1 - Introduction

Abstract

This chapter introduces a book that deals with general problems of manufacture, the theory of precise geometrical design, the principals involved in inspection, and the problems arising from the use of different types of helicoidal surfaces. To design and manufacture these surfaces with precision, it is useful to formulate a generally valid mathematical model that can become the basis for the development of CAD/CAM/CAQ/CIM systems. Application of CAD facilitates design of helicoidal surfaces and their generating tools. Use of CAM solves the fine truing of grinding wheels using CNC programs; CAQ provides the possibility of 3D-type automatic checking to maintain high quality of product, all within a computer integrated manufacturing (CIM) system. Traditional machine tools (not controlled by programs) employing additional automation can be adapted for the manufacture of precise helicoidal surfaces and they can be connected to modern manufacturing systems. In this way, helicoidal surfaces created in manufacturing cells can be manufactured with precise geometry, irrespective of the manufacturing scale required. The application of CAD and CAM to the manufacture of helicoidal surfaces as threads and their mated elements, together with their generating tools, is especially important in individual manufacture where the number of variants is high, and consequently the variety of tools required is high as well.