| 摘要 |
FIELD: metal working. ^ SUBSTANCE: abrasive tool comprises conducting housing whose working surface is provided with abrasive grains secured to the housing through the first metallic layer adjacent to the housing, second intermediate metallic layer, and third metallic layer which have different rigidity. The first layer is made of a porous material whose rigidity is 5.0-5.5. The second layer is made of plate material whose rigidity is 2.0-3.5. The third layer is made of a metal whose rigidity exceeds 5.0. Between the second and third layers is an additional layer made of a porous material. The abrasive grain are positioned on the first layer. ^ EFFECT: increased operation life. ^ 3 cl, 1 dwg, 1 tbl, 4 ex |
