CNC Turning Parts CNC Precision Parts for Electronic Devices

Manufacturing Service Progress for CNC Precision Parts in Electronic Devices:

Consultation and Quotation

Customer Requirements Submission: Typically 2D/3D CAD files (e.g., STP, IGS, DWG formats), technical drawings (including tolerances, material, surface finish requirements), quantity, and expected delivery time.

Technical Review & Feasibility Analysis: The supplier conducts a detailed technical review of the client's design to assess its feasibility for CNC machining. This includes:

1) Design for Manufacturability (DFM) Analysis: Identifying potential manufacturing challenges and proposing improvements to optimize the design, reduce costs, and enhance production efficiency and product quality.

2) Material Recommendations: Suggesting suitable materials (e.g., aluminum alloys, stainless steel, copper, titanium alloys, engineering plastics) based on the part's function and application environment.

3) Surface Finish Recommendations: Offering various surface treatment options (e.g., anodizing, electroplating, sandblasting, brushing, polishing, PVD coating) as per requirements.

4) Cost Calculation & Quotation: Providing a detailed quotation and delivery lead time based on factors such as design complexity, material, machining time, surface treatment, inspection requirements, and quantity.

Material Procurement & Preparation

1) Raw Material Procurement: Sourcing high-quality raw materials according to the part's material requirements, followed by strict incoming inspection to ensure compliance with standards.

2) Material Pre-treatment: May include material cutting, heat treatment (e.g., annealing, quenching), etc., to prepare for subsequent precision machining.

CNC Precision Machining

1) Machine Setup & Debugging: Clamping the raw material onto the CNC machine (e.g., CNC lathe, machining center), installing appropriate tools, and debugging machine parameters.

2) First Article Inspection: Before formal batch production, one or more first articles are usually machined and subjected to comprehensive dimension and quality inspection to ensure correct programming and settings.

3) Batch Processing: The CNC machine automatically processes the raw material according to the preset program, gradually forming the desired shape and size through cutting, drilling, milling, and other operations. The entire process is highly automated, ensuring high precision and repeatability.

4) Process Monitoring: During processing, we continuously monitor the machine's operation, tool wear, and machining quality, making timely adjustments and troubleshooting.

Post-Processing & Surface Finishing

Deburring & Cleaning: After machining, parts are deburred to remove sharp edges produced during the process and cleaned to remove cutting fluid and debris.

Surface Treatment: Various surface treatments are applied according to client requirements, such as anodizing (for aluminum parts, improving corrosion resistance and aesthetics), electroplating, sandblasting, brushing, polishing, PVD coating, heat treatment, etc. These treatments can enhance the part's wear resistance, corrosion resistance, electrical conductivity, or appearance.

Quality Inspection

1) Dimensional Inspection: Using high-precision measuring equipment (e.g., CMM, vision measuring machines, calipers, micrometers, height gauges) for comprehensive inspection of the part's dimensions, tolerances, and geometric tolerances, ensuring compliance with drawing requirements.

2) Visual Inspection: Checking the part's surface for scratches, deformation, defects, etc., to ensure aesthetic quality.

3) Performance Testing (if required): For parts with special applications, performance tests such as hardness testing, roughness testing, or electrical conductivity testing may also be required.

4) Factory Inspection Report: Preparing a detailed quality inspection report, documenting measurement data and results.

Common Materials in producing CNC Turning Parts CNC Precision Parts for Electronic Devices:

When producing CNC turned and precision parts for electronic devices, material selection is crucial as it directly impacts the part's function, performance, and reliability within the electronic system. At the same time, CNC machining itself offers unique characteristics that make it highly suitable for these applications.

When choosing materials, factors like electrical conductivity, thermal conductivity,  strength, weight, corrosion resistance, and cost are typically considered.

Metal Materials

Aluminum Alloys (e.g., 6061, 7075)

(1) Lightweight: High strength-to-weight ratio, critical for portable or space-constrained electronic devices.

(2) Good Electrical Conductivity: While not as good as copper, it's sufficient for many grounding or structural applications.

(3) Excellent Thermal Conductivity: Ideal for heat sinks, enclosures, and other components requiring efficient heat dissipation. For instance, aluminum is frequently used to make heat sinks in computers, LED lighting, and power electronics.

(4) Corrosion Resistance: Forms a protective oxide layer, which can be further enhanced through anodizing.

(5) Excellent Machinability: Relatively soft and easy to machine, leading to quicker cycle times and lower costs.

(6) Aesthetic Appeal: Easily anodized in various colors for visual appeal in smartphone casings, laptop bodies, etc.

Common Applications: Enclosures, heat sinks, brackets, structural components, bezels, connectors (with proper plating).

Stainless Steel (e.g., 303, 304, 316)

(1) High Strength & Durability: Excellent mechanical properties, suitable for parts requiring resilience and a long lifespan.

(2) Excellent Corrosion Resistance: Contains chromium, forming a passive layer that protects against rust and corrosion, especially in humid or harsh environments.

(3) Temperature Resistance: Can withstand high temperatures.

(4) EMI Shielding: Provides good electromagnetic interference (EMI) and radio frequency interference (RFI) shielding.

(5) Good Machinability (especially 303): While generally harder than aluminum, certain grades like 303 are specifically designed for improved machinability.

Common Applications: Connectors, fasteners, shafts, internal structural components, medical device housings (for electronics), shielded enclosures, hardware.

Brass (e.g. C360)

(1) Excellent Electrical Conductivity: High copper content makes it a good conductor.

(2) Good Thermal Conductivity: Aids in heat dissipation.

(3) Excellent Machinability: Known as "free-machining brass," it allows for rapid and precise machining, leading to cost-effective production of intricate parts.

(4) Corrosion Resistance: Good resistance to corrosion.

Common Applications: Electrical connectors, terminals, switches, screw machine parts, fittings, waveguides.

Copper (e.g., C110 ETP, C101 OFHC)

(1) Outstanding Electrical Conductivity: The best electrical conductor among common engineering metals (after silver), making it ideal for high-performance electrical contacts.

(2) Excellent Thermal Conductivity: Superb for heat transfer applications.

(3) Ductility & Malleability: Can be drawn into thin wires and formed into complex shapes.

(4) Corrosion Resistance: Good natural corrosion resistance, often further enhanced by plating.

Common Applications: Electrical contacts, busbars, heat exchangers, circuit board components, high-current connectors, waveguides, RF components.

Engineering Plastics

ABS (Acrylonitrile Butadiene Styrene)

(1) Good Impact Resistance & Toughness: Durable and can withstand impacts, even at low temperatures.

(2) Lightweight: Lower density compared to metals.

(3) Good Electrical Insulating Properties: Non-conductive, suitable for housings and insulating components.

(4) High Rigidity & Dimensional Stability: Maintains shape well over time.

(5) Cost-effective: Generally more affordable than high-performance plastics or metals.

Common Applications: Electronic housings, consumer product components, keyboard keycaps, prototypes.

Why choose our company?

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.