INDUSTRY COMPONENT

Clamping Arm

A clamping arm is a mechanical component in welding fixtures that securely holds workpieces in precise positions during welding operations.

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Component Specifications

Definition
A clamping arm is a critical component of welding fixtures and jigs, designed to apply controlled force to hold workpieces firmly against locators or other reference surfaces. It ensures dimensional accuracy and repeatability during welding processes by preventing movement from thermal expansion, vibration, or external forces. Typically featuring adjustable mechanisms, it accommodates various workpiece geometries while maintaining consistent clamping pressure.
Working Principle
The clamping arm operates on mechanical leverage principles, often using pneumatic, hydraulic, or manual actuation. When activated, it pivots or translates to contact the workpiece, applying force through a pad or contact point. This force creates friction and mechanical restraint, locking the workpiece in position against fixture locators. Release mechanisms disengage the arm for loading/unloading.
Materials
High-strength alloy steel (e.g., AISI 4140), hardened to 45-50 HRC for wear resistance; corrosion-resistant coatings (zinc plating or powder coating) optional; pivot pins from case-hardened steel; contact pads from aluminum or urethane to prevent workpiece damage.
Technical Parameters
  • Stroke Length 50-200 mm
  • Clamping Force 500-5000 N (adjustable)
  • Rotation Angle 90-180 degrees
  • Weight Capacity Up to 50 kg per arm
  • Mounting Pattern Standardized hole spacing (e.g., 32 mm grid)
  • Operating Pressure 0.4-0.8 MPa (pneumatic models)
Standards
ISO 12100, DIN 6325, ISO 10209

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Clamping Arm.

clamping arm welding fixture jig component workpiece clamping automotive welding fixture design industrial clamping metal fabrication Clamping Arm in Motor Vehicle Manufacturing

Parent Products

This component is used in the following industrial products

Welding Fixture / Jig

A specialized tooling device used to hold and position metal components during welding operations to ensure dimensional accuracy and repeatability.

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Case Positioning Fixture

A specialized fixture designed to precisely hold and position a case or housing during assembly operations.

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Clamping Units

Mechanical components within modular tooling fixtures that apply controlled force to secure workpieces during machining, assembly, or testing operations.

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Engineering Analysis

Risks & Mitigation
  • Over-tightening causing workpiece deformation
  • Wear at pivot points leading to misalignment
  • Inadequate force resulting in weld shift
FMEA Triads
Trigger: Worn pivot bushings
Failure: Reduced clamping accuracy and arm wobble
Mitigation: Implement preventive maintenance with lubrication and bushing replacement every 6 months
Trigger: Incorrect pressure settings
Failure: Workpiece slippage during welding
Mitigation: Use calibrated pressure regulators and routine force verification checks

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Positional tolerance ±0.1 mm under load
Test Method
ISO 230-1 for repeatability testing; force verification via load cell measurement

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

How do I select the right clamping arm for my welding fixture?

Consider workpiece weight, required clamping force, accessibility, and actuation type (pneumatic for speed, manual for simplicity). Ensure compatibility with your fixture's mounting system and verify stroke/rotation meets clearance needs.

Can clamping arms be used with different workpiece materials?

Yes, but adjust contact pad material: use urethane for delicate surfaces like aluminum, and steel pads for heavy-duty steel workpieces. Always verify force settings to prevent deformation.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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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