Хонинговальные головки

Nickel-based alloys are highly temperature-resistant, resistant to corrosion and also very tough. Thus, they are presently the more often exploited material for components that are exposed to non-uniform mechanical strains at working tem­peratures up to 1100 °C. Because of their high heat resistance, thermal fatigue re­sistance and oxidation resistance in the high-temperature range of aviation […]

The efficiency of the cooling lubrication is not only determined by the cooling lu­bricant’s physical and chemical properties, but also by the method of supplying the fluid into the cutting gap. For a sufficient supply of the contact area with the cooling lubricant, the cool­ing lubricant volume rate, the cooling lubricant discharge speed and the […]

The depth of dressing cut aed is used for stationary dressing tools and diamond form rollers. It acts directly upon the dressing chip thickness. At higher depths of cut, the initial effective surface roughness of the grinding wheel increases along with the dressing forces. For dressing cBN and diamond grinding wheels, which are highly resistant […]

The category of natural grinding resources comprises the grit materials quartz (flint), corundum, emery, garnet and diamond. Except for diamond, these materi­als are usually of insufficient strength, so they are of secondary importance in comparison with synthetic grit materials for most industrial purposes. A further reason for the exclusion of natural grit materials is the […]

The parameters used to designate grinding wheels made of bonded abrasives fol­low DIN 69 100 und DIN 69 186 (Figs. 3-13 and 3-14). The following specifica­tions are required in the order indicated for the designation of conventional grind­ing components: 1. name 2. DIN-main number 3. form number 4. profile shape 5. nominal size 6. material […]

Alloying and trace elements can influence the machinability of steel by changing the composition or by forming lubricating or abrasive inclusions. In the following, the influence of the most often used elements on the machinability of steel materi­als will be described. Manganese Manganese improves hardenabillity and increases the strength of steels (ca. 100 N/mm2 per […]

In general, nickel-based alloys are numbered among materials that are difficult to machine because of their mechanical, thermal and chemical properties [DIN84, KUNZ82]. Due to varying chemical composition and microstructure however, nickel-based alloys show fluctuations in machinability. On the whole, the high heat resistance and low heat conductivity of nickel — based alloys as well […]

The successfulness of the cooling lubricant chosen for a machining task depends upon its proper treatment. For this, constant inspection of the chemical, physical and biological properties of the cooling lubricant is required. Based on the results gained from monitoring the lubricant, necessary maintenance arrangements can be induced. The type and extent of supervision depends […]

Increasing the dressing feed frd during roller dressing leads, analogously to exter­nal cylindrical plunge grinding, to a higher dressing material removal rate. Be­cause of this, the resultant grinding wheel effective surface roughness and dressing forces increase. In Fig. 6-23, the influence of dressing feed on the grinding forces as well as on workpiece roughness is […]

Diamond is chemically pure carbon that crystallises as a natural product under ex­treme pressure and heat over a long period of time. About 80 % of natural dia­monds are rejected for use as decorative objects because of their small size and de­ficient purity, making them available to industry. Their properties are nearly identical to synthetic […]