WO2020083883A2

WO2020083883A2 - Device and method for operating a machine tool

Info

Publication number: WO2020083883A2
Application number: PCT/EP2019/078676
Authority: WO
Inventors: Boris Regaard; Winfried Magg; Ulrich Meindl
Original assignee: Trumpf Werkzeugmaschinen Gmbh + Co. Kg
Priority date: 2018-10-22
Filing date: 2019-10-22
Publication date: 2020-04-30
Also published as: WO2020083883A3; DE102018126167A1

Abstract

The invention relates to a device for operating a machine tool, in particular a laser machining tool, wherein the machine tool can be operated at least temporarily in a first operating mode in which an advancing speed of the machine tool is controlled by means of a control device. The device comprises an input interface for inputting first data by a user, and the device is designed to influence first data received via the input interface and a control variable of the control device for controlling the advancing speed of the machine tool in accordance with the first data.

Description

Title: Device and method for operating a

Machine tool

description

Field of the Invention

The disclosure relates to a device for operating a machine tool, in particular one

Laser processing machine.

The disclosure further relates to a method for operating a machine tool, in particular one

Laser processing machine.

The disclosure further relates to a machine tool, in particular a laser processing machine. State of the art

WO 2010/045935 A1 describes a device and a device

Method for controlling a processing system known.

Description of the invention

Preferred embodiments relate to a

Device for operating a machine tool, in particular a laser processing machine, the machine tool being operable at least temporarily in a first operating mode in which a feed rate (“feed”) of the machine tool is regulated by means of a control device, the device using an input interface for inputting first data has a user, and wherein the device is designed to receive the first data via the input interface and a reference variable of the control device for controlling the

To influence the feed rate of the machine tool as a function of the first data. As a result, the user can advantageously influence the processing by the

Take the machine tool. In particular, this is

enables an intuitive operating concept for - at least temporarily - regulated operation of the

To provide machine tools in which the user can influence the machining despite the regulation.

In further preferred embodiments it is provided that the first data can be predetermined by the user

Characterize the feed rate, the

Device is designed to form second data as a function of the first data and the reference variable of the

Control device for controlling the feed rate of the machine tool as a function of the second data influence. This gives further degrees of freedom in influencing the command variable.

In further preferred embodiments, it is provided that the device has a plurality of assignment rules, each of which assign different values to the feed rate that can be specified by the user to influence the command variable, in particular at least one of the multiple assignment rules comprising at least one table. Thus, for example, in

Dependence on a material and / or other

Properties of a machine tool too

machining workpiece and / or depending on a specific user, a corresponding assignment rule can be selected, e.g. can be optimized for the respective application.

In further preferred embodiments, it is provided that at least one of the multiple assignment rules effects a linear assignment, which results in an intuitive

Operation and in particular the possibility of influencing the feed rate results.

In further preferred embodiments, it is provided that at least one of the several assignment rules effects a non-linear assignment. In this way e.g. a sensitivity to influencing the command variable in

Dependency of values of the feed rate that can be specified by the user. For example, it is conceivable, for comparatively large values, that by the

To design the user-definable feed rate to assign values for influencing the reference variable in such a way that comparatively small changes occur Influence of the reference variable result, whereas for, for example, comparatively small values, that of the user

Predeterminable feed rate an assignment to the values for influencing the reference variable in such a way

is designed so that there are comparatively larger changes.

In further preferred embodiments it is provided that the input interface has at least one potentiometer. The potentiometer enables efficient

User input of desired values for the

Feed speed, for example a value range from 0% (percent) to 120% of the possible

Feed speed (in particular based on a controlled operation that may also be possible in other embodiments, in which a feed speed of the

Machine tool is controlled, see below) can be covered by the first data. In further preferred embodiments, the stated value range can in particular also be above 100%, because in the regulated operation in which the

In contrast, the feed rate of the machine tool is regulated by means of the control device

controlled operation higher speeds (again based on the maximum possible feed speed in the controlled operation) can be achieved, for example with appropriate material quality and / or heat build-up in the workpiece, etc.

In further preferred embodiments, an incremental encoder can also be provided as an alternative or in addition to the potentiometer in order to enter the first data. In the case of further preferred embodiments, a control panel, in particular, can be used as an alternative or in addition to the potentiometer electronic control panel can be provided, which is designed for the graphic and / or textual input of data, in particular (also) the first data. For example, in further preferred embodiments, the provision of a graphical user interface by the input interface is also conceivable, for example on a touch-sensitive one

Display device (in particular touch-sensitive flat screen, "touchscreen").

In further preferred embodiments it is provided that the machine tool can be operated at least temporarily in a second operating mode, in which one

Feed speed of the machine tool is controlled, the device being designed to output the first data as a reference variable for controlling the feed speed when the machine tool is operated in the second operating mode. In other words, in these embodiments, the feed rate can be directly during the second operating mode of the machine tool

(due to the elimination of the regulation) are specified by the first data, whereas in the case of further preferred ones

Embodiments in the first (regulated) mode of operation make it possible to influence the reference variable of the regulation by means of the first data, which is advantageous

there is increased safety in the operation of the machine tool.

In further preferred embodiments, it is provided that the device is designed to do this when the feed rate that can be specified by the user (in particular by means of the first data) has a predetermined first threshold value (for example 80%, for example based on the maximum possible feed rate mentioned in the controlled one Operation) falls below, a change of the machine tool from the first operating mode to one or the second

To initiate the operating mode (e.g. by

Signaling to or the control device of the

Machine tool) in which the feed speed of the machine tool is controlled. This can be special

be expedient if sensible, controlled operation of the machine tool with a comparatively low feed rate specified by the user is no longer possible, the user may still expect the feed rate to be further reduced in accordance with his specification. As a result, even if the predeterminable first threshold value is undershot, it is advantageous for the

User traceable operating behavior and at the same time ensures reliable operation of the machine tool.

In further preferred embodiments, it is provided that the device is designed to switch the machine tool from the second operating mode when the feed rate that can be predetermined by the user exceeds the predetermined first threshold value

(Feed rate controlled) to the first operating mode (feed rate controlled)

(again, for example, by signaling to the control device of the machine tool) so that the advantages of controlled operation can be used. At the same time, the user can advantageously continue to influence the operating behavior of the machine tool in a comprehensible manner, namely by specifying the first data, which as before

described act on the command variable of the control device for controlling the feed rate. In further preferred embodiments it is provided that in regulated operation when the predeterminable first threshold value is reached, in particular under nominal conditions (for example correctly set machine tool and narrow)

tolerated workpiece), sets exactly the preset value of the controlled operation corresponding to the first threshold value (corresponding to the one that can be specified by the user)

Feed rate, 80% in the example), even if, in further preferred embodiments, a slightly higher default value (for example 105%) is sought, if the feed rate can be set by the user of 100%. This will be a transition from that to the

Feed speed - regulated operation to the

controlled operation as gently as possible, especially without

abrupt change in feed rate, designed. This can be the case in further preferred embodiments

can be realized, for example, by taking the smooth transition mentioned into account in the at least one assignment rule or table.

For a transition from controlled operation to that

regulated operation, e.g. when the first threshold value is exceeded by the user-definable

Feed rate applies to other preferred ones

Embodiments corresponding, so that even with one

Change of operating mode in this direction a smooth transition with respect to the feed speed is realized.

In further preferred embodiments, the first threshold value can be predetermined, e.g. 80% based on a maximum possible feed rate in the

controlled operation of the machine tool. With others

preferred embodiments, the first threshold can also be specified dynamically, that is to say, for example, changed during operation of the device or the machine tool, for example as specified by a user and / or in

Dependency on operating parameters of the device or the machine tool.

Further preferred embodiments relate to a machine tool, in particular a laser processing machine, for machining workpieces, the machine tool being able to be operated at least temporarily in a first operating mode in which a feed rate of the machine tool is regulated by means of a control device, with at least one device according to the embodiments.

In further preferred embodiments it is provided that the machine tool is a laser cutting machine or a laser welding machine.

In further preferred embodiments, it is provided that the control device is designed to, in the first operating mode, one, in particular maximum,

Set the feed rate that is greater than or equal to a reference feed rate of the

controlled operation. This can be the case with others

Embodiments in particular take place in a "nominal state" (e.g. correctly set machine tool and narrowly tolerated workpiece), for example by appropriate

Specification of a or the management variable.

Further preferred embodiments relate to a method for operating a machine tool, in particular a laser processing machine, the machine tool being able to be operated at least temporarily in a first operating mode in which a feed rate of the machine tool is regulated by means of a control device, one

Device is provided which has an input interface for the input of first data by a user, and wherein the device the first data on the

Receives input interface and a command variable of the control device for controlling the feed rate of the machine tool depending on the first data

influenced.

In further preferred embodiments it is provided that the machine tool is operated at least temporarily in the first operating mode, the reference variable of the control device being influenced as a function of the first data in the first operating mode, and wherein the machine tool is operated at least temporarily in a second operating mode which controls the feed rate of the machine tool, the first data being used as a reference variable for controlling the

Feed speed can be used.

In further preferred embodiments it is provided that the reference variable of the control device for the control and / or regulation of the feed speed of the

Machine tool is limited to a range of values that ensures reliable processing of a workpiece. This can lead to undesired operating states or a

incorrect machining of a workpiece - regardless of the first data - can be avoided. Nevertheless, the user can use the first data to make a setting e.g. between slow and fast laser processing, regardless of the setting

Process reliability through regulation by means of

Control device is ensured. Further features, possible applications and advantages of the invention result from the following description of exemplary embodiments of the invention, which are shown in the figures of the drawing. All of the features described or illustrated form individually or in any way

Combination of the subject matter of the invention, regardless of their summary in the claims or their relationship and regardless of their wording or representation in the description or in the drawing.

The drawing shows:

FIG. 1 schematically shows a simplified block diagram according to preferred embodiments,

Figure 2 schematically shows a simplified flow diagram of a

Method according to preferred embodiments,

Figure 3 schematically shows a simplified block diagram of a

Device according to further preferred

Embodiments,

FIG. 4 schematically shows a simplified flow diagram according to further preferred embodiments,

Figure 5 schematically shows a table according to another preferred

Embodiments,

Figure 6 schematically shows a time diagram according to another

preferred embodiments, and

Figure 7 schematically shows a simplified block diagram of a

Device according to further preferred

Embodiments. FIG. 1 schematically shows a simplified block diagram of a device 100 for operating a machine tool 200 according to preferred embodiments. The machine tool 200 can be, for example, a laser processing machine that is designed to process a workpiece 300 by means of laser radiation, the workpiece 300 being movable, for example, at a predeterminable feed rate V relative to a laser processing head 220 of the machine tool 200 that emits the laser radiation, and /or the other way around. For this purpose, the machine tool 200 can regulate the feed speed V in a first operating mode by means of a control device 210.

A reference variable F for the regulation of

Feed speed V by means of the control device 210 can, for example, by configuration data for the

Machine tool 200 or a parameterization can be specified.

The device 100 has an input interface 110 for inputting first data D1 by a user B. The device 100 is designed to receive the first data D1 via the input interface 110, cf. also

Step 400 of the flowchart in FIG. 2, and the

Command variable F of the control device 210 for controlling the feed speed V of the machine tool 200 in

To influence dependency of the first data Dl, cf. Arrow A1 from FIG. 1 and step 402 from FIG. 2.

This allows the user B to advantageously influence the

Take machining of workpiece 300 by machine tool 200. In particular, this makes it possible to provide an intuitive operating concept for controlled operation of machine tool 200, at least temporarily, in which the user B can influence the processing despite the regulation.

In further preferred embodiments it is provided that the device 100 (FIG. 1) has at least one

Assignment rule ZV1 (see also below, Fig. 3), which e.g. assigns different values for influencing the command variable F to the first data D1, the assignment rule in particular comprising at least one table. In further preferred embodiments, for example, an assignment rule of the form F = x * Dl can also be provided, ie a linear function that a

Influencing the command variable F in dependence on the first data Dl and a factor x causes. In other preferred embodiments, functions other than that are also

Linear function mentioned above as an example can be used.

FIG. 3 schematically shows a simplified block diagram of a device 100a according to further preferred

Embodiments in which it is provided that the first data D1 can be predetermined by the user B.

Characterize the feed rate V _B E _N , where the

Device 100a is designed to form second data D2 as a function of the first data D1 and the

To influence the reference variable F (FIG. 1) of the control device 210 for controlling the feed speed V of the machine tool 200 as a function of the second data D2.

This gives further degrees of freedom in influencing the command variable F.

In further preferred embodiments it is provided that the device 100a has a plurality of assignment rules ZV1, ZV2, ZV3, which each have different values of the Allocate different values F 'for influencing the command variable F by the feed speed V _B E _N which can be predetermined by the user, in particular at least one of the several allocation rules comprising at least one table. Thus, for example, depending on a material and / or other properties, a means of

Machine tool 200 to be machined workpiece 300 and / or depending on a specific user B a

corresponding assignment rule ZV1, ZV2, ZV3 can be selected, which e.g. can be optimized for the respective application. In contrast, in further preferred embodiments, only one assignment rule ZV1 can be provided.

In the present case, the device 100a has an optional one

Data interface 120, which implements an output of the second data D2 or the values F 'to the machine tool 200 or its control device 210, cf. also the arrow A1 from FIG. 1. In further embodiments, the device 100, 100a can also be inserted into the machine tool 200 or

Control device 210 may be integrated.

In further preferred embodiments it is provided that at least one of the multiple assignment rules ZV1, ZV2, ZV3 effects a linear assignment, which results in intuitive operation and in particular the possibility of

Influencing the feed rate results. This is described below using the flow diagram from FIG. 4 as an example. Shown is a feed rate V _BEt n which can be _specified by the user B (FIG. 1) and can be entered, for example, via the input interface 110.

For example, the feed speed V _BEN which can be specified by the user B (FIG. 1) has a possible one Range of values from zero to 100. By means of the first assignment rule ZV1 (FIG. 4) considered as an example, any possible value of the feed rate V _B E _{N which} can be predetermined by the user B (FIG. 1) can advantageously be used

corresponding value F '(for example again from 0 to 100 or for example from 0 to 50, etc.) to influence the command variable F, which can be supplied to the control device 210. The first assignment rule ZV1 according to FIG. 4 can, in preferred embodiments, for example by means of a table T, cf. Fig. 5, can be realized. The table T has two columns S1, S2 and N has many rows ZI to ZN, the first column S1 possible values of the feed rate V _B E _N which can be specified by the user B (FIG. 1) and the second column S2 the values F to be assigned ', by means of which the command variable F is influenced.

In further preferred embodiments, it is provided that at least one of the plurality of assignment rules ZV1, ZV2, ZV3 (FIG. 3) brings about a non-linear assignment. In this way, it is possible, for example, to predefine a sensitivity for influencing the command variable F as a function of values of the feed speed V _BEN which can be specified by the user. For example, it is conceivable for comparatively large values to be predefined by the user

Feed speed V _{BEN is} to be assigned to values F 'for influencing the command variable F in such a way that there are comparatively small changes for influencing the command variable, whereas, for example, comparatively small values are those which can be specified by the user

Feed speed V _{BEN is} assigned to the values F 'for influencing the reference variable in such a way that comparatively larger changes result. In further preferred embodiments, it is provided that the input interface 110 (FIG. 1) has at least one potentiometer or is designed as a potentiometer. The potentiometer enables an efficient user input of desired values for the feed rate, for example a value range from 0% to 120% of the possible feed rate (in particular based on a possibly controlled operation BA2 (see below) in further embodiments, in which the feed rate V of the machine tool 200) is covered by the first data D1. In further preferred embodiments, an incremental encoder or a comparable device can also be used as an alternative or in addition to the potentiometer

be provided to enter the first data Dl.

In further preferred embodiments, as an alternative or in addition to the potentiometer, a control panel (not shown), in particular an electronic control panel, can also be provided, which is used for the graphic and / or textual input of

Data, in particular (also) the first data Dl. For example, others are preferred

Embodiments also conceivable the provision of a graphical user interface by the input interface 110, e.g. on a touch-sensitive display device (in particular a touch-sensitive flat screen,

"Touchscreen").

In further preferred embodiments, it is provided that the machine tool 200 (FIG. 1) can be operated at least temporarily in a second operating mode, in which one

Feed speed V of the machine tool 200 is controlled, the device 100, 100a being designed to do so when the machine tool 200 is in the second operating mode is operated to output the first data Dl as a reference variable for controlling the feed rate V. In other words, in these embodiments, during the second operating mode of the machine tool 200, the

Feed rate V can be specified directly (due to the elimination of the regulation) by means of the input interface 110 through the first data D1, whereas in further preferred embodiments in the first (regulated) operating mode an influence on the reference variable F (FIG.

1) the control is made possible by means of the first data D1, which advantageously increases the safety of the

Operation of the machine tool 200 is given. FIG. 6 schematically shows a time diagram with a horizontal time axis t, the machine tool 200 operating in the first operating mode BAI in a first time range from the time t0 to the time t1, that is to say regulated, and in a second time range from the time The machine tool 200 is operated in the second operating mode BA2 until the time t3 in which the

Feed speed V is controlled.

In further preferred embodiments it is provided that the device 100, 100a is designed to do this when the feed speed V _B E _N which can be specified by the user B (in particular by means of the first data D1) is one

predeterminable first threshold value (e.g. 80%, e.g.

based on the maximum possible

Feed rate in controlled operation)

falls below, to cause a change of the machine tool 200 from the first operating mode BAI to the second operating mode BA2 (for example by signaling to the

Control device 210 of the machine tool 200) in which the Feed speed V of the machine tool 200 is controlled. This can be particularly expedient if a sensible, regulated operation of the machine tool with a comparatively low one specified by the user

Feed speed V _B E _{N is} no longer possible, the user B may still expect that the

Feed speed V is further reduced according to its specification. As a result, even if the predeterminable first threshold value is undershot, it is advantageous for the

User B understandable operating behavior and

at the same time, reliable operation of the machine tool 200 is ensured.

In further preferred embodiments, it is provided that the device 100, 100a is designed for this purpose when the one that can be specified by the user B.

Feed rate V _B E _N exceeds the predeterminable first threshold value, to cause the machine tool 200 to change from the second operating mode BA2 (feed rate controlled) to the first operating mode BAI (feed rate controlled) (for example again by a

Signaling to the control device 210 of the

Machine tool 200) so that the advantages of regulated operation can be used. At the same time, the user can benefit from the operating behavior of the machine tool

continue to influence in a comprehensible manner, namely by specifying the first data D1, which, as already described, act on the command variable F of the control device 210 for controlling the feed rate V.

In further preferred embodiments it is provided that in regulated operation when the predefinable first threshold value is reached, in particular under nominal conditions (eg correctly set machine tool and tightly tolerated workpiece), sets exactly the preset value of the controlled operation corresponding to the first threshold value (corresponding to the one that can be specified by the user)

Feed speed - regulated operation to the

controlled operation as gently as possible, especially without

can be realized, for example, by taking the smooth transition mentioned into account in the at least one assignment rule ZV1 (FIG. 3) or in a table.

For a transition from controlled operation to that

Feed rate applies to other preferred ones

Embodiments corresponding, so that even with one

Operating mode change in this direction a smooth transition with respect to the feed speed V is realized.

controlled operation of the machine tool. With others

In preferred embodiments, the first threshold value can also be specified dynamically, that is to say changed, for example, during operation of the device or the machine tool, for example as specified by a user and / or Dependency on operating parameters of the device or the machine tool.

Further preferred embodiments relate to a machine tool 200 (FIG. 1), in particular

Laser processing machine, for processing workpieces 300, wherein the machine tool 200 can be operated at least temporarily in one of the first operating modes BAI (FIG. 6) in which the feed speed V (FIG. 1) of the

Machine tool 200 is controlled by means of control device 210, machine tool 200 being at least one

Device 100, 100a according to the embodiments.

In further preferred embodiments, the device 100, 100a can be arranged or provided externally to the machine tool 200, wherein a data connection A1 (FIG. 1) can be used to influence the reference variable F as a function of the first data D1. With other preferred

The device 100, 100a can also be implemented in the

Machine tool 200 may be arranged or provided, wherein a corresponding internal data connection (not shown) can be used to influence the command variable F as a function of the first data D1.

In further preferred embodiments, it is provided that the machine tool 200 is a laser cutting machine or a laser welding machine.

Further preferred embodiments relate to a method for operating a machine tool 200,

in particular a laser processing machine, the

Machine tool 200 at least temporarily in a first

Operating mode BAI (Fig. 6) can be operated in which one

Feed speed V (FIG. 1) of the machine tool 200 is regulated by means of a control device 210, the device 100, 100a being provided, which the

Has input interface 110 for inputting first data D1 by user B, and wherein the device 100, 100a has the first data D1 via the input interface 110

receives and the command variable F of the control device 210 for the control of the feed speed V of the

Machine tool 200 influenced depending on the first data Dl.

In further preferred embodiments, it is provided that the machine tool 200 (FIG. 1) is operated at least temporarily in the first operating mode BAI (FIG. 6), the reference variable F in the first operating mode BAI

Control device 210 is influenced as a function of the first data D1, and the machine tool 200 is operated at least temporarily in the second operating mode BA2 (FIG. 6), in which the feed speed V of the

Machine tool 200 is controlled, the first data D1 being used as a reference variable for controlling the feed rate V in the second operating mode BA2.

In further preferred embodiments, it is provided that the command variable F (FIG. 1) of the control device 210 for the control and / or regulation of the feed speed V of the machine tool 200 is limited to a range of values which ensures reliable processing of a workpiece 300. This makes it possible to avoid undesired operating states or faulty machining of a workpiece 300, regardless of the first data D1.

FIG. 7 schematically shows a block diagram of a device 100b according to further preferred embodiments. For example, the device 100 according to FIG. 1 and / or the device 100a according to FIG. 3 can have the configuration 100b according to FIG. 7. The device 100b has one

Computing unit 102 (e.g. microprocessor and / or

Microcontroller and / or programmable logic module, in particular FPGA, and / or application-specific

integrated circuit, ASIC, and / or digital

Signal processor, DSP, and / or a combination thereof) and a storage unit 104. The storage unit 104 has a volatile memory 104a, in particular working memory (RAM), and a non-volatile memory 104b, e.g. a flash EEPROM, on. At least one computer program PRG for the computing unit 102 is stored in the non-volatile memory 104b, which executes the method according to the embodiments and / or another operation of the

Controls device 100, 100a and / or the machine tool 200.

In further preferred embodiments, the control device 210 of the machine tool 200 can have the configuration shown in FIG. 7, wherein the

Computer program PRG, for example, the regulation of

Feed speed V realized.

Alternatively or additionally, the functionality of both the device 100, 100a and the functionality of the

Control device 210 by the one shown in FIG. 7

Configuration 100b can be realized, the optional input interface being indicated by block 110.

In particular, the assignment rules ZV1, ZV2, ZV3 (FIG. 3) or table T (FIG. 5) can also be stored at least temporarily in the memory device 104, cf. the reference symbol ZV from FIG. 7. In other preferred embodiments, the

Control device 210 configured such that, in particular in a “nominal state” (correctly set

Machine tool 200 and closely tolerated workpiece 300), results in a feed rate V that corresponds at least approximately to a reference feed rate for the case of controlled operation or is slightly above it.

The principle according to the embodiments advantageously makes it possible to provide an operating concept which is intuitive for the user or operator B (FIG. 1) of the machine tool 200 and which, in particular, permits operation similar to machine tools without regulating the feed rate. This results in a behavior that is easy to understand for the user or operator B during the operation of the

Machine tool 200.

The principle according to the embodiments can be used in further preferred embodiments to provide an advantageous operating concept for the machine tool 200, e.g. designed as a 2D laser cutting machine, can be used, which is based on the following hypotheses: Operator B expects in the nominal state that the control of the

Feed speed V increases (at least not decreases) the feed speed V. Operator B expects that when the feed rate control V is activated, no incorrect cut will occur. Operator B expects a known response when adjusting potentiometer ("Poti") 110

(Feed change, i.e. change of

Feed speed V). The operator B would like to keep control even in the controlled operation of the machine tool 200, for example reducing the position of the potentiometer 110 (corresponding to smaller values of the first data D1, corresponding to a lower feed speed V) to cut more robustly or nicely, but he never wants to cut slower than necessary. The operator increases the

Position of the potentiometer 110 (corresponding to larger values of the first data Dl) to cut faster, but it never wants a wrong cut. In further preferred embodiments, these requirements can advantageously be met by applying the principle described above.

In further preferred embodiments, it is provided that the reference variable F influenced by the potentiometer 110 leads to a normal feed setting under nominal conditions. In further preferred embodiments, a table T (FIG. 5) with several (> 1) values F 'can be used for this

Influencing the command variable F (or directly with values for the command variable F), which e.g. for each position of the potentiometer 110 to a desired behavior, that is to say in particular for regulating the potentiometer 110

predetermined feed rate V, leads. In further preferred embodiments it is provided that at

changed conditions (machine 200 or material 300) the set or influenced reference variable F.

constant machining quality with a possibly changed feed speed V. In further preferred embodiments it is provided that in a controlled operation, cf. the second operating mode BA2 (Fig. 6), the

Machine 200 with the feed set on potentiometer 110

(Feed speed V) cuts, i.e. without that

additional security through regulation. With others

In preferred embodiments, the table T (FIG. 5), which can also be referred to as the “reference variable table”, or their values can be shifted, so that when the regulation of the feed speed V is activated

Nominal conditions set a somewhat larger feed (approx. 5-10%). In this way e.g. targeted one in

controlled operation BA2 priced feed reserve can be reduced.

The aspects described above by way of example with reference to a machine tool 200 designed as a 2D laser cutting machine can be preferred in the case of further ones

Embodiments also on other types of

Laser processing machines are transmitted.

Claims

1. Device (100; 100a; 100b) for operating a

Machine tool (200), in particular one

Laser processing machine (200), the

The machine tool (200) can be operated at least temporarily in a first operating mode (BAI) in which a feed speed (V) of the machine tool (200) is regulated by means of a control device (210), the device (100; 100a; 100b) being a

Has input interface (110) for inputting first data (DI) by a user (B), and wherein the device (100; 100a; 100b) is designed to receive (400) the first data (DI) via the input interface (110) ) and a reference variable (F) of the control device (210) for controlling the

To influence (402) the feed rate (V) of the machine tool (200) as a function of the first data (DI).

2. The device (100; 100a; 100b) according to claim 1, wherein the first data (Dl) characterize a feed rate (V _B E _N ) which can be predetermined by the user (B), and wherein the device (100; 100a; 100b) does so is configured to form second data (D2) as a function of the first data (Dl) and the reference variable (F) of the

Control device (210) for controlling the

To influence (402) the feed rate (V) of the machine tool (200) as a function of the second data (D2).

3. The device (100; 100a; 100b) according to claim 2, wherein the device (100; 100a; 100b) several

Assignment rules (ZV1, ZV2, ZV3; ZV), which each have different values of the feed rate (V _B E _N ) which can be specified by the user (B), different values (F ') for influencing the

Assign command variable (F), at least one of the several assignment rules (ZV1, ZV2, ZV3; ZV) comprising at least one table (T).

4. The device (100; 100a; 100b) according to claim 3, wherein

at least one of the several assignment rules (ZV1, ZV2, ZV3; ZV) effects a linear assignment.

5. The device (100; 100a; 100b) according to claim 3 or 4, wherein at least one of the plurality

Allocation rules (ZV1, ZV2, ZV3; ZV) one

causes nonlinear assignment.

6. The device (100; 100a; 100b) according to at least one of the preceding claims, wherein the input interface (110) has at least one potentiometer (112).

7. The device (100; 100a; 100b) according to at least one of the preceding claims, wherein the machine tool (200) can be operated at least temporarily in a second operating mode (BA2) in which a feed speed (V) of the machine tool (200) is controlled, wherein the device (100; 100a; 100b) is designed to, when the machine tool (200) is operated in the second operating mode (BA2), the first data (DI) as a reference variable for controlling the

Output feed speed (V).

8. The device (100; 100a; 100b) according to at least one of claims 2 to 7, wherein the device (100; 100a; 100b) is designed for this purpose when the feed rate (V _B E _N ) falls below a predeterminable first threshold value to cause the machine tool (200) to change from the first operating mode (BAI) to one or the second operating mode (BA2) in which the feed speed (V) of the machine tool (200) is controlled.

9. Machine tool (200), in particular

Laser processing machine (200) for processing workpieces (300), the machine tool (200) being able to be operated at least temporarily in a first operating mode (BAI) in which a feed speed (V) of the machine tool (200) can be operated by means of a

Control device (210) is controlled with at least one device (100; 100a; 100b) according to at least one of claims 1 to 8.

10. The machine tool (200) according to claim 9, wherein the

Machine tool (200) is a laser cutting machine or a laser welding machine.

11. Machine tool (200) according to claim 9 or 10, wherein the control device (210) is designed to set a, in particular maximum, feed rate (V) in the first operating mode (BAI) which is greater than or equal to a reference feed rate of a controlled operation (BA2).

12. Method for operating a machine tool (200), in particular a laser processing machine (200), the machine tool (200) at least temporarily in a first operating mode (BAI) can be operated, in which a feed speed (V) of the machine tool (200) is controlled by means of a control device (210), a device (100; 100a; 100b)

is provided which has an input interface (110) for inputting first data (Dl) by a user (B), and wherein the device (100; 100a; 100b) receives the first data (Dl) via the input interface (110) ( 400) and a reference variable (F) of the control device (210) for the control of the

Feed speed (V) of the machine tool (200) is influenced as a function of the first data (DI) (402).

13. The method of claim 12, wherein the machine tool

(200) is operated at least temporarily in the first operating mode (BAI), the reference variable (F) of the control device (210) being influenced (402) in dependence on the first data (DI) in the first operating mode (BAI), and wherein the Machine tool (200) is operated at least temporarily in a second operating mode (BA2) in which the feed rate (V) of the

Machine tool (200) is controlled, in the second operating mode (BA2) the first data (DI) as a reference variable for controlling the

Feed speed (V) can be used.

14. The method according to at least one of claims 12 to 13, wherein the command variable (F) of the control device (210) for the control and / or regulation of the

Feed speed (V) of the machine tool (200) is limited to a range of values that a

reliable processing of a workpiece (300).