---
title: "Ram / Punch"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:RAM_PUNCH"
  data_integrity_hash: "0ac5a3b225620f7bfc852db892d3408e"
  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:RAM_PUNCH"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/ram-punch.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/ram-punch"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "15-70 MPa hydraulic pressure, 0.1-2.5 m/s downward velocity, 0.01-0.1 mm positioning accuracy"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 550
    unit: "MPa"
    consequence: "High-cycle fatigue from cyclic bending loads exceeding 10^6 cycles at 250 MPa alternating stress, hydraulic fluid contamination causing abrasive wear at 5 μm particle size threshold, thermal expansion mismatch between steel ram (11.5 μm/m·K) and guide bushings (23 μm/m·K) at ΔT &gt; 40°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 3 μm absolute filtration with differential pressure monitoring at 0.3 bar threshold"
  - node_2:
      trigger: "Eccentric loading causing 15% side force component relative to axial load"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement load sensing with 4-point strain gauge array and automatic ram retraction at 5 kN lateral force"
bom_nodes:
  tool-holder:
    type: "part"
    urn: "URN:CNFX:ME:TOOL_HOLDER"
    interface_type: "physical-logic-coupled"
  guide-bushings:
    type: "component"
    urn: "URN:CNFX:ME:GUIDE_BUSHINGS"
    interface_type: "physical-logic-coupled"
  hydraulic-cylinder-connection:
    type: "component"
    urn: "URN:CNFX:ME:HYDRAULIC_CYLINDER_CONNECTION"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 286-1:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS - LIMITS AND FITS)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI B4.1-1967 (PREFERRED LIMITS AND FITS FOR CYLINDRICAL PARTS)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 7150-1:2017 (SYSTEM OF LIMITS AND FITS - PART 1: BASES OF TOLERANCES, DEVIATIONS AND FITS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/ram-punch.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "9affd1b1edb44b176a3b96727a3b315c36ed7be0a3b5793e1b592e5f0e6d7f81"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Ram / Punch

## 1. Technical Definition
The primary moving component of a hydraulic press brake that applies downward force to bend sheet metal.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **15-70 MPa hydraulic pressure, 0.1-2.5 m/s downward velocity, 0.01-0.1 mm positioning accuracy**. Failure boundary: **Material yield strength exceeded at 550 MPa stress concentration, hydraulic pressure exceeds 85 MPa causing seal extrusion, ram deflection exceeds 0.15 mm/m length**, Mechanism: **High-cycle fatigue from cyclic bending loads exceeding 10^6 cycles at 250 MPa alternating stress, hydraulic fluid contamination causing abrasive wear at 5 μm particle size threshold, thermal expansion mismatch between steel ram (11.5 μm/m·K) and guide bushings (23 μm/m·K) at ΔT &gt; 40°C**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | 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 | Seal extrusion and scoring of ram surface at 0.5 mm depth | Install 3 μm absolute filtration with differential pressure monitoring at 0.3 bar threshold |
| Eccentric loading causing 15% side force component relative to axial load | 8 | Guide bushing galling and ram binding at 0.08 mm lateral deflection | Implement load sensing with 4-point strain gauge array and automatic ram retraction at 5 kN lateral force |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hydraulic Power Unit**, **CNC Back Gauge System**, **Sheet Metal Handling Robot**  
**Downstream Applications**: Metal Enclosures, Automotive Body Panels, Aircraft Structural Components  

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

### Q: What materials are used in manufacturing press brake rams/punches?
**A**: Our rams/punches are crafted from high-grade alloy steel or tool steel, selected for durability, wear resistance, and optimal performance in heavy-duty metal bending applications.

### Q: How does the ram/punch integrate with other press brake components?
**A**: The ram/punch connects to the hydraulic cylinder via a secure connection and interfaces with tool holders and guide bushings to ensure precise, stable force application during bending operations.

### Q: What maintenance is required for press brake rams/punches?
**A**: Regular inspection for wear, proper lubrication of guide bushings, and ensuring hydraulic connections remain tight are key. Using compatible tooling and avoiding overloading also extends service life.

## 6. Manufacturing Compliance
- ISO 286-1:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS - LIMITS AND FITS)
- ANSI B4.1-1967 (PREFERRED LIMITS AND FITS FOR CYLINDRICAL PARTS)
- DIN 7150-1:2017 (SYSTEM OF LIMITS AND FITS - PART 1: BASES OF TOLERANCES, DEVIATIONS AND FITS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Ram / Punch](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/ram-punch)**

### 🌐 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**: RAM_PUNCH | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: d39307d6
