Хонинговальные головки

In the case of continuous generating gear grinding, the tool used is a grinding worm with an exact gear rack profile (Fig. 6-84). The grinding worm and the gear are each driven by a separate synchronous reaction motor. The involute form arises by continuous rolling of the grinding worm and the gear. The process is […]

As precision components in internal combustion engines, valves control the neces­sary gas flow by blocking cross-sections of flow. While inlet valves are subject mainly to mechanical stresses, outlet valves are also exposed to thermal stress and chemical corrosion. Valves are therefore manufactured from various materials de­pending on their function. In the case of many high-stress […]

Especially for long-chipping workpiece materials, it is important that the cutting removal from the contact zone is ensured by honing oil. The lubricating effect is improved by increasing the viscosity of the honing oil. Fig. 7-30 and Fig. 7-31 show that lower viscous honing oils facilitate a greater material removal than higher viscous honing oils. […]

Three components are necessary for zonal polishing (Fig. 8-21): • The use of a suitable measurement technique is necessary to measure the re­spective surface topography. The data are compared to the target geometry so the respective fault profile can be acquired. Interferometric methods find par­ticularly broad use for the measurement of geometries. • The measured […]

Sensors for acoustic emissions to monitor process noise emitted during grinding are vibratory systems, the resonance points of which are determined by their con­struction. As a result, these sensors, working proportionally to acceleration, repre­sent filter systems that have a dampening or amplifying effect according to the frequency range. The AE sensor thus determines by its […]

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 […]