Yaskawa Motoman Robotics

Motoman Robot Spot Welding

Six-axis Motoman ES165 robot equipped with C-type servo-controlled transgun spot welds medical examination tables that are electro-magnetically fixtured on a headstock/tailstock positioner.Medical Examination Tables

System meets all project goals and objectives, including making 58 spot welds and loading assembly onto outfeed conveyor within 330-second production cycle. System yields spot-weld nuggets 4.7 mm (0.19") to 6.34 mm (0.25") diameter. Welding electrode with flat face on the visible side of the cabinet and opposing electrode with 50.8 mm (2") radius help eliminate marking. Robot provides reliable, consistent production on two shifts, five days a week with 98 percent uptime.

Project Challenges

Motoman Robotics Solution

Motoman Robotics provided a custom ES165 spot welding system, including:

Fixtures/Tooling Details

Customer supplied electro-magnetic tooling holds individual table assemblies in the headstock/tailstock fixture. This method enables panel and cross-member components on the inside of each assembly to be held securely by the magnetic force applied to the assembly’s outer side panels, while also allowing better access for the spot welding transgun. Fixtures include part-present sensor.