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grabowski a0c843204d Update mechanical folder structure for multiple sub-assemblies

- 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

2025-08-04 14:30:36 +07:00

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/mechanical/drawings

2D technical drawings and specifications for all mechanical components.

Purpose

This directory contains 2D technical drawings, specifications, and documentation for manufacturing, assembly, and quality control of all mechanical components and sub-assemblies.

Drawing Organization

Organize drawings by type and sub-assembly:

drawings/
├── assembly-drawings/          # Overall system and sub-assembly drawings
│   ├── main-assembly-drawing.pdf
│   ├── pcb-mount-assembly.pdf
│   ├── sensor-housing-assembly.pdf
│   └── connector-panel-assembly.pdf
├── detail-drawings/            # Individual part drawings
│   ├── machined-parts/
│   ├── sheet-metal-parts/
│   ├── molded-parts/
│   └── standard-hardware/
├── interface-drawings/         # Mating part specifications
│   ├── pcb-interface-spec.pdf
│   ├── connector-interface-spec.pdf
│   ├── mounting-interface-spec.pdf
│   └── cable-interface-spec.pdf
└── manufacturing-drawings/     # Fabrication specifications
    ├── machining-drawings/
    ├── sheet-metal-drawings/
    ├── molding-drawings/
    └── 3d-printing-drawings/

Drawing Types

Assembly Drawings

Overall Assembly: Complete system with all sub-assemblies
Sub-Assembly: Individual functional groups
Exploded Views: Component relationships and assembly sequence
Section Views: Internal construction and interfaces
Installation Drawings: Mounting and positioning requirements

Detail Drawings

Part Drawings: Individual component specifications
Fabrication Drawings: Manufacturing process details
Inspection Drawings: Quality control and measurement points
Modification Drawings: Engineering changes and updates

Interface Drawings

Mechanical Interfaces: Mating surfaces and clearances
Electrical Interfaces: Connector positions and orientations
Thermal Interfaces: Heat transfer surfaces and requirements
Fluid Interfaces: Sealing and flow requirements

Drawing Standards

Dimensioning and Tolerancing

GD&T: Geometric dimensioning and tolerancing per ASME Y14.5
Critical Dimensions: Identify key functional dimensions
Tolerance Stack-up: Analysis of cumulative tolerances
Inspection Requirements: Measurement methods and equipment

Drawing Format

Title Block: Part number, revision, date, approvals
Drawing Scale: Appropriate scale for clarity
View Selection: Minimum views to fully define geometry
Section Views: Internal features and construction
Detail Views: Enlarged views of critical features

Material Specifications

Material Callouts: Specific material grades and specifications
Heat Treatment: Required thermal processing
Surface Finish: Roughness and appearance requirements
Coating/Plating: Protective and decorative finishes
Hardware Specifications: Fastener grades and specifications

Manufacturing Information

Machining Drawings

Setup Instructions: Workholding and fixturing requirements
Tool Requirements: Cutting tools and parameters
Inspection Points: Critical dimensions and tolerances
Surface Finish: Machining quality requirements

Sheet Metal Drawings

Bend Allowances: Material deformation calculations
Forming Operations: Bending, punching, and cutting sequences
Weld Symbols: Welding specifications and requirements
Finishing Operations: Deburring, cleaning, and coating

Molding Drawings

Draft Angles: Mold release requirements
Parting Lines: Mold separation surfaces
Gate Locations: Material injection points
Ejector Pin Locations: Part removal mechanisms

3D Printing Drawings

Print Orientation: Optimal build direction
Support Requirements: Support material locations
Post-Processing: Required finishing operations
Material Specifications: Filament or resin requirements

Quality Control

Inspection Drawings

Measurement Points: Critical dimension locations
Inspection Methods: Required measurement techniques
Acceptance Criteria: Pass/fail specifications
Documentation Requirements: Inspection record keeping

Testing Specifications

Functional Testing: Performance verification requirements
Environmental Testing: Temperature, humidity, vibration
Durability Testing: Lifecycle and wear requirements
Safety Testing: Regulatory compliance verification

File Management

Drawing Revisions

Revision Control: Systematic revision tracking
Change Documentation: Engineering change orders (ECOs)
Approval Process: Design review and sign-off procedures
Distribution Control: Controlled document distribution

File Formats

PDF: Standard format for manufacturing and inspection
DWG/DXF: CAD-compatible formats for editing
Native CAD: Original drawing files for modifications
Archive Formats: Long-term storage and retrieval

Documentation Standards

Drawing Numbers: Systematic part numbering system
Revision Letters: Alphabetical revision tracking
Date Formats: Consistent date representation
Approval Signatures: Required design approvals
Distribution Lists: Controlled document recipients

5.3 KiB Raw Blame History