---
title: "Precision Fixture"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:PRECISION_FIXTURE"
  data_integrity_hash: "38c15f7b52fabac4d0fc9d7f710e9a18"
  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:PRECISION_FIXTURE"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/precision-fixture.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/precision-fixture"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-15 kN clamping force, 0.01-0.05 mm positioning accuracy, -20°C to 120°C operating temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 18
    unit: "kN"
    consequence: "Yield strength of hardened steel (typically 800-1200 MPa) exceeded at 18 kN load, thermal expansion coefficient mismatch (11.7×10⁻⁶/°C for steel vs 23.1×10⁻⁶/°C for aluminum) at high temperatures"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Cyclic loading at 12-15 kN range during repeated assembly cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement shot peening surface treatment to induce compressive residual stresses of -400 to -600 MPa"
  - node_2:
      trigger: "Thermal cycling between -20°C and 120°C at 5 cycles/hour"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Incorporate Invar 36 alloy (CTE 1.3×10⁻⁶/°C) inserts at critical alignment points"
bom_nodes:
  base-plate:
    type: "component"
    urn: "URN:CNFX:ME:BASE_PLATE"
    interface_type: "physical-logic-coupled"
  locating-pins:
    type: "component"
    urn: "URN:CNFX:ME:LOCATING_PINS"
    interface_type: "physical-logic-coupled"
  clamping-mechanism:
    type: "part"
    urn: "URN:CNFX:ME:CLAMPING_MECHANISM"
    interface_type: "physical-logic-coupled"
  mounting-brackets:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_BRACKETS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/precision-fixture.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "33a6d42d3e805610679ddee27c62ec5287c9f981f47a594c617f7e571513ec9c"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Precision Fixture

## 1. Technical Definition
A specialized holding device designed for accurate positioning and secure clamping of components during RF shield assembly processes.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-15 kN clamping force, 0.01-0.05 mm positioning accuracy, -20°C to 120°C operating temperature**. Failure boundary: **Clamping force exceeds 18 kN causing permanent deformation, positioning accuracy degrades beyond 0.1 mm, temperature exceeds 150°C causing thermal expansion mismatch**, Mechanism: **Yield strength of hardened steel (typically 800-1200 MPa) exceeded at 18 kN load, thermal expansion coefficient mismatch (11.7×10⁻⁶/°C for steel vs 23.1×10⁻⁶/°C for aluminum) at high temperatures**.

### 2.1 Analytical Physics Model
Governed by the **Rayleigh Resolution Criterion**:

> **Primary Equation**: $d = \frac{0.61 \lambda}{NA}$  
> **Engineering Impact**: Defines the theoretical limit of machine vision systems.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| \lambda | Wavelength | Engineering Constant |
| NA | Numerical Aperture | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Cyclic loading at 12-15 kN range during repeated assembly cycles | 8 | Fatigue crack initiation at clamping jaw root radius (stress concentration factor Kt=2.8) | Implement shot peening surface treatment to induce compressive residual stresses of -400 to -600 MPa |
| Thermal cycling between -20°C and 120°C at 5 cycles/hour | 8 | Differential thermal expansion causing 0.08 mm positional drift at interface surfaces | Incorporate Invar 36 alloy (CTE 1.3×10⁻⁶/°C) inserts at critical alignment points |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| 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)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **RF Shield Assembly Station**, **Automated Screw Driving System**, **Vision Inspection System**  
**Downstream Applications**: Smartphone RF Shields, Wi-Fi Router RF Shields, Automotive Electronics RF Shields  

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

### Q: What materials are used in the Precision Fixture and why?
**A**: The Precision Fixture uses aluminum alloy for lightweight durability and stainless steel for corrosion resistance and strength, ensuring precise, long-lasting performance in electronic manufacturing environments.

### Q: How does the Precision Fixture improve RF shield assembly processes?
**A**: It provides accurate positioning via locating pins and secure clamping through its mechanism, reducing assembly errors and increasing efficiency in RF shield production for computers and optical products.

### Q: What components are included in the Precision Fixture BOM?
**A**: The Bill of Materials includes a Base Plate for stability, Locating Pins for precision alignment, a Clamping Mechanism for secure holding, and Mounting Brackets for flexible installation in manufacturing setups.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Precision Fixture](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/precision-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**: PRECISION_FIXTURE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 8926fba9
