Q1: Bending in Long Shafts
• Problem: Basic tailstacks lose grip → middle sags during cutting.
• Our Solution: Programmable hydraulic steady rests with auto-pressure adjustment.
• Case Result:
– 2,900 mm shafts
– Reject rate: 14% → 0% (on next 3,200 pieces)
– Cost saved: $9,100 (straightening & assembly disputes avoided)
Q2: Inconsistent Custom Threads & Splines
• Root Cause: Unstable spindle speed / worn tooling → tool wander.
• Our Precision: Constant surface speed + rigid threading bars + in-process checking.
• Case Result:
– 4,300 stainless valve bodies
– Leak rejects: 8% → 0.3%
– Outcome: Final inspection staff reduced.
Q3: Rough Internal Bores on Aluminum Parts
• Issue: Trapped chips → tool vibration → need for extra honing.
• Our Method: Through-tool high-pressure coolant + vibration-damped boring bars.
• Case Result:
– 5,100 aluminum housings
– Internal Ra: 1.3 → 0.45 (direct from machine)
– Honing step eliminated, saving $7,600.
Q4: Diameter Drift When Scaling Production
• Cause: Gradual tool wear missed by manual operators.
• Our Control: CNC with auto-tool compensation + in-cycle probing (every 15–20 pcs).
• Case Result:
– Scaled from 150 prototypes to 6,400 bushings
– Diameter held within ±0.003 mm entire run
– Yield: 76% → 98.2%
Q5: High Tooling Costs on Exotic Alloys (e.g., Inconel)
• Challenge: Heat & built-up edge destroy standard carbide.
• Our Strategy: Mist coolant + negative-rake ceramic inserts.
• Case Result:
– 3,700 Inconel shafts
– Insert life: 22 → 71 pieces per insert
– Tooling cost: ↓33%, “surprise surcharges” eliminated.
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