Drill Body Markings for Depth and Regrind Limit Control
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Solution Overview
Problem
Drills, particularly solid carbide drills, are prone to being driven too deep into the workpiece, leading to unsatisfactory chip evacuation and potential damage due to difficulty in tracking the reduced drill length from abrasion and re-grinding, which affects drilling performance and durability.
Innovation Solution
A drill with markings indicating maximum drilling depth and drill tip abrasion limits, ensuring proper use by aligning with the drill's geometry and design features to prevent excessive depth or re-grinding, thereby maintaining performance and minimizing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the drill is driven deeper into the workpiece to increase productivity, then the drilling depth increases, but chip evacuation becomes unsatisfactory and damage risk increases
Solution Approach 1:
The patent applies preliminary action by providing markings on the drill body before use, which indicate the maximum drilling depth and reconditioning limits in advance. These markings enable operators to plan and control drilling operations to stay within safe parameters, preventing chip evacuation problems and damage before they occur.
2Duration of action of stationary object
If the drill length is reduced by re-grinding the drill tip to extend service life, then the drill can be reconditioned multiple times, but the maximum drilling capability is reduced
Solution Approach 1:
The patent applies preliminary action by providing markings on the drill body before use, which indicate the maximum drilling depth and reconditioning limits in advance. These markings enable operators to plan and control drilling operations to stay within safe parameters, preventing chip evacuation problems and damage before they occur.
Solution Approach 2:
The patent replaces mechanical measurement methods with optical markings. Instead of relying on physical measurement tools or complex calculation systems to determine drill length and capability, simple visual markings provide immediate feedback about the drill's current state and limitations.
3Reliability
If markings are added to indicate drilling depth and reconditioning limits, then proper use can be determined, but the device complexity increases
Solution Approach 1:
The patent applies color changes by using markings with different colors or visual characteristics to indicate different states and limits. This allows operators to quickly distinguish between maximum drilling depth markings and reconditioning limit markings, providing reliable information through simple visual differentiation rather than complex systems.
Data Source
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AI summary
The present invention relates to a drill (1) comprising a front end (2) with a drill tip, an opposite rear end (3), a shank portion (4), a drill body portion (5) and at least one flute (6). The drill further comprises at least one marking (7a-b) arranged at a position on the drill body portion enabling determination of whether a condition for proper use of the drill is met during a use thereof. The invention also relates to a method for producing as well as use of such a drill.