Рубрика: Manufacturing Processes 2

Tool Manufacture

3.4.1 The Manufacture of Tools with Conventional Abrasives The production of abrasive tools bonded with vitrified and synthetic resins is the same from the standpoint of the manufacturing sequence. Yet manufacturing processes do differ because bond properties vary in some points. Fig. 3-18 pro­vides an overview of the particular production steps. 3.4.1.1 The Manufacture of […]

Hardening, Austempering

A further type of material heat treatment is hardening (H) and austempering. Dur­ing steel hardening, first the carbon is dissolved in the austenitic zone. The carbon precipitation that takes place at normal cooling speeds is then stifled by a high cooling speed. Thus, at supercritical cooling speeds, after falling short of the Ms — temperature […]

4.8. Grinding Brittle Materials

The designation “brittle”, often used in manufacturing, characterises a certain ma­terial group according to their mechanical properties. High brittleness, i. e. low fracture-resistance, and hardness represent a combination of material properties that, on the one hand, influences the range of uses of these materials, but also de­termines their machinability and workability properties. Several factors influence […]

Methods with Stationary Tools

Non-rotating or stationary dressing tools do not exhibit any movement in the pe­ripheral direction of the grinding wheel. The grinding wheel profile originates by means of axial movement along the wheel contour, comparably to a turning proc­ess (Fig. 6-2). Between the dressing tool and the rotating grinding wheel, there is a radial dressing feed rate […]

Grinding Temperatures

The by far largest amount of mechanical energy introduced to the process is con­verted to heat during grinding. This heat is then conducted away by chips, cooling lubricant, the grinding wheel and the workpiece. Depending on the process condi­tions, the amount of heat flow into the workpiece amount to up to 85 % [MARI77, LOWI80, […]