Multi-Tool Holder Layout for Straight Turning of Slender Workpieces
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Solution Overview
Problem
Existing tool holders for machining elongate metal parts, such as thin plugs or contact pins, face challenges in maintaining surface quality and preventing bending during the turning process due to lateral pressure from cutting tools.
Innovation Solution
A tool holder design featuring two or more offset plug-in mounts with cutting tools, each secured via a separate retaining means, allowing for simultaneous machining without lateral forces on the workpiece, as the cutting tools are symmetrically supported and positioned to avoid bending stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single cutting tool is used for turning elongate workpieces, then the machining process is simple, but lateral pressure causes bending and poor surface quality
Solution Approach 1:
The invention divides the cutting operation into multiple independent cutting tools arranged circumferentially on the retaining component. Each cutting tool operates independently on different sides of the workpiece, eliminating the need for a single tool to apply excessive lateral pressure. The segmentation of cutting functions across multiple tools maintains operational simplicity while dramatically improving precision and surface quality.
2Manufacturing precision
If multiple cutting tools are used to machine elongate workpieces, then surface quality and precision improve, but the device complexity increases
Solution Approach 1:
The invention merges multiple cutting tools onto a single rotating retaining component that is integrated with the tool holder. Instead of using separate tool holders for each cutting tool, all cutting tools are combined on one component that rotates together, simplifying the overall device structure while maintaining the precision benefits of multiple cutting tools.
Solution Approach 2:
The retaining component serves multiple functions: it holds multiple cutting tools, provides rotational motion to all tools simultaneously, and positions each tool precisely relative to the workpiece. This multi-functionality reduces the need for additional components and simplifies the overall device complexity while achieving high manufacturing precision.
3Device complexity
If cutting tools are positioned asymmetrically, then the device structure is simpler, but lateral forces cause workpiece bending
Solution Approach 1:
The invention uses symmetric arrangement of cutting tools circumferentially distributed on the retaining component. This symmetric configuration ensures that cutting forces are evenly distributed around the workpiece, preventing lateral forces that would cause bending. The symmetric design, while slightly more complex than asymmetric arrangements, provides the necessary stability and workpiece straightness.
Data Source
AI summary
A tool holder for a machine tool, having a retaining component which can be rotated about an axis of rotation and on which a cutting tool is or can be fastened in a releasable manner, wherein the retaining component has at least two plug-in mounts, which are offset in the circumferential direction about the axis of rotation and are intended for receiving a respective cutting tool, having an elongate plug-in shank and a cutting portion, wherein each cutting tool is or can be fixed in the plug-in mount via a separate retaining device, and wherein the cutting tools delimit between them a receiving space for a workpiece which can be machined by the cutting tools together, the cutting tools having their cutting portions facing toward the receiving space.