Хонинговальные головки

Metallic Titanium Titanium and titanium alloys have a low density (p = 4.5 g/cm3) and high ten­sile strength (Rm = 900 — 1400 N/mm2). They exhibit good heat resistance up to temperatures of ca. 500 °C. In addition, they are resistant to many corrosive me­dia. From these properties are derived the main applications of titanium […]

5.2 Preparation Grinding tools are not in a usable condition as delivered or after a longer period of use. Grinding wheels exhibit macrogeometrical faults (e. g. roundness deviation, waviness, macro-wear, loss of profile), which lead to problems in the grinding process or to deficient dimensional accuracy of the components worked upon. Mi­cro-wear, i. e. dulling […]

With the help of parameters or characteristics, grinding processes can be generally described independently of the grinding method used. For a methodologically comprehensive comparison of various grinding strategies, various process parame­ters were generated, which will be described in the following. Process parameters offer the grinding technician the possibility of comparing various methods and interpreting the […]

Synthetically produced grit materials have replaced natural abrasives in a wide range of applications. The most important synthetic grit materials are: • corundum (Al2O3), • silicon carbide (SiC), • cubic boron nitride (cBN) and • (synthetic) diamond. Corundum and silicon carbide belong to the conventional grinding materials, while cBN and diamond represent the superabrasive category. […]

There is still no binding norm for the designation of grinding wheels containing diamond or boron nitride. The parameters can however be compiled from the manufacturer specifications and from the FEPA standard [N. N.10]. In accordance with these, the identification of a diamond or cBN grinding wheel is composed of a designation of its shape […]

Coarse-grain annealing followed by isothermal conversion is employed for subeu — tectoid steels with a C-content of 0.3 to 0.4 % (ferritic-pearlitic steel) in order to produce a coarse-grained structure with a ferrite network which is as closed as possible in which either pearlite or an intermediate structure is enclosed [RUHF58, SCHU78]. The application of […]

An intermetallic compound does not crystallise in the lattice type of one of its two components. It has its own lattice structure typical for the compound. The quanti­tative ratio of the atoms of both substances corresponds to their amounts in the al­loy composition [BUER01]. The Ti-Al system also forms stable intermetallic compounds [ROMM97]. The phase […]

Dressing comprises the establishment of both the grinding wheel’s shape (profil­ing) and the grinding wheel’s cutting ability (sharpening). Depending on the grinding wheel bond, the profiling process can not only produce the desired tool geometry, but also sharp edges and sufficient chip space. In practice, this is most commonly the case, which is why the […]

In the following, parameters will be introduced which characterise the grinding process. Material removal Vw describes the amount of workpiece material removed in the grinding operation. When grinding cylindrical components, the material re­moval Vw is calculated as a function of the diameter of the unfinished part dwA, the final diameter dwE and the grinding length […]

Corundum is crystalline aluminium oxide Al2O3. Several types of corundum are used as abrasives. Basically, we distinguish between fused and sintered corundum according to its method of production. Fused corundum or electrocorundum in­clude white, brown and normal corundum. Special forms of single crystal and zir­con corundum are available to meet special requirements. Sintered bauxite and […]