Bending Arm Frame

Product Specifications

Technical details and manufacturing context for Bending Arm Frame

Definition

The Bending Arm Frame is the foundational structural element within a Bending Arm Assembly, serving as the main chassis that supports and aligns all other components. It provides the necessary rigidity to withstand bending forces while offering precise mounting locations for the bending mechanism, hydraulic/pneumatic systems, and control components. The frame acts as a stationary or semi-stationary structural foundation that absorbs and distributes the reaction forces generated during the bending operation. It maintains geometric stability while other components (like the bending arm, dies, and actuators) perform the actual metal forming work. Typical materials include structural steel and cast iron. Key parameters to verify for a specific application include rated load capacity (500–2000 kg), bending arm length (300–1200 mm), frame width (150–500 mm), frame height (200–600 mm), material grade (Q235–Q345 per GB/T 700), surface treatment (hot-dip galvanizing 20–40 μm per ISO 1461), mounting hole diameter (10–20 mm), mounting hole tolerance (±0.1 mm per ISO 2768-m), flatness tolerance (0.5–1.0 mm per ISO 2768-m), weight (50–300 kg), operating temperature (-20 to 80 °C), and surface hardness (150–250 HB per ISO 6506-1). These values are reference ranges; always confirm model-specific values with the legal manufacturer or supplier. The frame's design must ensure proper alignment and load distribution to prevent premature wear or failure. Regular inspection for cracks, deformation, or corrosion is recommended. If any parameter is outside the specified range, consult the manufacturer before use.

Working Principle

The frame acts as a stationary or semi-stationary structural foundation that absorbs and distributes the reaction forces generated during the bending operation. It maintains geometric stability while other components (like the bending arm, dies, and actuators) perform the actual metal forming work. The frame's rigidity and precise mounting points ensure that the bending forces are transmitted correctly, preventing misalignment and ensuring consistent bending quality. The frame also provides a reference for the positioning of other components, contributing to the overall accuracy of the assembly.

Common Materials

Structural steel, Cast iron

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Load Capacity	500–2000 kg	Maximum load the frame can support without permanent deformation
Bending Arm Length	300–1200 mm	Determines reach and bending capacity
Frame Width	150–500 mm	Affects mounting compatibility
Frame Height	200–600 mm	Affects mounting compatibility
Material Grade	Q235–Q345	Higher grade for higher strength requirementsGB/T 700
Surface Treatment	20–40 μm	Hot-dip galvanizing thickness for corrosion resistanceISO 1461
Mounting Hole Diameter	10–20 mm	Must match mating components
Mounting Hole Tolerance	±0.1 mm	Ensures proper fitISO 2768-m
Flatness Tolerance	0.5–1.0 mm	Critical for even load distributionISO 2768-m
Weight	50–300 kg	Affects handling and installation
Operating Temperature	-20–80 °C	Beyond this range material properties may degrade
Surface Hardness	150–250 HB	Resistance to wear and indentationISO 6506-1

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
Primary load-bearing surface that distributes forces to the foundation

Material: Structural steel
Vertical Supports Part
Provide height and vertical stability to the bending mechanism

Material: Structural steel
Cross Braces Part
Add torsional rigidity and prevent frame deformation under load

Material: Structural steel
Mounting Brackets Part
Provide attachment points for hydraulic cylinders, guides, and other components

Material: Steel plate

Application & selection

Application Fit & Sizing Matrix

Operational Limits

pressure:	Up to 10 MPa (static load)
other spec:	Max dynamic load: 5 kN, Vibration tolerance: 5-200 Hz at 0.5g max
temperature:	-40°C to 150°C

Media Compatibility

✓ Hydraulic fluid systems ✓ Industrial lubricants ✓ Dry inert gas environments

Unsuitable: High-concentration abrasive slurry (>15% solids by weight)

Sizing Data Required

Maximum bending moment (Nm)
Required mounting interface dimensions (mm)
Environmental exposure class (e.g., ISO 12944 C4)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Fatigue cracking

Cause: Cyclic loading from repeated bending operations leading to stress concentration at weld joints or geometric transitions

Bearing seizure

Cause: Inadequate lubrication or contamination ingress causing excessive friction and heat buildup in pivot points

Maintenance Indicators

Visible cracks or deformation at weld joints or high-stress areas
Unusual grinding or squealing noises during operation indicating bearing wear or misalignment

Engineering Tips

Implement regular non-destructive testing (ultrasonic or magnetic particle) to detect early-stage fatigue cracks before propagation
Establish a precision lubrication program with contamination control and proper regreasing intervals for all pivot bearings

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 2768-1: General tolerances for linear and angular dimensions ANSI B4.1: Preferred Limits and Fits for Cylindrical Parts DIN 6930: Cold bending of steel sections - Tolerances

Quoted from the published standard.

Manufacturing Precision

Bore diameter: +/-0.02mm
Frame flatness: 0.1mm per meter

Quality Inspection

Dye Penetrant Test for surface cracks
Coordinate Measuring Machine (CMM) verification of critical dimensions

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.

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Manufacturers of Bending Arm Frame

Manufacturer profiles associated with Bending Arm Frame.

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Frequently Asked Questions

What is the primary function of a Bending Arm Frame?

The primary function is to provide a rigid structural foundation that supports and aligns all other components of a bending arm assembly, ensuring accurate and stable bending operations.

What materials are commonly used for Bending Arm Frames?

Common materials include structural steel and cast iron, as listed in the product data. The specific material grade should be confirmed with the manufacturer for the intended application.

What are the typical load capacity ranges for Bending Arm Frames?

The rated load capacity typically ranges from 500 to 2000 kg, but this is a reference range. Always verify the exact capacity for the specific model with the manufacturer.

How should I verify the specifications of a Bending Arm Frame?

Check the product datasheet for parameters such as dimensions, tolerances, material grade, and surface treatment. Confirm that these values meet your application requirements and consult the manufacturer for any clarifications.

Related equipment

Applied To / Applications

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

Bending Arm Assembly

View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems

Downstream Applications

Specialized Tooling

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.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 13 October 2026

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