ABB 3HAC035802-001 Robot Bar Assembly – IRB360 FlexPicker

ABB 3HAC035802-001 — Kinematic Forearm Bar Assembly for IRB360 FlexPicker Delta Robot

The ABB 3HAC035802-001 is the OEM forearm bar assembly designed exclusively for the IRB360 FlexPicker series of delta (parallel kinematic) robots. Within the IRB360’s three-chain parallel architecture, this component constitutes one complete forearm pair — two carbon-fiber-reinforced rods with precision spherical joint ends — that transmits actuator torque from the upper arm to the central moving platform. Dimensional accuracy and joint-end integrity of this assembly are the primary determinants of TCP (Tool Center Point) repeatability across the robot’s full working envelope. Any deviation in rod length, joint-pin bore diameter, or spherical seat geometry propagates directly into path error at the end-effector, making OEM-specification replacement the only viable option for production-grade installations.

This listing covers one bar assembly set (two rods, part number 3HAC035802-001, cross-referenced with 3HAC025466-001 and 3HAC029024-001). A complete mechanical rebuild of the IRB360 forearm structure requires three sets — one per kinematic chain. Units are sourced through verified ABB distribution channels, inspected for dimensional compliance, and dispatched from Xiamen, China with full traceability documentation.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The IRB360 FlexPicker operates on a symmetric three-chain delta topology. Each kinematic chain consists of an upper arm driven by a servo motor at the base frame, connected via spherical joints to a forearm bar pair (the 3HAC035802-001 assembly), which in turn connects to the central moving platform. The controller executes closed-form inverse kinematics in real time — at cycle rates up to 150 picks/min — computing the required joint angles for each of the three motors simultaneously to achieve the commanded TCP position and orientation.

The forearm bar assembly’s structural role is to act as a rigid, length-stable tension-compression member. CFRP construction is specified for three reasons: (1) the material’s high specific stiffness (Young’s modulus ~70 GPa at 1.6 g/cm³ density) minimizes elastic deflection under dynamic loading, preserving TCP accuracy at high acceleration; (2) the near-zero coefficient of thermal expansion (~1–2 × 10⁻⁶ /°C axially) prevents thermally induced length drift across the operating temperature range, which would otherwise introduce systematic TCP offset; (3) the low mass reduces the inertial load on the upper-arm servo drives, allowing higher peak accelerations without exceeding motor torque limits.

The spherical rod-end bearings at each joint accommodate the angular misalignment inherent in the delta mechanism’s geometry as the platform traverses its working envelope. Fretting wear at the spherical seat is the primary failure mode in service — typically manifesting as increased backlash, audible joint noise, and degraded TCP repeatability. The OEM 3HAC035802-001 assembly uses hardened steel spherical inserts with a PTFE-impregnated liner to extend service life under high-cycle conditions. Aftermarket substitutes frequently omit the liner, accelerating wear onset by a factor of 2–4× under equivalent duty cycles.

From an EMC perspective, the CFRP tube is electrically non-conductive, which eliminates the bar assembly as a ground-loop path between the robot base and the moving platform. This is relevant in installations where the end-effector carries sensors or vision systems with their own grounding requirements — the non-conductive forearm prevents common-mode interference from coupling through the mechanical structure into signal wiring routed along the arm.

System Integration Benefits

• Zero-adjustment installation: OEM rod length tolerance of ±0.05 mm ensures the kinematic chain geometry is restored to factory specification without field shimming, re-calibration of the base frame, or TCP re-teaching beyond a standard verification cycle.
• Controller-transparent replacement: No firmware updates, parameter changes, or axis re-commissioning are required. The IRC5 and OmniCore controllers detect no mechanical change at the software level — the robot resumes production after a standard TCP verification.
• Deterministic cycle-time recovery: Because path accuracy is restored to OEM specification, the motion planner can operate at its programmed acceleration and velocity limits without the conservative de-rating that engineers typically apply to compensate for worn bar assemblies.
• Reduced unplanned downtime: Pre-inspected joint pins and spherical seats eliminate the most common incoming-quality failure mode. Each unit is verified for joint-pin torque and rod-end play before dispatch, reducing the probability of a DOA (dead-on-arrival) replacement part.
• Symmetric stiffness restoration: Replacing bars in matched pairs per kinematic chain (as ABB recommends) ensures all three chains have identical compliance characteristics, preventing the asymmetric TCP drift that occurs when chains have mixed wear states.
• Hygienic environment compatibility: The anodized aluminum end fittings and CFRP tube surface are compatible with standard food-industry cleaning agents (pH 4–10) and brief washdown exposure, supporting use in IP69K-rated IRB360 configurations without material degradation.
• Traceability for regulated industries: Each unit ships with an inspection record and original ABB part label, supporting the documentation requirements of FDA 21 CFR Part 11, EU GMP Annex 11, and ISO 13485 quality systems in pharmaceutical and medical-device manufacturing lines.
• Predictable maintenance scheduling: Under standard duty (≤150 picks/min, within payload specification), the OEM bar assembly has a documented service interval of 8,000–15,000 operating hours, enabling planned replacement during scheduled maintenance windows rather than reactive replacement after a production stop.

Quality Assurance & Global Logistics

All 3HAC035802-001 units supplied by siemensplc.com are sourced through verified ABB distribution channels or authenticated OEM surplus. Incoming inspection covers: visual examination for surface damage, dimensional check of rod length (±0.05 mm tolerance), joint-pin bore diameter verification, and spherical seat play measurement. Units failing any criterion are quarantined and not listed for sale. Counterfeit risk is mitigated by reviewing ABB part labels, date codes, and material batch traceability on every inbound shipment. Stock is held in a climate-controlled warehouse in Xiamen, China — no field-returned or refurbished units are mixed into new stock.

Logistics are managed from Xiamen, Fujian Province, China — a major international freight hub with direct access to DHL, FedEx, UPS, and TNT express networks. Standard air freight delivery: 5–10 business days to most destinations. Express (DHL/FedEx Priority): 2–4 business days. EXW Xiamen terms are available for customers with established freight forwarder relationships. All shipments use ESD-safe inner packaging and impact-resistant outer cartons rated for air freight handling. Export documentation (commercial invoice, packing list, certificate of origin) is prepared to the importing country’s customs requirements. HS Code 8473.30 applies for most jurisdictions.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, Fujian, China
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