Engineering Review: 1500W All-in-one Cobot Station – Turin, Italy

Technical Field Report: Implementation of 1500W All-in-one Cobot Station

Project Overview: Turin Industrial Sector

This report details the operational deployment and performance validation of a 1500W All-in-one Cobot Station at a Tier-2 automotive electrical supplier facility in Turin, Italy. The primary objective was to transition from manual TIG (Tungsten Inert Gas) welding to automated laser processing for high-conductivity Copper Components welding.

Turin’s manufacturing landscape demands high precision within constrained floor spaces. The site presented specific challenges: inconsistent manual weld penetration on busbars and a high scrap rate due to the extreme thermal diffusivity of copper. The introduction of Collaborative Robotics via an integrated station was proposed to standardize the heat input and improve throughput without the footprint of a traditional industrial robot cell.

The Synergy of the All-in-one Cobot Station and Collaborative Robotics

The All-in-one Cobot Station represents a shift from modular, fragmented welding setups to a unified architecture. In this specific Turin installation, the station integrates the 1500W fiber laser source, a dedicated recirculating chiller, the wire feeder, and the robotic controller into a single mobile chassis.

The synergy between this hardware and Collaborative Robotics is critical for “High-Mix, Low-Volume” production environments. Unlike traditional 6-axis robots that require extensive safety fencing and PLC (Programmable Logic Controller) integration, the cobot operates alongside technicians.

1. Reduced Spatial Requirements

In the Turin workshop, floor space is at a premium. The All-in-one Cobot Station eliminated the need for a 10-square-meter safety cage. By utilizing the cobot’s internal force-torque sensors, we established a “collaborative zone” where the operator can manually load copper lugs while the robot executes the previous weld cycle.

2. Intuitive Lead-Through Programming

Traditional robotic welding requires a specialized programmer. By leveraging Collaborative Robotics, our senior welding technicians in Turin were able to “lead the robot by the hand” to define complex weld paths on 3D copper busbar geometries. This reduced setup time from hours to approximately 15 minutes per new component SKU.

Technical Analysis: Copper Components welding

Copper Components welding is notoriously difficult due to two factors: high reflectivity at the 1080nm wavelength and high thermal conductivity (approx. 400 W/m·K). A standard 1500W laser can struggle if the energy density isn’t managed correctly.

Laser Absorption and Wavelength Dynamics

At the Turin site, we utilized a 1500W continuous wave (CW) fiber laser. While green lasers (515nm) are theoretically better for copper absorption, the All-in-one Cobot Station compensates for the 1080nm IR reflectivity by utilizing high power density and specialized “wobble” parameters.

The “Wobble” Functionality

To achieve structural integrity in Copper Components welding, we implemented a circular wobble pattern (frequency: 150Hz, width: 2.0mm). This technique oscillates the beam, creating a wider melt pool and allowing gases to escape, which significantly reduced the porosity issues we initially observed in the oxygen-free copper samples.

Thermal Management in Turin

The 1500W output is the “sweet spot” for 3mm to 5mm copper busbars. Anything less results in “cold” welds because the copper wicks heat away faster than the laser can apply it. The All-in-one Cobot Station allowed us to maintain a constant travel speed of 15mm/s—a speed impossible to maintain manually with the precision required to prevent burn-through or lack of fusion.

Field Observations and Operational Data

During the 14-day validation period in Turin, we monitored several key performance indicators (KPIs).

Weld Consistency and Depth of Penetration

Manual TIG welding on copper often results in a “crown” effect with shallow penetration. The All-in-one Cobot Station achieved a consistent 2.2mm penetration on C11000 ETP copper. The repeatability of Collaborative Robotics (±0.05mm) ensured that the focal point remained exactly at the joint interface, regardless of operator fatigue.

Gas Shielding Optimization

We identified that Nitrogen (N2) was insufficient for high-purity copper applications in this facility. We transitioned to high-purity Argon (Ar) at 20L/min. The All-in-one Cobot Station‘s integrated gas control system was synced to the laser trigger, ensuring 2 seconds of pre-flow and 3 seconds of post-flow, which eliminated oxidation at the weld termination point.

Lessons Learned: Practical Field Adjustments

No technical deployment is without its hurdles. Below are the “lessons learned” from the Turin field site that should be applied to future All-in-one Cobot Station rollouts.

1. The “Back-Reflection” Risk

Copper’s reflectivity is a killer for laser diodes. Initially, the 1500W source triggered a back-reflection alarm when welding at a 90-degree perpendicular angle.
Lesson: We adjusted the cobot head to a 10-degree lead angle. This redirected the reflected energy away from the delivery fiber while maintaining the keyhole stability.

2. Surface Preparation is Non-Negotiable

In the Turin facility, some copper components had residual oils from the stamping process. Laser welding, unlike TIG, does not “burn off” contaminants cleanly; instead, it traps them as micro-porosity.
Lesson: We implemented a mandatory isopropyl alcohol wipe-down protocol. The All-in-one Cobot Station is a precision instrument, not a brute-force tool; it requires clean base metals to function at peak 1500W efficiency.

3. Jigging and Fixturing

Because Collaborative Robotics lacks the massive rigidity of a 500kg industrial arm, the vibrations from the wire feeder can occasionally cause micro-deflections in the torch head.
Lesson: We reinforced the station’s mounting plate and used toggle clamps for the copper workpieces. Stability is the foundation of laser precision.

Comparative Advantage: Why Turin Chose This Setup

The decision to deploy the All-in-one Cobot Station over a standard manual laser welder or a high-end robotic cell came down to the “Total Cost of Ownership” and “Time to Market.”

1. Safety: The collaborative nature allowed the station to be placed directly in the assembly line flow.
2. Quality: Copper Components welding requires a steady hand that no human can provide at 1500W for an 8-hour shift. The cobot doesn’t sneeze; it doesn’t drift.
3. Versatility: As the Turin plant switches from busbars to cooling plates, the All-in-one Cobot Station can be reprogrammed by the local foreman without calling in external consultants.

Conclusion

The Turin deployment confirms that 1500W is the optimal power ceiling for most localized Copper Components welding applications in the automotive electrical sector. The integration of Collaborative Robotics into an All-in-one Cobot Station solves the two biggest hurdles in modern welding: the shortage of highly skilled manual welders and the demand for high-precision, low-footprint automation.

For future installations, focus should remain on perfecting the shielding gas delivery and ensuring that the operator understands the relationship between “wobble” parameters and thermal dissipation. The technology is no longer the bottleneck; the precision of the process setup is.

Report End.
Lead Engineer: Senior Welding Division
Location: Turin, Italy