Robert T Thornton

Title: Innovations of Robert T. Thornton

Introduction

Robert T. Thornton is a notable inventor based in Clarkston, MI (US), recognized for his contributions to the field of welding technology. With a total of three patents to his name, Thornton has developed innovative methods that enhance the efficiency and effectiveness of welding processes.

Latest Patents

One of his latest patents is a "Resistance welding control method." This invention provides a method of producing a series of substantially uniform spot welds between two metal parts using a servomotor-driven movable electrode and an axially opposing fixed electrode. Target values for electrode displacement in producing a weld indentation and electrode squeeze force are determined for the electrodes and workpieces. During welding operations, electrode displacement and electrode force measurements are continually taken and compared with the displacement and force target values. While the measured values are within a tolerance range of the target values, welding is continued using the preset parameters. When either or both of the measured electrode displacement or force value falls outside the target range, the total welding current is adjusted in small increments to correct the displacement and/or force values, and thereafter, welding is continued using the new total welding current.

Another significant patent is the "Method and apparatus for welding a metal fastener to a metal member." This invention discloses a method and apparatus for projection welding a metal fastener, such as a nut, to a metal member, like a sheet. The apparatus includes a first electrical contact and a locator assembly having a second electrical contact. For welding the fastener to the member, the locator assembly aligns through-holes of the fastener and sheet, and a current is passed through protrusions of the fastener. In turn, the protrusions are softened to bond with the member.

Career Highlights

Robert T. Thornton is currently employed at GM Global Technology Operations LLC, where he continues to innovate and contribute to advancements in welding technology. His work has significantly impacted the manufacturing processes within the automotive industry.

Collaborations

Thornton has collaborated with notable colleagues, including Pei-chung Wang and Jerry D. Ramsden, who have contributed to his projects and innovations.

Conclusion

Robert T. Thornton's innovative patents and contributions to welding technology demonstrate his commitment to advancing the field. His work continues to influence manufacturing processes, particularly in the automotive sector.