grabowski
a0c843204d
- Refactor mechanical/ directory to support multiple sub-assemblies instead of just enclosures - Update mechanical/README.md with comprehensive sub-assembly organization examples - Enhance mechanical/cad/README.md with detailed sub-assembly structure (PCB mounts, sensor housing, connector panels, cooling, etc.) - Expand mechanical/enclosure/README.md to cover main housing, sub-enclosures, and removable panels - Improve mechanical/stl/README.md with broader 3D printing categories including tooling, prototyping, and custom components - Update mechanical/drawings/README.md with comprehensive technical drawing organization for all mechanical components - Add detailed manufacturing considerations, quality control procedures, and file management guidelines - Support complex projects with multiple mechanical sub-systems and assemblies
138 lines
5.3 KiB
Markdown
138 lines
5.3 KiB
Markdown
# /mechanical/drawings
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2D technical drawings and specifications for all mechanical components.
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## Purpose
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This directory contains 2D technical drawings, specifications, and documentation for manufacturing, assembly, and quality control of all mechanical components and sub-assemblies.
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## Drawing Organization
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Organize drawings by type and sub-assembly:
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```
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drawings/
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├── assembly-drawings/ # Overall system and sub-assembly drawings
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│ ├── main-assembly-drawing.pdf
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│ ├── pcb-mount-assembly.pdf
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│ ├── sensor-housing-assembly.pdf
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│ └── connector-panel-assembly.pdf
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├── detail-drawings/ # Individual part drawings
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│ ├── machined-parts/
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│ ├── sheet-metal-parts/
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│ ├── molded-parts/
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│ └── standard-hardware/
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├── interface-drawings/ # Mating part specifications
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│ ├── pcb-interface-spec.pdf
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│ ├── connector-interface-spec.pdf
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│ ├── mounting-interface-spec.pdf
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│ └── cable-interface-spec.pdf
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└── manufacturing-drawings/ # Fabrication specifications
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├── machining-drawings/
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├── sheet-metal-drawings/
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├── molding-drawings/
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└── 3d-printing-drawings/
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```
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## Drawing Types
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### Assembly Drawings
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- **Overall Assembly**: Complete system with all sub-assemblies
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- **Sub-Assembly**: Individual functional groups
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- **Exploded Views**: Component relationships and assembly sequence
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- **Section Views**: Internal construction and interfaces
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- **Installation Drawings**: Mounting and positioning requirements
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### Detail Drawings
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- **Part Drawings**: Individual component specifications
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- **Fabrication Drawings**: Manufacturing process details
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- **Inspection Drawings**: Quality control and measurement points
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- **Modification Drawings**: Engineering changes and updates
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### Interface Drawings
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- **Mechanical Interfaces**: Mating surfaces and clearances
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- **Electrical Interfaces**: Connector positions and orientations
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- **Thermal Interfaces**: Heat transfer surfaces and requirements
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- **Fluid Interfaces**: Sealing and flow requirements
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## Drawing Standards
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### Dimensioning and Tolerancing
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- **GD&T**: Geometric dimensioning and tolerancing per ASME Y14.5
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- **Critical Dimensions**: Identify key functional dimensions
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- **Tolerance Stack-up**: Analysis of cumulative tolerances
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- **Inspection Requirements**: Measurement methods and equipment
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### Drawing Format
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- **Title Block**: Part number, revision, date, approvals
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- **Drawing Scale**: Appropriate scale for clarity
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- **View Selection**: Minimum views to fully define geometry
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- **Section Views**: Internal features and construction
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- **Detail Views**: Enlarged views of critical features
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### Material Specifications
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- **Material Callouts**: Specific material grades and specifications
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- **Heat Treatment**: Required thermal processing
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- **Surface Finish**: Roughness and appearance requirements
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- **Coating/Plating**: Protective and decorative finishes
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- **Hardware Specifications**: Fastener grades and specifications
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## Manufacturing Information
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### Machining Drawings
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- **Setup Instructions**: Workholding and fixturing requirements
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- **Tool Requirements**: Cutting tools and parameters
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- **Inspection Points**: Critical dimensions and tolerances
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- **Surface Finish**: Machining quality requirements
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### Sheet Metal Drawings
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- **Bend Allowances**: Material deformation calculations
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- **Forming Operations**: Bending, punching, and cutting sequences
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- **Weld Symbols**: Welding specifications and requirements
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- **Finishing Operations**: Deburring, cleaning, and coating
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### Molding Drawings
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- **Draft Angles**: Mold release requirements
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- **Parting Lines**: Mold separation surfaces
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- **Gate Locations**: Material injection points
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- **Ejector Pin Locations**: Part removal mechanisms
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### 3D Printing Drawings
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- **Print Orientation**: Optimal build direction
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- **Support Requirements**: Support material locations
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- **Post-Processing**: Required finishing operations
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- **Material Specifications**: Filament or resin requirements
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## Quality Control
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### Inspection Drawings
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- **Measurement Points**: Critical dimension locations
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- **Inspection Methods**: Required measurement techniques
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- **Acceptance Criteria**: Pass/fail specifications
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- **Documentation Requirements**: Inspection record keeping
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### Testing Specifications
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- **Functional Testing**: Performance verification requirements
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- **Environmental Testing**: Temperature, humidity, vibration
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- **Durability Testing**: Lifecycle and wear requirements
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- **Safety Testing**: Regulatory compliance verification
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## File Management
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### Drawing Revisions
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- **Revision Control**: Systematic revision tracking
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- **Change Documentation**: Engineering change orders (ECOs)
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- **Approval Process**: Design review and sign-off procedures
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- **Distribution Control**: Controlled document distribution
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### File Formats
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- **PDF**: Standard format for manufacturing and inspection
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- **DWG/DXF**: CAD-compatible formats for editing
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- **Native CAD**: Original drawing files for modifications
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- **Archive Formats**: Long-term storage and retrieval
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## Documentation Standards
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- **Drawing Numbers**: Systematic part numbering system
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- **Revision Letters**: Alphabetical revision tracking
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- **Date Formats**: Consistent date representation
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- **Approval Signatures**: Required design approvals
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- **Distribution Lists**: Controlled document recipients
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