CNC-Machined Triathlon Bike Frame Joint

CNC-Machined Triathlon Bike Frame Joint enables controlled force transfer between composite tubes by maintaining consistent interface geometry across mating surfaces. Precision-machined contact zones minimize local stress risers, reducing risk of micro-cracking under asymmetric pedaling and aerodynamic torsion. This joint architecture supports balanced axial and radial load paths throughout the frame. 

Material Grade

6061-T6/7075-T6 Aluminum (aero), Ti-6Al-4V Titanium (ELI grade), UD Carbon Fiber (hybrid joints)

Joint Interface Geometry

Tube Ø – 28–50 mm (±0.05 mm), Angles – ±0.1°, Mating Profiles – H7/h6 fit

Dimensional Tolerances

Critical Alignment – ±0.1 mm/m, Overall Length – ±0.2 mm

Surface Finish

External – Ra ≤ 0.4 µm (aero), Internal – Ra ≤ 1.6 µm (bonding), Welding Zones – Ra ≤ 0.8 µm

Wall Thickness Uniformity

±0.1 mm (for 1.5–3.0 mm walls), ±5% (for carbon fiber joints)

Product Description

CNC-Machined Triathlon Bike Frame Joint preserves strict angularity and coaxiality in tube junctions, essential for drivetrain axis stability and steering response. Tolerances held within ±5 microns prevent cumulative misalignments during bonding, maintaining mechanical symmetry from bottom bracket through head tube. Assembly errors from tube deflection or thermal distortion are effectively nullified. 

Stress Relief/Heat Treatment

T6 Solutionizing (Al), Annealing (Ti), Post-Cure (CFRP), Residual Stress – ≤50 MPa

Burr-Free Requirements

Internal Passages – ≤0.05 mm burr, Deburred Edges (mechanical/chemical)

Weight/Mass Tolerance

±5 g (for joints <100 g), ±1% (for structural components)

Mounting Point Accuracy

Cable Stops – ±0.2 mm, Bottle Cage – ±0.3 mm, Aero Bars – ±0.15 mm

Certification Standard

ISO 4210 (Bicycle Safety), AS9100 (Aerospace), ISO 9001, EN 10088 (Corrosion Resistance)

Technical Advantages

CNC-Machined Triathlon Bike Frame Joint is topologically optimized to minimize non-functional material without compromising mechanical strength. Localized wall thickness variation and internal stress flow simulation guide chip removal, ensuring minimal inert mass while maintaining moment stiffness. This results in a net structural mass reduction compared to overbuilt cast or molded alternatives. 

CNC-Machined Triathlon Bike Frame Joint features engineered surface topology with micron-level roughness control to promote uniform adhesive wet-out and cohesive bond formation. Integrated micro-features increase interfacial area and resin keying efficiency, significantly improving shear strength under thermal and vibratory cycling. Fatigue durability exceeds thresholds for multi-season triathlon use. 

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Industry Applications

Carbon Composite Frame Integration

Used to join carbon tubes with precise geometry, ensuring uniform stress distribution and preventing delamination under torsional and axial loads. 

High-Performance Time Trial Bicycles

Enables frame joint precision for aerodynamic alignment and mechanical efficiency during extended high-speed, low-cadence time trial applications. 

Aerospace-Inspired Frame Prototyping

Applied in small-batch frame builds using aerospace tolerances for accurate load path simulation and fatigue testing in extreme use conditions. 

Wind Tunnel-Optimized Frame Structures

Supports repeatable assembly for frames tested under aerodynamic flow simulations where joint misalignment impacts drag coefficient and ride dynamics. 

Multi-Material Frame Bonding Systems

Facilitates bonding between dissimilar materials like carbon fiber and aluminum, maintaining mechanical compatibility and mitigating thermal expansion mismatch. 

Custom Geometry Triathlon Frames

Allows precise tube angle configuration and joint alignment in custom-fit frames tailored for athlete-specific anthropometric and kinematic data. 

 

Vibration Damping Interface

CNC-Machined Triathlon Bike Frame Joint can be engineered with internal damping chambers or elastomeric inserts to decouple high-frequency vibration modes. This enhances ride comfort without compromising joint stiffness, allowing end-users to maintain aerodynamic position longer during sustained efforts. 

CNC-Machined Triathlon Bike Frame Joint is treated with selective anodization or conversion coating matched to the operational environment. These treatments prevent galvanic interaction with adjacent carbon fiber components and resist sweat-induced degradation in triathlon use cases. 

CNC-Machined Triathlon Bike Frame Joint

Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does Frigate ensure dimensional repeatability in CNC-Machined Triathlon Bike Frame Joints across multiple production batches?

Frigate uses precision 5-axis CNC machines with closed-loop probing systems to maintain dimensional consistency within ±5 microns. Each batch undergoes in-process metrology using CMM inspection. Toolpath variation is controlled through NC code standardization and thermal compensation algorithms. This ensures joint geometries remain uniform across all units produced. 

What materials does Frigate select for CNC-Machined Triathlon Bike Frame Joints to optimize fatigue resistance?

Frigate commonly uses aerospace-grade aluminum alloys like 7075-T6 and titanium grades like Ti-6Al-4V. These materials are chosen for their high fatigue limits and low creep under dynamic stress. Material batches are verified with spectrographic analysis and hardness testing before machining. Post-machining stress relief processes are applied to ensure microstructural stability. 

How does Frigate machine interfaces for carbon tube bonding in CNC-Machined Triathlon Bike Frame Joints?

Frigate incorporates micro-grooved bonding surfaces with Ra values tailored for epoxy and urethane adhesives. These features are CNC-machined rather than etched to ensure uniformity across joints. Bonding surfaces are isolated during anodizing to preserve adhesive compatibility. This approach increases bond strength and reduces failure risk in dynamic loading. 

How does Frigate handle thermal expansion issues between metal joints and carbon tubes?

Frigate designs CNC-Machined Triathlon Bike Frame Joints with finite element models that simulate thermal cycling under real-world conditions. Joint geometries are optimized to accommodate expansion deltas between aluminum and carbon fiber. Material pairings are selected based on matched coefficients of thermal expansion. Adhesive layer thickness is controlled to absorb mismatch-induced shear. 

What quality control methods does Frigate use for verifying CNC-Machined Triathlon Bike Frame Joint integrity?

Frigate implements coordinate measurement machine (CMM) inspection for all critical datums and load-bearing surfaces. Surface finish is validated using profilometers, and bonding areas are checked under microscopy. Parts undergo nondestructive testing like dye penetrant inspection to detect microcracks. Each joint is traceable by serial number with full inspection logs. 

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LOCATIONS

Global Sales Office

818, Preakness lane, Coppell, Texas, USA – 75019

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

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