Sunfield Inc.

With the expansion, the Toyota plant will make differentials, rear axles and other driveline products in addition to its engine lineup.

Ensuring roundness accuracy in general press drawing using precision molds The larger the diameter, the more difficult it is to ensure roundness. However, by using precision molds and drawing technology, we were able to achieve highly accurate roundness through sheet metal press drawing and mass production. In sheet metal press processing, it is difficult to ensure roundness of objects with large diameters and irregular shapes. In sheet metal press processing, it is difficult to ensure the roundness of objects with large diameters and irregular shapes.Problems 　: - It takes time to adjust the dimensions for each material lot, and the production volume is 300 pieces/hour - There is little play in the guide, so there are no scratches. Due to the large number of occurrences and short stoppages, production speed cannot be increased. ・High roundness and appearance defect rate Ensuring roundness of large diameter objects using precision molds and drawing technology Improvement of materials, molds and processes 　Review of blank shape Stabilization of material rolling direction 　Review of clearance for each drawing process (5-7% reduction) Making 　work guide and half-piercing process movable 　Inner diameter after process that worsens roundness Addition of deciding process Achieved mass production of 500 pieces/hour with high accuracy Roundness 0.12 (new standard) Cp=1.65 *Actual measurement value 0.05 to 0.10 Quality 30% UP + Productivity 40% UP = Production cost down Realized

Happy Mothers Day! Thankful for all you do everyday at home and at work.