Modular Tool Head with Sintered Preforms for Complex Cooling Ducts
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Solution Overview
Problem
The production of complex tool heads with integrated cooling lubricant ducts for machine cutting tools is complicated by the need for intricate structures, which are difficult to manufacture using existing methods, especially when dealing with hard materials like hard metal or ceramics.
Innovation Solution
The tool head is fabricated from multiple preforms made from granular materials, which are separately produced and then jointly compressed and sintered to form a complex duct system, allowing for the creation of branched ducts and varied nozzle geometries without increasing production complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex duct structures are produced using traditional methods, then cooling lubricant flow and cutter cooling are improved, but production complexity and manufacturing difficulty increase significantly
Solution Approach 1:
The tool tip is divided into multiple separately produced preforms that are subsequently joined together. This segmentation allows each preform to be manufactured independently using simpler processes, avoiding the need to produce the entire complex duct structure in one piece, thereby reducing overall production complexity while maintaining the required cooling lubricant flow paths
Solution Approach 2:
Core elements are inserted into cavities of preforms during the forming process to create the duct structures. The core elements are nested within the preform cavities, and after sintering, these cores form the internal duct passages. This nesting approach simplifies the production of complex internal geometries compared to traditional single-piece manufacturing methods
2Reliability
If complex inner hollow structures and undercuts are realized in hard material tools, then integrated cooling lubricant supply is improved, but production complexity increases
Solution Approach 1:
The duct structures are prepared in advance by inserting core elements into preform cavities before the final sintering process. This preliminary action allows the complex hollow structures to be formed as part of the green compact, avoiding the need for complex post-processing or specialized machining of hard materials, thereby reducing production complexity
Solution Approach 2:
Core elements are used as intermediary tools to define the duct geometries during the forming process. These removable core elements act as mediators that create the desired hollow structures without requiring direct machining or complex molding of the final hard material, simplifying the manufacturing process
3Ease of manufacture
If rapid prototyping methods are used to produce complex tool tip geometries, then manufacturing capability is improved, but production time increases
Solution Approach 1:
Multiple preforms with different functions (cutting elements, duct structures, support structures) are combined in a single sintering process. This merging approach allows complex geometries to be produced in one batch operation rather than through multiple sequential rapid prototyping steps, significantly reducing production time while maintaining manufacturing capability
4Ease of manufacture
If straight ducts are produced using core elements in pressing molds, then manufacturing simplicity is improved, but duct geometry flexibility is limited
Solution Approach 1:
Different preforms can use different core element configurations tailored to their specific duct requirements. Each preform is optimized locally with appropriate core shapes and positions, allowing a variety of duct geometries (straight, curved, branched) to be produced using the same basic core element technique, thereby maintaining manufacturing simplicity while increasing geometry flexibility
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 simplifies the production of complex tool heads with precise cooling lubricant delivery, enhancing the tool's service life and efficiency by enabling the use of different materials for tailored hardness and toughness in various regions, while maintaining low production complexity.
Implementation Method 1
These preforms are put together and then jointly compressed and are hereupon integrally bonded in a sintering process
Data Source
AI summary
A tool head for use with a modular shank tool includes at least two preforms. Each preform of the at least two preforms is made separately from the other preform of the at least two preforms from granular materials and then put together and jointly compressed and integrally bonded.