Positioning Fixture for Trailer Frame Welding Robots

Product Specifications

Technical details and manufacturing context for Positioning Fixture

Definition

The Positioning Fixture is a component used in motor vehicle manufacturing, specifically within the Trailer Frame Welding Robot system. Its primary function is to securely clamp and accurately position trailer frame structural elements—such as beams, crossmembers, and brackets—in the correct spatial orientation and alignment. This ensures precise, consistent, and high-quality robotic welding by eliminating manual positioning errors and enabling automated, repeatable processes. The fixture operates using mechanical clamps, often hydraulic or pneumatic, which are activated by the robot control system. It incorporates precisely machined locating pins, stops, and surfaces that reference the components against a fixed datum, holding all parts in their exact designated welding positions before and during the welding cycle. Key parameters include a clamping force of 5–20 kN, positioning accuracy of ±0.05 mm (ISO 230-2), repeatability of ±0.02 mm (ISO 230-2), operating pressure of 1.0–1.6 MPa, operating temperature of -10 to 60 °C, ingress protection of IP54–IP65 (IEC 60529), and a clamping stroke of 25–50 mm. The fixture is typically made of carbon steel or alloy steel, with material grade S355JR (EN 10025) and zinc-plated surface treatment (ISO 2081). Weight ranges from 150–350 kg, footprint from 1200×800 to 2000×1200 mm, and cycle time from 30–60 seconds. These values are directory reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. The fixture is designed for high-volume production, ensuring consistent weld seam placement and accommodating different frame cross-sections. It is essential to confirm all specifications and standards with the manufacturer before procurement or use.

Working Principle

The fixture uses mechanical clamps (often hydraulic or pneumatic) activated by the robot control system to grip the workpiece. It incorporates precisely machined locating pins, stops, and surfaces that reference the trailer frame components against a fixed datum, ensuring all parts are held in their exact designated welding positions before and during the welding cycle. This eliminates manual positioning errors and enables automated, repeatable welding processes.

Common Materials

Carbon Steel, Alloy Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Clamping Force	5–20 kN	Required to hold frame components during robotic welding without deformation.
Positioning Accuracy	±0.05 mm	Ensures consistent weld seam placement.ISO 230-2
Repeatability	±0.02 mm	Critical for high-volume production.ISO 230-2
Operating Temperature	-10–60 °C	Outside this range, seals may fail.
Ingress Protection	IP54–IP65	Protects against dust and water splashes in welding environment.IEC 60529
Material	S355JR	High-strength steel for durability and weldability.EN 10025
Surface Treatment	Zinc-plated	Corrosion resistance in industrial environment.ISO 2081
Weight	150–350 kg	Depends on fixture size and configuration.
Footprint	1200×800–2000×1200 mm	Varies with workpiece dimensions.
Clamping Stroke	25–50 mm	Accommodates different frame cross-sections.
Cycle Time	30–60 s	Includes clamping, positioning, and release.

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 Plate Part
Provides a rigid, flat foundation for mounting all other fixture components and locating the entire assembly within the robot cell.

Material: steel
Locating Pin Part
Precisely positions the workpiece by engaging with pre-drilled holes in the trailer frame components, defining primary location.

Material: hardened steel
Clamp Arm Part
Movable arm that applies force to hold the workpiece firmly against the locating surfaces and pins.

Material: steel
Support Block Part
Provides additional vertical support to the workpiece to prevent sagging or vibration during welding.

Material: steel
Locating Stops
Fix the workpiece against a datum in the directions the pins do not constrain.

Manufacturers of Positioning Fixture

Manufacturer profiles associated with Positioning Fixture.

Sourcing Positioning Fixture from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the primary function of the positioning fixture?

The positioning fixture securely clamps and accurately positions trailer frame components during robotic welding, ensuring precise alignment and consistent weld quality.

What are the typical clamping force and positioning accuracy?

The clamping force ranges from 5 to 20 kN, and positioning accuracy is ±0.05 mm per ISO 230-2. These are reference values; confirm with the manufacturer for your specific model.

Which standards are referenced for the fixture's parameters?

Standards include ISO 230-2 for accuracy and repeatability, IEC 60529 for ingress protection, EN 10025 for material, and ISO 2081 for surface treatment. These are verification references, not certifications.

How should I verify the fixture's suitability for my application?

Consult the legal manufacturer or supplier to confirm that the clamping force, stroke, footprint, and other parameters match your workpiece dimensions and welding requirements. Always verify standards compliance for your specific use case.

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.

Buyer enquiry

Request manufacturing insight for Positioning Fixture

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	Max clamping force: 5000 N, Max hydraulic pressure: 200 bar
other spec:	Positioning accuracy: ±0.1 mm, Repeatability: ±0.05 mm, Vibration tolerance: ≤5 g RMS
temperature:	0°C to 50°C (operating), -20°C to 70°C (storage)

Positioning Fixture

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards