High-Precision 5-Axis CNC Machining for Sony Aluminum 6061 Optical Lens Housing
Project Background: Structural Shell for High-End Optical Lens
Sony required a structurally rigid, lightweight, and aesthetically refined aluminum lens housing for one of its flagship interchangeable lens models. This optical component had to meet stringent dimensional tolerances, surface cosmetic expectations, and brand identity consistency. Neway was selected as the advanced CNC machining supplier to deliver a one-stop production workflow, from raw turning to finishing.
Why Aluminum 6061 for Optical Lens Housings
Aluminum 6061 strikes the ideal balance between structural performance, corrosion resistance, and surface finish quality—essential for optical component housings.
Property | Value |
|---|---|
Yield Strength | ≥240 MPa |
Surface Finish Suitability | Excellent for coating and blasting |
Weight-to-Strength Ratio | High |
Machinability | Excellent |
Its stable machinability and surface finishing compatibility make it the go-to alloy for consumer electronics, aerospace, and camera-grade optics.
Machining Process Breakdown
CNC Turning (Roughing Stage)
Initial shaping was done through CNC turning, removing bulk material, and establishing concentric references for subsequent milling.
5-Axis CNC Precision Machining
The optical lens shell featured several undercuts, slots, and spiral-threaded rings for the zoom/focus interface. 5-axis CNC machining enabled multi-plane tool access, achieving ±0.01 mm concentricity between critical optical bores and threads.
Surface Treatment Sequence
To ensure both durability and premium appearance, the following steps were performed:
Sandblasting: Delivered a matte, anti-glare finish (~Ra 1.4 μm) ideal for optical-grade housings
Painting: Multi-layer black matte coating optimized for UV stability and wear resistance
Laser Marking: Applied serial number and brand insignia with high contrast and no thermal distortion
Quality Control & Inspection
Dimensional Verification: All threads and optical axis features were inspected with CMM and 3D laser scanning
Surface Testing: Coating adhesion was verified per ASTM D3359; gloss levels controlled under 85° angle standards
Logo Engraving: Verified for clarity and depth using ISO 14782-compliant measurement tools
Production Results
The lens housings were produced in batches of 1,200 units, with zero rejections and >99.5% first-pass yield. Sony reported outstanding consistency in both optical alignment and exterior coating durability. The housing passed thermal cycling and drop shock tests without cosmetic degradation or dimensional shift.
Why Neway for Optical CNC Lens Components
Aluminum CNC Machining: Essential for concentric and angular precision between optical surfaces and threaded mounts
CNC Turning Service: Enables high-speed material removal and accurate cylindrical geometry
One-Stop Manufacturing Service: Complete in-house control over machining, coating, and branding reduces lead time and improves consistency
FAQs
What is the achievable tolerance for optical lens housings using 5-axis CNC machining?
How is coating adhesion tested on CNC machined aluminum parts?
Can painted and sandblasted surfaces maintain uniform appearance across large batches?
What techniques ensure thread-to-bore concentricity on cylindrical lens components?
How does laser marking affect the final surface integrity of painted aluminum parts?
