Rotating Shaft Tool Adjustable Cutting Diameter Spindle Access
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Solution Overview
Problem
Existing rotating shaft tools lack the ability to adjust the cutting diameter effectively while being used in a machine tool spindle, as existing adjustment mechanisms require actuation areas that may not be accessible when the tool is inserted.
Innovation Solution
A rotatable shaft tool design featuring a first shaft part with a cutting head and a second shaft part that can be inserted into a recess, utilizing a conical seat and screw thread connection to adjust the cutting diameter, allowing for rotation relative to each other without requiring inaccessible actuation areas, and incorporating cooling channels for optimal lubrication and cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adjustment means requiring actuation areas are provided on the shaft tool, then the cutting diameter can be adjusted, but the actuation areas are not accessible when the tool is inserted into a spindle
Solution Approach 1:
The patent moves the actuation interface from the lateral surface of the shaft tool to the end face, utilizing a different spatial dimension for access. The actuating tool engages with the end face of the shaft tool to rotate the second shaft part relative to the first, allowing adjustment of the cutting diameter without requiring lateral access that would be blocked when inserted into a spindle.
2Stability of the object's composition
If the second shaft part is tightly clamped in the first shaft part, then structural stability is improved, but the ability to rotate relative to each other for adjustment is reduced
Solution Approach 1:
The patent implements a dynamic system where the degree of clamping can be varied. The conical seat provides a mechanical advantage that allows rotational adjustment when force is applied, while maintaining tight clamping when adjustment is not needed. The actuating tool enables controlled rotation of the second shaft part relative to the first, allowing the system to transition between adjustable and fixed states.
Solution Approach 2:
The conical seat acts as an intermediary mechanism between the two shaft parts. It translates the rotational motion applied by the actuating tool into axial clamping force, enabling both adjustment and stable clamping functions through a single mechanical interface. The conical geometry provides friction-based coupling that allows controlled slippage during adjustment while maintaining firm connection during operation.
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 cutting diameter and force-neutral rotation of shaft parts, allowing for precise adjustment of the cutting head diameter even when mounted in a spindle, while ensuring effective cooling and lubrication of cutting edges.
Implementation Method 1
Depending on the clamping state of the cone seat, a cutting diameter of the first cutting head can be adjusted
Implementation Method 2
a cooling channel is present in the second shaft part, which has an outlet in the area of the second cutting head
Implementation Method 3
ensuring effective cooling and lubrication of cutting edges
Data Source
Figure 1~3
Figure 4
AI summary
The aim of the invention is to provide a shaft tool with an adjustable cutting diameter, which permits improved handling. The invention relates to a rotating shaft tool, in particular a multi-stage reamer, with a first shaft part (2), equipped with a first cutting head (5) comprising e.g. several cutting blades and a recess in the first shaft part, in which a second shaft part (3) is positioned in the axis of the first shaft part, the second shaft part having a second cutting head (21) with e.g. several blades and the diameter of the first cutting head being adjustable. The invention is characterised in that the second shaft can be rotated in the first shaft part and that the rotation of the shaft parts in relation to one another creates a fixed connection between the shaft parts. This permits the connection between the two shaft parts and thus in particular the diameter of the first cutting head to be modified even though the shaft tool is inserted into e.g. a spindle of a machine tool.