Special Purpose Machines
Semi-Automated Drilling and Routing Machine Design for EV Battery Panels
This project was executed through one of our esteemed partners for a leading automotive supplier. The end customer is renowned for manufacturing high-quality plastic components for passenger vehicles. Their product range includes bumpers, tailgates, spoilers, EV battery panels and body panels.
Scope
The scope of this project was to design a semi-automated drilling and routing Special Purpose Machine (SPM), along with a custom fixture, specifically for the front cover panel of an EV battery.
Key requirements included:
- Designing a dedicated fixture to securely hold the battery front cover, made from a customized plastic material, during both drilling and routing operations.
- Incorporating a servo-driven mechanism that allows the operator to switch between drilling and routing modes based on the process requirements.
- Delivering a robust and operator-friendly solution that ensures consistent machining quality, improved efficiency, and reduced manual intervention.
Challenge
- Complex Geometry Handling: The front cover panel had intricate contours and varying thicknesses, requiring a fixture that could securely clamp the part without causing deformation.
- Material Sensitivity: The customized plastic material was prone to heat damage and surface defects, demanding precise control over drilling and routing processes.
- Multi-Process Capability: The machine needed to perform drilling of multiple hole sizes and routing of slots in a single setup, maintaining high precision and repeatability.
- Variant Accommodation and Operator Ease: The fixture had to handle two panel variants (standard and extended) without major setup changes, while keeping machine operation simple and intuitive for the shop floor team.
- Tight Cycle Time: The design had to enable efficient drilling and routing of the panel within a strict cycle time of 160 seconds. This required careful planning of tool paths, process sequencing, and fixture accessibility to minimize idle time and ensure smooth transitions between operations.
Solution
We designed a semi-automated drill and router machine specifically for the EV battery front panel. The objective was to meet tight production targets while ensuring flexibility and accuracy.
This project brought together our core strengths in mechanical design and industrial automation services. The solution we delivered included the following key steps:
1. Precision Fixture for Complex Geometry
We developed a custom fixture that securely holds the front cover of the battery case without deforming it. The design accounted for the cover’s uneven thickness and complex shape. Our solution ensured accurate and repeatable drilling and routing across all units.
2. Dual-Process Tooling with Servo-Driven Indexing
For sections that required both drilling and routing, we integrated Suhner modular units with specific tool bits. These units were mounted on servo-actuated X-Y slides, which enabled precise, programmable positioning. This step eliminated the need for manual repositioning and reducing cycle time.
3. Quick Changeover for Two Variants
To support both standard and extended panel versions, drill units were mounted on slider mechanisms with a built-in changeover feature. The operator can switch between variants by repositioning the units. No tool changes required. This minimized setup time and kept operations consistent.
4. Designed for Tight Cycle Time
With a target cycle time of 160 seconds per panel, every element of the design was optimized for speed and efficiency. Reusing drill units across variants, shortening tool travel paths, and automating movement through servos allowed us to meet this production requirement without compromise.
5. Integrated, Shop-Floor-Ready Machine Base
The entire fixture and tooling system was mounted on a custom frame that housed electrical panels, servo drives, maintenance doors, and a dust collection manifold. This compact structure simplified installation and ensured operator access and reduced downtime.
This special purpose machine was designed with DFM (Design for Manufacturing) and DFMEA (Design Failure Mode and Effects Analysis) to ensure it’s reliable, safe, and easy to maintain.
We delivered the final design to the client after validating it against all required safety and quality standards and performance criteria. We also ensured the design smoothly integrated into the client’s existing production line, minimizing disruption and enabling quick setup.
Value and Benefits
Our precision-driven SPM design made machining EV battery covers faster and more accurate by reducing manual work and improving overall process efficiency.
The design seamlessly integrated into the client’s existing line, enabling a quick and smooth setup.
The fixture was designed for easy assembly and disassembly, simplifying maintenance and minimizing downtime.
The EV battery panel drilling and routing setup allowed switching between two panel variants without major adjustments.
Built with DFM and DFMEA principles, the machine ensures durability, reliability, and minimal risk of failure, meeting all the client's requirements.
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