Cavitation Jet Guidance for Groove Bottom Surface Processing
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Solution Overview
Problem
Existing cavitation processing methods struggle to effectively process the bottom portion of grooves on workpieces, as the jet flow is not adequately directed to achieve uniform processing across varying groove shapes and sizes.
Innovation Solution
A cavitation processing method and apparatus that utilize a guide member with a rectifying portion and a closing portion to redirect the jet flow, ensuring it collides with the bottom portion of the groove, thereby achieving effective processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional cavitation processing method is used, then the processing can be performed on general surfaces, but the jet flow cannot adequately reach and process the bottom portion of grooves
Solution Approach 1:
A guide member is introduced as an intermediary component between the nozzle and the workpiece. The guide member includes a rectifying portion that receives the jet from the nozzle and a closing portion that directs the jet toward the groove bottom. This intermediary structure enables the jet to reach the groove bottom effectively without requiring direct alignment between the nozzle and the groove, solving the coverage problem while maintaining manageable device complexity.
Solution Approach 2:
The guide member extends in the depth direction (front-rear direction) to create a three-dimensional flow path. The rectifying portion is positioned at the rear and the closing portion at the front, forming a channel that guides the jet along the depth dimension to reach the groove bottom. This dimensional approach allows the jet to access previously unreachable areas without complicating the overall device structure.
2Manufacturing precision
If the jet is directed to collide with the workpiece surface, then cavitation processing can be applied, but the jet flow direction cannot be properly controlled to reach the bottom portion of grooves
Solution Approach 1:
The guide member acts as a flow direction control intermediary. The rectifying portion receives the jet from the nozzle and the closing portion redirects it toward the groove bottom. This intermediary structure automatically controls the jet direction through its geometric configuration, eliminating the need for complex active control systems or precise manual positioning, thus maintaining ease of operation while achieving precise flow direction control.
Solution Approach 2:
The guide member's geometry (rectifying portion and closing portion) is designed to change the jet flow parameters - specifically the flow direction angle and position. By carefully designing the angles and dimensions of the guide portions, the jet is naturally redirected to collide with the groove bottom at the appropriate location, achieving precise control through passive geometric parameters rather than active control mechanisms.
3Adaptability or versatility
If the workpiece has various shapes and sizes including grooves, then adaptability is improved, but conventional methods cannot provide appropriate processing for groove bottom portions
Solution Approach 1:
The guide member is designed as a universal component that can handle various workpiece shapes and sizes. The rectifying portion and closing portion form a adaptable flow channel that can accommodate different groove configurations. This universal design allows the same guide member structure to effectively direct jets for processing various workpiece geometries, including grooves of different dimensions, thereby maintaining processing uniformity across diverse shapes without requiring shape-specific adjustments.
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
The method and apparatus enable efficient cavitation processing on the bottom portion of grooves, applying compressive residual stress and improving surface finish, even on complexly shaped workpieces.
Implementation Method 1
a jet of a fluid containing a cavity (bubble) is caused to collide with the workpiece to process the surface of the workpiece by an impact force when the cavity collapses
Implementation Method 2
a nozzle configured to be immersed in the tank to eject a jet of the processing liquid
Data Source
AI summary
The cavitation processing method, includes: immersing a nozzle that ejects a jet of a processing liquid of cavitation, a workpiece including a groove portion extending in a left-right direction and having edge portions at a front and a rear as viewed from the nozzle, and a guide member including a rectifying portion that flows the jet in a front-rear direction and a closing portion that closes a front end of the rectifying portion in the processing liquid; moving the closing portion to close to a front edge portion; ejecting the jet from the nozzle; and introducing the jet to the rectifying portion from the rear to cause the jet to collide with the closing portion for changing a flow direction of the jet to cause the jet to collide with a bottom portion of the groove portion.