Хонинговальные головки

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 […]

The areas of application of the particular methods can be briefly summarized as follows. Discontinuous Generating Gear Grinding with two Disc Grinding Wheels: • gear quality up to quality 2 according to DIN 3961 [DIN78], • long machining durations, • suitable for gears up to module 36 mm and about 5 m external diameter, • […]

The principles of the honing process will be explained using the example of short — stroke honing. The movement between tool and workpiece can be divided into three orthogonal speed components (Fig. 7-1): • two components parallel to the workpiece surface (axial feed rate vfa, tangential feed rate vft) • one component perpendicular to the […]

8.1 Lapping Lapping is a mainly room-bound process with geometrically undefined cutting edges. It is a production and finishing process, respectively, defined as chipping with loose grains distributed in a fluid or paste (lapping slurry) which are guided with a usually shape-transferring counterpart (lapping tool) featuring ideally undi­rected cutting paths of the individual grains [DIN78a]. […]

The spectrum of tasks the polishing fluid must fulfil comprises supporting possi­ble chemical reactions, regulating heat, reducing the adhesion of the active part­ners involved in the process, and finally the distribution and transport of the abra­sive. Chemical-mechanical polishing processes are strongly dependent of the pH value of the polishing fluid. When polishing copper, for example, […]

In the case of collision between the grinding wheel and the workpiece or other machine components, the motor current and acoustic emission increase to levels that are usually more than three times the amplitude of rough grinding processes. What must be evaluated is the acoustic emission or the effective current of the grinding wheel drive. […]