You can contact any one of the three major robot manufactures, they have application engineers that will work with you to develop the right system for you. Motoman North America, Dayton, OH or ABB Robotics, Auburn Hills, MI or Fanuc North America, Rochester Hills, MI. All of these companies have welding and cutting experts to help you develop the exact system that you need to make the parts. They also do their own integration, so you will get a turn key system. I have worked with every one of these manufactures over the years, and they all do a good job. Mig, Tig, plasma, laser (Co2/ Nd:Yag), resistance, and material handling are all processes that I have worked on with robots from any one of these manufactures. Some smaller integration houses with good welding expertise are Genesis Systems Group, Davenport IA, RPT, Auburn Hills, MI and Accu-Built in Jackson, MI. Your in good hands with any of these groups.