Хонинговальные головки

Fig. 6-88 is a schematic representation of profile grinding of an external gear tooth spur gear. The grinding wheel exhibits the profile of the tooth space in transverse section. The grinding wheel profile is transferred to the tooth flank by the depth of cut ae in the radial direction corresponding to the decreasing stock allowance […]

Turbine blades in jet engines are exposed to high levels of mechanical and thermal stress. The materials used must be highly heat-resistant and possess a high level of creep and rupture strength. Nickel-based forging alloys, those high-temperature properties are based on the mechanisms of mixed crystal, separation and carbide hardening, are especially suited to this. […]

7.4.1 Plateau Honing The goal of plateau honing is to achieve a defined surface topography character­ised by periodically appearing deep honing traces with interjacent, fine bearing surfaces called plateaus (Fig. 7-33). This surface topography is achieved in two phases. In addition, the workpiece is pre-honed with coarse-grained diamond hon­ing stones, e. g. D 150, or […]

Abrasive carriers have the task of receiving the abrasive in the form of slurrys or pastes in even distribution on their surfaces and binding them loosely. The re­moval and smoothing process must be supported by the abrasive carrier without the latter being involved in the process directly. This is the condition, chiefly, for a profiled […]

It is indispensable for the reliability of the attributes derived from the acoustic emission that the noise emissions stemming to the operation of the machine, which are not directly related to the machining process, are stationary and separa­ble from the process noise. Fig. 10-5 shows an assortment of relevant emission sources in grinding ma­chines. Measurement […]

In continuous profile grinding, a globoid-shaped grinding worm serves as the grinding tool. As opposed to continuous generating gear grinding, the globoid­shaped grinding worm does not have a tooth rack profile as its reference profile, but rather the contour of a tooth flank. Since we are dealing with a profile grinding process, contact between the […]

Honing is a cutting process with bonded grain and is used to improve the form, dimensional precision and surface quality of a workpiece under constant surface contact with the tool. In general, honing is applied after precision machining (e. g. grinding). Tables 7-1 and 7-2 illustrate the different honing techniques and their main fields of […]

Gear honing is a fine machining process for gears which was originally imple­mented after grinding in order to create low-noise surface patterns on the tooth flanks. In the process, small allowances of approximately 15 pm were removed from the flanks. In further developments, this procedure came to be used directly after hardening, eliminating grinding from […]

The mechanisms which ultimately effect material removal take place on the boundary surfaces between the polishing grains and the workpiece surface. The abrasives in table 8-2 have proved effective for the polishing of metallic and hard — brittle materials. Table 8-2. Abrasives used for the processing of metals, hard and brittle materials and glass [WASC93] […]

After converting the acoustic emission conveyed by the machine components by means of the AE-sensor, further analysis is possible using an electrical AC signal. Bandwidth and frequency composition as well as the dynamics of the AE are modified by the path of transmittance and the sensor properties. Now we have a high-frequency, broadband, stochastic signal […]