Core Drill With Integrated Chamfering Blade
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Solution Overview
Problem
Conventional core drills require manual chamfering of large-diameter holes, which is time-consuming and labor-intensive, leading to inefficiencies and increased costs, as they cannot easily form chamfered or countersunk portions at the opening end of cut holes.
Innovation Solution
A core drill design that incorporates a base body with a shank and a drill core body featuring a connection opening portion with a concave portion forming member, allowing for the simultaneous formation of cut holes and concave portions like chamfers or countersinks using large-diameter hole cutting blades, which can be detachably attached to the base body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual chamfering is used to facilitate pipe insertion and bolt installation, then the ease of operation is improved, but the productivity deteriorates due to time-consuming and labor-intensive operations
Solution Approach 1:
The patent combines the drilling operation and chamfering operation into a single integrated tool. The core drill includes both a drill cutting blade for creating the hole and a chamfering blade for forming the chamfered portion, allowing both operations to be performed simultaneously in one step, thereby improving productivity while maintaining ease of operation.
2Manufacturing precision
If manual chamfering is performed by workers using cutting tools, then the manufacturing precision may be improved, but the loss of time increases and productivity deteriorates
Solution Approach 1:
The integrated core drill performs drilling and chamfering in a single operation, eliminating the time loss associated with sequential manual operations while maintaining precision through the designed geometry of the chamfering blade that automatically forms the correct chamfered portion.
Solution Approach 2:
The chamfering blade is positioned and configured in advance on the core drill tool, so that the chamfering action is prepared and executed simultaneously with drilling, rather than requiring separate preparatory or follow-up manual chamfering operations.
3Device complexity
If a simple core drill without integrated chamfering capability is used, then the device complexity is reduced, but the productivity deteriorates due to additional manual operations required
Solution Approach 1:
The patent integrates multiple cutting functions (drilling and chamfering) into a single core drill tool with a unified structure. The tool includes a drill cutting blade and a chamfering blade that work together in one operation, achieving enhanced productivity without proportionally increasing device complexity.
Solution Approach 2:
The core drill is designed as a multi-functional tool that can perform both drilling and chamfering operations. This universality allows a single tool to replace what would otherwise require multiple separate tools or operations, improving productivity while maintaining reasonable device 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 the efficient formation of high-quality chamfered or countersunk portions in a single step, reducing labor and time while improving work efficiency and accuracy by integrating the cutting process into the core drilling operation.
Implementation Method 1
a drill core body (2) including a drill cutting blade (13)
Implementation Method 2
a concave portion forming member (3) including a large-diameter hole cutting blade (15)
Data Source
AI summary
To provide a user-friendly core drill which, when forming a large-diameter cut hole by the core drill with respect to an object to be drilled, such as concrete, is able to easily form, for example, a chamfered portion or a countersunk portion with respect to an opening end portion of the cut hole. In a core drill comprising a base body including a shank and a drill core body including a drill cutting blade, a connection opening portion of the drill core body being attached to the base body, the connection opening portion of the drill core body is provided with a concave portion forming member including a large-diameter hole cutting blade, and the large-diameter hole cutting blade is provided outside the drill cutting blade in a radial direction of the connection opening portion.