CNC Brass Turning Parts for Decorative Architectural Use

Service Process for CNC Brass Turning Parts for Decorative and Architectural Use

For CNC brass turned parts used in decorative and architectural applications, the service process places a special emphasis on surface treatment and aesthetic quality. Here is a typical service workflow:

1. Design Consultation and Drawing Review

(1) Client Communication: The client provides the product concept, intended use, and aesthetic requirements. The service provider will engage in a detailed discussion about design feasibility, material selection, and surface finishes based on these needs.

(2) Drawing Review: The client provides 2D engineering drawings and 3D model files. The service provider will meticulously review the drawings to ensure all dimensions, tolerances, and surface requirements are clear. For decorative parts, surface roughness (Ra) and the final surface treatment effect are key points of review.

2. Material Selection and Procurement

(1) Brass Grade Selection: The appropriate brass grade is selected based on the client's requirements for color, hardness, and corrosion resistance. For example, H59 brass (brass rod) is commonly used for its good machinability and cost-effectiveness, while brass with a higher copper content, such as H62 or H65, might be used for products with stricter color requirements.

(2) Material Procurement: High-quality brass rods or tubes are sourced from a reliable supplier.

3. CNC Turning 

(1) Programming: An engineer uses CAM software to program the machine, precisely controlling the tool path to ensure the part's dimensional accuracy and surface finish.

(2) Turning: The brass rod is loaded into a CNC lathe for turning, drilling, and tapping operations. To ensure the final surface quality, multiple passes are often used, with the final pass being a finishing cut to achieve the best possible surface effect.

4. Surface Treatment (Crucial)

(1) Polishing: Mechanical or vibratory polishing methods are used to remove machining marks and give the part a smooth or mirror-like finish.

(2) Brushing/Satin Finishing: If the client requires a matte or textured effect, a brushing process is performed.

(3) Plating: A layer of a protective or decorative metal, such as chrome, nickel, or gold, is plated onto the brass surface to change its color and improve its hardness and corrosion resistance.

(4) Passivation or Anti-Oxidation Treatment: Brass is prone to oxidation and tarnishing in the air, so passivation or a transparent protective coating is applied to maintain its original luster.

5. Quality Inspection and Packaging

(1) Visual Inspection: Each part undergoes a strict visual inspection to ensure there are no scratches, burrs, or other surface defects.

(2) Dimensional Inspection: Key dimensions are spot-checked or fully inspected using calipers, micrometers, or a Coordinate Measuring Machine (CMM).

(3) Custom Packaging: Since these parts are often for high-end products, specialized protective packaging is used to prevent damage during transport.

Common Materials in producing CNC Brass Turning Parts for Decorative and Architectural Use

1. H59 Brass (C36000)

Material Characteristics: Known as "free-machining brass," it contains a small amount of lead, giving it excellent cutting performance and good chip-breaking properties. It's also very cost-effective.

Corresponding Processing Features:

(1) High-Efficiency Production: Due to its superior machinability, H59 can be processed at high speeds and volumes on a CNC lathe, making it ideal for the mass production of parts like door handles, nuts, and standard fittings.

(2) High Precision: The consistent cutting properties lead to stable tool forces, allowing for easy achievement of micron-level dimensional accuracy.

2. H62 Brass (C28000) and H65 Brass (C27000)

Material Characteristics: These grades have a higher copper content, resulting in a more pronounced golden or deep gold color. They have good ductility but are slightly less machinable than H59.

Corresponding Processing Features:

(1) Superior Aesthetic Appearance: The natural color of these brass grades is highly decorative. Precise CNC turning can achieve a very smooth surface, which is the foundation for subsequent mirror polishing or satin finishing, meeting the visual requirements of high-end architectural and decorative pieces.

(2) Diverse Surface Treatments: Due to their good chemical stability, they can undergo various plating processes (chrome, gold plating) or anti-oxidation treatments to change color or extend service life. These treatments further enhance the decorative value of the product, such as for luxury lighting or furniture fittings.

3. Common Processing Features

(1) Surface Finish: Regardless of the brass grade used, CNC turning provides an ideal starting point for subsequent polishing or brushing. This is crucial for all decorative and architectural applications, as the final appearance directly determines the product's market value.

(2) Combination of Function and Aesthetics: Brass's good mechanical properties allow it to serve a functional purpose while also being decorative. For example, when used for faucets, valves, or door handles, the precise dimensions from CNC machining ensure smooth operation, while the brass material itself provides both beauty and corrosion resistance.

Why Choose we for CNC Brass Turning Parts for Decorative and Architectural Use?

1. Expertise in Aesthetics and Surface Finishing

Superior Surface Treatments: We offer a range of high-quality finishing services, including mirror polishing, brushing, electroplating, and anti-oxidation treatments. They understand the impact of each process on the final visual outcome, ensuring beauty and longevity.

Seamless Material-Process Integration: We can recommend the ideal brass grade (like H62 or H65) based on the client's desired color and luster. This is combined with precise CNC turning to create the perfect foundation for subsequent surface treatments.

2. Strict Quality Control and Precision

(1) Dual-Layer Inspection: Beyond standard dimensional checks (using CMMs), we perform strict visual inspections to ensure there are no scratches, burrs, or other aesthetic flaws. This is critical for high-end projects.

(2) Material Traceability: We may provide material certifications, ensuring the brass meets specific standards. This is essential for large-scale architectural projects or products designed for long-term use.

3. One-Stop Service and Project Management

(1) Design Optimization: We are a partner, not just a manufacturer. We can offer valuable advice to optimize a design for both aesthetics and manufacturability, helping to balance beauty, function, and cost.

(2) Efficient Project Coordination: With all stages—from machining to post-processing—handled in-house or by strictly controlled partners, we significantly simplify the client's supply chain and ensure on-time delivery.

Waltay is specializing in custom CNC machined parts for over 15 years. We are good at making high precision metal and plastic components. We also provide one stop service such as part design, prototypes, mold making, plastic injection and part assembling to better meet customers’ needs. Beside aluminum CNC machined parts, we also provide stainless steel, ABS, PC, PA,PP and POM CNC machined parts which can be widely used in cables, sensors, motors,connectors, etc.