39th Precision Sheet Metal Technology Fair

Welding fabrication (10 entries)

Welding324

Cross-Sectional Record: Pushing the Limits of Dissimilar Metal Welding

  • ・Size: W200 x D200 x H200 mm

  • ・Accuracy: ± 1 mm

  • ・Programming time: 140 min

  • ・Processing time: 4970 min/quantity

  • ・Quantity: 1

  • ・Material: ステンレス、パーマロイ合金、銅

  • ・Thickness: 3.0 mm

  • ・Type: Prototype

Process

  • Planning

  • 2D/3D Design

  • Blanking

  • Press

  • Welding

  • Press

  • Wire electrical discharge machining

  • Welding

Strengths

Challenging the joining of stainless steel, permalloy, and copper—materials with vastly differing thermal conductivities, melting points, and thermal expansion coefficients. Driven by a culture of transforming setbacks into empirical data, when the chamber did not meet vacuum airtightness standards, it was not discarded. Instead, it was sectioned using in-house wire electrical discharge machining (EDM) to directly visualize penetration depth, heat-affected zones (HAZ), and joint interface dynamics, converting the result into shared technical knowledge. Conceived not as a failure, but as an experimental prototype charting future standards, this chamber condenses our technical precision and inquisitive spirit from welding through wire EDM.