Method for operating a machine tool, and machine tool
A processing tool and machining technology, applied in the direction of manufacturing tools, portable motorized devices, wrench, etc., can solve the problems of battery charging level reduction, energy consumption, motor overheating, etc., and achieve the effect of weight optimization, low cost and simple structure
Active Publication Date: 2021-12-17
HILTI AG
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006]
Disadvantageously, the operation of the electric motor in the second operating state is very energy-intensive and leads to a rapid decrease in the charge level of the battery and, if the cooling is insufficient, undesired overheating of the electric motor
Method used
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Embodiment Construction
[0039] figure 1 is an exemplary flowchart of an embodiment of a method according to the invention for operating a machining tool 1 , in particular a cordless screwdriver, a drill or the like. The machining tool 1 has a battery 2 which is provided for powering an electric motor 3 of the machining tool 1 . The electric motor 3 is designed to rotationally drive an output shaft 4 of the machining tool 1 , which may be coupled to a tool 5 , such as a drill bit, a drilling head or the like. The machining tool 1 also has a control device 6 for actuating the electric motor 3 which is designed to actuate the electric motor 3 in a controlled manner based on the amperage. The machining tool 1 also has means 7 for determining parameters of the machining tool 1 , in particular the torque applied to the output shaft 4 and / or the acceleration value of the output shaft 4 . The machining tool 1 is designed without a mechanical coupling so that the electric motor 3 is operatively connected di...
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The invention relates to a method for operating a machine tool comprising a battery and an electric motor which is designed to rotationally drive an output shaft that can be coupled to a tool. A controller for actuating the electric motor and a device for ascertaining a parameter are provided, wherein the machine tool can be operated in a first operating mode and a second operating mode, and the machine tool is converted from the first operating mode to the second operating mode if the parameter ascertained by the device exceeds or falls below a defined threshold. The electric motor is actuated in the second operating mode with a current strength profile, said current strength profile comprising first current pulses (10) and second current pulses (11). The level of the maximum current strength (A1) of the first current pulses (10) is higher than the level of the maximum current strength (A2) of the second current pulses (11). The invention additionally relates to a machine tool which can be operated using such a method.
Description
technical field [0001] The invention relates to a method for operating a machining tool with a battery and an electric motor according to the type described in more detail in the preamble of claim 1 . Furthermore, the invention relates to a machining tool according to the type described in more detail in claim 14 . Background technique [0002] In known practice machining tools which are designed with a battery-operable regulating motor, the output torque applied to the output shaft increases and thus the motor current required to provide this output torque increases, e.g. When the hole is increased, to provide a corresponding increase in output torque and maintain the desired speed of the motor rotor. If the braking torque applied to the output shaft exceeds the performance capacity of the motor, the rotor will stop even if the motor current increases. Without hardware protection or software protection, the locked rotor and high current applied can damage the electronics ...
Claims
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IPC IPC(8): B25B23/145B25B23/147B25F5/00
CPCB25B23/147B25B23/1475B25B23/1456B25F5/00B25F5/001
Inventor 刘钦B·吉尔迈尔S·施密德
Owner HILTI AG