SZGH-1820-A Collaborative Laser Welding Robot — Light Series (Large Reach)

What Is the SZGH-1820-A?

The SZGH-1820-A is a 6-axis collaborative laser welding robot and the flagship model in SZGH's Light Series, combining a 20 kg payload with a 2,027 mm armspan and an industry-leading 4,000 mm/s tool speed. Engineered for large-envelope, high-throughput laser welding without a safety fence, the SZGH-1820-A carries even the heaviest industrial fiber laser welding heads and wobble-beam units while delivering spatter-free, precision seams on automotive body panels, large medical device housings, consumer electronics frames, and complex stainless steel assemblies. Its 4,000 mm/s travel speed makes it the fastest collaborative laser welding robot in the SZGH portfolio — and one of the fastest in its class globally.

Full Technical Specifications

5 Core Advantages of the SZGH-1820-A

Full-Body IP65 Protection — Entire Arm, Every Joint

Every surface of the SZGH-1820-A — base, links, all six joints, and tool flange — carries IP65 certification. In large-envelope laser welding environments where the robot sweeps across wide workpieces near coolant systems, fume extraction airflow, and metallic dust generated by adjacent machining operations, full-body IP65 ensures consistent reliability over multi-shift production schedules. This is not partial joint sealing; it is a whole-robot enclosure standard that reduces cleaning downtime and seal replacement costs.

6-Button Drag-and-Teach — Large-Part Programming Without Coding

Even across the 2,027 mm working envelope, the SZGH-1820-A's hand-guide teaching system remains fast and intuitive. Operators physically move the arm to each weld waypoint along an automotive door panel or large stainless steel enclosure and confirm with the 6-button interface — no teach pendant scripting, no coordinate entry. For manufacturers working with frequent design iterations on auto panels or large electronics enclosures, this means path updates in minutes rather than hours of offline reprogramming.

4,000 mm/s Tool Speed — Fastest Collaborative Laser Welder in the Light Series

At 4,000 mm/s maximum tool speed, the SZGH-1820-A sets the performance ceiling for the SZGH collaborative laser welding range. This speed is matched to high-power continuous-wave fiber lasers (2,000–6,000W class) commonly used for automotive body panel welding, where the heat input window is narrow and the robot must travel fast enough to prevent burn-through on body panels as thin as 0.7 mm. The combination of 20 kg payload and 4,000 mm/s speed means no compromise between carrying heavy laser heads and maintaining throughput.

XI Black Box — Process Traceability for Regulated Manufacturing

The XI Black Box fault recorder captures the complete operational state — axis positions, joint torques, speeds, EtherCAT bus data — at the exact moment of any anomaly. In automotive Tier 1 manufacturing (IATF 16949:2016 compliance required) and in medical device production under ISO 13485, process traceability is a regulatory necessity, not a preference. The XI Black Box provides auditable event logs that satisfy both automotive and medical quality system requirements without additional third-party monitoring hardware.

100 Safety Self-Checks + 10-Level Collision Protection — No Fence, Full Shop Floor Access

The SZGH-1820-A's 100-point pre-cycle safety verification and 10-level adjustable collision sensitivity allow it to operate without a safety fence in mixed human-robot work areas. This is especially relevant for large-envelope applications: a 2,027 mm reach cobot without collaborative safety certification would mandate a substantial safety perimeter, consuming significant floor space. The SZGH-1820-A's SEMI S2 and NRTL certifications satisfy risk assessment requirements for semiconductor, automotive, and medical manufacturing environments.

Application Scenarios

Full Model Comparison — SZGH Collaborative Welding Robot Series

Selection Guide: The SZGH-1820-A is the right choice when your laser welding application demands a long reach (over 1,500 mm), a heavy laser head (over 10 kg including cooling and optics), or high-speed traversal across large workpieces such as automotive panels or server chassis. For smaller-format precision work where ±0.03 mm accuracy matters more than reach, consider the SZGH-1415-L. For arc welding (MIG/MAG/TIG) with similar dimensions, the SZGH-1820-A is the counterpart.

Customer Case Study — Australia

"Our automotive Tier 1 customer required zero visible spatter on Class A panel welds. Manual TIG couldn't meet the standard. The SZGH-1820-L solved it on the first trial run."

Our facility in Melbourne produces pressed steel and aluminum subassemblies for a Japanese automotive OEM's Australian assembly operation. The specific challenge was a door inner reinforcement bracket with a 1,800 mm continuous seam across three separate flanges — a geometry that requires both long reach and precise path control. Manual TIG left burn marks and required full-length post-weld grinding on every piece, consuming 22 minutes per unit and still failing the OEM's Class A cosmetic standard roughly 6% of the time.

We evaluated three collaborative laser welding platforms in 2025. The SZGH-1820-A was the only unit with sufficient reach (2,027 mm working envelope covered the full bracket geometry without repositioning), enough payload for our 14 kg wobble-beam laser head, and the EtherCAT synchronization needed to coordinate with our rotary positioner. The XI Black Box feature was a specific requirement from our quality team — we needed process data logs for the OEM's supplier audit trail.

Integration took eight weeks including positioner synchronization setup and weld parameter qualification. Today the seam is laser-welded in 6.8 minutes per bracket with zero spatter, zero post-weld grinding, and a cosmetic rejection rate of 0.4%. Our payback period based on labor savings alone is projected at 16 months.

By Fannie Chen, CEO, Shenzhen Guanhong Automation Co., Ltd. (SZGH) | May 2026

Control System & Integration

EtherCAT High-Speed Bus at 1 kHz

The SZGH-1820-A runs on a 1 kHz EtherCAT real-time control bus, maintaining deterministic sub-millisecond synchronization between robot motion and laser source power modulation. At 4,000 mm/s travel speed across a 2,027 mm envelope, timing precision is critical — even 2 ms of jitter in the laser trigger signal produces visible inconsistency in penetration depth on thin automotive panels. EtherCAT's cycle time eliminates this risk.

Compatible Laser Types and Head Configurations

The 20 kg payload is engineered for the full spectrum of industrial fiber laser welding configurations:

• High-Power CW Fiber Laser (2,000–6,000W): IPG YLS, Raycus RFL, MAX series — automotive body panel and EV battery pack applications

• Wobble / Oscillating Beam Heads: Scanners with integrated water cooling blocks weighing 10–16 kg, including gap-bridging capability for auto panel tolerance variation

• Remote Laser Welding (Galvo Scanner): Galvo scanner heads for high-speed multi-spot welding on battery tabs and electronics assemblies

• Pulsed Fiber Laser (200–1,500W): Low-heat precision welding for aerospace titanium, medical grade alloys, and thin copper

Vision & Seam Tracking Integration

Native 2D and 3D vision integration via the EtherCAT tool port and RS485 channel supports:

• Structured-light 3D seam tracking for automotive panel weld lines with cumulative forming tolerances

• Line laser profilometers for real-time seam position correction

• Post-weld bead inspection cameras for inline quality verification without operator involvement

15-Axis Synergy

The SZGH-1820-A supports synchronized operation with up to 14 additional external axes via SZGH's multi-axis controller. Typical large-envelope laser welding cells pair the robot with a 2-axis rotary-tilt positioner, a 1-axis linear track (extending effective reach beyond 2,027 mm), and fume extraction actuation — all interpolated in real time. This 15-axis capability is particularly relevant for automotive body-in-white cells and large EV battery module lines where continuous-seam welding on complex 3D geometry demands full-path coordination.

Offline Programming Support

Full compatibility with robot simulation and offline programming packages. Import body panel or enclosure CAD data, auto-generate laser weld paths, run collision simulation within the 2,027 mm envelope, and upload directly — bypassing teach-pendant time for high-complexity multi-seam components. IATF 16949:2016 process documentation exports are supported for automotive supplier documentation requirements.

Certifications & Warranty

Warranty: 18 months from date of shipment, covering all mechanical and electrical components under normal operating conditions. SZGH maintains a global service network with regional support partners across East Asia, Southeast Asia, Australia/Pacific, Europe, the Americas, and the Middle East. Spare parts inventory is guaranteed for a minimum of 7 years from production date — critical for automotive Tier 1 suppliers requiring long-term production continuity.

Frequently Asked Questions

Q1: Does the SZGH-1820-A require a safety fence given its large reach envelope?

No. Despite its 2,027 mm reach, the SZGH-1820-A maintains full collaborative robot certification with 10-level collision detection, 100 pre-cycle safety self-checks, and NRTL/CE/SEMI S2 certifications. It is designed for fence-free operation alongside human workers, subject to a site-specific risk assessment per ISO/TS 15066. For automotive and semiconductor customers, SZGH's application engineers provide full risk assessment documentation support.

Q3: Can the SZGH-1820-A carry heavy wobble-beam fiber laser heads?

Yes. The 20 kg payload is specifically rated to accommodate the heaviest production-grade wobble-beam welding heads, including models with integrated water cooling blocks and optical assemblies reaching 14–16 kg. The remaining payload margin covers cable management harnesses, seam tracking sensors, cross-jet nozzles, and any secondary tooling required in automotive or EV production setups.

Q4: What materials is the SZGH-1820-A suitable for?

The SZGH-1820-L handles the full range of fiber laser weldable materials at production scale: hot-stamped and cold-rolled steel (0.5–6 mm), aluminum alloys (0.5–4 mm), stainless steel (0.3–5 mm), titanium alloys (0.3–3 mm), nickel alloys, copper alloys, and dissimilar material combinations such as steel-to-aluminum (with appropriate laser parameters). For materials thicker than 6 mm requiring arc welding processes, the SZGH-1820-A is the appropriate alternative.

Q5: What does IP65 cover specifically on the SZGH-1820-A?

IP65 certification covers the complete robot body — all six joints, the upper arm, forearm, wrist, base, and tool flange interface. IP6X provides total dust ingress protection (no dust entry under any conditions); IPX5 provides protection against sustained low-pressure water jets from any direction. The SZGH-1820-L's IP65 is a whole-body rating verified through standardized testing, not a claim based on individual joint gaskets alone.

Q6: How does the SZGH-1820-A perform on automotive Class A panel surfaces?

The laser welding process inherently produces no spatter — eliminating the spatter pitting that is the primary cause of Class A surface rejection in arc welding. The low and controllable heat input of a fiber laser also minimizes panel distortion on thin body panels (0.7–1.5 mm), which is the second major rejection driver. Combined with the 4,000 mm/s travel speed and EtherCAT synchronization with the laser source, the 1820-L achieves consistent penetration profiles that meet Tier 1 automotive cosmetic and structural weld standards.

Q7: What is the XI Black Box and why does it matter for automotive suppliers?

The XI Black Box is SZGH's proprietary fault site data recorder, capturing robot state data (joint positions, torques, speeds, EtherCAT bus packets) at the exact moment of any fault, collision, or process stop. For automotive Tier 1 suppliers operating under IATF 16949:2016, process traceability records are mandatory for supplier audits. The XI Black Box provides auditable event logs for every anomalous event without requiring additional third-party data logging hardware, satisfying documentation requirements directly within the robot's control architecture.

Q8: What ROI can automotive or EV manufacturers expect from the SZGH-1820-A?

Automotive and EV manufacturers typically see payback periods of 14–22 months, driven by three primary savings: elimination of post-weld grinding labor (which can represent 20–40% of total cycle time on structural panel welds), reduction in cosmetic and structural rejection rates (commonly from 4–8% with arc or manual TIG to under 0.5% with laser), and reduction in consumable costs (no welding wire, no contact tips, no shielding gas volumes comparable to MIG/MAG). Exact payback depends on shift pattern, panel complexity, and local labor costs.

Request a Quote or Technical Consultation

The SZGH-1820-A is available for process qualification trials at SZGH's application center in Shenzhen. Submit your part drawings and material specifications, and our engineering team will provide a free weld qualification assessment including estimated cycle time and projected ROI.

Related Products

Explore the complete SZGH collaborative welding robot range:

• SZGH-1415-L — Light Series Laser Welding Cobot, 15 kg / 1464 mm: The compact-reach counterpart to the 1820-L. Higher ±0.03 mm accuracy for precision electronics and medical device applications.

• SZGH-1820-A — Master Series Arc Welding Cobot, 20 kg / 2027 mm: Same reach envelope as the 1820-L, built for MIG/MAG/TIG arc welding on structural steel and heavy-plate fabrication.

• SZGH-HZ2000-B-6 — Traditional 6-Axis Laser Welding Robot, 2000 mm: High-speed industrial (non-collaborative) large-reach laser welding robot for enclosed cells requiring maximum throughput without collaborative mode.

• SZGH-HZ1500-B-6 — Traditional 6-Axis Laser Welding Robot, 1500 mm: Mid-reach industrial laser welding robot for fully automated cells where collaborative operation is not required.