High-precision Components For Humanoid Robots, Aerospace, And The Medical Industry—a Testament To Our Micron-level Precision Capabilities

±0.005mm tolerance, single-step electrochemical machining, 100% traceability-we are not just an ordinary machining shop. Backed by a research institute, we possess a full range of manufacturing equipment, including imported lathes, 3-, 4-, and 5-axis machining centers, electrochemical machining (ECM) centers, EDM machines, wire EDM machines, laser welding systems, and gear hobbing/shaping machines, as well as a comprehensive inspection system comprising Zeiss coordinate measuring machines and GOM blue light inspection systems. We are certified to ISO 9001, IATF 16949, and AS9100D. We focus on three areas: humanoid robots, aerospace, and medical devices.

Component Types:
Planetary Carriers, Output Flanges, Rotor Supports, Enclosures, End Caps.

Key Technical Difficulties:

High-precision assembly based on complex dimensional stack-ups.

Distortion control for thin-walled parts (1.0–2.5mm) during clamping.

Stringent mass-production stability (CPK ≥ 1.33).

High-strength materials: 7075-T6 Al / 40Cr Steel.

Machining Resources:

Precision Lathes: Shafts and flanges.

Multi-axis Machining Centers (3/4/5-axis): Irregular apertures and side profiles.

High-precision Slow-speed Wire EDM: Complex slotting and fine-finishing.

1. Technical Challenges:

True Position Tolerance: The position tolerance for the three sets of planet gear shaft holes is required to be within Φ0.01 mm.

Cylindricity: The cylindricity of the shaft holes must be within 0.003 mm.

Material Characteristics: Made of 7075-T6 aluminum alloy; highly susceptible to deformation caused by residual stress release after machining.

2. Process Route:
Rough Machining (Machining Center - Stock Removal) → Aging Treatment (Stress Relief) → Finish Machining (Machining Center - Shaft Holes & End Faces) → Slow-speed WEDM (Critical Slots) → Full CMM Inspection (Coordinate Measuring Machine)

3. Solutions

4. Delivery

Production Capacity: 800 units/month

Yield Rate: 94%

CPK: 1.38

1. Technical Challenges:

End face runout: 0.005 mm

Mating surface roughness: Ra 0.4

True position of threaded holes: Φ0.05 mm

2. Process Route:
Turning (End Face + OD + ID) → MC Milling (Threaded Holes + Locating Slots) → Deburring → Cleaning → 100% Inspection

3. Solutions

4. Delivery

Production Capacity: 1,200 units/month

Yield Rate: 96%

1. Technical Challenges:

Dynamic balance requirement: Grade G2.5 (High-speed rotating component).

Complex geometry: Multiple irregular weight-reduction slots.

High vibration risk: Non-uniform wall thickness during machining.

2. Process Route:
Lathe Rough Machining (Profile + Weight-reduction Slots) → Aging → Finish Machining (Datums + Bearing Seats) → Dynamic Balancing Test → 100% Inspection

3. Solutions

4. Delivery

Production Capacity: 600 units/month

Yield Rate: 97%

Parts include blades, integral impellers, integral hub assemblies, intake grilles, engine casings, and more.

Direct Machining via Electrochemical Machining (ECM) Center

1. Technical Challenges:

Complex Geometry: Blade profiles are free-form surfaces with a stringent profile tolerance requirement of ±0.025 mm.

Material Hardness: Primarily Titanium Alloy TC4 and Superalloy GH4169; traditional milling leads to excessive tool wear and the risk of forming a recast layer.

Ultra-thin Edges: Leading and trailing edges are only 0.1–0.3 mm thick, making them highly susceptible to deformation or thermal burn-through.

2. Advantages of the ECM Process:

Zero Tool Wear: The cathode is subject to no physical wear, allowing for long-term use after a single design phase.

Superior Material Integrity: Process involves no cutting heat, no mechanical stress, and is completely recast-layer-free.

High Surface Quality: Surface roughness can achieve Ra < 0.1 μm.

Material Versatility: Capable of machining any difficult-to-cut metallic materials, regardless of hardness.

3. Process Route

Cathode Design (based on digital model) → ECM Roughing (85% stock removal) → ECM Finishing (Final profile) → Cleaning → Full CMM Inspection

4. Solutions

5. Inspection Methods

ZEISS CMM: Blade profile scanning and generation of point cloud comparison maps.

GOM Blue Light Scanning: Full-dimensional scanning and generation of CAD deviation color maps.

6. Delivery

Batch Capacity: 200 units/month (typical blade length: 80mm).

Lead Time: 15 working days (after cathode readiness).

First-Pass Yield (FPY): 99%

5-Axis Simultaneous Machining

1. Technical Challenges:

Deep and narrow flow channels: Max aspect ratio of 10:1, leading to poor tool accessibility.

Thin-walled blades: Minimum thickness of 0.8mm, posing a high risk of machining vibration.

Materials: TC4 Titanium Alloy / 7075 Aluminum Alloy.

2. Process Route:
5-Axis Rough Machining (Large-diameter tool roughing) → Stress-relief Aging → 5-Axis Finish Machining (Blades + Flow channels) → Localized Manual Polishing → Full CMM Inspection

3. Solutions

4. Delivery

Typical Specification: Φ150mm Impeller

Batch Capacity: 30 units/month

Lead Time: 20 working days

Yield Rate: 96%

ECM One-step Forming

1. Technical Challenges:

Dense grid structure: Grid wall thickness of 0.5mm with 1.5mm spacing.

Extreme aspect ratio (>20:1): Impossible to process using traditional milling.

Surface finish: Inner wall roughness requirement of Ra 0.8.

2. Process Route:
ECM One-step Forming (Cathode designed for simultaneous machining of all grids) → Cleaning → Inspection

3. Solutions

4. Delivery

Production Capacity: 50 units/month

Yield Rate: 99%

1. Technical Challenges:

Surface Roughness: Flow channel requirement of Ra ≤ 0.1 μm (critical to prevent thrombosis/blood clot formation).

Material & Biocompatibility: TC4 Titanium Alloy with stringent biocompatibility standards.

Complex Geometry: Intricate internal flow channels that are impossible to machine directly via conventional mechanical methods.

2. Advantages of the ECM Process:

Seamless Integration: One-step machining of the entire flow channel with no seams.

Ultra-fine Finish: Surface roughness achievable between Ra 0.05–0.08 μm.

High Integrity: Completely free of tool marks and micro-cracks.

3. Process Route:
5-Axis Rough Machining (Datums + Outer Profile) → ECM Finish Machining (Flow Channels) → Ultrasonic Cleaning → Cleanroom Packaging

4. Solutions

5. Delivery

Batch Capacity: 20 sets/month (Pump body + Impeller)

Lead Time: 25 working days (including electrode design and manufacturing)

Yield Rate: 95%

1. Machining Precision: ±0.005mm (Standard) / ±0.001mm (Specific)
2. Surface Roughness: Ra 0.05μm (ECM Mirror Grade)
3. Key Equipment: Imported lathes, imported 3/4/5-axis machining centers, imported EDM, imported ECM machining centers, slow-speed WEDM, laser welding, gear broaching machines, and gear hobbing machines.
4. Inspection Equipment: ZEISS CMM, GOM blue light scanners, roughness testers, etc.
5. Material Capabilities: Titanium alloys (TC4/TC4 ELI), Superalloys (GH4169), Aluminum alloys (7075/6061), 40CrNiMoA, and Stainless steel (17-4/316L).
6. Certification Systems: ISO9001 / IATF 16949 / AS9100D
7. Technical Endorsement: Supported by research institutes, shared process databases, and an Academician Workstation.
8. Specialized Process: ECM (Electrochemical Machining) integral forming.