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Technical Paper

Assembly Fixture for 787 Section 11, Heavy Composite Assembly

2007-09-17
2007-01-3869
The 787 Section 11 Assembly Cell is a combination fixed post and moving frame holding and indexing system, designed to determinately build the 787 Section 11 Wing box. The retractable overhead frame allows maximum clearance for safer and faster loading and unloading of component parts, as well as completed wingbody sections. Additionally, each index is also retractable allowing maximum fastener access inside the jig.
Technical Paper

Evaluation of the EMR for Swaging Collars on Advanced Composite Laminates

2005-10-03
2005-01-3299
The Boeing 787 Dreamliner will be the most fuel-efficient airliner in the world when it enters service in 2008. To help achieve this, Boeing will utilize state-of-the-art carbon fiber for primary structures. Advanced manufacturing techniques and processes will be used in the assembly of large composite structures. Electroimpact has proposed a system utilizing the low recoil Low Voltage Electromagnetic Riveter (LVER) to drill and install bolts. A test program was initiated between Boeing Materials Process and Engineering (MP&E) and Electroimpact to validate the LVER process for swaging titanium collars on titanium pins in composite material. This paper details the results of these tests.
Technical Paper

Wing Assembly System for British Aerospace Airbus for the A320

1998-09-15
982151
British Aerospace needed an automated wing riveting system for fastening the A320 wing sections. The E4000 Wing Riveting System was designed and installed at their Airbus factory in Chester, UK and is now in production. It uses a five axis solid yoke with workheads on each end of the yoke. It accurately installs both rivets and lockbolts over the entire wing panel, including offset areas.
Technical Paper

Wing Manufacturing: Next Generation

1998-07-31
985601
Due to the part size and technological limitations of the available assembly equipment, traditional wing manufacturing has consisted of a three stage process. Parts are first manually tacked together in an assembly jig, They are then removed from the jig, rotated horizontally and craned into an automated fastening machine. Finally they are removed from the fastening machines and craned to a third station where the manual tacks are removed and the parts are prepped for final wing box assembly. With the advent of electromagnetic riveting (EMR) and the traveling yoke assembly machine this traditional approach has been replaced with single station processing. Wing panels and spars can now be automatically tacked together under continuous clamp up in their assembly jigs using EMR. This eliminates the requirement for disassembly, debur and cleaning required with the manual process.
Technical Paper

Benefits of Concurrent Engineering

1993-09-01
931765
For seven years Electroimpact, Inc. has been providing manufacturing equipment to the aerospace assembly business. Our industry is not partial toward working with small companies such as Electroimpact. But we fill a niche. The niche which we fill is in the area of new processes. We have developed new processes which have made inroads into the industry. This paper will review a number of case studies for the implementation of new manufacturing technology in the aerospace industry. In all of these cases motivation for the implementation of new technology is the driving force and concurrent engineering is the vehicle for successful implementation. Although this review is only cursory it can provide a reference to help you make further inquiries.
Technical Paper

Process Development for Use of AERAC

1991-11-01
912650
Two Automated Electromagnetic Riveting Assembly Cells (AERAC) were manufactured for Textron Aerostructures by Electroimpact, Inc. The AERAC installs the final rivets in the A330/A340 upper wing panel in the floor assembly jig. At Textron for each wing the corresponding floor assembly jigs for each wing are lined up end to end. An operating procedure in which the formboards are removed in bays allows efficient operation of an in the jig riveter such as the AERAC. Specialized machine codes developed for the AERAC allows quick fully programmed stringer to stringer jumps of the stringer side offset tooling. The AERAC is programmed entirely from a CATIA drawing of the part. Of the 5 axes of rivet data available only two are retained for use by the AERAC.
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