EP1350862A1 - Process and apparatus for thermally coating a surface - Google Patents

Abstract

The burner (2) is arranged in a workstation (14) to project the coating jet (P) horizontally. Actuators (40,45) orientate the workpiece (20) to keep the surface being coated at right angles to the coating jet. An Independent claim is included for the corresponding coating method.

Description

The invention relates to a device and a method for thermal Coating a surface of a workpiece and using a such a device or such a method for coating Inner surfaces, in particular cylinder running surfaces in cylinder bores Cylinder crankcase.

Thermal coating is a well-established method for targeted Remuneration or conditioning of surfaces. especially the thermal spraying processes such as arc spraying, flame spraying, High velocity oxy-fuel (HVOF) and Plasma spraying are methods that are used in many areas of industry today are used to produce high-quality coatings, for example as wear protection, thermal insulation or electrical Insulation layers. Plasma spraying plays a special role here too because it is due to the diversity of workable materials and the Reproducibility of the melting or coating process has enormous flexibility. Thus, the coating can optimally match the be adapted to the respective needs.

The development of new spraying technologies such as the rotative Plasma spraying opens up new coating processes Application areas. With rotary plasma spraying, the plasma torch is used rotates around an axis so that the plasma jet rotates on a circular path. This means that interior coatings can be excellently, that is Coatings of surfaces of an interior or inner surfaces of a workpiece.

A very important area of application is in the automotive industry Cylinder surface coating in the cylinder bores of the Cylinder crankcase of an internal combustion engine. This will be a rotating Plasma torch moves along the axis of the cylinder bore, so that on a coating is generated on the surface of the cylinder bore, which usually in a subsequent processing step, for example by honing. It has been shown to focus on this Wise coatings that have the high tribological Requirements on the cylinder liners in internal combustion engines are permanent have grown.

In the automotive industry, the need for lower prices Manufacturing costs in addition to inexpensive materials, if possible efficient and economical manufacturing methods are sought. in the With regard to the thermal coating of cylinder running surfaces Efforts have been made to bring this process to the industrial Make mass production operational. In WO-A-00/37703, for example, a processing station for thermal coating disclosed by cylinder running surfaces in the form of a continuous system, in which the cylinder crankcase from one transport route through several Processing sections are transported, being in one of these Sections the thermal coating is done.

An object of the invention is to provide an apparatus and a method for provide thermal coating, which is a more efficient and more economical coating of surfaces, especially cylinder surfaces in cylinder crankcases. The method and the device are also intended in particular for use in industrial Be suitable for mass production.

This task in terms of apparatus and process engineering Solving objects of the invention are characterized by the features of marked independent claim of the respective category.

A device for thermal coating is therefore in accordance with the invention proposed a surface of a workpiece with a torch Generating a coating jet, with the burner in one Processing station is arranged so that the coating jet in the extends essentially perpendicular to the perpendicular direction, as well as with adjusting means, which align the workpiece so that the surface to be coated perpendicular to the coating jet during the coating process stands.

It has been shown that it is particularly good and even Let coatings achieve if the surface to be coated during of the coating process is vertical. The adjustment means that Workpiece aligned so that the surface to be coated is perpendicular to the coating jet. Since the coating jet in the spreads essentially perpendicular to the perpendicular direction, is consequently the Coating surface aligned vertically.

The advantage of the adjustment means, especially with regard to the industrial mass production with a high degree of automation results, is the example of the coating of the cylinder treads Cylinder crankcase for a V-engine clearly. Should be the one to be coated The surface must always be aligned vertically, as is the case with known devices (Continuous systems) necessary, the cylinder crankcase in two To coat runs. First, the cylinder crankcase are placed on the transport route by suitable measures, that the first row of cylinder bores is right for coating is aligned. After the first pass, in which only a series of Holes is coated, the cylinder crankcase on the Transport route be repositioned so that the axes of symmetry of the second row of cylinder bores properly oriented for coating is. Only then will the second row of Coated cylinder bores.

The device according to the invention now enables such workpieces in one run, possibly without manual intervention, that is automated to coat. First, the adjustment means Workpiece aligned so that the first row of cylinder bores with its Axis of symmetry is vertical, these cylinder bores are coated, then the adjustment means position the workpiece so that the second row of cylinder bores with their axes of symmetry is perpendicular. consequently can all cylinder bores of the cylinder crankcase of a V-engine can be coated in just one pass. Already this example demonstrates that the invention is a significantly more efficient and enables more economical coating.

With regard to industrial application, it is advantageous if the Device is provided with a transport system which the workpiece transported to the processing station and there into a processing position brings.

In a first embodiment, the adjustment means comprise one Adjustment device with which the transport system at least in the area the processing station can be tilted and / or pivoted. So that can Transport system including the workpiece located and fixed on it be aligned so that the surface to be coated is perpendicular to the Coating jet stands.

According to a second embodiment is on the transport system a holder is provided for receiving the workpiece, with which Bracket the workpiece tiltable and / or pivotable with respect to Transport system is.

In a third embodiment, the adjustment means comprise one Positioning device with which the workpiece in the machining station can be gripped, aligned and held during coating. This positioning device can be a manipulator, for example Gripping arm or a robot.

In a fourth embodiment, one is used as the adjusting means Lifting device is provided with which the workpiece at least can be partially lifted off the transport system. So the workpiece is defined tiltable relative to the transport system.

An advantageous measure consists of at least two burners to coat two surfaces at the same time. This allows Depending on the application, increase the efficiency of the device because the total Processing time reduced.

The torch is preferably a plasma torch because the plasma spraying in the Is extremely flexible with regard to the materials that can be processed and the Reproducibility of the coating is guaranteed. In terms of preferred use for interior coatings, especially the The coating of cylinder running surfaces is or are the burner (s) each rotatable plasma torch.

Of course, the adjustment means of these embodiments can also can be combined with each other.

In the method according to the invention for thermal coating of a Surface of a workpiece, a coating jet is used with a torch generated that extends substantially perpendicular to the solder direction and that The workpiece is positioned with adjustable adjustment means so that the coating surface during the coating process the coating jet.

A preferred use of the device according to the invention or the The method according to the invention is the coating of inner surfaces, in particular cylinder running surfaces in cylinder bores Cylinder crankcase, especially a cylinder crankcase that has at least two cylinder bores, the longitudinal axes of which are not are parallel to each other.

Fig. 1:

eine schematische Darstellung wesentlicher Komponenten einer Durchlaufanlage zum thermischen Beschichten,

Fig. 2:

ein Zylinderkurbelgehäuse eines VR-Motors,

Fig.3:

ein Zylinderkurbelgehäuse eines V-Motors,

Fig. 4:

ein Zylinderkurbelgehäuse eines W-Motors,

Fig. 5:

die Ausrichtung eines Zylinderkurbelgehäuses beim Beschichten einer ersten Reihe von Zylinderbohrungen,

Fig.6:

die Ausrichtung des Zylinderkurbelgehäuses aus Fig. 5 bei der Beschichtung einer zweiten Reihe von Zylinderbohrungen,

Fig. 7:

ein erstes Ausführungsbeispiel einer erfindungsgemässen Vorrichtung,

Fig. 8:

ein zweites Ausführungsbeispiel einer erfindungsgemässen Vorrichtung,

Fig. 9:

ein drittes Ausführugnsbeispiel einer erfindungsgemässen Vorrichtung, und

Fig. 10, 11:

Darstellungen zur Veranschaulichung eines vierten Ausführungsbeispiels einer erfindungsgemässen Vorrichtung.

In the following, the invention is explained both in terms of apparatus and in terms of process technology using exemplary embodiments and using the drawing. In the schematic drawing show:

Fig. 1:

1 shows a schematic illustration of essential components of a continuous system for thermal coating,

Fig. 2:

a cylinder crankcase of a VR engine,

Figure 3:

a cylinder crankcase of a V-engine,

Fig. 4:

a cylinder crankcase of a W engine,

Fig. 5:

the alignment of a cylinder crankcase when coating a first row of cylinder bores,

Figure 6:

5 the orientation of the cylinder crankcase from FIG. 5 when coating a second row of cylinder bores,

Fig. 7:

a first embodiment of a device according to the invention,

Fig. 8:

a second embodiment of a device according to the invention,

Fig. 9:

a third exemplary embodiment of a device according to the invention, and

10, 11:

Representations to illustrate a fourth exemplary embodiment of a device according to the invention.

The invention is based on those that are particularly relevant in practice Application explains that the workpiece to be coated is the Cylinder crankcase of an internal combustion engine for one Passenger car is. The surfaces to be coated are Cylinder running surfaces in the cylinder bores. So there are inner surfaces coated. However, it is to be understood that the invention is not limited to that Coating of cylinder running surfaces is limited, but in analogy the same way for the thermal coating of other inner surfaces or surfaces of an interior and / or the thermal coating of External surfaces and surfaces are generally suitable and advantageous can be used. Coatings from Combustion chambers for aircraft engines, transition pieces for industrial stationary gas turbines or the internal coating for connecting rod bearings.

Furthermore, the preferred embodiment is of exemplary character Reference that the thermal coating by means of plasma spraying he follows. This method is well known per se and therefore requires it no further explanation here. Of course, the invention is suitable in similarly also for other thermal processes Coating, such as arc spraying or HVOF spraying.

1 shows essential parts of a in a highly schematic representation in total designated with the reference numeral 10 for thermal coating of cylinder liners in cylinder bores 22 in a cylinder crankcase serving as workpiece 20. The Continuous plant 10 comprises several processing stations 11, 12, 13, 14, 15, through which the workpiece 20 to be coated by means of a Transport system 16, for example as a conveyor belt or roller conveyor is designed, transported.

The workpiece 20 is, as indicated by the arrow E in Fig. 1, the Continuous feed system. The transport system 20 conveys the workpiece 20 first in a preparation station 11. Here it is Cylinder crankcase 20 masked. A mask, not shown, is more suitable Design is applied to the workpiece 20 and protects during the further machining areas of the cylinder crankcase that are not to be coated, for example the surfaces in which the Cylinder bores are provided on the cylinder head surfaces.

In the following processing station 12, the ones to be coated are Surfaces, for example, by sandblasting onto the thermal coating prepared.

The workpiece 20 then passes through a cleaning station 13, in which is an intensive cleaning. Sand residue from the Processing station 12, as well as possibly still existing Dirt particles are removed.

The thermal coating then takes place in the processing station 14. On rotating plasma torch is in the cylinder bore to be coated retracted. The coating beam generated by the plasma torch rotates around the longitudinal axis of the cylinder bore. By moving the The coating jet describes the burner in the direction of the longitudinal axis a helix and so coats the inner wall of the Cylinder bore 22.

After coating, the workpiece 20 passes through a cooling station 15.

The workpiece 20 can then be processed in a manner known per se be, e.g. B. Removing the mask, reworking the cylinder surface by honing or similar processes, etc.

In the schematic representation of FIG. 1, such components are as the supply and discharge lines for process gases, extraction devices, drives, Connecting lines, electrical supply devices, Control devices not for reasons of better clarity shown. Only for the processing station 14, in which the thermal Coating takes place, a control and control unit 17 is indicated.

The invention relates primarily to the processing station 14, in which the thermal coating takes place. Before this is explained in more detail, 2-4 different designs of cylinder crankcases for Internal combustion engines are explained, for which the invention is particularly suitable.

Fig. 2 shows the cylinder crankcase for a VR engine, which here as a five-cylinder engine, is designed with five cylinder bores 22. each Cylinder bore 22 is delimited by an area, the respective one Cylinder running surface 23, along which the piston moves during operation. This Cylinder running surfaces 23 are thermally coated. In which VR engine cylinder crankcase 20 are all cylinder bores 22 in arranged a common cylinder head surface 21, however, extend not perpendicular, but at an angle to the cylinder head surface 21. There are two Rows of cylinder bores 22, namely the one on the right as shown Row with two holes and the row on the left with three Holes. The orientation of the cylinder bores 22 can be determined by their Longitudinal axis A1, A2 describe the axis of symmetry of the bore represents. The longitudinal axes A1 or A2 of the holes that belong to the same row belong, run parallel to each other. The longitudinal axes are A1 inclined with respect to the longitudinal axes A2. The longitudinal axes A1 and A2 include, for example, an angle of 15 degrees. Regarding one Normal N, which is perpendicular to the cylinder head surface 21, run the Longitudinal axes A1 and A2 symmetrical, that is, the longitudinal axis A1 of the The first row closes the same angle with the normal in terms of amount N a like the longitudinal axis A2 of the second row.

Fig. 3 shows the cylinder crankcase 20 of a V-engine, which here as a six-cylinder engine is designed. There are two rows of cylinder bores 22 provided, which form a V-arrangement. In contrast to the VR engine are two inclined cylinder head surfaces 211 and 212 provided. The longitudinal axes A1 of the first row of Cylinder bores 22 are each perpendicular to the first Cylinder head surface 211 and the longitudinal axes A2 of the second row of Cylinder bores 22 are each perpendicular to the second Cylinder head surface 212.

Fig. 4 shows the cylinder crankcase 22 of a W engine, which here as a twelve-cylinder engine is designed. There are four rows of three each Cylinder bores 22 are provided. Similar to the V-engine are also with the W motor two mutually inclined cylinder head surfaces 211 and 212 provided, however, with the W engine in each cylinder head surface 211 or 212 two rows of cylinder bores 22 are provided. Within one The longitudinal axes A1, A2, A3 and A4 each run parallel in a row to each other. The longitudinal axes A1-A4 are inclined to each other in pairs, that in general, none of the axes A1 to A4 runs parallel to one other of the axes A1 to A4.

Common to the cylinder crankcases 20 illustrated in FIGS. 2-4 is that that each of these cylinder crankcases 20 has at least two rows of Has cylinder bores 22, the longitudinal axes A1 of the Cylinder bores 22 of the first row are not parallel but inclined to the Longitudinal axes A2 of the cylinder bores 22 of the second row run.

With thermal coating, especially with plasma spraying rotating plasma torch, it has proven to be beneficial to the to orient the coating surface vertically, because then a special one uniform layer application can be realized. For the coating of the cylinder running surfaces 23, this means that during the coating the Longitudinal axis A1, A2, A3 and A4 should be perpendicular.

According to the invention, it is now proposed to provide adjustment means Align the workpiece 20 so that the surface to be coated is perpendicular stands.

"Plumb right" or "plumb direction" denotes, as is common practice, the Direction in which gravity acts. As part of this registration, a Surface or a surface element as "vertically aligned" or "perpendicular oriented "if the surface normal vector of this surface or this surface element is perpendicular to the vertical direction. In the event of of the cylinder bores 22 or the cylinder running surface 23, this means that the axis of symmetry, i.e. the longitudinal axis A1, A2, A3, A4 of the cylinder bore 22 is aligned vertically.

The principle of the method according to the invention or the The device according to the invention is illustrated in FIGS. 5 and 6 clear. Fig. 5 shows the workpiece 20, here the cylinder crankcase one VR motors (as shown in Fig. 2) in the processing station 14, in which the thermal coating takes place. It is a burner 2 for generating one Coating jet provided, symbolically by the arrow P is pictured. The burner 2 is designed as a rotatable plasma torch and comprises a rod 3 which extends in the direction of the longitudinal axis B of the Brenners 2 extends. At the bottom of the rod as shown a nozzle 4 is provided from which the coating jet P emerges. The Nozzle 4 is arranged such that the coating jet P is perpendicular to the Longitudinal axis B of the burner emerges. The burner 2 is in the Processing station 14 arranged so that its longitudinal axis B perpendicular runs. As a result, the coating jet P is substantially perpendicular to the Plumb direction.

The workpiece 20 in the processing station 14 aligned so that the to be coated Surface, here the cylinder surface 23, during the coating process is aligned perpendicular to the coating jet P and thus perpendicular.

In the position shown in FIG. 5, the workpiece 20 is oriented so that that the longitudinal axis A2 of the left row of Cylinder bores 22 perpendicular and thus parallel or congruent with the Longitudinal axis B of burner 2 extends. The cylinder crankcase 20 is thus tilted by an angle α1 which corresponds to the angle between the normal N Cylinder head surface 21 and the longitudinal axis A2 corresponds. So it is due coating cylinder barrel surface 23 perpendicular. When coating, the rotates Coating jet around the longitudinal axis B of the burner 2. By linear Moving the burner 2 or the rod 3 is then achieved that the Coating jet B following a helical line the entire Cylinder running surface 23 coated, it is always ensured that the to coating surface is perpendicular to the coating jet P and is aligned vertically.

After all cylinder bores 22 of the left side as shown are coated, the cylinder crankcase 20 by means of the adjusting means brought into the position shown in Fig. 6. Now the cylinder bores 22 of the row on the right as shown, that is, the Longitudinal axis A1 is parallel or congruent with the longitudinal axis B of the Brenner 2. The normal N of the cylinder head surface 21 is at an angle α2 tilted against the longitudinal axis B of the burner, that means The cylinder crankcase 22 was tilted by the angle α1 + α2 (In general, in the case of a VR motor, α1 is α2 in amount). In the The orientation shown in FIG. 6 can therefore be the one on the right Row of cylinder bores 22 are coated, ensuring that that during the coating the cylinder running surface 23 to be coated is always aligned vertically and essentially perpendicular to Coating jet is hit.

The invention offers in particular with regard to the automated Mass production a very significant increase in efficiency and Improve economy. The cylinder bores from Cylinder crankcases of all engine types, especially that of VR, V and W engines can be automated in a single pass be coated. It is no longer necessary, two or in the case of the W engine four runs through the continuous system to complete all Coating cylinder bores.

Various exemplary embodiments of the The device according to the invention and in particular the adjustment means explained.

Fig. 7 shows a first embodiment of an inventive Contraption. In this embodiment, the adjustment means comprise one Adjustment device 40, with which the entire transport system 16 in Area of the processing station 14 is tiltable or pivotable. The Adjustment device 40 comprises a stationary bearing shell 41, which is spherical is curved. A holder 42 is guided in this bearing shell 41. At the Bracket 42, the transport system 16 is fixed. The transport system 16 is here designed as a roller conveyor with rollers 161. The workpiece 20 is by means of Brackets 162 fixed on the transport system 16. It also says Workpiece 20 in operative connection with a suction device 50 which during coating gas and excess coating material sucks. In this embodiment, the entire transportation system 16 tilted in the area of the coating station 14 by the holder 42 in the bearing shell 41 is moved until the workpiece is correctly aligned. Then the holder 42 is fixed with respect to the bearing shell 41.

For coating, the cylinder crankcase 20 is in the Processing station 14 retracted, on the transport system 16 - if necessary - fixed by means of the clamps 162 and the suction device 50 is positioned. Now the whole of the transport system 16, workpiece 20 including masking and suction device 50 by means of the Adjustment device 40 tilted so that the first row of Cylinder bores 22 is aligned perpendicularly. This series is created using the Burner 2 coated. Then the entirety is around the angle tilted, which is necessary to the second row of cylinder bores 22nd to align vertically. After all the cylinder bores 22 are coated, the cylinder crankcase 20 is in its normal position brought and can be transferred to the next station.

In a second embodiment, which is shown in FIG the transport system 16 mounted stationary. There is one on the transport system Bracket 45 is provided, with which the workpiece can be tilted and / or is pivotally mounted with respect to the transport system 16. The bracket 45 is designed, for example, as an adapter pallet, the angle of Adapter range is adjustable so that the bottom of the workpiece 20 is relative tiltable or pivotable to the surface of the transport system 16 is. The workpiece 20 arrives for processing on the as an adapter pallet designed bracket 45 in the processing station 14 and is there positioned. Then the suction device 50 is preferably automatically adapted to the workpiece 20. If necessary, the masking (Mask) adjusted. Now the workpiece 20 including masking and Suction device 50 tilted until the surface to be coated is perpendicular. After the first row of cylinder bores is coated, that will be Workpiece 20 including masking and connected suction device 50 tilted until the next row of cylinder bores 22 is aligned vertically is and can be coated. After doing this all Cyclinder bores 22 are coated, the cylinder crankcase 20 brought into its normal position and can be transferred to the next station become.

Fig. 9 shows a third embodiment. In this, the include Adjustment means a positioning device 60 with which the workpiece 20 in the processing station 14 gripped, aligned and during the Coating can be kept. The positioning device 60 is as flexible handling system, for example with a controllable one Gripping arm or designed as a robot unit. The positioning device 60 grips the workpiece 20 in the processing station 14 and aligns it so that the surface to be coated is vertical. After the first row The cylinder 20 is coated, the workpiece 20 is included Masking and connected suction device 50 tilted until the next row of cylinder bores 22 is aligned and coated can be. After all the cylinder bores 22 are coated, the positioning device provides the cylinder crankcase 20 in its normal position on the transport system 16 that the workpiece 20 transported further.

10 and 11 show a fourth embodiment in which the Adjustment means comprise a lifting device 70 with which the Workpiece 20 can be at least partially lifted off the transport system 16. 10 shows the workpiece that is on the rollers 161 of the transport system 16 stands in the processing station 14. As shown below the roles 161 of the transport system, the lifting device 70 is provided, which comprises an inclined lifting element 71. As soon as the workpiece 20 is positioned below the burner 2, the lifting element 71 is between the rollers 161 of the transport system moves up and brings through its oblique course the workpiece 20 in a tilted position, which in Fig. 11 is shown. As a result, the workpiece 20 can be aligned such that the coating cylinder barrel is perpendicular. For coating the second one Series of cylinder bores, different variants can be provided his. For example, it is possible to adjust the lifting element 71 embody. For example, the lifting element 71 can be mounted that either its right side as shown or its left side can be raised as shown.

Another variant consists of two lifting devices 70 provide the one behind the other and mirror images of each other are. The workpiece 20 is then first over the first Lifting device 70 positioned and tilted by means of it that the first row of cylinder bores is perpendicular. After coating this row, the workpiece 20 is placed over the second lifting device 70 positioned, which tilts the workpiece 20 in the reverse direction, so that now the second row of cylinder bores can be coated.

The invention therefore makes it possible to have all the cylinder bores any cylinder crankcase of an internal combustion engine in just one To coat the processing pass in a continuous system.

In particular, this is also possible with such cylinder crankcases that have different bore angles, e.g. B. in VR, V or W engines. This means especially with regard to the industrial Mass production and large-scale production are considerable Increased efficiency and a reduction in production costs.

Measures will now be explained that are analogously the same Way apply to all embodiments.

The vertical alignment of the surface to be coated according to the invention is preferably carried out automatically. Depending on the orientation of the surface to be coated, the necessary tilting or
Rotations of the workpiece 20 are entered or programmed, for example into the control and monitoring device 17. After the workpiece 20 has entered the processing station, the workpiece 20 is then automatically brought into the correct orientation by means of the adjusting means 20 or successively brought into the different coating position.

To monitor the correct alignment of the workpiece Sensors, for example optical ones, can be provided.

It is also possible to have two or more, provide burners 2 which can be operated in parallel. This allows simultaneous coat two or more surfaces. In the case of the coating of Cylinder bores in the cylinder crankcase are at the same time Coating preferably two non-adjacent holes simultaneously coated to prevent excessive local heating, especially in the usually thin walls between adjacent holes avoid.

As already mentioned, the invention is of course also for the coating other surfaces than cylinder surfaces in cylinder crankcases. Depending on the geometry of the surface, it is also possible to choose the surface to be coated Track surface during coating. For example, if it is too coating surface in the direction of the longitudinal axis B of the burner 2 curved, so their orientation or alignment can automatically during of the coating process are changed so that the straight to coating area of the surface is aligned vertically.

Claims (10)

Device for the thermal coating of a surface of a Workpiece (20) with a burner (2) for generating a Coating jet (P), the burner (2) in one Processing station (14) is arranged so that the Coating jet (P) essentially perpendicular to the perpendicular direction extends, as well as with adjusting means (40; 45; 60; 70) which the workpiece Align (20) so that the surface to be coated during the Coating process perpendicular to the coating jet (P) stands. Apparatus according to claim 1 with a transport system (16) which the workpiece (20) is transported to the processing station (14) and there in a processing position. Apparatus according to claim 1 or 2, wherein the adjusting means Adjustment device (40) with which the transport system (16) can be tilted at least in the area of the processing station (14) and / or is pivotable. Device according to one of the preceding claims, wherein on the Transport system a holder (45) for receiving the workpiece (20) is provided with which holder (45) the workpiece (20) is tiltable and / or pivotable with respect to the transport system (16). Device according to one of the preceding claims with a Positioning device (60) with which the workpiece (14) in the Processing station (14) gripped, aligned and during the Coating can be kept. Device according to one of the preceding claims with a Lifting device (70) with which the workpiece (20) at least can be partially lifted off the transport system (16). Device according to one of the preceding claims, wherein at least two burners (2) are provided to cover two surfaces to coat at the same time. Device according to one of the preceding claims, in which the burner (2) is a plasma torch, in particular a rotatable one Plasma torch, is Process for the thermal coating of a surface of a workpiece (20), a coating jet (P) being generated with a burner (2) which extends substantially perpendicular to the perpendicular direction and the workpiece (20) having adjustable adjustment means (40; 45; 60; 70) is positioned so that the surface to be coated during the Coating process perpendicular to the coating jet (P) stands. Use of a device according to one of claims 1-8 or a method according to claim 9 for coating inner surfaces, in particular cylinder running surfaces (23) in cylinder bores (22) of a Cylinder crankcase (20), especially a cylinder crankcase, which has at least two cylinder bores (22), the Longitudinal axes (A1, A2, A3, A4) are not parallel to each other.

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