In steel forging production, rough machining plays a crucial role between forging and final precision machining. Especially after heat treatment such as normalizing or quenching & tempering, proper rough machining ensures dimensional stability and prepares the component for final processing.
1. Removing Machining Allowance
Forged blanks are designed with machining allowance. Rough machining helps to:
- Remove scale and surface imperfections
- Eliminate excess material
- Prepare for dimensional control
It also allows preliminary inspection of internal structure conditions.
2. Reducing Residual Stress Impact
After heat treatment, internal stress may remain. Rough machining can:
- Release part of the residual stress
- Detect potential deformation early
- Minimize dimensional deviation in final machining
This is particularly important for forged crane wheels and heavy-duty forged shafts.
3. Establishing Accurate Machining Reference
Rough machining establishes positioning references for precision machining, helping to:
- Improve efficiency
- Ensure dimensional consistency
- Reduce rework risks
For heavy open die forgings and industrial steel components, rough machining is a key stage in the manufacturing process.
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