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Research Papers

A Portrait of an ISO STEP Tolerancing Standard as an Enabler of Smart Manufacturing Systems

[+] Author and Article Information
Allison Barnard Feeney

Systems Integration Division,
Engineering Laboratory,
National Institute of Standards and Technology,
Gaithersburg, MD 20899
e-mail: allison.barnardfeeney@nist.gov

Simon P. Frechette

Systems Integration Division,
Engineering Laboratory,
National Institute of Standards and Technology,
Gaithersburg, MD 20899
e-mail: simon.frechette@nist.gov

Vijay Srinivasan

Fellow ASME
Systems Integration Division,
Engineering Laboratory,
National Institute of Standards and Technology,
Gaithersburg, MD 20899
e-mail: vijay.srinivasan@nist.gov

Contributed by the Computers and Information Division of ASME for publication in the JOURNAL OF COMPUTING AND INFORMATION SCIENCE IN ENGINEERING. Manuscript received September 30, 2014; final manuscript received October 27, 2014; published online April 8, 2015. Editor: Bahram Ravani.This material is declared a work of the U.S. Government and is not subject to copyright protection in the United States. Approved for public release; distribution is unlimited.

J. Comput. Inf. Sci. Eng 15(2), 021001 (Jun 01, 2015) (5 pages) Paper No: JCISE-14-1311; doi: 10.1115/1.4029050 History: Received September 30, 2014; Revised October 27, 2014; Online April 08, 2015

The International Organization for Standardization (ISO) has just completed a major effort on a new standard ISO 10303-242 titled “Managed Model Based 3D Engineering.” It belongs to a family of standards called STEP (STandard for the Exchange of Product model data). ISO 10303-242 is also called the STEP Application Protocol 242 (STEP AP 242, for short). The intent of STEP AP 242 is to support a manufacturing enterprise with a range of standardized information models that flow through a long and wide “digital thread” that makes the manufacturing systems in the enterprise smart. One such standardized information model is that of tolerances specified on a product’s geometry so that the product can be manufactured according to the specifications. This paper describes the attributes of smart manufacturing systems, the capabilities of STEP AP 242 in handling tolerance information associated with product geometry, and how these capabilities enable the manufacturing systems to be smart.

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References

Figures

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Fig. 1

An example of standardized presentation of PMI on a 3D model [4]

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Fig. 2

A partial, hierarchical enabler diagram

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Fig. 3

An illustration of the contents of ISO STEP AP 242 (from Ref. [10])

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Fig. 4

A pictorial view of the roles, dependencies, and lags in the three PMI standards development processes

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Fig. 5

Definition of the syntax and semantics of flatness tolerance by ISO TC 213 [16]

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Fig. 6

Definition of the syntax and semantics of flatness tolerance by ASME Y14.5 [17]

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