Skill for manufacturing process planning including operation sequencing and work instructions
The Manufacturing Process Planning skill provides capabilities for developing comprehensive manufacturing process plans including operation sequencing, work instructions, and quality controls for mechanical component production.
Production Requirements
Available Resources
General sequence:
1. Raw material preparation
2. Primary forming/roughing
3. Secondary operations
4. Finishing operations
5. Heat treatment (if required)
6. Final machining (post-heat treat)
7. Surface treatment/coating
8. Final inspection
9. Packaging
| Feature | Possible Operations | Selection Criteria |
|---|---|---|
| External cylinder | Turning, grinding | Tolerance, finish |
| Internal cylinder | Boring, drilling, reaming | Diameter, depth |
| Flat surface | Milling, grinding, lapping | Flatness, finish |
| Gear teeth | Hobbing, shaping, grinding | Accuracy, volume |
| Thread | Tapping, thread milling, rolling | Size, accuracy |
| Heat treat | Quench/temper, carburize, nitride | Hardness, depth |
Selection criteria:
- Workpiece size vs machine envelope
- Required tolerances vs machine capability
- Surface finish capability
- Spindle power vs material removal
- Tool capacity
- Automation potential
Typical capabilities:
Turning: IT7-IT9, Ra 0.8-3.2 um
Milling: IT7-IT10, Ra 0.8-6.3 um
Grinding: IT5-IT7, Ra 0.1-0.8 um
EDM: IT6-IT8, Ra 0.2-6.3 um
Honing: IT4-IT6, Ra 0.05-0.4 um
Total cycle time = Setup time + Processing time + Non-productive time
Processing time per operation:
T_process = (L + A) / (f * N) + tool change time
Where:
L = length of cut
A = approach distance
f = feed rate
N = spindle speed
| Activity | Typical Time |
|---|---|
| Load/unload (manual) | 15-60 seconds |
| Tool change (CNC) | 3-10 seconds |
| Index (turret) | 1-3 seconds |
| Probe cycle | 5-15 seconds |
| Deburr (manual) | 30-120 seconds |
Header Information
Setup Instructions
Operating Instructions
Visual Aids
Process Step -> Potential Failure Mode -> Effect -> Cause
Severity (S): 1-10 scale
Occurrence (O): 1-10 scale
Detection (D): 1-10 scale
RPN = S x O x D
Actions required for RPN > 100 (typically)
| Process | Failure Mode | Cause | Detection |
|---|---|---|---|
| Machining | Dimension out of tolerance | Tool wear | In-process gage |
| Heat treat | Incorrect hardness | Temperature error | Hardness test |
| Welding | Porosity | Contamination | NDT |
| Assembly | Missing component | Operator error | Check sheet |
For each operation:
- Process step
- Machine/device
- Characteristic (dimension, property)
- Specification/tolerance
- Measurement method
- Sample size and frequency
- Control method
- Reaction plan
{
"part_info": {
"part_number": "string",
"revision": "string",
"material": "string"
},
"design_requirements": {
"drawing_reference": "string",
"critical_dimensions": "array",
"surface_finish_requirements": "array"
},
"production_requirements": {
"annual_volume": "number",
"lot_size": "number",
"lead_time": "number (weeks)"
},
"available_equipment": "array of machine types"
}
{
"process_plan": {
"routing_number": "string",
"operations": [
{
"op_number": "number",
"description": "string",
"work_center": "string",
"setup_time": "number (min)",
"cycle_time": "number (min)",
"tooling": "array",
"inspection_points": "array"
}
],
"total_lead_time": "number (days)"
},
"work_instructions": "array of document references",
"process_fmea": "document reference",
"control_plan": "document reference",
"cost_estimate": {
"material": "number",
"labor": "number",
"overhead": "number",
"total": "number"
}
}