---
title: "Bogie frame"
industry: "Motor Vehicle Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:BOGIE_FRAME"
  data_integrity_hash: "ed91fcfa9c05fb71282656cd68741ceb"
  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:BOGIE_FRAME"
  data_source_uri: "https://cnfx.com/llms/industry/motor-vehicle-manufacturing/product/bogie-frame.md"
  official_resource_url: "https://cnfx.com/industry/motor-vehicle-manufacturing/product/bogie-frame"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "Stress: 150-250 MPa, Deflection: 0.5-2.0 mm under 200 kN load"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 350
    unit: "MPa"
    consequence: "High-cycle fatigue from cyclic bending stresses exceeding 180 MPa at stress concentration points (e.g., weld toes with Kt=2.5)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Residual tensile stress &gt;200 MPa at weld zones from improper post-weld heat treatment"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Shot peening to induce 400-600 MPa compressive residual stress layer, reducing effective stress ratio to R&lt;0"
  - node_2:
      trigger: "Corrosion rate &gt;0.1 mm/year in chloride environments (ISO 9223 C4 category)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hot-dip galvanizing with 85 μm zinc coating per EN ISO 1461, plus epoxy-polyamide paint system (DFT: 120 μm)"
bom_nodes:
  side-frame:
    type: "component"
    urn: "URN:CNFX:ME:SIDE_FRAME"
    interface_type: "physical-logic-coupled"
  cross-membertransom:
    type: "component"
    urn: "URN:CNFX:ME:CROSS_MEMBERTRANSOM"
    interface_type: "physical-logic-coupled"
  bolster-attachment-points:
    type: "component"
    urn: "URN:CNFX:ME:BOLSTER_ATTACHMENT_POINTS"
    interface_type: "physical-logic-coupled"
  suspension-mounting-brackets:
    type: "component"
    urn: "URN:CNFX:ME:SUSPENSION_MOUNTING_BRACKETS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/motor-vehicle-manufacturing/product/bogie-frame.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "3a9b3974abb7de61e1e8e6cd2fd37fb206cb0b8535b450d379208b87c7ba2030"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Bogie frame

## 1. Technical Definition
The primary structural component of a bogie that supports the vehicle body and connects to the wheelsets.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Stress: 150-250 MPa, Deflection: 0.5-2.0 mm under 200 kN load**. Failure boundary: **Yield strength: 350 MPa (S355 steel), Fatigue limit: 180 MPa at 2×10⁶ cycles (R=-1)**, Mechanism: **High-cycle fatigue from cyclic bending stresses exceeding 180 MPa at stress concentration points (e.g., weld toes with Kt=2.5)**.

### 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 |
| :--- | :--- | :--- | :--- |
| Residual tensile stress &gt;200 MPa at weld zones from improper post-weld heat treatment | 8 | Fatigue crack initiation at weld toe propagating at 1×10⁻⁸ m/cycle (Paris' law, C=1.5×10⁻¹¹, m=3) | Shot peening to induce 400-600 MPa compressive residual stress layer, reducing effective stress ratio to R&lt;0 |
| Corrosion rate &gt;0.1 mm/year in chloride environments (ISO 9223 C4 category) | 8 | Stress corrosion cracking at corrosion pits with depth &gt;0.5 mm acting as stress concentrators (Kt&gt;3) | Hot-dip galvanizing with 85 μm zinc coating per EN ISO 1461, plus epoxy-polyamide paint system (DFT: 120 μm) |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **CNC Machining Center**, **Welding Robot System**, **Shot Blasting Machine**  
**Downstream Applications**: Railway Passenger Car, Freight Wagon, Metro Train  

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

### Q: What materials are used in manufacturing bogie frames?
**A**: Bogie frames are typically constructed from high-strength steel, cast steel, or welded steel to ensure durability and structural integrity under heavy loads.

### Q: What are the main components of a bogie frame assembly?
**A**: Key components include the side frame, cross member/transom, bolster attachment points, and suspension mounting brackets, which work together to support the vehicle body.

### Q: How does a bogie frame contribute to vehicle performance?
**A**: The bogie frame distributes weight evenly, connects the wheelsets to the vehicle body, and provides mounting points for suspension systems, ensuring stability and smooth operation.

## 6. Manufacturing Compliance

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Bogie frame](https://cnfx.com/industry/motor-vehicle-manufacturing/product/bogie-frame)**

### 🌐 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**: BOGIE_FRAME | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 7d9dcadd
