Bending Arm Assembly for Tube Bending Machines

Product Specifications

Technical details and manufacturing context for Bending Arm Assembly

Definition

The Bending Arm Assembly is a critical component of industrial tube bending machines. It consists of multiple integrated parts that work together to precisely position and apply bending force to metal tubes. As the primary force application mechanism, it transforms straight tubes into curved shapes according to specified angles and radii. The assembly receives hydraulic or mechanical force from the machine's power system, which is transmitted through linkages and pivots to the bending die or mandrel. As the arm rotates or moves along a predetermined path, it applies controlled pressure to the tube against a stationary clamp die, creating the desired bend while minimizing deformation and maintaining tube integrity. Typical materials include alloy steel and hardened tool steel. Key parameters include rated bending torque (500–2000 N·m), bending angle range (0–180°), bending speed (0.5–2.5 r/min), positioning accuracy (±0.05°), operating pressure (1.0–1.6 MPa), operating temperature (-10–60 °C), ingress protection (IP54–IP65, IEC 60529), material grade (42CrMo–40Cr, GB/T 3077), weight (150–350 kg), and mounting interface (ISO 9409-1-50-4-M6, ISO 9409-1). These values are reference ranges and must be verified for the specific model and application. The assembly is designed for integration into industrial tube bending machines, and its selection depends on tube size, material strength, and required bend accuracy. Maintenance signals include unusual noise, vibration, or reduced positioning accuracy. Failure boundaries include exceeding rated torque or operating outside temperature limits. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The assembly receives hydraulic or mechanical force from the machine's power system, which is transmitted through linkages and pivots to the bending die or mandrel. As the arm rotates or moves along a predetermined path, it applies controlled pressure to the tube against a stationary clamp die, creating the desired bend while minimizing deformation and maintaining tube integrity.

Common Materials

Alloy Steel, Hardened Tool Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Bending Torque	500–2000 N·m	Determines max tube size and material strength
Bending Angle Range	0–180 °	Full range for standard bends
Bending Speed	0.5–2.5 r/min	Affects cycle time and surface quality
Positioning Accuracy	±0.05 °	Critical for repeatable bend angles
Operating Temperature	-10–60 °C	Outside range may affect seals and lubricants
Ingress Protection	IP54–IP65	Protects against dust and water jetsIEC 60529
Material Grade	42CrMo–40Cr	High strength and wear resistanceGB/T 3077
Weight	150–350 kg	Affects machine stability and handling
Mounting Interface	ISO 9409-1-50-4-M6	Standard flange for robotic and machine integrationISO 9409-1

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

Bending Arm Frame
Main structural support that houses all other components and transfers bending forces

Material: Alloy Steel
Bending Die Holder
Secures and positions the bending die that contacts and shapes the tube

Material: Hardened Tool Steel
Pivot Bearing Assembly
Enables smooth rotational movement of the bending arm around the central axis

Material: Bearing Steel
Force Transmission Linkage
Connects the power source to the bending arm to transfer mechanical force

Material: Forged Steel
Bending Die
The profiled die the tube is wrapped around; it sets the bend radius.
Mandrel Optional
Supports the tube from inside during the bend to stop the wall collapsing, on mandrel-bending setups.

Applied To / Applications

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

Industrial Tube Bending Machine

View system integration details

Manufacturers of Bending Arm Assembly

Manufacturer profiles associated with Bending Arm Assembly.

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Frequently Asked Questions

What is the primary function of the Bending Arm Assembly?

It applies controlled force to bend metal tubes in industrial tube bending machines, transforming straight tubes into curved shapes according to specified angles and radii.

What materials are typically used for this assembly?

Alloy steel and hardened tool steel are listed as materials on file, providing high strength and wear resistance.

What are the key parameters to consider when selecting this assembly?

Key parameters include rated bending torque, bending angle range, bending speed, positioning accuracy, operating pressure, temperature range, ingress protection, material grade, weight, and mounting interface. These must be verified for the specific model.

How should I verify the suitability of this assembly for my application?

Check the manufacturer's specifications for the exact model, confirm that the rated torque, angle range, speed, and other parameters meet your requirements, and ensure compliance with relevant standards such as IEC 60529, and GB/T 3077.

Data Basis

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

Preliminary Technical Classification

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pressure:	Up to 300 bar hydraulic pressure
other spec:	Max bending force: 50 kN, Stroke length: 200-500 mm, Repeatability: ±0.1 mm
temperature:	-10°C to +60°C

Bending Arm Assembly

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards