EP2195714A1 - Method for determining a thermally induced change in position of a machine tool section of a machine tool - Google Patents
Method for determining a thermally induced change in position of a machine tool section of a machine toolInfo
- Publication number
- EP2195714A1 EP2195714A1 EP08803973A EP08803973A EP2195714A1 EP 2195714 A1 EP2195714 A1 EP 2195714A1 EP 08803973 A EP08803973 A EP 08803973A EP 08803973 A EP08803973 A EP 08803973A EP 2195714 A1 EP2195714 A1 EP 2195714A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- machine tool
- section
- tool section
- model
- change
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/404—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/49—Nc machine tool, till multiple
- G05B2219/49206—Compensation temperature, thermal displacement, use measured temperature
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/49—Nc machine tool, till multiple
- G05B2219/49207—Compensate thermal displacement using measured distance
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/49—Nc machine tool, till multiple
- G05B2219/49219—Compensation temperature, thermal displacement
Definitions
- the invention relates to a method for determining a thermally induced change in position of a machine tool section of a machine tool, wherein the machine tool section is movable along a machine tool axis.
- a method for the compensation of errors of a position control of a reference point of a controllable in at least one axis machine wherein the position control comprises a path control, a device for position detection and a control device.
- the following method steps are provided: detecting the current position of all the axes participating in the path control, calculating the current position of the reference point from the current positions of the axes involved in the path control, calculating the deformation of the machine as a function of variables leading to a deformation of the machine and the current positions of the axes involved in the path control, and correction of the calculated current position of the reference point as a function of the current deformation of the machine.
- DE 198 48 642 A1 discloses a method for compensating for temperature-related dimensional deviations in the machine geometry, in particular a machine tool or a robot, in which user inputs are carried out in a first coordinate system and a conversion into a second coordinate system is carried out in order to control signals for the machine Axis drives to determine known.
- the compensation of temperature-related dimensional deviations occurs before the conversion of the coordinates from the first to the second coordinate system.
- a measuring system and communication system for thermal errors in a machine tool is known. It is provided a module which serves to compensate for thermal errors of the machine tool.
- the module includes an operational part, a database, an analog-to-digital converter, a counter and a digital input / output.
- the operational part all determines the coefficients of a model equation for the thermal error that dictates the relationship between temperatures and thermal errors at different operating conditions.
- a machine tool which is controlled by a process comprising the steps of measuring geometrical and thermal errors, providing a global differential machine tool position model and using this model to control the real time compensation of the machine tool operation.
- a controller modifies the position feedback signals used by the machine to compensate for geometrical and thermal errors dictated by the model.
- the machine tool can only under constant Environmental conditions are operated. However, this requires a complex air conditioning of an environment of the machine tool. To improve the machining accuracy, the machine tool can also be operated only in a warmed-up state. During such a warm-up phase, however, the machine tool can not be used productively.
- the present invention has the object to provide a method of the type mentioned, with which the change in position of the machine tool section can be determined as simple as possible.
- a deformation model of the machine tool is created, which indicates a relationship between the position change to be determined and at least one input relative to the machine tool axis, wherein the at least one input variable comprises at least one temperature value, and for determining the thermally induced position change, the at least one input variable is detected and entered into the deformation model.
- a particularly simple deformation model can be specified.
- This refers to a machine tool axis along which the machine tool section is movable is.
- the deformation model is only created once and allows the determination of a thermally induced change in position of the machine tool section as a function of a varying input variable.
- the input variable comprises at least one temperature value, since this has a significant influence on the thermally induced change in position of the machine tool section.
- the relationship between the position change to be determined and at least one input variable of the deformation model is applied linearly. This makes it possible to specify a proportional assignment rule between a variable input variable and a position change of the machine tool section to be determined on the basis of a detected input variable.
- the deformation model is created independently of an operating state of the machine tool.
- a particularly simple deformation model can be provided, which has validity for all operating states of the machine tool, in particular for different temperature states of the machine tool.
- At least one input variable is detected during operation of the machine tool and entered into the deformation model. This allows a timely and simple determination of a thermally induced change in position of the machine tool section.
- the machine tool section comprises at least one workpiece carrier or is formed by a workpiece carrier.
- the machine tool section detects a tool carrier or is formed by a tool carrier. By determining a thermally induced deviation of such a tool carrier, this can be compensated, for example, by a corresponding control of the tool carrier, but also by a corresponding control of a workpiece carrier of the machine tool.
- the machine tool section comprises at least one carriage or is formed by such a carriage.
- a carriage can serve, for example, for arranging a tool carrier and / or workpiece carrier displaceably mounted on the carriage.
- the at least one input variable of the deformation model comprises an ambient temperature of the machine tool.
- the ambient temperature of the machine tool has a particularly great influence on changes in position of the machine tool section. This is because the ambient temperature of the entire machine tool is imprinted.
- the at least one input variable of the deformation model comprises a reference temperature detected at the machine tool.
- this reference temperature corresponds to the ambient temperature.
- a transient state of Machine tool deviates from the reference temperature of the ambient temperature, so that based on the reference temperature a more accurate determination of a change in position of the machine tool section is possible.
- the reference temperature is detected at or in a machine tool area, which is at least substantially unaffected by heat sources of the machine tool.
- a machine tool area which is at least substantially unaffected by heat sources of the machine tool.
- an unaffected by internal machine heat sources heating or cooling of the entire machine tool can be detected. This heating or cooling causes corresponding changes in length of all parts of the machine tool.
- the machine tool comprises at least one machine tool part, which is directly or indirectly kinematically coupled to the machine tool section.
- This allows the determination of a change in length of a machine tool part.
- This change in length at least proportionally influences the change in position of the machine tool section.
- the at least one machine tool part is stationary. This allows the determination of a change in length, which is independent of other machine tool parts.
- the at least one machine tool part is a
- Machine bed and / or a machine frame is formed by a machine bed and / or a machine frame.
- These machine tool parts experience a particularly large change in length when the ambient temperature and / or the reference temperature of the machine tool changes. They therefore have a great influence on the change in position of the machine tool section.
- the at least one machine tool part comprises a position measuring device for detecting the relative position of the machine tool section and a stationary machine tool part or is formed by such a position measuring device.
- a detected relative position can be used, for example, as a controlled variable for controlling a drive device for driving the machine tool section.
- the at least one input variable of the deformation model comprises the relative position of the machine tool section and of a stationary machine tool part. This makes it possible to determine a change in position of the machine tool section not only as a function of a temperature value, but additionally as a function of the relative position of the machine tool section and of the stationary machine tool part.
- the deformation model preferably contains a model element assigned to the machine tool section.
- a change in length of the machine tool section can be determined with the aid of such a model element.
- the model element indicates a relationship between an ambient temperature of the machine tool and / or a reference temperature detected on the machine tool, on the one hand, and a change in length of the machine tool section related to the machine tool axis, on the other hand.
- thermally induced shortening or extensions of the machine tool section can be determined.
- the above relationship is applied linearly.
- a linear relationship is determined, for example, by an expansion coefficient of the material of the machine tool section and by the length of the machine tool section in a direction parallel to the tool machine axis and at a reference temperature.
- the deformation model contains a model element which is assigned to a machine tool part which is directly or indirectly kinematically coupled to the machine tool section. This allows a separate determination of a change in length of the machine tool part.
- model element associated with the machine tool part indicates a relationship between an ambient temperature of the machine tool and / or a reference temperature detected on the machine tool and a change in length of the machine tool part related to the machine tool axis.
- a linear input to the next inlet connexion in particular a coefficient of expansion of the machine tool part and the length of the tool machine part at a reference temperature, for example at 20 0 C.
- the machine tool comprises a working space and if the at least one input variable of the deformation model a work space position of the machine tool section comprises. This allows a particularly simple spatial assignment of different changes in length of the machine tool section and at least one machine tool part.
- the at least one input variable of the deformation model comprises a temperature value which is detected at at least one heat source of the machine tool.
- a temperature value which is detected at at least one heat source of the machine tool.
- Heat sources conditional local temperature influences are taken into account.
- a local temperature influence can cause a deformation of the machine tool, which causes a displacement of the machine tool section.
- Such a displacement has at least a proportionate influence on the position change of the machine tool section to be determined.
- the at least one heat source acts directly on the machine tool section.
- a heat source can be, for example, a coupling device, by means of which the machine tool section is coupled to a drive device for driving the machine tool section.
- a drive device for driving the machine tool section This may be, for example, the rotor of a linear drive or the spindle nut of a ball screw drive.
- a coupling device constitutes a heat source which deforms at least the machine tool section and thus contributes to a change in position of this machine tool section.
- the at least one heat source acts directly on a machine tool part, which is directly or indirectly kinematically coupled to the machine tool section.
- a heat source is, in particular, a drive device for driving the machine tool section.
- a consideration of such a heat source is particularly advantageous in drive devices, which are high performance and therefore can heat up significantly during operation of the machine tool.
- the deformation model contains at least one model element which indicates a relationship between a temperature difference and a displacement of the machine tool section relative to the machine tool axis, wherein the temperature difference is determined by the difference of a temperature value detected at the at least one heat source to an ambient temperature of the machine tool and / or a reference temperature detected at the machine tool.
- the relationship between the temperature difference and the displacement of the machine tool section relative to the machine tool axis is a linear relationship. This allows a particularly simple determination of a displacement of the machine tool section, which at least partially determines the change in position of the machine tool section.
- a coefficient characterizing the linear relationship it is advantageous to perform a finite element simulation.
- a temperature distribution applied above the machine tool and, based on this temperature distribution, a displacement of the temperature Machine tool section is calculated.
- the coefficient can then be determined by dividing the calculated displacement by the predetermined temperature difference.
- the parameter of the heat source can be specified in particular as heat output, heat flow and / or temperature difference.
- the temperature distribution is stationary. This allows the neglect of dynamic temperature influences and thus a simplification of the deformation model.
- the deformation model contains different heat sources of the machine tool separately assigned model elements. This makes it possible to provide a deformation model with which a change in position of the machine tool section can be accurately determined even at different temperatures of different heat sources.
- displacements of the machine tool section determined using various model elements of the deformation model are superimposed on one another in order to further increase the accuracy for determining the change in position of the machine tool section.
- the deformation model includes a model element associated with the machine tool section and / or a model element associated with a machine tool part which is directly or indirectly kinematically coupled to the machine tool section, and / or a model element that is a heat source of the machine tool is associated with that the deformation model contains at least two different model elements and that with the help of these different model elements certain changes in length and / or displacements of the machine tool section and / or the machine tool part each other be superimposed. This allows a particularly accurate and comprehensive determination of the change in position of the machine tool section composed of individual changes in length and / or displacements.
- the invention further relates to a method for compensating a thermally induced change in position of a machine tool section of a machine tool.
- the invention has the further object of specifying a method which allows a simple and accurate compensation of a thermally induced change in position of a machine tool section of a machine tool.
- thermally induced change in position of a machine tool section of a machine tool is determined by a method described above and that the determined in this way thermally induced position change is used as a control variable for driving a position changing means of the machine tool section.
- the position change device is formed for example by a drive device or an adjusting device.
- Figure 1 is a perspective view of an embodiment of a machine tool
- Figure 2 is a side view of the machine tool of Figure 1;
- Figure 3 is a symbolic representation of a deformation model for use in the machine tool of Figure 1;
- Figure 4 is a schematic side view of the machine tool
- Figure 5 is a schematic side view of the machine tool of Figure 1 in a due to the temperature distribution according to FIG.
- FIG. 6 shows a representation of temperature values acquired during operation of the machine tool from FIG. 1;
- FIG. 7 is an illustration of a time course of a change in position of a machine tool section of the machine tool from FIG. 1 using the temperature values shown in FIG. 6 and using the deformation model from FIG. 3; 8 shows a representation in which with the aid of the deformation model
- FIG. 1 shows an embodiment of a machine tool 10 is shown in perspective.
- the machine tool 10 has a machine bed 12 with which the machine tool 10 can be placed on a base. Furthermore, the machine tool 10 comprises a machine frame 14, which extends substantially perpendicular to the machine bed and is fixedly connected to the machine bed 12.
- the machine tool 10 has a workpiece carrier 16 which is movable relative to the machine bed 12.
- the machine tool 10 further has a tool carrier 18 in the form of a spindle.
- the tool carrier 18 may also be formed by a quill.
- the tool carrier 18 is arranged on a first carriage 20.
- the first carriage 20 in turn is mounted on a second carriage 22.
- the second carriage 22 is movably mounted on the machine frame 14.
- the carriages 20 and 22 form a cross slide unit.
- the workpiece carrier 16 is movable along a machine tool axis 24.
- This machine tool axis is the z-axis of the machine tool 10 in the embodiment shown in the drawing.
- the second carriage 22 is movable relative to the machine frame 14 along an x-axis of the machine tool 10. To this end, the carriage 20 can be moved with the tool carrier 18 along a y-axis relative to the second carriage 22.
- the machine tool 10 has a drive device 26 for driving the workpiece carrier 16 along the machine tool axis 24.
- the drive device 26 comprises a drive motor 28 fastened to the machine bed 12.
- the drive motor 28 acts via a spindle, not shown in FIG. 1 for reasons of clarity, on a coupling device 30 of the workpiece carrier 16.
- the coupling device 30 is formed in the form of a spindle nut 32.
- the machine tool 10 further comprises a position measuring device 34 in the form of a linear scale 36.
- the linear scale 36 is connected at the level of a relative to the extension of the linear scale 36 central position at a coupling point 38 fixed to the machine bed 12. Starting from the coupling point 38, a front portion 40 of the linear scale 36 may extend in a positive (z) direction along the machine tool axis 24. A rear portion 42 of the linear scale 36 may extend from the coupling point 38 along the machine tool axis 24 in the negative (z) direction.
- the workpiece carrier 16 and the tool carrier 18 are movable within a working space 44.
- both the working space positions of the workpiece carrier 16 and the working space positions of the tool carrier 18 must be matched to one another.
- the working space position of the workpiece carrier 16 can be changed by a corresponding control of the drive device 26.
- the machine tool 10 is exposed to thermal influences, for example an increase in the ambient temperature, the machine tool 10 is subject to thermally induced changes in length and displacements.
- the workpiece carrier 16 forms a machine tool section 48 whose thermally induced position change is to be determined relative to the machine tool axis 24 (z-axis).
- the position measuring device 34 forms a machine part 50 which is directly kinematically coupled to the machine tool section 48.
- the machine bed 12 forms a machine tool part 52 that is coupled indirectly (with the interposition of the position measuring device 34) kinematically to the machine tool section 48.
- the machine tool part 52 may alternatively also comprise the machine bed 12 in combination with the machine frame 14.
- the drive motor 28 which forms a heat source 54, heats up.
- the heat source 54 acts directly on the machine tool part 52 in the form of the machine bed 12.
- the coupling device 30 of the machine tool section 48 in the form of the workpiece carrier 16 also heats up and is regarded as a heat source 56 for the following considerations.
- the heat source 56 acts directly on the machine tool section 48.
- the machine tool 10 is equipped with a plurality of temperature sensors.
- a first temperature sensor 58 is arranged at the level of the coupling point 38 on the position-measuring device 34. With the aid of the temperature sensor 58, a reference temperature of the machine tool 10 can be determined.
- the machine tool 10 comprises a temperature sensor 60. This is arranged on the heat source 54 in the form of the drive motor 28. Another temperature sensor 62 is arranged on the heat source 56 in the form of the coupling device 30.
- a deformation model 64 shown symbolically in FIG. 3 is used. With the aid of the deformation model 64, a thermally induced change in position 68 of the machine tool section 48 can be determined on the basis of input variables 66 detected during operation of the machine tool 10.
- the deformation model 64 includes a plurality of model elements.
- a model element 70 is assigned to the machine tool section 48.
- Another model element 72 is assigned to the machine tool part 50.
- Another model element 74 is assigned to the machine tool part 52.
- Another model element 76 is associated with the heat source 54.
- Another model element 78 is associated with the heat source 56.
- the model element 70 contains an equation of the form:
- the factor alpha is determined by the material of which the machine tool section 48 is made.
- the reference length corresponds to the Initial length of the machine tool section 48 in parallel to the machine tool axis 24 direction at a reference temperature T Be train, for example at 20 0 C.
- the reference temperature T Re fe r enz (reference numeral 80, Figure 3) is detected by means of the temperature sensor 58. In this way, a change in length 82 can be determined with the aid of the model element 70.
- the model element 72 contains an equation of the form:
- the coefficient of the model element 72 results from the product of "alpha" and a reference length.
- the factor alpha is determined by the material of the machine tool part 50.
- Length change 84 of the machine tool part 50 to a shortening of the distance 93 On this basis, the model element 72 of the deformation model 64, a further input variable 66 in the form of a relative position 100 is supplied.
- the relative position 100 indicates the position of the machine tool section 48 relative to the stationary machine tool part 52.
- the working space position of the machine tool section 48 could also be used as a further input variable 66.
- the reference length can thus by difference formation from the relative position 100 and half the length of the machine tool part 50 in parallel to the machine tool axis 24 direction at a reference temperature T Be train (for example at 20 0 C) are determined.
- a reference temperature T Be train for example at 20 0 C
- a linear relationship between the reference temperature 80 (T Re fe r enz) and a thermally induced change in length 84 of the machine tool part 50 can be specified.
- the coefficient of a linear relationship between a change in length of the machine tool part 52 and the reference temperature 80 is determined by the material of the machine bed 12 and by a reference length of the machine bed at a reference temperature. In this way, a thermally induced change in length 86 of the machine tool part 52 can be determined.
- a temperature value 88 of the heat source 54 can be detected.
- a temperature value 90 of the heat source 56 can be detected.
- the model element 76 contains an equation of the form:
- Shift C * (Twarmepondere - T Re fe r enz) -
- resulting deformations of the machine tool 10 can be calculated (see FIG. 5).
- the machine bed 12 bends or bends due to the influence of the heat source 54, so that the machine frame 14 and thus the tool carrier 18 with respect to the machine tool axis 24 (z-axis) shift in the negative direction. This leads to an enlargement of the distance 93 shown in FIG. 2 between the tool carrier 18 and the workpiece carrier 16.
- a thus determined increase of the distance 93 is equal to the above-mentioned coefficient "c" multiplied by a temperature difference, which can be assumed for the calculation of the temperature distribution according to FIG. 4, or which occurs when a heat output or a heat output is specified
- the temperature difference is determined, for example, by the difference between a temperature assumed for the heat source 54 and a reference temperature, for example 20 ° C.
- the abovementioned coefficient "c" is now obtained by simple division from the magnification calculated using the finite element simulation the distance 93 and the said temperature difference.
- a displacement 92 can now be calculated, knowing the coefficient "c", based on the temperature values 80 (reference temperature) and 88 (temperature of the heat source 54) detected during operation of the machine tool.
- the model element 78 which is associated with the heat source 76, corresponds in its construction to the model element 76.
- the procedure for determining a coefficient of the model element 78 can be as described above, in which case it is not heat input by the heat source 54 but heat input is assumed by the heat source 56.
- a displacement 94 can then be determined with the aid of the model element 78 on the basis of the temperature values 80 (reference temperature) and 90 (temperature of the heat source 56).
- a plurality of different coefficients "c" can also be determined in each case and stored in the model elements. These different coefficients can be determined in particular on the basis of different positions of the carriages 20 and / or 22 in the x-direction and / or y-direction.
- the model elements 76 and 78 for determining a displacement 92 or 94, then, depending on the current position, the carriages 20 and / or 22 can be resorted to a corresponding coefficient.
- the length changes 82, 84, 86 determined as above and the displacements 92 and 94 are superimposed on one another with the aid of a linking unit 98.
- the kinematic structure of the machine tool 10 is taken into account, so that said length changes and displacements can be added with correctness.
- FIG. 6 shows, by way of example, time profiles of the temperature values 80, 88, 90, which were respectively recorded with the aid of the temperature sensors 58, 60 and 62 during operation of the machine tool 10. Based on these temperature profiles and using the deformation model 64 For example, the length changes 82, 84, 86 and displacements 92, 94 shown in FIG. 7 over their time course can be determined and linked to a thermally induced change in position 68 of the machine tool section 48.
- the displacement 82 due to the change in length of the machine tool section 48 is assumed in the negative z-direction, since the coupling point 30 is arranged offset relative to the z-axis in the positive z-direction to the center of the machine tool section 48. As a result, a length extension of the tool machine section 48 causes a shortening of the distance 93 between the workpiece carrier 16 and the tool carrier 18.
- the displacement 94 caused by the heat input of the heat source 56 is also assumed in the negative z direction, since the displacement 94 effects a shortening of the distance 93 between the workpiece carrier 16 and the tool carrier 18.
- the change in length 84 of the machine tool part 50 in the form of the position measuring device 34 is assumed in the positive z-direction.
- the change in length 86 of the machine tool part 52 and the displacement 92 due to the heat source 54 are assumed in the positive direction.
- FIG. 8 shows the change in position of the machine tool section 48 determined in this way over time.
- FIG. 8 also shows a real position change 102 detected during operation of the machine tool 10.
- the real change in position 102 of the machine tool section 48 can be measured, for example, with the aid of a laser interferometer.
- FIG. 8 also shows a curve 104 which indicates the difference between the real position change 102 measured in each case at a specific point in time and the position change 68 calculated for this point in time with the aid of the deformation mode 64.
- the real change in position 102 of the machine tool section 48 can reach values of more than 50 ⁇ m.
- the calculated position changes 68 only deviate from the real position changes 102 by a maximum of less than 10 ⁇ m.
- the drive device 26 of the machine tool section 48 can be actuated taking into account a position change reversed for this purpose. In this way, a thermally induced change in position of the machine tool section 48 can be at least largely compensated.
- the deviation between the calculated position change 68 and the real position change 102 results from the fact that 64 stationary states are assumed for the individual model elements 70 to 78 of the deformation model.
- a temperature value correlates linearly with a change in length and / or a displacement. In reality, such occurs Length change and / or displacement, however, with a time delay to a change in a temperature value, so that the real length changes and / or displacements are initially smaller than the length changes and / or displacements calculated using the model elements. It can be seen from FIG. 8 that in a steady-state thermal state of the machine tool 10, the calculated position changes 68 and the real position changes 102 approach each other to an identical value.
- the determination and compensation of the change in position 68 was explained by the example of the machine tool section 48, which can be moved along the z-axis of the machine tool 10, in the form of the workpiece carrier 16.
- a corresponding determination and compensation of changes in position can alternatively or additionally be carried out for the machine tool sections movable along the x-axis and / or the y-axis of the machine tool in the form of the tool carrier 18, the carriage 20 and / or the carriage 22.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710045592 DE102007045592A1 (en) | 2007-09-14 | 2007-09-14 | Method for determining a thermally induced change in position of a machine tool section of a machine tool |
PCT/EP2008/062006 WO2009037165A1 (en) | 2007-09-14 | 2008-09-10 | Method for determining a thermally induced change in position of a machine tool section of a machine tool |
Publications (1)
Publication Number | Publication Date |
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EP2195714A1 true EP2195714A1 (en) | 2010-06-16 |
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ID=40148629
Family Applications (1)
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EP08803973A Withdrawn EP2195714A1 (en) | 2007-09-14 | 2008-09-10 | Method for determining a thermally induced change in position of a machine tool section of a machine tool |
Country Status (3)
Country | Link |
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EP (1) | EP2195714A1 (en) |
DE (1) | DE102007045592A1 (en) |
WO (1) | WO2009037165A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102009054631A1 (en) | 2009-12-14 | 2011-06-16 | Deckel Maho Pfronten Gmbh | Method for determining thermally induced change in spatial position of machine tool section, involves comparing values of two spatial positions of machine tool sections, and determining thermally induced change in positions from comparison |
DE102010003303A1 (en) * | 2010-03-25 | 2011-09-29 | Deckel Maho Seebach Gmbh | Method and device for compensating a temperature-dependent change in position on a machine tool |
EP2711126B1 (en) * | 2011-05-17 | 2018-01-17 | JTEKT Corporation | Thermal displacement correction device and thermal displacement correction method |
DE102015115838B4 (en) | 2015-09-18 | 2021-12-16 | Grob-Werke Gmbh & Co. Kg | Processing machine, method for running in a processing machine, method for compensating for the temperature-related heat development in a processing machine |
JP6802208B2 (en) | 2018-03-23 | 2020-12-16 | ファナック株式会社 | Thermal displacement correction system and calculator |
WO2020132902A1 (en) * | 2018-12-25 | 2020-07-02 | 深圳配天智能技术研究院有限公司 | External control method for robot, robot, and external control system |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3792266B2 (en) | 1994-06-16 | 2006-07-05 | 森精機興産株式会社 | Method and apparatus for correcting thermal displacement of machine tool |
WO1997043703A1 (en) * | 1996-05-10 | 1997-11-20 | Automated Precision, Inc. | Real time machine tool error correction using global differential wet modeling |
US6269284B1 (en) * | 1997-05-09 | 2001-07-31 | Kam C. Lau | Real time machine tool error correction using global differential wet modeling |
KR100264247B1 (en) * | 1998-03-28 | 2000-08-16 | 김영삼 | Heat change error measuring system |
DE19848642A1 (en) * | 1998-10-22 | 2000-04-27 | Heidenhain Gmbh Dr Johannes | Temperature-dependent variation compensation method for machine tool or robot geometry corrects user input commands before conversion from input coordinate system into machine coordinate system |
JP3887197B2 (en) * | 2001-10-02 | 2007-02-28 | 株式会社森精機製作所 | NC machine tool correction device |
DE10312025A1 (en) * | 2003-03-18 | 2004-10-07 | Delta-X GmbH Ingenieurgesellschaft Gesellschaft für Strukturanalyse | Position control error compensation method for machine, involves compensation mechanism for deformations of processing machines with continuously measuring circuit utilized on basis of finite element method computation |
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2007
- 2007-09-14 DE DE200710045592 patent/DE102007045592A1/en not_active Ceased
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2008
- 2008-09-10 WO PCT/EP2008/062006 patent/WO2009037165A1/en active Application Filing
- 2008-09-10 EP EP08803973A patent/EP2195714A1/en not_active Withdrawn
Non-Patent Citations (1)
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Also Published As
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WO2009037165A1 (en) | 2009-03-26 |
DE102007045592A1 (en) | 2009-04-09 |
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