Editorial Technical Reference

Robotic Arm

This page explains how Robotic Arm is classified within Fabricated Metal Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Multi-axis articulated manipulator for precise positioning and movement of welding tools

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Robotic Arm

Definition
The robotic arm is a programmable, multi-jointed mechanical component that serves as the primary motion system within a trailer frame welding robot. It enables precise positioning and orientation of welding torches or other end-effectors along complex three-dimensional paths required for trailer frame assembly. The arm typically features 4 to 6 axes, allowing for flexible movement and orientation in space. Constructed from materials such as aluminum alloy, steel, and composite materials, the arm balances strength and weight to support dynamic welding operations. Key parameters include a rated payload of 5–15 kg (at maximum reach, payload reduces to 60%), a maximum reach of 1.4–2.6 m measured from base to wrist flange, and repeatability of ±0.05–±0.1 mm, critical for consistent weld seams. The arm operates at speeds up to 2–4 m/s at the end effector, affecting cycle time. Power consumption ranges from 3–8 kW, including controller and servo drives, with a supply voltage of 380–480 V AC (3-phase, 50/60 Hz). It operates in temperatures from -10°C to 45°C; below 0°C, lubricants may thicken. Protection class ranges from IP54 to IP65, suitable for dusty or wet environments. The total weight, including base, arm, and controller, is 250–600 kg. These values are reference ranges and must be verified for the specific model and application. Standards such as ISO 9283 for performance and IEC 60529 for protection class are referenced for verification, but do not imply certification. Always confirm model-specific specifications and compliance with the legal manufacturer or supplier.
Working Principle
The robotic arm operates through coordinated servo motor control at each joint, typically 4 to 6 axes. It receives motion commands from the robot controller and uses feedback from encoders to achieve precise positioning. The controller executes programmed trajectories, guiding the end-effector along desired paths with high repeatability. This closed-loop control ensures accurate placement of welding tools, compensating for variations in load and speed. The arm's structure, made of aluminum alloy, steel, or composites, provides rigidity while minimizing inertia. The working principle enables complex three-dimensional movements required for trailer frame assembly, maintaining consistent weld quality.
Common Materials
Aluminum alloy, Steel, Composite materials
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Payload5–15 kgAt max reach, payload reduces to 60%.ISO 9283
Maximum Reach1.4–2.6 mMeasured from base to wrist flange.
Repeatability±0.05–±0.1 mmCritical for welding seam consistency.ISO 9283
Number of Axes66-axis for full spatial flexibility.
Maximum Speed2–4 m/sAt end effector, affects cycle time.
Power Consumption3–8 kWIncludes controller and servo drives.
Supply Voltage380–480 V AC3-phase, 50/60 Hz.IEC 60038
Operating Temperature-10–45 °CBelow 0°C, lubricants may thicken.
Protection ClassIP54–IP65IP65 for dusty or wet environments.IEC 60529
Weight250–600 kgIncludes base, arm, and controller.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Base Part
    Foundation mounting point and first axis rotation
    Material: Cast iron or steel
  • Upper Arm Part
    Primary extension member providing reach
    Material: Aluminum alloy
  • Forearm Part
    Secondary extension with wrist mounting
    Material: Aluminum alloy
  • Wrist Assembly
    Multi-axis orientation control for end-effector
    Material: Steel and aluminum
  • Servo Motors
    Provide precise rotational movement at each joint
    Material: Various (copper windings, steel housing)
  • Reduction Gears
    Increase torque and precision of joint movements
    Material: Hardened steel
  • Joint Encoders
    Report each joint angle back so the arm can hit the programmed position repeatably.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (atmospheric operation)
other spec: Payload capacity: 5-50 kg, Repeatability: ±0.05 mm, IP rating: IP54/IP67
temperature: -10°C to 50°C
Media Compatibility
✓ MIG welding torches ✓ TIG welding equipment ✓ Plasma cutting tools
Unsuitable: High-vibration environments (e.g., near forging hammers)
Sizing Data Required
  • Maximum payload weight (kg)
  • Required reach/working envelope (mm)
  • Required positioning accuracy/repeatability (mm)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Gearbox backlash and wear
Cause: Inadequate lubrication, contamination ingress, or cyclic loading leading to pitting and spalling of gear teeth, resulting in positional inaccuracy and vibration.
Encoder or resolver failure
Cause: Electrical noise, moisture ingress, mechanical shock, or thermal cycling damaging sensitive feedback components, causing loss of positional feedback and uncontrolled motion.
Maintenance Indicators
  • Unusual grinding, clicking, or whining noises from joints or gearboxes during movement
  • Visible oil leaks around seals or joints, or excessive play/wobble in arm linkages during operation
Engineering Tips
  • Implement condition-based lubrication using automated greasing systems with moisture-resistant, high-tack greases, and monitor grease purging for contamination.
  • Install vibration and thermal monitoring sensors on critical joints and gearboxes, using trend analysis to schedule maintenance before failure thresholds are reached.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 9283:1998 - Manipulating industrial robots - Performance criteria and related test methods ANSI/RIA R15.06 - Industrial Robots and Robot Systems - Safety Requirements CE Marking - Compliance with EU Machinery Directive 2006/42/EC

Quoted from the published standard.

Manufacturing Precision
  • Positioning repeatability: +/-0.02mm
  • Path accuracy: +/-0.1mm over full working envelope
Quality Inspection
  • Laser interferometer calibration for positioning accuracy
  • Load capacity and moment testing per ISO 9283

Manufacturers of Robotic Arm

12 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Romtronic International Co., Limited
Dongguan, Guangdong, CN
Founded 199710,000㎡
ISO 9001:2015 ISO 13485:2016 IATF 16949
Managed by the manufacturer
Listed on the company's own website
Jinan Blue Elephant CNC Machinery Co., Ltd.
Jinan, Shandong, CN
75,000 ㎡
ISO Certified
Listed on the company's own website · profile compiled by CNFX from public sources
Fortior Technology
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
HuazhongCNC
Hubei, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Purity Pump Co., Ltd.
Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Qingdao Jiujin Machinery Co., Ltd.
Shandong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Shanghai Michigan Machinery Co., Ltd.
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Swoer
Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
SYNTEC TECHNOLOGY CO., LTD.
Hsinchu, Taiwan, CN
Listed on the company's own website · profile compiled by CNFX from public sources
XTJ CNC
Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
ZCEBOX (Tangshan Zhengcheng Electric Co.,Ltd)
Tangshan, Hebei, CN
Listed on the company's own website · profile compiled by CNFX from public sources
ZONESUN
Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
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Manufacturing capability
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Inspection readiness
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Frequently Asked Questions

What is the rated payload of this robotic arm?

The rated payload is 5–15 kg, but at maximum reach, the payload reduces to 60% of the rated value. This is a reference range; confirm the exact payload for your specific model and application with the manufacturer.

What is the repeatability of the robotic arm?

The repeatability is ±0.05 to ±0.1 mm, which is critical for consistent welding seam quality. This value is per ISO 9283 and should be verified for the actual unit.

What are the power requirements?

The power consumption is 3–8 kW, including the controller and servo drives. The supply voltage is 380–480 V AC, 3-phase, 50/60 Hz. Always check the nameplate and confirm with the supplier.

What is the operating temperature range?

The operating temperature range is -10°C to 45°C. Below 0°C, lubricants may thicken, affecting performance. Ensure the environment is within this range or consult the manufacturer for cold-weather options.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.
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