Drilling Tool Body Coupling for 180° Cutting Edge Alignment
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Solution Overview
Problem
The alignment of peripheral cutting edges in drilling tools used for single-point machining of rotating workpieces is time-consuming and inefficient, especially when changing tools or reversing the transverse feeding direction.
Innovation Solution
A tool body assembly with a drilling tool body featuring a coupling member that allows fastening in one of two rotational positions separated by 180°, ensuring the peripheral cutting edge is always aligned with the transverse feeding direction, facilitated by torque transfer means such as pins and recesses, which prevent axial motion and enable easy tool exchange and reorientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a drilling tool body is mounted in a lathe for single-point machining, then the tool can perform boring and turning operations, but the alignment of the peripheral cutting edge with the transverse feeding direction becomes time-consuming
Solution Approach 1:
The coupling member is designed with asymmetric torque transfer means (pins and recesses) that create a preferred rotational position. The pins in the coupling member engage with corresponding recesses in the tool body, allowing the tool body to be fastened only in specific rotational positions (e.g., 0° or 180°), ensuring the peripheral cutting edge is automatically aligned with the transverse feeding direction when the tool is mounted in the lathe.
2Adaptability or versatility
If the tool body is reoriented to reverse the transverse feeding direction, then machining can proceed in the opposite direction, but the alignment process becomes time-consuming
Solution Approach 1:
The asymmetric torque transfer means with pins and recesses enable the tool body to be fastened in multiple discrete rotational positions (e.g., 0° and 180°). This allows operators to quickly reverse the transverse feeding direction by simply rotating the tool body to the alternative position and fastening it, without requiring time-consuming alignment procedures.
3Adaptability or versatility
If a drilling tool body is used for both drilling and single-point machining operations, then the tool becomes multi-purpose, but the alignment requirements for single-point machining are not met
Solution Approach 1:
The coupling member incorporates asymmetric torque transfer means that mechanically constrain the tool body to specific rotational positions during fastening. This ensures that whether the tool is used for drilling or single-point machining operations, the peripheral cutting edge is automatically positioned with high precision relative to the transverse feeding direction, eliminating alignment errors.
Data Source
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Figure 6a~6c
AI summary
A tool body assembly for use in chip-removing machining of a workpiece, comprising: - a drilling tool body (4) extending along a centre axis (C), wherein a peripheral insert seat (8) and a centre insert seat (9) are provided in a front end (5) of the tool body, - a coupling member (20) having a first end (21) configured for engagement with a rear end (6) of the tool body, and a second end (22) for fastening to a holder of a machine, - a securing member (30) configured to prevent axial motion of the tool body with respect to the coupling member, - torque transfer means (40) configured to transmit torque between the coupling member and the tool body, wherein the torque transfer means are positioned to allow fastening of the tool body to the coupling member in one of totally two available rotational positions, separated by 180°.