Рубрика: Life Cycle and Sustainability of Abrasive Tools

Functional Requirement to Suppress Chemical Reactions

Chemical reactions arise from the reactivity between the system components. Therefore, low chemical reactivity between all system components including grits, tool bonding, workpiece material, cooling lubricants and their additives is favored (Fig. 7.29). In addition, low mechanical pressure slows down chemical reactions as does low heat, which has been tackled earlier. Brinksmeier and Wilke [BRIN04] […]

Grit Protection During Tool Manufacturing

Coatings on diamond grits enable the tool manufacturer to choose an inexpensive bond material with iron, which otherwise would shorten the diamond life time [KOMP05]. In addition, elevated tool manufacturing temperatures can be applied [KOMP05]. 2.7.1.3 Grit Alignment During Tool Manufacturing Grits for coated tools are coated to enhance their electrostatic properties. A grinding belt […]

Frits

Frit is a generic term for a material that is generated by blending minerals, oxides, and other inorganic compounds, heating to at least melting temperature, cooling, and pulverizing [HAY90]. An example frit production process is given as follows: Melting of the ingredients above 1150 °C, holding at the temperature for 4 h, cooling down in […]

Special Grinding Wheel Types

4.1.2.1 Centerless Grinding Wheels Centerless grinding is commonly applied for large batch and mass production. In this circumferential grinding variant, the workpiece is not fixed along its axis between centers, but is supported on its circumference. Centerless grinding can be external or internal. In external grinding, the workpiece lies between grinding wheel, workrest plate and […]

Disposal

The European Waste Catalogue (EWC) [or Verordnung ueber das Europaeische Abfallverzeichnis (AVV)] classifies used honing and grinding tools with the code 12 01 21 or 12 01 20, if they contain hazardous materials [BGBI01]. The main category 12 includes waste of material removal processes and physical and chemical surface alteration. The waste generator has to […]

Balancing of Rotating Wheels in the Tool Spindle by Automatic Balancing Systems

Weights are moved electromechanically inside the balancing system to compensate for the original imbalance. The balancing systems can be mounted on the tool flange or inside the tool spindle [MPM12]. The position of the two masses inside the balancing system results in one angle between the masses and another angle between resulting force and tool […]