---
title: "Doctoring System"
industry: "Paper Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DOCTORING_SYSTEM"
  data_integrity_hash: "254ec75674b3b6979621de9fbaa83a0c"
  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:DOCTORING_SYSTEM"
  data_source_uri: "https://cnfx.com/llms/industry/paper-manufacturing/product/doctoring-system.md"
  official_resource_url: "https://cnfx.com/industry/paper-manufacturing/product/doctoring-system"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "0.1-5.0 mm material thickness adjustment range, 0.5-3.0 m/s linear speed, 10-100 kN blade pressure"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 0.05
    unit: "mm"
    consequence: "Hertzian contact stress exceeding 1.5 GPa at blade-substrate interface causing plastic deformation, thermal expansion mismatch (Δα=12×10⁻⁶ K⁻¹) between steel blade and aluminum frame causing binding, resonance at 85-115 Hz exciting structural natural frequencies"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hydraulic pressure transient exceeding 150% nominal (from 20 MPa to 30 MPa)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrate pressure relief valve with 22 MPa cracking pressure and accumulator with 0.5 L capacity for surge absorption"
  - node_2:
      trigger: "Misalignment accumulation exceeding 0.2 mm/m over 3 m travel distance"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install laser alignment system with 0.01 mm resolution and closed-loop servo correction every 0.5 m of travel"
bom_nodes:
  doctor-blade-0:
    type: "component"
    urn: "URN:CNFX:ME:DOCTOR_BLADE_0"
    interface_type: "physical-logic-coupled"
  blade-holder-1:
    type: "part"
    urn: "URN:CNFX:ME:BLADE_HOLDER"
    interface_type: "physical-logic-coupled"
  adjustment-mechanism-2:
    type: "part"
    urn: "URN:CNFX:ME:ADJUSTMENT_MECHANISM"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 13485:2016 - MEDICAL DEVICES - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "ISO 14971:2019 - MEDICAL DEVICES - APPLICATION OF RISK MANAGEMENT"
    scope: "Verified Engineering Specification"
  - standard: "IEC 60601-1:2005+AMD1:2012+AMD2:2020 - MEDICAL ELECTRICAL EQUIPMENT - PART 1: GENERAL REQUIREMENTS FOR BASIC SAFETY AND ESSENTIAL PERFORMANCE"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/paper-manufacturing/product/doctoring-system.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "f328103d4fa84b7fe127c624fb34ac8eb114edeadad24a8c834994760cff4588"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Doctoring System

## 1. Technical Definition
A mechanical system designed to precisely level, spread, or remove excess material from a surface or substrate.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-5.0 mm material thickness adjustment range, 0.5-3.0 m/s linear speed, 10-100 kN blade pressure**. Failure boundary: **Blade deflection exceeding 0.05 mm at 100 kN load, bearing temperature exceeding 120°C, vibration amplitude exceeding 25 μm RMS at 100 Hz**, Mechanism: **Hertzian contact stress exceeding 1.5 GPa at blade-substrate interface causing plastic deformation, thermal expansion mismatch (Δα=12×10⁻⁶ K⁻¹) between steel blade and aluminum frame causing binding, resonance at 85-115 Hz exciting structural natural frequencies**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Hydraulic pressure transient exceeding 150% nominal (from 20 MPa to 30 MPa) | 8 | Seal extrusion and hydraulic fluid leakage at cylinder-piston interface | Integrate pressure relief valve with 22 MPa cracking pressure and accumulator with 0.5 L capacity for surge absorption |
| Misalignment accumulation exceeding 0.2 mm/m over 3 m travel distance | 8 | Asymmetric blade wear pattern causing 0.03 mm thickness variation across substrate width | Install laser alignment system with 0.01 mm resolution and closed-loop servo correction every 0.5 m of travel |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Blade Holder](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/blade-holder.md) `(Standalone System)`
- [Adjustment Mechanism](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/adjustment-mechanism.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Web Tension Control System**, **Paper Roll Handling Equipment**, **Surface Inspection System**  
**Downstream Applications**: Coated Paper, Laminated Paperboard, Specialty Paper Substrates  

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

### Q: What materials are used in this doctoring system and why?
**A**: This system uses hardened tool steel for durability in high-wear applications, polyurethane for flexibility and surface protection, and ceramic for precision and chemical resistance in paper manufacturing environments.

### Q: How does the adjustment mechanism improve paper manufacturing quality?
**A**: The precision adjustment mechanism allows operators to fine-tune blade pressure and angle, ensuring consistent material removal and surface leveling across the entire substrate width for uniform paper quality.

### Q: What maintenance is required for the doctor blade components?
**A**: Regular inspection of the blade holder and doctor blade for wear, periodic adjustment of the mechanism, and replacement of polyurethane components as needed to maintain optimal performance in continuous paper production.

## 6. Manufacturing Compliance
- ISO 13485:2016 - MEDICAL DEVICES - QUALITY MANAGEMENT SYSTEMS
- ISO 14971:2019 - MEDICAL DEVICES - APPLICATION OF RISK MANAGEMENT
- IEC 60601-1:2005+AMD1:2012+AMD2:2020 - MEDICAL ELECTRICAL EQUIPMENT - PART 1: GENERAL REQUIREMENTS FOR BASIC SAFETY AND ESSENTIAL PERFORMANCE

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Doctoring System](https://cnfx.com/industry/paper-manufacturing/product/doctoring-system)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: DOCTORING_SYSTEM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: cc39ec3d
