Drill Head Chisel Edge Layout for Reinforced Concrete Removal
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Solution Overview
Problem
Existing drilling technologies face challenges in efficiently breaking down mineral building materials, particularly reinforced concrete, due to limitations in effectively engaging and removing reinforcement steel.
Innovation Solution
The drilling head features a design with primary and secondary chisel edges on each arm, where the primary chisel edge initiates cutting and the secondary chisel edge completes the removal of steel reinforcement, optimized by a low angle between the edges and a staggered engagement to enhance metal removal efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a drill head with only primary chisel edges is used for percussive extraction, then mineral material can be broken down, but steel reinforcement cannot be effectively engaged and removed
Solution Approach 1:
The chisel edge is segmented into two distinct functional parts: a primary chisel edge for initial material engagement and breaking, and a secondary chisel edge for capturing and removing metal chips. This segmentation allows each part to be optimized for its specific function, enabling effective steel reinforcement removal while maintaining a relatively simple overall drill head structure.
2Productivity
If the secondary chisel edge is positioned too far from the primary chisel edge, then it cannot capture metal chips effectively, but if positioned too close, then it interferes with the primary cutting action
Solution Approach 1:
The invention optimizes the spatial parameters of the chisel edges, specifically setting the angular separation between primary and secondary chisel edges to less than 8 degrees and positioning the secondary edge offset in the direction of rotation. These parameter changes enable the secondary edge to effectively capture metal chips without interfering with the primary cutting action, balancing chip capture efficiency with cutting performance.
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 significantly improves the drilling head's ability to break down reinforced concrete by ensuring continuous cutting and efficient removal of steel reinforcement, enhancing the drilling process's effectiveness and longevity.
Implementation Method 1
During percussive mining, the secondary chisel edge comes into contact with the material somewhat later than the primary chisel edge. The primary chisel edge begins to shear off a portion of the reinforcement
Implementation Method 2
The primary chisel edge begins to shear off a portion of the reinforcement, which the secondary chisel edge can then bend
Data Source
Figure 1~2
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Figure 5~6
AI summary
The invention relates to a drill head (2) for a drill (1), which drill head has a top face (9) for removing mineral material, a bottom face (10) for fastening to a shaft (3) of the drill (1), and an axis of rotation (6), which extends centrally through the top face (9) and the bottom face (10). The drill head (2) has arms (15), which each have a proximal end (18) relative to the axis of rotation (6) and a distal end (19) relative to the axis of rotation (6), wherein the upper faces (9) of the arms (15) each have primary chisel edges (13) extending in the direction from the proximal end (18) to the distal end (19). At least one, preferably at least two, of the arms (15) have a secondary chisel edge (27) extending along the primary chisel edge (13) on the top face (9).