Rotatable Diamond Tool Assembly With Restricted Rotation Wear Control
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Solution Overview
Problem
Formation degradation tools, such as drilling and pavement milling equipment, face issues with mechanical component wear due to high impact, heat, and abrasion, leading to reduced service life, with existing solutions focusing on free rotation to promote even wear but lacking in effectively extending the life of the impact tip.
Innovation Solution
A tool assembly with a rotary portion and a stationary portion, where a compressible element, like an o-ring or spring, is used to restrict free rotation during operation, and a bolster and diamond tip combination that is rotationally isolated, allowing manual rotation to distribute wear, enhancing durability and extending the assembly's life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If free rotation is allowed during degradation operation, then even wear is promoted, but the impact tip cannot be manually rotated for wear distribution
Solution Approach 1:
The degradation assembly is divided into a rotary portion (shield with impact tip) and a stationary portion (shank with driver interface), allowing independent treatment of rotation functions. The rotary portion can be manually rotated as a separate unit while the stationary portion remains fixed during operation.
Solution Approach 2:
A compressible element (such as a spring or elastomeric material) is introduced as an intermediary between the rotary and stationary portions. This element restricts free rotation during operation but allows manual rotation when force is applied, serving as a mediator that controls the rotation behavior.
2Reliability
If free rotation is allowed during degradation operation, then even wear is promoted, but control over rotation timing and extent is lost
Solution Approach 1:
The compressible element acts as a controlled intermediary that restricts rotation during operation but permits manual rotation. This provides controlled rotation behavior rather than completely free or completely fixed rotation, allowing operators to control when and how much rotation occurs.
Solution Approach 2:
The rotation characteristic changes dynamically based on operating conditions. During degradation operation, the compressible element restricts rotation to maintain stability. During manual rotation, the element allows rotation to distribute wear. The system transitions between fixed and rotatable states as needed.
3Ease of operation
If the impact tip is rotationally isolated from the driver, then manual rotation is enabled, but free rotation during operation must be restricted
Solution Approach 1:
The assembly is segmented into rotary and stationary portions with distinct functions. The rotary portion (shield with tip) is isolated from the stationary portion (shank with driver), allowing the rotary portion to be manually rotated while the stationary portion maintains operational stability.
Solution Approach 2:
The compressible element serves as an intermediary that provides different rotation characteristics for different operational modes. It restricts rotation during machine operation for stability but allows manual rotation for wear distribution, mediating between the two conflicting requirements.
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 solution significantly extends the life of the degradation assembly by preventing free rotation and allowing controlled manual rotation, resulting in a durable tip and bolster combination that outlasts commercially sold milling teeth by a factor of ten, reducing downtime and inventory needs.
Implementation Method 1
A compressible element is disposed intermediate and in mechanical contact with both the rotary and stationary portions. The compressible element is compressed sufficiently to restrict free rotation during a degradation operation.
Implementation Method 2
Formation degradation tools, such as drilling and pavement milling equipment, face issues with mechanical component wear due to high impact, heat, and abrasion
Implementation Method 3
Formation degradation tools, such as drilling and pavement milling equipment, face issues with mechanical component wear due to high impact, heat, and abrasion
Data Source
AI summary
In one aspect of the present invention, a tool assembly comprises a rotary portion and a stationary portion. The rotary portion comprises a bolster bonded to a diamond symmetric, substantially conically shaped tip. The stationary portion comprises a block mounted to a driving mechanism. A compressible element is disposed intermediate and in mechanical contact with both the rotary and stationary portions. The compressible element is compressed sufficiently to restrict free rotation during a degradation operation.