DE102016000134A1 - Device for trimming, in particular edges on wind rotor blade parts - Google Patents

Abstract

The invention relates to a device for trimming, in particular of edges on wind rotor blade parts. According to the invention, a holding device (29) is provided, on or with which a sawing device is held by a motor.

Description

The invention relates to a device for trimming, in particular of edges on wind rotor blade parts.

Rotor blades for wind turbines now have a length corresponding to the span of large commercial aircraft. The rotor blades must be manufactured extremely precisely due to the high dynamic loads and aerodynamic requirements. The material used is a composite material, such as glass fiber reinforced epoxy resin. Also straps and bars are used as deposits. Is known u. a. the production of several parts to be joined together, such as with two half shells for suction side and pressure side or a trisection with leading edge region, middle region and trailing edge region. Dividing seams between the parts run in the longitudinal direction of the rotor blade. Integrated into said parts or provided as separate parts can be wing tips and transitions to a rotor hub, the so-called flange area or root area. These areas can also initially be made in parts and then joined together.

The individual parts are made in molds. Glass fiber mats or other reinforcing material are placed in the mold and potted with epoxy or other matrix material. After the curing of the matrix material, overhanging material has to be cut off so as to give the molded part the final shape. The cutting in the area of the mold edges is referred to as trimming and previously performed manually, possibly using auxiliary rails, along which a saw is guided. The auxiliary rail is applied to the mold. Challenging contours of the moldings can not be precisely trimmed in this way.

The trimming is carried out in particular in the manufacture of parts for the flange or root area of rotor blades. Preferably, the flange is divided into two parts in the manner of half-shells, which must be connected together. For this, the edges of the parts are trimmed before.

When trimmings fine dust accumulates. It is necessary to have protection against the spreading of the dust and in favor of people staying nearby.

The object of the present invention is to provide a device with which the trimming of edges on wind rotor blade parts is possible, in particular of edges on flange parts. Also measures should be taken to protect against accumulating dust during trimming.

To achieve the object, the device according to the invention has the features of claim 1. In particular, a holding device is provided, on or with which a sawing device is held by a motor. By means of a drive so the sawing device with the holding device or relative to this is movable. The fixture is best positioned so that the trimming is possible with a simple movement of the sawing device. A guidance of the sawing device on the mold during sawing is no longer necessary. The leadership of the movement can be done by the holding device or by the drive itself.

The holding device can be configured very differently, for example as a frame on which the sawing device is held by a motor, or as a robot arm, with which the sawing device can be moved by motor, or as a combination of both or in another way.

Advantageously, the sawing device is movable relative to the holding device or by means of the same along a cutting direction. The cutting direction is also referred to as a sawing or Besäumrichtung, hereinafter also as the X direction.

Also advantageous is a mobility of the sawing device relative to the holding device or by means of the same transversely to the X direction (cutting direction), in particular in the direction of a depth of cut. The latter is also referred to below as Z-direction.

According to a further aspect of the invention, the sawing device can be moved by a motor relative to the holding device or by means of the same in one direction - hereinafter referred to as the Y direction - which extends transversely to the X direction (cutting direction) and transversely to the Z direction (cutting depth).

For the movements in X, Y and / or Z-direction suitable guides may be provided, such as in the form of mechanical investment means or by effective only in the specific direction drives.

Advantageously, at least one drive is provided for moving the saw device relative to the holding device, which drive is a linear drive, in particular a spindle drive and / or a rack drive. The linear drive acts directly in only one direction. Additional guide means can be omitted.

According to a further aspect of the invention, the sawing device is movable relative to the holding device or by means of the same in at least two or three directions, for which purpose suitable drives are provided, and wherein the drives can be controlled by a common control. In this way, coordinated movements of the drives and a program-controlled movement of the sawing device are possible. The sawing device can thus trim almost any contours.

According to the invention, the holding device can be provided with a saw guide, wherein the sawing device can be moved by a motor relative to the saw guide in the Z direction (cutting depth). The saw guide preferably includes a in the X direction (cutting direction) extending guide rail, on which a carriage is displaceable together with the sawing device.

Advantageously, the saw guide is movable in motor relative to the holding device in the Y direction, the Y direction running transversely to the X direction (sawing direction) and transversely to the Z direction (cutting depth).

According to a further aspect of the invention, it is provided that the saw guide is mounted at two points and can be moved there by a motor drive relative to the holding device in the Y direction. The drives are preferably vertical drives and provided at the ends of the guide rail and independently activated. As a result, the height and inclination of the saw guide are adjustable.

Advantageously, the drives are pivotally mounted both on the saw guide and on the holding device. Preferably, pivot axes of this bearing extend in the Z direction (depth of cut). The pivotal mounting tension is avoided by tilt adjustment.

According to a further aspect of the invention, a slide in the X direction (cutting direction) can be moved by a motor on the saw guide, the saw device being associated with the carriage. Preferably, the sawing device is provided below the carriage. The carriage is advantageously held under a guide rail and movable.

Advantageously, relative to the carriage, a holding member along a rail in the Z direction (depth of cut) can be moved by a motor, wherein the sawing device is held on the holding member. The holding member is moved by means of a linear drive / spindle drive in the Z direction by motor.

According to a further aspect of the invention, the holding device is at least partially formed in the manner of a portal and is supported in particular on or on a receptacle for a form. The mold, for example for producing a molded part, in particular a wind rotor blade part, is held in the receptacle. The holding device spans the mold and preferably has at least three support legs, in particular at least two support legs on each side of the mold. Advantageously, the holding device with the recording is fixed but releasably connected. The sawing device preferably hangs on the holding device.

According to a further aspect of the invention, two sawing devices are held by a motor on the holding device. In this case, the sawing devices are in particular arranged such that two mutually opposite edges of a mold part lying in the mold can be trimmed at the same time. If a longitudinal axis is defined by the shape or the molded part or its orientation in the mold, the two sawing devices should preferably be provided in a mirror-image arrangement with respect to the longitudinal axis.

According to a further aspect of the invention, the sawing device is arranged in a cabin, wherein the cabin is movable relative to the holding device or by means of the same, in particular in the X direction (cutting direction). The dust generated during sawing is prevented from spreading by the cabin. At least the spread of dust is limited. Preferably, the sawing device is motor-driven within the cabin in the Z direction.

According to a further aspect of the invention, the cabin has a suction device. With the suction, the resulting dust can be removed immediately from the cabin. Part of the suction device may be a suction tube, which extends from the outside through a wall of the cabin into the interior of the cabin and there has a suction opening. The suction opening is positioned close to the sawing tool, such as a rotating saw blade and is preferably in a plane with the sawing tool, such as in the plane formed by the rotating saw blade.

Advantageously, the cabin is at least partially open on its underside, in particular below the sawing device, for instance below a section of the sawing tool involved in the sawing process. When using a rotating saw blade, an opening of the car is preferably located below the part of the saw blade, which has contact with the molded part to be edged during sawing.

According to a further aspect of the invention, the cabin is provided in the X-direction (cutting direction) and / or in the opposite direction with an opening, wherein the opening is preferably covered by hanging slats. The openings in the X direction may connect to the opening at the bottom of the cabin and preferably lie close to a front of the cabin. This results in a U-shaped opening of the cabin. Legs of the U-shape are preferably covered by the hanging slats. Through the openings can be sucked by the suction air, which entrains the dust.

According to a further aspect of the invention, the cabin has an opening in the region of a front wall. In particular, the cabin has a front wall divided into upper part and lower part, wherein the lower part is movable upwards for opening and, in particular, is designed as a sliding element. Alternatively, a folding element may be provided. Preferably, a frame extends around the entire front wall and remains stationary even when the base is moved upwards. The front wall of the cabin is defined as the front wall in the Z direction (depth of cut). In the case of a cuboid shape of the cabin, a rear wall results in the opposite direction, side walls in the X direction (cutting direction), an upper wall in the Y direction and a bottom wall in the opposite direction.

According to a further aspect of the invention, the cabin is at least partially glazed and / or has a three-dimensional frame made of profiled bars. A glazing or walls can be easily used in the frame of profile bars. Also, the frame may have additional profile bars as receptacles for the sawing device.

Further features of the invention will become apparent from the description, moreover, and from the claims. Advantageous embodiments of the invention are explained below with reference to drawings. Show it:

1 a schematic plan view of a rotor blade of a wind turbine,

2 a perspective view of a device for trimming, with inserted molded part,

3 a perspective view of a device for trimming, namely a bird's eye view from a left side,

4 the device for trimming according to 3 in a side view from the left,

5 the device for trimming according to 3 in a bird's-eye view from a right side,

6 the device for trimming according to 3 in a side view from the right,

7 the device for trimming according to 3 in front view,

8th the device for trimming according to 3 in a plan view,

9 a detail of the device for trimming, namely a drive for a movement in the Y direction (movement upwards and downwards),

10 a detail of the device for trimming, namely a cab with sawing device,

11 the cabin according to 10 (but without sawing device) from a bird's-eye view,

12 the sawing device in cross section,

13 the sawing device in a front view,

14 the sawing device in a plan view.

A rotor wing 20 for a wind turbine not shown in detail can be according to 1 divide into at least three areas, a wing tip 21 , a leaf area 22 and a flange area 23 , which is also called root area. Over the flange area 23 is the rotor blade 20 connected to a rotor hub, not shown.

The rotor wing 20 is made of a composite material. Usual is the production of a half shell or smaller cup-shaped components in a concave shape 24 , Carbon fiber mats are placed in the mold and then soaked in resin. After curing of the resin, the finished part of the mold can be removed.

Depending on the design of the rotor blade and the course of the manufacturing process can in the manufacture of the molding on both sides of the mold 24 one supernatant each 25 about mold edges 26 arise, see 2 , This applies in particular in connection with the production of the flange areas 23 , 2 shows a half shell 27 for a flange area 23 during production in the mold 24 , The supernatants to be trimmed 25 are essentially parallel to each other, but may also differ.

The above supernatant 25 must before removing the half shell 27 be straightened. This process is called trimming. To carry out the trimming, here are two sawing devices 28 ( 12 - 14 ) in each case along three axes movable by motor. For trimming or trimming, the sawing devices 28 in the direction of a depth of cut (Z-direction), in sawing direction (X-direction) and transversely to the two said directions (Y-direction) moves. In the present case, the Y-direction refers to an upward and downward movement, see 2 ,

The sawing devices 28 are on a holding device 29 movable by motor. The holding device 29 at the same time takes the form 24 on and consists of a lower frame 30 in which the form 24 is held, and a portal-like, upper frame 31 which is above the mold 24 extends. In this case, the lower frame 30 each side two L-shaped outward and upstanding support posts 32 on, on which corresponding support legs 33 of the upper frame 31 are attached. This way is between the two racks 30 . 31 enough space for the form 24 and for the movement of the sawing devices 28 ,

The upper frame 31 has a rectangular frame 34 on, from which stands the support legs 33 extend sideways and downwards. At the same time are at the frame 34 two saw guides, namely double rails 35 . 36 , suspended as guide rails adjustable. The double rails 35 . 36 extend in the X direction (sawing direction) and are each movable at their ends in the Y direction upwards and downwards. In this way, both the inclinations of the double rails 35 . 36 as well as the heights thereof within the fixture 29 be adjusted.

Possible is the adjustment by a rack and pinion drive 37 as a linear drive at each end of a double rail 35 . 36 , The drive is a vertical handrail 38 at each end of a double rail 35 . 36 motor-driven upwards and downwards. A free bottom end 39 the handrail 38 is articulated with a cross connector 40 connected. The cross connector 40 is at the end of each double rail 35 . 36 provided, see in particular 9 , Above the cross connector 40 is the rack drive 37 with the handrail 38 articulated on the frame 34 suspended. A pivot axis 41 extends parallel to the cross connector 40 above it. By the described suspension, the double rails 35 . 36 be adjusted in their inclination without mechanical tension.

Every double rail 35 . 36 is with a spindle drive 42 with spindle rod 42a Mistake. The spindle rod 42a runs centrally parallel to the respective double rail 35 . 36 , please refer 7 ,

Along each double rail 35 . 36 is a sled 43 movable, which at the same time a spindle nut 44 carries rotationally. The rotation of the spindle rod 42a in the spindle nut 44 causes a displacement of the carriage 43 along the respective double rail 35 . 36 and thus in the X direction.

Every sled 43 has a holder, here in the form of a plate 45 , please refer 10 , The plate 45 is with a cabin 46 firmly connected. The cabin 46 is essentially cuboid, with a three-dimensional support frame with glazing. Inside the cabin 46 is the associated sawing device 28 held. The cabin 46 has front wall 47 , Rear wall 48 , Upper wall 49 , Subsoil 50 and sidewalls 51 . 52 on.

In the area of the upper wall 49 run in the Z direction two struts 53 between those with the sled 43 connected plate 45 is fixed. Optionally, the plate 45 between the struts 53 dissolved, moved in the Z direction and fixed again.

Under the plate 45 is the sawing device 28 on a holding device 54 fixed. The holding organ 54 is at one of the plate 45 associated and not shown in detail rail relative to the cabin 46 Motor-displaceable in Z-direction. These have sawing device 28 and holding member 54 a spindle drive 54a on. A rotating saw blade 55 the sawing device 28 lies here in a substantially horizontal plane.

In the area of the back wall 48 is a suction tube 56 in the cabin 46 guided. The sawing device 28 points next to the saw blade 55 a suction funnel 57 on, to the suction tube 56 connected. Rising sawdust is poured over the intake funnel 57 from the cabin 46 aspirated. The suction tube 56 leads to a suction unit, not shown.

Basically, the cabin 46 completely closed or glazed trained, but not along a portion of the bottom wall 50 and along each of a small portion in the region of the side walls 51 . 52 , The opening thus formed has a U-shape and allows the movement of the car 46 exactly along the protrusion to be processed 25 , The opening can be in the area of the side walls 51 . 52 by hanging slats 58 be covered, see in particular 3 ,

The front wall 47 is divided into two parts with an upper part 59 and a lower part 60 , The upper part 59 is fixed, while the lower part 60 at the top 59 is upwardly displaceable. 10 shows the lower part 60 in a lower position, as well 5 , 3 In contrast, shows an upper position of the lower part 60 so that the upper part 59 is covered. By moving the lower part up or down 60 is the front wall 47 to the position of the form 24 and the supernatant to be processed 25 customizable.

The two struts 53 the cabin 46 run in the plane of the upper wall 49 and extend over the back wall 48 out. Free ends of the struts 53 are by oblique beams 61 against a lower edge of the back wall 48 supported.

The drives 37 . 42 . 54 are controlled by a common control, not shown, so that the sawing device 28 can perform precisely defined movements in space.

LIST OF REFERENCE NUMBERS

20

rotor blades

21

pinion

22

leaf area

23

flange

24

Shape (concave)

25

Got over

26

shaped rim

27

Half shell (for flange area)

28

sawing

29

holder

30

Lower frame

31

Upper frame (portal-like)

32

support posts

33

support legs

34

frame

35

double rail

36

double rail

37

Rack and pinion drive

38

Handrail

39

The End

40

cross-connector

41

swivel axis

42

spindle drive

42a

spindle rod

43

carriage

44

spindle nut

45

plate

46

cabin

47

front wall

48

rear wall

49

upper wall

50

under wall

51

Side wall

52

Side wall

53

holding struts

54

holding member

54a

spindle drive

55

sawblade

56

suction tube

57

Velocity Stacks

58

slats

59

upper part

60

Lower part

61

Slanted girders

Claims (20)

Device for trimming, in particular of edges on wind rotor blade parts, characterized by a holding device ( 29 ), on or with the one sawing device ( 28 ) is held by a motor. Apparatus according to claim 1, characterized in that the sawing device ( 28 ) relative to the holding device ( 29 ) or by means of the same along an X-direction (cutting direction) is motor-driven. Apparatus according to claim 1 or 2, characterized by a mobility of the sawing device ( 28 ) relative to the holding device ( 29 ) or by means of the same transversely to the X-direction (cutting direction), in particular in a Z-direction (depth of cut). Device according to claim 1 or one of the further claims, characterized in that the sawing device ( 28 ) relative to the holding device ( 29 ) or by means of the same in a Y-direction is motor-driven, which is transverse to the X-direction (cutting direction) and transverse to a Z-direction (depth of cut). Device according to claim 1 or one of the further claims, characterized in that for the method of the sawing device ( 28 ) relative to the holding device ( 28 ) at least one linear drive is provided, in particular a spindle drive ( 42 . 54 ) and / or a rack drive ( 37 ). Device according to claim 1 or one of the further claims, characterized in that the sawing device ( 28 ) relative to the holding device ( 29 ) or by means of which it can be moved by motor in at least two or three directions, suitable drives being provided for this purpose, and wherein the drives can be controlled by a common control. Device according to claim 1 or one of the further claims, characterized in that the holding device ( 29 ) is provided with a sawing guide, wherein the sawing device ( 28 ) is movable by a motor relative to the saw guide in the Z direction (cutting depth). Apparatus according to claim 7, characterized in that the saw guide relative to the holding device ( 29 ) is motor-driven in Y-direction, wherein the Y-direction is transverse to the X-direction (cutting direction) and transverse to the Z-direction (depth of cut). Apparatus according to claim 7 or 8, characterized in that the saw guide mounted at two points and there by a respective drive relative to the holding device ( 29 ) is motor-driven in the Y direction. Apparatus according to claim 9, characterized in that the drives for the process of Sägeführung in the Y direction both on the Sägeführung ( 28 ) as well as on the holding device ( 29 ) are pivotally mounted. Device according to claim 7 or one of the further claims, characterized in that a carriage ( 43 ) on the saw guide in the X direction (cutting direction) is motor-driven, wherein the carriage ( 43 ) the sawing device ( 28 ) assigned. Apparatus according to claim 11, characterized in that relative to the carriage ( 43 ) a holding member along a rail in the Z direction (cutting depth) is motor-driven, wherein the sawing device ( 28 ) is held on the holding member. Device according to claim 1 or one of the further claims, characterized in that the holding device ( 29 ) is formed at least partially in the manner of a portal. Device according to claim 1 or one of the further claims, characterized in that on the holding device ( 29 ) two sawing devices ( 28 ) are held movable by a motor, in particular such that two opposite edges of a molding can be trimmed simultaneously. Device according to claim 1 or one of the further claims, characterized in that the sawing device ( 28 ) in a cabin ( 46 ) is arranged, wherein the cabin ( 46 ) relative to the holding device ( 29 ) or by means of the same, in particular in the X direction (cutting direction). Apparatus according to claim 15, characterized in that the cabin ( 46 ) has a suction device, in particular a suction tube ( 56 ). Apparatus according to claim 15 or 16, characterized in that the cabin ( 46 ) is at least partially open on its underside, in particular below the sawing device ( 28 ). Device according to claim 15 or one of the further claims, characterized in that the cabin ( 46 ) is provided in the X-direction (cutting direction) and / or in the opposite direction with an opening, the opening preferably by hanging slats ( 58 ) is covered. Device according to claim 15 or one of the further claims, characterized in that the cabin has an upper part ( 59 ) and lower part ( 60 ) divided front wall ( 47 ), wherein the lower part ( 60 ) is movable upwardly for opening and in particular designed as a sliding element. Device according to claim 15 or one of the further claims, characterized in that the cabin ( 46 ) is at least partially glazed and / or has a three-dimensional frame made of profiled bars.

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