Хонинговальные головки

9.1 Abrasive Blast Cutting According to DIN8589 [DIN78a] abrasive blast cutting is to be classified with the group machining with geometrically undefined cutting edges. In contrast to other methods in that category such as grinding, honing and lapping, it is used for a tar­geted influence of the surface layer. From this angle, it has gained […]

The dressing process creates the grinding wheel shape and topography required for the respective machining task. Fluctuations of the actual depth of dressing cut, temperature drift of the machine axes relative to each other and further sources of disturbance cause dressing errors and thus fluctuations in workpiece quality as well. In order to guarantee a […]

In order to make a sufficient analysis of the grinding process, a number of influ­ences must be taken into account, and their relevance of their respective effects on the process must be evaluated. Some essential input parameters are the grinding tool, the workpiece to be machined, the variables as well as influences derivable from cooling […]

In contrary to conventional honing tools, cBN or diamond honing stones must be adapted to the form of the workpiece prior to use. For the honing of holes, for ex­ample, the tools are ground to the dimensions of the hole in a pre-tensioned state on an external grinding machine with silicon carbide or precious corundum […]

Planar lapping is used to create flat surfaces with high surface qualities. Two method variations are distinguished. In the first case, the workpieces are freely movable and are guided over the lapping disc; in the second case they are placed in so-called carriers with restricted guidance in order to avoid reciprocal damages. The workpieces are […]

Common to all blasting methods is that kinetic energy is responsible for the opera­tional performance. The blasting abrasive used is also furthered and accelerated in the case of pressure blasting by fluid or gaseous carrier means. In centrifugal blasting, a centrifugal wheel accelerates the blasting abrasive. The amount of re­moval depends thereby on the mass […]

10.6.1 Monitoring Grinding Wheel Wear with the AE Effective Value The AE effective value depends to a great extent on the specific material removal rate Q’w, the dressing conditions and the grinding wheel specifications as well. Likewise, the level of the URMS-value in the individual process phases correlates with the effective peak-to-valley height of the […]

The input variables of the grinding process determine the process parameters and the grinding results to a decisive degree. A continuous chip removal is guaranteed according to DIN 6580 by the coordination of the cutting motions and the infeed motion. The infeed motion can be composed of several components. Moreover, in some methods, a depth […]

The input variables of the honing process can be divided into system quantities and variables (Fig. 7-7). Fig. 7-7. Process variables and result of the honing process The following system quantities represent most frequently fixed process vari­ables: • the machine, with its performance data, material rigidity and dynamic behav­iour, • the workpiece, with its properties, […]

Different from lapping with one disc is the double-sided, simultaneous machining of two opposing planar surfaces (Fig. 8-6). In this method, the workpieces are in­serted in geared carriers (rotating discs). These are held by pin rings or gear rings. Then they are driven, they rotate about both their own axis and the central axis. The […]