Evaluation and comparison of a large machine tool structure with ISO standard alignment tests

A. Myers, S. M. Barrans, A. P. Longstaff, S. Fletcher, D. G. Ford

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In order to satisfactorily machine precision components it is necessary for machine tools to be able to achieve extremely high levels of geometric accuracy. This requires their structures to be extremely rigid such that deflections caused by self weight and traversing of the moving elements do not induce distortions that exceed the required tolerances of the components which are manufactured by the machines. To aid this aspect of machine tool technology, a range of standards have been systematically created which specify in great detail a variety of geometric tests which can be applied to the various configurations of machine tools currently in use today. Certain machine tool companies will use national or ISO standards, others will create their own, often based upon the ISO but tailored to suit their specific machine configuration and characteristics. However, achieving the required tolerances can be extremely difficult due to a number of reasons such as geometric errors, thermal distortions causing errors to change as temperatures change and load errors causing the errors to change due to the variation in load magnitude and the changes in positions of the loads. One major source of load errors on large machine is caused by the machine's own weight and its re-distribution as the machine is traversed through its own working stroke, whereas another significant source is caused by the variety in component weights and their variation in position, either on static or moving table machines. In some cases the tolerances specified in standard tests can be tighter than grade "A" straightedge tolerances and achieving this accuracy under conditions which apply to large and heavy machine tool installations can cause significant problems and considerable unanticipated costs. A review is made here of how these difficulties might be overcome by use of modern technology and adopting the outlined planned approach to the design and build procedure used of large and heavy machine tools.

Original languageEnglish
Title of host publicationLaser Metrology and Machine Performance IX
Subtitle of host publication9th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, LAMDAMAP 2009
EditorsK. Cheng
Publishereuspen
Pages57-66
Number of pages10
ISBN (Print)9780955308277
Publication statusPublished - 1 Jun 2009
Event9th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance - Uxbridge, United Kingdom
Duration: 30 Jun 20092 Jul 2009
Conference number: 9

Conference

Conference9th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance
Abbreviated titleLAMDAMAP 2009
CountryUnited Kingdom
CityUxbridge
Period30/06/092/07/09

Fingerprint

machine tools
Machine tools
alignment
evaluation
geometric accuracy
Exercise equipment
configurations
strokes
installing
deflection
grade
costs
causes
Costs
Industry

Cite this

Myers, A., Barrans, S. M., Longstaff, A. P., Fletcher, S., & Ford, D. G. (2009). Evaluation and comparison of a large machine tool structure with ISO standard alignment tests. In K. Cheng (Ed.), Laser Metrology and Machine Performance IX : 9th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, LAMDAMAP 2009 (pp. 57-66). euspen.
Myers, A. ; Barrans, S. M. ; Longstaff, A. P. ; Fletcher, S. ; Ford, D. G. / Evaluation and comparison of a large machine tool structure with ISO standard alignment tests. Laser Metrology and Machine Performance IX : 9th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, LAMDAMAP 2009. editor / K. Cheng. euspen, 2009. pp. 57-66
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Myers, A, Barrans, SM, Longstaff, AP, Fletcher, S & Ford, DG 2009, Evaluation and comparison of a large machine tool structure with ISO standard alignment tests. in K Cheng (ed.), Laser Metrology and Machine Performance IX : 9th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, LAMDAMAP 2009. euspen, pp. 57-66, 9th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, Uxbridge, United Kingdom, 30/06/09.

Evaluation and comparison of a large machine tool structure with ISO standard alignment tests. / Myers, A.; Barrans, S. M.; Longstaff, A. P.; Fletcher, S.; Ford, D. G.

Laser Metrology and Machine Performance IX : 9th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, LAMDAMAP 2009. ed. / K. Cheng. euspen, 2009. p. 57-66.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Myers A, Barrans SM, Longstaff AP, Fletcher S, Ford DG. Evaluation and comparison of a large machine tool structure with ISO standard alignment tests. In Cheng K, editor, Laser Metrology and Machine Performance IX : 9th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, LAMDAMAP 2009. euspen. 2009. p. 57-66