Computer Aided Design of Mechanical ProductsJay McCormackAssistant Professor10-6-11FACTS!Computers perform operations quickly and repeatedly.FACTS!Computers perform operations quickly and repeatedly.Our ‘relationship’ with computing is more commonplace than ever.FACTS!But! Computers are not helping us design like we hoped they would.Computers are helping us draw.But! Computers are not helping us design like we hoped they would.Computers are helping us draw.That’s our research area!Why?1. commercialization and history2. design processNotes!!!!Notes!!!!CAD is awesome!Notes!!!!CAD is awesome!Mechanical and electrical CAD are very different because of different products.Notes!!!!CAD is awesome!Mechanical and electrical CAD are very different because of different products.Electrical design automation research has inspired much of mechanical design automation research.Commercialization and HistoryHistory of CAD ToolsHistory of CAD ToolsEuclid - Core geometric relationshipsHistory of CAD ToolsEuclid - Core geometric relationships1960’s - Auto/aero/academic early investigation 21-18 Rev 1 September 2008 © 2008 David E. Weisberg Figure 22.4 CalComp System 25 The management staff in mid-1985 consisted in part of: x William Conlin – president of CalComp Computer Products x Louis DeBartolo – vice president and general manager of CalComp Systems x William O’Brien – group vice president, marketing and sales x Jim Gowan – vice president and general manager, international x Doyle Cavin – vice president, technology x Joe Fornataro – vice president, system sales x Warren Winterbottom – vice president, OEM product sales (previously vice president of marketing for the Systems division) Conlin eventually joined SDRC’s board of directors after retiring from CalComp. O’Brien15, Gowan and Cavin were all former Tektronix executives while Winterbottom went on to work for both Intergraph and Bentley Systems. CalComp Systems never had much more than about $30 million in annual revenues. In mid-1985, the CalComp Systems Division of Sanders Associates acquired the CADplan software product line from Personal CAD Systems (P-CAD) for $7.5 million and renamed it CADVANCE. This software initially sold for $2,500 per copy. The acquisition did not go well and Sanders sued P-CAD for $22 million claiming that the company had misled it about the financial health of its AEC business prior to the acquisition.16 A major problem that CalComp faced trying to sell CAD systems and software was that it competed with turnkey CAD systems vendors who were some of CalComp’s largest customers for plotters and other peripheral devices. Sanders Associates was acquired in 1986 by Lockheed which also owned CADAM, Inc. When Lockheed ran into it own financial problems, it sold off several divisions including CADAM. It was expected that CalComp was also going to be sold 15 Bill O’Brien was my boss at Tektronix in the late 1970s. 16 The lawsuit was settled in 1987 but the terms were not disclosed.History of CAD ToolsEuclid - Core geometric relationships1960’s - Auto/aero/academic early investigation1970’s - Internal CAD develop, commercialization 21-14 Rev 1 September 2008 © 2008 David E. Weisberg An article in the April 2002 issue of Modern Machine Shop described one project where Cimskil was used to program a 5-axis machine tool for a set of parts that had previous been done on 3- and 4-axis machines. The results were impressive. Working with Cimskil, the part programming took from a third to a tenth of the time compared to conventional NC part programming and production time was also a half or less of the previously recorded time.11 Much of the software development was done under contract to the U.S. Department of Defense which was interested in being able to rapidly produce aircraft spare parts. BruningCAD Bruning was a division of AM International that sold engineering supplies and reproduction equipment. In April 1981 it began selling a low-cost drafting system called Easydraf2 that was based on two-dimensional drafting software licensed from Graphcon. A complete system, which sold for $69,500, included a Hewlett-Packard 9845B desktop computer with a 13-inch raster display.12 This was subsequently replaced by HP 9000 Series 200 computers with either a 9-inch or 12-inch color display. Graphcon was started in 1977 by Livingston Daniels in Tulsa, Oklahoma. Its Easydraf software was available on Tektronix 4050 graphic systems as well as the HP 9800 series. AM International acquired Graphcon in July 1983 and Daniels became president and CEO of the renamed BruningCAD. In September 1983, Lou Epstein who had previously been with Tektronix and Intergraph, joined as vice president of sales and marketing. Figure 21.3 BruningCAD Easydraf2 System During the next several years, BruningCAD developed its own workstation built around a Motorola 68000 microprocessor, a 19-inch 16-color 1024x768 display and a 11 Zelinski, Peter, “Empowering the Programmer”, Modern Machine Shop, April 2002 12 The Low Cost CAD/CAM Systems Market, International Data Corporation, May 1982, Pg. 36History of CAD ToolsEuclid - Core geometric relationships1960’s - Auto/aero/academic early investigation1970’s - Internal CAD develop, commercialization1980’s - Commercial CAD tools, fast computers 21-14 Rev 1 September 2008 © 2008 David E. Weisberg An article in the April 2002 issue of Modern Machine Shop described one project where Cimskil was used to program a 5-axis machine tool for a set of parts that had previous been done on 3- and 4-axis machines. The results were impressive. Working with Cimskil, the part programming took from a third to a tenth of the time compared to conventional NC part programming and production time was also a half or less of the previously recorded time.11 Much of the software development was done under contract to the U.S. Department of Defense which was interested in being able to rapidly produce aircraft spare parts. BruningCAD Bruning was a division of AM International that sold engineering supplies and reproduction equipment. In April 1981 it began selling a low-cost drafting system called Easydraf2 that was based on two-dimensional drafting software licensed from Graphcon. A complete system, which sold for $69,500, included a Hewlett-Packard 9845B desktop computer with a 13-inch raster display.12 This was subsequently replaced by HP 9000 Series 200 computers