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This hybrid-manufactured aluminum humanoid robot joint housing combines SLM 3D printing for an internal diamond lattice core with precision CNC machining for critical mating surfaces. The result is a ultra-lightweight yet extremely rigid component that significantly reduces inertia while maintaining the structural integrity required for high-speed, high-torque movements in next-generation humanoid robots.
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Dawang Precision
Engineered specifically for humanoid robotics, this hybrid SLM + CNC machined aluminum robot joint housing integrates a complex internal diamond lattice created via metal 3D printing. This lattice drastically cuts weight while preserving exceptional torsional rigidity and vibration damping. Critical external flanges, bores, and mating surfaces are then finished with 5-axis CNC machining to achieve tight tolerances and perfect alignment for servo motors and harmonic drives. The combination of additive lattice technology and subtractive precision delivers a structural part that is substantially lighter than traditional cast or fully machined alternatives, enabling faster joint acceleration, lower energy consumption, and improved overall robot agility without compromising durability or load capacity.
We provide full-cycle support for humanoid robot developers — from topology optimization and lattice design simulation to hybrid manufacturing, post-processing, and functional validation testing. Our process allows rapid iteration on lightweight designs that traditional methods cannot achieve, helping OEMs reduce joint inertia, extend battery life, and accelerate prototype-to-production timelines while maintaining the ultra-high precision required for stable bipedal locomotion.
A pioneering humanoid robotics startup in the United States was developing a full-size general-purpose robot for warehouse logistics. Their initial joint housings, made from solid CNC aluminum, caused excessive inertia, limiting walking speed and increasing power consumption. Weight reduction targets could not be met with conventional manufacturing.
We redesigned the joint housing as a hybrid SLM + CNC machined aluminum component. Using topology optimization software, we created a diamond lattice core via SLM 3D printing, then precision-machined all functional surfaces on 5-axis CNC centers. The final part maintained full structural strength while dramatically reducing mass.
Joint housing weight reduced by 47% versus the original solid aluminum design
Robot walking speed increased by 28% with the same motor power
Energy consumption per step decreased by 31%, extending operational time per charge
Fatigue testing exceeded 1.2 million cycles with zero structural failure
Client Feedback
“The hybrid 3D printed robot joint housing from Dawang exceeded every performance metric. The lattice structure gave us the weight savings we needed while CNC finishing delivered the precision our actuators demanded. This part is now the cornerstone of our next-generation platform.”
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