Segmented Drill Ring for Reinforced Concrete

Solution Overview

Problem

Existing drill rings for core drill bits struggle to efficiently process reinforced concrete materials, as they are not designed to handle the varying properties of concrete and embedded rebars simultaneously, leading to suboptimal machining quality.

Innovation Solution

The drill ring is composed of alternating sections with different powder mixtures and diamond particle arrangements, allowing for simultaneous processing of concrete and rebars by optimizing diamond particle distribution and path geometry, with diamond particles arranged in circular tracks to enhance material removal and coolant delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a closed drill ring with randomly distributed diamond particles is used, then the structure is simple and manufacturing is easy, but the machining quality when processing reinforced concrete is suboptimal

Engineering Contradiction:

Improvemachining qualityVSAvoiddiamond particle arrangement

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The drill ring is divided into multiple segments or zones, each with diamond particles arranged in specific circular patterns. This segmentation allows different regions to handle different materials (concrete vs. rebars) independently, improving overall machining quality while maintaining a systematic approach to particle arrangement

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the drill ring are given different diamond particle arrangements and properties. Specifically, diamond particles are arranged in circular patterns with varying diameters and densities in different zones, allowing optimized performance for processing both concrete and embedded rebars simultaneously

Inventive Principle:

Principle #3Local quality

2Manufacturing precision

If diamond particles are arranged in set patterns in layers, then machining quality improves, but the device complexity and manufacturing complexity increase

Engineering Contradiction:

Improvemachining qualityVSAvoidmanufacturing complexity

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

Diamond particles are arranged in circular patterns rather than straight lines or random distributions. The circular arrangement creates continuous cutting paths that improve machining quality while the geometric regularity of circles simplifies the manufacturing process compared to more complex curved patterns

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The invention varies parameters such as circular pattern diameter, diamond particle size, and layer spacing to optimize machining quality. By systematically adjusting these parameters rather than creating entirely complex structures, the manufacturing process remains relatively simple while achieving superior cutting performance

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If the drill ring processes both concrete and rebars, then versatility increases, but the machining quality for each material decreases

Engineering Contradiction:

Improveability to process different substratesVSAvoidmachining quality

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The drill ring is divided into multiple segments or zones, each with diamond particles arranged in specific circular patterns. This segmentation allows different regions to handle different materials (concrete vs. rebars) independently, improving overall machining quality while maintaining a systematic approach to particle arrangement

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the drill ring are given different diamond particle arrangements and properties. Specifically, diamond particles are arranged in circular patterns with varying diameters and densities in different zones, allowing optimized performance for processing both concrete and embedded rebars simultaneously

Inventive Principle:

Principle #3Local quality

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 design improves machining quality and efficiency by increasing the number of removal paths and coolant delivery, effectively processing reinforced concrete materials with enhanced performance and reduced equipment complexity.

Implementation Method 1

The first diamond particles are set on a first number of first removal paths with different first radii of curvature in a plane perpendicular to the cylinder axis. The second diamond particles are set on a second number of second removal paths with different second radii of curvature in a plane perpendicular to the cylinder axis.

Methodology Applied

Scientific EffectAbrasion: Abrasion

Implementation Method 2

the green part is sintered under the influence of temperature and pressure to form a closed drill ring

Methodology Applied

Scientific EffectSintering: Sintering

Data Source

PatentEP3237164B1Drill ring for a core drill bit

Publication Date: 2019.07.03 HILTI AG

Figure 1
Figure 2A
Figure 2B~2C

AI summary

The invention relates to a drill ring (21) for a cylindrical core drill bit, comprising at least two ring segments (22.1, 23.1) which are constructed from a sinterered powder mixture (24, 26) and specifically placed diamond particles (25, 27), said diamond particles (25, 27) being arranged on abrasion paths (42, 43, 44, 45, 46, 47) in a plane perpendicular to the cylinder axis and the ring segments (22.1, 23.1) being connected to each other on their lateral edges.