Drill Feed Aid With Progressive Spring Feedback at Breakthrough
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Drilling through multiple plates or a single plate often results in excessive force being applied, leading to material chipping or tearing, particularly at the end of the drilling operation when the drill bit reaches the end of the plate.
Innovation Solution
A drilling aid system mounted on a drill, comprising a body with a cavity, a rotating shaft, a slider, a collar, and two compression springs of different stiffness, which allows the user to detect the end of the drilling operation by varying resistance, prompting a reduction in applied force to avoid material damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the user applies sufficient force to drill through multiple plates, then the drilling operation can be completed, but excessive force causes material chipping or tearing at the end of the drilling operation
Solution Approach 1:
The system uses two compression springs with different stiffness values to create a progressive resistance feedback mechanism. As the drill bit approaches the end of the plate, the slider moves relative to the body, compressing the first spring and then the second spring with higher stiffness, providing tactile feedback to the user to reduce applied force and prevent material damage
Solution Approach 2:
The system transforms the static drilling force application into a dynamic process with varying resistance. The collar position can be adjusted to modify the compression distance of the springs, allowing the resistance characteristics to be dynamically adapted to different plate thicknesses and material types, optimizing both productivity and surface quality
2Manufacturing precision
If the user applies steady force to avoid material chipping, then material surface quality is maintained, but the drilling operation becomes slower and less efficient
Solution Approach 1:
The progressive spring resistance system provides real-time feedback through varying tactile resistance, enabling the user to maintain optimal drilling speed while automatically adjusting force application to prevent material damage. The system guides the user through the drilling process without requiring constant manual force modulation
Solution Approach 2:
The system changes the resistance parameter during the drilling operation through the progressive compression of springs with different stiffness values. This parameter change occurs automatically based on the drill bit position, allowing the user to maintain higher overall drilling speed while the system ensures proper force control at critical moments
3Productivity
If the force is increased to drill through the first plate quickly, then productivity improves, but the second plate experiences large force that can chip its surface
Solution Approach 1:
The system provides progressive resistance feedback that becomes increasingly significant as the drill bit approaches completion. The first spring absorbs initial compression, allowing fast drilling through the first plate, while the second spring with higher stiffness engages later to provide the necessary force limitation when drilling through the second plate, preventing surface chipping
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
The system effectively limits the force applied by the user at the end of the drilling operation, preventing material chipping or tearing by providing a clear indication of when to reduce pressure, thus ensuring a smooth completion of the drilling process.
Implementation Method 1
a first compression spring having a first stiffness and arranged in the first cavity and pressing, on one hand, against the collar and, on the other hand, against the proximal end of the slider
Implementation Method 2
a second compression spring having a second stiffness greater than the first stiffness, arranged in the first cavity and pressing, on one hand, against the collar and, on the other hand, against the proximal end of the body
Data Source
AI summary
A drilling aid system which comprises a body with a first cavity, a shaft mounted to be able to rotate within the first cavity, a slider which has a proximal end mounted to be able to move in translation within the first cavity, where the slider has a second cavity which extends the first cavity, a collar that is able to move in translation on the shaft, a first compression spring having a first stiffness and pressing against the collar and against the proximal end of the slider, and a second compression spring having a second stiffness greater than the first stiffness, and pressing against the collar and against the proximal end of the body. A system of this kind makes it possible to make the user perceive that the end of the drilling operation is nigh and that therefore the force applied to the drill should be reduced.