Anchor Bolt Hole Punching Adapter for Consistent Undercut Geometry
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Solution Overview
Problem
Existing methods for punching anchor bolt insertion holes in concrete structures often result in inconsistent cutting angles and sizes due to arbitrary hammer drill tilting, leading to variations in the cross-sectional diameter at the hole bottom, regardless of operator skill level.
Innovation Solution
An apparatus with a hammer drill adapter that allows for adjustable vertical and inclined movements of the drill bit, utilizing a dual-spring mechanism and a spherical inclined driving portion to maintain precise angle and size consistency, ensuring the drill bit can move in a predetermined space and expand the hole diameter at the bottom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the hammer drill is tilted arbitrarily by the operator, then the punching operation can be performed, but the cutting angle and hole size become inconsistent
Solution Approach 1:
The patent introduces a spherical inclined driving portion that changes the motion parameter from purely vertical to include a predetermined inclination angle. This allows the drill bit to move along a controlled inclined path rather than requiring manual tilting by the operator, thereby standardizing the cutting angle while maintaining operational simplicity
Solution Approach 2:
The adapter acts as an intermediary device between the hammer drill and the workpiece. It includes a spherical inclined driving portion that mediates the motion of the drill bit, converting vertical hammer drill motion into inclined punching motion at a predetermined angle, thus eliminating the need for operator tilting while ensuring consistent cutting angles
2Ease of operation
If the hammer drill is tilted arbitrarily by the operator, then the punching operation can be performed, but the hole diameter at the bottom becomes variable
Solution Approach 1:
By introducing the spherical inclined driving portion, the patent changes the motion parameter from uncontrolled manual tilting to a predetermined inclined angle. This standardization ensures that the drill bit maintains a consistent trajectory, resulting in uniform hole diameter at the bottom regardless of operator skill level
Solution Approach 2:
The adapter serves as an intermediary that controls the drill bit's path. The spherical inclined driving portion within the adapter mediates the motion, ensuring the drill bit follows a predetermined inclined trajectory that produces consistent hole dimensions at the bottom
3Manufacturing precision
If the drill bit is constrained to fixed position, then cutting consistency is improved, but the ability to expand hole diameter at bottom is reduced
Solution Approach 1:
The patent employs a dynamic solution with the spherical inclined driving portion that allows controlled movement. The drill bit is not completely fixed but is guided along a predetermined inclined path, enabling it to adapt to the workpiece while maintaining consistent cutting angles and facilitating hole expansion at the bottom
4Manufacturing precision
If a complex adapter structure is used to control drill movement, then punching precision is improved, but device complexity increases
Solution Approach 1:
The patent utilizes a spherical inclined driving portion as the core mechanism. This spherical geometry provides the necessary guidance and movement control in a simple, elegant form. The spherical shape naturally guides the drill bit along the inclined path without requiring complex mechanical linkages, thereby achieving precise hole shaping with relatively simple structure
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 apparatus enables precise and uniform punching of anchor bolt insertion holes with a wider bottom diameter than the entrance, independent of operator skill, by separating the hammer drill's motion into vertical and inclined directions, thus ensuring consistent cutting angles and sizes.
Implementation Method 1
a first spring elastically supporting the intermediate protrusion of the drill bit fixing portion is located on the upper surface of the circular plane forming the lower surface
Implementation Method 2
a second spring is disposed on the inner ring-shaped support portion to elastically support the inclined driving portion
Implementation Method 3
an inclined driving portion having a spherical upper surface with an annular protrusion formed in the center, a vertical walled side surface with the same radius in cross section
Data Source
AI summary
An apparatus for punching an anchor bolt insertion hole is disclosed. The apparatus enables punching work for forming the anchor bolt insertion hole, of which the bottom side is wider than an inlet, on a panel surface for constructing a concrete structure to be performed regardless of the skill of a worker. During operation, the apparatus provides the movement direction of a hammer drill into the vertical direction and the inclination direction so as to enable precise punching work, and doubly arranges springs, which are elastic devices for adjusting the movement range of the hammer drill, so as to uniformly maintain the angle and size for cutting a wall such that a cross-sectional diameter is large at a portion adjacent to the bottom of the anchor bolt insertion hole.