Reaming Tool Fine Adjustment Mechanism with Cylindrical Guide
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Solution Overview
Problem
Reaming tools with exchangeable cutting inserts face challenges in high-precision radial fine setting due to elastic yielding of conical setting screws and temperature-induced softening of soldered inserts, which affects the position of cutting inserts during coating processes.
Innovation Solution
The conical portion of the setting screw is guided by two cylindrical guide portions along the screw axis, ensuring precise radial fine setting without elastic impairment, and the guide bores in the main tool body provide a sliding fit without play, allowing high-precision adjustment of cutting inserts with a conical portion directly connected to the inserts for radial displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conical setting screw is used for radial fine setting of cutting inserts, then the cutting insert can be displaced radially for fine setting, but elastic yielding of the conical portion impairs the precision of fine setting
Solution Approach 1:
The setting screw is segmented into distinct functional portions: a conical portion for radial displacement action, and two cylindrical guide portions for precise axial guidance. This segmentation allows each portion to perform its specific function optimally without interference, preventing elastic yielding from compromising precision.
Solution Approach 2:
The cylindrical guide portions act as intermediaries between the conical portion and the cutting insert. They provide a stable, non-yielding guidance path that mediates the force transmission from the conical portion to the cutting insert, ensuring that elastic deformation does not affect the final positioning accuracy.
2Duration of action of stationary object
If soldered cutting inserts are used to improve service life, then surface hardness is increased through coating, but high temperatures during coating cause solder softening and change in position of cutting inserts
Solution Approach 1:
The setting mechanism is segmented with the conical portion directly connected to the cutting insert, allowing precise positioning to be established before coating. This segmentation enables the cutting insert position to be set with high precision independent of the solder joint, which may later deform due to thermal effects during coating.
3Ease of operation
If the conical portion is directly connected to the cutting insert for radial displacement, then fine setting action is achieved, but elastic yielding of the conical portion impairs precision
Solution Approach 1:
The setting screw is divided into a conical portion that directly contacts the cutting insert for radial displacement, and cylindrical guide portions that provide axial guidance. This segmentation allows the conical portion to maintain direct connection for ease of operation while the guide portions prevent elastic yielding from compromising precision.
Solution Approach 2:
Different portions of the setting screw have different geometric qualities optimized for their specific functions: the conical portion provides the necessary radial displacement action through its tapered geometry, while the cylindrical guide portions provide precise axial guidance through their cylindrical shape, ensuring each location has the quality needed for its function.
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 enables high-precision radial fine setting with a radial adjustment range of 0.05 to 0.1 mm per revolution, improving the service life of reaming tools by preventing elastic yielding and maintaining precise positioning of cutting inserts during coating processes.
Implementation Method 1
a conical portion (32) which acts on the cutting insert (12) for fine setting
Implementation Method 2
the guide portions being guided in a sliding manner with a precise fit and without play in said guide bores
Data Source
AI summary
A reaming tool includes a main tool body disposed about a rotational axis, a plurality of peripherally arranged cutting inserts coupled to the tool body, and a fine adjustment mechanism associated with each cutting insert. The adjustment mechanism includes an adjusting screw with a conical section that acts on the cutting insert for fine adjustment, the conical section being arranged between a first and a second cylindrical guide section. The two guide sections ensure high-precision guidance of the adjusting screw.