Cover Layer Core Drilling With Dual-Speed Bit and Drill Head
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Solution Overview
Problem
Current methods for drilling a pit in built-up areas require multiple steps, including creating a circular cut and then drilling a bore, which is inefficient and increases surface damage and costs.
Innovation Solution
A surface layer drilling device with a drill bit and a smaller diameter drill head that can be driven at different angular speeds, allowing for simultaneous cutting and reducing the number of steps by combining the circular cut and bore creation processes, with the drill head and bit being movable relative to each other and driven by a rotary drive with planetary gears.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple separate steps are used to create a pit (circular cut then bore drilling), then each step can be optimized independently, but the total process time and surface damage increase
Solution Approach 1:
The patent combines the circular cut and bore drilling operations into a single integrated drilling process. The drill bit with integrated crown drill and inner rod performs both functions simultaneously, eliminating the need for separate operations and reducing total process time while maintaining optimal cutting speeds for both outer and inner diameters.
Solution Approach 2:
The drill bit is segmented into functional components (crown drill for outer diameter, inner rod with drill bit for inner diameter) that can operate at different angular velocities. This segmentation allows each component to be optimized for its specific cutting task while working together in a unified drilling operation.
2Productivity
If a single drill bit is used for both circular cut and bore drilling, then the number of steps is reduced, but optimizing cutting speeds for both operations becomes difficult
Solution Approach 1:
The drilling system incorporates independent rotation drives for the crown drill and inner rod, allowing dynamic adjustment of angular velocities during operation. This enables optimal cutting speeds to be maintained for both the outer circular cut and inner bore drilling simultaneously, even though both operations occur in a single step.
3Manufacturing precision
If separate operations are performed for circular cut and bore drilling, then each operation can be optimized, but surface damage and costs increase
Solution Approach 1:
By merging the circular cut and bore drilling into one operation, the patent minimizes the number of times equipment needs to be positioned and removed from the work area. This reduces surface disruption and damage while maintaining precise control over both cutting operations through the integrated drill bit design.
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
This approach reduces the number of steps required for pit creation, minimizes surface damage, and enhances productivity by optimizing cutting speeds and torques, allowing for more efficient and safer drilling with less consequential surface disruption.
Implementation Method 1
a rotary drive with planetary gears
Data Source
Figure 1
AI summary
The invention relates to a covering layer drilling device, in which a drill head with a smaller diameter than that of the drill bit is arranged in a drill bit and the drill bit and the drill head can be driven at different angular speeds.