Machining Tool Clamping Bushing with Anti-Rotation Conical Surfaces
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Solution Overview
Problem
Existing machining tools face challenges with cumbersome tool changes due to limited accessibility of fastening means, requiring removal and reinstallation of the entire tool, and often necessitate the use of different keys for tightening and loosening, which complicates handling and increases setup times.
Innovation Solution
The design incorporates a clamping bushing with an internal thread and a clamping screw with an external thread, allowing insertion and screwing from both sides, with anti-rotation means such as conical surfaces preventing the clamping bush from rotating, thus enabling the use of a single auxiliary tool and eliminating the need for additional anti-rotation devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the entire tool is removed from the machine tool to change the cutting tool, then the cutting tool can be replaced, but the setup time increases and the process becomes cumbersome
Solution Approach 1:
The tool is segmented into a tool body and an interchangeable cutting tool portion. The fastening means are positioned to allow the cutting tool to be detached and replaced independently while the tool body remains clamped in the machine tool, enabling quick tool changes without removing the entire tool assembly.
Solution Approach 2:
The fastening means act as an intermediary mechanism between the tool body and the cutting tool. By providing accessible fastening means with anti-rotation features, the cutting tool can be quickly secured or released from the tool body without requiring removal of the entire tool from the machine.
2Reliability
If different keys are used for tightening and loosening the fastening element, then the fastening can be secured, but the handling becomes cumbersome
Solution Approach 1:
The fastening element is designed with a universal interface that can be operated with a single auxiliary tool for both tightening and loosening operations. The anti-rotation means provide reliable fastening while the symmetrical design of the fastening element allows the same tool to be used in both directions, simplifying handling.
3Device complexity
If the fastening means are not accessible from both sides, then the structure is simpler, but the accessibility in tight installation situations is limited
Solution Approach 1:
The fastening means are positioned at the front end of the tool body with anti-rotation means that create local accessibility features. The conical surfaces and chamfers are strategically placed to allow tool access from tight spaces, providing localized ease of operation without requiring complex overall structure.
4Reliability
If a separate safety bolt is provided as an anti-rotation device, then the clamping bush can be held against, but the device complexity increases
Solution Approach 1:
The anti-rotation function is merged into the fastening element itself through conical surfaces and chamfers that prevent rotation during tightening and loosening. This integration eliminates the need for separate safety bolts or anti-rotation devices, reducing component count while maintaining reliable anti-rotation security.
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 solution simplifies the handling and replacement process, reduces setup times, and allows for more cost-effective production by eliminating complex support wings, while ensuring secure fastening without the need for separate safety bolts, thus improving accessibility and reducing production costs.
Implementation Method 1
anti-rotation means are formed by a conical surface on the clamping bush and / or a conical surface on the clamping screw head, which at least a part of the tool body bore and/or are adapted to the cutting tool bore
Data Source
Figure 1
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Figure 4~5
AI summary
The present invention relates to a tool for machining a workpiece, having a tool body (12), a cutting tool (16), and attaching means for attaching the cutting tool (16) in a receiving recess of the tool body (12), wherein the cutting tool (16) comprises a cutter (20) and a cutting tool through hole (22), and wherein the tool body (12) comprises a tool body through hole (18) opening into the receiving recess (14). In order to provide simple potential for changing the cutting tool from both sides, depending on accessibility, according to the invention the attaching means comprises a clamping bushing (26) having an internal thread (34) and a clamping screw (24) having an external thread (28) corresponding to the internal thread (34) of the clamping bushing (26), that the clamping screw (24) is either inserted through the cutting tool hole (22) into the tool body hole (18) and screwed to the clamping bushing (26), or inserted from the opposite side through the tool body hole (18) into the cutting tool hole (22) and screwed to the clamping bushing (26), and that anti-twist means are provided, preventing twisting of the clamping bushing (26) about the longitudinal axis thereof when tightening and loosening by means of the clamping screw (24), wherein the anti-twist means are formed by a conical surface (36) on the clamping bushing (26) and/or a conical surface on the clamping screw head (30) adapted to at least one part of the tool body hole (18) and/or the cutting tool hole (22).