Хонинговальные головки

Subject to achievement of quality levels, harder grits and bonds allow longer redress life and larger stock removal. The bond must not be too hard for the grinding operation and the grits should be sufficiently friable. Otherwise, grits eventually become blunt and are retained if grain forces rise to unacceptable levels. Blunt grits lead to […]

The machining-elasticity parameter K is a measure of the springiness of a grinding system. The parameter provides a convenient way to account for elastic deflections of the system due to grinding force. The use of the machining-elasticity parameter works best at frequencies well below the dominant resonant frequency of the system. K = true depth […]

Set-up geometry should provide rapid rounding and avoid convenient waviness. • Convenient waviness and marginal stability cannot be completely avoided. However, convenient waviness is unlikely to be a problem unless waviness is forced by vibration at the same frequency. • Static compliance in the system softens the imposition of errors into the workpiece and, hence, […]

9.3.1 Types of Grain Wear Overlap between the above-mentioned wear mechanisms leads to changes in the abrasive grain. These wear types are depicted in Figure 9.2. They basically can be divided into [3] Process Tool Single grain force Grain holding force Load impulse Toughness of the bond Load direction // Flattening Heat conductance Contact zone […]

A slightly different concept of lubricant distribution is the supply of cooling lubricant from the interior of the grinding wheel or the grinding layer. The fluid is fed into a chamber of the wheel body allowing the centrifugal force to distribute it through radial channels to the grinding layer. Through pores or gaps in the […]

11.5.1 Introduction Primary motion between tool and workpiece characterizes the grinding process, but also supporting processes and systems are of major importance. In this chapter, basically the monitoring of the conditioning process and the coolant supply will be discussed. 11.5.2 Sensors for Monitoring of the Conditioning Process The condition of the grinding wheel is a […]

Surface conditioning of a grinding wheel generally includes the two requirements of truing and dressing. Dressing replaces worn (dulled) cutting edges with sharp edges by fracturing the worn grains and regenerates a wheel face loaded with swarf by removing a layer from the face with a dressing tool. Dressing a superabrasive wheel is much more […]

A variation on the Flat and Vee is the Double Vee slideway. This again depends on gravity for its preload and is self-compensating for wear. However, it can handle changes in the load position with much less yaw error. The major difficulty with this slideway design is in the manufacture, especially over any significant length. […]

15.12.1 Introduction The problems with spindles designed for small wheels is somewhat different to those for larger wheels in that nearly all wheel bond types, including most superabrasives, are limited by bond strength to operating in the speed range of 35 to 60 m/s. Taking 100 mm (4) diameter as the cutoff for this discussion, […]

16.1 TYPES OF SURFACE GRINDING PROCESS Terms for grinding were incorporated in an international dictionary for material removal processes by International Institution for Production Engineering (CIRP) after agreement between represen­tatives of a number of countries including from United States, Europe, China, Japan, and Asia [CIRP 2005]. The dictionary gives terms for material-removal processes in French, […]