Рубрика: Manufacturing Processes 2


Because of the high requirements on machining methods in metal-cutting produc­tion, not only are optimal tools indispensable, but also the optimal accessories needed in production, e. g. cutting oil or lubricants. The relatively large contact areas between tool and workpiece are decisive for the selection of cooling lubricants. Because of these large contact areas, the […]

The Chemical Hypothesis

The realisation that surface layers form during polishing led to the development of the chemical hypothesis. The chemical hypothesis is thus based on corrosion proc­esses taking place between the usually water-based polishing fluid and the work­piece surface. The “driving force” here is the chemical reaction, with the mechani­cal contribution being limited to the evacuation of […]

Current Sensors

One method that has been increasingly used in recent years for indirect force measurement is recording the effective power of the main spindle. It is defined as: P = V3U • I • cos p (10.1) The effective power of the main spindle is in direct relation with the torque de­livered at the shaft of […]

Centreless Plunge Grinding

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 […]

The Lubricating Effect

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. […]

Zonal Polishing Methods

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 […]