Cutting Tool Rake Face Segmentation for Laser Machining
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Solution Overview
Problem
Cutting tools with high hardness materials like diamond, processed by laser machining, often have rough surfaces, leading to unstable cutting performance and increased costs due to lengthy polishing or grinding processes.
Innovation Solution
The cutting tool's rake face is divided into regions A and B, where region A is smoothed by machine polishing or grinding, and region B is deepened using laser machining, minimizing the area requiring smoothing and reducing processing time and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the entire rake face is subjected to machine polishing or grinding to smooth the surface, then the surface smoothness is improved, but the processing time increases significantly
Solution Approach 1:
The rake face is divided into two distinct regions: region A (near the cutting edge) that requires smoothing by machine polishing or grinding, and region B (upper portion) that is processed only by laser beams and left unsmoothed. This segmentation allows the time-consuming smoothing operation to be applied only where necessary for cutting performance, rather than to the entire rake face.
Solution Approach 2:
Different surface quality requirements are applied to different regions of the rake face. Region A near the cutting edge is given a smooth finish through machine polishing or grinding to ensure stable cutting performance, while region B in the upper portion maintains a rougher laser-processed surface. This local differentiation of surface quality optimizes both cutting performance and manufacturing efficiency.
2Manufacturing precision
If the entire rake face is subjected to machine polishing or grinding, then the surface smoothness is improved, but the cost increases due to the load on polishing or grinding equipment
Solution Approach 1:
The rake face is segmented into region A requiring smoothing and region B where smoothing is omitted. This reduces the total area subjected to expensive machine polishing or grinding operations, thereby lowering manufacturing costs while maintaining adequate surface quality in the critical cutting region.
Solution Approach 2:
High surface smoothness is applied locally only to region A where it is critical for cutting performance, while region B accepts a rougher surface finish. This localized application of quality measures reduces the overall manufacturing cost by eliminating unnecessary smoothing operations in non-critical areas.
3Productivity
If laser beams are used to process the rake face, then the manufacturing efficiency is improved, but the surface roughness increases leading to unstable cutting performance
Solution Approach 1:
The rake face processing is segmented into two zones: region B processed by laser beams for efficient material removal with acceptable roughness, and region A processed by machine polishing or grinding to achieve the smooth surface required for stable cutting performance. This segmentation allows each method to be used where it is most effective.
Solution Approach 2:
Different surface quality levels are applied to different regions based on functional requirements. Region B (upper portion) has a rougher laser-processed surface that is sufficient for its structural role, while region A (cutting edge area) receives a smooth finish critical for cutting stability. This local quality differentiation resolves the contradiction between manufacturing efficiency and cutting performance.
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
This method stabilizes cutting performance by reducing the area to be polished or ground, minimizing the load on polishing tools and lowering processing costs while maintaining high precision.
Implementation Method 1
operations such as cutting of the material or deepening of the rake face are performed by laser machining during manufacturing of this cutting tool for precision cutting
Implementation Method 2
the surface of the tool, particularly the rake face, has been subjected to machine polishing or grinding to increase the surface smoothness
Data Source
Figure 1~2
Figure 3~4(a)
Figure 4(b)~4(c)
AI summary
A cutting tool includes a portion made of a high hardness material. The portion includes a rake face 4, a flank face 5, and a cutting edge 6. The rake face 4 is divided into a region A along the cutting edge 6 and a region B excluding the region A of the rake face, a surface roughness of the region A is smaller than a surface roughness of the region B, and the region B is deepened with respect to a position of the region A.