SEATTLE—About 33,000 union members at Boeing went on strike Friday after they overwhelmingly rejected a proposed four-year contract with the troubled aircraft manufacturer.

Ultrasonic welding joins copper sleeves to aluminum bus bars to facilitate assembly with threaded fasteners.

GRAZ, Austria—Engineers at the Graz University of Technology recently developed a new process that enables adhesive-free joining of metal and wood components.

ROCKFORD, IL—Ingersoll Machine Tools Inc. recently began assembling the world’s largest telescope mount at its factory here.

NEWPORT, AR— NorthStar Clean Energy’s solar farm here will support the electricity needs of three General Motors assembly plants.

GREENVILLE, SC—For 40 years, Lockheed Martin has proudly called Greenville, South Carolina home, embedding deep local roots while contributing to global security. As the company celebrates this significant milestone, 

VICTOR, NY—New Scale Robotics has been named an authorized systems integrator (ASI) for FANUC America Corp., enabling the company to more effectively use its Q-Span automated gauging technology in conjunction with FANUC’s collaborative robots.

SANTIAGO DE LOS CABALLEROS, Dominican Republic—Eaton Corp. has opened a new state-of-the-art assembly plant here to meet growing demand for its fuses. 

WASHINGTON—Law firm Wiley Rein LLP has filed trade petitions against Chinese manufacturers of golf carts and other vehicles on behalf of the American Personal Transportation Vehicle Manufacturers Coalition. 

DUBLIN, Ireland—Eaton Corp. has modernized its manufacturing footprint with smart factories in Juarez, Mexico, and Changzhou, China.