The ABB Tube Press and Weld system is part of the sub assembly automation for the 9.75 and 8.8 rear axles for the Ford F-150 Pickup Truck and the Transit Utility Van. Despite the difference in axle sizes a complete changeover from one axle type to the other is possible in less than 43 seconds. This unique flexibility is achieved through the use of clever design and a vision system for model detection and verification. Previously the two axles were built on two mutually exclusive press and weld systems, one that operated 24/7 and the other that was underutilized due to lower volume requirements. The new ABB welding system was designed in response to a proposal from the Ford Manufacturing Engineering team to build a new welding system capable of producing both axles, allowing the future flexibility to manufacture to the necessary volumes, and eliminate the overcapacity and underutilization of equipment. The cell also saves valuable manufacturing space.
“We worked closely with the Sterling Axle team throughout the whole process, from the initial concept design to start up and commissioning at the Sterling Axle Plant. It was truly a collaborative effort between Ford and ABB,” said Pete Thomopoulos, ABB project manager. “This is the very first FlexArc® Weld application developed by ABB to fully meet Ford’s strict specifications.”
The system features a total of three IRB 6600 material handling Robots and two Electromechanical Press Stations. After the seal and bearing are pressed for each tube in the first press station, an IRB 6600 Robot loads a pair of tubes along with the axle carrier into the Tube Press station, where the parts are pressed together with forces of up to 67,000 lbs; to exact distances not possible with conventional hydraulic press systems. The assembly is then loaded into an ABB Flex Arc Weld cell that features two IRB 1600 welding robots, with each robot welding the left and right axle. Utilizing an ABB dual fixture IRBP Positioner, the arc welding robots weld an axle in one fixture while the IRB 6600 loads the next axle to be welded on the second positioner fixture. Each IRB 1600 robot is capable of welding both the left and right axle tube, providing valuable backup redundancy to reduce production downtime during maintenance.
The Press and Weld System features ABB’s MultiMove™ and SafeMove™ technology allowing the ABB IRC5 controller to move the robots in fully coordinated motion and work collaboratively in very tight floor spaces, drastically reducing the Manufacturing footprint. SafeMove is both a software and electronics based safety controller that provides Category 3 safety rated supervision of robot motion. Together they enable leaner robot cell solutions and more collaborative applications where robots and operators can work more closely together and under safe conditions.
ABB Robotics in Auburn Hills has since received two additional orders for similar Press and Weld systems from Ford.