Хонинговальные головки

The process variants up — and down-grinding can be set in the case of creep feed grinding, using the favorable alternative for the particular machining conditions. If the vectors of the cutting and feed motion have the same direction at the contact point of abrasive grain and material, the process is defined as down-grinding. In […]

Grinding with segments represents the rough, high stock removal end of the flat grinding spectrum. The machine can be very large with powerful motors. The largest recently had a 200-diameter chuck, 117-diameter grinding wheel, and a 600-hp wheel drive custom built for a company to manufacture saws [Anon. 1995]. The majority of segment grinders have […]

Taking both the beneficial and negative impacts of high speed, Table 17.2 gives the maximum stock removal rate as a function of wheel width for a 10-kW spindle. TABLE 17.2 Maximum Stock Removal Rates as a Function of Wheel Width At 160 m/s, to reap benefits from the high speed, the spindle power requirement is […]

The selection of the appropriate load/unload mechanism is a major source of cycle time savings. Options include: • Through-the-work-spindle loading. Small parts are fed through the workhead into a chuck. Each new part ejects the preceding part that falls or is held by a receiving arm. Grinding resumes as soon as the ground part and […]

The support surface of a workrest should be harder than the workpiece. The workrest also has to be tough and capable of withstanding the knocks encountered on the factory floor. The wear-resistant surface of the workrest is selected according to the types of work material ground. For steels, tungsten carbide inserts provide a suitable surface. […]

Three grinding wheels listed in Table 19.5 were each tested using an L827 orthogonal array to determine the most favorable conditions. The aluminum oxide wheel listed having 42% porosity gave better results than a number of other aluminum oxide wheels tested for grinding Inconel 718. The CBN wheels listed also had increased porosity, 40% compared […]

It has been shown that the effect of resonance is to destabilize the process. It has also been argued that static compliance can reduce growth rate of regenerative vibration. In this context, we are referring to static compliance that does not contribute toward a resonance. The resonance of a machine is the combined effect of […]

A characteristic feature of grinding dynamics is that the elastic deformation of the grinding wheel is too large to be neglected and, furthermore, it has a significant influence on the process stability. The contact stiffness of the grinding wheel is defined as the relationship between the normal compressive force Fn and the elastic deformation of […]

In addition to the concentrates, water composite cooling lubricants contain a high percentage of water. The properties of this cooling lubricant group are, therefore, crucially influenced by the quality of the mixing water used, upon which special requirements must be placed concerning the nitrate, chloride, sulphate, and phosphate content, total hardness, pH-value, and the microbial […]

The grinding wheel state is of substantial importance for the quality of the grinding results. The wheel condition can be described by the characteristics of the grains. Wear can lead to flattening, breakage, and even pullout of whole grains. Moreover, the number of cutting edges and the ratio of active/passive grains are of importance. Also, […]