Présentation de l'éditeur
Much descriptive matter has already been written on the details of the various inspection methods employed in different engineering works, but the object of this work is to present to the reader, in a compact and convenient form, a description of the various principles involved in the inspection of an engineering job from the raw material to the finished article. It is obviously impossible to go fully into detail in each case, nor is it necessary to do so. Every engineer and manager has different problems to face, but if he has a thorough grasp of the principles required for their solution, it is not usually difficult to work out the necessary details. The examples given are chosen to be representative (as far as possible) of general engineering practice and to illustrate the different principles of inspection and measurement in common use. From considerations of space, mechanical engineering operations only are described, as the special apparatus and methods used in electrical and civil engineering are too numerous and varied to be included in any work of reasonable size.
It frequently happens that the works inspector touches only one or two particular processes or operations, and it is highly desirable that he should have some idea of the work done before the material reaches him, and to be done after it leaves his hands. He is thus enabled to do his own work more intelligently, to avoid bad workmanship and unnecessary scrap, and to fit himself for the higher branches of his profession.
It is hoped also that this work will be useful to engineers and draughtsmen, by indicating what information is necessary on working drawings, how such information is used in the shops, and by giving assistance in specifying material or machinery and indicating the defects that are likely to be encountered in different cases.
All branches of engineering science are to a certain extent interdependent, and acquaintance with any one section is frequently useful to those who are occupied in others.
Tags: inspection test gauges material steel tests machine castings gauge engineering cent diameter testing tensile iron strength water pressure number inspector
Category: Technology and Engineering - General
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