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DEA's CoOrdinate Measuring Machines Provide the Basis for Minimal Manned Automatic Inspection

DEA's CoOrdinate Measuring Machines Provide the Basis for Minimal Manned Automatic Inspection DEA's Co-Ordinate Measuring Machines Provide the Basis for Minimal Manned Automatic Inspection THE reduction of inspection times from hours to minutes has been achieved by Wolverhampton aerospace, maritime and defence industry systems manufac­ turer Dowty Boulton Paul, by siting its three DEA Iota computer controlled co-ordinate measuring machines on the shop floor as a production unit. The machines are an important step "Take the cost of waiting time for probe system which, with its program­ in the company's continuous programme first-off inspection on expensive CNC mable "wrist", enables development of of modernisation of its manufacturing machine tools — and you find the highly flexible probing routines. systems. By developing inspection pro­ benefits of using a CMM really became For Dowty, off-line programming grams off-line and siting the machines apparent," maintains David Nobes, will allow forward scheduling of the on the shop-floor, Dowty Boulton Paul Dowty's system engineer. "And, as we inspection process in line with produc­ is anticipating major overall reductions produce an increasing number of smaller tion requirements. Eventually, the three in non-productive machine hours. These batches to accommodate our Just-in- machines will be DNC linked to a have previously been unavoidable due Time philosophy, without our inspection central programming facility. Mean­ to first-off inspection cycles of 4 to 6 process under control there would be while, Dowty Boulton Paul will fully hours which can now be reduced to just more stoppages than machines running." develop the programs off-line using 15 to 20 minutes. solid model simulation of the inspection Improvements in accuracy and repeat­ cycle on a computer screen. ability are important to Dowty as well A post-processor link is under devel­ "Without our inspection as the logging and presentation of opment between the company's Schlum- process under control there information in a standard format. Each berger Technologies (Applicon) Bravo 3 would be more stoppages component has its own printed dimen­ computer aided design system and than machines running." sional report with a presentation and DEA's existing machine programming metrological analysis which is both software. This will theoretically permit faster and more flexible to attain. the CMM's to operate as minimally Dowty produces a wide variety of The decision to purchase three manned shopfloor inspection stations complex components machined to dimen­ machines was taken in early 1988 and a for automated inspection of one-off sional and spatial tolerances of 0.025 market survey was carried out. Three components. These will then be inte­ mm or better. Manual methods of companies were selected to perform grated into the company's statistical checking were long and complicated benchmark trials with Dowty looking process control network. and the repeatability between different for a capability for off-line programming. inspectors, because of the human ele­ It was DEA's capability in this respect ment, was unpredictable. Also, the time that led to two Iota 2203's and a single,- DEA (UK) Ltd., Terminal Three, spent in initial location and setting smaller, Iota 1203 being ordered. All 382, Stonehill Green, Westlea, Swin­ datums was long and tiresome. are equipped with the Renishaw PH9 don, Wilts. SN5 7HB. Tel 093 619577. AIRCRAF T ENGINEERING — September 1990 13 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

DEA's CoOrdinate Measuring Machines Provide the Basis for Minimal Manned Automatic Inspection

Aircraft Engineering and Aerospace Technology , Volume 62 (9): 1 – Sep 1, 1990

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb036991
Publisher site
See Article on Publisher Site

Abstract

DEA's Co-Ordinate Measuring Machines Provide the Basis for Minimal Manned Automatic Inspection THE reduction of inspection times from hours to minutes has been achieved by Wolverhampton aerospace, maritime and defence industry systems manufac­ turer Dowty Boulton Paul, by siting its three DEA Iota computer controlled co-ordinate measuring machines on the shop floor as a production unit. The machines are an important step "Take the cost of waiting time for probe system which, with its program­ in the company's continuous programme first-off inspection on expensive CNC mable "wrist", enables development of of modernisation of its manufacturing machine tools — and you find the highly flexible probing routines. systems. By developing inspection pro­ benefits of using a CMM really became For Dowty, off-line programming grams off-line and siting the machines apparent," maintains David Nobes, will allow forward scheduling of the on the shop-floor, Dowty Boulton Paul Dowty's system engineer. "And, as we inspection process in line with produc­ is anticipating major overall reductions produce an increasing number of smaller tion requirements. Eventually, the three in non-productive machine hours. These batches to accommodate our Just-in- machines will be DNC linked to a have previously been unavoidable due Time philosophy, without our inspection central programming facility. Mean­ to first-off inspection cycles of 4 to 6 process under control there would be while, Dowty Boulton Paul will fully hours which can now be reduced to just more stoppages than machines running." develop the programs off-line using 15 to 20 minutes. solid model simulation of the inspection Improvements in accuracy and repeat­ cycle on a computer screen. ability are important to Dowty as well A post-processor link is under devel­ "Without our inspection as the logging and presentation of opment between the company's Schlum- process under control there information in a standard format. Each berger Technologies (Applicon) Bravo 3 would be more stoppages component has its own printed dimen­ computer aided design system and than machines running." sional report with a presentation and DEA's existing machine programming metrological analysis which is both software. This will theoretically permit faster and more flexible to attain. the CMM's to operate as minimally Dowty produces a wide variety of The decision to purchase three manned shopfloor inspection stations complex components machined to dimen­ machines was taken in early 1988 and a for automated inspection of one-off sional and spatial tolerances of 0.025 market survey was carried out. Three components. These will then be inte­ mm or better. Manual methods of companies were selected to perform grated into the company's statistical checking were long and complicated benchmark trials with Dowty looking process control network. and the repeatability between different for a capability for off-line programming. inspectors, because of the human ele­ It was DEA's capability in this respect ment, was unpredictable. Also, the time that led to two Iota 2203's and a single,- DEA (UK) Ltd., Terminal Three, spent in initial location and setting smaller, Iota 1203 being ordered. All 382, Stonehill Green, Westlea, Swin­ datums was long and tiresome. are equipped with the Renishaw PH9 don, Wilts. SN5 7HB. Tel 093 619577. AIRCRAF T ENGINEERING — September 1990 13

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: Sep 1, 1990

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