Abrasives Manufacturing Processes 2

The mechanisms which ultimately effect material removal take place on the boundary surfaces between the polishing grains and the workpiece surface. The abrasives in table 8-2 have proved effective for the polishing of metallic and hard — brittle materials. Table 8-2. Abrasives used for the processing of metals, hard and brittle materials and glass [WASC93] Read more

Other Variants Manufacturing Processes 2

6.4.1 Gear Grinding A special area of application in grinding is the finishing of tooth flanks. Cutting an involute profile requires the use of methods specifically designed for tooth flank machining, these being subdivided according to method kinematics into generat­ing and profile methods. In order to fulfil performance, noise emission and wear requirements there are Read more

Tool Specifications Manufacturing Processes 2

In addition to the variables involved in the honing process, the most important in­fluence on the work result are the specifications of the honing stones, i. e. grain type, grain size, type of bond, hardness and treatment. With respect to grain type, two groups of materials are distinguished according to their properties. As in grinding, Read more

Process Monitoring Manufacturing Processes 2

9.2 The Necessity of Process Monitoring Increasing demands on quality and higher time and cost pressures require more process security. This however has been made increasingly difficult by expanding process and component complexity [KLOC01]. An economical utilisation of automatic grinding processes presupposes their behaviour to be reproducible. Despite the increased expenditure on quality control and Read more

Reliability of Process Monitoring Manufacturing Processes 2

As industrial praxis shows, in the case of complex monitoring systems there are frequent false alarms due to the dynamic and stochastic behaviour of the manufac­turing process. Thus, such systems are not always accepted in operation; they are then shut off by the machine operator. Many research centres around the world [BARS91, INAS93, MORI93, WECK95] Read more

Kinematic Principles Manufacturing Processes 2

The principles of the honing process will be explained using the example of short — stroke honing. The movement between tool and workpiece can be divided into three orthogonal speed components (Fig. 7-1): • two components parallel to the workpiece surface (axial feed rate vfa, tangential feed rate vft) • one component perpendicular to the Read more

Polishing Fluid Manufacturing Processes 2

The spectrum of tasks the polishing fluid must fulfil comprises supporting possi­ble chemical reactions, regulating heat, reducing the adhesion of the active part­ners involved in the process, and finally the distribution and transport of the abra­sive. Chemical-mechanical polishing processes are strongly dependent of the pH value of the polishing fluid. When polishing copper, for example, Read more