Хонинговальные головки

In the polishing process, the abrasive particles are finely dispersed in a liquid medium or binder and are directed over the workpiece surface by a counterbody [KLOC05a, p. 404]. Therefore, the polishing tool is rather a paste or suspension of abrasive grits in a medium or binder [MARI04, p. 442]. In plate polishing processes, a […]

The body material has to withstand the grinding forces, the centrifugal forces from wheel rotation, and the resulting internal stresses. In the grinding process, the body material should dampen vibrations and transfer heat. Furthermore, the body material needs to be shaped easily into the wanted geometry and should have low weight. These requirements translate into […]

The performance of a grinding wheel, however, is not only a complicated function of all grinding wheel parameters such as grain nature and grain dimensions, nature of bond material, volumetric composition of the wheel etc., but, as said before, depends on the grinding conditions also [DECN70]. Micro-design of grinding wheels, i. e. structure and composition […]

For resin bonded grinding tools grit break-out is the main wear mechanism and, therefore, the grit holding forces within the bond are essential for tool wear [TOML76]. Abrasive particles worn more than 50 % of their diameter are not likely to retain in the bond any more. Moreover, there are details in the literature that […]

7.2.1 Evaluating Sustainability of Unit Processes In addition to economic, environmental and social sustainability, the technological dimension needs to be considered as a fourth dimension. Yuan et al. [YUAN12] suggest three strategies to increase sustainability in manufacturing processes: (1) Optimizing of the manufacturing technology by detecting and changing the parameters that affect material and energy […]

This case study assumes that the body of the superabrasive wheel is made of tempered low alloy steel 42CrMo4 (oil quenched). This steel offers a high strength along with good durability and advantageous thermal characteristics. First, the steel is cast into a round steel bar of a diameter of 394 mm. Then the bar is […]

Corundum (a-Al2O3) and water (H2O) can result in gibbsite (Al(OH)3, Eq. 2.1) or diaspore (AlO(OH), Eq. 2.2) [LUDE94, p. 77]. The reaction to the relatively soft gibbsite in Eq. 2.1 is likely at temperatures from 0 to 300 °C and pressures up to 1000 bar [LUDE94, p. 79]. Al2O3 + 3H2O! 2 Al(OH)3(gibbsite, Knoop hardness […]

Other than in grinding, diamond has far fewer limitations when machining steel by honing. This can be explained by the low cutting speeds, cooling and lubrication conditions in honing, which tend to suppress the reaction between diamond and workpiece materials with carbon affinity [KOPP81]. 2.3.4.2 Dressing Technology Natural diamonds of high purity are commonly used […]

Counting methods work for single particles or on their projection [SALM07, p. 140]. A common procedure for counting abrasive grits is laser granulometry. Herein, a mixture of loose samples in a fluid medium flows through a ring. Laser light leads to different shadowing effects depending on the grit size. Commonly, three proportions of different grit […]

Resin bonded grinding tools are manufactured via mixing, pressing and hardening at temperatures up to 200 °C (Fig. 3.5) [COLL88]. Resins consist normally of the two main components resin and hardener. Mixing both parts results in the reactive resin material. During hardening, the resin’s viscosity rises and a duroplastic material is generated. 3.1.2.1 Mixing and […]