Rotary Turning Tool With Chip Chopping for Long Chip Control
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Solution Overview
Problem
Existing turning tools inadequately remove long chips formed during machining of materials like aluminum with low silicon content, leading to inefficient and unreliable chip evacuation, as radial forces and coolant pressure methods fail to effectively break and remove these chips.
Innovation Solution
A turning tool equipped with a chip chopping element that rotates within a recess, featuring cutting edges arranged to guide and cut chips into shorter lengths, preventing chip ball formation and ensuring reliable removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If radial forces are used to remove chips during machining, then chip removal is attempted, but the method is inefficient and does not reliably remove chips from the workpiece surface
Solution Approach 1:
The chip-breaking element divides long continuous chips into shorter segments using multiple cutting edges arranged along its circumference. This segmentation prevents chip clumping and enables reliable removal by breaking the continuous chip structure into manageable pieces that can be evacuated from the machining zone.
Solution Approach 2:
The chip-breaking element rotates together with the cutting tool during machining, creating dynamic relative motion between the cutting edges and the emerging chips. This rotational dynamics ensures continuous chip breaking and prevents chip accumulation, maintaining both efficiency and reliability of chip removal throughout the machining process.
2Productivity
If coolant pressure is used to remove chips, then chip removal is attempted, but long chips cannot break and form chip clumps that cannot be reliably removed
Solution Approach 1:
The chip-breaking element actively segments long continuous chips into shorter pieces through mechanical cutting action. This changes the chip morphology from long continuous forms that clump together to short segmented pieces that can be effectively removed by coolant flow, directly addressing the chip shape problem.
Solution Approach 2:
The chip-breaking element acts as an intermediary between the cutting edge and the chip removal system. It mechanically breaks chips into a morphology suitable for coolant-based removal, bridging the gap between chip generation and effective evacuation by preparing chips in the correct form for coolant transport.
3Reliability
If a chip-breaking element with multiple cutting edges is added to the turning tool, then chip breaking capability is improved, but device complexity increases
Solution Approach 1:
The chip-breaking element is integrated with the cutting tool body, merging the chip breaking function with the existing cutting tool structure. The cutting edges are arranged on the outer circumference of the chip-breaking element which is part of the tool assembly, combining multiple functions in a unified structure rather than separate components.
Solution Approach 2:
The chip-breaking element serves multiple functions: it breaks chips into short segments, prevents chip clumping, and facilitates chip removal. By incorporating these multiple functions into a single rotational element with cutting edges, the design achieves reliable chip breaking without proportionally increasing overall device complexity.
Data Source
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Figure 2
AI summary
A turning tool 0 for machining workpieces, comprising a cutting tool 1 and a chip-chopping element 2, wherein the cutting tool 1 is rotatably arranged along a rotary axis AA with an end section 14 in a recess 24 of the chip-chopping element 2; and wherein the cutting tool 1 comprises at least one cutting edge 11 and at least one chip-guiding element 13; and wherein the at least one chip-guiding element 13 is arranged with an entry section 131 on the at least one cutting edge 11 such that, during the machining of a workpiece, chips enter the entry section 131 from the cutting edge 11 and are guided to an exit section 132 of the chip-guiding element 13 in order to exit at the exit section 132;and wherein - the chip-chopping element 2 comprises at least one cutting edge 21 which is designed to move, during a rotation of the chip-cutting tool 1 relative to the chip-chopping element 2, relative to the exit section 132 of the at least one chip-guiding element 13, and to cut the chips exiting at the exit section 132.;