Deep drawing success often depends on understanding material behavior as much as tooling geometry. This program involved an EV motor housing where the customer had already learned the hard way that feasibility on paper does not guarantee stability on the press.
The goal was not simply to produce a few successful samples, but to establish a repeatable route that could scale without hidden defect risk.
Solution Snapshot
We reworked the draw strategy around material flow control, lubrication discipline, and staged validation of draw behavior before releasing the part into repeat production.
Why the part was difficult
The housing demanded significant form depth while maintaining structural integrity and dimensional consistency. Material flow, thinning risk, and local strain concentration all needed careful control.
The previous development path had treated the issue as a tooling problem alone, but the failure mode clearly involved process balance as well.
- Aggressive draw geometry in 2mm steel.
- Tearing risk tied to both tool and process variables.
- Customer needed proof of repeatability, not just sample success.
How we stabilized the draw
We reviewed the forming route holistically, including blank behavior, lubrication control, and staged validation through trial builds. By treating the process as a system, we reduced the stress concentration that had triggered failure in prior attempts.
Critical dimensions and surface condition were monitored alongside the forming result so the team did not solve one problem by creating another.
- System-level review of material flow and process inputs.
- Structured trials before committing to repeat production.
- Validation covered both form integrity and dimensional outcome.
Program value
The client gained a housing program that moved from uncertainty to manufacturable reality. That reduced launch risk and gave the engineering team more freedom to extend similar design logic into future products.
The project also reinforced an important sourcing lesson: difficult forming parts require process development discipline, not just tooling procurement.
- Lower launch risk for an EV drivetrain program.
- Reusable lessons for future deep-drawn components.
- Better confidence in supplier technical problem-solving.