Motoman Robots Arc Welding and Handling

Skid Steer ROPS Cab Assemblies

A Motoman HP600 robot with custom hydraulic gripper fixture positions ROPS cab assemblies for welding by two EA1900N “Expert Arc” robots. “Jigless ” cell includes multiple robot control of all three robots by one NX100 TR3C controller. (Part not shown.)

Desired cycle time for “jigless” cell was 6 minutes; robot system easily achieves 5.5-minute cycle time for welding ROPS cab assemblies. Three pre-tacked assemblies can be staged on the infeed conveyor, and three welded assemblies can be queued on the outfeed conveyor, with a fourth assembly in the HP600’s EOA tooling, providing approximately 30 minutes of unattended production. Robot system provides high-quality, consistent welds and increases part throughput. Compact cell layout accommodates customer’s preferred part flow.

Project Challenges

 

Motoman Robotics Solution

Motoman Robotics provided a custom “jigless” welding solution, including:

Fixtures/Tooling Details

For this "jigless” system, Motoman Robotics provided the custom end-of-arm tooling for the HP600 robot. Hydraulically actuated EOA gripper fixture is designed to hold one pre-tacked ROPS cab assembly at a time. The gripper fixture constrains the assembly during the welding process to ensure consistency and repeatability of welds. Customer is responsible for providing pretacked parts within allowable tolerances in all directions to allow proper welding.