Gear grinding machine

Abstract

To provide a grinding machine for gear grinding which enables reliable production to close tolerances in industrial series production.SOLUTION: A grinding machine for gear grinding includes: a tool spindle (12) for holding a gear machining tool (14); a workpiece spindle (16) for holding a workpiece to be toothed; controlled machine axes for executing relative movements for chip-removing machining of the workpiece to be toothed by the gear machining tool; and a device (22) for applying a cooling fluid, which is set up to introduce the cooling fluid into a region of the chip removal between the gear machining tool and the workpiece to be toothed during the chip-removing machining operation. Therein at least one insulation device (24, 24') is provided in order to protect a load-bearing structure (26) and / or a component of the grinding machine (10) from a fluid flow and / or sparking.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The invention relates to a grinding machine for grinding gears, having a tool spindle for holding a gear machining tool, having a work spindle for holding a workpiece to be geared, having a plurality of controlled machine axes for performing relative movements for chip removal machining of the workpiece to be geared by the gear machining tool, and having a cooling fluid application device arranged to introduce a cooling fluid into a chip removal area between the gear machining tool and the workpiece to be geared during the chip removal machining operation. [Background technology]

[0002] Gear manufacturing typically involves the steps of soft machining, hardening, and hard finishing, which is often performed by grinding, such as generating or profile grinding.

[0003] Increasingly tighter tolerances are required when grinding gears. This trend is also observed, for example, in the continuous generating grinding of spur gears for electric mobility. Tolerances often specify production with deviations of the low single digit micrometer range. Such tight tolerances pose special challenges for machine builders in industrial series production. Even minor changes due to environmental influences such as temperature fluctuations, vibrations, etc. can result in the individual parts not meeting the specified tight tolerances during series production. Summary of the Invention [Problem to be solved by the invention]

[0004] Against this background, the invention is based on the technical problem of providing a grinding machine for gear grinding, which allows reliable production to close tolerances, in particular in industrial series production. [Means for solving the problem]

[0005] According to the invention, the above mentioned technical problem is solved by a grinding machine for gear grinding according to independent claim 1. Further designs of the invention result from the dependent claims and the following description.

[0006] According to the invention there is provided a grinding machine for grinding gears, comprising a tool spindle for accommodating a gear machining tool, a workpiece spindle for accommodating a workpiece to be geared, a plurality of controlled machine axes for performing relative movements for chip removal machining of the workpiece to be geared by the gear machining tool, and a cooling fluid application device arranged to introduce a cooling fluid into a chip removal area between the gear machining tool and the workpiece to be geared during the chip removal machining operation, characterized in that at least one thermal insulation device is provided to protect the load-bearing structures and / or components of the grinding machine from fluid flows and / or sparks.

[0007] Tests carried out by the applicant have shown that even small heat inputs or dissipations in individual areas of the grinding machine can result in loss of machine accuracy of a low single order of magnitude.

[0008] During gear grinding, a cooling fluid is typically introduced into the grinding contact to cool the workpiece and the tool, reduce friction, remove chips, and free the tool and workpiece from the chips. The cooling fluid absorbs heat from the components involved, i.e., the grinding contact between the workpiece and the tool, and therefore gradually heats up.

[0009] When the cooling fluid heated in this manner comes into contact with, for example, the machine bed of a grinding machine, heat can be transferred through the machine bed wetted with the cooling fluid to other components of the grinding machine connected to the machine bed, causing them to expand due to temperature.

[0010] This means that the heat input of the cooling fluid to the machine bed can cause thermal expansion of the machine shaft or the machine shaft holders, which can lead to loss of machine precision in the low micrometer range. Similarly, failure to wet the machine bed with the cooling fluid can lead to changes in the stable temperature state of the machine tool, for example temperature fluctuations due to the failure of the machine bed and associated components to be cooled during machining pauses, i.e. to heat the machine bed with the cooling fluid.

[0011] Furthermore, the temperature of the cooling fluid flowing towards the machine bed also varies during normal machine operation due to the fact that the cooling fluid is applied continuously during workpiece changes and that the cooling fluid is not heated by the grinding contact of the metal machining during workpiece changes. The continuous application of cooling fluid even during interruptions in machining acts to achieve a uniform cooling flow rate during grinding, which may not be guaranteed if the cooling flow rate is constantly switched on and off.

[0012] In this example, it therefore applies that not only the heat input from the cooling fluid but also the absence of such heat input and temperature changes during normal grinding operations can lead to variations in machine accuracy, since the actual heat input from the cooling fluid and the associated effects on the machine tool cannot always be planned for and taken into account or compensated for by the machine control system.

[0013] The proposed insulation device according to the invention now ensures that the load-bearing structures and / or components of the grinding machine are protected from the effects of such fluid flows, in this way the temperature of the load-bearing structures and / or components in question is kept as constant as possible. In particular, the insulation device according to the invention ensures that the relevant load-bearing structures and / or components of the grinding machine are thermally decoupled from the fluid flows. This applies equally to protection against sparks.

[0014] The above examples clearly show the requirements and influence of cooling fluids on the grinding process, however, environmental influences such as drafts or ventilation devices such as air conditioning systems can also lead to heat input to or dissipation from the load bearing structures, such as the machine bed mentioned above, and / or components of the grinding machine.

[0015] The term "fluid flow" in this case includes both examples of liquid flow in the form of cooling fluids as detailed above, and examples of gas flow such as ambient air. Thus, according to this specification, the term "fluid" includes, as usual, both liquids and gaseous substances or mixtures of gases such as ambient air, compressed air, etc.

[0016] The tool spindle may be configured to rotatably drive a gear machining tool, and the workpiece spindle may be configured to rotate a workpiece to be geared.

[0017] The apparatus for applying the cooling fluid may be configured to introduce the cooling fluid to the chip removal area between the gear machining tool and the workpiece during, before, and after machining.

[0018] The apparatus for applying the cooling fluid may include a pump that pressurizes the cooling fluid and causes it to be introduced under pressure into the chip removal area between the gear machining tool and the workpiece being cut.

[0019] When the term "grinder load-bearing structure" is used herein, it may refer to the machine bed of the grinder, or to load-bearing elements of the grinder, such as steel beams, columns, or similar structural parts. When referring to grinder components, this specification refers specifically to the movable shaft, parts of the movable shaft, drive devices, holders, clamping devices, spindle parts, etc.

[0020] It may be provided that the insulation device comprises a flat member, such as a sheet.

[0021] The sheet may comprise or consist of a metallic material.

[0022] It may be provided that the sheets are glued or coated with a material having low thermal conductivity, or glued by other processes such as vulcanization.

[0023] In this specification, when reference is made to a material having low thermal conductivity, the thermal conductivity measured in W / (m·K) is in particular less than 2 W / (m·K), more in particular less than 1 W / (m·K), which thermal conductivity is conventionally defined at 0° C.

[0024] According to one design of the grinding machine, it is provided that the flat components are located away from the load-bearing structures and / or components of the grinding machine to be protected. In this way, it may be avoided that heat transfer occurs due to a particularly flat contact between the flat components and the load-bearing structures and / or components to be protected. Insofar as the flat components are intended, for example, to keep the cooling fluid away from the load-bearing structures and / or components of the grinding machine to be protected, only the flat components are heated by contact with the cooling fluid, but this heat is not transferred by the flat components to the load-bearing structures and / or components of the grinding machine to be protected.

[0025] Thus, the flat components serve, inter alia, to thermally isolate the load-bearing structures and / or components of the grinding machine from the associated fluid flows.

[0026] It may be provided that an air gap is formed between the flat component and, at least in part, the load-bearing structure and / or the component to be protected, which serves to avoid or reduce heat transfer between the flat component and the load-bearing structure and / or the component to be protected, since the thermal conductivity of air is 0.024 W / (m*K) at 0° C.

[0027] Alternatively or additionally, it may be provided that an insulating material with low thermal conductivity, such as plastic, in particular cellular rubber, polystyrene, etc., may be arranged at least partially between the flat component and the load-bearing structure and / or component to be protected.

[0028] Such insulation has in particular a thermal conductivity of less than 1 W / (m*K) at 0°C, more in particular less than 0.5 W / (m*K) at 0°C, even more in particular less than 0.1 W / (m*K) at 0°C.

[0029] In particular, it may be provided that the area formed between the flat component and the load-bearing structure and / or component to be protected is completely filled with an insulating material with low thermal conductivity.

[0030] The flat components may be covered with a material that has poor thermal conductivity.

[0031] The material thickness, in particular the sheet thickness, of the flat components may be less than 5 mm, in particular less than 2 mm.

[0032] Alternatively or additionally, it may be provided that the length of the flat component may be greater than 10 cm, in particular greater than 20 cm.

[0033] Alternatively or additionally, it may be provided that the width of the flat component may be greater than 10 cm, in particular greater than 20 cm.

[0034] It may be provided that the material thickness of the abovementioned insulation is greater than 0.5 cm, in particular greater than 1 cm, in particular greater than 2 cm, in particular greater than 5 cm.

[0035] Alternatively or additionally, the length of the insulation may be greater than 10 cm, in particular greater than 20 cm.

[0036] Alternatively or additionally, it may be provided that the width of the flat component is greater than 10 cm, in particular greater than 20 cm.

[0037] It may be provided that the insulation is a plate-like component, i.e. made up, for example, of a plate-like substrate, or that the insulation is a mat-like component, i.e. made up, for example, of a mat-like substrate that can be wound into a roll.

[0038] According to one design of the grinding machine, it may be provided that the load-bearing structure to be protected is the machine bed of the grinding machine, and that, viewed from the vertical direction, the thermal insulation device is arranged between the device for discharging a cooling fluid and the machine bed, the thermal insulation device being in particular arranged in a machining space of the grinding machine which is closed during operation of the grinding machine and in which machining of the workpiece to be geared is performed by means of a gear machining tool.

[0039] During the grinding process, a cooling fluid is introduced into the grinding contact area between the tool or grinding tool and the workpiece being cut. The cooling fluid flows towards or collects in the area of ​​the machine bed and is usually discharged into a drain area, washed and reused in the cooling fluid circuit. A thermal insulation device is placed between the machine bed and the device discharging the cooling fluid to prevent the cooling fluid from directly contacting the machine bed.

[0040] It may be provided that the insulation device has a slope and is in particular configured to direct the cooling fluid towards the cooling fluid outlet or outlet. Horizontal or slightly inclined surfaces are areas where the cooling fluid can accumulate in large amounts. In these areas, there is no or very slow drainage and heat is transferred from the cooling fluid to the components wetted by the cooling fluid over a particularly long period of time. This is to be avoided by the above-mentioned slope, which is intended to promote faster drainage of the cooling fluid due to gravity.

[0041] The insulation device may be provided having seals against adjacent components or structures of the grinder in the area of ​​and / or at its edges of one or more attachment points to at least partially separate the area of ​​the grinder where fluid flow and / or sparks occur from the area where the load-bearing structures and / or components of the grinder to be protected are located.

[0042] The insulation device may be installed as a retrofit solution on an existing grinding machine, or the insulation device may already be included or engineered into the design of a new grinding machine.

[0043] It may be provided that the heat insulating device rests at least partially on the load bearing structures and / or components of the grinding machine to be protected. In the simplest case, for example, the load bearing structures and / or components of the grinding machine to be protected are thus covered with the heat insulating device in order to protect the structures and / or components in question from heat input. For example, the load bearing structures and / or components to be protected may be covered with foam rubber or other heat insulating material.

[0044] The above examples relate broadly to the inside of the grinding machine where the actual machining of the workpiece to be cut takes place, however, as already mentioned at the beginning, environmental influences outside the inside of the grinding machine can also lead to temperature fluctuations and affect the achievable machining accuracy in the single-digit micrometer range.

[0045] According to a further design of the grinding machine, in order to protect the load-bearing structures and / or components of the grinding machine from ambient air, in particular drafts, from the environment of the grinding machine, it may be provided that an insulating device is arranged outside the machining space or inside the grinding machine which is closed during operation of the grinding machine, and that the insulating device may in particular be an enclosure surrounding the load-bearing structures and / or components of the grinding machine to be protected on its outer periphery, which enclosure may in particular extend to the floor of the hall in which the grinding machine is set up and further in particular be sealed against the floor of the hall.

[0046] The features "load-bearing structure of the grinding machine" and "load-bearing structure of the grinding machine to be protected" are used interchangeably herein and each refer to one and the same feature.

[0047] The terms "grinder component" and "grinder component to be protected" are used interchangeably herein and each refer to one and the same feature. [Brief description of the drawings]

[0048] The invention is explained in more detail below with reference to drawings which show exemplary embodiments, the drawings being in each case diagrammatically. [Figure 1] FIG. 1 shows a grinding machine according to the present invention. [Diagram 2] FIG. 2 shows a heat insulating device for the grinding machine of FIG. [Diagram 3] FIG. 3 shows another insulating device. [Figure 4] FIG. 4 shows another insulating device. [Diagram 5] FIG. 5 shows another insulating device. [Figure 6] FIG. 6 shows the machine bed of the grinding machine of FIG. 1 with a thermal insulation device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0049] FIG. 1 shows a grinding machine 10 for grinding gears according to the present invention.

[0050] The grinding machine 10 has a tool spindle 12 for holding and driving a gear machining tool 14. In this embodiment, the gear machining tool 14 is a grinding worm.

[0051] The grinding machine 10 has a workpiece spindle 16 for holding a workpiece to be ground.

[0052] The grinding machine 10 has a number of controlled machine axes for performing relative motion for chip-removal machining of a workpiece being cut by a gear machining tool 14 .

[0053] The machine axes are labelled with letters and each of these letters is assigned an arrow representing the respective degree of freedom of movement of the corresponding machine axis. In the present embodiment, the grinding machine 10 has three linear axes X, Y, Z provided for the translational displacement of the tool spindle 12. The rotary drive of the gear machining tool 14 is labelled B1 and the pivot axis of the tool spindle 12 is labelled A1.

[0054] The axis B2 and the axis C3 are assigned to the rotational drive and the swinging motion of the dresser 18.

[0055] The rotation axis C1 controls the rotation of a workpiece to be geared during machining, which is not shown in FIG.

[0056] Furthermore, a linearly displaceable axis Z1 is provided, which is assigned to a sleeve 20 for clamping a toothed shaft or the like.

[0057] The grinding machine 10 has a device 22 for discharging a cooling fluid which is arranged to introduce the cooling fluid into the chip removal area between the gear machining tool 14 and the workpiece being cut during the chip removal machining operation.

[0058] In this embodiment, in order to protect a load-bearing structure 26 of the grinding machine 10 from fluid flows and / or sparks, the grinding machine 10 comprises an insulation device 24. In this embodiment, the insulation device 24 serves in particular to protect the load-bearing structure 26 from the cooling fluid discharged by the device 22. The insulation device 24 can be fixed, in particular to a cladding or a holder, for example, by screwing or adhesive.

[0059] Figure 2 shows, by way of example, a highly simplified and not-to-scale cross-section of the machine tool 10, in which the grinding of a workpiece 28 to be geared as shown in Figure 2 by the grinding worm 14 is shown. During the grinding operation, a cooling fluid 30 is introduced by the device 22 into the chip removal area between the workpiece 28 and the grinding worm 14.

[0060] The cooling fluid is discharged under pressure by a pump in the direction of the grinding worm 14. After contact between the workpiece 28 and the grinding worm 14, the cooling fluid 30 descends in a vertical direction V where it encounters the insulating device 24. The insulating device 24 is inclined and directs the cooling fluid 30 towards a cooling fluid outlet 35.

[0061] The thermal insulation device 24 prevents the cooling fluid 30, heated in the grinding contact, from impinging on the load-bearing structure 26, which in this embodiment is the machine bed of the grinding machine 10. The thermal insulation device 24 therefore ensures that the machine bed 26 is isolated, in particular thermally isolated, from the fluid flow of the cooling fluid 30.

[0062] This allows the cooling fluid 30 to prevent heat from being introduced into the machine bed 26, which could lead to heating of the components supporting the machine shaft or the components of the machine shaft itself, and potentially impair the manufacturing precision of the grinding machine 10 due to thermal expansion.

[0063] In this embodiment, the insulation device 24 comprises a flat component in the form of a sheet 32 ​​made of a metallic material. In this embodiment, the insulation device 24 has a distance A from the load-bearing structure 26 to be protected. In the region of the distance A, an air gap is formed, thereby forming an insulating air layer 42 between the insulation device 24 and the machine bed 26.

[0064] As can be seen from the illustration according to Fig. 2, the thermal insulation device 24 is arranged in the vertical direction V between the device 22 for applying the cooling fluid 30 and the load-bearing structure 26 to be protected. Furthermore, the thermal insulation device 24 is arranged in the machining space 36 of the grinding machine 10, which machining space 36 is closed during operation of the grinding machine 10. A corresponding protective housing of the grinding machine 10 is not shown in this embodiment for the sake of simplicity of illustration. However, it is known that grinding machines or machine tools or gear cutting machines generally have sliding or pivoting doors with protective enclosures in order to achieve a safe separation of the machine operation in the interior 36 from the environment U.

[0065] 3 shows a further exemplary and schematic design of an insulation device 24', in which, to avoid repetition, the same features have been assigned the same reference numbers and only the differences with respect to the above-mentioned example are described. The insulation device 24' also comprises a sheet 32. Furthermore, between the sheet 32 ​​to be protected and the machine bed 26, an insulation material 34 with low thermal conductivity is arranged.

[0066] For both exemplary embodiments described above, it applies that the material thickness D of the sheet or the sheet thickness D is less than 5 mm, in this example less than 2 mm, it also applies that the length L of the sheet is more than 10 cm and the width B of the sheet is more than 10 cm.

[0067] In the example shown in FIG. 3, the insulation device 24' rests on the load-bearing structure 26 of the grinding machine 10 to be protected.

[0068] FIG. 4 shows a further exemplary schematic design of an insulation device 24″, in which the same features have been assigned the same reference numbers to avoid repetition and only the differences from the above-mentioned examples are described.

[0069] The insulation device 24'' also comprises a sheet 32, in this example with a bonded insulation material 34. Furthermore, the insulation device has a distance A similar to that in FIG. 2, so that an air gap is formed between the insulation device 24 and the load-bearing structure 26. Furthermore, the insulation device 24 comprises a seal 38 in the end side region of the attachment to an adjacent component 40 of the grinding machine 10. The seal 38 can also be connected by adhesive.

[0070] 5 shows a further exemplary schematic design of an insulation device 24''', which in this example does not comprise a metal sheet, but only insulation material 34. In this example, an air gap is again provided, but according to alternative exemplary embodiments this can also be omitted.

[0071] The grinding machine 10 may have two or more insulation devices 24, 24', 24'', 24''' associated with the interior 36 of the grinding machine 10 to protect the machine bed 26 and / or other components of the grinding machine 10 from being wetted by the cooling fluid 30 and / or from sparks. FIG. 1 shows a further exemplary schematic design of an insulation device 24'''', which is arranged outside the machining space 36 of the grinding machine 10 and is closed during operation of the grinding machine 10 in order to protect the machine bed 26 of the grinding machine 10 from ambient air, in particular drafts, from the environment U of the grinding machine 10.

[0072] The insulation device 24'''' is an enclosure that circumferentially surrounds the machine bed 26 of the grinding machine 10 and extends to and is sealed against the floor H of the hall in which the grinding machine 10 is mounted.

[0073] FIG. 6 shows the machine bed 26 of the grinding machine 10, with the axial superstructure, i.e. the machine tower 44 with its associated machine axes and carrying the tool spindle 12 and the device 22 for discharging cooling fluid, as well as the corresponding axes and superstructure of the workpiece spindle 16 and sleeve 20, hidden to allow an unobstructed perspective view of the machine bed 26.

[0074] The machine bed 26 has guide rails 46 and mounting platforms 48 for holding the shaft assemblies previously described.

[0075] Fitted between these mounts 48 are six insulation devices 24. The insulation devices 24 are each shown with different hatching to visually distinguish them from adjacent components or areas of the machine bed.

[0076] For simplicity of illustration, all insulation devices are respectively given the reference number 24. Each of the insulation devices 24 shown in Fig. 6 may be designed according to one of the principles illustrated above with reference to Figs. 2-5. In other words, each of the insulation devices 24 shown in Fig. 6 may be designed according to one of the insulation devices 24, 24', 24'', 24'''. In other words, the machine bed may also be equipped with a combination of insulation devices 24, 24', 24'', 24''' of different types or different configurations.

[0077] 6, the insulation device 24 covers, inter alia, the areas of the machine bed 26 that are located between the mounting pedestals 48 and that would be exposed in the absence of corresponding covering by the insulation device 24. The insulation device 24 thus prevents the areas of the machine bed 26 that are located between the mounting pedestals 48 from being wetted by the cooling fluid during machine operation and from heat input or temperature variations due to the influence of the cooling fluid. [Explanation of symbols]

[0078] 10 Grinding machine 12 Tool spindle 14 Gear machining tools / grinding worm 16 Workpiece Spindle 18 Dresser 20 Sleeve 22 Cooling fluid discharge device 24 Insulation device 24' Insulation Device 24'' Insulation Device 24'' Insulation Device 24'' Insulation Device 26 Load-bearing structure / machine bed 28 Workpiece to be cut 30 Cooling fluid 32 sheets 34 Insulation 35 Cooling fluid outlet 36 Machining space 38 Seal 40 Components 42 Air Layer 44 Machine Tower 46 Guide Rail 48 Mounting stand X Machine axis Y Mechanical Axis Z machine axis A1 Machine Axis B1 Machine axis B2 Machine axis C1 machine axis C3 mechanical axis V Vertical A Distance H Hall Floor U Environment L Length B Width D Thickness

Claims

1. A grinding machine for grinding gears, comprising: a tool spindle (12) for holding a gear machining tool (14); A workpiece spindle (16) for holding a workpiece (28) to be geared, said gear machining tool (14) having a plurality of controlled machine axes performing relative movements for chip removal machining of said workpiece (28) to be geared, a device (22) for applying a cooling fluid (30), the device (22) being configured to introduce the cooling fluid (30) into a chip removal area between the gear machining tool (14) and the workpiece (28) being geared during the chip removal machining operation; At least one thermal insulation device (24, 24', 24'', 24''', 24'''') is provided to protect a load-bearing structure (26) and / or components of the grinding machine (10) from cooling fluids and / or sparks.

2. The insulation device (24, 24', 24'', 24'''', 24'''') includes a flat component (32), such as a sheet (32).

2. The grinding machine according to claim 1.

3. the flat component (32) is located at a distance (A) from the load-bearing structure and / or component of the grinding machine (10) to be protected; and / or the thermal insulation device (24, 24', 24'', 24''', 24'''') is located at a distance (A) from the load-bearing structures and / or components of the grinding machine (10) to be protected; 3. The grinding machine according to claim 2.

4. a gap is at least partially formed between the flat component (32) and the load-bearing structure (26) and / or component to be protected; and / or an insulating material (34) with low thermal conductivity, such as plastic, in particular cellular rubber, polystyrene, etc., is at least partially disposed between the flat component (32) and the load-bearing structure and / or component to be protected, 4. The grinding machine according to claim 3.

5. the material thickness (D) of said flat component (32), in particular the sheet thickness, is less than 5 mm, in particular less than 2 mm; and / or the length (L) of said flat component (32) is greater than 10 cm, in particular greater than 20 cm; and / or The width (B) of the flat component (32) is greater than 10 cm, in particular greater than 20 cm; The grinding machine according to any one of claims 2 to 4.

6. the load-bearing structure (26) being a machine bed of the grinding machine (10), and the heat insulating device (24, 24', 24'', 24''') being at least partially arranged, as viewed in the vertical direction (V), between the device (22) for discharging the cooling fluid (30) and the machine bed (26); said heat insulating device (24, 24', 24'', 24''') is in particular arranged in a machining space (36) of said grinding machine (10) which is closed during operation of said grinding machine and in which said machining of said workpiece (28) to be geared is carried out by said gear machining tool (14); The grinding machine according to any one of claims 1 to 5.

7. the thermal insulation device (24, 24', 24'', 24''') has a slope and is specifically configured to direct the cooling fluid to a cooling fluid outlet (35); The grinding machine according to any one of claims 1 to 6.

8. the thermal insulation device (24, 24', 24'', 24''') has a seal (38) in the area of ​​one or more attachment points and / or at its edges against adjacent components (40) or structures of the grinding machine (10) in order to at least partially separate the area of ​​the grinding machine (10) where the fluid flow and / or sparks are generated from the area where the load-bearing structure (26) and / or components of the grinding machine (10) to be protected are located, The grinding machine according to any one of claims 1 to 7.

9. the thermal insulation device (24, 24', 24'', 24''') rests at least partially on the load-bearing structure and / or components of the grinding machine to be protected; The grinding machine according to any one of claims 1 to 8.

10. said thermal insulation device (24'''') is arranged outside the machining space (36) of said grinding machine (10) and is closed during operation of said grinding machine, in order to protect said load-bearing structure (26) and / or components of said grinding machine (10) from drafts from the surrounding air, in particular from the environment (U) of said grinding machine, the thermal insulation device (24'''') is an enclosure which circumferentially surrounds the load-bearing structure (26) and / or components of the grinding machine (10) to be protected, in particular extending to and more particularly sealed against the floor (H) of the hall in which the grinding machine (10) is installed, The grinding machine according to any one of claims 1 to 9.

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