Хонинговальные головки

Increasing the dressing feed frd during roller dressing leads, analogously to exter­nal cylindrical plunge grinding, to a higher dressing material removal rate. Be­cause of this, the resultant grinding wheel effective surface roughness and dressing forces increase. In Fig. 6-23, the influence of dressing feed on the grinding forces as well as on workpiece roughness is […]

Diamond is chemically pure carbon that crystallises as a natural product under ex­treme pressure and heat over a long period of time. About 80 % of natural dia­monds are rejected for use as decorative objects because of their small size and de­ficient purity, making them available to industry. Their properties are nearly identical to synthetic […]

The superabrasive grits cBN and diamond are a great deal more expensive than the conventional abrasives already mentioned. Thus, the construction of su­perabrasive grinding wheels is also different from that of conventional ones. A further reason for the altered construction has to do with the fact that such grind­ing wheels exhibit a higher wear resistance. […]

The amount, form and arrangement of the structural elements and thus the me­chanical properties of steel can be adjusted to the requirements at hand by means of a defined heat treatment. Heat treatment is understood as a process in the course of which a workpiece or a workpiece section is exposed to defined temperature sequences […]

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 […]