Machining Tool Blank Recesses for PCD Fusion
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Solution Overview
Problem
Existing machining tool blanks face challenges in forming effective machining tips and faces using abrasive polycrystalline diamond (PCD) and cubic boron nitride (PCBN) materials, particularly in maintaining structural integrity and production yield during high-pressure, high-temperature processing.
Innovation Solution
The machining tool blanks are designed with strategically formed recesses and geometries that allow for the integration of PCD or PCBN materials through high-pressure and high-temperature sintering, where the blanks are machined to include multiple recesses and angles, enabling the fusion of these abrasive materials directly onto the tool blanks, reducing stress and defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple recesses are formed in the blank during machining, then production yield increases and stress-related defects decrease, but device complexity increases
Solution Approach 1:
The blank is divided into multiple recesses (first recess, second recess, third recess, fourth recess) instead of a single recess, allowing separate filling and sintering of PCD/PCBN materials in different zones. This segmentation enables better stress distribution and reduces defects while maintaining structural integrity during high-pressure high-temperature processing.
Solution Approach 2:
Different recesses are positioned at specific locations on the blank surface to address local stress concentration points. The varying depths and orientations of recesses create localized material distribution that optimizes both structural strength and machining performance in different zones of the final tool.
2Strength
If PCD or PCBN materials are integrated through high-pressure and high-temperature sintering, then machining tip strength and durability improve, but energy consumption increases
Solution Approach 1:
The blank is pre-formed with precisely engineered recesses before the sintering process. This preliminary structuring allows PCD/PCBN materials to be positioned optimally in advance, reducing the need for excessive pressure and temperature during sintering to achieve proper bonding and density, thereby lowering energy consumption while maintaining strength.
3Manufacturing precision
If recesses are formed at specific angles (15-90 degrees) in the blank, then machining precision and tool performance improve, but manufacturing complexity increases
Solution Approach 1:
The recesses are formed with specific angular parameters (15-90 degrees relative to the blank surface) that optimize the final tool geometry. By controlling these angular parameters during the recess formation stage, the patent achieves precise tool angles and geometries without requiring complex post-processing, balancing manufacturing precision with process simplicity.
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 approach results in machining tools with reduced cracking and increased production yield, as evidenced by 60% less stress-related defects compared to blanks with single recess designs, and allows for the formation of tools with specific angles and geometries suited for various applications like twist drills and end mills.
Implementation Method 1
the blanks are machined to include multiple recesses and angles, enabling the fusion of these abrasive materials directly onto the tool blanks through high-pressure and high-temperature sintering
Data Source
AI summary
A blank for use in forming a machining tool having a body with at least one end face and at least two recesses formed in the end face including a first recess wherein the first recess extends from the end face at an angle of about 15° to about 60° and a second recess continuing from the first recess extending from the end face at an angle of about 40° to about 90°.