SZGH H2100-B-6 Six-Axis Heavy Welding Robot

What Is the SZGH H2100-B-6?

The SZGH H2100-B-6 is a six-axis heavy industrial welding robot with a 2,100 mm reach, ±0.05 mm repeatability, and a purpose-built extended heavy-duty base optimized for large box-structure welding. Designed for engineering machinery, mining equipment, locomotive fabrication, and any application involving workpieces too large for standard-reach robots, it combines fully enclosed axis spatter protection with the mass and stability required to maintain arc quality on multi-face, multi-pass structural welds.

Full Technical Specifications

Axis Motion Range

Axis Maximum Speed

Supported Welding Processes

Core Advantages

2,100 mm Reach — Covers Full Six-Face Welding on Large Structural Parts

The H2100-B-6 extends 600 mm further than the H1500-B-6, bringing the entire weld envelope of large structural parts — excavator arms, box columns, mining equipment frames, locomotive chassis sections — within reach from a single mounting position. When paired with a dual-axis positioner, this combination enables complete six-face weld coverage on box structures up to ~1,800 mm in longest dimension without any manual repositioning or operator entry into the weld zone.

Extended Heavy-Duty Base — Anti-Vibration Stability for Heavy Box Structure Welding

The H2100-B-6 base is specifically engineered for heavy structural welding. At 235 kg robot body weight, the base mass is 57% heavier than the H1500-B-6 (150 kg). This added mass, combined with a wider base footprint, dramatically dampens the vibration induced by multi-pass high-current arc welding on thick plate. The result is a stable, controlled weld bead even on long single-pass fillet welds on structural members — a condition where lighter robots exhibit torch path deviation under arc reaction forces.

Fully Enclosed Axis Structure — Spatter-Proof in the Harshest Fabrication Environments

Heavy structural welding generates substantially more spatter than light-gauge sheet metal welding — thicker plate, higher current, longer arc times. Every joint axis on the H2100-B-6 is fully sealed, preventing spatter ingress to internal cables and encoders. This protection is especially critical in box-structure environments where the robot must reach into confined internal corners, exposing joints to concentrated spatter from multiple surfaces.

±0.05 mm Repeatability — Structural Weld Quality on Every Pass

Heavy structural weldments often require multi-pass welds and precise pass sequencing to manage heat input and avoid distortion. The H2100-B-6's ±0.05 mm repeatability ensures that each successive pass starts and tracks exactly where programmed — critical for fillet welds on box structures where pass-placement error accumulates into dimensional distortion of the finished assembly.

Dual-Axis Positioner Integration — Eliminate Overhead and Positional Welding

The H2100-B-6 is the standard SZGH recommendation for dual-axis positioner pairings. The positioner rotates and tilts the workpiece so that all weld joints are presented to the robot in the flat or horizontal position — eliminating overhead (4G) and vertical (3G) welding positions that generate higher defect rates and require slower travel speeds. For box-structure fabrication, this translates directly to reduced rework and higher throughput per shift.

Application Scenarios

H-Series Internal Comparison — Which Model Is Right for You?

Selection guide:

• Workpiece longest dimension ≤ 1,200 mm → H1500-B-6

• Workpiece longest dimension 1,200–1,800 mm, box structure → H2100-B-6

• Six-face box structure welding, excavator arms, mining frames → H2100-B-6 + dual-axis positioner

• Prefer the latest motion platform at ~2,000 mm reach → HZ2000-B-6

Customer Case Study

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

A Turkish manufacturer of engineering machinery components approached us with a challenge that is common in the sector but rarely solved well: their main product, excavator bucket arms (斗杆), is a box-section weldment approximately 1,800 mm long with weld seams on all six faces. The top-face seams — the overhead joints — had always been the problem. Welders had to physically climb onto the workpiece or use elevated platforms to access the top face, creating both a safety liability and a quality issue. The overhead welding position is the hardest to execute consistently, and their top-face weld rework rate had reached 14%, meaning roughly one in seven pieces required grinding and re-welding on that face alone.

We specified the H2100-B-6 paired with a dual-axis positioner. The 2,100 mm reach gives the robot access to all six faces of the bucket arm from a fixed floor-mount position. The dual-axis positioner handles all workpiece rotation and tilt — so what would have been an overhead weld is rotated by the positioner into a flat downhand position before the robot arcs. The robot never welds out-of-position. Flat welding is the most stable arc condition, achievable at higher travel speeds and with lower spatter generation.

The results after the first production quarter were clear: rework rate on the top face dropped from 14% to 1.8%. Single-piece welding cycle time compressed from approximately 52 minutes to 28 minutes — a reduction attributable both to eliminating operator repositioning time and to the ability to run higher travel speeds in the flat position. No operators enter the weld zone during the automated cycle, removing the safety exposure entirely.

The 235 kg robot body weight was also a factor the customer came to appreciate. They had trialed a lighter competitor robot on a similar application and found the torch path drifted on long single-pass fillet welds under high-current conditions. The H2100-B-6's base mass absorbs those arc reaction forces without deflection.

Control System & Welding Process Configuration

SZGH Welding Controller

The H2100-B-6 ships with SZGH's dedicated welding robot controller, which includes:

• Welding process package: Pre-configured weld schedules for MIG, TIG, MAG, plasma arc, and spot welding

• Multi-pass weld programming: Layered weld sequence management for heavy-plate multi-pass fillet and butt welds

• Arc tracking: Real-time seam tracking compensating for thermal distortion on long structural welds

• Wire feed control: Integrated wire-feed speed synchronization with robot travel speed across full 2,100 mm reach

Dual-Axis Positioner Integration

The H2100-B-6 is designed as the primary robot in a dual-axis positioner cell for box-structure fabrication:

• The positioner's two axes (rotation + tilt) appear as external robot axes in the teach pendant

• Synchronized motion allows continuous-seam welding around corners without arc interruption

• The controller's position management ensures all welds are executed in the flat/horizontal position regardless of workpiece orientation

• Safe-zone interlocking prevents robot motion into positioner travel range during tilt transitions

Compatible Welding Power Sources

The H-series welding process package supports I/O and communication integration with major welding power source brands including Fronius, Lincoln Electric, Miller, ESAB, OTC Daihen, and Panasonic, as well as domestic Chinese brands. Specific protocol support available on request — contact export02@szghtech.com.

Certifications & Warranty

Frequently Asked Questions

Q1: What is the largest workpiece the H2100-B-6 can weld in a full dual-axis positioner cell?

With the 2,100 mm reach and a dual-axis positioner, the H2100-B-6 can cover all six faces of a box-structure workpiece up to approximately 1,800 mm in longest dimension and 800 × 800 mm in cross-section, without any manual repositioning. Exact coverage depends on positioner clamping geometry — SZGH's applications team provides cell layout analysis as part of the quotation process.

Q2: Why is the H2100-B-6 heavier than the H1500-B-6, and does that matter for welding quality?

The H2100-B-6 weighs approximately 235 kg versus the H1500-B-6's 150 kg. The additional mass is in the extended heavy-duty base, which is specifically designed to resist vibration from high-current arc welding on thick structural plate. Heavier robot base mass reduces torch path deviation under arc reaction forces — a measurable quality difference on long single-pass fillet welds at high amperage.

Q3: How does the H2100-B-6 eliminate overhead welding in box-structure applications?

The dual-axis positioner tilts and rotates the workpiece so that every weld joint is presented to the robot in the flat (1G/1F) or horizontal (2F) position before the arc is struck. The robot never executes overhead (4G) or vertical (3G) welds. Flat welding produces lower porosity, higher travel speeds, and more consistent bead profile than out-of-position welding.

Q4: What is the difference between the H2100-B-6 and the HZ2000-B-6?

The HZ2000-B-6 is the next-generation large-reach welding platform at approximately 2,000 mm reach, featuring an enhanced motion platform with improved joint performance. The H2100-B-6 offers 100 mm more reach and the proven extended heavy-duty base design. Customers specifying new production cells should contact SZGH for a current-generation comparison and application suitability review.

Q5: Can the H2100-B-6 be used for plasma arc welding on thick structural plate?

Yes. The controller's welding process package includes plasma arc welding configuration. Plasma arc is used on the H2100-B-6 for applications requiring deeper penetration on thick plate (>12 mm) or precision cutting of structural members within a combined weld-and-cut cell. Torch selection and gas configuration for plasma arc are provided as part of application engineering support.

Q6: What rework rate improvement can be expected when replacing manual overhead welding with H2100-B-6 automation?

Field results vary by application, but the mechanism is consistent: the positioner eliminates out-of-position welding, converting all joints to flat or horizontal position — the easiest arc conditions for consistent quality. In the bucket arm application described in our customer case above, rework on overhead joints dropped from 14% to 1.8%. Customers with high overhead-weld rework rates in structural fabrication typically see the most significant quality improvements.

Q7: Is the H2100-B-6 suitable for stainless steel structural welding, or only carbon steel?

The H2100-B-6 supports MIG, TIG, and MAG processes, all of which are used for stainless steel structural welding. TIG is the recommended process for visible stainless steel joints requiring minimal heat input and no post-weld cleanup. The enclosed axis structure also protects joints from the chromium-oxide fumes generated during stainless steel welding, which are particularly corrosive to unprotected cable insulation.

Q8: What is the installation footprint and power requirement for an H2100-B-6 + dual-axis positioner cell?

A standard H2100-B-6 cell with one dual-axis positioner occupies approximately 4 × 4 m of floor space (cell perimeter including safety fencing). The robot controller requires a 3-phase 380V / 50 Hz supply. Welding power source power requirements depend on the selected unit and process. SZGH provides full cell layout drawings and electrical specifications as part of the order confirmation package.

Request a Quote

The H2100-B-6 is the standard SZGH recommendation for heavy structural welding — engineering machinery, mining equipment, locomotive fabrication, and box-structure assemblies. Contact SZGH to discuss your specific workpiece dimensions, production volume, and process requirements.

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Related Products

• SZGH H1500-B-6 — 1500mm standard welding robot, lighter base for mid-size parts

• SZGH HZ2000-B-6 — Next-generation 2000mm welding robot, enhanced motion platform

• SZGH HZ1500-B-6 — Next-generation 1500mm welding robot

• SZGH Dual-Axis Positioner — Dual-axis positioner for six-face box structure welding