WHEN Dunlop Aviation adopted a new CNC programming system for its 1850-strong factory in Coventry, it had to find one which could meet its CADCentre particularly stringent requirements. Three CADCentre products in combina tion exactly fitted the bill — DIAD, GNC and GNC-POST. Software Meets Dunlop Aviation is one of only five companies in the world specialising in aircraft wheels and brakes, and the Aeroplane Brake range of aircraft fitted includes Concorde, BAe 146, EAP and ATP, McDonnell Douglas AV8B Harrier GRMKV and Boeing 757 and specified for the ATR Manufacturer 72. Precision engineering right through from design to manufacture, assembly and testing is vital: whereas car brakes Stringent must absorb energy at the rate of around 50 hp, each one of Concorde's eight carbon brakes has to absorb 8000 hp on landing. Requirements The production area at Dunlop boasts over 300 machine tools with 33 of these being fitted with controllers (such as GE, Kongsberg, Fanuc and AB) and all had to be regulated by the new programming system. and tool design requirements; GNC- flexible tool with rapid editing and Two obvious requirements for the checking facilities. POST was seen as the ideal package for new CNC programming system were CNC machine down time has been generation of post processors quickly graphics and interactivity. But there and accurately from the GNC data. drastically reduced. And, as Dunlop were others to get away from custom- now has total control over the creation All the products were seen to be 'user written software and be independent in and modification of geometry for com friendly', offering extensive use of terms of NC programs and post proces ponents, jigs and fixtures, they are able menus and help facilities. The robust sors; to improve NC tape output (with a to produce part programmes and post links between DIAD and GNC and consequent reduction in down time); processors for their whole range of CNC between GNC and GNC-POST were and an ongoing need to be able to machines. definite advantages. They could enable address an increasing range of ever engineers to quickly transfer design One unforeseen benefit has been the more sophisticated machine tools and data. use of DIAD to draw and update plant controllers. layout. The whole factory layout has Dunlop investigated a number of Made the choice been entered into the system, and now systems from several companies before Having made its choice, Dunlop certain areas can be looked at in detail finally choosing DIAD (for jig and tool purchased the first workstation in and various options for alteration can be design), GNC (for part programming) November 1984. Since then, six addi viewed quickly. and GNC-POST (for post processor tional workstations, a plotter for hard During 1986 the Dunlop Design generation) — all of which are produced copy, extra disc capacity and a tape Office also set out to choose a CAD by CADCentre. facility for back ups have been added. system for itself. The full specifications GNC met the major requirement for CADCentre software has also been in fact, called for a CADCAM package, an NC part programming package ordered for three more workstations, to and it was felt that if a suitable one could which would enable Dunlop to address be installed in 1988. The growth of the be found, then the Production Engine a wide range of machining disciplines. system reflects the confidence that ering Department would have to adopt On the CAD side, DIAD addressed jig Dunlop has in CADCentre's ability not the CAM element of the new system. only to support the software well but During subsequent investigations it also to maintain a high level of product became clear that no other CAD enhancement. package had a CAM offering as good as The October issue of CADCentre's GNC. They purchased it As a result of the CADCentre 'Aircraft Engineering and as a consequence, their requirement purchases, Dunlop now enjoys a number has changed so that they now demand of benefits: the use of a graphical system and Aerospace Technology' that any new CAD system selected which enables the production engineer will feature: should either interface to GNC or be to 'see' the whole machine environment Engine Parts, capable of being interfaced to GNC! and eliminate collisions and poor tool Components and selection. The result is virtually error- free tape production. The use of GNC- CADCentre Ltd, High Cross, Accessories POST to produce the post processors Madingley Road, Cambridge CB3 gives Dunlop a very powerful, very 0HB. Tel: 0223 314848. AIRCRAFT ENGINEERING — September 1989 21
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Sep 1, 1989
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera