Interchangeable Reaming Head Thickness Optimization
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Solution Overview
Problem
Existing machine reaming tools face challenges in material efficiency and design complexity, particularly with the need for thick guide portions and complex fastening mechanisms that compromise manufacturing accuracy and cost-effectiveness.
Innovation Solution
A machine reaming tool with a one-piece, interchangeable head of reduced thickness, utilizing a conical socket and projection for secure attachment to the shaft without an axially projecting lug, allowing for material-saving manufacturing and simplified design, and enabling efficient torque transmission with a frictional connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick guide portion is used to ensure reliable guiding in all machining conditions, then guiding reliability is improved, but material consumption increases and manufacturing cost increases
Solution Approach 1:
The patent changes the geometric parameters of the guide portion, reducing its thickness while maintaining guiding reliability through optimized dimensions. The guide portion thickness is specifically designed within a range (e.g., 0.5-2mm) that balances guiding function with material efficiency, resolving the contradiction between reliability and material consumption.
Solution Approach 2:
The patent applies guide portions selectively - not the entire tool has uniform thickness. The guide portion is localized and optimized for its specific function, while other parts of the tool head can be thinner. This partial application of the guiding function reduces overall material consumption while maintaining reliability where needed.
2Reliability
If a complex fastening mechanism with axially projecting lug is used to secure the interchangeable head, then connection reliability is improved, but device complexity increases and manufacturing precision requirements increase
Solution Approach 1:
The patent extracts the axially projecting lug from the interchangeable head design, eliminating this complex fastening element. Instead, the connection is achieved through a simplified interface between the shaft and tool holder, reducing device complexity while maintaining connection reliability through precise mating surfaces and frictional engagement.
Solution Approach 2:
Instead of having the interchangeable head project axially with a lug to engage the shaft, the patent inverts the approach: the shaft or tool holder provides the engagement feature, and the interchangeable head connects through a recessed or flush interface. This inversion simplifies the interchangeable head design and reduces manufacturing complexity.
3Loss of substance
If thin interchangeable heads are used to reduce material consumption, then material efficiency is improved, but manufacturing accuracy becomes more difficult to achieve
Solution Approach 1:
The patent optimizes the thickness parameter of the interchangeable head within a specific range that allows both material efficiency and manufacturability. By setting the thickness to values like 0.5-2mm (depending on tool diameter), the design achieves thin-profile benefits while remaining within manufacturing capabilities for achieving required precision.
Solution Approach 2:
The patent applies different quality requirements to different parts of the thin interchangeable head. Critical surfaces (cutting edges, guiding surfaces) receive higher precision treatment, while non-critical areas can be manufactured with standard tolerances. This localized quality approach enables thin design without compromising overall manufacturing accuracy.
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 achieves greater manufacturing accuracy, reduced material requirements, and cost-effective production while maintaining sufficient torque transmission and guiding capabilities for precision machining.
Implementation Method 1
a frictional connection
Data Source
AI summary
A machine reaming tool includes a reaming head or interchangeable head (1) and a shaft (2), wherein the interchangeable head (1) is of one piece and may be exchanged, and in an axial direction and at each location, thus including means for the exchange adaptation, is thinner than a maximal thickness hmax, wherein this maximal thickness hmax is computed in millimeters from a diameter D1 of the interchangeable head in millimeters as hmax=6 mm+(1/10)·(D1−12 mm). On account of this, a guide portion (18) for cutters of the reaming head (1) becomes very much shorter than usual, but despite this ensures an adequate quality of machining. In a preferred embodiment of the invention, the interchangeable head (1) in a plane shaft-side end-face (15) comprises cutout (11) for the centering fastening on the shaft (2).