Рубрика: Life Cycle and Sustainability of Abrasive Tools

Tool Breakage

A robust, untroubled grinding process needs safety parameters for tool production [KLOM86, p. 11]. Tool breakage might be caused by wrong tool design, manu­facturing defects, inapproriate choice, faulty handling or storage, improper use, and clamping, etc. [DIN11]. Several organizations define safety measures for grinding wheel use, such as Berufsgenossenschaft or OSHA (Occupational Safety and Health […]

Adhesion

The direct contact of body and counter body can lead to atomic bonds (“micro weldings”), which are defined as adhesion [GAHR87, RABI95]. A relative movement of the contact partners does not necessarily involve that the bonds break within the original contact areas, so that material transfer can happen [HABI80]. Adhesive layers change the friction conditions. […]

Corundum

2.1.1 Chemistry, Types and Characteristics of Corundum Corundum is crystalline aluminum oxide, Al2O3, and also known as alumina. Al2O3 is also the active element in the natural abrasive material emery [LEWI76, p. 9] and in the gemstones sapphire and ruby. Aluminum oxide occurs in at least five modifications, a-Al2O3, P-Al2O3, y-Al2O3, 5-Al2O3, and e-Al2O3. The […]

Performance of Metallic Multi-layered Bonds

Metallic bonds provide high grit retention and low wear during grinding. However, a copper bonding might smear during grinding. Metallic bonds might have low porosity, so that fillers in the bond are added for lubrication during grinding. Metallic bonded tools are difficult to condition mechanically [WEGE11]. Electro physical and electro chemical processes can be applied […]