Rotating Nozzle Head for Abrasive Jet Machining
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Solution Overview
Problem
Existing nozzle heads for water-abrasive jet machining lack the capability to significantly enhance material removal and machining efficiency, particularly when dealing with hard materials, as they do not effectively utilize the rotational flow of the fluid and abrasive agent to increase the machining cross-section and surface area.
Innovation Solution
A nozzle head design that includes a drive mechanism allowing it to rotate about a first axis parallel to the feed axis, with a flow guidance element upstream to induce rotation of the fluid, and optionally a second drive for additional rotation about a second axis, along with multiple exit openings that can be angled or inclined to optimize jet direction and machining geometry, utilizing a turbine driven by the fluid flow for a self-sustaining drive system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a flow guidance element is used to induce rotation of the fluid, then the machining cross-section and material removal performance are improved, but the device complexity increases
Solution Approach 1:
The nozzle head rotates about its longitudinal axis using a drive mechanism powered by the fluid flow itself, eliminating the need for external energy sources. The fluid drives a turbine or impeller that converts kinetic energy into rotational motion of the nozzle head, making the system self-sustaining and reducing external complexity.
Solution Approach 2:
The invention adds rotational motion about the longitudinal axis (first axis) to the conventional linear feed motion, creating a compound motion pattern. This additional dimensional movement increases the machining cross-section from a line to a surface area, enabling processing of larger workpiece surfaces simultaneously.
2Area of stationary object
If the nozzle head is made rotatable about an axis parallel to the feed axis, then the machining surface area increases, but the device complexity increases
Solution Approach 1:
The nozzle head is designed with multi-functionality, serving both as a fluid delivery device and as a rotating machining tool. The same nozzle head structure that directs the abrasive jet also performs the rotation about the longitudinal axis, eliminating the need for separate rotating mechanisms and reducing overall device complexity.
Solution Approach 2:
The drive mechanism utilizes the kinetic energy of the fluid flow itself to power the rotation of the nozzle head. A turbine or impeller positioned in the fluid stream converts hydraulic energy into mechanical rotation, eliminating the need for external motors or power sources and simplifying the device architecture.
3Productivity
If multiple exit openings are used to optimize jet direction, then the machining efficiency improves, but the device complexity increases
Solution Approach 1:
The nozzle head incorporates multiple exit openings (first, second, and third nozzles) that segment the fluid flow into multiple directed jets. Each nozzle is positioned and angled to target different areas or aspects of the workpiece, allowing simultaneous multi-point machining that increases overall efficiency and surface coverage.
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
This design enhances material removal performance by increasing the machining cross-section and surface area, improving cutting and drilling efficiency through rotational flow and adaptive nozzle geometry, while eliminating the need for external energy sources by using the fluid flow to power the drive mechanism.
Implementation Method 1
The flow guidance element is designed and arranged in a manner such that it brings the fluid to be discharged into rotation about the longitudinal axis of the flow path
Implementation Method 2
utilizing a turbine driven by the fluid flow for a self-sustaining drive system
Implementation Method 3
the nozzle head itself is brought into rotation about an axis, in particular parallel to the feed axis or in the feed axis
Data Source
AI summary
A nozzle head (1) for discharging a suspension which is under pressure and which includes a fluid and abrasive agent, with at least one nozzle (8) including at least one exit opening (20) for the exit of the suspension. The nozzle head (1) includes at least one first drive device (17′), by way of which the nozzle head can be rotated about a first axis (A1).