Хонинговальные головки

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 […]

9.1.3 Abrasive Cutting Abrasive cutting assumes the function of cutting lengths of bar steel and profiles especially in rolling mills, but not rarely in forges and continuous casting plants as well. In these contexts it competes with guillotine shears and sledge saws. In the face of improved cutting quality as well as the possibility of […]

As industrial praxis shows, in the case of complex monitoring systems there are frequent false alarms due to the dynamic and stochastic behaviour of the manufac­turing process. Thus, such systems are not always accepted in operation; they are then shut off by the machine operator. Many research centres around the world [BARS91, INAS93, MORI93, WECK95] […]

6.3.5.1 Kinematic Fundamentals According to DIN 8589 [DIN78a], there are many different variations of belt grinding, of which only the most important are indicated in Fig. 6-64. The main factors in classifying them are on the one hand the position of the feed motion characterising the method, and on the other the contact element (roller […]

Grinding Wheel Selection The primary considerations in choosing grinding wheel specifications for a par­ticular machining task are the grindability of the material and the output require­ments. From grinding wheel specifications, information regarding their appropri­ateness for a specific machining task can be derived. Grain type is selected especially with a view to hardness, toughness and prone­ness […]

Stroke length lH has a considerable influence on shape accuracy in longitudinal stroke honing. More than in roundness errors, lH plays a decisive role in cylindric — ity errors. The larger the stroke length, the more the hole is widened at the ends. Fig. 7-15 provides a schematic illustration of the contour of a hole […]