Every day, businesses look for ways to improve efficiency and productivity. Frequently, this has meant automating functions with robots. Robots can ensure consistent quality and perform dangerous or repetitive tasks, reducing employee health issues. This frees up valuable human resources to contribute to other production areas.
Many of these mundane tasks have already been automated with traditional robotics. As businesses continue to face the pressures of mass customization, changing requirements and labor shortages, new ways to utilize robotics are being introduced. One of these is mobile robots. Mobile robots can include:
First, what is an autonomous mobile robot? An AMR is a robotic platform designed to function independently of its surroundings. The unit is completely autonomous, which means it can navigate anywhere within the factory or distribution center, while being managed by a central software system. The nature of these devices allows them to be implemented without the need for new infrastructure to guide the units, such as tracks, tape or guide posts. The factory or distribution center is “mapped out” by the autonomous robot so that it knows how to get from location to location. Many autonomous robot vendors have emerged, most of whom target the movement and delivery of smaller payloads (less than 100 kg). These devices can ferry cargo or parts throughout the facility or even deliver racks of various components to work stations. Other vendors have even implemented platforms with payloads upwards of 1,500 kg, enabling movement of compete subassemblies.
A new generation of these autonomous devices is now being coupled with a robotic arm or manipulator. These AIMMs can relocate the robot arm throughout the facility to perform different tasks such as part replenishment, machine loading or fulfillment, but is this the logical next step? Let’s look at a few scenarios.
Multiple Machine Tending
Do you have an environment where parts need to be moved between multiple industrial machines during the manufacturing process? Maybe the work orders are flexible to the point where the use of the machines changes daily. What if the machines are not fully utilized due to lack of staffing? What if you could have a robot automatically move between workstations, carrying parts as needed to the next manufacturing process?
Watch out! Here comes a mobile vehicle with a 10 kg payload robot arm and all the safety features required to address any risk assessment concerns (an AIMM). Perhaps the robot is even one of the new collaborative robots designed to work easily in small confined spaces alongside human workers. Based upon system production requirements and direction from your enterprise resource planning system (ERP), the vehicle, robot arm and parts are automatically dispatched to the proper workcell. Maybe the AIMM loads the machine and moves on to another workstation while the first part is processed. After delivering several components, the AIMM returns to collect and distribute the part(s) to other workcells or to the next production process – all without human intervention.
Is autonomous machine tending useful? Can you envision a system as described, automatically responding to system requests to load, unload and process parts? What requirements would have to be satisfied to make this a reality?
Is there a need for automatic and autonomous delivery of parts? Are there other challenges besides safety that must be addressed?
Tell us what you think
We would love to hear your thoughts on appropriate applications for mobile robots. Are mobile robotic arms the next big thing or just a solution looking for a problem? Is it enough to enable the manual movement of a robot between workcells? What types of applications are best suited for this level of automation, and what unique requirements might pose issues?