Wet Blasting Nozzle Control via Liquid Film Thickness
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Solution Overview
Problem
Existing wet blasting treatment devices cannot adjust the machining amount per unit time without increasing introduction and running costs, as they rely on constant air pressure for slurry spraying.
Innovation Solution
A wet blasting treatment device with a first nozzle unit for discharging slurry and a second nozzle unit for forming a liquid film, controlled by a unit to adjust the liquid film's thickness, allowing for variable machining depth and surface roughness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If air pressure is increased to adjust machining amount, then machining depth can be controlled, but introduction cost and running cost increase
Solution Approach 1:
The system divides the liquid delivery into two separate nozzle units: a first nozzle unit for discharging slurry containing abrasive grains, and a second nozzle unit for discharging pure liquid to form a liquid film. This segmentation allows independent control of each function, enabling machining depth adjustment through liquid film thickness control without requiring complex air pressure regulation systems.
Solution Approach 2:
The patent introduces a liquid film as an intermediary medium between the slurry and the workpiece surface. By controlling the thickness of this liquid film through the second nozzle unit, the system achieves control over the collision speed and angle of abrasive grains, thereby controlling machining depth without directly controlling air pressure.
2Manufacturing precision
If air pressure is increased to adjust machining amount, then machining depth can be controlled, but running cost increases
Solution Approach 1:
The patent replaces the mechanical air pressure control system with a hydraulic/liquid-based control system. Instead of using a compressor to vary air pressure, the system uses pumps to deliver liquid through controlled nozzles, creating a liquid film whose thickness can be precisely controlled. This substitution reduces energy consumption as liquid delivery is more efficient than compressed air delivery for this application.
3Device complexity
If constant air pressure is used, then device complexity is reduced, but adaptability to different machining depths is lost
Solution Approach 1:
The system introduces dynamic control capability through the second nozzle unit, which can vary the discharge amount of liquid to form liquid films of different thicknesses. This dynamic adjustment allows the system to adapt to different machining depth requirements while maintaining relatively simple device architecture, as the control is achieved through nozzle discharge regulation rather than complex pressure control systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables adjustable machining depth and surface roughness without increasing costs, by controlling the collision speed and angle of abrasive grains, thus optimizing machining efficiency.
Implementation Method 1
a second nozzle unit that discharges a second liquid toward an adjacent region adjacent to the target treatment region such that a liquid film is formed in the target treatment region
Implementation Method 2
a first nozzle unit that discharges, toward a target treatment region, slurry in which a first liquid and abrasive grains are mixed
Implementation Method 3
slurry in which a first liquid and abrasive grains are mixed
Data Source
AI summary
Provided is a wet blasting treatment device including a first nozzle unit that discharges, toward a target treatment region of a workpiece, slurry in which a first liquid and abrasive grains are mixed, a second nozzle unit that discharges a second liquid toward an untreated region adjacent to the target treatment region such that a liquid film is formed in the target treatment region of the workpiece, and a control unit that controls a discharge amount of the second liquid discharged by the second nozzle unit such that the liquid film has a predetermined thickness.