Requirement Specification Template Welding Fixture
TemplatesWhat is a requirement specification for a welding fixture? A requirement specification (Lastenheft) for a welding fixture defines all technical and functional requirements that a toolmaking partner must fulfill. It serves as the foundation for design, manufacturing, and final acceptance of manual or automated welding fixtures, ensuring compliance with tolerances and safety standards.
Why use this template?
This template assists you in creating a comprehensive requirement specification for manual welding fixtures and supports the overall project management process. It saves time by providing pre-defined standard requirements and ensures that critical aspects—such as grounding, heat dissipation, or accessibility—are not overlooked.
Overview of Requirement Structure
Below is a live preview of the structured requirements. This list covers essential categories including Mechanical Design, Ergonomics, Safety, and Documentation.
| Structure element | Requirement | Description | Tags |
|---|---|---|---|
1 Base Frame & Substructure | Structural Rigidity & Vibration Damping | The base frame must be self-supporting to minimize distortion due to welding heat. Max deflection under load 0.1mm. | Functional |
2 Positioning & RPS (Reference Point System) | Defined Workpiece Location (3-2-1 Principle) | Positioning via two cylindrical pins (F7 fit) and three hardened support pads. | Functional |
2 Positioning & RPS (Reference Point System) | Avoidance of Over-Constraining | Clamping points must be selected to avoid inducing stress in the workpiece. Respect degrees of freedom. | Functional |
3 Clamping & Holding Technology | Torch Accessibility | Provide at least 30mm clearance around every weld seam for the torch nozzle. | Functional |
3 Clamping & Holding Technology | Wear Protection for Clamps | All contact points with the workpiece must be designed as easily replaceable wear parts (e.g., CuCrZr inserts). | Maintenance |
4 Welding Process Interfaces | Defined Earth Grounding (Return Path) | Grounding cable must be routed directly to the most heavily loaded clamping station. Exclude current flow through bearings. | Safety |
4 Welding Process Interfaces | Weld Spatter Protection | Pneumatic lines and threads must be protected by covers or heat-resistant sleeving from spatter. | Maintenance |
5 Safety & Ergonomics | Pinch Point Mitigation | Maintain a safety gap of 25mm between moving clamp arms and fixed frame parts or provide guarding. | Safety |
5 Safety & Ergonomics | Operator Loading Ergonomics | Maximum loading depth of 450mm from the front edge must not be exceeded. | Safety |
How to use this template in the ETRM system
To use these requirements for your own project, follow these steps:
- Log in to your ETRM account.
- Create a new project group or select an existing project.
- Under "Templates", select the Welding Fixture Template.
- Customize the requirements to fit your specific design specifications.