DE102010018284A1 - Turbine blade blank, and method and apparatus for machining a turbine blade blank - Google Patents

Abstract

A method according to the invention for machining a turbine blade blank (26) comprises the following steps: first clamping of a forged and cooled turbine blade blank (26) with forging burr (36) in a processing machine (2) with two opposite handling units (4; 14); mechanical removal of the burrs (52, 56) on the blade head (28) and on the blade root (34) of the turbine blade blank (26) with the formation of retaining elements (58, 60), in particular at least one protrusion (60) and / or a notch ( 58), on the blade head (28) and on the blade root (34); second clamping of the turbine blade blank (26) in the processing machine (2) by means of the holding elements (58, 60); and mechanically removing the burrs (74) on the side portions of the turbine blade blank (26).

Description

The present invention relates to a method and an apparatus for machining a turbine blade blank and a turbine blade blank

Turbine blades, such as those used in power plants or in aircraft engines, can have a blade root to blade tip length of up to 2,600 mm. Your profile must meet the given requirements very precisely.

For the production of such turbine blades, a turbine blade blank is first forged, and the resulting forgings are cut off or decoupled when hot in the forge. The turbine blade blank is finished after cooling.

In such turbine blades has proved to be disadvantageous that deviations of the actual contour of the required Soll Kontor result, in particular, bending and deformation. This effect is particularly pronounced in turbine blades with thin blades. This leads to efficiency losses and to a reduced service life of such turbine blades. To avoid this, more material must be added to the forging, which must be eliminated with increased effort.

It is therefore an object of the present invention to provide a method and an apparatus for machining a turbine blade blank, with which turbine blades can be produced, whose profile corresponds to the required specifications very accurately. Cumbersome preparatory measures on the turbine blade blank should be avoided.

This object is solved by the subject matter of the independent patent claims. Advantageous developments emerge from the dependent claims.

In a method according to the invention for machining a turbine blade blank, first a first clamping of a forged and cooled turbine blade blank with forging ridge takes place in a processing machine with two opposing handling units. Thereafter, the burrs on the blade head and on the blade root of the turbine blade blank are mechanically removed to form support members, in particular at least one projection and / or a notch, on the blade head and on the blade root. This is followed by a second clamping of the turbine blade blank into the processing machine, by means of the turbine blade blank-side holding elements. Then, the forgings are mechanically removed at the side portions of the turbine blade blank.

In apparatus terms, this object is achieved by a turbine blade blank handling apparatus comprising: two opposed rotatable handling units for a turbine blade blank positioned therebetween, aligning members attachable to the handling units for aligning the blade head and the blade root of the turbine blade blank, attachable to the handling units first clamping elements for clamping the turbine blade blank therebetween, and on the handling units attachable second clamping elements for clamping the turbine blade blank by means of the support elements of the turbine blade blank.

The present invention takes a completely new approach, because the forgings of the turbine blade blank are not, as usual, still hot in the material state in the forge with a special tool, in particular a trimming tool, cut or sheared, but the forgings according to the invention rather mechanical, especially removed by milling.

Namely, the inventors of the present application have found that cutting the forgings in the forge immediately after being hot formed causes large shearing forces, which often leads to irreversible bending and deformation of the turbine blade blank, which is particularly true in turbine blades thin vanes, which have, for example, at certain points only a thickness of a few millimeters, is a great disadvantage. The resulting disadvantages of the deviations of the actual contour of the profile of the turbine blade from the required nominal contour and the resulting power losses and the resulting reduced lifetime are avoided in the present invention, because the forging is initially left on the turbine blade blank and mechanically removed only in the cooled state of the turbine blade blank.

According to another aspect of the invention, the turbine blade blank may be finished after forging in a base device. The first clamping of the turbine blade blank takes place such that large areas of the blade root and the blade head for the tool that removes the forging ridge, remain accessible, so that in this first clamped state, the forgings can be almost completely removed on the blade head and on the blade root.

According to a further basic idea of the present invention, in this removal of the burrs on the blade head and on the blade root in the first clamped state of the turbine blade blank, support elements are provided on the blade head and on the blade root, in particular at least one projection and / or at least one notch, by means of which the second clamping of the turbine blade blank is made possible. Further preparation of the turbine blade blank for the second clamping, in which the burrs are mechanically removed at the side areas, in particular special auxiliary elements such as tabs, holes, centering or the like can be completely eliminated.

Due to the high accuracy of the position of the turbine blade blank during the first clamping, these turbine blade blank-side holding elements can be formed with exact position, resulting in a high precision and good repeatability of the machining process.

In a first embodiment of the invention, for the first clamping of the turbine blade blank in the processing machine, first the blade head and the blade root are aligned by means of alignment elements attached to the handling units, and then clamping elements attached to the handling units are moved against the blade head and the blade root.

The alignment elements may in particular be designed as support elements, which extend from an attachable to the handling unit base region substantially upwards and provide a support surface or contact surface for specific, precisely definable areas of the blade head or the blade root.

The first clamping elements can each comprise at least two adjustable support pins for supporting the blade head or the blade root and at least one clamping jaw for the method against the blade head or the blade root or for clamping the same. Thereby, the turbine blade blank can be clamped in a simple manner safely and accurately in the first clamping position, and there is a good repeatability of this first clamping position.

According to a further embodiment of the invention, for clamping the turbine blade blank in the processing machine, second clamping elements are provided, the clamping element side holding elements are brought into engagement with the turbine blade blank side support members to position the turbine blade blank. So safely positioned, the second clamping elements can securely clamp the turbine blade blank between the handling units.

Advantageously, the second clamping elements can comprise adjustable holding elements, in particular holding pins for positioning the turbine blade blank, which can be brought into engagement with the turbine blade blank side holding elements, and clamping jaws for clamping the turbine blade blank between the handling units.

By the interaction of the clamping element-side holding elements with the turbine blade blank-side holding elements, which are both located at defined positions of the processing machine or the turbine blade blank, a highly accurate, and repeatable fixation of the turbine blade blank can be achieved. The jaws then securely clamp the turbine blade blank for subsequent mechanical processing between the handling units.

According to a further embodiment of the invention, the mechanical removal of the burrs on the blade head and on the blade root and on the side regions of the turbine blade blank takes place by first milling a plurality of elongated openings between the outer profile of the turbine blade and the outwardly adjoining forgings and webs, in the circumferential direction be allowed to stand in between and then by the Schmiedegratbereiche or Schmiedegratkerne be removed by removing, in particular breaking the webs. The removal of the webs can be done, for example, supported by a tool, such as a hammer or a saw.

By this two-stage removal of Schmiedegratbereiche the outer profile of the turbine blade can be made with high precision and damage to the machine or the periphery by uncontrolled falling Schmiedegratkerne can be avoided.

According to a further embodiment of the invention, the profile of the turbine blade in the processing machine in the second clamped state, in which the turbine blade blank is clamped by means of the support elements is, finished immediately, in particular finished milled. This results in a particularly rapid production of the finished turbine blade.

Finally, a third clamping of the turbine blade blank in the processing machine by means of third clamping elements for mechanically removing the turbine blade blank side support elements can be done. The turbine blade blanks side support members are preferably removed mechanically, in particular weggefräst.

The turbine blade produced according to the invention from the turbine blade blanks can finally be subjected to subsequent process steps, for example cleaning, polishing, etc.

The invention further relates to an apparatus for machining a turbine blade blank with a device for handling a turbine blade blank of the type described above and with at least one cutting tool, in particular a milling tool, remove the forging rate of the turbine blade blank finished machining the profile of the turbine blade blank, in particular finished milling and / or remove the support elements of the turbine blade blank mechanically, in particular can mill away.

Such a cutting tool, in particular milling tool, may be of conventional design, but should be small enough and movable enough to be able to reach the blade head and blade side regions of the turbine blade blank in the first clamped state.

The invention further relates to a turbine blade blank with a blade head, with an airfoil and with a blade root, in which on the blade head and the blade root integral support members, in particular at least one projection and / or a notch, are formed to the turbine blade blank in a precise position in a processing machine clamp.

The advantages given above with respect to the machining method and the handling device also apply to the turbine blade blank, in particular the simplified second clamping of the turbine blade blank, the elimination of further preparation of the turbine blade blank for the second clamping and in particular the elimination of special auxiliary elements such as tabs, holes, Centering or the like, a positionally accurate design of the integral support members as well as a high precision and good repeatability of the machining process.

The invention is explained in more detail below with reference to embodiments in reference to the accompanying figures.

1 shows a schematic representation of a five-axis milling machine with a turbine blade blank positioned therein in a first method step and a front view of a blade head alignment unit and a front view of an alignment unit for the blade root;

2 shows a schematic representation of the five-axis milling machine 1 with the turbine blade blank positioned and clamped therein in a second process step;

3 shows a schematic representation of the five-axis milling machine 1 with the turbine blade blank clamped therein in a third process step, and side views of the removed blade head and blade root alignment units;

4 shows a schematic representation of the five-axis milling machine 1 with the turbine blade blank clamped therein in the third process step and enlarged plan views of the blade head and the blade root;

5 shows a schematic representation of the five-axis milling machine 1 with the turbine blade blank removed therefrom in a fourth method step and enlarged plan views of the blade head and the blade root;

6 shows by means of her 6 (a) a plan view of the turbine blade blank, wherein the Schmiedegratkerne are still connected by means of webs with the turbine blade blank, and by their 6 (b) a plan view of the turbine blade blank, wherein the webs have been separated in a fifth method step of the turbine blade blank;

7 shows a schematic representation of the five-axis milling machine 1 without the turbine blade blank clamped therein in a sixth method step with holding pins and clamping jaws attached to the handling units;

8th shows a schematic representation of the five-axis milling machine 1 with the turbine blade blank clamped therein by means of support pins and support elements in a seventh process step;

9 shows a schematic representation of the five-axis milling machine 1 with the therein by means of retaining pins and In a eighth process step in which the forged ridge cores are connected by means of webs with the turbine blade blank;

10 shows a schematic representation of the five-axis milling machine 1 with the turbine blade blank clamped therein by means of support pins and support members in a ninth step of the process wherein the lands have been severed from the turbine blade blank;

11 shows a schematic representation of the five-axis milling machine 1 with the turbine blade blank clamped therein by means of support pins and support elements in a tenth method step;

12 shows a schematic representation of the five-axis milling machine 1 with the turbine blade blank removed therefrom in an eleventh method step; and

13 shows a schematic representation of the five-axis milling machine 1 with the turbine blade blank clamped therein in a twelfth process step.

1 shows a schematic representation of a five-axis milling machine 2 with a turbine blade blank positioned therein 26 and a front view of an alignment unit 8th for the blade head 26 and a front view of an alignment unit 18 for the blade foot 34 ,

The five-axis milling machine 2 is shown as an example of a device according to the invention for machining a turbine blade blank. The five-axis milling machine 2 has a left handling unit 4 with a left base element attached thereto 6 as well as a right handling unit 14 with a right base element attached thereto 16 , The handling units 4 and 14 are arranged at such a distance from each other that in the space therebetween a turbine blade blank 26 can be positioned and processed in the longitudinal direction. The handling units 4 and 14 are rotatably formed so that they can pivot the turbine blade blank clamped therebetween for the respective processing step by means of a machining tool, not shown here.

The turbine blade blank 26 is located longitudinally between the handling units 4 and 14 , In the present embodiment, its blade head 28 to the left handling unit 4 down and his shovel foot 34 to the right handling unit 14 is aligned. Of course, the turbine blade blank can 26 be arranged and tensioned the other way round.

In 1 is the airfoil 32 as well as the entire turbine blade blank 26 encircling forging ridge 36 clearly visible. At the in 1 as well as in the following figures turbine blade blank 26 It is a special turbine blade that is used in the low pressure range of power plants. Any other shovel can also be used and processed in this way. The turbine blade blank 26 has been forged, and the forge ridge is on the turbine blade blank 26 been left. The turbine blade blank 26 is according to 1 in the cooled state introduced into the five-axis milling machine and aligned there exact position.

At the left base element 6 is an alignment unit 8th for the blade head 28 appropriate. The alignment unit 8th has a base plate 10 attached to the lower end of the left base element 6 attaches and a little way to the right in the processing space between the handling units 4 and 14 extends. From the right end of the base plate 10 a columnar alignment element extends 12 upward to about a position a little way below the vertical center position of the left handling unit 4 , In the present embodiment, this columnar alignment element 12 as best seen in the lower front view, is provided with a central recess to provide a blade blade assist geometry therein 30 the blade head 28 the turbine blade blank 26 take.

At the bottom of the right base element 16 is an alignment unit 18 for the blade foot 34 attached. This alignment unit 18 has a base plate 20 attached to the lower end of the right base element 16 attaches and a little way into the processing space between the handling units 4 and 14 extends, and about columnar alignment elements 22 . 24 extending from the top of the left end of the base plate 20 extend upwards. As in the front view of the alignment unit 18 for the blade foot 34 can be seen, are a total of four columnar alignment elements 22 and 24 provided, of which the outer two are formed higher than the middle two. The middle two columnar alignment elements 22 offer with their tops bearing surfaces for the blade root 34 , in particular on the profile of the back side, once near the leading edge and once near the trailing edge of the blade root 34 , The leftmost columnar alignment element 24 is at its upper end with an inward projection equipped and fixed the blade foot 34 to the side. The columnar alignment element 24 with lateral stop is provided in particular for positioning at a point for lateral alignment on the base side. The rightmost pillar-shaped alignment element 22 provides a stop to the right for the blade root 34 ,

For aligning the turbine blade blank 26 become the typical elements of the bucket blank 26 used, namely the blade profile of the airfoil 30 , the blade foot 34 and an auxiliary geometry 30 at the end of the blade 32 , The blade profile of the blade 32 and the blade foot 34 are typical elements of a turbine blade, the auxiliary geometry is forged with forged on the blade profile and has approximately the shape of a cylinder.

For aligning the turbine blade blank is now 26 with its vane help geometry 30 on the columnar alignment element 12 and with two points on the back of the turbine blade blank 26 namely, once near the leading edge and once near the trailing edge, on the middle two columnar alignment elements 22 hung up. Through these three points of support, the turbine blade blank 26 be precisely aligned, an over-determination by too many support points is thereby avoided. In addition, the blade foot 34 through the two outer columnar alignment element 22 and 24 fixed on the side. The turbine blade blank 26 is thus precise and repeatable with respect to the handling units 4 and 14 aligned.

2 shows a schematic representation of the five-axis milling machine 2 with the turbine blade blank positioned and clamped therein 26 ,

According to 2 becomes the turbine blade blank 26 now clamped. This will be done on the left base element 6 left support pins 38 provided that extends a little way into the processing space between the handling units 4 and 14 extend to a length position a distance far to the right of the columnar alignment element 12 , Likewise, on the right base element 16 two support pins 42 provided, a little way to the left in the processing space between the handling units 4 and 14 extend, except for a length position at the left end of the blade root 34 , The left support pins 38 and the right support pins 42 are located on the lower side of the turbine blade blank 26 ,

The left support pins 38 and the right support pins 42 are individually adjustable. These are now adjusted so that the turbine blade blank 26 with his shovel head 28 and rest his blade on it. By applying the two left adjustable support pins 36 and the two right adjustable support pins 42 becomes the position of the turbine blade blank 26 secured when the alignment units 8th and 18 be removed.

Furthermore, the left base element 6 and the right base element 16 each with a left jaw 40 or a right clamping jaw 44 , which against the blade head 28 or the blade foot 34 are movable and the turbine blade blank 26 thus safe in the space between the handling units 4 and 14 can clamp. The left support pins 38 , the left jaw 40 , the right support pins and the right clamping jaw 44 are also arranged so that, seen from the top view, there are gaps through which the end faces of the turbine blade blank with tools 26 can be achieved mutually and overlapping, as in the following 5 you can see.

After applying the support pins 38 and 42 become the jaws 40 and 44 against the turbine blade blank 26 move and clamp this safely, so that this in the subsequent processing by the handling units 4 and 14 rotated and edited with one or more tools.

3 shows a schematic representation of the five-axis milling machine 2 with the turbine blade blank clamped therein 26 and side views of the removed alignment units 8th and 18 for the blade head 28 and for the blade foot 34 ,

According to 3 now become the alignment units 8th and 18 away.

4 shows a schematic representation of the five-axis milling machine 2 with the turbine blade blank clamped therein 26 and enlarged plan views of the blade head 28 and the blade foot 34 ,

According to 4 will now be on both blade end faces, so on the front side of the blade head 28 and on the front of the blade foot 34 , which removes protruding material. This is done by means of a suitable tool, for example a milling head 46 which can be designed in particular as a shoulder cutter.

By training the left support pins 38 and the left jaw 40 as well as the right support pins 42 and the right jaw 40 is ensures that for the milling head 46 enough space is available that he can remove the forging burr at the ends or prepare for removal. The forge 36 may have a thickness of several millimeters and in particular project in a range of 10 to 50 mm from the workpiece.

As in 4 It can be clearly seen on the front sides of the blade head 28 and the blade foot 34 elongated openings 48 milled, their orientation perpendicular to the longitudinal extent of the turbine blade blank 26 is. Between the openings 48 be on the blade head 28 and on the blade foot 34 Stege 50 and 54 let stand, leaving the shovel-head blacksmith's grinder core 52 and the shovel-side forge grizzler 56 not fall uncontrollably and damage the device of the invention 2 or cause injury to the operator. The milled openings 48 be between the front end surfaces of the desired profile of the blade head 28 or blade foot 34 and the shovel-headed wrought-iron core attached thereto 52 or blade-side forge grating core 56 brought in. The scoop-head bridge 50 and the blade-footbridge 54 be approximately centered, based on the width of the airfoil 32 , ditched.

In addition, by the milling head 46 two blade-side bracket notches 58 in the front of the blade foot 34 introduced, based on the width of the blade root 34 approximately midway between the central axis of the turbine blade blank 26 and the side end surfaces of the intended profile of the blade root 34 lie.

5 shows a schematic representation of the five-axis milling machine 2 with the turbine blade blank removed therefrom 26 and enlarged plan views of the blade head 28 and the blade foot 34 ,

According to 5 becomes the turbine blade blank 26 released from the clamped state, and the turbine blade blank 26 gets out of the five-axis milling machine 2 taken.

6 shows by means of her 6 (a) a plan view of the turbine blade blank 26 in which the wrought-iron cores 52 and 56 still by webs 50 and 54 with the turbine blade blank 26 connected, and by their 6 (b) a plan view of the turbine blade blank 26 in which the webs 52 and 56 from the turbine blade blank 26 have been separated.

This parting of the shovel-side forge grating core 52 and the shovel-side forge-broiler core 56 can be done mechanically, for example by breaking with the aid of a hammer or by sawing. This controlled removal of forged burr cores 52 and 56 from the turbine blade blank 26 offers the advantage that damage and / or injury can be safely avoided.

The shovel-side forge grating core 52 is thereby removed so that the blade head side web 50 on the blade head 28 the turbine blade blank 26 remains and a blade head side support projection 60 forms with defined width and length.

7 shows a schematic representation of the five-axis milling machine 2 without turbine blade blank clamped therein with support pins attached to the handling units 62 and 66 and jaws 64 and 68 ,

According to 7 are the basic elements 6 and 16 the handling units 4 and 14 now with a left tensioning element side retaining pin 62 and a left jaw 64 or with two right clamping element side support pins 66 and a right-hand jaw 68 Mistake.

For this, the basic elements 6 and 16 with the support pins 38 and 42 and the jaws 40 and 44 from the five-axis milling machine 2 away and through the base elements 6 and 16 with retaining pins 62 and 66 and jaws 64 and 68 replaced.

In this case, the left clamping element side support pin 62 approximately in the middle of the axis of rotation of the handling units 4 and 14 arranged, and the left jaw 64 surrounds the left tension member side retaining pin 62 in a concentric way. The right tensioner side support pins 66 are in the outer end portions of the right base member 16 arranged and the right jaw 68 extends in between.

8th shows a schematic representation of the five-axis milling machine 2 with the turbine blade blank 26 in the second clamped state.

As in 8th can be seen well, are the distances between the blade-side bracket notches 58 and the right tension member side support pins 66 the same, so that the right tensioner side support pins 66 exactly in the blade-side bracket notches 58 can retract.

The second clamping of the turbine blade blank 26 takes place by the left tensioner side support pin 62 against the blade head side retaining projection 60 moves and the right tensioner side support pins 66 in the blade side bracket notches 58 intervention.

The turbine blade blank 26 is thus aligned precisely and repeatably, and now what is in 8th not shown, the turbine blade blank 26 by means of the clamping jaws 64 and 68 clamped.

In the second clamped position according to 8th results in a full accessibility for the turbine blade blank 26 over its entire longitudinal extent.

9 shows a schematic representation of the five-axis milling machine 2 with the therein by means of retaining pins 62 and 66 and support elements 60 and 58 clamped turbine blade blank 26 in which the wrought-iron cores 74 by means of webs 72 with the turbine blade blank 26 are connected.

According to 9 Now the protruding material is processed in the same way as on the front sides (see 4 ). For this purpose, between the side areas of the turbine blade blank 26 and the Schmiedegrat attaching thereto elongated openings 70 milled and in the circumferential direction holding webs 72 let stand between them, so that the blacksmith burr core 74 first still by the holding webs 72 to the turbine blade blank 26 is held and remains at this.

According to 9 be along the airfoil 32 on each side by way of example three holding webs 72 let stand, leaving four elongated openings 70 on each side of the airfoil 32 result. At the transition from the blade 32 to blade foot 34 is the breakthrough 70 also exported to the outside, so that the Schmiedegratkern 74 on the blade 32 from the wrought-iron core 74 of the blade foot 34 is disconnected. The wrought-iron core on the blade foot 34 is still on both sides of each holding bridge 72 on the blade foot 34 held.

10 shows a schematic representation of the five-axis milling machine 2 with the therein by means of retaining pins 62 and 66 and support elements 60 and 58 clamped turbine blade blank 26 in which the webs 72 from the turbine blade blank 26 be separated.

According to 10 become the blacksmith ridge cores 74 by breaking off or by sawing the webs 72 from the turbine blade blank 26 away. This can, as in 10 shown, without the turbine blade blank 26 is released from the second clamping position.

11 shows a schematic representation of the five-axis milling machine 2 with the therein by means of retaining pins 62 and 66 and support elements 60 and 58 clamped turbine blade blank 26 ,

According to 11 is now through the milling head 46 the desired profile of the turbine blade blank 26 finished milled. This also still the previously remaining areas of the retaining bars 72 with removed. This milling can be done with a conventional program control.

12 shows a schematic representation of the five-axis milling machine 2 with the turbine blade blank removed therefrom 26 ,

According to 12 Now the second clamping position is solved by the jaws 64 and 68 and possibly the support pins 62 and 66 be solved. The turbine blade blank 26 gets out of the five-axis milling machine 2 taken.

13 shows a schematic representation of the five-axis milling machine 2 with the turbine blade blank clamped therein 26 in the third clamped state.

According to 13 will now be a set of other clamping elements, each with three jaws 76 and 78 include, provided.

As in 13 It is easy to see that there are two left clamping jaws 76 at the blade head end face of the blade head side support projection 60 are arranged offset outwards, and a right, centrally located clamping jaw 78 provided that the turbine blade blank 26 Clamp. The jaws 76 and 78 are positioned so as to allow mutual access to both blade end faces and thus complete machining of the blade end faces.

As with the second clamping position according to 8th the positioning of the turbine blade blank takes place 26 over the tensioning element side support pins 62 and 66 , the blade-head-side retaining projection 60 and the paddle-side bracket notches 58 , After clamping the turbine blade blank 26 through the jaws 76 and 78 become the support pins 62 and 66 away.

Now can be removed on both blade end faces with a suitable tool, such as a milling head, the residual material to the final contour. The paddle-side support indentations are located in a protruding area of material that is now being milled away.

LIST OF REFERENCE NUMBERS

2

Device for machining a turbine blade blank

4

left handling unit

6

left base element

8th

Alignment unit for blade head

10

baseplate

12

columnar alignment element

14

right handling unit

16

right base element

18

Alignment unit for blade root

20

baseplate

22

columnar alignment elements

24

columnar alignment element with lateral stop

26

Turbine blade blank

28

shovel head

30

Blade construction geometry

32

airfoil

34

blade root

36

Schmiedegrat

38

left support pins

40

left clamping jaw

42

right support pins

44

right clamping jaw

46

milling head

48

milled openings

50

scoop-headed bridge

52

Shovel-head forged burr core

54

blade footbridge

56

blade-side forged log core

58

blade-side support notches

60

scoop-headed support projection

62

left tensioner-side retaining pin

64

left clamping jaw

66

right tensioner side support pins

68

right clamping jaw

70

milled elongated openings

72

retaining webs

74

Schmiedegratkern

76

left clamping jaws

78

right clamping jaws

Claims (14)

Method for machining a turbine blade blank ( 26 ), comprising the following steps: first clamping a forged and cooled turbine blade blank ( 26 ) with forgings ( 36 ) in a processing machine ( 2 ) with two opposing handling units ( 4 ; 14 ); mechanical removal of burrs ( 52 . 56 ) on the blade head ( 28 ) and on the blade root ( 34 ) of the turbine blade blank ( 26 ) forming support elements ( 58 . 60 ), in particular at least one projection ( 60 ) and / or a notch ( 58 ), on the blade head ( 28 ) and on the blade root ( 34 ); second clamping of the turbine blade blank ( 26 ) in the processing machine ( 2 ) by means of the support elements ( 58 . 60 ); and mechanical removal of burrs ( 74 ) on the side areas of the turbine blade blank ( 26 ). Method according to claim 1, wherein for the first clamping of the turbine blade blank ( 26 ) in the processing machine ( 2 ) first the blade head ( 28 ) and the blade root ( 34 ) by means of the handling units ( 4 ; 14 ) mounted alignment elements ( 8th ; 18 ) and then at the handling units ( 4 ; 14 ) attached first clamping elements ( 40 . 44 ) against the blade head ( 28 ) and the blade root ( 34 ). The method of claim 1 or 2, wherein for the second clamping of the turbine blade blank ( 26 ) in the processing machine ( 2 ) second clamping elements are provided, the clamping element-side support elements ( 62 . 66 ) in engagement with the turbine blade blank side support members ( 58 . 60 ) are brought to the turbine blade blank ( 26 ), and the second clamping elements the turbine blade blank ( 26 ) between the handling units ( 4 ; 14 ). Method according to one of the preceding claims, wherein the mechanical removal of the burrs ( 52 . 56 . 74 ) on the blade head ( 28 ) and on the blade root ( 34 ) as well as on the side areas of the turbine blade blank ( 26 ) is carried out by first several elongated openings ( 70 ) between the outer profile of the turbine blade ( 26 ) and the outermost forgings ( 74 ) milled and webs ( 72 ) are left in between and then by the Schmiedegratbereiche ( 74 ) by removing the webs ( 72 ) are separated. Method according to one of the preceding claims, wherein further in the means of the support elements ( 58 . 60 . 62 . 66 ) clamped position of the turbine blade blank ( 26 ) in the processing machine ( 2 ) the profile of the turbine blade ( 26 ) finished, in particular finished milled. Method according to one of the preceding claims, wherein in a subsequent method step, the support elements ( 58 . 60 ) mechanically removed, in particular be milled away. Method according to claim 6, wherein for the mechanical removal of the support elements ( 58 . 60 ) a third clamping of the turbine blade blank ( 26 ) in the processing machine ( 2 ) by means of third clamping elements ( 76 . 78 ) he follows. Device for handling a turbine blade blank ( 26 ), comprising the following features: two opposed rotatable handling units ( 4 ; 14 ) for a turbine blade blank positioned therebetween ( 26 ); at the handling units ( 4 ; 14 ) attachable registration elements ( 8th ; 18 ) for aligning the blade head ( 28 ) and the blade root ( 34 ) of the turbine blade blank ( 26 ); at the handling units ( 4 ; 14 ) attachable first clamping elements ( 40 . 44 ) for clamping the turbine blade blank ( 26 ) between; and at the handling units ( 4 ; 14 ) attachable second clamping elements ( 62 - 68 ) for clamping the turbine blade blank ( 26 ) by means of the support elements ( 58 . 60 ) of the turbine blade blank ( 26 ). Apparatus according to claim 8, wherein the alignment elements 8th ; 18 ) as support elements ( 12 . 22 . 24 ), which extend from one to the handling unit ( 4 ; 14 ) attachable base area ( 10 . 20 ) extend substantially upwardly and the one bearing surface or contact surface for certain areas of the blade head ( 28 ) or the blade root ( 34 ) Offer. Apparatus according to claim 8 or 9, wherein the first clamping elements at least two adjustable support pins ( 38 . 42 ) for supporting the blade head ( 28 ) or the blade root ( 34 ) and at least one jaw ( 40 . 44 ) for the procedure against the blade head ( 28 ) or the blade root ( 34 ) and for clamping it. Device according to one of claims 8 to 10, wherein the second clamping elements adjustable support elements ( 62 . 66 ), in particular retaining pins ( 62 . 66 ), for positioning the turbine blade blank ( 26 ) engaged with the turbine blade blank side support members (FIGS. 58 . 60 ) are brought, and clamping jaws ( 64 . 68 ) for clamping the turbine blade blank between the handling units ( 4 ; 14 ). Device according to one of claims 8 to 11, further comprising third clamping elements ( 76 . 78 ) for clamping the turbine blade blank ( 26 ) in the processing machine ( 2 ) to the support elements ( 58 . 60 ) mechanically remove, in particular wegrass. Device for machining a turbine blade blank ( 26 ), comprising a device for handling a turbine blade blank according to one of claims 8 to 12 and at least one cutting tool ( 46 ), in particular a milling tool ( 46 ) for removing the burrs ( 52 . 56 . 74 ) of the turbine blade blank ( 26 ) and / or for finishing, in particular finish milling of the profile of the turbine blade blank ( 26 ) and / or for the mechanical removal, in particular milling away the support elements ( 58 . 60 ) of the turbine blade blank ( 26 ). Turbine Blade Blank ( 26 ), comprising: a blade head ( 28 ); an airfoil ( 32 ); and a blade foot ( 34 ); wherein on the blade head ( 28 ) and on the blade root ( 34 ) integral support elements ( 58 . 60 ), in particular at least one projection ( 60 ) and / or a notch ( 58 ), are formed around the turbine blade blank ( 26 ) exact position in a processing machine ( 2 ) to clamp.

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