Disclosed herein is a grinding wheel including an annular wheel base and a plurality of grinding stones fixed to an outer circumferential portion of the lower end of the annular wheel base. Each of the grinding stones is made of a mixture of abrasive grains and photocatalytic particles which are held together by a binder. The abrasive grains are diamond abrasive grains, and the photocatalytic particles are titanium oxide (TiO.sub.2) particles.

A grinding wheel used for grinding of a work piece is provided. The grinding wheel includes a circular disc-shaped base having a fixed end surface in contact with a mount of grinding apparatus and a free end surface on the opposite side to the fixed end surface, and plural abrasive stone chips arranged in a ring manner on the free end surface of the base. The abrasive stone chips are each formed into a block shape having a surface in which two or more kinds of plate-shaped abrasive stone members containing abrasive grains and a binder are exposed to the outside by overlapping the two or more kinds of abrasive stone members. The surfaces exposed to the outside in the abrasive stone chips serve as grinding processing surfaces that get contact with the work piece.

A grinding wheel used for grinding of a work piece is provided. The grinding wheel includes a circular disc-shaped base having a fixed end surface in contact with a mount of grinding apparatus and a free end surface on the opposite side to the fixed end surface, and plural abrasive stone chips arranged in a ring manner on the free end surface of the base. The abrasive stone chips are each formed into a block shape having a surface in which two or more kinds of plate-shaped abrasive stone members containing abrasive grains and a binder are exposed to the outside by overlapping the two or more kinds of abrasive stone members. The surfaces exposed to the outside in the abrasive stone chips serve as grinding processing surfaces that get contact with the work piece.

A floor polishing or grinding pad assembly is provided. In one aspect, a polishing or grinding pad assembly employs a fibrous pad, a reinforcement layer or ring, and multiple floor-contacting disks. In another aspect, the reinforcement layer includes a central hole through which the fibrous pad is accessible and the fibrous pad at the hole has a linear dimension (x) greater than a linear dimension (y) of one side of the adjacent reinforcement layer. In yet another aspect, at least one of the floor-contacting disks has an angle () offset from that of a base surface of the disk, the fibrous pad and/or the reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks. In another aspect, the reinforcement layer includes a wavy or undulating internal edge shape.

A workpiece abrading pad apparatus is provided. In one aspect, a grinding pad apparatus employs a flexible pad, a flexible metallic reinforcement layer or ring, and multiple floor-grinding disks. In another aspect, a metallic reinforcement ring includes a central hole through which a fiber or foam pad is accessible. Another aspect employs a spring steel reinforcement ring to which multiple diamond-based abrasive disks or dots are attached. In yet another aspect, at least one floor-contacting disk attached to a reinforcement ring includes sintered powdered metal with diamond particles mixed therein. A further aspect employs abrasive, floor-contacting disks or dots including posts extending from backsides thereof for attachment to a reinforcing ring or layer.

A grinding device including a grinding wheel, a hub attached to the grinding wheel, the hub movable relative to the grinding wheel in an axial direction of the hub.

A fixed abrasive article having a body including abrasive particles contained within a bond material, the abrasive particles including shaped abrasive particles or elongated abrasive particles having an aspect ratio of length:width of at least 1.1:1, each of the shaped abrasive particles or elongated abrasive particles having a predetermined position or a predetermined three-axis orientation.

Disclosed are an additive raw material composition and an additive for superhard material product, a method for preparing the additive, a composite binding agent, a superhard material product, a self-sharpening diamond grinding wheel and a method for manufacturing the same. The raw material composition consisting of components in following mass percentage: Bi2O3 25%40%, B2O3 25%40%, ZnO 5%25%, SiO2 2%10%, Al2O3 2%10%, Na2CO3 1%5%, Li2CO3 1%5%, MgCO3 0%5%, and CaF2 1%5%. The composite binding agent is prepared from the additive and a metal composite binding agent. The self-sharpening diamond grinding wheel prepared from the composite binding agent has high self-sharpness, high strength, and fine texture, is uniformly consumed during the grinding process, does not need to be trimmed during the process of being used, and maintains good grinding force all the time, fundamentally solving the problems of long trimming time and high trimming cost of the diamond grinding wheel.

A process can include forming at least one precursor abrasive component on a core and infiltrating at least a portion of the precursor abrasive component. The precursor abrasive component can include a body including a metal bond matrix and abrasive particles. Infiltrating can be performed after forming the precursor abrasive component with an infiltrant material. The infiltrant material can include a metal element, an alloy or a combination thereof. In an embodiment, forming at least one precursor abrasive component can include simultaneously joining the precursor abrasive component to the core.

A process can include forming at least one precursor abrasive component on a core and infiltrating at least a portion of the precursor abrasive component. The precursor abrasive component can include a body including a metal bond matrix and abrasive particles. Infiltrating can be performed after forming the precursor abrasive component with an infiltrant material. The infiltrant material can include a metal element, an alloy or a combination thereof. In an embodiment, forming at least one precursor abrasive component can include simultaneously joining the precursor abrasive component to the core.