---
title: "Screed assembly"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SCREED_ASSEMBLY"
  data_integrity_hash: "b15e8a9c5f3574c073e1cf645f1fd6ac"
  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:SCREED_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/screed-assembly.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/screed-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-3.0 MPa hydraulic pressure, 0-100 mm vibration amplitude, 0-60°C operating temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 3.5
    unit: "MPa"
    consequence: "Hydraulic seal failure due to extrusion at 3.5 MPa pressure differential, structural fatigue from resonance at 120 mm amplitude (natural frequency 25-35 Hz), thermal degradation of ISO VG 46 hydraulic fluid above 80°C"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hydraulic fluid contamination exceeding ISO 4406 18/16/13 cleanliness level"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install 10 μm absolute beta₃≥200 hydraulic filters with differential pressure monitoring"
  - node_2:
      trigger: "Concrete mix segregation with aggregate size &gt;25 mm"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement laser-guided grade control with 1 mm accuracy and automatic plate elevation adjustment"
bom_nodes:
  vibrating-beam:
    type: "part"
    urn: "URN:CNFX:ME:VIBRATING_BEAM"
    interface_type: "physical-logic-coupled"
  leveling-plate:
    type: "component"
    urn: "URN:CNFX:ME:LEVELING_PLATE"
    interface_type: "physical-logic-coupled"
  mounting-frame:
    type: "part"
    urn: "URN:CNFX:ME:MOUNTING_FRAME"
    interface_type: "physical-logic-coupled"
  vibration-motor:
    type: "part"
    urn: "URN:CNFX:ME:VIBRATION_MOTOR"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "EN 13813:2002 - SCREED MATERIALS AND FLOOR SCREEDS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/screed-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "12776b69ab96862ae79f0b934c7f74e7ce1408e4ae77e2b3167e4ad7376cc313"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Screed assembly

## 1. Technical Definition
A critical component of concrete paving equipment that levels, compacts, and finishes freshly placed concrete to specified thickness and surface smoothness.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-3.0 MPa hydraulic pressure, 0-100 mm vibration amplitude, 0-60°C operating temperature**. Failure boundary: **Hydraulic pressure exceeding 3.5 MPa causes seal extrusion, vibration amplitude &gt;120 mm induces structural resonance, temperature &gt;80°C degrades hydraulic fluid viscosity below 10 cSt**, Mechanism: **Hydraulic seal failure due to extrusion at 3.5 MPa pressure differential, structural fatigue from resonance at 120 mm amplitude (natural frequency 25-35 Hz), thermal degradation of ISO VG 46 hydraulic fluid above 80°C**.

### 2.1 Analytical Physics Model
Governed by the **Harmonic Vibration Force Generation**:

> **Primary Equation**: $F_e = m \cdot r \cdot \omega^2 \sin(\omega t)$  
> **Engineering Impact**: Calculates centrifugal force for vibratory sifters/feeders.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| m | Eccentric Mass | Engineering Constant |
| r | Radius | Engineering Constant |
| \omega | Angular Frequency | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Hydraulic fluid contamination exceeding ISO 4406 18/16/13 cleanliness level | 8 | Servo valve spool sticking causing uneven screed plate elevation | Install 10 μm absolute beta₃≥200 hydraulic filters with differential pressure monitoring |
| Concrete mix segregation with aggregate size &gt;25 mm | 8 | Screed plate abrasion wear rate exceeding 0.1 mm/hour | Implement laser-guided grade control with 1 mm accuracy and automatic plate elevation adjustment |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Vibrating beam](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/vibrating-beam.md) `(Standalone System)`
- [Mounting frame](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/mounting-frame.md) `(Standalone System)`
- [Vibration motor](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/vibration-motor.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Concrete Mixer Truck**, **Concrete Placer/Spreader**, **Concrete Finishing Machine**  
**Downstream Applications**: Concrete Pavement Slabs, Concrete Road Surfaces, Concrete Floor Slabs  

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

### Q: What materials are used in high-performance screed assemblies?
**A**: Our screed assemblies utilize high-strength steel, abrasion-resistant alloys, and hardened wear plates for maximum durability in demanding concrete paving applications.

### Q: How does the vibrating beam improve concrete finishing?
**A**: The vibrating beam, powered by a dedicated vibration motor, ensures proper compaction and eliminates air pockets, resulting in a denser, smoother concrete surface with consistent thickness.

### Q: What maintenance is required for screed assemblies?
**A**: Regular inspection of wear plates, checking vibration motor function, and ensuring proper mounting frame alignment are essential for maintaining optimal screed assembly performance and longevity.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- EN 13813:2002 - SCREED MATERIALS AND FLOOR SCREEDS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Screed assembly](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/screed-assembly)**

### 🌐 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**: SCREED_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 69979c4a
