Rotary Lance Nozzle Section for Deburring Transverse Bores
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Solution Overview
Problem
Conventional rotary lances are inadequate for effective deburring and cleaning of workpieces with transverse bores and openings due to insufficient deburring effect, particularly when burrs form at cross-holes or other intersections, as they often fail to remove burrs completely or partially, leading to later detachment.
Innovation Solution
The rotary lance features a nozzle section with a combination of forward and backward nozzles, tangentially directed nozzles, and a storage space, allowing for a high-pressure fluid jet to be directed at burrs from favorable angles, ensuring effective removal by hitting the burr's side surface and compensating for transverse forces, thereby enhancing deburring efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If slots are provided in the wall of the rotary lance extending over the entire circumference, then the lance structure is simple, but the deburring effect is insufficient
Solution Approach 1:
The lance structure is segmented into a base body and a separate nozzle section that can rotate independently. The nozzle section contains multiple nozzles arranged at specific angles (including tangential, forward, and backward directions) rather than simple slots in the wall. This segmentation allows the deburring function to be enhanced through multi-directional jet application while maintaining structural simplicity through modular design.
Solution Approach 2:
The invention adds angular/directional dimension to the deburring process by arranging nozzles in multiple orientations (tangential, forward, backward) around the lance axis. This multi-dimensional nozzle arrangement enables the fluid jet to attack burrs from multiple angles simultaneously, significantly improving the deburring effect compared to simple circumferential slots.
2Manufacturing precision
If multiple nozzles are added to improve deburring effect, then the cleaning performance is enhanced, but the device complexity increases
Solution Approach 1:
Multiple nozzles with different orientations (tangential, forward, backward) are merged into a single integrated nozzle section that rotates as one unit. This combining of multiple nozzle functions into a single rotating assembly reduces the overall device complexity compared to having separate fixed nozzle assemblies for each direction, while still achieving comprehensive multi-angle deburring.
Solution Approach 2:
The nozzle section is made rotatable relative to the base body, introducing dynamic capability to the system. This rotation allows a limited number of nozzles to cover multiple angular positions during operation, achieving the effect of many nozzles with fewer physical components. The dynamic rotation simplifies the overall structure compared to having all nozzles fixed in different positions.
3Force
If high-pressure fluid jet is used to remove burrs, then the detachment force is sufficient, but transverse forces cause unwanted deflection
Solution Approach 1:
The invention uses backward-directed nozzles to counterbalance the transverse forces generated by forward and tangential nozzles. The reaction forces from the backward jets act in opposition to the deflection-causing forces, stabilizing the lance during operation. This counterbalancing approach allows high-pressure jets to be used effectively without excessive deflection.
Solution Approach 2:
The nozzle arrangement uses asymmetric angular distribution with specific consideration of force balance. By strategically positioning nozzles at different angles and orientations, the design achieves both effective burr removal and force equilibrium, preventing unwanted lance deflection while maintaining high detachment force on burrs.
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 lance achieves improved deburring and cleaning by ensuring that burrs are hit at optimal angles with high-pressure jets, providing a large detachment force and reducing unwanted deflection, resulting in efficient removal of burrs from workpieces, even in complex geometries.
Implementation Method 1
a burr that is to be at least partially removed can be hit at a favorable angle with a fluid flow, with the momentum of the flow being sufficient to separate the burr from the workpiece
Implementation Method 2
A medium under high pressure can advantageously form a fluid flow according to the invention, the medium being under a pressure of more than 30 MPa (300 bar), for example
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a lance (1) that serves in particular as a rotational lance for deburring and/or cleaning work pieces, having a nozzle section (7) and a line (17) led to the nozzle section (7) via which a medium under high pressure can be conducted to the nozzle section (7). There are a plurality of nozzles (18, 19, 30, 31) on the nozzle section (7) via which the medium conducted to the nozzle section (7) is output in a jet.