Single-Lip Drill Guide Bar Layout for Higher Coolant Flow
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Solution Overview
Problem
Conventional single-lip drills face challenges in efficiently supplying cooling lubricant to small bore diameters, leading to reduced drilling depth, increased flow resistance, and higher production costs due to the need for multiple small cooling lubricant channels.
Innovation Solution
The design features a single-lip drill with non-rectangular indentations for guide bars, allowing for a larger diameter cooling lubricant channel, which increases the volume flow and reduces manufacturing costs by minimizing space requirements and flow resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple small cooling lubricant channels are used in small bore diameters, then the space for guide bars and insert mounting is sufficient, but the flow resistance increases and drilling depth is reduced
Solution Approach 1:
The cooling lubricant supply is segmented into two parallel channels with relatively small diameters, allowing the cooling lubricant to be distributed through multiple paths rather than a single large channel, which reduces the notching effect on the drill head stability while maintaining adequate flow capacity
Solution Approach 2:
The two parallel cooling lubricant channels are merged into a common cooling lubricant groove on the outside of the drill head, combining the flow paths to achieve a large effective flow cross-section while minimizing the individual channel diameters to reduce notching effects
2Quantity of substance
If a large diameter cooling lubricant channel is used, then the volume flow increases and drilling depth is extended, but the space for guide bars and insert mounting is reduced
Solution Approach 1:
The cooling lubricant delivery system is extended into a third dimension by forming a groove on the outside surface of the drill head, allowing the cooling lubricant channels to utilize the outer dimensional space rather than consuming valuable internal space that is needed for guide bar and insert mounting
3Area of stationary object
If two parallel cooling lubricant channels with small diameter are used, then the space for guide bars is sufficient, but the production cost increases due to complex manufacturing
Solution Approach 1:
The two parallel cooling lubricant channels are merged into a single external groove structure, simplifying the manufacturing process by reducing the number of separate drilling operations needed while maintaining the space-saving benefits of multiple small-diameter flow paths
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 design enhances cooling and lubrication, extends drilling depth, improves chip removal, and increases the service life and reliability of the drill, while being more cost-effective and stable, particularly beneficial for small bore diameters.
Implementation Method 1
a channel for cooling lubricant is provided. Pressurized cooling lubricant is conveyed through this channel from the clamping to the tip of the single-lip drill
Implementation Method 2
It cools the drill edge and lubricates the guide bars
Implementation Method 3
It cools the drill edge and lubricates the guide bars
Implementation Method 4
The cooling lubricant flows through a flute back to the clamping of the drill. In this process, the cooling lubricant transports the chips generated by the cutting edge out of the bore
Data Source
AI summary
A single-lip drill with interchangeable guide bars is provided, which is particularly suitable for making small bores. Formed in the single-lip drill is a cooling lubricant channel with an enlarged diameter.