Tool Head Coolant Channel Assembly Without Post-Sintering Machining
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Solution Overview
Problem
Conventional methods for manufacturing tool heads of rotary cutting tools require expensive post-sintering machining to create coolant channels, limiting the complexity and efficiency of coolant supply to cutting edges.
Innovation Solution
A method involving forming two parts with corresponding grooves that assemble to create coolant channels in the interface, allowing for non-linear, complex coolant channel configurations without sharp transitions, thereby eliminating the need for expensive post-sintering machining and improving coolant supply to all cutting edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods are used to manufacture tool heads, then the manufacturing process is simple, but expensive post-sintering machining is required to create coolant channels
Solution Approach 1:
The coolant channels are formed in the green body before sintering by creating grooves in the tool head body during the forming stage. This preliminary action eliminates the need for expensive post-sintering machining operations such as electrical discharge machining (EDM), thereby improving productivity while maintaining manufacturing simplicity.
2Device complexity
If conventional machining methods are used to create coolant channels, then the tool head structure is simple, but the coolant channel configuration is limited in complexity
Solution Approach 1:
The method enables creation of coolant channels with non-linear configurations and curved paths by forming grooves that can follow complex trajectories in the green body. This allows coolant to reach all cutting edges effectively, including those in difficult-to-access positions, thereby improving coolant supply versatility without complicating the tool head structure.
3Ease of manufacture
If coolant channels are formed with sharp transitions or edges, then the manufacturing process is simple, but pressure drops occur in the coolant channels
Solution Approach 1:
The method changes the geometric parameters of the coolant channels by forming grooves with optimized profiles that eliminate sharp transitions and edges. The grooves are designed with smooth contours that maintain consistent cross-sections, thereby reducing turbulence and pressure drops in the coolant flow while keeping the manufacturing process simple.
4Manufacturing precision
If post-sintering machining is used to create coolant channels, then the coolant channels have precise dimensions, but the manufacturing cost increases
Solution Approach 1:
The coolant channels are formed in the green body before sintering, allowing the channels to be created with accurate dimensions during the forming stage. The grooves are molded with precise geometries that are maintained through the sintering process, eliminating the need for expensive post-sintering machining operations and thereby reducing manufacturing costs while maintaining dimensional accuracy.
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 enables cost-efficient creation of coolant channels with smooth surfaces, reducing pressure drops and enhancing the performance of the tool head by ensuring effective coolant distribution to all cutting edges without the need for expensive post-sintering machining.
Implementation Method 1
joining the assembled parts in a sintering operation to form the tool head
Data Source
AI summary
A method for manufacturing a tool head includes forming a first and a second part from a powder composition. The first and the second parts include corresponding joining surfaces, and the parts have outer surface portions configured to form portions of a peripheral envelope surface of the tool head. The method further includes forming corresponding grooves in the corresponding joining surfaces, assembling the parts into a shape of a tool head by bringing the joining surfaces into contact to form an interface, so that each pair of corresponding grooves forms a channel extending in the interface, the channel having an inlet opening in a rear end of the tool head and an outlet opening in a front end or in the peripheral envelope surface of the tool head, and joining the assembled parts in a sintering operation to form the tool head.