Хонинговальные головки

Coated abrasive tools are composed of abrasive grits that are held by a bond on backing material (Fig. 4.4). Coated abrasive tools are belts, pads, or discs. Abrasive discs are used for preparing car bodies before painting [BORK92, p. 42 ff.]. Deburring, roughing, and finishing are important operations with coated tools in the metal grinding […]

In general, the recycling or re-use of grinding tool components takes place in very few instances, although it is technically feasible in many cases. The reason lies in cost considerations. Today, the costs of recycling and re-use are higher than the benefits. This might change in the future because the decision is volatile and depends […]

Ceramographic material analysis helps to understand and qualify the grinding wheel structure by picture analysis [KLOM86, LINE92]. However, samples from the abrasive layer have to be cut and prepared by embedding and polishing. Additional element analyses unveil material composition and chemical reactions during the tool production process [LINE92, p. 39 f.]. Back pressure is a […]

Malkin defines attritious wear referring to the development and growth of wear flats on the tips of active grains. Attritious wear is measured by the percentage of the wheel surface covered with wear flats [MALK68, p. 36]. Jackson defines attritious wear as wear that occurs “atom by atom” by physical and chemical interaction between grain […]

Companies start to include Corporate Social Responsibility into their corporate culture [MCCL10]. Traditionally, lower need levels of people were regarded, such as food, health and safety, but in the future the social aspects will likely be extended to higher levels such as worker satisfaction, self-esteem, etc. [HUTC10]. Societal aspects of product or process assessment include […]

8.1 Case Study on Conventional Abrasives Versus Superabrasives for Vitrified Bonded Tools The user can decide between conventional tools with corundum or silicon carbide or superabrasive tools with diamond or cubic boron nitride. Not only do the tools have different performance profiles, but also different embodied energies, which is important for accounting manufacturing energy to […]

Look at this small grit, this tiny grain, so small one must rub hundreds of them between finger and thumb to feel their sharpness. Insignificant little grits and easily slighted in our sophisticated technological world, but without this small fragment of abrasive, transformed, when viewed under a microscope, into jagged heroic blocks — without these […]

At room temperature, diamond is the material with the highest known temperature conductivity, which can reach up to 2100 W/(m K) depending on crystal purity [SEN91]. Furthermore, diamond exhibits a low electric conductivity, which can increase significantly with Boron assembled into the diamond crystal structure. In oxygen atmosphere, diamond has a low friction coefficient of […]

2.8.1.5 Effect on Tool Production High sintering temperatures over 1300 °C can occur in manufacturing of vitrified bonded tools. In particular, diamond features low thermal wear resistance in air, which forced manufacturers to develop special low-temperature sintered bonds and to apply inert atmospheres [LINK15]. Electric and magnetic properties are important for electro-plated bonds because they […]

3.1.1 Chemistry and Types of Resin Bonds A resin bonded grinding wheel consists of abrasive grits in a resin bond with or without fillers (Fig. 3.2). This wheel type has commonly a low porosity compared to vitrified bonded tools. Resins are viscous liquids capable of hardening. They are polymers, i. e. large molecule chains composed […]