---
title: "Bending Arm Assembly"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:BENDING_ARM_ASSEMBLY"
  data_integrity_hash: "30cf4ac82e207d35b9415e0fa3299806"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:BENDING_ARM_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/bending-arm-assembly.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/bending-arm-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "15-75 kN bending force, 0.1-2.0 mm/s bending speed, 0.05-0.15 mm positioning accuracy"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 85
    unit: "kN"
    consequence: "Plastic deformation occurs when applied bending moment exceeds material's yield strength (σ_y = 450 MPa for hardened steel), causing permanent geometric distortion and loss of dimensional accuracy"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hydraulic fluid contamination exceeding ISO 4406 18/16/13 cleanliness level"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install dual 3-micron absolute filtration with differential pressure monitoring and automatic bypass"
  - node_2:
      trigger: "Bending die wear exceeding 0.3 mm radial clearance from nominal dimensions"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement laser-based in-process measurement with automatic die replacement at 0.25 mm wear threshold"
bom_nodes:
  bending-arm-frame:
    type: "part"
    urn: "URN:CNFX:ME:BENDING_ARM_FRAME"
    interface_type: "physical-logic-coupled"
  bending-die-holder:
    type: "part"
    urn: "URN:CNFX:ME:BENDING_DIE_HOLDER"
    interface_type: "physical-logic-coupled"
  pivot-bearing-assembly:
    type: "part"
    urn: "URN:CNFX:ME:PIVOT_BEARING_ASSEMBLY"
    interface_type: "physical-logic-coupled"
  force-transmission-linkage:
    type: "part"
    urn: "URN:CNFX:ME:FORCE_TRANSMISSION_LINKAGE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/bending-arm-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "d2e07eda4a87db6a8e1b5fe81bd78b49565924875024d59a3b7bca42e3842faa"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Bending Arm Assembly

## 1. Technical Definition
The mechanical assembly responsible for applying controlled force to bend tubes in industrial tube bending machines.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **15-75 kN bending force, 0.1-2.0 mm/s bending speed, 0.05-0.15 mm positioning accuracy**. Failure boundary: **Material yield strength exceeded at 85 kN bending force, hydraulic pressure exceeds 210 bar, angular deflection exceeds 0.25 radians**, Mechanism: **Plastic deformation occurs when applied bending moment exceeds material's yield strength (σ_y = 450 MPa for hardened steel), causing permanent geometric distortion and loss of dimensional accuracy**.

### 2.1 Analytical Physics Model
Governed by the **Frame Structural Deflection Analysis**:

> **Primary Equation**: $\delta = \frac{5 q L^4}{384 E I}$  
> **Engineering Impact**: Ensures structural stability for multi-stage machines.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| q | Uniform Load | Engineering Constant |
| E | Elastic Modulus | Engineering Constant |
| I | Moment of Inertia | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Hydraulic fluid contamination exceeding ISO 4406 18/16/13 cleanliness level | 8 | Servo valve spool sticking causing uncontrolled force application | Install dual 3-micron absolute filtration with differential pressure monitoring and automatic bypass |
| Bending die wear exceeding 0.3 mm radial clearance from nominal dimensions | 8 | Tube wall thinning and ovality defects exceeding 12% of nominal diameter | Implement laser-based in-process measurement with automatic die replacement at 0.25 mm wear threshold |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Bending Arm Frame](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/bending-arm-frame.md) `(Standalone System)`
- [Bending Die Holder](https://cnfx.com/llms/industry/fabricated-metal-product-manufacturing/product/bending-die-holder.md) `(Standalone System)`
- [Pivot Bearing Assembly](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/pivot-bearing-assembly.md) `(Standalone System)`
- [Force Transmission Linkage](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/force-transmission-linkage.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Tube Straightening Machine**, **Tube End Finishing Machine**, **CNC Tube Cutting Machine**  
**Downstream Applications**: Automotive Exhaust Systems, Aerospace Hydraulic Lines, Furniture Tubular Frames  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are used in this bending arm assembly?
**A**: This bending arm assembly is constructed from high-strength alloy steel and hardened tool steel components to withstand repeated bending forces and ensure long-term durability in industrial applications.

### Q: What is the function of the force transmission linkage?
**A**: The force transmission linkage efficiently transfers hydraulic or mechanical power from the machine's drive system to the bending die, ensuring precise and consistent bending force application throughout the operation.

### Q: How does the pivot bearing assembly contribute to bending accuracy?
**A**: The precision pivot bearing assembly provides smooth rotational movement with minimal play, allowing for accurate angular positioning during tube bending operations and reducing deflection for consistent bend quality.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Bending Arm Assembly](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/bending-arm-assembly)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: BENDING_ARM_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 274449f5
