Motoman Robots Arc Welding

Flexible welding solution uses (4) Motoman HP50-20 robots invert-mounted from overhead transport beams and (2) HP50-20s on a linear servo track to weld large crane turntable frames mounted on (2) heavy-payload headstock/tailstock positioners.Crane Turntable Weldments (Construction Equipment)

Flexible robot system welds 10 different pre-tacked turntable frame weldments. Different parts can be welded on the two headstock/tailstock positioners, but cycle times are balanced to optimize productivity. Robot system easily achieves required 1.79-hour steady-state takt time. Robotic system improves productivity and provides consistent, high-quality welds that meet customer’s specifications.

Project Challenges

Motoman Robotics Solution

Motoman Robotics provided a highly flexible custom welding solution, including:

Fixtures/Tooling Details

Motoman Robotics provided hydraulically clamped tooling used to locate parts on the headstock/tailstock positioners. Fixturing package includes two (drop-center type) spanner back-bones with a mounting surface for turntable bearing plates. Some manual change-out is required between the part models. Parts are mounted on locating pins.