perm filename PROP4C[1,VDS]1 blob sn#081096
filedate 1974-01-10 generic text, type T, neo UTF8
00100 A DISSERTATION PROPOSAL
00300 An Automated Sheet Metal Shop
00500 Sheet metal fabrication has long been considered a hard to
00600 automate field because of the types of machines used and the need to
00700 do a lot of manipulating of material, which can frequently be large
00800 floppy sheets of varying thickness, yield strength and stock
00900 dimension. For prototype manufacture, the setup time of each cutting,
01000 notching, punching, bending or spot welding operation represents
01100 almost the entire cost of manufacture. Automation of these processes
01200 has been limited to numerically controlled (n.c.) punches and n.c.
01300 stops on hand fed shears. True automation has been accomplished only
01400 in very high production runs using special purpose dies in cascaded
01500 blanking and stamping transfer presses to replace the traditional
01600 short run methods.
01800 I propose to study and design an automated design and
01900 manufacturing system consisting of an interactive graphics display
02000 terminal, a large timeshare computer, a design automation program, a
02100 manufacturing planning program, a manufacturing execution program,
02200 and a totally automated manufacturing facility containing a
02300 collection of computer controlled sheet metal working machines and
02400 one or more computer controlled manipulators to set up the machines
02500 and perform all the necessary manipulation of the sheet material.
02700 To demonstrate the completeness of the design study, I also
02800 propose to develop and assemble a demonstration fully autometed
02900 prototype part sheet metal fabricating shop.
03100 To execute this ambitious project, I will develop new
03200 programs and will utilize existing programs and routines to create a
03300 complete chain of automation. More specifically, I will take existing
03400 and shortly forthcomming rapid geometric design (GEOMED) programs and
03500 will develop new monitor routines to provide interactive design
03600 assistance reflecting the manufacturability of a particular design,
03700 as it is being designed. I will also develop a program to interpret
03800 the completed design in terms of manufacturing operations. This
03900 manufacturing planning program would have as its inputs the design,
04000 the materials available, and the machines available. The output will
04100 be a set of instructions detailing each operation required to make
04200 the part. Completing the entire system, I will work to develop a set
04300 of computer controlled machines and a manipulator with a suitable
04400 grasping device to handle the material and operate the machines.
04500 Along with this hardware setup, I plan to develop a workable
04600 execution program which would properly interpret the planning
04700 program's output in terms of machine and manipulator commands.
04900 To make the scope of this project realistic from a standpoint
05000 of both actually working, and being completed in a reasonable period
05100 of time, I propose to limit the acceptable design to sheet aluminum
05200 chassis and boxes of a generally regular shape. Included in this
05300 category would be degenerate shapes, such as brackets and sections
05400 with simple hole patterns and bends.
05600 Coupled with this programming effort and hardware
05700 development project, will be a study of new technology and new
05800 approaches to the execution of some traditional problems. As an
05900 example, laser cutting of cloth is in industrial use now, and its
06000 implications for use in the sheet metal cutting , shaping and forming
06100 field are obvious. Electromagnetic, impact, and explosive forming are
06200 other areas where new automatic planning , control and execution
06300 methods can put laboratory demonstrated techniques into a realistic
06400 and viable place in industry.