Machine tool system and method for operating same

Abstract

The present invention relates to a machine tool system comprising a machine tool and at least one first power supply device and a second power supply device. A communication link is provided between the machine tool and the first and / or the second power supply device, whereby information about the properties of the power supply devices can be transmitted to the machine tool via this communication link. The machine tool includes a sensor for detecting a physical parameter of the machine tool, as well as a display device for displaying an operating recommendation for the operation of the machine tool. The operating recommendation includes information about the properties of the power supply device and about the physical parameter of the machine tool.In a second aspect, the invention relates to a method for operating such a machine tool system.

Description

[0001] The present invention relates to a machine tool system comprising a machine tool and at least one first power supply device and a second power supply device. A communication link is provided between the machine tool and the first and / or the second power supply device, whereby information about the properties of the power supply devices can be transmitted to the machine tool via this communication link. The machine tool includes a sensing device for detecting a physical parameter of the machine tool, as well as a display device for displaying an operating recommendation for the operation of the machine tool. The operating recommendation includes information about the properties of the power supply device and about the physical parameter of the machine tool.In a second aspect, the invention relates to a method for operating such a machine tool system. Background of the invention:

[0002] Battery-powered machine tools are becoming increasingly popular in the machine tool sector. Responding to this consumer demand, many machine tool manufacturers offer a wide range of different machines, often compatible with various power supplies from the same manufacturer. These power supplies, forming a so-called battery platform, frequently differ in their performance. At the same time, there is a desire for all of a manufacturer's machine tools to be compatible with as many batteries as possible from the manufacturer's current platform. This creates a conflict of objectives, as not every battery is ideally suited for every machine tool or every specific task.This can impair the comfort or user experience for the user of the machine tool if the machine tool or its battery behaves unexpectedly.

[0003] To assist the user of a machine tool and provide them with further information, so-called power displays are known in the prior art. These displays indicate to the user an optimal power range for operating the machine tool. Such a power display for mains-powered machine tools is disclosed, for example, in US 2017 274 487 A1. However, the power display disclosed in US 2017 274 487 A1 does not yet take into account the specific characteristics that can arise when using battery-powered or accumulator-powered machine tools.

[0004] Due to the differing demands placed on the power supply by high-performance machine tools, which have high requirements, and lower-performance machine tools, a situation can arise where a machine tool's power supply shuts down due to thermal overload and needs to be replaced, even though its full energy capacity cannot be utilized. This is frustrating and hinders efficient operation of a battery-powered machine tool.

[0005] The object underlying the present invention is to overcome the above-described shortcomings and disadvantages of the prior art and to provide a machine tool system with an improved power display, wherein the improved power display also takes into account the special requirements that may arise when using battery-powered or accumulator-powered machine tools.

[0006] The problem is solved by the subject matter of the independent claims. Advantageous embodiments relating to the subject matter of the independent claims are found in the dependent claims. Description of the invention:

[0007] According to the invention, a machine tool system is provided, comprising a machine tool and at least one first power supply device and a second power supply device. During its operation, the machine tool is connected to either the first or the second power supply device to receive electrical power. A communication link exists between the machine tool and the first and / or the second power supply device, enabling information about the properties of the power supply devices to be transmitted to the machine tool via this communication link.The machine tool comprises a detection device for detecting a physical quantity of the machine tool, as well as a display device for displaying an operating recommendation for the operation of the machine tool, wherein the operating recommendation includes information about the characteristics of the power supply device to which the machine tool is connected and about the physical quantity of the machine tool.

[0008] It is particularly preferred in the context of the invention that the physical quantity is power or power requirement. However, the physical quantity can also be an electric current or voltage, or any other quantity with which the power of the machine tool can be determined or derived. Preferably, the machine tool comprises a sensing device for detecting the power or power requirement of the machine tool, as well as a display device for showing an operating recommendation for the operation of the machine tool, wherein the operating recommendation includes information about the characteristics of the power supply device to which the machine tool is connected and about the power of the machine tool. The physical quantity can, in particular, also be an electric current. This is especially preferred when the machine tool operates at a constant voltage.In addition to these electrical quantities, which can represent a physical quantity within the meaning of the invention, the physical quantity can also be a mechanical quantity. Preferably, the term "physical quantity" can also refer to rotational speed and / or torque. It is preferred within the meaning of the invention that the power of the machine tool can be derived from the "electrical quantities" rotational speed and / or torque. The operating recommendation preferably represents an improved power display, which advantageously also takes into account the special requirements that may arise when using battery-powered or accumulator-operated machine tools. In particular, the invention allows the data relating to the different properties of different batteries to be combined with the power data of the machine tool using information technology in order to provide the improved power display.To derive operating recommendations for the user of the machine tool.

[0009] The properties of the power supply devices can preferably also include their temperature or temperature increase during operation of the machine tool. In other words, the temperature or a temperature increase of the power supply devices can be measured during operation of the machine tool, and this measured quantity can preferably also represent a "property of the power supply device" within the meaning of the invention.

[0010] It is particularly preferred within the scope of the invention that the physical quantity is an electrical and / or a mechanical quantity, or a combination of such quantities. For example, the torque and speed of the machine tool's motor can represent physical quantities within the scope of the invention, preferably being mechanical quantities that can be converted into electrical quantities via suitable sensors or detection devices. Naturally, the machine tool's control unit can also be used for converting previously detected mechanical quantities into electrical quantities. Preferably, the detection of mechanical quantities and their conversion into electrical quantities can constitute an important component of the proposed control method.The acquisition of mechanical quantities and their conversion into electrical quantities advantageously results in the provision, within the context of the invention, of a physical quantity which, together with the battery characteristics, can be used as the basis for generating operating recommendations for the operation of the machine tool. In other words, it is preferred within the scope of the invention that a mechanical quantity – preferably with a dedicated acquisition device – can be acquired to provide a physical quantity. This mechanical quantity can then be converted – preferably with a dedicated control device – into an electrical quantity that can be processed particularly easily using information technology to determine operating recommendations for the machine tool. For this purpose, the physical or...Electrical quantity combined with information about the properties of the power supply devices, advantageously providing an operating recommendation for the user of the machine tool.

[0011] It is preferred according to the invention that both power supply devices are not used simultaneously to supply the machine tool with electrical energy. Rather, it is preferred according to the invention that the power supply devices are alternative power supply devices in the sense that the machine tool is supplied with electrical energy either by the first or by the second power supply device. In this way, the power supply devices and the machine tool form a machine tool system, wherein the machine tool can be connected to a particularly suitable power supply device for different applications.Preferably, the machine tool system can comprise a plurality of power supply devices, wherein the machine tool is connected to exactly one power supply device at a time during its operation to obtain electrical energy. Preferably, the machine tool is connected to exactly one power supply device during its operation, namely the first power supply device, the second power supply device, or the nth power supply device. The power supply devices can have various properties and preferably differ in at least one property. It is preferred, according to the invention, that the power supply devices are configured to supply the machine tool with electrical energy, and that the power supply devices differ in at least one property.The suggested operating recommendation for the machine tool indicates whether the power supply currently installed and used on the machine tool is more or less suitable for the application being performed. This recommendation advantageously assists the machine tool user in selecting a particularly suitable power supply, allowing them to use a different, yet optimally suited, power supply for different tasks. This can significantly increase the machine tool's operating efficiency.

[0012] It is preferred, according to the invention, that the machine tool is configured to combine a battery discharge current with a power requirement, the combination of which is used to determine the operating recommendation. The battery discharge current can preferably be the maximum current value achievable during continuous discharge of the power supply device without thermal shutdown of the power supply device. According to the invention, this current value can preferably also be referred to as the One Stroke Discharge Current and abbreviated as OSDC. The power requirement is preferably a maximum power requirement, which can be derived, in particular, from the current and voltage of the machine tool.

[0013] The invention provides that the machine tool includes a sensing device for detecting a physical quantity of the machine tool, wherein the physical quantity can in particular be power or power consumption. In this embodiment of the invention, it is particularly preferred that the machine tool includes a sensing device for detecting the power of the machine tool. The machine tool is preferably configured to detect power or another physical quantity of the machine tool with the sensing device of the machine tool in order to subsequently evaluate the power or other physical quantity together with information about the properties of the battery connected to the machine tool. The power of the machine tool can preferably be the input power and / or the output power of the machine tool.It is preferred according to the invention that the sensing device can be integrated into a control device of the machine tool or that the sensing device forms a component of the control device. However, the sensing device can also be a separate component of the machine tool. It is also preferred according to the invention that the input and / or output power of the machine tool can be displayed on the display device of the machine tool.

[0014] It is particularly preferred within the scope of the invention that the user of the machine tool can be shown the optimal range for the physical parameters of the machine tool for a specific application by means of the display device. Preferably, the user of the machine tool can be shown the optimal performance of the machine tool for a specific application by means of the display device. This preferably means, within the scope of the invention, that the user can, for example, be shown the optimal device performance for the application currently being carried out with the machine tool. If the machine tool is, for example, a core drilling machine with which cylindrical cores can be cut out of a substrate, the user of the machine tool can, for example, be shown the optimal performance of the core drilling machine for the currently being drilled hole.

[0015] It is preferred, according to the invention, that a color code is used to indicate the optimal range of the electrical parameter for the operation of the machine tool, wherein the color "yellow" represents an excessively low value of the physical parameter of the machine tool, the color "green" represents an optimal range of the physical parameter of the machine tool, and the color "red" represents an excessively high value of the physical parameter of the machine tool. The operator of the machine tool can advantageously be alerted by the display device of the machine tool whether they are operating the machine tool in an advantageous operating condition (green display). If this is not the case (red display), the operator of the machine tool can take measures to optimize or improve the operation of the machine tool.In other words, the recommended power or operating range of the machine tool encompasses the green power or operating range, while the red power or operating range is not recommended if the battery-powered machine tool is to be operated optimally in the sense that the maximum energy content can be drawn from the power supply device. For example, a color code can be used to indicate the optimal power of the machine tool, with the color "yellow" representing insufficient power, the color "green" representing optimal power, and the color "red" representing excessive power. According to the invention, the machine tool is configured to display an operating recommendation to the user, depending on the power supply device to which the machine tool is connected.The phrase “depending on the power supply device” preferably means, within the meaning of the invention, that the operating recommendation is created depending on the properties of the power supply device and / or depending on a type of power supply device.

[0016] A fundamental concept underlying the present invention is that the display of the physical quantity on the display device of the machine tool can be combined with the properties of the power supply device, wherein the display of the physical quantity can, in particular, be a power indicator of the machine tool. The inventors have recognized that the different applications that can be performed with a machine tool entail different requirements for the power supply device that provides the machine tool with electrical energy. Accordingly, for each of the different applications that can be performed with a machine tool, there are more or less suitable power supply devices for providing the machine tool with the required electrical energy.Different applications of the machine tool can include, for example, drilling in column mode or drilling manually. Drilling in column mode often requires more power than drilling manually.

[0017] By combining information about the properties of the power supply device, which is transmitted from the respective power supply device to the machine tool, with the power output as an example of the physical quantity of the machine tool that can be detected by the machine tool's sensing device, improved operating support for the machine tool user can advantageously be provided. It is preferred, according to the invention, that the display of the physical quantity is combined with the information about the properties of the power supply device in such a way—i.e., processed together using information technology—that an operating recommendation for the machine tool user can change depending on the power supply device used.In a particularly preferred embodiment of the invention, a power display can be combined with information about the properties of the power supply device, i.e., processed together using information technology, in such a way that an operating recommendation for the user of the machine tool can change depending on the power supply device used.

[0018] This operating recommendation can, for example, be referred to as a "drilling recommendation" within the meaning of the invention if the machine tool is a core drilling machine. If the power output is displayed on a display device of the machine tool, and a color-coded display is used, the yellow, green, and red color ranges can shift depending on the power supply device used. Alternatively or additionally, the sizes of the red, green, or yellow areas on the display device can change depending on the type of power supply device used.

[0019] According to the invention, the operating recommendation includes information about the characteristics of the power supply device to which the machine tool is connected and about a physical quantity of the machine tool. Preferably, this physical quantity can be the power output or power requirement of the machine tool. It is preferred, in accordance with the invention, that the operating recommendation includes information about the characteristics of the power supply device to which the machine tool is connected and about the power output of the machine tool.

[0020] That the operating recommendation includes information about the characteristics of the power supply devices and about a physical quantity and / or a power output of the machine tool, preferably means, within the meaning of the invention, that when generating the operating recommendation—preferably by the machine tool or its control device—both the information about the characteristics of the power supply device to which the machine tool is connected and the information about the physical quantity and / or power output of the machine tool are taken into account. In other words, the operating recommendation can preferably be generated based on the data about the characteristics of the power supply device to which the machine tool is connected and the data about the physical quantity and / or power output of the machine tool.Therefore, the machine tool of the proposed machine tool system is designed to combine information about the characteristics of the power supply device to which the machine tool is connected with information about the physical size and / or power of the machine tool and to derive an operating recommendation for the machine tool user from this combination of data. This operating recommendation can then be made available to the user via the display device. The operating recommendation is optimized or improved in such a way that it recommends operating the machine tool in a way that allows for the maximum possible energy extraction from the power supply device.In other words, the operating recommendation enables battery-optimized use of the machine tool, allowing the battery to be used for as long as possible without replacement or recharging, while advantageously discharging the battery optimally. The desired battery-optimized use of the machine tool or the proposed machine tool system can be achieved in particular by making the machine tool's power display dependent on the power supply device used. This means that information about the battery type, as well as information about the machine tool's input or output power, is taken into account to generate an operating recommendation for the machine tool user. This enables the machine tool user to operate the machine tool in a particularly battery-optimized manner.In the context of the invention, this preferably means that the user can use the power supply device to which the machine tool is connected for as long as possible, ideally until it is completely or substantially completely discharged. Such a complete or substantially complete discharge of the battery can be described, in the context of the invention, as the maximum amount of energy being extracted from the power supply device.

[0021] Advantageously, the invention enables the display of the physical quantity to be adapted based on the battery type used or based on the properties of the battery used. In particular, the invention provides an adaptation of the power display. This allows the use of different power supply devices on a single battery platform without compromising the efficient operation of the machine tool. Specifically, this allows the same interface on the machine tool to be used for different power supply devices, making the machine tool system particularly user-friendly and simple. Advantageously, the user can determine at a glance from the operating instructions whether the battery is suitable for a specific application.The invention addresses the task at hand, and a particular advantage lies in the fact that, for the first time, performance data or data on a physical quantity of the machine tool are combined with data on the characteristics or type of the power supply device used, in order to provide improved operating recommendations for the user. A further advantage of the invention is that the limits or threshold values ​​of the performance display or the display of the physical quantity can be adjusted depending on the type of power supply device or battery used to provide the machine tool with electrical energy. This allows for particularly efficient use of the energy capacity of the power supply device, as a maximum amount of energy can be extracted from it.Advantageously, all or substantially all of the energy content of the power supply device used can be utilized, particularly without undesirable thermal shutdown of the battery. In a preferred embodiment of the invention, the maximum power output of the machine tool can be maintained without limitation by the battery used.

[0022] It is preferred, according to the invention, that the operating recommendation includes a color code indicating whether the machine tool is being operated within an optimal range of physical parameters. The optimal range of physical parameters can, in particular, correspond to an optimal performance range of the machine tool. The color code can, for example, include the colors yellow, red, and green, with the color "green" symbolizing that the machine tool is operating within an optimal range of physical parameters, and the colors "yellow" and "red" symbolizing that the machine tool's physical parameters are too high (red) or too low (yellow), respectively. The user of the machine tool can then react to the operating recommendation, which preferably includes a color code, by taking appropriate measures and thus bring the machine tool's operation into a recommended or optimal performance and operating range.The operating recommendation preferably includes a display of the physical quantity as a function of the characteristics of the power supply device to which the machine tool is connected. According to the invention, it is preferred that the color "green" symbolizes the operation of the machine tool within an optimal performance range, while the colors "yellow" and "red" symbolize that the machine tool's performance is too high (red) or too low (yellow). The operating recommendation thus preferably includes a performance display that depends on the characteristics of the power supply device to which the machine tool is connected.

[0023] It is preferred according to the invention that the areas of the colors yellow, green, and red can shift within the operating recommendation or the display of the indicator device depending on the power supply device used. Alternatively or additionally, the sizes of the red, green, or yellow areas on the indicator device or within the operating recommendation can change depending on the type of power supply device used. The shifting or adjustment of these color areas can be achieved, for example, by adjusting the upper and / or lower limits for the different colors or their color ranges depending on the type of battery used.The color ranges of the operating recommendation can be adjusted, in particular, depending on whether the machine tool is connected to a power supply device suitable for the current application. The requirements for the power supply device preferably result from the physical size or power output of the machine tool, which can be detected by its sensing device. For example, the power required for the current application can advantageously be compared with information about the characteristics of the power supply device to which the machine tool is connected.In the context of the present invention, a power supply device can be considered suitable if the properties of the power supply device match the requirements of the task currently being performed with the machine tool and the power supply device can supply the machine tool with a sufficiently large amount of electrical energy and / or power for the task to be performed.

[0024] When using a "suitable" power supply device, for example, an initial operating recommendation can be displayed on the display device, showing, for example, a yellow area on the left, a green area in the middle, and a red area on the right (see Figure 2With a suitable power supply device, the color zones can, for example, be essentially the same size or width. The individual color zones are delineated from one another by upper and lower limits, which may shift if a different power supply device or a different type of power supply device is used to supply the machine tool with electrical power. For example, if a power supply device is used that cannot provide the required power for the machine tool or the task to be performed, the upper and / or lower limits of the color zones can be adjusted to suit the specific battery. This results in a second operating recommendation for an unsuitable power supply device.A particular advantage of the invention is that by adapting the boundaries of the color ranges to the specific battery requirements, the entire or substantially the entire energy content of the power supply unit connected to the machine tool can be utilized. In particular, this prevents thermal shutdown of the power supply unit, thus ensuring that its energy content is used to its fullest potential for the operation of the machine tool.

[0025] It is preferred, according to the invention, that the first power supply device has a first set of properties and the second power supply device has a second set of properties, wherein the first and second sets of properties differ in at least one property. The properties can be, for example, electrical and / or mechanical properties. The electrical properties can be, for example, a rated power, a rated voltage, a capacitance, or an electric current. The prefix "rated" preferably means, according to the invention, that these are predetermined properties that the power supply device is intended to have or fulfill under certain conditions. Such "rated" specifications can, for example, be provided by the manufacturer of the power supply devices.For example, a power supply device may have a nominal voltage of 22 V. A person skilled in the art knows that a power supply device with a nominal voltage of 22 V may exhibit different actual voltages during operation, and that the actual voltage may change – for example, depending on the state of charge, temperature, or other internal or external conditions. The mechanical properties may include, for example, the number of cells and / or cell strings in the power supply device. For example, a power supply device may comprise eighteen cells, which may be arranged in three cell strings. Other power supply devices may have only one cell string with, for example, six cells, or two cell strings with twelve cells.Different numbers of cells and / or cell strings in the power supply device can result in varying electrical properties of the power supply device. These properties can include, in particular, information about the "type" of the power supply device, which, in the context of the present invention, can preferably also be referred to as "batteries." The "battery types" can include, for example, the type of cells in the power supply device (e.g., cylindrical cells), the number of cell strings (one, two, or three cell strings), or different power, voltage, and / or quality classes, but are not limited to these.

[0026] The power supply devices of the proposed machine tool system can be, for example, suitable and unsuitable. For instance, the first power supply device might be suitable, while the second might be unsuitable, perhaps because it has low power output. The power supply devices then differ in their suitability for the machine tool or the task to be performed. In other words, at least one characteristic in which the power supply devices differ in this embodiment can be the suitability of the respective battery for the machine tool or the application to be performed.Naturally, the power supply devices can also differ in their type, power class and / or voltage class or in other mechanical and / or electrical properties.

[0027] It is preferred within the scope of the invention that the maximum power of the machine tool, i.e., its maximum power limit, is not restricted in order to continue to enable high performance in the short term. In this way, particularly demanding tasks with high power requirements can continue to be handled by the machine tool. This is especially important for core drilling machines. When drilling into a substrate such as concrete with the core drilling machine, the drill bit of the core drilling machine may encounter a piece of metal, for example, a reinforcing bar or the like. To enable the cutting through of such a "metal hit," it is advantageous of the invention if the maximum power of the machine tool, i.e., its maximum power limit, is not restricted. Of course, it can also be provided in the context of the present invention that the maximum power of the machine tool, i.e.,Their maximum power limit is restricted, for example to protect the power supply device.

[0028] It is particularly advantageous within the scope of the invention that the user of the machine tool can choose between the two operating modes "maximum power limit is not restricted" and "maximum power limit is restricted" and consciously decide on one or the other. For example, if the presence of iron is expected in the substrate to be machined, the user can deliberately select the operating mode "maximum power limit is not restricted" in order to be able to cut through the iron during operation, i.e., while drilling. This operating mode of the machine tool can therefore be referred to as a "boost function" within the scope of the invention. If no iron is expected in the substrate to be machined, the user can, for example, select the operating mode "maximum power limit is restricted" to conserve the machine tool's battery.This operating mode of the machine tool can be referred to, for example, as standard or eco mode.

[0029] A power supply device that cannot provide the required power for the machine tool or the task to be performed is preferably referred to as an "unsuitable" power supply device within the meaning of the invention. For example, when using an unsuitable battery, the red area of ​​the power indicator or the operating recommendation may be significantly larger than in the first operating recommendation for the suitable power supply device. Consequently, the red area in the second operating recommendation for the unsuitable power supply device may be significantly larger than in the first operating recommendation for the suitable power supply device.In the second operating recommendation for the unsuitable power supply device, the color areas preferably do not have similar sizes or widths; instead, the red color area, indicating excessive power demand from the machine tool, is significantly larger compared to the first operating recommendation for the suitable power supply device. The second operating recommendation for the unsuitable power supply device specifically represents an operating recommendation for a power supply device that is actually too weak for the task to be performed or for the machine tool. Of course, a power supply device that is actually too powerful can also be used, provided it is suitable for the task to be performed or for the machine tool.The machine tool is unsuitable for supplying electrical energy to significantly more powerful machine tools capable of handling tasks with particularly high power requirements. In this case, a third operating recommendation can be issued, in which the yellow and green color areas occupy a larger space or width than in the first operating recommendation for suitable power supply devices.

[0030] It is preferred, according to the invention, that the display device is also configured to display the transmitted information about the properties of the power supply device. In other words, the display device can show the transmitted information about the properties of the power supply device to which the machine tool is connected. Preferably, the display device can show both the actually transmitted information about the properties of the power supply device to which the machine tool is connected and, alternatively or additionally, the display device can be configured to display processed data or information about the properties of the power supply device to which the machine tool is connected. For this purpose, the machine tool can include a control device for processing the transmitted information.The display device can be, for example, a screen, a display, a touchscreen, a monitor or any other human-machine interface (HMI).

[0031] It is preferred, according to the invention, that the machine tool includes a control device for processing the transmitted information. The display device of the machine tool can preferably be configured to display the performance of the machine tool and / or information about the characteristics of the power supply devices.

[0032] It is preferred according to the invention that the machine tool comprises a first communication device, the first power supply device a first EV communication device, and the second power supply device a second EV communication device, wherein the communication devices are configured to establish a communication link between the machine tool and the first and / or the second power supply device. Preferably, the first communication device can be referred to as the machine tool communication device, the first EV communication device as the first battery communication device, and the second EV communication device as the second battery communication device.Preferably, the communication link for transmitting information about the properties of the power supply devices can be established between the machine tool on the one hand and one of the at least two power supply devices on the other. The communication link exists, in particular, between the machine tool and the power supply device to which the machine tool is connected.

[0033] In one embodiment, the invention relates to a machine tool system comprising a machine tool and at least one first power supply device and a second power supply device, wherein the power supply devices are configured to supply the machine tool with electrical energy and wherein the power supply devices differ in at least one characteristic. The machine tool comprises a first communication device, the first power supply device a first EV communication device, and the second power supply device a second EV communication device, wherein the communication devices are configured to establish a communication link between the machine tool and the first and / or the second power supply device.Information about the characteristics of the power supply devices can be transmitted to the machine tool via the communication link, the machine tool being configured to adapt its operation to the transmitted information about the characteristics of the power supply device in order to extract maximum energy content from the power supply device.

[0034] In a second aspect, the invention relates to a method for operating a machine tool system. The terms, definitions, and technical advantages introduced for the machine tool system preferably apply analogously to the operating method for the machine tool system. The operating method is characterized by the following process steps: a) Establishing a communication link between the machine tool and the first and / or second power supply device of the machine tool system, b) Transmitting information about the properties of the power supply devices to the machine tool via the communication link, c) Acquiring a physical quantity of the machine tool by a sensing device of the machine tool, d) Displaying an operating recommendation for the operation of the machine tool on a display device of the machine tool, the operating recommendation includes information about the characteristics of the power supply device and about the physical size of the machine tool.

[0035] The proposed method improves user support for machine tools by incorporating information about the battery used when generating operating recommendations. Furthermore, a variety of different batteries can be used with the machine tool, allowing the user to adapt their work practices to the battery type. This is facilitated by the enhanced operating recommendations, which include information about the characteristics of the power supply and the machine tool's performance. The invention enables users to better respond to power supplies with varying capacities and significantly increase their work efficiency with the machine tool.In particular, this can facilitate the use of the full breadth of a battery platform and thus increase its acceptance.

[0036] If the physical quantity is power, the process steps c) and d) can be formulated as follows: c) Recording the power output of the machine tool by a recording device of the machine tool, d) Displaying an operating recommendation for the operation of the machine tool on a display device of the machine tool, the operating recommendation includes information about the characteristics of the power supply device and the performance of the machine tool.

[0037] Further advantages arise from the following description of the figures. The figures, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0038] In the figures, identical and similar components are numbered with the same reference symbols. They show: Fig. 1 View of a preferred embodiment of the proposed machine tool system. Fig. 2 Exemplary illustrations of operating recommendations for power supply devices of varying power outputs. Examples of implementation and description of figures:

[0039] Figure 1Figure 1 schematically shows a preferred embodiment of the proposed machine tool system 100. The machine tool system 100 comprises a machine tool 10 connected to a power supply device (50 or 60) for electrical power. The power supply device (50 or 60) can be, for example, a high-power or low-power power supply device, wherein the power supply devices 50, 60 are preferably part of a so-called power supply platform. Such platforms are offered, for example, by different machine tool manufacturers to allow users of a battery-powered machine tool from the respective manufacturer to use different power supply devices from the same manufacturer on the machine tool.The machine tool 10 can be connected to one power supply device (50 or 60) to supply the machine tool 10 with electrical energy.

[0040] The in Fig. 1The machine tool 10 shown in the illustration has a first communication device 30 configured to establish a communication link 18 with the communication devices 52, 62 of the power supply devices 50, 60. Data can be exchanged between the machine tool 10 and the power supply devices 50, 60 via the communication link 18. According to the invention, information about the properties of the power supply devices 50, 60 is transmitted from the power supply devices 50, 60 to the machine tool 10. When the machine tool 10 is connected to the first power supply device 50 to receive electrical power, the communication link 18 is preferably established between the first communication device 30 of the machine tool and the first EV communication device 52 of the first power supply device 50.When the machine tool 10 is connected to the second power supply device 60 to receive electrical power, the communication link 18 is preferably established between the first communication device 30 of the machine tool and the second EV communication device 62 of the second power supply device 60. In other words, the communication link 18 is preferably established between the machine tool 10 and the power supply device (50 or 60) that is connected to the machine tool 10 and that supplies the machine tool 10 with electrical power.

[0041] The machine tool 10 can, for example, be configured as a core drilling machine and have a drill bit as tool 32. The tool 32 can be connected to the machine tool 10 via a tool holder 36, and the tool 32 of the machine tool 10 can be driven by a motor 34 of the machine tool 10. The in Figure 1 The illustrated machine tool 10 has a display device 14 for displaying an operating recommendation 16 (see Figure 2) for the user of the machine tool 10, as well as a detection device 12 for detecting the electrical power of the machine tool 10. Furthermore, the machine tool 10 can have a control device 28 with which the information received from the power supply devices 50, 60 about the properties of the power supply devices 50, 60 can be evaluated. The detection device 12 can preferably be part of the control device 28 or be integrated into the control device 28, as in Fig. 1The control device 28 of the machine tool 10 is specifically configured to combine the information received from the power supply devices 50, 60 regarding their characteristics with the data concerning the performance of the machine tool 10. This performance data is acquired by the acquisition device 12 of the machine tool 10; it can be forwarded from the acquisition device 12 to the control device 28. The control device 14 is specifically configured to generate an operating recommendation 16 based on the information about the characteristics of the power supply devices 50, 60 and the performance data of the machine tool 10, which can then be displayed on the display device 14 of the machine tool 10.A particular advantage of the invention is that the operating recommendation 16 can differ for power supply devices 50, 60 with varying power outputs. This is shown in . Figure 2 depicted.

[0042] Figure 2 Figure 16 shows exemplary different representations of operating recommendations for power supply devices of varying power outputs. Figures 50 and 60 illustrate this. Figure 2 Operating recommendations 16 for four different power supply devices 50, 60 are presented, with the power output or capacity of the power supply devices 50, 60 increasing from left to right. This means that the operating recommendation 16 on the left side of Figure 2 corresponds to the weakest power supply device, while operating recommendation 16 is on the right side of Figure 2This corresponds to the most powerful power supply device. The left arrow below the four individual figures shows the respective recommended operating range 38 for the machine tool 10.

[0043] This recommended operating range 38 for the machine tool 10 corresponds in particular to the green operating range 24 of the machine tool 10, i.e. the optimal operating range 24. In this operating range 24 of the machine tool 10, no overload or overheating of the power supply device (50 or 60) is to be expected, so these operating ranges can be recommended for the operation of the machine tool 10.

[0044] The display on the display device 14 or the operating recommendation 16 may also include a red zone 26 in which the machine tool 10 is operated at excessive power. In this operating zone 26, there is a risk of overloading and / or overheating the power supply device (50 or 60) of the machine tool 10, so this operating zone 26 is not recommended. The different operating zones 22, 24, 26 preferably form a color code 20, which can visually support or emphasize the operating recommendation 16 for the user of the machine tool 10.

[0045] In a non-color representation, the optimal operating range 24 of the machine tool 10 is located midway between the "yellow" operating range 22 and the "red" operating range 26 of the machine tool 10. Operating range 22, with performance values ​​in a comparatively low range, is located to the left of the "green," optimal operating range 24 of the machine tool 10, while operating range 26, with performance values ​​in a comparatively high range, is located to the right of the "green," optimal operating range 24 of the machine tool 10. In a grayscale representation, operating range 26, with (too) high performance values ​​of the machine tool 10, is indicated by a particularly dark shade of gray, while operating range 22, with (too) low performance values ​​of the machine tool 10, is indicated by a particularly light shade of gray.The optimal operating range 24, represented by a medium shade of gray, is located midway between the low operating range 22 (left) and the high operating range 26 (right).

[0046] Figure 2It can be seen in particular that the recommended working area 38 increases from left to right, i.e., with increasing power of the power supply device used (50 or 60). In other words, the more powerful the power supply device used (50 or 60), the larger the recommended working area 38 of the machine tool 10. While in the illustration on the left, which corresponds to the operating recommendation 16 for the lowest-powered power supply device (50 or 60), the red, non-recommended working area 26 of the machine tool 10 predominates, this red area 26 becomes smaller from left to right with increasing power of the power supply device (50 or 60), so that in the operating recommendation 16 for the highest-powered power supply device (50 or 60) on the right, Figure 2The recommended working range 38, which preferably corresponds to the optimal operating range 24, predominates. Reference symbol list

[0047] 10 Machine tool 12 Detection device 14 Display device 16 Operating recommendation 18 Communication link 20 Color coding 22 Yellow area 24 Green area 26 Red area 28 Control device 30 First communication device (of the machine tool) 32 Tool of the machine tool 34 Motor of the machine tool 36 Tool holder 38 Recommended working area 50 First power supply device 52 First EV communication device 60 Second power supply device 62 Second EV communication device 100 Machine tool system

Claims

1. A machine tool system (100) comprising a machine tool (10) and at least one first power supply device (50) and one second power supply device (60), wherein the machine tool (10) is connected during its operation either to the first power supply device (50) or to the second power supply device (60), characterized in thata communication connection (18) exists between the machine tool (10) and the first energy supply device (50) and / or the second energy supply device (60), wherein information about properties of the energy supply devices (50, 60) can be transmitted to the machine tool (10) by means of the communication connection (18), wherein the machine tool (10) comprises a detection device (12) for detecting a physical variable of the machine tool (10), wherein the machine tool (10) comprises a display device (14) for displaying an operating recommendation (16) for operating the machine tool (10), wherein the operating recommendation (16) includes information about the properties of the energy supply devices (50, 60) and about the physical variable of the machine tool (10).

2. Machine tool system (100) according to claim 1 characterized in thatthe operating recommendation (16) comprises a color coding (20) which indicates whether the machine tool (10) is operated in an optimal range of the physical size.

3. Machine tool system (100) according to claim 2 characterized in that the color coding (20) comprises an optimal range (24) of the physical quantity, as well as a range (22) of the physical quantity in which the machine tool (10) is operated with a value of the physical quantity that is too low, and a range (26) in which the machine tool (10) is operated with a value of the physical quantity that is too high.

4. Machine tool system (100) according to claim 3 characterized in thatthe optimal range (24) of the physical quantity corresponds to a green range of the operating recommendation (16), the range (22) in which the machine tool (10) is operated with a value of the physical quantity that is too low corresponds to a yellow range of the operating recommendation (16) and the range (26) in which the machine tool (10) is operated with a value of the physical quantity that is too high corresponds to a red range of the operating recommendation (16).

5. Machine tool system (100) according to one of the preceding claims characterized in that the machine tool (10) comprises a control device (12) for processing the transmitted information.

6. Machine tool system (100) according to one of the preceding claims characterized in thatthe machine tool (10) comprises a first communication device (30), the first energy supply device (50) comprises a first EV communication device (52) and the second energy supply device (60) comprises a second EV communication device (62), wherein the communication devices (30, 52, 62) are configured to establish a communication connection (18) between the machine tool (10) and the first energy supply device (50) and / or the second energy supply device (60).

7. Method for operating a machine tool system (100) according to one of the preceding claims characterized by the following process steps:a) establishing a communication connection (18) between the machine tool (10) and the first energy supply device (50) and / or the second energy supply device (60) of the machine tool system (100), b) transmitting information about properties of the energy supply devices (50, 60) to the machine tool (10) by means of the communication connection (18), c) detecting a physical variable of the machine tool (10) by a detecting device (12) of the machine tool (10), d) displaying an operating recommendation (16) for the operation of the machine tool (10) on a display device (14) of the machine tool (10), wherein the operating recommendation (16) includes information about the properties of the energy supply devices (50, 60) and about the physical variable of the machine tool (10).

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