The ultrasonic cleaning machine is a key device used in the optical glass manufacturing process, ensuring high-quality surface finishes and precision. It plays a vital role in both pre-coating and post-grinding cleaning stages.
**Technical Specifications:**
- **Probe Current Voltage Pin:** 420*4450 head diameter of 5.0, designed for accurate current and voltage pin detection.
- **Single Chip Microcomputer:** STM32L151CCU6, a powerful and energy-efficient microcontroller ideal for industrial applications.
- **Filter:** 18.432M, ensuring stable signal processing and performance.
**Process Flow:**
1. **Cleaning After Grinding**
Grinding is a critical step in optical glass production that affects both efficiency and surface quality. The main contaminants include abrasive powders (often cerium oxide) and asphalt, which protect the polished surface from scratches. Some manufacturers may also use paint pieces during this stage. Different types of grinding powders are selected based on the lens material and required precision. Cleaning after grinding typically uses either organic solvents or semi-aqueous agents to remove these residues effectively.
2. **Cleaning Before Coating**
Before applying the coating, it's essential to remove core oil (also known as grinding oil), fingerprints, dust, and other impurities. Since the coating process demands extreme cleanliness, the choice of cleaning agent is crucial. Not only must the agent be effective at removing contaminants, but it should also minimize corrosion and damage to the lens surface.
**How Ultrasonic Cleaning Works:**
Ultrasonic cleaning is highly efficient and user-friendly. While humans can hear sounds between 20 Hz and 20,000 Hz, frequencies above 20,000 Hz are classified as ultrasonic. These waves travel through liquids in a sinusoidal pattern, creating numerous tiny bubbles. This phenomenon, known as cavitation, occurs due to two main reasons: first, local tensile stress causes a drop in pressure, leading to gas release and bubble formation; second, strong tensile forces split the liquid, forming hollow cavities. These bubbles collapse rapidly, generating powerful scrubbing action that removes contaminants from surfaces without causing damage.
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