Double-Ended Parting Insert End-Face Locking Against Lateral Shift
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cutting inserts used for parting and grooving operations are prone to lateral movement out of the recess in the tool holder due to vibrations during heavy load operations, especially with large feed and tough work pieces, despite engagement of ridges and grooves on the top and bottom sides.
Innovation Solution
The cutting insert design incorporates grooves on each end face that receive a projection from the insert holder, combined with a ridge at the recess rear stop face to enhance stability, ensuring engagement at the lateral outer ends rather than just the center, thereby preventing lateral movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the width of the cutting insert is kept as small as possible to avoid heavy loads and material waste, then material removal efficiency is improved, but the stability and fixation options of the cutting insert are limited
Solution Approach 1:
The patent adds engagement features (projections and recesses) on the end faces of the cutting insert, which are perpendicular to the top and bottom sides. This introduces a new dimensional aspect for stabilization without increasing the insert's width, allowing the narrow insert to maintain both high productivity and improved stability through three-point engagement with the holder.
2Stability of the object's composition
If engagement features are added on the end faces of the cutting insert, then lateral movement is prevented, but the device complexity increases
Solution Approach 1:
The engagement system is segmented into two independent components: projections on the end faces of the cutting insert and corresponding recesses in the holder. This segmentation allows each component to be designed and manufactured separately, simplifying the overall system while achieving stable engagement. The modular approach prevents lateral movement without requiring a completely complex integrated structure.
3Length of moving object
If the blade thickness is slightly smaller than the cutting edge extension to allow deep cutting, then cutting depth capability is improved, but the lateral support for the cutting insert is reduced
Solution Approach 1:
The patent compensates for reduced lateral support from the thin blade by introducing engagement features on the end faces (a different dimension perpendicular to the blade thickness). The projections and recesses create lateral constraints through engagement in the depth direction, allowing the blade to remain thin for deep cutting capability while maintaining lateral stability through the additional dimensional engagement.
Data Source
Figure 1~3
Figure 4~7
Figure 8a~8d
AI summary
The present invention is related to a double ended cutting insert (10) designed for parting and grooving, having the basic shape of an elongated cuboid body comprising a top side (1), a bottom side (2), two oppositely arranged side faces (3) connecting the left and right edges, respectively, of the top and bottom sides, and two oppositely arranged end faces (5) connecting the top (1) and bottom sides (2) as well as the side faces (3), wherein main cutting edges (6) are formed at the transition from each of the end faces(5) to the top side (1) and/or the bottom side (2) wherein a relief surface (7) is formed on the end faces (5) adjacent each cutting edge (6). In order to reduce the risk of such cutting inserts to be laterally moved out of a corresponding recess in the blade of a tool holder the cutting insert is characterized in that each end face of the insert is provided with a groove (8) extending from the relief surface (7) towards the bottom side (2) and adapted to receive a correspondingly shaped projection of an insert holder (20).