United States
United States

Time filter

Source Type

Cemenska J.,Electroimpact Inc.
SAE Technical Papers | Year: 2011

Electroimpact Automatic Fiber Placement (AFP) machines lay-up composite parts by accurately placing carbon fiber tow (strips of impregnated carbon fiber) on a mould. In order to achieve high accuracy at high speeds, the processes of feeding and cutting tows must be tuned. Historically, the tuning has been a time-consuming, manual process. This paper will present a methodology to replace manual measurements with an automated laser, improve measurement speed by an order of magnitude, improve accuracy from +/- 0.020 (manual) to +/- 0.015 (laser), and eliminate human error. Copyright © 2011 SAE International.


Devlieg R.,Electroimpact Inc.
SAE International Journal of Aerospace | Year: 2011

The processes of drilling and milling Boeing 737 inboard flaps at Triumph Aerostructures have been enhanced by an accurate articulated robotic system. Tool point positioning is handled by an off-the-shelf 6-axis KUKA KR360 robot riding on a linear axis. Each of the 7 axes is enhanced with secondary position encoders. A single process head performs all required functions, including one-sided pressure application, touch probing, barcode scanning, drilling/countersinking, measurement of hole diameter and countersink depth, and face milling. The system is controlled by a Siemens 840Dsl CNC which handles all process functions, robot motion, and executes software technologies developed for superior positional accuracy including enhanced kinematics, automated normality correction, and anti-skid correction. The layout of the assembly cell allows the robot to span four fixture zones. Part programs are generated offline in the Catia environment using an offline programming and simulation package. © 2011 SAE International.


Jeffries K.A.,Electroimpact Inc.
SAE International Journal of Aerospace | Year: 2013

The process of robotic automated fiber placement has been enhanced by combining the technologies of an accurate articulated robotic system with a modular Automated Fiber Placement (AFP) head. The accurate robotic system is comprised of an off-the-shelf 6-axis KUKA Titan KR1000L750 riding on a linear axis with an option for an additional part rotator axis. Each of the robot axes is enhanced with secondary position encoders. The modular fiber placement head features a robotic tool changer which allows quick-change of the process heads and an onboard creel. The quick-change fiber placement head and simplified tow path yields terrific process reliability and flexibility while allowing head preparations to occur offline. The system is controlled by a Siemens 840Dsl CNC which handles all process functions, robot motion, and executes software technologies developed by Electroimpact for superior positional accuracy including enhanced kinematics utilizing a high-order kinematic model. Part programming and simulation are performed offline using CGTech VERICUT Composite Programming and VERICUT Composite Simulation. This combination of technologies results in a system that has high path accuracy and process flexibility at a lower cost than traditional fiber placement machines. Copyright © 2013 SAE International.


Brown C.,Electroimpact Inc.
SAE Technical Papers | Year: 2012

Flex Track Drilling systems have been successfully implemented into several production environments and scenarios over the past couple of years. They continue to see a high demand where traditional machine tool implementations might be prohibitive due to cost or existing jig structures. This demand for innovation has led to a unique Flex Track design termed an Offset Flex Track that not only works between the vacuum rails, but can work beyond the envelope of the rails. This allows the machine to be used in situations such as the leading edge of wings where the vacuum rails cannot straddle the work envelope. The next evolution of this Offset machine is the introduction of final fastener installation onto the head using an onboard rivet gun. In addition, the camera used to locate datum points on the fuselage is now integrated into the nose piece, eliminating the need for a tool change to a spindle mounted camera. The next generation of Flex Track machines will continue to push the boundary of lightweight, portable automation solutions in the aerospace manufacturing environment. Copyright © 2012 SAE International.


Patent
Electroimpact Inc. | Date: 2012-12-28

A machine includes a feed system for moving fasteners to a track-type fastener injector system and a pusher for moving the fasteners along the track. A rivet ejector assembly comprises a pair of bombay-type doors which support a portion of the track feed system and a mechanism for recognizing misfed rivets as they approach the bombay doors. The bombay doors are rotated about their longitudinal axes so that opposing inner surfaces of the bombay doors pivot away from each other, along with the track portion, permitting the fastener to fall or be blown therethrough, ejected from the injector system.


Patent
Electroimpact Inc. | Date: 2014-09-19

The system includes a ram assembly with fingers for grasping a fastener. An actuator moves the ram assembly toward the workpiece, under machine control. A housing member which is movable by the actuator includes a holding member for an anvil portion of the ram assembly, the holding member being movable within the housing member. The holding member and the housing member are arranged so there is a selected air gap between the movable member and the top of the housing at the start of the fastener cycle. An insertion sensor assembly changes signal state when the air gap begins to close. When the air gap begins to close either too early or too late relative to a properly positioned fastener, the actuator is stopped by the cycle motion controller.


The system includes a moving feed assembly through which a collar is moved by compressed air to a position in substantial alignment with the centerline of a swaging die assembly. Two spring-loaded fingers are mounted on opposing sides of the feed assembly for receiving the collar by compressed air action where it is maintained in substantial alignment with the swaging die assembly. The spring action of the fingers is strong enough that the collar can be pressed firmly against a curved receiving portion of the fingers by the compressed air. A die pin portion of the swaging die is then inserted into the collar, thereafter maintaining the position of the collar as the feed assembly with the opposing fingers are stripped away from the collar, leaving the die pin-engaged collar free to be moved by action of a ram assembly to a stackup of parts to be fastened, where the collar can be transferred onto a bolt which extends through the stackup.


The injector assembly receives fasteners such as bolts used in the manufacture of composite aircraft wing structures, at a high speed from a supply thereof, such as a cartridge. The injector assembly includes a post assembly which includes a hollow post housing having a post mass and a mass stop pin positioned within the housing. The bolt moves through a feed tube assembly, a muzzle member and into a chamber portion of the injector assembly. A urethane contact member is positioned at a forward end of the mass. A source of compressed air moves the mass and the contact member into a position slightly past the rear end of the housing and into a chamber portion of the injector assembly. When the bolt contacts the contact member at high speed, the mass is moved back toward a base portion of the post assembly. The mass is sufficient to dissipate the kinetic energy of the moving bolt without damage thereto.


The system includes a collar feed assembly which includes a channel within a step assembly at the end thereof, which defines a receiving cavity for the collar. The receiving cavity is configured so that the collar can move slightly therein, permitting a die portion of a die tool to engage a center opening of the collar, so that the collar can come into accurate alignment with the center axis of the die tool. The die tool is mounted to be movable slightly transversely to permit a reliable transfer of the collar onto the bolt. The collar is more compliant than the die tool during loading of the collar onto the die pin and the die tool is more compliant than the collar during transfer of the collar from the die pin onto the bolt.


The system includes a moving feed assembly through which a collar is moved by compressed air to a position in substantial alignment with the centerline of a swaging die assembly. Two spring-loaded fingers are mounted on opposing sides of the feed assembly for receiving the collar by compressed air action where it is maintained in substantial alignment with the swaging die assembly. The spring action of the fingers is strong enough that the collar can be pressed firmly against a curved receiving portion of the fingers by the compressed air. A die pin portion of the swaging die is then inserted into the collar, thereafter maintaining the position of the collar as the feed assembly with the opposing fingers are stripped away from the collar, leaving the die pin-engaged collar free to be moved by action of a ram assembly to a stackup of parts to be fastened, where the collar can be transferred onto a bolt which extends through the stackup.

Loading Electroimpact Inc. collaborators
Loading Electroimpact Inc. collaborators