The book presents research that was undertaken to minimize e expenditure and effort in construction
for the building of an efficient power hammer. The resultant machine worked well without
modification except for re- mounting of the anvil. The book is organized thus:
to facilitate decisions in design that should and to lead to simplicity and economy and to make it easy to
appreciate the effects of departures from ideal values of the parameters,
to permit a design to be started from any of a number of fixed choices, for example: for a given hammer
head mass, or for a given spring, or for a given crank radius, or for a given motor power, and
To illustrate the appliction of the research and analysis in the design of a particular machine.
There are a few mathematical expressions in the text, to assist the interested
reader to understand how the results were obtained. The reader who is
not familiar with the notation should be able to ignore these without losing the flow of the discussion.
Different readers will find different parts of the book of more or less interest.
not familiar with the notation should be able to ignore these without losing
the flow of the discussion.
A reader interested particularly in designing a machine might well look at the following first:
Chapters 3 SPRING HAMMER SPRING SYSTEMS, 6 DESIGN EXAMPLES, 7 CONTROL METHODS and
11 CONCLUSIONS; DESIGN PROCEDURE. In Chapter 8 SPRING DESIGN AND SELECTION there may
be only one section of relevance after the designer has chosen a spring form of interest. To illustrate
the application of the design principles, Chapter9 EXAMPLE OF A PRACTICAL DESIGN
describes salient features of a spring hammer that was built using these principles.
Chapter 4 ASSUMPTIONS AND SIMULATION METHODS might be of interest to those who want to
understand details of how the results were obtained, but probably does not contribute greatly to what
one needs to know for using the results.
Chapter 5 EFFECTS OF SYSTEM PARAMETERS
presents results of the author's research, and is the basis for most of the design guidance that is summarized
in other chapters.