5-Axis CNC Machining Case for Aluminum Housing

【Project Background】

This project involved a customized precision aluminum housing for an industrial automation equipment customer. The part was designed to protect and support a core internal module, requiring stable structural strength, accurate assembly performance, effective heat dissipation and consistent surface quality.

The customer provided a 3D model and detailed technical drawings. The material selected for the part was 6061-T6 aluminum alloy. The housing included multiple mounting holes, positioning steps, internal cavities, side slots and thin-wall areas. Since the part needed to be assembled with other precision components, several hole positions, datum surfaces, flatness and perpendicularity requirements were defined as critical quality points.

【Machining Challenges】

The main machining challenges came from the complex structure and tight tolerance requirements. First, the deep internal cavity required significant material removal, which could easily lead to stress release and deformation, especially around the thin-wall areas. Second, several mounting holes were located on different angled surfaces. If processed through repeated setups, datum transfer errors could affect hole position accuracy and assembly consistency.

Third, the customer also required a clean and stable appearance. Tool marks, burrs and inconsistent chamfers had to be carefully controlled to support the following surface treatment process. Some critical dimensions required a tolerance of ±0.01mm, which made process planning, tool selection and inspection control especially important.

【Process Solution】

Based on the part geometry, Qingdao SCreate Industrial Technology Co., Ltd. adopted a 5-axis CNC machining solution to reduce repeated setups and improve overall machining accuracy. Before production, the engineering team analyzed the 3D model, confirmed the main datum surfaces, designed the clamping method and optimized the machining sequence.

During rough machining, material was removed layer by layer with controlled cutting depth to reduce stress concentration. Proper machining allowance was reserved around thin-wall areas and internal cavities to maintain part rigidity before finishing. For multi-angle holes and side features, 5-axis machining was used to complete positioning and cutting in fewer setups, reducing datum conversion errors.

During finishing, suitable tools and cutting parameters for aluminum alloy were selected to control key mounting surfaces, positioning steps and hole dimensions. After machining, all sharp edges were evenly chamfered, and burrs were removed carefully to ensure the part met both assembly and surface treatment requirements.

【Quality Results】

After machining, the quality team inspected the critical dimensions, hole positions, flatness and perpendicularity using CMM measuring equipment. The inspection results showed that key assembly dimensions were controlled within ±0.01mm, and the hole positions and datum relationships met the customer’s drawing requirements.

The finished parts showed no obvious tool marks, dents or burr issues. The assembly test was completed successfully, and the customer confirmed that the housing matched well with the related module. Through this project, SCreate further demonstrated its capability in machining complex aluminum housings, thin-wall structures and multi-angle precision features, providing a reliable process foundation for future batch production of similar automation equipment components.