perm filename PROP[1,VDS]2 blob
sn#101297 filedate 1974-05-03 generic text, type C, neo UTF8
COMMENT ā VALID 00002 PAGES
C REC PAGE DESCRIPTION
C00001 00001
C00002 00002 A DISSERTATION PROPOSAL
C00008 ENDMK
Cā;
A DISSERTATION PROPOSAL
An Automated Sheet Metal Shop
Sheet metal fabrication has long been considered a hard to
automate field because of the types of machines used and the need to
do a lot of manipulating of material, which can frequently be large
floppy sheets of varying thickness, yield strength and stock
dimension. For prototype manufacture, the setup time of each cutting,
notching, punching, bending or spot welding operation represents
almost the entire cost of manufacture. Automation of these processes
has been limited to numerically controlled punches and stops on hand
fed shears. True automation has been accomplished only in very high
production runs using special purpose dies in cascaded blanking and
stamping transfer presses to replace the traditional short run
methods.
I propose to study and assemble an automated design and
manufacturing system consisting of an interactive graphics display
terminal, a large timeshare computer, a design automation program, a
manufacturing planning program, a manufacturing execution program,
and a totally automated manufacturing facility containing a
collection of computer controlled sheet metal working machines and
one or more computer controlled manipulators to set up the machines
and perform all the necessary manipulation of the sheet material.
To execute this project, I will develop new programs and will
utilize existing programs and routines to create a complete chain of
automation. More specifically, I will take existing and shortly
forthcomming rapid geometric design (GEOMED) programs and will
develop new monitor routines to provide interactive design assistance
reflecting the manufacturability of a particular design, as it is
being designed. I will also develop a program to interpret the
completed design in terms of manufacturing operations. This
manufacturing planning program would have as its inputs the design,
the materials available, and the machines available. The output will
be a set of instructions detailing each operation required to make
the part. Completing the entire system, I will work to develop a set
of computer controlled machines and a manipulator with a suitable
grasping device to handle the material and operate the machines.
Along with this hardware setup, I plan to develop a workable
execution program which would properly interpret the planning
program's output in terms of machine and manipulator commands.
To make the scope of this project realistic from a standpoint
of both actually working, and being completed in a reasonable period
of time, I propose to limit the acceptable design to sheet aluminum
chassis and boxes of a generally regular shape. Included in this
category would be degenerate shapes, such as brackets and sections
with simple hole patterns and bends.
Coupled with this programming effort and hardware
development project, will be a study of new technology and new
approaches to the execution of some traditional problems. As an
example, laser cutting of cloth is in industrial use now, and its
implications for use in the sheet metal cutting , shaping and forming
field are obvious. Electromagnetic, impact, and explosive forming are
other areas where new automatic planning , control and execution
methods can put laboratory demonstrated techniques into a realistic
and viable place in industry.