---
title: "Workpiece Fixture"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:WORKPIECE_FIXTURE"
  data_integrity_hash: "3c2070b867c9455aa7170c4954cd282f"
  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:WORKPIECE_FIXTURE"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/workpiece-fixture.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/workpiece-fixture"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "0.5-25 kN clamping force, 0.01-0.1 mm positioning accuracy, -20°C to 150°C temperature range"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 30
    unit: "kN"
    consequence: "Plastic deformation at yield strength (typically 250-400 MPa for steel fixtures), thermal expansion coefficient mismatch (α=11.7×10⁻⁶/°C for steel vs α=23×10⁻⁶/°C for aluminum workpiece), fatigue failure at stress concentration points (notch factor Kt=2.5-4.0)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Cyclic loading at 10⁶ cycles exceeding 50% of yield strength"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Design with fillet radii R≥3t (t=material thickness), shot peening to induce compressive residual stress of 400-600 MPa"
  - node_2:
      trigger: "Thermal gradient of 100°C across fixture-workpiece interface"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Material matching with thermal expansion coefficient difference Δα≤5×10⁻⁶/°C, active thermal compensation using Peltier elements with 0.1°C control accuracy"
bom_nodes:
  base-plate-0:
    type: "component"
    urn: "URN:CNFX:ME:BASE_PLATE_0"
    interface_type: "physical-logic-coupled"
  locating-pins-1:
    type: "component"
    urn: "URN:CNFX:ME:LOCATING_PINS_1"
    interface_type: "physical-logic-coupled"
  clamping-mechanism-2:
    type: "part"
    urn: "URN:CNFX:ME:CLAMPING_MECHANISM"
    interface_type: "physical-logic-coupled"
  quick-change-adapter-3:
    type: "part"
    urn: "URN:CNFX:ME:QUICK_CHANGE_ADAPTER"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "ANSI B5.54-2005 - METHODS FOR PERFORMANCE EVALUATION OF COMPUTER NUMERICALLY CONTROLLED MACHINING CENTERS"
    scope: "Verified Engineering Specification"
  - standard: "DIN 69893-1:2012 - TOOL HOLDERS FOR MACHINE TOOLS - SHANKS AND RECEIVING BORES FOR TOOL HOLDERS WITH CYLINDRICAL SHANK"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/workpiece-fixture.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "fdb960d9088773a14f8e111b6bcb1b58d2ea1c61a277cc43e230002e22c59cd2"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Workpiece Fixture

## 1. Technical Definition
A mechanical device used to securely hold and position a workpiece during manufacturing operations

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-25 kN clamping force, 0.01-0.1 mm positioning accuracy, -20°C to 150°C temperature range**. Failure boundary: **Clamping force exceeds 30 kN causing permanent deformation, positioning error exceeds 0.15 mm, temperature exceeds 200°C causing thermal expansion beyond 0.2%**, Mechanism: **Plastic deformation at yield strength (typically 250-400 MPa for steel fixtures), thermal expansion coefficient mismatch (α=11.7×10⁻⁶/°C for steel vs α=23×10⁻⁶/°C for aluminum workpiece), fatigue failure at stress concentration points (notch factor Kt=2.5-4.0)**.

### 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 |
| :--- | :--- | :--- | :--- |
| Cyclic loading at 10⁶ cycles exceeding 50% of yield strength | 8 | Fatigue crack propagation at fixture base mounting holes | Design with fillet radii R≥3t (t=material thickness), shot peening to induce compressive residual stress of 400-600 MPa |
| Thermal gradient of 100°C across fixture-workpiece interface | 8 | Differential thermal expansion causing 0.3 mm positional drift | Material matching with thermal expansion coefficient difference Δα≤5×10⁻⁶/°C, active thermal compensation using Peltier elements with 0.1°C control accuracy |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Clamping Mechanism](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/clamping-mechanism.md) `(Standalone System)`
- [Quick-Change Adapter](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/quick-change-adapter.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **CNC Machining Center**, **Coordinate Measuring Machine**, **Industrial Robot Arm**  
**Downstream Applications**: Automotive Engine Blocks, Aerospace Turbine Blades, Medical Implant Components  

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

### Q: What materials are used in this workpiece fixture?
**A**: This workpiece fixture is constructed from high-grade steel and aluminum alloy, providing optimal durability and precision for industrial manufacturing applications.

### Q: How does the quick-change adapter improve manufacturing efficiency?
**A**: The quick-change adapter allows operators to rapidly switch between different workpiece setups without extensive recalibration, significantly reducing downtime and increasing production throughput.

### Q: What types of manufacturing operations is this fixture suitable for?
**A**: This workpiece fixture is designed for various machining operations including milling, drilling, grinding, and assembly processes in machinery and equipment manufacturing environments.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- ANSI B5.54-2005 - METHODS FOR PERFORMANCE EVALUATION OF COMPUTER NUMERICALLY CONTROLLED MACHINING CENTERS
- DIN 69893-1:2012 - TOOL HOLDERS FOR MACHINE TOOLS - SHANKS AND RECEIVING BORES FOR TOOL HOLDERS WITH CYLINDRICAL SHANK

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Workpiece Fixture](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/workpiece-fixture)**

### 🌐 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**: WORKPIECE_FIXTURE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 35f408fa
