DE102009014098A1 - Device for masking an area of a surface of a component that is not to be coated in a coating process, comprises a mask for covering the area, and a magnet arrangement for holding the mask on the surface of the component - Google Patents

Abstract

The masking device comprises a mask (20) for covering an area of a surface (12) of a component (10), and a magnet arrangement (30) for holding the mask on the surface of the component. The magnet arrangement is partially imbedded in the mask and is connected by a barb, a latching member or a screw joint or clamping with the mask. The mask has a first side that is arranged on the surface of the component, and a second side that is turned away from the surface of the component. The magnet arrangement is arranged to the second side of the mask. The masking device comprises a mask (20) for covering an area of a surface (12) of a component (10), and a magnet arrangement (30) for holding the mask on the surface of the component. The magnet arrangement is partially imbedded in the mask and is connected by a barb, a latching member or a screw joint or clamping with the mask. The mask has a first side that is arranged on the surface of the component, and a second side that is turned away from the surface of the component. The magnet arrangement is arranged to the second side of the mask. The mask and the magnet arrangement have a magnetizable or magnetized material. The mask and the magnet arrangement are arranged on opposite sides of the component in order to fix the mask through clamping the component between the mask and the magnet arrangement. Independent claims are included for: (1) a method for masking an area of a surface of a component; (2) a method for removing a masking device with a magnet arrangement and a mask; (3) a method for coating a surface of a component; and (4) a magnet arrangement for a masking device.

Description

The The present invention relates to a masking device and a method of masking a portion of a surface of a component, in a coating process, especially in the thermal Spraying, not to coat.

The Coating of surfaces of components is common in many areas of engineering. there There are often one or more areas of the surface that not to be coated. Examples are grooves, blind holes and Thread. These areas not to be coated can be used during the Coating process are masked. As masks, for example tapes or silicone pads used. Often the liability of conventional masking on surfaces of components, however, is insufficient to withstand the stresses during the coating process to survive. To the coating processes, the special requirements of the Provide adhesion of a mask to a surface of a component, counting thermal spraying, for example, cold-kinetic compaction (also known as K3 coating). Due to the high kinetic energy the on the surface of the Component and on the mask incident particles and optionally Also, a gas stream used, a mask can be moved from the surface Part of the component partially or completely detached and even from wells forced out become.

A Object of the present invention is an improved Masking device, improved methods of masking and for removing a masking device as well as an improved Magnetic device for to provide a masking device.

These Task is governed by the objects of independent claims solved.

further developments are in the dependent claims specified.

Various embodiments The present invention is based on the idea of masking a Area of a surface of a component that is not to be coated during a coating process a masking device with a mask for covering the not to be coated area and a magnetic device for holding the Mask on the surface to create the component.

Of the The area to be coated can have any desired shape and, for example, be concave or convex. The masking device is especially for a masking when applying a K3 coating or other thermal Spray method usable. The mask can be silicone, a metal or another elastically or plastically deformable material, in particular a have ductile material. The magnetic device can be in the mask embedded and / or by means of a barb, a latch, a screw or a clamp connected to the mask be.

The Mask can be a first page, which is intended to be on the surface of a Component to be arranged, and a second side, which provided is, from the surface of the To be arranged facing away from component. In this case For example, the magnetic device can be arranged on the second side of the mask be to the mask by clamping between the magnet device and to fix the component.

If the mask itself has a permanent magnetic material, the Mask and the magnetic device to be identical.

The Magnetic device includes, for example, a permanent magnet or an electromagnet with a power source or an electromagnet, which is connectable to an electrical energy source. If that Component itself a magnetizable, especially paramagnetic or ferromagnetic material or an already magnetised, In particular, having permanent magnetic material, the Mask and the magnetic device of the masking device immediately connected to each other at the area of the surface to be masked Be arranged component. In this case, the mask is for example as described above by means of a barb, a latch, a screw or a clamp with the magnetic device connected and / or by clamping between the magnetic device and fixed to the component.

If the mask itself is a magnetizable material, in particular a paramagnetic or ferromagnetic material or an already has magnetized, in particular permanent magnetic material, For example, the magnetic device may be at a portion to be masked opposite and from the side of the component facing away from the area to be masked to be ordered. The mask is then clamped by the component between the mask and the magnet device, which is magnetic tighten, fixed to the component. In this case, the component can be any Have materials, in particular diamagnetic or not magnetizable materials. The same applies if at least either the mask or the magnet device an electromagnet exhibit.

at a method for masking a portion of a surface of a Component, which does not coat during a coating process is, the non-coated area are covered with a mask and attached the mask by means of a magnetic device to the component.

at this method, a masking device can be used, as described above. In particular, the mask can through fixed a clamp between the magnetic device and the component become. Alternatively, the mask by a clamping of the component be fixed between the mask and the magnet device.

The Magnetic device and - before especially in the case of the arrangement of the mask and the magnet device at opposite Sides of the component also the mask - can be an already magnetized, in particular having permanent magnetic material. Alternatively, at least either the magnetic device or the mask or the component by means magnetized magnetizing device. The magnetization device will follow removed while the mask and the magnet device remain on the component.

To the Removing a masking device as described above was, a magnetic field can be generated, which is a magnetic Attraction between the magnetic device and the component or between the magnetic device and the mask reduces. At the same time or subsequently, the Magnetic device and the mask are removed from the component.

ever according to the materials of the component and the mask and the coating process, for the the masking is provided have the masking devices described above and the masking and removal methods described above a masking device has a number of advantages. To counts that the mask by means of the integrated or connected to it Magnet device can be very firmly connected to the component. Slipping or falling of the mask from the uncoated Area of the surface can thus also with strong physical and / or chemical load be avoided by the coating process. The mask itself can be made robust, in particular sufficiently thick or sufficiently stiff. Unlike when using an adhesive tape or Other glued masks can not have any glue on the surface of the mask Component remain behind. Furthermore, the mask can be readily removed from the component at any time become.

Brief description of the figures

following Embodiments are based the attached Figures closer explained. Show it:

1 a schematic representation of a component;

2 a schematic representation of a component with a masking device;

3 a schematic representation of a masking device;

4 a schematic representation of a masking device;

5 a schematic representation of a masking device;

6 a schematic representation of a masking device;

7 a schematic representation of a masking device;

8th a schematic representation of a masking device;

9 a schematic representation of a masking device;

10 a schematic representation of a masking device;

11 a schematic representation of a masking device;

12 a schematic representation of a masking device;

13 a schematic flow diagram of a method for coating.

Description of the embodiments

The 1 to 12 show schematic representations of a component 10 and / or a masking device 20 . 30 . 40 , The 1 to 12 each show a section perpendicular to a surface 12 of the component 10 at which the masking device 20 . 30 . 40 during a coating process should mask an area not to be coated. As far as the component 10 in the 1 to 12 is shown, it has a rectangular cross section in the illustrated sectional plane. Deviating from this, the component 10 have any cross-section and any three-dimensional shape. In particular, the upper area 12 of the component 17 not only flat, but also be convex and / or concave. The following with reference to the 1 to 12 illustrated masking devices 20 . 30 . 40 and the following with reference to 13 For example, illustrated methods are useful in coating stator blades, rotor blades and other parts and components of axial compressors or turbines for aircraft engines or other mobile or stationary applications.

1 shows a schematic representation of a component 10 with a surface 12 in which a blind hole 14 is arranged. The surface 12 of the component 10 should be coated in a coating process, for example by cold-kinetic compaction or another thermal spraying process. The inner, predominantly concave surface 16 the blind hole 14 should not be coated in this example, for example, the exact dimensions and shape of the blind hole 14 not to change.

2 shows a schematic representation of the above based on the 1 represented component 10 with the blind hole 14 and a masking device 20 . 30 for masking the blind hole 14 during a coating process. The masking device has a mask 20 and one in the mask 20 embedded magnet device 30 on.

The mask 20 may comprise a predominantly plastically deformable or a predominantly elastically deformable material, for example silicone, a metal or another ductile material. The shape of the mask 20 may partially or completely conform to the shape of the blind hole 14 be adjusted.

The magnetic device 30 has a magnetizable material, in particular a paramagnetic or ferromagnetic material. The magnetizable material can already before the insertion of the mask device 20 . 30 in the blind hole 14 be magnetized or be magnetized only after insertion. Alternatively, the magnet device may include an electromagnet having a power source or an electromagnet that may be connected to a power source.

While in 2 the masking device 20 . 30 still outside the blind hole 14 is shown, shows 3 a schematic representation of the in the blind hole 14 used masking device 20 . 30 , Because the component 10 not part of the masking device 20 . 30 is, is it in 3 as well as in the 4 to 6 and 12 shown with broken lines.

In the 3 to 6 is also a second magnetic device 40 shown at one of the surface 12 turned away and the blind hole 14 or the area not to be coated 16 the surface 12 opposite side of the component 10 is arranged. This second magnet device 40 is an optional component of the marking device. In particular, when the component has no magnetizable material, an attractive magnetic force between the first magnetic device 30 and the second magnet device 40 a clamping of the component 10 between the mask 20 or the first magnetic device 30 on the one hand and the second magnet device 40 on the other hand cause. This clamp fixes the mask 20 at the area not to be coated 16 the surface 12 of the component 10 ,

4 shows a schematic representation of a masking device 20 . 30 that differ from the above based on the 3 illustrated differs in that the magnetic device 30 not completely in the mask 20 is embedded. Instead, the magnetic device 30 in a depression on one of the component 10 opposite side of the mask 20 arranged. As below with reference to the 7 to 11 is described in more detail, the magnetic device 30 by material bond, positive connection or adhesion soluble or not solvable with the mask 20 be mechanically connected or only by an attractive magnetic force between the magnet device 30 on the one hand and the component 10 or the second magnetic device 40 on the other hand, on the mask 20 being held.

The 5 and 6 show schematic representations of masking devices 20 . 30 . 40 Among other things, to mask an area 16 the surface 12 of the component 10 are not sunk or reset, but for example, with the surrounding areas of the surface 12 is arranged flush.

At the in 5 example shown is the magnetic device 30 in the mask 20 completely embedded, or the mask 20 surrounds the magnet device 30 completely at least in the illustrated cross-section.

At the in 6 example shown is the magnetic device 30 arranged in a shallow depression. A first page 22 the mask 20 is trained to the surface 12 of the component 10 facing and the area not to be coated 16 the surface 12 to be covered. A second page 24 the mask 20 is from the first page 22 turned away and lies opposite this. The depression in which the magnetic device 30 is located on the second page 24 the mask 20 arranged. The recess is optional, so the magnet device 30 even only on the second page 24 rest and can be fixed there, for example by gluing, latching, screwing or clamping.

As already indicated, the magnetic device 30 in all the illustrated masking devices merely by an attractive magnetic force between the magnet device 30 on the one hand and the component 10 or optionally the optional second magnetic device 40 on the other hand, on the mask 20 being held. Alternatively or additionally, the mask 20 and the magnetic device to be interconnected by material bond, positive connection or adhesion. Examples will be described below with reference to FIGS 7 to 11 explained. Regardless of the forms of the mask 20 and the magnet device 30 in the examples presented below, these various bonding techniques for a virtually arbitrarily shaped mask are for any planar, concave, convex or complex shaped area 16 a surface that is not to be coated suitable.

7 shows a schematic representation of a masking device, in the mask 20 and magnetic device 30 by barbs 32 connected to each other.

8th shows a schematic representation of a masking device 20 . 30 in which the mask 20 and the magnetic device 30 , by a latching, in particular by means of latching lugs 26 on the mask 20 are connected. Instead of one or more individual locking lugs, for example, an edge of a for the magnetic device 30 provided recess or recess in the mask 20 be formed protruding inside.

A connection by means of barbs or a lock, as with the basis of the 7 and 8th can be provided, if at least either the material of the mask 20 or the material of the magnetic device 30 has a minimum elasticity.

The 9 and 10 show schematic representations of examples of masking devices in which mask 20 and magnetic device 30 are connected by a screw connection. At the in 9 example shown uses a screw 34 through a through hole in the magnet device 30 in a thread in the mask 20 one. At the in 10 illustrated example, the magnetic device 30 even a thread 36 on that in a corresponding thread in the mask 20 intervenes.

11 shows a schematic representation of a masking device, in which a magnetic device 30 in a corresponding recess in a mask 20 glued or pressed in.

As already mentioned, the magnetic device 30 a magnetized, in particular permanent magnetic material or a magnetizable material. When the magnet device 30 Having a magnetizable material, this can before attaching the masking device 20 . 30 on a component 10 or only on the component 10 be magnetized.

12 shows a schematic representation of a masking device 20 . 30 on a component 10 and a magnetization device 50 for magnetizing the magnetic device 30 and / or the component 10 , The magnetization device 50 may include a permanent magnet and / or an electromagnet for generating a magnetic field. In the illustrated example, the magnetization device is 50 at one of the surface 12 of the component 10 opposite side and on one of the masking device 20 . 30 opposite point of the component 10 arranged. Deviating from this, the magnetization device 50 for magnetizing the magnetic device 30 and / or the component 10 on the same side of the component 10 be arranged, on which also the masking device 20 . 30 is arranged. Furthermore, the magnetization device can have several parts, which are connected to one another or can be arranged independently of one another.

The magnetization device 50 can also be used to magnetize a second magnet device 40 as stated above on the basis of 3 to 6 was shown used.

In the above based on the 1 to 12 As shown, the magnetic device is considered separate or at least not simultaneously with the mask 20 manufactured part detachable or firmly connected to the mask. Alternatively, the magnetic device 30 with the mask 20 be made identical or simultaneously. In particular, the material of the mask 20 itself magnetizable or magnetized, in particular be permanent magnetic.

The magnetization device 50 or a similar device may be in an arrangement similar to one of the above based on 12 described arrangements are used to the magnetic attraction between the magnetic device 30 and the component 10 or between the magnetic devices 30 . 40 to reduce and thus removing the masking device 20 . 30 . 40 from the component 10 to simplify after the coating process.

In some of the above based on the 1 to 12 Examples shown may be the fixation of the mask 20 on the component 10 be supported by positive locking between the two.

13 shows a schematic flow diagram of a method for coating a surface of a component. This method includes a method of masking a portion of a surface of the component that is not to be coated, one or more method steps of applying the layer, and a method of removing the masking device from the component. Although the method described below is also applicable to components and masking devices that differ from those described above with reference to FIGS 1 to 12 are distinguished, reference numerals from the 1 to 12 used to facilitate understanding.

At a first step 101 becomes an area 16 a surface 12 a component 10 with a mask 20 covered. In a second step 102 becomes the mask 20 by means of a magnetic device 30 on the component 10 attached. If the component 10 and the magnetic device 20 no magnetized, in particular permanent magnetic material, comprises the second step 102 a magnetizing the magnetic device 30 and / or the component 10 and / or the mask 20 by means of a magnetization device 50 , In this case, the magnetization device becomes 50 after attaching the masking device 20 . 30 on the component 10 at the second step 102 in a third step 103 removed again. Due to the example ferromagnetic properties of the materials of the component 10 and / or the magnetic device 30 and / or the mask 20 the magnetization is retained. The first step 101 and the second step 102 can simultaneously or depending on the arrangement and connection of the mask 20 and the magnet device 30 be executed in any order.

At a fourth step 104 becomes a layer on the surface 12 of the component 10 but not on the mask 20 covered area 16 the surface 12 applied. This is done for example by means of cold-kinetic compacting or another thermal spraying process.

At a fifth step 105 a magnetic field is generated which is the magnetic attraction between the magnet device 30 and the component 10 and / or between the magnetic device 30 and the mask 20 decreases. At a sixth step 106 becomes the magnetic device 30 away. At the same time or before or after the sixth step 106 executed seventh step 107 becomes the mask 20 away.

10

component

12

Surface of the component 10

14

blind

16

area of the surface not to be coated 12 of the component 10

20

mask

22

first page of the mask 20

24

second side of the mask 20

26

Latch of the mask 20

30

first magnetic device

32

Barb on the first magnet device 30

34

screw

36

Thread on the first magnet device 30

40

second magnetic device

50

magnetizing device

101

first step

102

second step

103

third step

104

fourth step

105

fifth step

106

sixth step

107

seventh step

Claims (15)

Masking device for masking a region ( 16 ) of a surface ( 12 ) of a component ( 10 ), which is not to be coated, in a coating process, comprising: a mask ( 20 ) to cover the area ( 16 ); a magnetic device ( 30 ) for holding the mask ( 20 ) on the surface ( 12 ) of the component ( 10 ). Masking device according to one of the preceding claims, in which the magnetic device ( 30 ) at least partially into the mask ( 20 ) is embedded. Masking device according to one of the preceding claims, in which the magnetic device ( 30 ) by means of at least one barb ( 32 ) or a catch ( 26 ) or a screw connection ( 34 . 36 ) or a clamp with the mask ( 20 ) connected is. Masking device according to one of the preceding claims, in which the mask ( 20 ) a first page ( 22 ), which is intended to be on the surface ( 12 ) of a component ( 10 ) and a second page ( 24 ), which is intended to be removed from the surface ( 12 ) of the component ( 10 ) facing away, and the magnetic device ( 30 ) on the second page ( 24 ) of the mask ( 20 ) is arranged. Masking device according to one of the Proverbs 1 to 3, in which the mask ( 20 ) has a magnetizable or magnetized material, and the mask ( 20 ) and the magnetic device ( 30 ) are formed on opposite sides of the component ( 10 ) to be placed around the mask ( 20 ) by clamping the component ( 10 ) between the mask ( 20 ) and the magnetic device ( 30 ) to fix. Masking device according to one of the preceding claims, in which the magnetic device ( 30 ) comprises at least one of a magnetizable material and a magnetized material. Method for masking an area ( 16 ) of a surface ( 12 ) of a component ( 10 ), which is not to be coated, in a coating process, comprising the following steps: covering ( 101 ) of the area ( 16 ) with a mask ( 20 ); Attach ( 102 ) of the mask ( 20 ) on the component ( 10 ) by means of a magnetic device ( 30 ). Method according to one of the preceding Verfahrensan, wherein the mask ( 20 ) between the magnetic device ( 30 ) and the component ( 10 ) is clamped. Method according to Claim 7, in which the component ( 10 ) between the mask ( 20 ) and the magnetic device ( 30 ) is clamped. Method according to one of the preceding method claims, wherein the step of fastening ( 102 ) magnetizing at least one of the magnetic devices ( 30 ) or the component ( 10 ) by means of a magnetization device ( 50 ), wherein the magnetization device ( 50 ) removed after magnetization ( 103 ) becomes. Method for removing a masking device with a magnetic device ( 30 ) and a mask ( 20 ), which is an area ( 16 ) of a surface ( 12 ) of a component ( 10 ), which is not to be coated, covered in a coating process, comprising the following steps: 105 ) of a magnetic field which causes a magnetic attraction between the magnetic device ( 30 ) and the component ( 10 ) or between the magnetic device ( 30 ) and the mask ( 20 ) reduces; Remove ( 106 ) of the magnetic device ( 30 . 40 ) of the component ( 10 ); Remove ( 107 ) of the mask ( 20 ) from the surface ( 12 ) of the component ( 10 ). Method for coating a surface ( 12 ) of a component ( 10 ), with the following steps: Masking an area ( 16 ) of the surface ( 12 ) of the component ( 10 ), which is not to be coated, according to any one of claims 7 to 10; Application ( 104 ) of a layer on the surface ( 12 ) of the component ( 10 ); Removing the masking device according to claim 12. Method according to one of the preceding method claims, in which a masking device ( 20 . 30 . 40 ) is used according to one of the preceding device claims. Masking device according to one of the preceding Device claims, wherein the masking device for a method according to the preceding method claims is formed. Magnetic device ( 30 . 40 ) for a masking device according to one of the preceding device claims or a method according to any one of the preceding method claims.