一、 Precision machining process control
1. Optimization of cutting parameters
Turning/milling:
The precision turning accuracy can reach IT5 level (tolerance ≤ 0.01mm), and it is necessary to control the spindle radial runout ≤ 0.005mm and feed rate ≤ 0.05mm/r.
Stainless steel precision machining needs to be divided into three processes: coarse, medium, and fine. The residual gradient should be controlled at 0.2mm → 0.05mm → 0.01mm to avoid rough cutting marks.
Grinding:
The linear speed of the grinding wheel is ≥ 35m/s, the feed rate of the workpiece is ≤ 0.5m/min, and the surface roughness can reach Ra 0.01 μ m (such as in bearing raceway machining).
二、 Full process accuracy verification system
1. Online monitoring technology
Multi sensor fusion: Integrating laser displacement sensors (accuracy ± 1 μ m) and vibration sensors (sampling rate 10kHz) in the machine measurement system to reconstruct the machining path in real time.
Tool status monitoring: Detecting chip deposits through acoustic emission signals, and automatically adjusting cutting parameters when the signal amplitude is greater than 5dB.
2. Ultimate testing standards
Dimensional tolerance: Critical dimension CPK ≥ 1.67, three coordinate measurement sampling points ≥ 12 points/feature (ambient temperature 23 ± 1 ℃).
Functional verification:
Moving parts need to pass 10 ⁵ fatigue tests (with a load of 120% of the rated value)
Sealing helium leak detection rate ≤ 1 × 10 ⁻⁶ mbar · L/s
三、 Frontier precision improvement technology
Laser assisted processing
When processing difficult to cut materials (such as titanium alloys), a 500W laser is used for local preheating (temperature gradient ≤ 100 ℃/mm) to reduce cutting force by 40% and improve surface roughness by 50%.
Composite machining center
The car milling composite equipment integrates RTCP (Rotary Tool Center Point Control) function, reducing repeated clamping errors and achieving a position accuracy of ± 0.003mm.
If you have any parts that need to be processed, please feel free to email us for consultation. We will provide processing solutions and process explanations.
