Used robots perform auto and aero tasks
Greg Reed, Contributing Technical Editor -- Test & Measurement World, 6/1/2005
Contrary to what you may see in blockbuster movies, robots are not going to take over the world. But they are performing more tasks and becoming more prevalent in many industries.
I recently spoke with Peter Struwing about the use of robots—including secondhand robots—in automotive and aerospace applications. An industrial technologist and robotics pioneer, Struwing has experience in automation design, installation, and maintenance. As co-founder of Robotic Production Machinery in Ontario, Struwing was responsible for engineering and installing robot assembly teams at the Ford, GM, and Chrysler plants in Canada. His expertise encompasses many makes of robots—from ABB to Motoman—but he specializes in the installation and debugging of FANUC automation systems.
Q: What activities do robots perform during automotive and aerospace manufacturing?
A: There are many processes that are similar in automotive and aerospace. The use of robots for tasks such as welding, material handling, deburring, and paint and coating applications is quite common. Robots are now performing functions that were deemed impossible a few years ago, thanks to continuous advancements in the components that make up a robotic system, including the mechanical unit itself, motion-control application-specific software, and the tooling that actually does the work.
Q: Why employ "used" robots? Aren't new robots more advanced?
A: Yes, new models are more advanced with greater capabilities, but not every manufacturer can afford to purchase a new robot, and not all applications require the advanced functions that come with a new robot. The lower price of a used robot can make the cost justification easier. Used robots are another variable in the equation to justify a project. If you are using your computer for word-processing and e-mail functions, then you do not need the "latest and greatest" processor, but if you are doing lots of CAD or graphics, then you do need the "latest and greatest."
Q: Are there suppliers that specialize in robotics for automotive and aerospace applications?
A: Yes, there are several OEM suppliers and there are many integrators that can service even the most rare and demanding application. Robots are very flexible and over the years have become easy to program and operate in a safe environment.
Q: What are the significant limitations of robotics in automotive or aerospace manufacturing?
A: The limitations are few, as there is such a variety of robots in size and payload rating that the limitations today are external to the robot, as in the tooling design and parts delivery. The robots of today maintain their repeatability even after many hours of use.
Q: Do you have advice for engineers seeking to purchase used robots?
A: Define where you are starting at (part size, production rate, space availability) and where you need to go to meet your project objectives. Ask your supplier as many questions as possible about your application to be sure you are getting the correct robot for the job. Is the supplier experienced enough to understand your process now and down the road? Let the suppliers—and integrators—bring their experience to your project.
Q: Any final comments?
A: Industrial robots are user friendly, and you can find one at a price that fits most budgets. But be cautious about buying a robot with no after-support, such as from an auction, as you may not be getting an operational unit.
Getting such a robot to run could cost more than buying one from a reseller who offers a warranty. Installing a first robot brings up many questions, so work with a qualified integrator who understands your process and who is qualified to install the robot safely.
You can reach Peter Struwing at strandgaard@cogeco.ca
