Product Overview
As smart manufacturing upgrades accelerate, industrial robots face urgent demands for structural lightweighting to improve cycle speed, positioning accuracy and payload-to-weight ratio. Carbon fiber reinforced polymer (CFRP) board, laminated from PAN-based carbon fiber and epoxy resin, has a density of only 1.5–1.6 g/cm³ — about one-fifth of steel and three-fifths of aluminum — yet delivers far greater specific strength and specific stiffness than metals. Dongguan Chaorong Electronics Co., Ltd. supplies carbon fiber board in 1K–12K tow, 3 mm–20 mm thickness and unidirectional/woven layup configurations, with CNC precision machining and metal-insert embedding for lightweight applications such as robot arm links, AGV/AMR chassis and automation equipment frames.
Core Technical Features
1. Outstanding Specific Strength and Specific Stiffness
Carbon fiber board achieves axial tensile strength of 1500–3500 MPa — far exceeding aluminum alloy (~300 MPa) and structural steel (~600 MPa) — with an elastic modulus of 100–200 GPa and specific stiffness (modulus/density) more than 4× that of steel. Using CFRP for robot arm links and arm panels significantly reduces the inertia of moving parts without sacrificing rigidity, enabling faster acceleration/deceleration, less end-effector vibration and higher repeatability.
2. Extremely Low Thermal Expansion
Along the fiber direction, CTE can be as low as −1.0 to +1.0 × 10⁻⁶/°C versus 23 × 10⁻⁶/°C for aluminum. In high-precision metrology and long-duration continuous automation, carbon fiber structures are virtually immune to thermal drift, helping maintain micron-level positioning stability.
3. Corrosion Resistance and Fatigue Performance
CFRP resists acids, alkalis and corrosion, outlasting metals in humid, oily and cleanroom environments. Its fatigue limit is approximately 60%–70% of static strength versus 30%–50% for steel — well suited to the high-frequency reciprocating duty of industrial robots.
4. Design Flexibility and Electromagnetic Neutrality
Layup direction and thickness can be engineered to reinforce specific load paths. Carbon fiber is also electromagnetically neutral — it does not interfere with sensors or wireless communication — making it ideal for integration into precision automated lines.
Typical Applications
| Component | Thickness | Layup | Key Benefit |
|---|---|---|---|
| Robot arm links / arm panels | 4–10 mm | Mainly unidirectional | 40%–60% weight reduction, faster cycles |
| AGV/AMR chassis | 6–12 mm | Woven + unidirectional | Lower weight, longer battery life |
| Automation equipment frames | 3–8 mm | Woven | High rigidity, vibration resistance |
| Precision metrology platforms | 8–20 mm | Symmetric layup | Near-zero thermal deformation |
Robot Arms
Taking a 6-axis collaborative robot as an example: converting the forearm and wrist to carbon fiber board structures reduced end-effector inertia by about 45% and shortened cycle time by 15%–20%, while the improved rigidity reduced end vibration — visibly improving weld and dispensing consistency.
AGV/AMR and Mobile Platforms
As a load-bearing chassis frame, carbon fiber board achieves more than 30% weight reduction compared with aluminum frames at equal load capacity — directly translating into longer battery runtime and higher payload.
Selection Guide and Machining Recommendations
Defining Key Parameters
- Identify load directions: unidirectional board is strongest along the fiber direction — match it to the main load path; choose woven board for multi-directional loads.
- Define thickness and tolerance: Chaorong's CNC machining holds thickness tolerance within ±0.1 mm and flatness within ≤0.3 mm/m.
- Metal joining design: pre-embed aluminum/stainless-steel inserts or use epoxy bonding plus mechanical fastening — avoid direct tapping, which causes delamination.
- Surface protection: for outdoor or abrasion service, add UV coating or localized encapsulation to improve wear and aging resistance.
CNC Machining Recommendations
- Use diamond or carbide-coated tools with high speed and low feed to minimize burrs and delamination.
- Drill with a backing plate and peck-drilling to prevent exit-side delamination.
- For volume parts, perform first-article CMM inspection of hole positions and geometric tolerances before mass production.
Why Choose Dongguan Chaorong Electronics
Dongguan Chaorong Electronics Co., Ltd. operates a dedicated composite machining line with full inspection capability, offering build-to-print customization, structural simulation advice, CNC precision machining and insert embedding as a one-stop service for carbon fiber board. With batch-traceable raw materials and 100% finished-part inspection, we deliver high-consistency lightweight structural components to robot and automation equipment manufacturers — helping raise the quality and efficiency of modern manufacturing.