Aluminium Enclosures for Robotics and Factory Automation

Robotics hardware is weight-sensitive in a way fixed industrial equipment is not: every gram on a moving arm is torque the motor has to produce and energy the battery has to carry. The enclosure therefore has to be thin-walled and stiff, carry accurate mounting datums for sensors and drives, and often dissipate heat from a servo drive in the same volume. Extruded profile plus precision machining is usually the right answer.

What makes this enclosure difficult

These are the failure modes we see most often in this application — and the ones we design against from the first section drawing:

• Weight directly costs performance. On a moving axis, enclosure mass multiplies through the whole duty cycle.
• Mounting datums have to be accurate. Sensor and drive alignment depends on machined features holding position relative to each other.
• Heat in a sealed moving assembly. Servo drives dissipate into a housing with limited airflow.
• Cable management is part of the design. Cable ducts and strain relief are often expected in the structure itself.

How we handle it

Thin-wall sections for stiffness at low mass

We routinely run 0.3–0.8 mm walls with thickness held to ±0.02 mm, so you can remove material without losing predictable section behaviour. Ribs and chambers are extruded rather than machined, which is how stiffness is recovered without adding mass.

Datum faces machined in one setup

Mounting faces, sensor seats and threaded holes are machined in the same fixturing, so positional relationships hold instead of accumulating across operations. For vision and encoder mounting this is usually the deciding factor.

Cable and duct features designed into the section

Cable channels, cover grooves and strain-relief features can be extruded features, removing separate parts and assembly steps. We look for these during DFM review because they are cheap in the die and expensive to add later.

Thermal path for sealed drives

Where a servo drive mounts to the housing, we machine the interface for flatness so the thermal path is reliable, and propose fin geometry on the external surface where convection is available.

±0.005 mm cut-to-length for repeatable frames

Structural profiles arrive at length, so frame and enclosure assemblies build repeatably without shimming or trimming.

Capability that matters here

Parameter	Typical capability	Why it matters
Wall thickness	0.3 – 0.8 mm	Low mass on moving axes
Wall thickness tolerance	±0.02 mm	Predictable stiffness
Datum face machining	Same setup as threads and seats	Sensor and drive alignment
Inner / outer diameter tolerance	±0.04 mm	Repeatable joint and bearing fit
Cut-to-length accuracy	±0.005 mm	Frame assembly without shimming
Integrated features	Cable ducts, cover grooves, ribs extruded	Fewer parts, fewer assembly steps

Typical parts we make for this industry

• Servo drive and motor controller housings
• Machine vision camera bodies
• AGV and AMR controller enclosures
• Collaborative robot joint and link covers
• Encoder and sensor housings
• Conveyor and linear module structural profiles

Material and finish

6063-T5 where finish and fine section detail matter; 6061-T6 or 6082 where the enclosure is load-bearing, carries threaded connections under vibration, or forms part of a structural link.

Our polish-free 6063 route runs primary billet from a state-owned mill through ceramic filtration, degassing and homogenising, so the profile goes straight to 180# blasting and anodising with no polishing stage — typically around 15% less finishing cost. We deliberately do not take high-pressure die-casting work; all capacity goes into extruded profile and precision machining.

Questions buyers in this industry ask

Can you keep the enclosure light without losing stiffness?

Yes, by putting the stiffness into the section rather than the wall. Ribs, chambers and cover grooves are extruded features, so the geometry carries the load while the wall stays thin. We routinely run 0.3–0.8 mm walls with thickness held to ±0.02 mm.

How accurate are the mounting datums for sensors and drives?

Mounting faces, sensor seats and threaded holes are machined in the same fixturing, so positional relationships hold rather than accumulating across separate operations. Inner and outer diameters are held to ±0.04 mm. Dimensional reports are available on request.

Can cable management be part of the extrusion?

Usually yes, and it is worth doing. Cable channels, cover grooves and strain-relief features can be extruded directly into the section, which removes separate parts and assembly steps. We look for these opportunities during the free DFM review.

Where we ship these

Other industries we serve