焼成してセラミック結合型研削工具を得る工程
を含む。
表1は、本研究で使用した多数の細孔形成剤をまとめたものである。細孔形成剤の選択された粒径分布は、砥粒の平均直径DKに基づいており、それぞれの細孔形成剤の代表的な係数Fxを用いて計算することができる。例えば、砥粒の直径がDK=200μmで係数FX=2.0±1.0である場合、この定義に従えば、細孔形成剤の粒径分布はFX×DK=(400±200)μmである。ここで「±」の後の数字は質量に対する粒径分布の標準偏差の2倍を示す。換言すれば、当該の細孔形成剤の95質量%が、特定の区間内の粒径を有する。個々の細孔形成剤の粒径分布は単峰性でほぼガウス分布であり、示された位置に顕著な極大を有していた。
試験された全てのディスクについて、表3に示す同じ原料成分が使用され、これは研削試験によって個々の細孔形成剤混合物の直接比較が可能であることを意味し、個々の成分の量はそれぞれの場合で砥粒量(100%)に基づく。
完成した研削ディスクは、以下の表4に記載された特性を有していた。ディスクを試験するために、研削焼けが生じるまでの限界時間切削体積又は相当限界切削厚さheq_thの第一段階と、許容される摩耗限度の超過に関する限界時間切削体積又は相当限界切削厚さheq_vの第二段階において測定を行った。両方の値は、表4のように、比較ディスクに基づく相対値として記録される。
**摩耗限界=要求される摩耗基準内にとどまっている間に使用できる最大達成可能な相当切削厚さheq_v。
Claims (21)
- 20〜80体積%の細孔率を有する開孔セラミック結合型研削工具であって、
前記細孔が50〜2000μmの平均直径を有し、
前記研削工具が少なくとも2つの細孔径極大を有する多峰性の細孔径分布を有し、
前記細孔径分布の前記細孔径極大値のそれぞれが、少なくとも100μm離れている、
前記開孔セラミック結合型研削工具。 - 少なくとも2つの前記細孔径極大が100〜1000μmの範囲にある、請求項1に記載の研削工具。
- 20〜80体積%の細孔率を有する開孔セラミック結合型研削工具であって、
前記細孔が50〜2000μmの平均直径を有し、
前記研削工具が少なくとも2つの細孔径極大を有する多峰性の細孔径分布を有し、
前記研削工具が微小細孔と粗細孔を有する二峰性の細孔径分布を有し、前記微小細孔が100〜400μmの範囲に細孔径極大を形成し、前記粗細孔が350〜1000μmの範囲に細孔径極大を形成する、
前記開孔セラミック結合型研削工具。 - 20〜80体積%の細孔率を有する開孔セラミック結合型研削工具であって、
前記細孔が50〜2000μmの平均直径を有し、
前記研削工具が少なくとも2つの細孔径極大を有する多峰性の細孔径分布を有し、
前記研削工具が微小細孔、中間細孔及び粗細孔を有する三峰性の細孔径分布を有し、前記微小細孔が100〜300μmの範囲に細孔径極大を形成し、前記中間細孔が250〜450μmの範囲に細孔径極大を形成し、前記粗細孔が400〜1000μmの範囲に細孔径極大を形成する、
前記開孔セラミック結合型研削工具。 - 前記細孔径分布の前記細孔径極大値のそれぞれが、少なくとも100μm離れている、請求項3又は4に記載の研削工具。
- 少なくとも2つの異なる細孔形成ポリマーを含む、開孔セラミック結合型研削工具のための細孔形成剤混合物であって、
前記少なくとも2つの細孔形成ポリマーが、異なる焼成曲線を有し、
前記焼成曲線のそれぞれが極大を有し、
少なくとも2つの前記細孔形成ポリマーの前記焼成曲線の前記極大値が、少なくとも20℃異なり、
全ての前記細孔形成ポリマーの前記焼成曲線の前記極大値が、750℃より低い、
細孔形成剤混合物。 - 前記細孔形成ポリマーの燃焼生成物が、二酸化炭素及び水のみを含む、請求項6に記載の細孔形成剤混合物。
- 前記細孔形成剤混合物が、少なくとも3つの異なる細孔形成ポリマーを含む、請求項6又は7に記載の細孔形成剤混合物。
- 前記細孔形成ポリマーが熱可塑性樹脂及び熱硬化性樹脂の群から選択される、請求項6〜8のいずれかに記載の細孔形成剤混合物。
- 前記細孔形成ポリマーが、ポリ乳酸(PLA)、ポリアクリル酸(PMMA)、ポリエチレン(PE)、ポリプロピレン(PP)、ポリケトン(PK)、ポリ酢酸ビニル(PVA)、及びポリビニルブチラール(PVB)からなる群から選択される熱可塑性樹脂である、請求項9に記載の細孔形成剤混合物。
- 前記細孔形成ポリマーの少なくとも1つが熱可塑性樹脂であり、結晶領域を有する、請求項6〜10のいずれかに記載の細孔形成剤混合物。
- 前記細孔形成混合物が、20〜80体積%のポリエチレン、10〜50体積%のポリアクリル酸、及び10〜50体積%のポリ乳酸、ポリ酢酸ビニル又はポリビニルブチラールを含む、請求項6〜11のいずれかに記載の細孔形成剤混合物。
- 個々の前記細孔形成ポリマーが、それぞれ粒径範囲が0.05〜2mmである細孔形成剤画分として存在し、前記細孔形成剤混合物が多峰性の粒径分布を有する、請求項6〜12のいずれかに記載の細孔形成剤混合物。
- 前記多峰性の粒径分布が、100〜1000μmの範囲に少なくとも2つの粒径極大を有する、請求項13に記載の細孔形成剤混合物。
- 前記細孔形成剤混合物が、微小画分及び粗画分を有する二峰性の粒径分布を有し、前記微小画分が100〜400μmの間に平均粒径d50を有し、前記粗画分が350〜1000μmの間に平均粒径d50を有する、請求項13又は14に記載の細孔形成剤混合物。
- 細孔形成剤混合物が、微小画分、中間画分及び粗画分を有する三峰性の粒径分布を有し、前記微細画分が100〜300μmの間に平均粒径d50を有し、前記中間画分が250〜450μmの間に平均粒径d50を有し、前記粗画分が400〜1000μmの間に平均粒径d50を有する、請求項13又は14に記載の細孔形成剤混合物。
- 前記細孔形成剤画分が異なる平均粒径d50を有し、個々の前記細孔形成剤画分の異なる前記平均粒径d50が少なくとも100μm離れていることを特徴とする請求項13〜16のいずれかに記載の細孔形成剤混合物。
- 少なくとも2つの細孔形成ポリマーを含む細孔形成剤混合物を使用して、開孔セラミック結合型研削工具を製造する方法であって、
前記少なくとも2つの異なる細孔形成ポリマーが、異なる焼成曲線を有し、
前記焼成曲線のそれぞれが極大を有し、
少なくとも2つの前記細孔形成ポリマーの前記焼成曲線の前記極大値が少なくとも20℃異なり、
全ての前記細孔形成ポリマーの前記焼成曲線の前記極大値が750℃より低い、
前記方法。 - 前記細孔形成剤混合物が、研削工具を製造するための圧縮コンパウンドに直接添加される、請求項18に記載の方法。
- 前記細孔形成剤混合物を少なくとも1種の接着剤と組み合わせて圧縮コンパウンドに添加する、請求項18又は19に記載の方法。
- 前記接着剤が、前記細孔形成ポリマーの前記焼成曲線の前記極大値よりも高い焼成温度を有する、請求項20に記載の方法。
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PCT/EP2016/054546 WO2016155971A1 (de) | 2015-04-01 | 2016-03-03 | Offenporige, keramisch gebundene schleifwerkzeuge, verfahren zu ihrer herstellung sowie für ihre herstellung verwendete porenbildnermischungen |
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