Turning Insert Pocket Structure for Multi-Direction Cutting Accuracy
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Solution Overview
Problem
Conventional turning tools have limitations in cutting depth and accuracy, especially when machining complex shapes and require multiple tools for different feed directions, leading to increased insert wear and deformation risks.
Innovation Solution
A turning tool with a pocket design featuring acute-angled side support surfaces and recesses to reduce insert movement and deformation, allowing for greater positional accuracy and use in multiple feed directions, and made from wear-resistant materials like cemented carbide with a tool body of steel, enabling machining of complex shapes with high accuracy and prolonged insert life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the turning insert is made by pressing and sintering without grinding or similar processes, then manufacturing cost and time are reduced, but the insert is more prone to deformation and bending
Solution Approach 1:
The patent applies beforehand cushioning by designing the pocket with recesses that create gaps between the insert side surface and pocket side surfaces. These gaps act as a cushioning mechanism that absorbs and distributes contact pressure, preventing excessive localized stress on the insert. This allows the use of economically manufactured inserts (without time-consuming grinding) while maintaining sufficient positional accuracy and preventing deformation during machining operations.
2Device complexity
If the distance from the cutting edge to the side support surface is increased, then the insert structure is simplified, but the risk of insert bending and cracking increases
Solution Approach 1:
The recesses in the pocket design create gaps that distribute contact pressure along the side support surface. This cushioning effect allows the side support surface to extend further toward the cutting edge (simplifying insert structure) while preventing excessive localized stress that would cause bending or cracking. The gap acts as a pressure-distributing mechanism throughout the contact area.
3Adaptability or versatility
If conventional turning tools are used for multiple feed directions, then tool versatility is improved, but insert wear increases and cutting depth is limited
Solution Approach 1:
The patent applies universality by designing the turning tool with a symmetric pocket configuration featuring recesses on both sides. This allows the same insert to be used effectively in multiple feed directions (longitudinal turning in both directions, facing, and out-facing) without increasing insert wear. The recesses ensure proper support and pressure distribution regardless of the feed direction, enabling the tool to perform multiple functions while maintaining insert durability.
Data Source
AI summary
A turning tool includes a turning insert and a tool body. The turning insert has opposite facing top and bottom surfaces connected by a circumferential side surface. The turning tool has a pocket arranged for receiving the turning insert. The pocket includes a bottom support surface and first and second pocket side surfaces, the first and second pocket side surfaces forming an acute angle. The first pocket side surface includes first and second side support surfaces and the second pocket side surface includes third and fourth side support surfaces. The first recess is formed between the first and second side support surfaces and the second recess is formed between the third and fourth side support surfaces. Each recess forms a gap between the circumferential side surface and the respective pocket side surfaces.