---
title: "Case Positioning Fixture"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:CASE_POSITIONING_FIXTURE"
  data_integrity_hash: "534d9bfa2c1c03ab75e293f12792e7e0"
  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:CASE_POSITIONING_FIXTURE"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/case-positioning-fixture.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/case-positioning-fixture"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.01-0.05 mm positioning tolerance, 0-150 N clamping force, -20°C to 80°C operating temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 0.1
    unit: "mm"
    consequence: "Thermal expansion coefficient mismatch (steel fixture vs. aluminum case: α=11×10⁻⁶/°C vs. 23×10⁻⁶/°C) causing positional drift, Hertzian contact stress exceeding yield strength (σ_y=250 MPa) at clamping interfaces, wear-induced clearance accumulation beyond kinematic constraint limits"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Thermal gradient of 50°C across fixture structure"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Invar alloy (α=1.2×10⁻⁶/°C) critical components, active thermal compensation with Peltier elements and RTD feedback"
  - node_2:
      trigger: "Vibration at 120 Hz resonance frequency with 0.5 g acceleration"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Anti-resonance mounting with 40 Hz natural frequency isolators, diamond-like carbon coating (HV=3000) on clamping surfaces"
bom_nodes:
  base-plate:
    type: "component"
    urn: "URN:CNFX:ME:BASE_PLATE"
    interface_type: "physical-logic-coupled"
  clamping-arm:
    type: "part"
    urn: "URN:CNFX:ME:CLAMPING_ARM"
    interface_type: "physical-logic-coupled"
  locating-pin:
    type: "component"
    urn: "URN:CNFX:ME:LOCATING_PIN"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/case-positioning-fixture.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "adbcef86a302c5df3844854a3fd64029e9b7eb67d05f7828481584f34e695f0a"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Case Positioning Fixture

## 1. Technical Definition
A specialized fixture designed to precisely hold and position a case or housing during assembly operations.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.01-0.05 mm positioning tolerance, 0-150 N clamping force, -20°C to 80°C operating temperature**. Failure boundary: **Positioning error exceeding 0.1 mm, clamping force exceeding 200 N causing plastic deformation, temperature exceeding 100°C causing thermal expansion beyond compensation range**, Mechanism: **Thermal expansion coefficient mismatch (steel fixture vs. aluminum case: α=11×10⁻⁶/°C vs. 23×10⁻⁶/°C) causing positional drift, Hertzian contact stress exceeding yield strength (σ_y=250 MPa) at clamping interfaces, wear-induced clearance accumulation beyond kinematic constraint limits**.

### 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 |
| :--- | :--- | :--- | :--- |
| Thermal gradient of 50°C across fixture structure | 8 | Positional drift of 0.08 mm due to differential thermal expansion | Invar alloy (α=1.2×10⁻⁶/°C) critical components, active thermal compensation with Peltier elements and RTD feedback |
| Vibration at 120 Hz resonance frequency with 0.5 g acceleration | 8 | Clamping force relaxation due to fretting wear at contact surfaces | Anti-resonance mounting with 40 Hz natural frequency isolators, diamond-like carbon coating (HV=3000) on clamping surfaces |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Clamping Arm](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/clamping-arm.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Automated Assembly Line Conveyor System**, **Precision Torque Control Screwdriver**, **Laser Alignment Measurement System**  
**Downstream Applications**: Industrial Gearboxes, Hydraulic Pump Housings, Electric Motor Casings  

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

### Q: What materials are used in this case positioning fixture?
**A**: This fixture is constructed from durable tool steel for structural components and lightweight aluminum alloy for moving parts, providing both strength and precision.

### Q: How does this fixture improve assembly operations?
**A**: The fixture precisely holds and positions cases or housings during assembly, reducing human error, increasing consistency, and speeding up production cycles.

### Q: What industries commonly use this type of positioning fixture?
**A**: This fixture is essential in machinery and equipment manufacturing, particularly for assembling engines, gearboxes, pumps, and other mechanical housings requiring precise alignment.

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

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

### 🌐 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**: CASE_POSITIONING_FIXTURE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 9b660f8e
