Resilient Pick Shank With Longitudinal Slots for Press Fit Mounting
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Solution Overview
Problem
Existing tools used in formation degradation processes, such as asphalt milling and mining, experience wear and require efficient removal and replacement, with existing solutions not adequately addressing the need for secure and resilient mounting.
Innovation Solution
A pick assembly with a shank having a tapered portion and longitudinal slots that allow resilient collapse upon insertion into a bore, maintaining a press fit and incorporating a carbide bolster with a diamond-enhanced tip, and a non-planar interface with voids for stress relief and bonding material control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pick shank is press fitted into a bore for secure mounting, then mounting reliability is improved, but the shank cannot resiliently collapse to accommodate insertion
Solution Approach 1:
The shank is segmented by introducing longitudinal slots that divide the shank structure into sections. These slots allow the shank to resiliently collapse during insertion while maintaining structural integrity for secure press fit mounting. The segmentation enables the shank to deform elastically during insertion and then maintain its press fit condition during operation.
2Ease of operation
If the shank is made resilient to allow collapse upon insertion, then insertion ease is improved, but mounting security may be compromised
Solution Approach 1:
The longitudinal slots are pre-formed in the shank during manufacturing, creating predetermined pathways for elastic deformation. This preliminary action ensures that when insertion force is applied, the shank collapses along these pre-defined slots rather than deforming unpredictably, maintaining both insertion ease and mounting security.
3Duration of action of stationary object
If a non-planar interface with voids is created for stress relief, then durability is improved, but manufacturing complexity increases
Solution Approach 1:
The non-planar interface incorporates controlled voids that create a porous-like structure between the shank and holder. These voids serve as stress relief chambers that prevent stress concentration and cracking, thereby improving durability. The voids are integrated into the bonding interface rather than being separate features, which helps manage manufacturing complexity.
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 secure and efficient mounting of the pick assembly, reducing wear and facilitating quick replacement, while the voids at the interface help in stress relief and bonding, enhancing durability and resilience during operation.
Implementation Method 1
The slot allows the shank to resiliently collapse upon insertion into the bore while still allowing the shank to maintain a press fit while within the bore
Implementation Method 2
a non-planar interface with voids for stress relief and bonding material control
Data Source
AI summary
In one aspect of the invention, a pick assembly comprises a pick shank press fitted within a bore of a pick holder. The pick comprises a pick head opposite the shank. The shank also comprises at least one longitudinal slot extending towards the pick head along the shank from a distal end of the shank. The slot allows the shank to resiliently collapse upon insertion into the bore while still allowing the shank to maintain a press fit while within the bore.