Case Studies Robot System for Automatic Screw Shear & Bung Assembly

Robot System for Automatic Screw Shear & Bung Assembly

Robot System for Automatic Screw Shear & Bung Assembly

The world’s leading manufacturer of electricity meters approached RNA to design and developed a robot assembly system for automatic screw shear and bung assembly.

Working alongside our customer, RNA have developed an automatic robot system to shear and dispose of the screw heads for both an existing smart meter housing and a new type smart meter housing and additionally assemble the square and round bungs to the new type meter on a test and print system.

RNA skills:-

  • Bowl feeding
  • Robotics
  • Assembly & Testing
  • Machine building and integration
  • Machine and process control
  • Pick & place
  • PLC control
  • Project management

The robot assembly system is mounted after the laser printing station. The screw heads are sheared using an air operated driver with a compliant head mounted on a small 6 axis Nachi
obot. The sheared heads are removed by the robot using vacuum and deposited into a chute as waste.

The square and round plastic bungs for the new type meter are fed using individual bowl feeders to dead nests. The robot assembles the bung into the appropriate slot on the meter housing. Additional plunger mechanisms are included to ensure the bungs are fully assembled into position.

Key features

  • Nachi MZ04 Robot
  • Robot mounted air operated screwdriver with compliant head
  • Robot mounted vacuum head
  • Square bung bowl feeder with linear track and dead nest
  • Round bung bowl feeder with linear track and dead nest
  • Waste screw head chute
  • Guarding
  • Control system

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