Construction machinery (welding collaborative robot for excavator chassis welding)
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The collaborative welding robot is an intelligent welding system specifically designed for heavy‑duty structural components in construction machinery. It excels at automating the welding of thick‑plate, high‑load parts such as excavator undercarriages, booms, sticks, track frames, supports, and counterweight brackets, seamlessly meeting the stringent process requirements of construction equipment—namely, substantial material thickness, high load capacity, and robust weld strength. Addressing industry challenges—including complex undercarriage geometries, long weld seams, numerous stress points, significant distortion from manual welding, poor consistency, and high labor intensity—the robot leverages its core strengths in flexible collaboration, high‑precision fusion welding, and continuous, stable operation to deliver standardized, intelligent, and high‑quality welding of excavator undercarriage assemblies. It stands as a pivotal smart solution for mass production, remanufacturing, and precision finishing of construction‑machinery components.
The equipment is compatible with all types of excavator undercarriages made from thick‑plate materials, including high‑strength structural steel, wear‑resistant steel plates, and thickened carbon steel—materials specifically designed for construction machinery. It can perform the full range of operations, such as splicing and welding the undercarriage main frame, reinforcing suspension brackets, welding cylinder bases, filling welds on track frames, fusing reinforcement plates to the undercarriage, and repairing and refurbishing cracks in used components. Compared with traditional manual methods and conventional fixed‑type robots, collaborative robots require no complex tooling or time‑consuming programming; they support drag‑and‑drop teach‑in and rapid waypoint memorization, enabling flexible adaptation to mixed‑line production of multiple excavator models and specifications. This allows for quick changeovers and exceptional flexibility, effectively addressing the challenges of diverse component part numbers, variable batch sizes, and high mold‑change costs in the construction machinery industry.
Equipped with a precision arc‑welding system, this equipment is tailored to the welding requirements of thick plates in excavator undercarriages. It employs an intelligent multi‑layer, multi‑pass welding process, full‑penetration groove welding, and segmented symmetrical welding, enabling precise control of welding current, penetration depth, and heat input. This effectively prevents common defects such as incomplete penetration, slag inclusion, cracking, weld distortion, and stress concentration in thick‑plate joints. The machine delivers highly accurate and stable weld paths, producing full, uniform weld beads with thorough fusion—free of false or missed welds. The resulting welds meet stringent standards for tensile strength, impact resistance, and fatigue performance, perfectly satisfying the demanding operating conditions of excavator undercarriages subjected to heavy loads, rough terrain, and high‑intensity service. By addressing these challenges at the process level, the system ensures the structural rigidity and load‑bearing stability of the undercarriage.
The system delivers outstanding safety and collaborative performance, enabling seamless human–robot collaboration without the need for separate isolation zones. With a compact footprint, flexible deployment, and an intuitive learning curve, it significantly boosts workshop space utilization and production efficiency. The equipment supports 24/7 continuous, stable operation, ensuring exceptionally high welding consistency and completely eliminating the issues of inconsistent manual weld quality, low first‑pass yield, and high rework rates, thereby effectively reducing consumable waste and labor costs. Post‑weld, the chassis exhibits symmetrical geometry with minimal distortion, eliminating the need for extensive alignment and grinding and greatly streamlining downstream processes.
It is suitable for a wide range of applications, including mass production of new excavator undercarriages, welding and machining of construction‑equipment components, refurbishment and repair of aging undercarriages, and structural reinforcement and modification. With its core advantages—high welding precision, stable structural strength, exceptional flexibility, low failure rates, and significant cost reduction and efficiency gains—it fully meets the stringent production requirements of the construction‑equipment industry, providing a reliable, intelligent welding process that ensures superior structural integrity, operational safety, and product durability for excavator undercarriages.
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6th Floor, Workshop 3, Hongxiang Standard Factory Building, No. 2 Hongli Road, Nanning, Guangxi, China
