Хонинговальные головки

As in the case of external cylindrical grinding, internal cylindrical grinding is also classified as • internal cylindrical peripheral crosswise grinding (plunge grinding) or • internal cylindrical peripheral longitudinal grinding (longitudinal grinding). The kinematics of internal cylindrical grinding is identical to that of the exter­nal cylindrical grinding methods between centres already described. The equations derived […]

In the case of surface peripheral plunge grinding, there is a possibility of changing the material removal rate by means of both workpiece speed and the depth of cut. However, one can also alter both variables in an inverse fashion such that Q’w re­mains constant. Fig. 6-110 shows how the methodological variants of deep feed […]

A variation of the contact pressure pn does not always have an obvious influence on the process parameters and the work result. The tool’s specifications and asso­ciated wear characteristics often constitute parameters for influencing pn. In prac­tice, however, effects arising from the contact pressure can be cited for the major­ity of honing processes. Whereas in […]

The principle of peripheral external cylindrical lapping is illustrated in Fig. 8-4c. A slit in the tool enables the widening and narrowing of this sleeve-shaped tool design. This allows the intended working pressure and the desired dimensions to be adjusted. In order to improve the shape in terms of cylindricity and roundness, a rotational and […]

In free abrasive grinding, the choice of abrasive material, the compound used as well as process times and parameters should be taken into consideration as process input parameters. The selection of a suitable abrasive material depends above all on the desired result. For a large material removal and short production times, an abrasive chip-type should […]

The mechanical energy added during the grinding process is converted to a large extent into heat during cutting edge engagement. Most of this heat relates to sur­face friction and plastic material deformation, whereby the main source of heat is to be found beneath the abrasive grain. Because of this, there is a local increase in […]

Surface or flat grinding serves to create surfaces that are either completely level or extend in the main feed direction of the grinding wheel in a straight line. Surface grinding comprises the methods of peripheral plunge, peripheral longitudinal, side plunge and side longitudinal grinding. In industrial practice, the most often util­ised methods are • peripheral […]

In the case of external cylindrical peripheral plunge grinding, the material removal rate generally set by the radial feed rate. Workpiece speed is connected with the radial feed rate by the radial feed velocity. In this way, changes in process and output parameters can also be discussed in relation to vw. Fig. 6-114 provides an […]

In honing, cutting speed has a direct influence on the material removal rate. If the contact pressure is given, which determines the number and cross-section of the chips, the cutting speed indicates the average chip length achieved per time unit and thus the material removal rate (Fig. 7-12). The generation of cutting speed vc from […]

The properties of the lapping disc are determined by both geometrical factors and the working material. When machining workpieces with large surfaces, disc grooving is necessary in order to ensure that there is an even supply of grains at all points on the lapping disc [SMIT83]. The abrasive materials mainly used in lapping processing are […]