Cutting Insert Deep Blind Opening Wedge Clamping
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Solution Overview
Problem
Existing cutting tools with open designs for narrow cutting inserts face challenges in achieving stable clamping and thermal isolation, leading to reduced wedge forces and increased heat exposure during machining.
Innovation Solution
A cutting tool design featuring a disc-shaped or blade-shaped insert holder with a resilient and non-resilient jaw configuration, including a deep opening in the insert for a wedge projection, which enhances clamping and thermal isolation by ensuring a longer wedge arrangement and reduced heat exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If an open design insert is used with a flexible jaw externally abutting the root portion, then the insert can be clamped in the pocket, but the wedge arrangement is shorter and performs worse
Solution Approach 1:
Instead of having the flexible jaw externally abut the insert's root portion from the outside, the invention inverts the arrangement by having the wedge projection extend into a deep blind opening within the insert itself. This internal wedge arrangement allows for a longer effective wedge length while maintaining the flexible jaw's clamping function, thereby improving wedge forces without compromising the open design benefit.
2Object-affected harmful factors
If an open design insert with extension is used, then the insert can be secured in the pocket, but thermal isolation is reduced leading to increased heat exposure
Solution Approach 1:
The invention applies the nesting principle by placing the wedge projection inside a deep blind opening within the insert body. This nested configuration creates an internal cavity that provides thermal isolation, protecting the wedge arrangement from direct heat exposure during machining while maintaining the overall compact insert design.
3Reliability
If a deep blind opening is created in the insert, then thermal isolation and wedge arrangement length are improved, but the insert structure becomes more complex
Solution Approach 1:
The invention segments the insert structure by creating a distinct deep blind opening as a separate feature within the insert body. This segmentation allows the wedge projection to be independently positioned and dimensioned within the opening, providing improved clamping stability and thermal isolation while keeping the overall insert design modular and manageable.
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
The design provides improved wedge forces and secure clamping of the cutting insert, enhancing machining performance and stability while minimizing heat exposure through a robust and closed insert configuration.
Implementation Method 1
a resilient jaw located opposite the base jaw and being elastic and flexible relative thereto
Data Source
Figure 1~3
Figure 4~7
Figure 8~12
AI summary
A non-indexable, one-sided cutting insert (18, 118) includes opposite insert side surfaces (20) which define an insert width (IW) therebetween, opposite insert front and rear surfaces (22, 24, 124) which extend between the insert side surfaces (20) and define an insert depth (ID) therebetween and opposite insert top and bottom surfaces (26, 126, 28) which extend between the insert side surfaces (20) and the insert front and rear surfaces (22, 24, 124). The insert top and bottom surfaces (26, 126, 28) define an insert height (IH) therebetween. The insert (18, 118) further includes a main cutting edge (34) formed at an intersection between the insert top and front surfaces (26, 126, 22). A maximum value of the insert width (IW) is smaller than a minimum value of the insert height (IH) and smaller than a minimum value of the insert depth (ID). The insert includes a deep opening (44) which opens out only to the insert bottom surface (28) and defines an opening depth (OD). A depth ratio defined between the opening depth (OD) and the insert height (IH) is greater than 0.3.