Aoshiji® Custom Tool – Drill-Milling Combination Tool for New Energy Vehicle Triangle Beam Machining
In this case study, we focus on a drill-milling combination tool for new energy vehicle triangle beam machining — a solution engineered to replace multiple conventional cutters with one integrated Drill-Mill Combination Tool for Aluminum Machining. This advanced tool architecture enables stable drilling, enlarging, and milling of die-cast aluminum triangle beams within a single process, significantly improving efficiency and process reliability.
01 Drill-Milling Combination Tool for NEV Triangle Beam – Introduction
In electric vehicles, the triangle beam serves as a critical structural component of the vehicle body, designed primarily to enhance collision safety performance. Positioned at the front of the vehicle body, it connects rigidly with the side body assembly, forming a key load-bearing node that contributes to overall body stiffness and vibration characteristics.
As this part requires both high rigidity and precise geometric consistency, manufacturers increasingly rely on advanced process solutions—particularly high-efficiency aluminum tools such as the Drill-Mill Combination Tool for Aluminum Machining designed for new-energy vehicle triangle beam applications—to ensure stable dimensional accuracy during mass production.
During frontal impact conditions, the triangle beam functions as a core energy-absorbing member within the front-end crash structure. Through controlled material deformation, it efficiently dissipates impact energy and transfers the load along the designed load path to the side structure. This mechanism significantly improves the energy absorption efficiency of the front longitudinal beam during compression, thereby strengthening the vehicle’s overall crashworthiness.
Structurally, the triangle beam features an integrated slanted-beam and cross-beam design, forming a stable triangular mechanical frame. The integrated positioning plate enables detachable assembly with the front side panel, achieving both high rigidity and ease of maintenance. This modular approach minimizes component count, reduces tooling and production costs, and standardizes interface design for efficient assembly—a balance of mechanical strength, manufacturability, and economic performance that represents a key direction in modern electric-vehicle body-structure engineering.
02 NEV Triangle Beam – Component Specifications and Machining Requirements
Workpiece: Triangle Beam (Structural Component for Electric Vehicles)
Material: Aluminum Alloy
Machine Tool: Vertical Machining Center
Coolant: Internal Cooling
Operation 1: Drilling ⌀8.2 mm through-hole, depth 3 mm
Operation 2: Drill-milling 7 ± 0.2 mm slot hole, depth 2.5 mm
Operation 3: Drill-milling 10 ± 0.1 mm slot hole, depth 3 mm
Cutting Parameters: Spindle Speed S = 6775 rpm | Feed Rate F = 510 mm/min
Tool Life Requirement: 5 000 components
Product Drawing: As shown below
03 Machining Challenges for Drill-Milling Combination Tool in NEV Triangle Beam Production
The triangle beam component for electric vehicles is made of a new aluminum alloy material with complex mechanical and thermal properties. During high-speed machining, the tool is prone to adhesion and built-up edge formation under elevated temperatures, which severely affects surface finish and shortens tool life. Conventional cutting methods cannot effectively resolve these thermal and adhesive challenges—highlighting the need for an integrated aluminum-cutting solution such as the Drill-Mill Combination Tool for Aluminum Machining specifically optimized for new energy vehicle triangle beam production.
At the same time, the Aoshiji® Custom Tool drill-milling combination tool must integrate drilling, enlarging, and milling functions into a single cutter — a significant engineering challenge that requires precise coordination of tool geometry, structural rigidity, and spatial layout to maintain machining stability and dimensional accuracy during mass production. This is particularly important for aluminum applications, where the Drill-Mill Combination Tool for Aluminum Machining must simultaneously manage chip adhesion, heat generation, and vibration control.
Manufacturing such a multi-functional, high-precision tool is also inherently complex. It requires rigorous evaluation of carbide substrate selection, coating performance, wheel compatibility, grinding sequence planning, and optimized cutting-edge geometry. Only through strict process control and precision grinding can dimensional consistency, geometric stability, and long-term repeatability be ensured across thousands of components.
Finally, the customer required not only extended tool life but also higher machining efficiency. The combined challenge of aluminum alloy behavior and multi-stage composite-tool geometry made this project particularly demanding. Through iterative testing, cutting-data refinement, and geometry optimization, Aoshiji® Custom Tool successfully achieved—and exceeded—the customer’s performance and durability targets.
04 Optimized Drill-Milling Combination Tool Solution from Aoshiji® Custom Tool
Design Features
Reinforced Rigidity and Anti-Vibration Structure
Aoshiji® Custom Tool’s Drill-Milling Combination Tool for New Energy Vehicle Triangle Beam Machining adopts a reinforced core-thickness structure that greatly increases the cross-sectional strength of the tool body. This enhanced rigidity minimizes vibration and suppresses chatter during long-overhang machining. As a result, the tool—designed in alignment with the performance requirements of a Drill-Mill Combination Tool for Aluminum Machining—maintains exceptional cutting stability and smooth chip evacuation throughout the integrated drilling, reaming, enlarging, and milling processes.
Geometry Optimization for Aluminum Alloy Cutting
The drill tip, flute profile, and peripheral cutting edges are engineered specifically for the characteristics of high-strength aluminum alloys used in new-energy vehicle triangle beams. By precisely tuning the rake angle, relief angle, and micro-hone radius, the cutting geometry achieves an ideal balance between sharpness and durability. This geometry optimization strengthens the overall performance of the Drill-Mill Combination Tool for Aluminum Machining, significantly improving chip formation, material removal efficiency, and surface finish consistency.
Full-Surface High-Polish Treatment
A mirror-grade polishing treatment is applied across the tool’s core surface to minimize friction and suppress aluminum adhesion. The cutting edges are ultra-polished to prevent built-up edge (BUE) formation, allowing the tool to maintain continuous, stable cutting performance even during extended machining cycles. This contributes to smoother surfaces, lower cutting temperatures, and substantially longer tool life—key advantages for any Drill-Mill Combination Tool for Aluminum Machining operating in high-speed aluminum environments.
Precision Material and Coating Synergy
The tool is manufactured using a premium micro-grain carbide substrate paired with a high-temperature, low-friction coating optimized for multi-process machining. This material-coating synergy ensures excellent wear resistance, superior chip evacuation, and stable performance across drilling, enlarging, and milling stages. Together, these properties reinforce the tool’s effectiveness as a Drill-Mill Combination Tool for Aluminum Machining, meeting customer requirements for high machining efficiency, long service life, and reduced cost per part.
05 Performance Results of Aoshiji® Drill-Milling Combination Tool for NEV Triangle Beam
| Tool Brand | Tool Diameter | Spindle Speed (S) | Feed Rate (F) | Tool Configuration | Tool Life |
|---|---|---|---|---|---|
| Other Brand | ⌀7.1 / ⌀8.3 / ⌀10.05 × L105 × SD12 | 6,775 r/min | 510 mm/min | Drill + End Mill (two tools) | Drill: 5,000 pcs End Mill: 3,500 pcs |
| Aoshiji® Custom Tool | ⌀7.1 / ⌀8.3 / ⌀10.05 × L105 × SD12 | 6,775 r/min | 510 mm/min | Drill–Mill Integrated Tool (one tool) | 6,500 pcs (+60% overall life, double machining efficiency) |
| Conclusion | By integrating drilling and milling into a single tool, Aoshiji® Custom Tool reduced tool count by 50%, doubled machining efficiency, and improved total tool life by over 60%, delivering both performance and cost benefits. | ||||
In conclusion, the Drill-Milling Combination Tool for New Energy Vehicle Triangle Beam Machining developed by Aoshiji® Custom Tool has successfully addressed the core challenges associated with processing next-generation lightweight materials used in new-energy vehicle structures. The customer’s triangle beam component presented significant difficulties in tool accessibility, material adaptability, and precision control across multiple integrated operations.
By combining drilling, enlarging, and milling within a single high-performance tool—and leveraging the same engineering principles used in our Drill-Mill Combination Tool for Aluminum Machining—we delivered a stable, efficient, and long-life machining solution capable of maintaining dimensional accuracy under real production conditions. This integrated tool design meets stringent manufacturing requirements while significantly improving productivity, process stability, and overall tool life in demanding, high-volume environments.
As discussed in our previous article “Aoshiji® Custom Tool Case Study | Multi-Step Reamer for Fuel Injector Bore Machining – Precision, Stability, and Extended Tool Life”, our engineering philosophy is centered on practical innovation and data-driven tool optimization. For this project, we implemented a reinforced anti-vibration core design that ensures rigidity and cutting stability during long overhang operations; a geometry-optimized cutting edge tailored to aluminum alloys to balance sharpness and edge strength; and an ultra-polished surface finish that minimizes chip adhesion and improves chip evacuation. In addition, the precise combination of carbide substrate and advanced heat-resistant coating extends tool life while maintaining excellent surface integrity and dimensional accuracy.
This new-generation drill-milling composite tool achieves what conventional designs cannot—stability, performance, and cost efficiency in a single solution. It allows simultaneous drilling, enlarging, and milling with outstanding repeatability and surface finish, even in materials prone to built-up edge or thermal adhesion.
For related applications, Aoshiji® Custom Tool also offers the Combination Drill & Chamfer Tool series, delivering integrated chamfering and hole-making performance across diverse materials and geometries.
Just as global leaders like Sandvik Coromant and MAPAL continue to redefine high-performance machining of lightweight components, Aoshiji® Custom Tool remains committed to advancing the boundaries of multi-functional tool design—offering engineering solutions that combine efficiency, precision, and real-world reliability.
By choosing Aoshiji® Custom Tool’s drill-milling combination tools, manufacturers gain not only a cutting tool but a comprehensive process innovation—empowering stable, high-accuracy machining and extending tool life in the complex world of new energy vehicle manufacturing.
