Whirling Tool Internal Fluid Channels
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Solution Overview
Problem
The existing whirling technology in metal-cutting machines faces challenges with inadequate chip removal and insufficient cooling/lubrication, leading to surface scoring and deformation due to chip accumulations, primarily because of inefficient fluid delivery to the cutting process.
Innovation Solution
A whirling apparatus with a housing, gear stage, bearings, and seals, where fluid is directed through rotating and static components to the cutting edges via a non-rotating sliding ring, axial bore, and annular channels, ensuring effective cooling and lubrication while guiding chips outwards, using oil, cutting oil, water, or drilling fluid under pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluid is delivered via fixed pipelines or flexible spiral hoses, then the cutting process can be cooled and lubricated, but chip removal is insufficient and fluid delivery is not precise enough
Solution Approach 1:
The patent utilizes hydraulic principles by channeling pressurized fluid (100-200 bar) through internal passages of the rotating whirling tool assembly. The fluid is delivered directly to the cutting zone through radially oriented channels in the cutting plates, providing precise and effective cooling and lubrication at the point of contact, while the high-pressure fluid stream also facilitates effective chip evacuation.
2Reliability
If a channel or hole is made for fluid delivery, then cooling and lubrication can be provided, but the channel requires enough space and stability under high pressure
Solution Approach 1:
The patent implements nesting by integrating fluid delivery channels directly within the structure of the rotating components. The fluid passages are embedded within the hollow rotor and the cutting plates themselves, allowing the fluid delivery system to be nested within the existing mechanical structure without requiring additional external space. The channels are formed as integral parts of the rotating assembly.
Solution Approach 2:
The patent resolves the space constraint by transitioning from external fluid delivery to internal fluid channels. The fluid is delivered through three-dimensional passages embedded within the rotating components, utilizing the internal volume of the hollow rotor and the thickness of the cutting plates. This dimensional integration eliminates the need for external piping in the cutting zone.
3Manufacturing precision
If high speed tool rotation is used, then fine chips are produced and surface quality is improved, but chip accumulation occurs and insert service life is reduced
Solution Approach 1:
The patent employs high-pressure fluid (100-200 bar) delivered directly to the cutting zone to flush away chips produced during high-speed whirling. The fluid stream removes chips from the cutting area and prevents their accumulation on the workpiece surface and around the cutting inserts, thereby extending insert service life while maintaining the benefits of high-speed cutting for surface quality.
4Productivity
If fluid pressure is increased to 100-200 bar for effective cooling, then chip removal improves, but the channel requires sufficient stability
Solution Approach 1:
The patent segments the fluid delivery system into multiple separate channels distributed within the cutting plates and hollow rotor. Rather than requiring a single large stable channel, the system uses multiple smaller passages that collectively deliver the required fluid volume at high pressure. This segmentation distributes the mechanical stress and enhances overall system stability.
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 configuration enhances productivity by allowing higher speeds and longer insert life, ensuring smooth surface finishes and preventing chip accumulation, thus improving the quality and efficiency of the cutting process.
Implementation Method 1
For cooling and/or lubrication, a fluid is fed directly to the cutting plates
Implementation Method 2
the fluid, coming from the inside, presses outwards. As a result, the chips that are produced inside the workpiece during machining are guided out from the inside to the outside
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a whirling apparatus (1) for a machine tool with a housing, at least one gear stage, bearings and seals, wherein the whirling apparatus (1) has a whirling tool (2) with cutting inserts (3) whose active cutting edges (4) are directed radially inwards for the external machining of a semi-finished product (21), preferably a cylindrical semi-finished product (21), wherein a fluid for cooling and/or lubrication is supplied to the cutting inserts (3), wherein the fluid is guided into the whirling tool (2) and from there to the cutting inserts (3) via rotating and static components of the whirling apparatus (1). The invention also relates to a tool holder and a device for conveying a fluid.