Manual tool for removing material from brittle and/or non-ductile stock
AssigneeHilti Aktiengesellschaft
InventorsMaximilian Stock, Josef Obermeier, Eugen Magyari, Peter Ofner
Life of this patent
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Abstract
A manual tool for removing material from brittle and/or non-ductile stock includes a housing (1) with a drive unit (2) for a tool bit (3) located within the housing (1). The tool bit is arranged to be rotated by the drive unit (3) about the bit axis. In addition, an electro-acoustic converter (4) for producing ultrasonic vibrations and a vibration amplifier (5) are positioned within the housing for superimposing ultrasonic vibrations on the rotational action of the tool bit during operation on the manual tool.
Claims25
Manual tool for removing material from brittle or non-ductile stock, comprises a housing (1), a drive unit (2) located within said housing (1), an axially extending tool bit (3) mounted in said housing and rotatable about its axis by said drive unit (2), an electro-acoustic converter (4) and a vibration amplifier (5) located within said housing (1) and arranged for superimposing ultrasonic vibrations on the rotational action of said tool bit (3) ultrasonic vibrations have a frequency and an amplitude defined by the equation:
- 0.5.multidot.V>.omega..multidot.2.multidot.a>5.multidot.V
- wherein the symbol .omega. is the angular frequency, a is the amplitude of the ultrasonic vibration, and V is the cutting velocity of the tool bit (3) in the stock to be removed in meters per second.
Manual tool for removing material from brittle or non-ductile stock, comprises a housing (1), a drive unit (2) located within said housing (1), and an axially extending tool bit (3) mounted in said housing and rotatable about its axis by said drive unit (2), an electro-acoustic converter (4) and a vibration amplifier (5) located within said housing (1) and arranged for superimposing ultrasonic vibrations on the rotational action of said tool bit (3), said electro-acoustic converter (4) being arranged for producing axially directed ultrasonic vibrations (L) having a wave length (.lambda.) in the range of 10 to 40 centimeters and with the ultrasonic vibrations being coupled into the tool bit (3).
Manual tool for removing material from brittle or non-ductile stock, comprises a housing (1), a drive unit (2) located within said housing (1), and an axially extending tool bit (3) mounted in said housing and rotatable about its axis by said drive unit (2), an electro-acoustic converter (4) and a vibration amplifier (5) located within said housing (1) and arranged for superimposing ultrasonic vibrations on the rotational action of said tool bit (3), said electro-acoustic converter (4) is arranged for producing torsional vibrations having a wave-length in the range of approximately 10 to 40 centimeters with said torsional vibrations being coupled into said tool bit (3).
Manual tool for removing material from brittle or non-ductile stock, comprises a housing (1), a drive unit (2) located within said housing (1), and an axially extending tool bit (3) mounted in said housing and rotatable about its axis by said drive unit (2), an electro-acoustic converter (4) and a vibration amplifier (5) located within said housing (1) and arranged for super-imposing ultrasonic vibrations on the rotational action of said tool bit (3), said vibration amplifier (5) having an axial bore (20) with radially extending suction channels (21) open to said axial bore (20) and located in a region of vibration nodes of the ultrasonic waves generated in said manual tool.
Manual tool for removing material from brittle or non-ductile stock, comprises a housing (1), a drive unit (2) located within said housing (1), and an axially extending tool bit (3) mounted in said housing and rotatable about its axis by said drive unit (2), an electro-acoustic converter (4) and a vibration amplifier (5) located within said housing (1) and arranged for super-imposing ultrasonic vibrations on the rotational action of said tool bit (3), a suction module being located upstream of said vibration amplifier (5) and having a length n .lambda./2 where n=1, 2, 3, . . . , and having an axial bore with radial channels at said axial bore being disposed in a region of vibration nodes of the ultrasonic vibrations generated in said manual tool.
Dependencies are inferred from the claim text.