Custom Aluminum CNC Machining Services

High-strength alloys like 7075 and 2024 are particularly susceptible due to their residual stresses, though all aluminum alloys can experience deformation without proper machining protocols.

A: Deformation in thin-walled aluminum parts during machining is usually caused by excessive heat, cutting forces, and clamping pressure. To avoid this, the cutting speed and feed rate should be reduced to minimize heat generation. Additionally, the toolpath should be designed to avoid prolonged contact with the thin wall to reduce cutting forces and heat buildup. Using climb milling can help decrease heat and reduce tool vibrations, which aids in improving precision. A sharp tool effectively reduces friction and heat generation, so maintaining tool sharpness is crucial. The use of coolant can assist in cooling the part and preventing thermal deformation. The fixture should be secure but not overly restrictive, as improper clamping may induce stress. Custom fixtures or soft jaws can gently secure the part, reducing the risk of thin-wall deformation. Ensuring machine stability is important to prevent vibration from affecting the thin wall. A well-planned machining sequence, where thicker sections are processed first, helps to distribute stress evenly, with the thin wall being processed last. Post-machining heat treatment or straightening processes can help eliminate internal stresses, further ensuring part accuracy. By implementing these methods, deformation in thin-walled aluminum parts can be effectively avoided, maintaining machining quality.

A: Yes, through our multi-stage machining approach with intermediate stress-relieving cycles, we consistently produce large aluminum components with flatness tolerances under 0.1mm/m.

A: In CNC machining, the tolerance of aluminum parts typically depends on the machining process and equipment accuracy. For standard CNC milling or turning, common tolerances range from ±0.05mm, with precision machining reaching ±0.02mm. With high-precision equipment and careful control, tolerances can be tightened to ±0.01mm, especially for complex parts and critical dimensions. Using 5-axis CNC machines or Swiss-type lathes can further improve tolerances to as tight as ±0.005mm. It’s important to note that factors such as material selection, tool sharpness, machine stability, and machining sequence all impact the final tolerance. For parts requiring precise fitting, the tolerance may need to be even tighter, typically around ±0.01mm or smaller. Additionally, surface treatment and assembly requirements can influence the tolerance specifications.

A: Several grades are popular for Aluminum CNC Machining due to their machinability and strength. 6061-T6 is the most common choice because it is versatile, affordable, and suitable for both prototyping and production. 7075 aluminum is often used when high strength is required, such as in aerospace components. 2024 offers excellent fatigue resistance, while 5052 is preferred for sheet metal parts. Choosing the right alloy ensures better performance and efficiency during Aluminum CNC Machining.