Rock Drill Bit Suction Port Geometry for Tip-Edge Cuttings Removal
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Solution Overview
Problem
Existing rock drilling technologies face inefficiencies in removing drill cuttings, particularly due to the limitations of helical shanks and suction bore designs, which affect the performance and effectiveness of rock chiseling operations.
Innovation Solution
A drill design featuring a hollow shank with non-circular suction openings, specifically triangular in shape, and a drill head with inclined suction channels, which enhances suction performance by allowing closer placement of suction openings to the cutting edge, improving the removal of drill cuttings directly at the tip, and utilizing sintered tungsten carbide cutting edges for effective rock chiseling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If circular suction ports are used, then the structural design is simple, but the suction efficiency is reduced because the ports cannot be positioned as close to the tip
Solution Approach 1:
The suction ports are designed with non-circular cross-sections (triangular, rectangular, or other polygonal shapes) instead of conventional circular shapes. This asymmetric geometry allows the ports to be positioned much closer to the cutting tip while maintaining sufficient cross-sectional area for effective cuttings removal, directly resolving the contradiction between structural simplicity and suction efficiency
2Productivity
If suction ports are positioned closer to the tip, then the suction efficiency improves, but the structural design becomes more complex
Solution Approach 1:
By采用 non-circular cross-sections for suction ports, the design achieves closer positioning to the tip without proportionally increasing complexity. The geometric simplicity of regular polygonal shapes (triangles, rectangles) compared to the spatial complexity of achieving the same area with circular ports at equivalent positions makes this an effective resolution
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 design significantly enhances the removal of drill cuttings through improved suction performance and the use of durable, high-performance cutting edges, leading to more efficient rock chiseling and drilling operations.
Implementation Method 1
A suction drill is known from WO 2016 129 268 A1. The drill head has three or more cutting edges and one or more suction ports on one end face. Suction channels are arranged within the drill head, connecting the suction ports to the conveying channel.
Data Source
Figure 1
Figure 2~4
Figure 5~7
AI summary
The drill bit (1) for chiselling rock has an impact face (7) at a plug-in end (6), a hollow shank (4), within which a feed duct (35) is provided, and a drill head (2). The drill head (2) has, on an end face (12), three or more cutting lips (14) and one or more intake openings (3). Arranged within the drill head (2) are intake ducts (30), which connect the intake openings (3) to the feed duct (35). The intake openings (3) have a non-circular cross-section. With an identical cross-sectional area, the non-circular intake openings (3) can be placed closer to the tip (15) than circular intake openings (3). Placing closer to the tip (15) improves the extraction performance, since a major part of the drilled material arises directly at the tip (15).