Drill Carbide Body Support Element Vibration Damping
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Solution Overview
Problem
Drills with hard metal bodies used for rock and masonry have a shorter service life when equipped with central suction holes, despite improved dust removal, due to increased vulnerability to vibrations and resonance oscillations.
Innovation Solution
A support element made of steel, designed to bridge the hard metal body at the suction hole, absorbs central impacts and distributes loads, reducing vibrations and resonance through its lower hardness and resilience, and a soldered connection enhances this support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a central suction hole is added to the drill, then dust removal performance is improved, but service life is reduced due to increased vibrations and resonance oscillations
Solution Approach 1:
A support element is introduced as an intermediary component between the hard metal body and the drill head. This support element absorbs central impacts and reduces vibrations transmitted to the hard metal body, thereby protecting it from resonance oscillations while maintaining the central suction hole for dust removal
Solution Approach 2:
The support element is positioned in advance to cushion and absorb central impacts before they reach the hard metal body. This preemptive cushioning prevents the transmission of harmful vibrations and resonance oscillations that would otherwise reduce service life
2Reliability
If the hard metal body is supported centrally by a steel support element, then vibrations and resonance oscillations are reduced, but the structural integrity may be compromised due to lower hardness of the support element
Solution Approach 1:
The drill assembly becomes a composite structure combining the steel support element with the hard metal body. The steel support element provides vibration damping and impact absorption, while the hard metal body maintains cutting hardness and strength, creating a synergistic composite system
3Strength
If the hard metal body is made more brittle to increase hardness, then cutting performance is improved, but vulnerability to fracture from vibrations increases
Solution Approach 1:
The support element serves as a protective intermediary that filters and dampens vibrations before they reach the brittle hard metal body. This allows the hard metal body to maintain its high hardness and cutting performance while the support element absorbs the harmful vibrational stresses that would cause fracture
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 solution significantly extends the service life of drills by preventing fractures and maintaining suction performance, while reducing stress on the hard metal body and improving airflow efficiency.
Implementation Method 1
the support element apparently prevents vibrations and resonance oscillations in the hard metal body
Implementation Method 2
Due to the different material properties between the support element and the hard metal body, resonances are reduced
Implementation Method 3
particularly when there is an additional soldered connection between the support element and the hard metal body
Implementation Method 4
This brazed connection centrally absorbs the central impacts that are exerted by the impact of the drill on the central tip and the main cutting edge of the carbide body
Implementation Method 5
a central suction hole which is connected to a vacuum source. With these drills, the resulting drilling dust should be removed through the drill
Data Source
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AI summary
The invention relates to a drill (10) with a carbide body (14) which is inserted in at least one groove (24) of a drill head (12), which groove is open towards the drill tip, which groove is filled by at least a part of the carbide body and in particular guides the carbide body via a solder connection, wherein the carbide body is supported at least indirectly at the bottom of the groove (26), optionally via solder, wherein the drill (10) has a suction bore (16) and a support element (20) for the carbide body (14) extends transversely across the suction bore (16), in particular through the drill head (12), via which support element (20) the carbide body (14) is supported, in particular at the bottom of the groove (26), and/or at the flanks of the groove.