Newly Revised ANSI B11.3-2012 Standard for Machine Safety Requirements for Power Press Brakes Now Available from Omron Automation and Safety
OMRON Automation and Safety Posted 10/30/2012
Standards Update from Omron Automation and Safety
The newly revised standard, “ANSI B11.3-2012 American National Standard for Machines – Safety Requirements for Power Press Brakes,” is published and now available from Omron Automation and Safety at www.sti.com/ansi.
New topics included in this revision are the ‘close proximity point of operation AOPD’ safeguarding devices, and a means of safeguarding referred to as ‘Safe Speed.’ In addition, this revision incorporates the B11 Accredited Standards Committee’s ‘FASTT’ initiative which defines common language to be used by the entire series of ANSI B11 standards. Consequently, many definitions of common terms contained in the previous edition of B11.3 can be now be found in the ANSI B11.0 and ANSI B11.19 standards. This initiative also significantly impacts clauses 4, 5, 7, 9, and adds a brand new clause 10 and Annex I on training.
The 2012 standard was revised by the B11.3 Subcommittee and approved by the B11 Accredited Standards Committee for submittal to the ANSI Executive Standards Council as an American National Standard. The standard was then approved by the American National Institute on July 20, 2012.
The requirements of this standard apply to those machines classified as power press brakes (referred to simply as “press brakes”), which are designed and constructed for the specific purpose of bending metal. To achieve this purpose, the press brake is provided with a plate-type ram and a plate-type bed with provisions for attaching standardized press brake tooling. When used for operations other than bending material, other standards may provide additional information and requirements for the specific use or application.
The original B11.3 standard was approved in 1973 and revised in 1982 and again in 2002. In the 2002 document, powered folding machines were included in the scope of the standard because they were similar to press brakes in that they are metal bending machines and they were not covered by any other standard. During the current revision process, the subcommittee determined that powered folding machines have evolved into multi-axis machines that process metal in numerous ways, many of which are unlike a press brake.
Additionally, there is now a type-A standard, ANSI B11.0, which can be used in conjunction with the type-B standard ANSI B11.19 to provide guidance for the safe use of machines in general. It is for these reasons that the subcommittee decided to exclude powered folding machines in the scope of the 2012 ANSI B11.3 standard.
In 2008 ANSI B11 was published, later renumbered B11.0, with the long term objective to reorganize the B11 family of standards by gathering the requirements common to many or most of the B11 standards into a single document while retaining the machine tool specific requirements in the machine-specific standards. This B11.3 standard is intended to be used with ANSI B11.0 and ANSI B11.19. The requirements of all three standards must be met as applicable to a particular machine.
The B11 standards for machine tools were first approved beginning with safety requirements for power presses in 1922. Since that time, safety requirements for a variety of machine tools have been developed and continually updated and revised to become a series of some 30 B11 standards and technical reports.
Organization and Application of B11 Series of Documents
The B11 series of documents can be associated with the ISO “Type A-B-C” structure as described below:
- Type-A standards (basis standards) give basic concepts, principles for design, and general aspects that can be applied to machinery;
- Type-B standards (generic safety standards) deal with one or more safety aspects or one or more types of safeguards that can be used across a wide range of machinery:
- Type-C standards (machinery safety standards) deal with detailed safety requirements for a particular machine or group of machines.
This ANSI B11.3 standard on power press brakes is a “Type-C” standard. The ANSI B11.0 standard on general safety requirements common to ANSI B11 machines is primarily a “Type-A” standard in that it applies to a broad array of machines and contains very general requirements. However, in many areas it also contains very specific requirements. B11.19, B11.20 and the B11 series Technical Reports are all typical “Type-B” documents addressing general safety elements that can be applied across a wide range of machinery (B11.19) or as a standard when combining machines (B11.20). The B11 series of Technical Reports are informative documents that may be generally applied to many machines and as such would fall into the “Type-B” group.
The machine-specific (Type-C) B11 standards contain detailed safety requirements for a particular machine or group of machines, such as in the case of this standard. The B11.0 and the machine-specific B11 standards are intended to be used concurrently by the supplier and user of machines. When a Type-C standard deviates from one or more provisions dealt with by this standard or by a Type-B standard, the Type-C standard requirement generally takes precedence. Any deviation in conforming to a requirement of any standard should be carefully evaluated and based on a documented risk assessment.
About Omron STI
Omron Scientific Technologies, Inc. (STI) is a leading brand of automation safeguarding products and services available worldwide from Omron Automation and Safety. Omron STI safety products and integration services are used to protect workers around machinery, automated equipment and industrial robots in a wide variety of applications and markets including semiconductor, automotive, medical, electronics manufacturing, packaging and consumer markets. They partner with globally recognized and proven Omron automation platform products to deliver solutions that integrate logic, motion, and vision for complete machine and production control. The Omron Automation and Safety headquarters for Pan America is located in Schaumburg, Illinois USA.