Dual-Spring Drilling Aid for End-of-Hole Force Feedback
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Solution Overview
Problem
Drilling through multiple plates or reaching the end of a single plate often results in excessive force application, risking material chipping or tearing, as the force transmitted through the drill bit is not adequately controlled.
Innovation Solution
A drilling aid system mounted on a drill, featuring a dual-spring mechanism that transitions from a softer compression spring to a stiffer one when the drill nears completion, allowing the user to feel the increased resistance and adjust their force to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the user applies sufficient force to drill through the first plate, then the drilling operation can be completed, but excessive force is transmitted to the second plate causing chipping
Solution Approach 1:
A resilient element (spring) is pre-installed in the drill handle that absorbs and limits the transmission of excessive force to the workpiece. When the drill bit penetrates the first plate and contacts the second plate, the spring compresses to cushion the impact, preventing chipping while still allowing sufficient drilling force to be applied during the main drilling operation.
Solution Approach 2:
The resilient element acts as an intermediary between the user's applied force and the drill bit. It mediates the force transmission by being compressible, allowing force to be transmitted during normal drilling but limiting force transmission when the drill bit contacts the second plate, thus protecting the material from chipping.
2Speed
If the user applies strong force to drill through material quickly, then drilling speed increases, but the risk of tearing or chipping material increases
Solution Approach 1:
The resilient element is pre-installed in the drill handle to absorb and limit the transmission of excessive force to the workpiece. When the drill bit penetrates the first plate and contacts the second plate, the spring compresses to cushion the impact, preventing chipping while still allowing sufficient drilling force to be applied during the main drilling operation.
Solution Approach 2:
The resilient element acts as an intermediary between the user's applied force and the drill bit. It mediates the force transmission by being compressible, allowing force to be transmitted during normal drilling but limiting force transmission when the drill bit contacts the second plate, thus protecting the material from chipping.
3Ease of operation
If no force limitation mechanism is provided, then the drilling operation is simple, but the user cannot intuitively know when to reduce force
Solution Approach 1:
The drill handle incorporates a resilient element that automatically provides force feedback to the user. As the drill bit penetrates the material and approaches completion, the spring compresses and increases resistance, allowing the user to intuitively sense when to reduce applied force without requiring external feedback mechanisms or complex control systems.
Solution Approach 2:
The resilient element provides tactile feedback to the user during the drilling operation. The compression of the spring creates increasing resistance that the user can feel through the drill handle, serving as a natural signal that the drilling is nearing completion and force should be reduced, eliminating the need for complex electronic feedback systems.
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
Enables users to intuitively reduce force application as the drill nears completion, preventing material chipping or tearing by providing a clear tactile cue through the spring mechanism, thus ensuring controlled drilling.
Implementation Method 1
a first compression spring (130) having a first stiffness and which is disposed in the first housing (104) and bears, on the one hand, against the ring (128) and, on the other hand, against the proximal end (112a) of the slide (112); The support system (100) includes a second compression spring (132) with a second stiffness greater than the first stiffness
Data Source
Figure 1
AI summary
The invention relates to a drilling aid system (100) which comprises a body (102) with a first housing (104), a shaft (106) movable in rotation within the first housing (104), a slide (112) which has a proximal end (112a) mounted movable in translation within the first housing (104), where the slide (112) has a second housing (118) which extends the first housing (104), a ring (128) movable in translation on the shaft (106), a first compression spring (130) having a first stiffness bearing against the ring (128) and against the proximal end (112a) of the slide (112), and a second compression spring (132) having a second stiffness greater than the first stiffness and bearing against the ring (128) and against the proximal end (102a) of the body (102).Such a system allows the user to feel that he is nearing the end of the drilling and that he must therefore limit the force he exerts on the drill.