Autodesk held an open house Wednesday to show off its new industrial workshop and innovation studio in South Boston. The 34,000-square-foot work space, part of the industrial software maker’s offices at the Innovation and Design Building, is a toy room of tools and technologies for builders and designers. The space has 11 workshops and dozens of industrial-grade pieces of equipment, including robots built for the factory floor, 3-D printers, and a five-ton bridge crane. The open house featured a visit from Boston Mayor Martin J. Walsh. Autodesk hopes the facility will serve as an incubator space for startups and entrepreneurs, and as an R&D shop for companies in fields such as construction, engineering, and architecture.