Drill Bit Assembly Slant Face Fluid Redirection
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Solution Overview
Problem
Current percussion boring systems are tedious to calibrate and require time-consuming modifications to switch from pilot-boring to product-pulling configurations, leading to inefficiencies and increased costs.
Innovation Solution
A drill bit assembly with a slant face and at least thirteen splines for precise alignment, and a product engagement member that allows for fluid stream redirection, enabling efficient conversion between boring and pulling configurations without replacing the drill bit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If current percussion boring systems are used for calibration and configuration switching, then the system can perform pilot-boring and product-pulling functions, but the calibration process is tedious and time-consuming, and modifying the system requires replacing the drill bit with a back reamer
Solution Approach 1:
The system incorporates self-aligning features where the drill bit assembly automatically calibrates to the predetermined path using alignment references on the substrate surface, eliminating the need for manual calibration procedures and reducing setup time
Solution Approach 2:
The drill bit assembly is designed with a universal interface that allows it to perform multiple functions including pilot-boring, product-pulling, and self-calibration without requiring replacement with different tools, thereby eliminating the need for configuration switching
2Productivity
If the drill bit is replaced with a back reamer to pull product through the bore, then the product can be pulled into place, but the modification process is time-consuming and expensive
Solution Approach 1:
The drill bit assembly incorporates a universal design that enables it to perform both pilot-boring and product-pulling operations without requiring replacement with a back reamer, thereby eliminating modification time and costs while maintaining productivity
Solution Approach 2:
The functionality of the drill bit and back reamer is merged into a single multi-functional assembly that can transition between boring and pulling modes, eliminating the need for tool replacement and reducing overall operation time
Data Source
AI summary
The present disclosure describes various embodiments, as well as features and aspects thereof, of an improved drill bit assembly for a percussion boring system. More specifically, one non-limiting embodiment of an improved drill bit assembly for a percussion boring system comprises a bit and a product engagement member. The bit comprises a slant faced head and at least one exhaust port. The product engagement member comprises a product coupling portion and at least one fluid restriction portion. This improved drill bit assembly is such that, when the product engagement member is detachably engaged with the slant faced head of the bit, a first portion of the fluid stream expelled from the bit is directed substantially forward of the slant faced head and a second portion of the fluid stream is directed substantially rearward from the slant faced head.