Хонинговальные головки

Besides the basic materials described above, the bonds of abrasive tools occasion­ally contain a number of additives. These are, on the one hand, necessary for the manufacturing process of the tools, and, on the other, help to create specifically defined grinding properties. Fillers contained in the matrix of grinding wheels bonded with synthetic resin can […]

A large amount of tools with abrasives on a backing material are turned into end­less loop belts so that a bond location, called a seal, becomes necessary. Great demands are placed on the tear strength of the seal area, especially at high chip removal rates. Synthetic resin adhesives and improved adhesive tech­nologies permit large chip […]

Iron-carbon alloys with a C-content of more than 1.7 % (usually 2 to 4 %) are considered iron-casting materials. They are usually shaped by casting and a final machining operation for sizing — not so often by forming. First and foremost in this group of materials are annealed cast iron, cast iron with lamellar and […]

Aqueous solutions used for grinding purposes consist, like oil-in-water emulsions, of over 90 % water. The concentrate is devoid of mineral oil, consisting, for ex­ample, of polymers or salts [MANG76]. No emulsifiers are required to obtain a fine and even distribution of the concentrate, as the latter is dissolved molecularly, as is the case in […]

The topography of the grinding wheel after tool preparation largely influences its cutting properties and thus its behaviour during the process as well as the output. By means of a precise guidance of tool preparation, the grinding wheel surface can be adjusted to the given requirements. For example, producing a rough topography is always recommendable […]

In centreless external cylindrical peripheral longitudinal grinding, there is a larger number of parameters, as can be seen in Fig. 6-56. The workpiece can sometimes have cranks of smaller diameters that are not to be ground and is characterised by the main dimensions and stock allowance z. To reduce the workpiece stock allowance, the grinding […]

Not only the workpiece, but also the tool is subjected to high temperatures and pressures in the contact zone. The result of this is microscopic wear in the grit and the bond (Fig. 2-12). Grit wear begins in the crystalline layers lying near the surface of the grit. Ex­treme pressures and temperatures initiate oxidation and […]

According to DIN 69 111, grinding components with bonded abrasives are com­prised of straight, conical, and reduced grinding wheels, abrasive cutting discs, grinding wheels affixed to support discs, cup grinding wheels, bent grinding wheels, grinding segments, mounted points, honing stones and oil stones (Fig. 3­10). Ignoring form and dimensions, all of these types exhibit the […]

4.1 The Concept of “Machinability’’ in the Grinding Process Machinability is understood as a property of a material that allows for chip re­moval under given conditions. It thus describes the behaviour of a material during chip forming. The machinability of a material must always be considered in conjunction with the machining method, the tool and […]

4.6.1 Construction and Structure The specific properties of these materials, adapted to the respective field of appli­cation, are essentially contingent on chemical composition, possible cold forming and the heat treatment method. Corresponding to their most important alloying elements, nickel-based alloys can be subdivided into the following main groups [DIN42, DIN43, DIN44, DIN45, EVER71]: I. nickel-copper […]